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MECHANICAL ADJUSTMENTS
CONTENTS
2.1 BEFORE ADJUSTMENTS ...........................................................................................................2-1 2.1.1 2.1.2 2.1.3 2.2 Precautions ......................................................................................................................2-1 Measuring instruments required for adjustments.............................................................2-1 Equipment required for adjustments ................................................................................2-1
DISASSEMBLY/ASSEMBLY OF THE MECHANISM ..................................................................2-2 2.2.1 2.2.2 Mechanism position for disassembly/assembly ...............................................................2-2 Mode transition.................................................................................................................2-2
2.3 2.4
MECHANISM TIMING CHART .....................................................................................................2-3 MAINTENANCE AND INSPECTION OF MAJOR PARTS ...........................................................2-4 2.4.1 2.4.2 2.4.3 2.4.4 Layout of Major Parts .......................................................................................................2-4 Maintenance/inspection table...........................................................................................2-5 Cleaning ...........................................................................................................................2-6 Oiling and Greasing .........................................................................................................2-6
2.5 2.6 2.7 2.8 2.9
PERIODICAL MAINTENANCE .....................................................................................................2-7 REPLACEMENT OF MAJOR PARTS ..........................................................................................2-8 GUIDE ROLLER REPLACEMENT METHOD ..............................................................................2-24 TORQUE ADJUSTMENT .............................................................................................................2-25 INTERCHANGEABILITY ADJUSTMENT .....................................................................................2-27 2.9.1 2.9.2 2.9.3 Interchangeability adjustment flow chart..........................................................................2-27 Tape Transport Restriction...............................................................................................2-28 Interchangeability adjustment ..........................................................................................2-29
SECTION 2 MECHANICAL ADJUSTMENTS
2.1 BEFORE ADJUSTMENTS 2.1.2 Measuring instruments required for adjustments Instrument Oscilloscope Condition Calibrated instrument with measuring bandwidth of 100 MHz or more. Table 2-1-1
2.1.1 Precautions 1) Be sure to apply a screw securing torque when attaching a part. The securing torque should be 0.14 N/m (1.4 kgf/cm) unless otherwise specified. 2) Always unplug the power cord of the set before attaching, removing or soldering a part. 3) When unplugging a connector, do not pull the wire but grasp the connector body. 4) Do not make an adjustment or rotate a potentiometer blindly while the source of trouble is not identified. 5) Before adjusting electrical circuitry, be sure to wait for more than 10 minutes after turning the power on.
2.1.3 Equipment required for adjustments
1
Alignment tape
4
Torque screwdriver
VFK1845
VFK1842
VFK1209
Replaceable bit (long type)
2
Cassette torque meter
5
REWRITE board (Connector board)
VFK1843 for FWD mode VFK1844 for REV mode
VFK1846
3
Post driver
VFK1149
Table 2-1-2
2-1
2.2
DISASSEMBLY/ASSEMBLY OF THE MECHANISM 2.2.2 Mode transition To change the mechanism mode manually, rotate the emergency gear of the mode motor assembly shown in Fig. 2.2.1 as below while holding it down. The mechanism mode can be changed by applying 3 V DC to the mode motor electrodes. The MINI and STD reel positions can be changed over by manually sliding the reel change plate.
2.2.1 Mechanism position for disassembly/assembly The mechanism should basically be disassembled and assembled in the unloading end (No Cassette) position. However, other mechanism position is sometimes required for disassembly or assembly. In such a case, the required position is specified every time in the descriptions in 2.6, "Replacement of major parts".
Emergency gear (Mode motor) : Loading direction : Unloading direction
Black wire
DC 3 V
Red wire Red for loading Red + for unloading
MINI
Reel change plate
STD
Fig. 2.2.1 Important: When turn the Emergency gear (Mode) to Unloading direction by hand until the hole of the Main cam and the hole of the pinch cam in a straitline connecting. (refer to Fig.2.2.2) Please do not turn the Emergency gear (Mode) more than the above.
