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HR-XV32EK, HR-XV3EX,
HR-XV31EX, HR-XVS30EK,
HR-XVS30EX
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SERVICE MANUAL
DVD PLAYER & VIDEO CASSETTE RECORDER
11 2003 YD002
HR-XV3EK, HR-XV31EK, HR-XV32EK, HR-XV3EX, HR-XV31EX, HR-XVS30EK, HR-XVS30EX
(EK models) (VHS models) (EX models)
(S-VHS models)
(S-VHS models)
HR-XV3EK, HR-XV31EK, HR-XV32EK, HR-XV3EX, HR-XV31EX, HR-XVS30EK, HR-XVS30EX [D3PV1,D3PS1]
TABLE OF CONTENTS
1 2 3 4 5 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LIMITED
No.YD002 2003/11
SPECIFICATION
HR-XV3EK, HR-XV31EK, HR-XV32EK GENERAL Power requirement Power consumption Power on Power off Temperature Operating Storage Operating position Dimensions (W×H×D) Weight Format Maximum recording time (SP) (LP) (EP) VIDEO/AUDIO (VCR deck) Signal system Recording system Signal-to-noise ratio: Horizontal resolution Frequency range Input/Output 250 lines PAL-type colour signal and CCIR monochrome signal, 625 lines/50 fields DA4 (Double Azimuth) head helical scan system 45 dB SP/LP: 250 lines (VHS)/400 lines (S-VHS) EP: 220 lines (VHS)/350 lines (S-VHS) 21-pin SCART connectors: IN/OUT × 1, IN/DECODER × 1 RCA connectors: VIDEO IN × 1, AUDIO IN × 1, AUDIO OUT × 1 S-Video connector: IN × 1 PAL DVD (12 cm, 8 cm), CD (12 cm, 8 cm) DVD:4 Hz - 22 KHz CD:4 Hz - 20 KHz 90 dB Below Measurable Level 90 dB (RCA) 2 Vrms, 1 K -21 dBm to -15 dBm(peak) 99 positions (+AUX position) Frequency synthesized tuner VHF : 44.5 MHz - 143 MHz/ 143MHz - 470 MHz UHF : 470 MHz - 862 MHz VHF : 47 MHz - 89 MHz/ 104 MHz - 300MHz/302 MHz 470 MHz UHF : 470 MHz - 862 MHz VHF : 44.5 MHz - 143 MHz/ 143 MHz - 470 MHz UHF : 470 MHz - 862 MHz VHF : 47 MHz - 89 MHz/ 104 MHz - 300 MHz/302 MHz 470 MHz UHF : 470 MHz - 862 MHz (RCA) 1.0 Vp-p/75 (RCA) 0.7 Vp-p/75 240 min. with E-240 video cassette 480 min. with E-240 video cassette 720 min. with E-240 video cassette 4.5 Kg VHS PAL standard 4.4 Kg 5°C to 40°C -20°C to 60°C Horizontal only 435 mm × 93 mm × 272 mm 4.5 Kg 4.4 Kg S-VHS/VHS PAL standard 26 W 6.0 W 30 W AC 220V - 240V, 50 Hz/60 Hz HR-XV3EX, HR-XV31EX HR-XVS30EK HR-XVS30EX
70 Hz to 10,000 Hz (Normal audio) 20 Hz to 20,000 Hz (Hi-Fi audio) 21-pin SCART connectors: IN/OUT × 1, IN/DECODER × 1 RCA connectors: VIDEO IN × 1, AUDIO IN × 1, AUDIO OUT × 1
VIDEO/AUDIO (DVD deck) Signal system Applicable disc Audio characteristics Frequency response S/N Ratio Wow and flutter Dynamic range Output Component-Y Component-PB/PR Audio Digital Audio TUNER/TIMER(VCR deck) TV channel storage capacity Tuning system Channel coverage
Aerial output Memory backup time ACCESSORIES Provided accessories
UHF channels 22 - 69 (Adjustable) Approx. 10 min. RF cable, Infrared remote control unit, "R6" battery × 2
Specifications shown are for SP mode unless otherwise specified. E.& O.E. Design and specifications subject to change without notice. Manufactured under license from Dolby Laboratories. "Dolby" and the double-D symbol are trademarks of Dolby Laboratories. "DTS" and "DTS Digital Out" are trademarks of Digital Theater Systems, Inc. 1-2 (No.YD002)
1.4 1.4.1 (1) (2) (3) (4) (5)
Precautions for Service
Handling of Traverse Unit and Laser Pickup Do not touch any peripheral element of the pickup or the actuator. The traverse unit and the pickup are precision devices and therefore must not be subjected to strong shock. Do not use a tester to examine the laser diode. (The diode can easily be destroyed by the internal power supply of the tester.) To replace the traverse unit, pull out the metal short pin for protection from charging. When replacing the pickup, after mounting a new pickup, remove the solder on the short land which is provided at the center of the flexible wire to open the circuit. (6) Half-fixed resistors for laser power adjustment are adjusted in pairs at shipment to match the characteristics of the optical block. Do not change the setting of these half-fixed resistors for laser power adjustment.
1.4.2 Destruction of Traverse Unit and Laser Pickup by Static Electricity Laser diodes are easily destroyed by static electricity charged on clothingor the human body. Before repairing peripheral elements of the traverse unit or pickup, be sure to take the following electrostatic protection: (1) Wear an antistatic wrist wrap. (2) With a conductive sheet or a steel plate on the workbench on which the traverse unit or the pick up is to be repaired, ground the sheet or the plate. (3) It solders to two short circuit sections on the substrate of a pick-up. (4) After removing the flexible wire from the connector (CN101), short-circuit the flexible wire by the metal clip. (5) Short-circuit the laser diode by soldering the land which is provided at the center of the flexible wire for the pickup. After completing the repair, remove the solder to open the circuit.
Pick-up
CN101
Short circuit DVD SERVO CONTROL BOARD * Please refer to the SECTION3 DISASSEMBLY method for details.
(No.YD002)1-7
SECTION 2 SPECIFIC SERVICE INSTRUCTIONS
2.1 Different table of feature The following table indicates main different points between models HR-XV3EK, HR-XV31EK,HR-XV32EK, HR-XV3EX, HR-XV31EX, HR-XVS30EK, and HR-XVS30EX.
HR-XV3EK POWER PLUG BODY COLOR FRONT PANEL COVER REMOCON COLOUR VHS 3PIN PURE SILVER USED GRAY PAL/NTSC PB on PAL TV with HiFi NOT USED NOT USED USED HR-XV31EK HR-XV32EK HR-XV3EX CEE PURE SILVER HR-XV31EX HR-XVS30EK 3PIN HR-XVS30EX CEE
NOT USED USED
BLACK
NOT USED
USED
GRAY PAL/MESECAM (MANUAL) / NTSC PB on PAL TV with HiFi
BLACK
PAL/NTSC PB on PAL TV with HiFi USED USED NOT USED SP/LP/EP S-VIDEO, VIDEO,AUDIO (L/R) SCART IN / OUT (Y/C,RGB) DVD:Y/Pb/Pr I NICAM 22-69CH,OFF [AUTO]/I VIDEOPLUS+ NOT USED VCR:ENGLISH DVD:ENGLISH/ FRENCH/ GERMANY USED BLUE
PAL/MESECAM (MANUAL) / NTSC PB on PAL TV with HiFi
S-VHS S-VHS ET SQPB
B/G,D/K NICAM/A2 22-69CH,OFF [AUTO]/G,K SHOWVIEW USED VCR:13 LANGUAGES DVD:ENGLISH/ FRENCH/ GERMANY
B/G,D/K NICAM/A2 22-69CH,OFF [AUTO]/G,K SHOWVIEW USED VCR:13 LANGUAGES DVD:ENGLISH/ FRENCH/ GERMANY
RECORDING & SP/LP PLAYBACK SPEED FRONT INPUT VIDEO,AUDIO (L/R) SCART IN / OUT(RGB) NOT USED I NICAM
REAR L-1 INPUT COMPORNENT VIDEO OUT BROADCASTING STANDARD STEREO DECODER
RF OUT CH/RF OUT 22-69CH,OFF SYSTEM[INITIAL] [AUTO]/I VCR PLUS+ VPS/PDC OSD LANGUAGES VIDEOPLUS+ NOT USED VCR:ENGLISH DVD:ENGLISH/ FRENCH/ GERMANY NOT USED BLUE
WMA(CD-R/RW) ILLUMINATION COLOR
NOT USED BLUE
NOT USED
NOTE : Mark is same as left.