Pinch cam Main cam
Fig. 2.2.2
2-2
EJECT, UNLOAD
BRAKE
FF/REW
STBY-OFF
PLAY, REC, STBY-ON, SEARCH
ON POLE BASE OFF ON PINCH ROLLER OFF ON2 ON1 OFF2 OFF1 STOP TEN. SPRING (S) FWD FF REV TEN. SPRING (T) STOP REW ON REEL BRAKE (S) OFF ON REEL BRAKE (T) OFF
TENSION ARM
MECHANISM TIMING CHART
SENSOR output
See Table 2-3-1 below.
2.3
Table 2-3-1
2-3
2.4 MAINTENANCE AND INSPECTION OF MAJOR PARTS Periodical inspection and maintenance are requisite to maintain the initial performance and reliability of the product. Table 2-4-1 (Maintenance & Inspection List) has been compiled assuming standard operating conditions, and the specifications in the table are greatly variable depending on the actual operating environment and conditions. Remember that, if the maintenance and inspection are not enforced properly, the operating hours of the product will not only reduce considerably but other unfavorable influences may produce. Rubber parts may deform or degrade after long period of storage even if they are not used in this period. The service life of the drum is variable depending on the tape used and operating environment.
2.4.1 Layout of Major Parts
5
6
7
4
34
36
1
2
3
26
27
35 37 D 29 38 28 12 17 41 C 14 18 10 A D
16
21
11
43
42
Fig. 2.4.1
2-4
2.4.2 Maintenance/inspection table 1)Replace the whole mechanism assembly in the 6000H maintenance. 2)The SUP/TU tension arm assemblies, sub-deck assembly (ENT. G. roller section) and EGR ARM assembly have undergone perpendicularity management after being assembled. If any of the above assemblies needs replacement, the whole mechanism assembly should be replaced.
Part Name
1 2 3 4 5 6 7 8 9 10 11 12
Symbol No. M 3 66 M 3 67 M 3 30 M 3 31 M 3 32 M3
4
Operating Hours (DRUM Hour Meter)
500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000
Ref. Section
2.6.17 2.6.17 2.4.1 2.4.1 2.4.1 2.6.3 2.6.2
13 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35
° · Î Î Î 3 2 / 0 0 e ! Ç 4 6 7 5 ¢ fl · ¶ § q w & * ^ @ $ ! 1 i Å
SUP P. BASE ASSEMBLY TU P. BASE ASSEMBLY GUIDE ROLLER COLLER FRANGE PINCH R.ARM ASSEMBLY DRUM ASSEMBLY CAPSTAN SHAFT CAPSTAN MOTOR REEL MOTOR M.I.C. terminal M.I.C. CONNECTOR FPC 1 ASSEMBLY IDLER COVER CASSETTE GUIDE PIN MODE MOTOR ASSEMBLY MAIN CAM GEAR 1 GEAR 2 WORM WHEEL PINCH CAM GEAR PINCH PLATE CTL. PLATE CTL. ARM ASSEMBLY ARM GEAR SUP REEL PLATE ASSEMBLY TU REEL PLATE ASSEMBLY SUP REEL DISK ASSEMBLY TU REEL DISK ASSEMBLY CONN. GEAR ASSEMBLY SUP TENSION BAND ASSEMBLY TU TENSION BAND ASSEMBLY IDLER ARM ASSEMBLY HEAD CLEANAER CASSETTE HOUSING ASSEMBLY MECHANISM ASSEMBLY
M 3 80 M 3 64 M 3 64 M 3 24 M 3 51 M 3 51 M 3 49 M 3 52 M 3 47 M 3 12 M 3 44 M 3 45 M 3 46 M 3 13 M 3 17 M3
9
¤ ¤ ¤ ¤ ¤ ¤ ¤ ¤
-- --
R¤ R¤ R¤ R¤ R¤ R¤
¤ ¤
-- --
¤ ¤ ¤ ¤ ¤ ¤ ¤ ¤
-- --
r r r r r r r
¤
-- --
¤ ¤ ¤ ¤ ¤ ¤ ¤ ¤
-- --
R¤ R¤ R¤ R¤ R¤ R¤
¤ ¤
-- --
¤ ¤ ¤ ¤ ¤ ¤ ¤ ¤
-- --
r r r r r r r
¤
-- --
¤ ¤ ¤ ¤ ¤ ¤ ¤ ¤
-- --
R¤ R¤ R¤ R¤ R¤ R¤
¤ ¤
¤ ¤ ¤ ¤ ¤ ¤ ¤ ¤
-- --
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
R R
2.6.16 2.6.13
¤
--
¤
--
¤
--
¤
--
¤
--
¤
--
¤
--
¤
--
¤
--
¤
--
¤
--
¤
--
¤
--
¤
--
¤
--
¤
--
¤
--
¤
--
¤
--
¤
--
¤
--
¤
--
2.6.6 2.6.25 2.6.7 2.4.1 2.6.4 2.6.20 2.6.4 2.6.4 2.6.4 2.6.20 2.6.16 2.6.22 2.6.21 2.6.21 2.6.24 2.6.24 2.6.10 2.6.10 2.6.10 2.6.8 2.6.9 2.6.7 2.6.2 2.6.1
¤
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
¤
-- -- -- -- -- -- -- -- -- -- -- --
¤
-- -- -- -- -- -- -- -- -- -- -- -- -- --
¤
-- -- -- -- -- -- -- -- -- -- -- --
¤
-- -- -- -- -- -- -- -- -- -- -- --
¤
-- -- -- -- -- -- -- -- -- -- -- --
¤
-- -- -- -- -- -- -- -- -- -- -- -- -- --
¤
-- -- -- -- -- -- -- -- -- -- -- --
¤
-- -- -- -- -- -- -- -- -- -- -- --
¤
-- -- -- -- -- -- -- -- -- -- -- --
¤
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
M 3 56 M 3 11 M 3 54 M 3 55 M 3 35 M 3 36 M 3 37 M 3 38 M 3 39 M 3 40 M 3 5A M 3 90 M3 1
R
-- --
R R R R R R r
-- --
r^ -- r^ -- -- r^ -- -- r -- -- r -- -- r R R r --
-- -- -- -- --
R R R R R R r
-- --
r^ -- r^ -- -- r^ -- -- r -- -- r -- -- r -- R r R
-- -- -- -- -- --
R R R R R R r
-- --
R
-- --
r
¤: Clean with ethyl alcohol. R: Check and replace if required. r: Replace. ^: Oil the shaft. After replacing a part, apply lubricant to the required points.
Table 2-4-1
2-5
2.4.3 Cleaning The tape transport system should be cleaned periodically. Be sure to clean the tape transport system upon receipt of a set for servicing, etc. To clean use a cleaning cloth moistened with ethyl alcohol. 1) When the video head is stained, the playback output level decreases and a read error will not be able to be corrected by the error correction. If this occurs, block noise appear on the monitor, the audio will not be output, and the video output will eventually be lost when the video head becomes extremely dirty. To clean the drum, while applying cleaning cloth (service part No. : VZZ0095) or high quality paper gently to the upper drum, rotate the upper drum in the normal (counterclockwise) rotation direction. The dirt deposited on the video head can be removed by playing a cleaning tape. CAUTION Do not move the cleaning paper while applying it to the video head. Otherwise, the video head may be damaged.
3) Stain of the tape transport system leads to tape damage. When magnetic dust or dirt penetrates inside the rollers, a rotation malfunction may affect the video. Clean the tape transport parts carefully using a cleaning cloth or cotton swab moistened with ethyl alcohol.
Take special care.
Fig. 2.4.3
2.4.4 Oiling and Greasing Table 2-4-2 shows the oil and greases used with the set. Classification Oil Grease Name Cosmo Hydro HV100 Maltemp SH-P Table 2-4-2 Part No. VFK1778 VFK1748
2) The lower drum tends to attract dirt on the leader section and the linearity cannot be guaranteed when the lower drum becomes extremely dirty. Particularly, the tape inlet and output sections gather dirt easily, causing symptoms such as dropout of the reproduced FM signal, deterioration of video quality and lack of audio output. In order to clean the leader section, rub a toothpick gently along its edge.