1-8 (No.YD002)
2.2 Service position This unit has been designed so that the Mechanism and Main board assemblies can be removed together from the bottom chassis. Before diagnosing or servicing the circuit boards, take out the major parts from the bottom chassis. 2.2.1 How to set the "Service position" (1) Refer to the disassembly procedure and perform the disassembly of the major parts before removing the Mechanism assembly. (2) Remove the screws that fix the Mechanism, Regulator board assembly to the bottom chassis. If any other screws are used to fix the boards, remove them also. (3) Remove the combined Mechanism,Regulator borad and Main board assemblies. (4) If any other major parts are used, remove them also. (5) Connect the wires and connectors of the major parts that have been removed in steps (1) to (4). (Refer to Fig. 2-2a.) (6) Place the combined Mechanism, Main board and other board assemblies upside down. (7) Insert the power cord plug into the power outlet and then proceed with the diagnostics and servicing of the board assembly. Notes: · Before inserting the power cord plug into the power outlet, make sure that none of the electrical parts are able to short-circuit between the workbench and the board assembly. · For the disassembly procedure of the major parts and details of the precautions to be taken, see "Removing the major parts". · If there are wire connections from the Main board and Mechanism assemblies to the other major parts, be sure to remove them (including wires connected to the major parts) first before performing step (2). · When carrying out diagnosis and repair of the Main board assembly in the "Service position", be sure to ground both the Main board and Mechanism assemblies. If they are improperly grounded, there may be noise on the playback picture or FDP counter display may move even when the mechanism is kept in an inoperative status. · In order to diagnose the playback or recording of the cassette tape, set the Mechanism assembly to the required mode before placing it upside down. If the mechanism mode is changed (including ejection) while it is in an upside down position the tape inside may be damaged. · For some models, the mechanism and board assemblies are attached by connectors only. When carrying out a diagnosis or repair of the boards in the "Service position", make sure that the connectors are not disconnected.
Main board assembly
Regulator board assembly
TP111 D.FF TP4001 CTL.P TP106 PB FM TP2253 A.PB FM TP2254 A.REC FM
Display board assembly
Jack board assembly
Fig.2-2a 2.3 Jig RCU mode This unit uses the following two modes for receiving remote control codes. (1) User RCU mode:Ordinary mode for use by the user. (2) Jig RCU mode: Mode for use in production and servicing. When using the Jig RCU, it is required to set the VCR to the Jig RCU mode (the mode in which codes from the Jig RCU can be received). As both of the above two modes are stored in the EEPROM, it is required to set the VCR back to the User RCU mode each time that an adjustment is made or to check that the necessary operations have been completed.These modes can be set by the operations described below. Note: · Confirm the RCU mode when exchanged parts. Since some SERVICE PARTS sets the VCR to the Jig RCU mode as initial setting. Therefore please set the VCR to the user RCU mode after replacing the EEPROM.
User RCU mode
CH
Jig RCU mode
CH
(
not displayed)
Fig.2-3a User/Jig RCU mode 2.3.1 Setting the Jig RCU mode (1) Turn on the power. (2) Press the following remocon keys continuously within 2 seconds " SET UP MENU " " 2 " " 8 " " OK ". When the VCR is set to the Jig RCU mode, the symbols ( " : " ) in the time display of the FDP are turned off. (Refer to Fig.2-3a)
(No.YD002)1-9
2.3.2 Setting the User RCU mode (1) Turn off the power. (2) Press the "REC" and "PAUSE" buttons of the VCR simultaneously. Alternatively, transmit the code "80" from the Jig RCU. 2.4 Mechanism service mode This model has a unique function to enter the mechanism into every operation mode without loading of any cassette tape. This function is called the "Mechanism service mode". 2.4.1 How to set the "Mechanism service mode" (1) Set the VCR to the Jig RCU mode (the mode in which codes from the Jig RCU can be received) (2) Transmit the code "E5" from the Jig RCU. (3) Release the lug of the Cassette holder and then slide the Cassette holder toward the direction where the Cassette holder is loaded by manually. (4) The cassette holder lowers and, when the loading has completed, the mechanism enters the desired mode. When the VCR is set to the Mechanism service mode, the symbols ("Timer") in the FDP (LED) are blinked. 2.4.2 How to exit from the "Mechanism service mode" (1) Unplug the power cord plug from the power outlet. 2.5 Maintenance and inspection 2.5.1 Cleaning Regular cleaning of the transport system parts is desirable but practically impossible. So make it a rule to carry out cleaning of the tape transport system whenever the machine is serviced. When the video head, tape guide and/or brush get soiled, the playback picture may appear inferior or at worst disappear, resulting in possible tape damage. Note: · Absolutely avoid sweeping the upper drum vertically as this will cause damage to the video head. (1) When cleaning the upper drum (especially the video head), soak a piece of closely woven cloth with alcohol and while holding the cloth onto the upper drum by the fingers, turn the upper drum counterclockwise. (2) To clean the parts of the tape transport system other than the upper drum, use a piece of closely woven cloth or a cotton swab soaked with alcohol. (3) After cleaning, make sure that the cleaned parts are completely dry before using the cassette tape.
2.5.2 Lubrication With no need for periodical lubrication, you have only to lubricate new parts after replacement. If any oil or grease on contact parts is soiled, wipe it off and newly lubricate the parts. Note: · See the "mechanism assembly" diagram of the "parts list" for the lubricating or greasing spots, and for the types of oil or grease to be used. 2.5.3 Suggested servicing schedule for main components The following table indicates the suggested period for such service measures as cleaning, lubrication and replacement. In practice, the indicated periods will vary widely according to environmental and usage conditions. However, the indicated components should be inspected when a set is brought for service and the maintenance work performed if necessary. Also note that rubber parts may deform in time, even if the set is not used. System Parts name Drum assembly A/C head Pinch roller arm assembly Tape transport Full erase head Tension arm assembly Capstan motor (Shaft) Guide arm assembly Capstan motor Capstan brake assembly Main brake assembly Drive Belt (Capstan) Loading motor Clutch unit Worm gear Control plate Other Rotary encoder X Operation hours 1000H C,X C,X C C C C C 2000H X C,X C C C C C X X X X X X X X X
C : Cleaning X : Inspection or Replacement if necessary
A/C head
Video heads
Fig.2-6a
1-10 (No.YD002)
SECTION 3 DISASSEMBLY
3.1 Removing the major parts 3.1.3 Disassembly procedure
Step/ Part Name Loc No. [1] Top cover [2] Front panel assembly (Display board assembly) (Jack board assembly) [3] Fig. Point No. 3-1d 6(S1a) 3-1a 4(L2a),5(L2b),2(S2a) 3-1d CN7104(WR2a), CN3102(WR2b), CN3103(WR2c), Mechanism assembly 3-1b CN2001(WR3a) 3-1c 3(S3a),(S3b) -------------------------(Drum assembly) 3-1d CN(WR3b) (S3c),(S3d),(S3e) -------------------------(Inertia plate) 4(L3a) -------------------------(Roller arm assembly) (P3a),(L3b) DVD unit 3-1d 3(S4a),(L4a),(S4b) (Bracket) 2(S4c),CN5302(CN501) CN7301(CN502) Rear cover 3-1d 7(S5a),(S5b),3(L5a) Regulator board assembly 3-1d 3(S6a) CN5303(WR6a), CN5301(WR6b) Main board assembly 3-1d 2(S7a) Note
3.1.1 Destination of connectors
Two kinds of double-arrows in connection tables respectively show kinds of connector/wires. : Flat wire : Wire : Board to board (B-B) : The connector of the side to remove
CONN. No. WR2a WR2b Main Main CN101 CN103 CONNECTOR Digital Digital CN761 CN762 PIN No. 40 10
Destination of connectors
CONN. No. WR2a WR2b WR2c WR3a WR3b CN5302 (CN501) CN7301 (CN502) WR6a WR6b Main Main Main Main Drum assembly Regulator CN5302 Main CN7301 CN7104 CN3102 CN3103 CN2001 CONNECTOR Jack Display Display A/C head Main CN1 CN7191 CN7003 CN7004 PIN No. 11 14 14 6 9 [7] 22 22 11 11 [5] [6] [4]
DVD servo control CN501 DVD servo control CN502 Main Main CN5313 CN5311
Regulator CN5303 Regulator CN5301
· Be careful not to damage the connector and wire etc. during connection and disconnection. · When connecting the flat wire to the connector, be careful with the flat wire direction. · When reattaching the Front panel assembly, make sure that the door opener of the Side frame (R) is lowered in position prior to the reinstallation. · When reattaching the Front panel assembly, pay careful attention to the switch lever of the Front panel assembly not to make it touch the switch knob of the Main board assembly from the side. · When reattaching the Front panel assembly, lift the Cassette door slightly.