High-quality paper Upper drum Head tip
Apply lightly.
Core drum
Carefully clean the lead tape inlet/outlet.
1) Oiling should be performed periodically. Oil the shafts by referring to the maintenance table. 2) After replacing a part, grease the required points. For the parts to be greased see the exploded diagram in section 6, "EXPLODED VIEWS & REPLACEMENT PARTS LIST". 3) As Hanal separates over time, be sure to mix it (shake) well before use. 4) Take care not to leave grease or oil on the tape transport parts which come into contact with the tape or on the brake pads. 5) Take care not to apply too much oil or grease. The standard oiling quantity is one drop and the standard greasing quantity is the quantity with which the grease does not overflow.
Toothpick
Lead Lower drum
Fig. 2.4.2
2-6
2.5
PERIODICAL MAINTENANCE
Perform maintenance at the correct times in accordance with the maintenance table. Fig. 2-5-1 shows the flow chart of periodical maintenance procedures at different operating hours.
Every 2000-hour maintenance
6000-hour maintenance
Start
Start
Replaced parts ° SUP. Pole Base assembly · TU Pole Base assembly Î Guide roller Î Coller Î Frange 3 Pinch roller arm assembly 2 Drum assembly & SUP R. disk assembly * TU R. disk assembly ^ CONN. gear assembly @ SUP tension band assembly $ TU tension band assembly ! Idle arm assembly 1 Head cleaner
Replaced parts Mechanism assembly (including Drum assembly and Cassette housing assembly)
2.8 Toeque adjustment
2.9 Interchangeability adjustment
3.2.1 PB switching point adjustment
2.6.8 SUP. TEN. BAND adjustment
3.2.3 ME SP VCO OFFSET adjustment
2.6.9 TU. TEN. BAND adjustment End
2.8 Toeque adjustment
2.9 Interchangeability adjustment
3.2.1 PB switching point adjustment
3.2.3 ME SP VCO OFFSET adjustment
End
Fig. 2.5.1
2-7
No.
Item
Ref. Illustration
Procedure
2.6 REPLACEMENT OF MAJOR PARTS ! The disassembly procedures shown in oder of disassembly. To remove the part, it is necessary to have completed all the stages before it. ! Always use a torque driver and the specified securing torque to tighten screws. ! Position the mechanism to the unloading end (No Cassette) mode before disassembly or assembly unless otherwise specified. 1
i Cassette housing assembly
Cassette housing assembly Manually perform the loading operation so that the cassette holder bar comes on the position of this screw. Cassette holder bar Hold this part when removing or attaching the assembly.
Cassette holder
(S1)
(S1) 1
1)Turn the cassette housing motor emergency gear in the direction of the arrow, while pushing the lock lever in the direction of arrow 2, then move the cassette holder so that the cassette holder bar comes in the position shown in the illustration. 2)Remove two screws (S1), slide the cassette housing toward the front and remove it by releasing the lock on the Hook function as shown by arrow 3. 1)Reverse the disassembly procedure. 2)Screws (S1) should be tightened using a securing torque of 0.2 N/m (2 kgf/cm). Note: Be sure to attach the cassette housing in the same position as when it was removed.
2
Hook
3
Look lever Hook
Cassette Housing Motor Emergency Gear
3
(OK)
(NG)
Hook function of the Cassette hausing. Fig. 2.6.1 2
1 Head cleaner assembly/ 2 Drum assembly
(S3) 2 (S3) 3 (S3) 1 (S2)
Head cleaner assembly
Head cleaner assembly: 1) Remove the screw (S2) and remove the head cleaner assembly. Drum assembly: 1) Remove the Drum FPC from the DV/CPU circuit board CN107. 2) Remove the screw (S3) and remove the drum assembly. 1) Reverse the disassembly procedure. 2) Drum section screws (S3) should be tightened in order of 1 -- 3 and using a securing torque of 0.04 N/m (0.4 kgf/cm).
Drum assembly
Fig. 2.6.2 2-8
No.