3.1.2 How to read the procedure table This table shows the steps for disassembly of the externally furnished parts and board assemblies. Reverse these steps when re-assembling them.
Step/ Loc No. [1] Part Name Top cover Fig. No. Point Note
Bracket (1) (2)
3-1a 4(S1a),(S1b),3(L1a), 2(SD1a),(P1a),(W1a), CN1(WR1a), ---------------------------------------2(S1c) (3) (4) (5)
(1) Order of steps in Procedure When reassembling, perform the step(s) in the reverse order. These numbers are also used as the identification (location) No. of parts Figures. (2) Part name to be removed or installed. (3) Fig. No. showing procedure or part location. (4) Identification of part to be removed, unhooked, unlocked, released, unplugged, unclamped or unsoldered. P= Spring, W= Washer, S= Screw, L= Locking tab, SD= Solder, CN**(WR**)= Remove the wire (WR**) from the connector (CN**). Note: · The bracketed ( ) WR of the connector symbol are assigned nos. in priority order and do not correspond to those on the spare parts list. (5) Adjustment information for installation
Door opener
Side frame(R)
Switch knob
Switch lever
Fig.3-1a · When reattaching the Mechanism assembly, secure the screws (S3a to S3b) in the order of 1,2,3. · When reattaching the Mechanism assembly, be sure to align the phase of the Rotary encoder on the Main board assembly. · When reattaching the Mechanism assembly, set the "Mechanism assembling mode". [See "MECHANISM ASSEMBLY SERVICE MANUAL (No. 86700)".] · When reattaching the Mechanism assembly to the Main board assembly, take care not to damage the sensors and switch on the Main board assembly.
(No.YD002)1-11
· When reattaching the Drum assembly, secure the screws (S3c to S3e) in the order of c, d, e.
(S3d) Mechanism assembly (S3c) (S3e) (S3d) (S3e)
Drum assembly
(S3c)
HOOK
Attach the Drum assembly appropriately, since the installation state of the Drum assembly influences the FM WAVEFORM LINEARITY greatly.
Fig.3-1b · When handling the drum assembly alone, hold it by the motor or shaft. Be careful not to touch other parts, especially the video heads. Also take care not to damage the connectors.
Shaft Motor Video heads
Fig.3-1c
1-12 (No.YD002)
HOLD PART OF ROLLER ARM ASS'Y (L3a) WHILE ATTACHING INERTIA PLATE. INERTIA PLATE SHOULD BE ATTACHED SO AS TO SER SMALL DIAMETER OF CENTRAL ROUND HOLE ABOVE. POSITION ROLLER'S INSTALLATION HOLE IN THE "A" PART. INSERT ROLLER UNTIL THE "b" PART OF ROLLER'S HOOK IOCK UP TO THE "B" PART. HITCH THE "c" PART OF SPRING TO THE "C" PART. (P3a)"c" (L3b)"b" "B"
"A"
"C"
(S1a) [1]Top cover (S1a) (S1a)
Roller arm assembly
[3]Inertia plate
[3]Roller arm assembly
(S3a) 1 [3] Mechanism assembly (S3a) 2
f
(S1a)
[3]Drum assembly
(S3a) 3
f
(S5a) (S5a) (S5b) (S5a) (S5a) (S5a) (L5a) (S5a) (S5a)
(S3b)
b
(S3c) (S3d)
(S3e) (S7a) (L5a) Terminal board assembly 2D Digital board assembly [5]Rear cover (L5a)
(S7a)
. Accord the position of V gap on R.ENCORDER and PWB silk . Accord the position of Boss on R.ENCORDER and PWB silk
JS3001
(S4a) [7]Main board assembly (S4a) (S4b) (S4c) CN7301 (S4a) (L4a) [4]Bracket (L2a) (L2b) (S2a) (L2a) Cassete door [2]Front panel assembly (S6a) (S6a) CN5302 DVD servo control board assembly [6]Regulator board assembly (S4c) (S6a) CN502 CN501 [4]DVD unit
(L2b)
(L2b)
(WR3b)
Bottom side Jack board assembly
(WR2b)
(WR2c)
CN2001 CN5001
(WR3a)
CN7004
(WR6a)
CN7191
CN7003
CN5313
CN5303 CN5301
CN7104
CN5311
(WR2a)
Display board assembly Top side
(WR6b)
CN3102 CN3103
A
Jack board assembly CN7191
Fig.3-1d (No.YD002)1-13
3.2
Loading mechanism assembly
3.2.1 Removing the tray (See Figure 3-2a, Figure 3-2b, Figure 3-2c, Figure 3-2d, Figure 3-2e, Figure 3-2f) (1) Push a of the slide cam on the hole in the right side of the Tray loading base by using a driver until it stops. (See Figure 32a.) (2) The tray comes out. Pull the tray in a front direction until it stops. (3) Remove the two screws A attaching the slide bracket. (See Figure 3-2b.) (4) Tilt the tray in a direction of the arrow around the point in the left rear part of the tray. (See Figure 3-2c.) (5) The rail of the tray is removed from b of the loading base. Then, remove the tray upward. (See Figure 3-2d.) Attaching the tray: Engage c of the loading base to the projection of the tray while tilting the tray to the left. Turn the tray in a direction of the arrow, and attach the slide bracket. (See Figure 3-2e.) Note: Prior to the procedure above, move the slide cam in a direction of the arrow so that d of the slide cam can be inserted in e of the tray. (See Figure 3-2f.)
The point in the left rear part Fig.3-2c
Tray
Loading base part b
Rail of the tray
Fig.3-2d
Push Slide cam part a Fig.3-2a Loading base Projection of the tray
A
Slide bracket
A
Tray
Loading base part c
Fig.3-2e
Part e
Fig.3-2b
Part d
Slide cam
Fig.3-2f
1-14 (No.YD002)
3.2.2 Removing the traverse mechanism assembly (See Figure 3-2g) Reverse the loading mechanism assembly. Remove the four screws B attaching the traverse mechanism assembly. Remove the traverse mechanism assembly upward.
Loading mechanism assembly
B
B
B
Traverse mechanism assembly Fig.3-2g
3.2.3 Removing the elevator (See Figure 3-2h and Figure 3-2j) · Prior to the following procedure, remove the traverse mechanism assembly. (1) Remove the two arms of the elevator from the two parts f by moving the arms in a direction of the arrow. (2) Pull out the elevator in a rear direction. Attaching the elevator: Engage the two holes g to the two shafts on the front part of the elevator. And then, attach the elevator.
B
Elevator
Part f
Part f
Fig.3-2h
g Elevator
Slide cam
g
Shaft
Fig.3-2j
(No.YD002)1-15
3.2.4 Removing the loading motor (See Figure 3-2k and Figure 3-2l) · Prior to the following procedure, remove the tray, the traverse mechanism assembly, and the elevator. (1) Remove the belt from the pulley. (2) Remove two screws C attaching the loading motor. (3) Remove two solders h on the switch board.
Belt Pulley C
Loading base Slide cam
Pulley C
Fig.3-2k
Switch board Part h
Loading motor
Fig.3-2l 3.3 Traverse mechanism assembly
3.3.1 Removing the pickup (See Figure 3-3a, Figure 3-3b) · Prior to the following procedure, remove the traverse mechanism assembly. (1) Remove one screw D attaching the plate. (2) Remove the plate and the leaf spring. (3) Lift i of the shaft 1, and pull out the shaft 1 from j. (4) Remove k of the pickup from the shaft 2. Attaching the pickup: (1) Engage k of the pickup to the shaft 2. (2) Insert the shaft 1 in j, and attach the shaft 1 to i. (3) Attach the leaf spring, and then attach the plate. Fix the leaf spring and the plate by using the screw D.