Item
Ref. Illustration
Procedure
3
3 Pinch roller arm assembly
Pinch roller arm assembly
1) While pushing the hook on the pinch plate, lift the pinch roller arm assembly upward to remove. 1) Reverse the disassembly procedure.
Pinch plate
Please pay attention not to damage these roller part.
Remove while pushing this part.
Fig. 2.6.3 4
4 Mode motor assembly/ 5 Worm wheel 2/ 6 Gear 1/ 7 Gear 2
(S2)
Mode motor assembly: 1) Remove the screw (S2) and remove the mode motor assembly. Worm wheel 2 & gears 1 and 2: 1) Lift the worm wheel 2 upward to remove. 2) Lift the gear 1 upward to remove. 3) Lift the gear 2 upward to remove. 1) Reverse the disassembly procedure. Note: Worm wheel 2 and gears 1 and 2 do not require the mechanism phase adjustment.
Mode motor assembly Worm wheel 2 Gear 1 Gear 2
Fig. 2.6.4 2-9
No.
Item
Ref. Illustration
Procedure
5
Cassette guide assembly/ M.I.C guide
(S1)
Cassette guide assembly
Cassette guide assembly: 1)Remove the screws (S1) (S4) and remove the cassette guide assembly. M.I.C guide: 1)While pushing the hook on the M.I.C guide, lift it upward to remove. 1)Reverse the disassembly procedure.
M.I.C guide
(S4)
Fig. 2.6.5
6
10 M.I.C connector
(W1)
M.I.C connector
(P1)
1)Slide the reel change plate in the direction of arrow 1 to place the reel in the mini-cassette position. 2)Remove the slit washer (W1) and remove the M.I.C connector. 3)Remove the spring (P1). 1)Reverse the disassembly procedure.
1
Reel change plate
Fig. 2.6.6 (1) 2-10
Fig. 2.6.6 (2)
No.
Item
Ref. Illustration
Procedure
7
! Idler arm assembly
(S2) (S2)
Idler cover
1) Remove the two screws (S2) and remove the idler cover. 2) Remove the idler arm. 3) Remove the emergency gear. 4) Remove the spring (P2). 1) Attach the Idler arm and the Emergency gear into the Idler cover.
Emergency gear Idler arm
(P2)
2 Rotate the Idler arm to the clockwise direction.
(Check the Idler arm moves smoothly.)
1 Insert a point
of the Idler arm
3 Install the Emergency gear into
the Idler cover and push it lightly.
Fig. 2.6.7 2) Attach the Idler arm assembly onto the Main deck.
4 Hook to the
shaft of the Main deck.
1 Hook to the
shaft of the Main deck.
5 Fit to the
boss of the Main deck.
2 Fit to the boss of
the Main deck.
3 Rotate the Emergency gear with screw drive
then fit the gear of the Idler arm and the Reel Motor gear.
Caution : When install the Idler arm assembly into the main deck, if the gear of the Idler arm and Reel Motor gear does not fit, these geare may damaged.
2-11
No.
Item
Ref. Illustration
Procedure
8
12
Supply tension band assembly/ Supply tension arm assembly
(W2)
Supply tension band assembly
1
Plate section
(P3)
Supply tension arm assembly
Supply tension band assembly: 1) Remove the slit washer (W2). 2) Slide the tension band plate in the direction of arrow 1 and remove the plate from the tension arm stud section. Supply tension arm assembly: 1)Remove the slit washer (W3) and remove the supply tension arm assembly. 2)Unhook the spring (P3) from the tension control arm. (See Fig. 2.6.8 (3)) 3)Remove the spring (P4). 1)Reverse the disassembly procedure. Notes: · Pinch the tension band plate and tension arm stud together and fix them. Be careful not to bend the plate during the above. (See in Fig. 2.6.8 (2)) · The supply tension arm assembly has undergone perpendicularity management after being assembled, so when replacement is required, it will be necessary to replace the entire mechanism assembly.