D Leaf spring Plate
Fig.3-3a
Shaft 2 Part j
Part k
Shaft 1 Part i
Fig.3-3b 1-16 (No.YD002)
SECTION 4 ADJUSTMENT
4.1 Before adjustment 4.1.4 Color (colour) bar signal,Color (colour) bar pattern 4.1.1 Precaution · The adjustments of this unit include the mechanism compatibility and electrical adjustments. During the performance of this work, be sure to observe the precautions for each type of adjustment. · If there is a reference to a signal input method in the signal column of the adjustment chart, "Ext. S-input" means the Y/C separated video signal and "Ext. input" means the composite video signal input. · Unless otherwise specified, all measuring points and adjustment parts are located on the Main board. 4.1.2 Required test equipments · Color (colour) television or monitor · Oscilloscope: wide-band, dual-trace, triggered delayed sweep · Signal generator: RF / IF sweep / marker · Signal generator: stairstep, color (colour) bar [PAL] · Recording tape · Digit-key remote controller(provided) 4.1.3 Required adjustment tools : Used --- : Not used
Mechanism compatibility adjustment Roller driver Jig RCU Back tension cassette gauge Alignment tape(MHPE) Alignment tape(MHPE-L) Alignment tape(MHP-L)
Roller driver PTU94002 Jig RCU PTU94023B
INITIAL MODE CUSTOM CODE 43: A CODE DATA CODE
Colour bar signal [PAL]
White(100%) Yellow White(75%) Cyan Green Magenta Red
Colour bar pattern [PAL]
(75%)
Magenta
Yellow
Green
White
Cyan
Blue
0.7 V 1V
Burst
0.3 V 0.3 V V Horizontal sync U V V(R-Y) U(B-Y) U White 100% Black
4.1.5 Switch settings When adjusting this unit, set the VCR mode and switches as described below. · When using the Jig RCU, it is required to set the VCR to the Jig RCU mode. (See "SECTION 2 SPECIFIC SERVICE INSTRUCTIONS")
Jig RCU [Data transmitting method] Depress the " "( 3 ) button after the data code is set.
Electrical adjustment
----------Back tension cassette gauge
Fig.4-1a Jig RCU [PTU94023B] · Set the switches as shown below unless otherwise specified on the relevant adjustment chart. The switches that are not listed below can be set as desired. If the VCR is not equipped with the functions detailed below, setup is not required.
AUTO PICTURE/VIDEO CALIBRATION/ B.E.S.T./D.S.P.C. PICTURE CONTROL/SMART PICTURE VIDEO STABILIZER TBC Digital 3R VIDEO NAVIGATION/TAPE MANAGER BLUE BACK OFF NORMAL/NATURAL OFF ON ON OFF OFF
PUJ48076-2
Alignment tape (SP, stairstep, PAL) MHPE
Alignment tape (LP, stairstep, PAL) MHPE-L
DVD test disc VT-501
CD-DA test disc CTS-1000
4.1.6 Manual tracking mode (Auto tracking ON/OFF) setting (1) In order to set to the manual tracking mode during tape playback, press the "SP/EP(LP)"button on the remote control unit. · Each press of the button switches the auto tracking ON or OFF. · When the manual tracking mode is set, the tracking is placed at the center position. (2) Press "channel +/-" to adjust the tracking manually.
(No.YD002)1-17
Blue
Red
4.1.7 EVR Adjustment Some of the electrical adjustments require the adjustment performed by the EVR system. The main unit have EEPROMs for storing the EVR adjustment data and user setups. Notes: · In the EVR adjustment mode, the value is varied with the channel buttons (+, ). The adjusted data is stored when the setting mode changes (from PB to STOP, when the tape speed is changed, etc.). Take care to identify the current mode of each adjustment item when making an adjustment. · When changing the address setting in the EVR adjustment mode, use the Jig RCU or the remote controller having numeric keypad with which a numeric code can be directly input. The remote control code of the Jig RCU corresponds to each of the digit keys on the remote controller as follows.
Digit-key Code 0 20 1 21 2 22 3 23 4 24 5 25 6 26 7 27 8 28 9 29
4.2 Mechanism compatibility adjustment [VHS SECTION] Notes: · Although compatibility adjustment is very important, it is not necessary to perform this as part of the normal servicing work. It will be required when you have replaced the A/C head, drum assembly or any part of the tape transport system. · To prevent damaging the alignment tape in the compatibility adjustment, prepare a cassette tape (for self-recording/ playback), perform a test on it by transporting it and making sure that the tape is not bent by the tape transport mechanisms such as in the guide rollers.(See Fig.4-2b.) 4.2.1 Tension pole position Notes: · This adjustment must be performed every time the tension band is replaced.
Signal Mode (A) · Back tension cassette gauge [PUJ48076-2]
(B1) · PB (B2) · Eject end · Adjust pin [Mechansim assembly] · 25 - 51 gfcm (2.45 - 5 x 10
-3
· As the counter indication and remaining tape indication are not displayed FDP during the EVR adjustment mode, check them on the TV monitor screen. · When performing the EVR adjustment, confirm that the FDP indication is changed to the EVR mode, as shown below.
FDP
Adjustment part (F) Specified value (G)
Nm)
Fig.4-1b EVR mode
(1) Play back the back tension cassette gauge (A). (2) Check that the indicated value on the left side gauge is within the specified value (G). (3) If the indicated value is not within the specified value (G), perform the adjustment in a following procedure.(See Fig.4-2a.) a) Remove the top frame, cassette holder and side frames (L/R) all together. (refer to the SERVICE MANUAL No.86700 [MECHANISM ASSEMBLY].) b) Rotate the loading motor gear to move the control plate so that the triangular stamping to the left of the "P"stamping is aligned with the stamping (a) on the main deck. This positioning is mode (B1). c) Adjust by turning the adjustment pin so that the tip of the tension arm is aligned with the stamping (b) on the main deck. d) Rotate the reel disk (S) by about one turn clockwise and make sure that the round hole of the adjustment pin is located in the "OK" range. If it is outside this range, restart the adjustment from the beginning. After completion of the adjustment, rotate the loading gear motor to return it to the mode (B2) position.
TENSION ARM
CONTROL PLATE Stamping(a) Stamping(b) OK
NG ADJUST PIN
Fig.4-2a
1-18 (No.YD002)
4.2.2 FM waveform linearity
Signal Mode Equipment Measuring point External trigger Adjustment part Specified value Adjustment tool (A1) (A2) (B) (C) (D) (E) (F) (G) (H) · · · · · · · · · Alignment tape(SP, stairstep, PAL) [MHPE] Alignment tape(LP, stairstep, PAL) [MHPE-L] PB Oscilloscope TP106 (PB. FM) TP111 (D.FF) Guide roller [Mechanism assembly] Flat V.PB FM waveform Roller driver [PTU94002]
Proper waveform variation
Improper waveform variation Up Down
(1) Play back the alignment tape (A1). (2) Apply the external trigger signal to D.FF (E), to observe the V.PB FM waveform at the measuring point (D). (3) Set the VCR to the manual tracking mode. (4) Make sure that there is no significant level drop of the V.PB FM waveform caused by the tracking operation, with its generally parallel and linear variation ensured. Perform the following adjustments when required. (See Fig. 4-2c.) (5) Reduce the V.PB FM waveform by the tracking operation. If a drop in level is found on the left side, turn the guide roller of the pole base assembly (supply side) with the roller driver to make the V.PB FM waveform linear. If a drop in level is on the right side, likewise turn the guide roller of the pole base assembly (take-up side) with the roller driver to make it linear. (See Fig. 4-2c.) (6) Make sure that the V.PB FM waveform varies in parallel and linearly with the tracking operation again. When required, perform fine-adjustment of the guide roller of the pole base assembly (supply or take-up side). (7) Unload the cassette tape once, play back the alignment tape (A1) again and confirm the V.PB FM waveform. (8) After adjustment, confirm that the tape wrinkling does not occur at the roller upper or lower limits. (See Fig. 4-2b.) [Perform adjustment step (9) only for the models equipped with SP mode and EP (or LP) mode.] [Perform adjustment step (9) only for the models equipped with SP mode and EP (or LP) mode.] (9) Repeat steps (1) to (8) by using the alignment tape (A2).
Improper Proper
A
B Roller driver
C
D
Guide roller (supply side)
Fig.4-2c 4.2.3 Height and tilt of the A/C head Note: · Set a temporary level of the height of the A/C head in advance to make the adjustment easier after the A/C head has been replaced. (Refer to the SERVICE MANUAL No.86700 [MECHANISM ASSEMBLY].)
(A) (B) (C) (D1) (D2) External trigger (E) Adjustment part (F) Specified value (G) Signal Mode Equipment Measuring point · · · · · · · · Alignment tape(SP, stairstep, PAL) [MHPE] PB Oscilloscope AUDIO OUT terminal TP4001 (CTL. P) TP111 (D.FF) A/C head [Mechanism assembly] Maximum waveform
(a) GUIDE ROLLER
(b) GUIDE POLE
Fig.4-2b
(1) Play back the alignment tape (A). (2) Apply the external trigger signal to D.FF (E), to observe the AUDIO OUT waveform and Control pulse waveform at the measuring points (D1) and (D2) in the ALT mode. (3) Set the VCR to the manual tracking mode. (4) Adjust the AUDIO OUT waveform and Control pulse waveform by turning the screws (1), (2) and (3) little by little until both waveforms reach maximum. The screw (1) and (3) are for adjustment of tilt and the screw (2) for azimuth.
Head base (2) (1) AUDIO OUT
A/C head (3)
CTL.P
Fig.4-2d
(No.YD002)1-19
4.2.4 A/C head phase (X-value)
Signal Mode Equipment Measuring point External trigger Adjustment part Specified value Adjustment tool (A1) (A2) (B) (C) (D) (E) (F) (G) (H) · · · · · · · · · Alignment tape(SP, stairstep, PAL) [MHPE] Alignment tape(LP,stairstep,PAL) [MHPE-L] PB Oscilloscope TP106 (PB. FM) TP111 (D.FF) A/C head base [Mechanism assembly] Flat V.PB FM waveform Roller driver [PTU94002]
4.3 Electrical adjustment [VHS SECTION] Note: The following adjustment procedures are not only necessary after replacement of consumable mechanical parts or board assemblies, but are also provided as references to be referred to when servicing the electrical circuitry. In case of trouble with the electrical circuitry, always begin a service by identifying the defective points by using the measuring instruments as described in the following electrical adjustment procedures. After this, proceed to the repair, replacement and/or adjustment. If the required measuring instruments are not available in the field, do not change the adjustment parts (variable resistor, etc.) carelessly. 4.3.1 Servo circuit 4.3.1.1
Signal
(1) Play back the alignment tape (A1). (2) Apply the external trigger signal to D.FF (E), to observe the V.PB FM waveform at the measuring point (D). (3) Set the VCR to the manual tracking mode. (4) Loosen the screws (4) and (5), then set the Roller driver to the innermost projected part of the A/C head. (See Fig. 42e.) (5) Rotate the roller driver so that the A/C head comes closest to the capstan. From there, move the A/C head back gradually toward the drum until the point where the FM waveform is maximized for the second time, and then tighten the screws (4) and (5) temporarily. (6) Play an alignment tape (A2) and set to the manual-tracking mode. (7) Fine-adjust A/C head base position to maximize the FM waveform, and then tighten the screws (4) and (5) firmly. (8) Play alignment tapes (A1) and (A2) and confirm that the FM waveforms are maximized when the tracking is at the center position.
Switching point
· · · · · · · · · · · Stairstep signal Alignment tape(LP,stairstep,PAL) [MHPE-L] PB Oscilloscope VIDEO OUT terminal (75 ohm terminated) TP106 (PB. FM) TP111 (D.FF) Jig RCU: Code "5A" 6.5±0.5H (VHS models) 7.5±0.5H (S-VHS models) Jig RCU [PTU94023B]
(A1) (A2) Mode (B) Equipment (C) Measuring point (D) External trigger (E) Adjustment part (F) Specified value (G) Adjustment tool (H)
To the drum Toward the capstan
Roller driver Screw (4) Head base
Toward the drum A/C head Screw (5)
(1) Play back the signal (A1) of the alignment tape (A2). (2) Apply the external trigger signal to D.FF (E) to observe the VIDEO OUT waveform and V.PB FM waveform at the measuring points (D1) and (D2). (3) Set the VCR to the manual tracking mode. (4) Adjust tracking so that the V.PB FM waveform becomes maximum. (5) Set the VCR to the Auto adjust mode by transmitting the code (F) from the Jig RCU. When the VCR enters the stop mode, the adjustment is completed. (6) If the VCR enters the eject mode, repeat steps (1) to (5) again. (7) Play back the alignment tape (A2) again, confirm that the switching point is the specified value (G).
Trigger point V.sync Switching point
To the capstan
Fig.4-2e
Alignment tape [SP, stairstep] played with the SP head Alignment tape [EP(LP), stairstep] played with the EP(LP) head
Waveform output
V. rate
Fig.4-3a Switching point 4.3.1.2
Signal
Slow tracking preset
(A1) (A2) (B1) (B2) (D) (F) (G) (H) · · · · · · · · Ext. input Color (colour) bar signal [PAL] VHS SP VHS LP TV-Monitor Jig RCU: Code "71"or "72" minimum noise Jig RCU [PTU94023B]
X-value adjustment point Drum side Control head position Capstan side
Mode Measuring point Adjustment part Specified value Adjustment tool
Maximum
Fig.4-2f
1-20 (No.YD002)
(1) Record the signal (A2) in the mode (B1), and play back the recorded signal. (2) Set the VCR to the manual tracking mode. (3) Set the VCR to the FWD slow (+1/6x) mode. (4) Transmit the code (F) from the Jig RCU to adjust so that the noise bar becomes the specified value (G) on the TV monitor in the slow mode. (5) Set the VCR to the Stop mode. (6) Confirm that the noise bar is (G) on the TV monitor in the slow mode. (7) Repeat steps (3) to (6) in the REV slow (-1/6x) mode. (8) Repeat steps (1) to (7) in the mode (B2). Note: · For FWD slow (+1/6x) playback, transmit the code "08" from the Jig RCU to enter the slow playback mode, and transmit the code "D0"for REV slow (-1/6x) mode. 4.3.2 Video circuit 4.3.2.1
Signal
4.3.3 Syscon circuit Notes: · When perform this adjustment, remove the Mechanism assembly. 4.3.3.1 Timer clock
· · · · · · · · No signal EE Frequency counter IC3001 pin 44 IC3001 pin 103 C3054 + and C3025 (TIMER CLOCK) 1024.008 ± 0.001 Hz (976.5549 ± 0.0010 usec) (A1) (B) (C) (D1) (D2) (D3) Adjustment part (F) Specified value (G) Signal Mode Equipment Measuring point
EE Y/PB Y (S-VHS) level
· · · · · · · · · · · · · · Ext. S-input Ext. input Color (colour) bar signal [PAL] EE SP S-VHS SP VHS SP Oscilloscope Y OUT terminal Jig code "57" A : 11 Jig code "21" twice Jig code "18" or "19" (Channel +/-) 1.00 ± 0.05 Vp-p (75 ohm terminated) Jig RCU [PTU94023B]
(A1) (A2) (A3) Mode (B1) (B2) (B3) Equipment (C) Measuring point (D) EVR mode (F1) EVR address (F2) (F3) (F4) Specified value (G) Adjustment tool (H)
(1) Connect the frequency counter to the measuring point (D1). (2) Connect the short wire between the short point (D2) and Vcc (5V). (3) Short the leads of capacitor (D3) once in order to reset the microprocessor of the Syscon. (4) Disconnect the short wire between the short point (D2) and Vcc then connect it again. (5) Adjust the Adjustment part (F) so that the output frequency becomes the specified value (G). 4.3.4 Audio circuit [S-VHS models] Notes: · GND (Ground) should be taken from the Tuner shield case. 4.3.4.1
Signal
Audio REC FM
(A1) (A2) (A3) (B) (C) (D) (E) (H) (G1) (G2) · · · · · · · · · · Ext. input Audio: No signal Video: Color (colour) bar signal [PAL] S-VHS LP Oscilloscope TP2253 (A. PB. FM) TP111 (D.FF) VR2251 (REC. FM) 600 ± 100 mVp-p More than 400 mVp-p
(1) (2) (3) (4) (5) (6)
(7)
(8) (9) (10) (11) (12) (13) (14) (15)
Input the signal (A3) from the input point (A1). Set the VCR to the mode (B1). Observe the Y OUT waveform at the measuring point (D). Set the VCR to the EVR mode by transmitting the code (F1) from the Jig RCU. Set the EVR address to (F2) by transmitting the code (F3) from the Jig RCU. Transmit the code (F4) from the Jig RCU to adjust so that the Y level of the Y OUT waveform becomes the specified value (G). Release the EVR mode of the VCR by transmitting the code (F1) from the Jig RCU again. (When the EVR mode is released, the adjusted data is memorized.) Input the signal (A3) from the input point (A2). Repeat steps (3) to (7) in the mode (B1). Record the signal (A3) in the mode (B2), and play back the recorded signal. Set the VCR to the manual tracking mode. Repeat steps (3) to (7) in the mode (B2). Record the signal (A3) in the mode (B3), and play back the recorded signal. Set the VCR to the manual tracking mode. Repeat steps (3) to (7) in the mode (B3).