Tension control arm
(W3)
Stud section
(P4)
Fig. 2.6.8 (1)
Tension band plate
Stud
Hook for spring (P3)
Fig. 2.6.8 (2)
Fig. 2.6.8 (3) 1)With the cassette housing removed, place the reel in the mini-cassette position. (See Fig. 2.6.6 (2)) 2)Manually rotate the emergency gear of mode motor counterclockwise (See section 2.2.2, "Mode transition".) to perform loading untill the loading end position. 3)Confirm that the right edge of the tension arm is placed within the range of reference hole A on the sub-deck. 4)If the right edge is not within the above range, adjust by turning the adjust pin. : to lower limit Clockwise rotation Counterclockwise rotation : to upper limit [Loading end position] Perform loading until SUP REEL lock and TU REEL lock are completely separated from REEL disks.
A
SUP tension arm
OK (Lower limit)
SUP tension band assembly
Counterclockwise OK (Center) Clockwise
Adjust pin
OK (Upper limit)
Reel disk
Fig. 2.6.8 (4) 2-12
No.
Item
Ref. Illustration
Procedure
9
14
Take-up tension band assembly/ Take-up tension arm assembly
(W2)
TU tension band assembly
1
Plate section
Take-up tension band assembly: 1)Remove the slit washer (W2). 2)Slide the plate section of tension band in the direction of arrow 1 and remove the plate from the tension arm stud. Take-up tension arm assembly: 1)Remove the slit washer (W3) and remove the supply tension arm assembly. 2)Unhook the spring (P3) from the tension control arm. (See Fig. 2.6.9 (3)) 3)Remove the spring (P4). 1)Reverse the disassembly procedure. Notes: · Pinch the tension band plate and tension arm stud together and fix them. Be careful not to bend the plate during the above. (See in Fig. 2.6.8 (2)) · The take-up tension arm assembly has undergone perpendicularity management after being assembled, so when replacement is required, it will be necessary to replace the entire mechanism assembly.
Tension control arm Hook for spring (P3)
(W3) (P3)
TU tension arm assembly
(P4)
Fig. 2.6.9 (1)
Tension band plate
Stud
Fig. 2.6.9 (2)
A
Fig. 2.6.9 (3) 1)With the cassette housing removed, place the reel in the mini-cassette position. (See Fig. 2.6.6 (2)) 2)Manually rotate the emergency gear of mode motor counterclockwise (See section 2.2.2, "Mode transition".) to perform loading untill the loading end position. 3)Canfirm that the left edge of the tension arm is placed within the range of notch A on the sub-deck. 4)If the left edge is not within the above range, adjust by turning the adjust pin. Clockwise rotation : to upper limit Counterclockwise rotation : to lower limit [Loading end position] Perform loading until SUP REEL lock and TU REEL lock are completely separated from REEL disks.
OK (Upper limit)
TU tension arm
OK (Lower limit)
Tension band assembly
Counterclockwise OK (Center) Clockwise
Adjust pin
Reel disk
Fig. 2.6.9 (4) 2-13
No.
Item
Ref. Illustration
Procedure
10
^ CONN gear assembly/ & SUP reel disk assembly/ * TU reel disk
assembly
SUP reel disk assembly
CONN. gear assembly 1) Lift the two CONN gears upward to remove.
(W2) (W2)
TU reel disk assembly
(W6)
(W6)
CONN. gear
SUP and TU reel disk assemblies: 1) Remove the two slit washers (W2) and lift the SUP and TU reel disk assemblies separately to remove each assembly. 2) Lift the two washers (W6) to remove. 1) Reverse the disassembly procedure.
Cosmo Hydro HV100 See M 3 in section 5
Fig. 2.6.10
11
M.C.B pin
(S2)
M.C.B pin
1) Remove the screw (S2) and remove the M.C.B pin. 1) Reverse the disassembly procedure.
Fig. 2.6.11
2-14
No.
Item
Ref. Illustration
Procedure
12
Switch lever
(P5)
1) Unhook the spring (P5). 2) Slide the switch lever in the direction of the arrow and then lift it upward to remove. 1) Reverse the disassembly procedure.
Switch lever
Fig. 2.6.12
13
/ Reel motor
1) Remove the FFC from the mechanism circuit board CN124. 2) Remove the three screws (S2) and remove the reel motor. 1) Reverse the disassembly procedure. 2) Tighten the three screws (S2) in the order of 3.