Mode Equipment Measuring point External trigger Adjustment part Specified value
(1) Apply the external trigger signal to D.FF (E) to observe the Audio PB FM waveform at the measuring point (D). (2) Record the signal (A3) with no audio signal input in the mode (B), and play back the recorded signal. (3) Set the VCR to the manual tracking mode. (4) If the A.PB FM level is not within the specified value (G1), perform the adjustment in a following procedure. (5) Adjust the adjustment part(F) so that the A. PB FM level of the higher channel level becomes the specified value(G1). (Adjust before recording, then confirm it by playing back.) (6) If specified value(G1) is not obtained, adjust the Adjustment part(F) so that the waveform level of the lower channel level becomes the specified value(G2).(Adjust before recording, then confirm it by playing back.)
Y level
Specified value (G2) V. rate
Specified value (G1)
H. rate
Fig.4-3c Audio REC FM
Fig.4-3b EE Y/PB Y lebel
(No.YD002)1-21
4.4
Electrical adjustment (DVD SECTION)
4.4.1 Test mode setting method (1) Press POWER button then press VCR/DVD repeatedly so that the DVD indicatorlights up. (2) Press the POWER button again to set the stand-by mode. (3) Transmit the code "FA" from the Jig RCU. (4) The FDP shows the test mode content in the form of " 0 ". (5) To release test mode, press "POWER" key of the front panel. (6) Each pressing of "SET UP MENU" key of the remote controller in test mode changes the mode as follows.
*
*
Becames test mode Version of firmware
CS VCR DTV D-S-VHS CH
FDP becames all lighting Check mode Not used
4.4.2 Method of displaying version of firmware (1) Set the main body at test mode. (2) Press "SET UP MENU" key of the remote controller once. Then, version number and alphabetical letter of the system controller and the back end are displayed in the FL display as follows:
FDP (Example)
07_19_16
System controller
Back end Front end
4.4.3 Initialization method Please initialize according to the following procedures in the following case: · Just after you upgrade the firmware. · After you confirm the symptoms that a customer points out. First Initialize, and then confirm whether the symptoms are improved or not. · After servicing, before returning the main body to a customer. (Initialized main body should be returned to a customer.) (1) Set the main body at test mode. (2) Press "PAUSE" key of the front panel or transmit the code "6F" from the Jig RCU. (3) When initialization is completed, the FDP changes from "0" to "00".(The left "0" of "00" is not always "0". It shows parameter adjustment status.) 4.4.4 All-initialization method Please perform all-initialization according to the following procedures in the following case: · Just after you exchange the pick-up. · Just after you exchange the spindle motor. · Just after you exchange the traverse mechanism base. NOTE: Please perform all-initialization when you exchange the parts above and also when you remove the parts above. · Just after the flap adjustment of the pick-up guide shaft (1) Set the main body at test mode. (2) Press the "REVERSE SKIP/INDEX ( )" key of the remote controller for more than 2 seconds. (3) When all-initialization is completed, the FDP changes from "0" to "33". NOTE: After all-initialization, be sure to perform optimization adjustment of Front End parameter.
1-22 (No.YD002)
4.4.5 Optimization adjustment of Front End parameter Adjustment to optimize Front End parameter must be performed in each mechanism assembly of this model for high-speed starting.Please perform optimization according to the following procedures just after all-initialization is completed and when FL display shows anything except "0" (For example when FDP shows "1", "2", and "3") at test mode. (1) Press "POWER" button of the front panel to turn the main body on (not to set the main body at test mode). (2) Insert the test disc VT-501 or commercial dual-layer DVD software. (3) Remove the disc when the FL display changes from "READ" to disc information. (4) Perform the same procedures as in (2) and (3) above by using the test disc CTS-1000 or commercial CD-DA software. (5) Set the main body at test mode, and check that the FDP shows "0". NOTE: Status of this adjustment can be judged by the number displayed at test mode as follows: DVD adjustment Adjusted Not adjusted Adjusted Not adjusted CD adjustment Adjusted Adjusted Not adjusted Not adjusted FDP at test mode 0 1 2 3
NOTE: As for a disc used for adjustment, · Disc should be mounted. ("Mounting" means to display "READ" after the disc is inserted and then display the disc information.) Disc need not be played. · If you do not have test disc either VT-501 (DVD) or CTS-1000 (CD-DA), use a commercial disc (for DVD, dual-layer software) after seeing and checking that the disc is neither curved nor foreseen that it may shake at the time of playback.If you use a disc with bad features, starting time may be slow or disc may not be read. 4.4.6 Display of current value of laser (1) Set the main body at test mode. (2) Press "SET UP MENU" key of the remote controller three times. Then, FDP is displayed "CHECK". (3) The laser current value can be switched between the value of CD and that of DVD by pressing the following key of the remote controller.
FDP (Example)
2530
****
Remote controller "4" key --- Laser of CD Remote controller "5" key --- Laser of DVD
The number shown in the FDP shows mA of current value of laser.The first two numbers ("25" in "2530") shows current value of laser at the time of adjustment after the latest all-initialization, 25mA in this example.The last two numbers ("30" in "2530") shows the present current value of laser, 30mA in this example.The first two numbers ("25" in "2530") usually shows current value of laser at the time of shipment, so you can see how the product has been deteriorated by comparing the first two numbers ("25" in "2530") and the last two numbers ("30" in "2530"). CD: The laser current value of 65 mA or less is normal.The laser current value of over 66 mA is not normal. Laser diode of the pickup has been deteriorated. DVD: The laser current value of 80 mA or less is normal.The laser current value of over 81 mA is not normal. Laser diode of the pickup has been deteriorated. To return to test mode, press "STOP" button of the front panel.
(No.YD002)1-23
4.4.7 Flap adjustment of the pick-up guide shaft Please perform flap adjustment of the pick-up guide shaft in the following case: · Just after you exchange the pick-up. · Just after you exchange the spindle motor. · Just after you exchange the traverse mechanism base. NOTE: Please perform flap adjustment of the pick-up guide shaft when you exchange the parts above and also when you remove the parts above. · When the reading accuracy of the signal is bad (There is a block noise in the screen, Screen stops in the outer circumference of a disc, etc.) 4.4.7.1 Tool for adjustment
* The screwdriver good on the market * Test disc part number : VT-501 *Stud part number : JIGXVS40 (Note: One of the four studs is not used here.)
* Extension cord part number : EXTXV521CB
CN706 XV-521
CN701 XV-521
XV-521 CN601
MAIN CONNECT
XV-521 CN503
CONT CONNECT
XV-521 CN502 CONT CONNECT
Used two set of this part.
1-24 (No.YD002)
MAIN CONNECT
MAIN CONNECT
CN501 XV-521
CONT CONNECT
4.4.7.2 Preparation for adjustment (1) Remove the DVD unit.(Refer to the SECTION 3 Removing the major parts) (2) Connect a extention cord between CN502 of DVD servo control board assembly and CN7301 of Main board assembly. (See Fig.4-4a) (3) Connect a extention cord between CN501 of DVD servo control board assembly and CN5302 of Regulator board assembly. (See Fig.4-4a) (4) Remove the DVD servo control board assembly attached the DVD unit. (5) Three stud is attached in a DVD unit. (See Fig.4-4b) NOTE: The connector of an extended code (right or reverse) since direction of which is also connectable, be careful of the direction which a relay wire inserts enough It will become the cause of failure if especially a Regulator board side is mistaken.
Stud DVD unit
CN502
CN501
DVD servo control board assembly
Main board assembly Regulator board assembly
Fig.4-4b
CN7301
CN7302
Fig.4-4a
4.4.7.3 Adjustment (1) Set the main body at test mode. (2) Press the "SET UP MENU" key of the remote controller three times, and the FDP is displayed "CHECK". (3) Insert a test disc (VT-501), and press the "PLAY" button of the front panel. (4) After a few seconds, press the numeric key "6" of the remote controller. Then, the FDP is displays a jitter value. (5) Turn the adjustment screws on the underside of the traverse mechanism with screw driver until the maximum jitter value is displayed on the FDP. (In this model, a bigger jitter value means a better result.) NOTE: · Reference values to judge whether the jitter is allowable or not are displayed, instead of actual jitter values. · Please be sure to perform "all-initialization" and "optimization adjustment of front end parameter" after adjusting.
Loading mechanism assembly
Screw a
Traverse mechanism assembly
Screw b
Screw c
POINT: Turn the adjustment screws a and b to the same angle in the right direction. And turn the adjustment screws a and b to the same angle in the left direction. Then, turn the screws a and b in either the right or the left direction to increase the number of jitter. Don't turn the adjustment screw c.
FDP (Example)
1241 ****
Remote controller "6" key-Jitter value
(No.YD002)1-25
SECTION 5 TROUBLESHOOTING
5.1 Manually removing the cassette tape If you cannot remove the cassette tape which is loaded because of any electrical or mechanical failures, manually remove it by taking the following steps. (1) Unplug the power cord plug from the power outlet. (2) Refer to the disassembly procedure of the VCR and perform the disassembly of the major parts before removing the mechanism assembly. (See Fig. 5-1a) (3) Unload the pole base assembly by manually turning the gear of the loading motor until the pole base assembly is hidden behind the cassette lid. In doing so, hold the tape by the hand to keep the slack away from any grease. (See Fig.5-1b ) In case of mechanical failures, while keeping the tension arm assembly free from tension, pull out the tape on the pole base assembly. Take the spring(a) of the pinch roller arm assembly off the hook, and detach it from the tape. (4) Remove the screw (a) of the side frame (L/R). (5) Hold the slack tape and cassette cover together, lift the cassette tape, top frame, cassette holder and side frames (L, R) together from the rear and remove them by dis-engaging the hooks (a) and (b).
Screw(a) Cassette tape Cassette holder Top frame Side frame(R) Screw(a)
Fig.5-1a
Tension arm assembly Pole base assembly Pinch roller arm assembly
Hook(a) Side frame(L) Hook(b)
Fig.5-1c (6) Take up the slack of the tape into the cassette. This completes removal of the cassette tape.
Spring(a)
5.2 Manually removing the disk(DVD/CD) If you cannot remove the disk which is loaded because of any electrical or mechanical failures, manually remove it by taking the following steps. (1) Unplug the power cord plug from the power outlet. (2) Remove the top cover and front panel assembly. (Refer to the disassembly procedure and perform the disassembly of the major parts before removing) (3) Turn the Middle gear (a) by hand to open the disk tray.(See Fig. 5-2a)
DVD unit Middle gear (a)
Direction of unloading
Fig.5-1b
Unloading
Fig.5-2a 1-26 (No.YD002)
5.3 Emergency display function (VHS SECTION) This unit saves details of the last two emergencies as the EMG history and allows the status of the VCR and the mechanism of each emergency to be shown both on the display and as OSD information. When using the emergency function, it is required to set the VCR to the Jig RCU mode.
Jig RCU [Data transmitting method] Depress the " " ( 3 ) button after the data code is set.
EMG display of FDP display mode (1) Transmit the code "59" from the Jig RCU. The FDP shows the EMG content in the form of "E:**:**".
E : 01
Latest EMG E:- No EMG record
INITIAL MODE CUSTOM CODE 43: A CODE DATA CODE
Fig.5-3a Jig RCU [PTU94023B] 5.3.1 Displaying the EMG information The EMG detail of information can be displayed by transmitting the code "59" from the Jig RCU. Note: · The EMG detail information <1><2> show the information on the latest EMG. It becomes " - - : - - : - - " when there is no latest EMG record.
0: 00 E: * * 1E: * * 1: * 1
Normal display EMG content display (Latest) EMG content display (Previous) See 5.3.4 See 5.3.4
(2) Transmit the code "59" from the Jig RCU again. The FDP shows the EMG detail information <1> in the form of " *1: *2 : 34 ". *1 : Deck operation mode at the moment of EMG *2 : Mechanism operation mode at the moment of EMG 3- : Mechanism sensor information at the moment of EMG -4 : Mechanism mode position at the moment of EMG (3) Transmit the code "59" from the Jig RCU once again. The FDP shows the EMG detail information <2> in the form of " *5 : *6 : *7 ". *5 : Type of the cassette tape in use <1> . *6 : Winding position of the cassette tape in use *7 : Type of the cassette tape in use <2> (Winding area) (4) Transmit the code "59" from the Jig RCU once again. The FDP shows the EMG detail information <3> in the form of "*8 : *9 : *10". *8 : Previous deck operation mode at the moment of EMG *9 : The deck operation mode of the one before the last at the moment of EMG *10: The deck operation mode of the one prior to one above at the moment of EMG (5) Transmit the code "59" from the Jig RCU once again to reset the display.
EMG detail information <1> See 5.3.5 [Deck operation mode] 2: * 2 EMG detail information <1> See 5.3.5 [Mechanism operation mode] 3: 34 EMG detail information <1> See 5.3.5 [Mechanism sensor information and Mechanism mode position] See 5.3.6 4: * 5 EMG detail information <2> [Type of the cassette tape in use <1>] See 5.3.6 5: * 6 EMG detail information <2> [Winding position of the cassette tape in use] See 5.3.6 6: * 7 EMG detail information <2> [Type of the cassette tape in use <2> (Winding area)] 7: * 8 EMG detail information <3> See 5.3.7 [Previous deck operation mode] 8: * 9 EMG detail information <3> See 5.3.7 [The deck operation mode of the one before the last] 9: * 10 EMG detail information <3> See 5.3.7 [The deck operation mode of the one prior to one above]
EMG display of 7 FDP display model Fig.5-3b
(No.YD002)1-27
5.3.2 (1) (2) (3)
Clearing the EMG history Display the EMG history. Transmit the code "36" from the Jig RCU. Reset the EMG display.
[For *HD only]
5.3.3 Details of the OSD display in the EMG display mode During the EMG display, the OSD shows the data on the deck mode, etc. The details of the display contents are as follows. Notes: · The display is variable depending on the part No. of the System Control microcomputer (IC3001) built into the VCR. In the following, refer to the figure carrying the same two characters as the top two characters of the part number of your IC. · The sensor information in the OSD display contents is partially different from the mechanism sensor information in EMG detail information <1>. [For MN* only]
AA DD GGGG I I KKKK ROM No.
BB EE HHHH JJJJ LLLL
CC FF
MMMM
AA BB
AA FF KK PP UU
BB GG LL QQ VV
CC HH MM RR WW
DD I I NN SS XX
EE JJ OO TT YY
: Key code (JVC code) : Deck operation mode(See EMG detail information <1>.) CC : Mechanism operation mode (See EMG detail information <1>.) DD : Sensor information (See sensor information details.) EE : Capstan motor speed (Search, double speed) FF : Tracking value GGGG : Cassette tape type <2>, 16 bits. (See EMG detail information <2>.) HHHH : Supply reel winding diameter data II : Capstan motor speed (FF/REW, double speed) JJJJ : Tape speed data, lower 8 bits. KKKK : General data display area LLLL : General data display area MMMM : General data display area *DD:Sensor information details
** h
AA BB CC DD EE FF GG HH II JJ KK LL MM NN OO PP YY : Deck operation mode (See EMG detail information <1>.) : Mechanism operation mode (See EMG detail of information <1>.) : Mechanism transition flag : Capstan motor control status : Loading motor control status : Sensor information (See sensor information details.) : Capstan motor speed : Key code (JVC code) : Supply reel winding diameter data higher 8 bits. : Supply reel winding diameter data lower 8 bits. : Mechanism sensor information & mechanism mode position(See EMG detail of information <1>.) : Tape speed data higher 8 bits. : Tape speed data lower 8 bits. : Cassette tape type <2> higher 8 bits. (See EMG detail of information <2>.) : Cassette tape type <2> lower 8 bits. (See EMG detail of information <2>.) : General data display area : General data display area
*
*
*
*
*
*
*
*
Encoder data (See Mechanism mode sequence.) Remote pause End sensor Start sensor Cassette tab present = 1 Cassette tab broken = 0
[For both MN*/HD*] Mechanism mode sequence
Mechanism mode - Encoder data
1 2 3 4 5 6 7 8 9 10 11
LSA LSB LSC LSD
Encoder output = Low or Trerminal - GND = SHORT Encoder output = High or Trerminal - GND = OPEN
*FF:Sensor information details
** h * * * * * * * *
No.