1-
Note: Be sure to have the FFC cable installed on the reel motor side before attaching.
FFC cable Reel motor
(S2) 3
(S2) 1
(S2) 2
Fig. 2.6.13
2-15
No.
Item
Ref. Illustration
Procedure
14
F-lock lever
1) Slide the F-lock lever in the direction of the arrow to remove. 1) Reverse the disassembly procedure.
F-lock lever
Long Hole Cross-section Multemp SH-P See M 3 in section 5.
Fig. 2.6.14
15
Dew sensor/ E.G. roller arm assembly
Dew sensor: 1) Remove the screw (S5) and remove the DEW sensor.
(S5) (S2)
E.G. roller arm assembly
E.G. roller arm assembly: 1) Remove the screw (S2) and remove the E.G. roller arm assembly. 1) Reverse the disassembly procedure.
DEW sensor
Note: The E.G. roller arm assembly has undergone perpendicularity management after being assembled, so when replacement is required, it will be necessary to replace the entire mechanism assembly.
Fig. 2.6.15
2-16
No.
Item
Ref. Illustration
Procedure
16
Sub-deck/ fl Pinch plate/ Capstan motor
Sub-deck
Pinch plate
Sub-deck/pin plate: 1) Remove the three screws (S2) and slide the subdeck in the direction of arrow then remove it. The pinch plate also detaches at this time. Capstan motor: 1) Remove the two screws (S6) and remove the capstan motor. Do this procedure in the unloading end position. 1) Fit the groove on the rear of the pinch plate into the boss on the main deck. 2) Reverse the disassembly procedure. 3) Attach the loading gear and arm gear so that the phase relationship between them is as shown in the figure.
(S2) 1 (S2) 3
(S6) 1 (S6) 2
(S2) 2
Capstan Motor
Boss
Arm gear
Fig. 2.6.16 (1)
Loading gear Attach so that the phase holes face each other.
-- Unloading End Position --
Groove
Fig. 2.6.16 (2)
Notes: · Tighten the screws (S2) of the sub deck in the order of 1 - 3. · The sub deck assembly has undergone perpendicularity management after being assembled, so when replacement is required, it will be necessary to replace the entire mechanism assembly. · Capstan motor screws (S6) should be tightened in the order of 1 - 2 and using a securing torque of 0.20 N·m (2 kgf·cm).
2-17
No.
Item
Ref. Illustration
Procedure
17
° Supply pole base assembly/ · Take-up pole base assembly
SUP pole base assembly TU pole base assembly
Do this procedure in the loading end position. Supply pole base assembly: 1) Remove the two slit washers (W4) and remove the supply pole base assembly. Take-up pole base assembly: 1) Remove the two slit washers (W4) and remove the take-up pole base assembly. 1) Reverse the disassembly procedure.
(W4) (W4)
SUP loading arm assembly
(W5) (W4)
(W4)
TU loading arm assembly
Fig. 2.6.17
18
Supply loading arm assembly/ Take-up loading arm assembly
Do this procedure in the loading end position. Take-up loading arm assembly: 1) Remove the slit washer (W5) and remove the takeup loading arm assembly. Supply loading arm assembly: 1) After removing the take-up loading arm assembly, remove the supply loading arm assembly. 1) Reverse the disassembly procedure. 2) Attach so that the gear holes on the assemblies face each other.
Fig. 2.6.18 Sub Deck Bottom Side
2-18
No.
Item
Ref. Illustration
Procedure
19
Supply reel lock/ Take-up reel lock
(P6)
Take-up reel lock
Supply reel lock: 1) Unhook the spring (P6) and lift the supply reel lock upward to remove. Take-up reel lock: 1) Unhook the spring (P6) and lift the take-up reel lock upward to remove. 1) Reverse the disassembly procedure.
(P6)
Supply reel lock
Supply side spring (P6) hook position
Take-up side spring (P6) hook position
Fig. 2.6.19
20
¢ Pinch cam gear/ Main cam
(S2)
Main cam Pinch cam gear Rear Side Cam Slot Multemp SH-P See M 3 in section 5.