Encoder data (See Mechanism mode sequence.) Cassette tab present = 1 Cassette tab broken = 0 Cassette absent = 1 Cassette present = 0 Start sensor End sensor
1 2 3 4 5 6 7 8 9 10 11 12
Position EJECT EJECT1 EJECT2 ULSTOP UPPER ONSTOP(PLAY) FWD/SS REV/SS OFFSTOP FFREW-BRAKE FFREW MIDDLE
Encoder data 0 h = 0000 1 h = 0001 2 h = 0010 3 h = 0011 4 h = 0100 5 h = 0101 6 h = 0110 7 h = 0111 8 h = 1000 9 h = 1001 A h = 1010 F h = 1111
1-28 (No.YD002)
LSD LSC LSB LSA GND
5 4 3 2 1
5.3.4 EMG content description Note: EMG contents "E08/E09" are for the model with Dynamic Drum (DD).
FDP
E01: Loading EMG
CONTENT
If the mechanism mode does not change to the next mode within 4 seconds after the loading motor starts rotating in the loading direction, while the mechanism is in the after-loading position (with the tape up against the pole base), [E:01] is identified and the power is switched OFF. However, if the tape loading is not completed within 4 seconds after the loading motor starts rotating in the loading direction, the tape is simply unloaded and ejected. No EMG data is recorded in this case. When the mechanism mode cannot be changed to another mode even when the loading motor has rotated for more than 4 seconds in the unloading direction, [E:02] is identified and the power is turned off.
CAUSE
1. The mechanism is locked in the middle of the mode transition during a tape loading operation. 2. The mechanism overruns during the tape loading operation because the SYSCON cannot recognize the mechanism mode normally. This problem is due to a cause such as a rotary encoder failure. 3. Power is not supplied to the loading MDA. (M12V/Vcc/Vref/ICP are disconnected in the middle.)
E02: Unloading EMG
1. The mechanism is locked in the middle of mode transition. 2. Without an eject signal being sent from the SYSCON, unloading is attempted (i.e. Ejection is attempted while the tape is still inside the mechanism.) because the SYSCON cannot recognize the mechanism mode normally. This is due to a cause such as a rotary encoder failure. (Mechanism position: UPPER) 3. Power is not supplied to the loading MDA. (M12V/Vcc/Vref/ICP are disconnected in the middle.) 1. The take-up reel pulse is not generated in the FWD transport modes (PLAY/FWD SEARCH/FF, etc.) because; 1) The idler gear is not meshed with the take-up reel gear because the mechanism mal-functions for some reason. 2) The idler gear is meshed with the take-up reel gear, but incapable of winding due to too large mechanical load (abnormal tension); 3) The reel is rotating normally but an FG pulse is not generated due to the take-up reel sensor failure. 2. The supply reel pulse is not generated in the REV transport modes (REV SEARCH/REW, etc.) because; 1) The idler gear is not meshed with the supply reel gear because the mechanism mal-functions for some reason. 2) The idler gear is meshed with the supply reel gear, but incapable of winding due to too large a mechanical load (abnormal tension); 3) The reel rotates normally but the FG pulse is not generated due to a supply reel sensor failure. 3. Power(SW5V) is not supplied to the reel sensor on the tape winding side.
E03: Take Up Reel Pulse EMG
When the falling edje of the take-up reel pulse has not been generated for more than 4 seconds in the capstan rotating mode, [E:03] is identified, the pinch rollers are turned off and stopped, and the power is turned off. In this case, however, the mechanism should be in position after tape loading. Note that the reel EMG is not detected during Slow/Frame advance operations.
E04: Drum FG EMG
When the drum FG pulse has not been input for more than 3 seconds in the drum rotating mode, [E:04] is identified, the pinch rollers are turned off and stopped, and the power is turned off.
1. The drum could not start or the drum rotation has stopped due to too large a load on the tape, because; 1) The tape tension is abnormally high; 2) The tape is damaged or a foreign object (grease, etc.) adheres to the tape. 2. The drum FG pulse did not reach the System controller CPU because; 1) The signal circuit is disconnected in the middle; 2) The FG pulse generator (hall device) of the drum is faulty. 3. The drum control voltage (DRUM CTL V) is not supplied to the MDA. 4. Power (M12V) is not supplied to the drum MDA. 1. The cassette cannot be ejected due to a failure in the drive mechanism of the housing. 2. When the housing load increases during ejection, the loading motor is stopped because of lack of headroom in its drive torque. Housing load increasing factors: Temperature environment (low temperature, etc.), mechanism wear or failure. 3. The sensor/switch for detecting the end of ejection are not functioning normally. 4. The loading motor drive voltage is lower than specified or power (M12V) is not supplied to the motor (MDA). 5. When the user attempted to eject a cassette, a foreign object (or perhaps the user's hand) was caught in the opening of the housing. 1. The capstan could not start or the capstan rotation has stopped due to too large a load on the tape, because; 1) The tape tension is abnormally high (mechanical lock); 2) The tape is damaged or a foreign object (grease, etc.) is adhered to the tape (occurrence of tape entangling, etc.). 2. The capstan FG pulse did not reach the System controller CPU because; 1) The signal circuit is disconnected in the middle; 2) The FG pulse generator (MR device) of the capstans is faulty. 3. The capstan control voltage (CAPSTAN CTL V) is not supplied to the MDA. 4. Power (M12V, SW5V) are not supplied to the capstan MDA. 1. The SW 5 V power supply circuit is shorted with GND. 2. The SW 12 V power supply circuit is shorted with GND. 1. The absolute value sensor is defective. (The soldered parts have separated.) 2. The pull-up resistor at the absolute sensor output is defective. (The soldered parts have separated.) 3. Contact failure or soldering failure of the pins of the connector (board-to-board) to the absolute value sensor. 4. The absolute value sensor data is not sent to the System Controller CPU. 1. 2. 3. 4. 5. 6. 7. 8. 9. The FG sensor is defective. (The soldered parts have separated.) The pull-up resistor at the FG sensor output is defective. (The soldered parts have separated.) Contact failure or soldering failure of the pins of the connector (board-to-board) to the FG sensor. The power (5V) to the sensor is not supplied. (Connection failure/soldering failure) The FG pulse is not sent to the System Controller CPU. The tilt motor is defective. (The soldered parts have separated.) The drive power to the tilt motor is not supplied. (Connection failure/soldering failure) The tilt motor drive MDA - IC is defective. Auto-recovery of the DD tilting cannot take place due to overrun.
E05: Cassette Eject EMG
If the cassette does not reach the eject position within about 0.7 seconds after the cassette housing has started the cassette ejection operation, [E:05] is identified, the drive direction is reversed to load the tape, the mode is switched to STOP mode with the pinch roller OFF, and the power is switched OFF. During the cassette insertion process, the drive direction is reversed and the cassette is ejected if the tape is not up against the pole base within about 3 seconds after the start of the cassette pullingin operation. If the cassette does not reach the eject position within about 0.7 seconds after the drive mode reversal operation, [E:05] is identified and the power is switched OFF immediately. When the capstan FG pulse has not been generated for more than 1 second in the capstan rotating mode, [E:06] is identified, the pinch rollers are turned off and stopped, and the power is turned off.However, the capstan EMG is not detected in SLOW/ STILL modes. Note that, if the part number of the System Control IC begins with "MN" or "M3", the capstan EMG is not detected even during the FF/REW operation.
E06: Capstan FG EMG
E07: SW Power Short-Circuit EMG E08: DD Initialized (Absolute Position Sensor) EMG DD FG EMG
When short-circuiting of the SW power supply with GND has lasted for 0.5 second or more, [E:07] is identified, all the motors are stopped and the power is turned off. Wh