Pinch cam gear: 1) Lift the pinch cam gear upward to remove. Main cam: 1) Remove the screw (S2) and remove the main cam. 1) Reverse the disassembly procedure. 2) Attach the main cam and pinch cam gear so that their phase relationship is as shown in the figure.
Fig. 2.6.20 (1)
Fig. 2.6.20 (2)
2-19
No.
Item
Ref. Illustration
Procedure
21
§ Arm gear/ ¶ Control arm
Control arm Arm gear
Arm gear: 1) Remove the main cam as described in No. 20 and remove the arm gear. Control arm: 1) Place the main deck upside down. 2) Bend the control plate slightly, disengage the control arm's stud from the groove on the plate and remove the control arm. (Refer to Fig. 2.6.21(2)) 1) Reverse the disassembly procedure. 2) Align the hole on the control arm withy that on the main deck. 3) Align the hole on the arm gear with that on the main deck.
Multemp SH-P See M 3 in section 5. Stud
Fig. 2.6.21 (1)
Control plate
Hole on the control arm
Control arm Stud
Arm gear
While raising this end, remove by pulling out the studs of the control arm.
Fig. 2.6.21 (2) Fig. 2.6.21 (3) 22
· Control plate/ Mode sensor gear
Control plate: 1) Place the main deck upside down. 2) Slide the control plate in the direction of the arrow 1 to remove. Mode sensor gear: 1) Remove the mode sensor gear as if pulling it out. 1) Attach the control plate. 2) Slide the control plate in the direction of the arrow 2. 3) Attach the mode sensor gear so that the hole on it is aligned with that on the control plate.
Mode sensor gear
Mode Sensor Gear
2
Control plate
Control Plate
1
Attach in position where holes are facing each other.
Fig. 2.6.22 (1) 2-20
Fig. 2.6.22 (2)
No.
Item
Ref. Illustration
Procedure
23
Leaf plate
Leaf plate
1
2
1) Push the supply side of the leaf plate in the direction of arrow 1 to release the lock. 2) Push the take-up side of the leaf plate in the direction of arrow 2 to release the lock. Now the leaf plate can be removed. 1) Reverse the disassembly procedure.
Note: Be careful not to deform the leaf plate during removing or attaching.
Fig. 2.6.23
24
q Supply reel plate/ w Tale-up reel plate
Multemp SH-P See M 3 in section 5.
TU real plate SUP real plate
Supply reel plate: 1) Slide the reel change plate toward the mini-cassette position. (Stop sliding before it is locked completely.) (See Fig. 2.6.6 (2)) 2) Lift the right side of the supply reel plate (gear side) and turn it slightly to remove. Take-up reel plate: 1) Lift the left side of the take-up reel plate and turn it slightly to remove. 1) Reverse the disassembly procedure. Notes: Take-up reel plate attaching position Attach the take-up reel plate so that the gear cogs on its inner right side are meshed with those on the left end of the reel plate drive gear. Supply reel plate attaching position Attach the supply reel plate so that the gear cogs on its inner right side are meshed with those on the left end of the supply reel plate.
SUP reel plate TU reel plate
Fig. 2.6.24 (1)
Fig. 2.6.24 (2) 2-21
No.
Item
Ref. Illustration
Procedure
25
e FPC1 assembly
Idler cover
Match the hole to the boss of an idler cover. M.I.C connector
1) Remove the M.I.C connector and idler arm assembly as described in section 2.6.7. 2) Remove solder from the M.I.C connector (6 positions). 3) Remove the FPC1 assembly by performing the same operation as peeling adhesive tape off for the idler cover section. 1) Reverse the disassembly procedure.
FPC1 Soldering on the reverse.
Note: Do not reuse the removed FPC1 assembly.
Fig. 2.6.25
26
FPC2 assembly/ FPC3 assembly
FPC2 assembly: 1) Remove solder from CN126 on the mechanism board. 2) Remove the FPC2 assembly as if peeling adhesive tape off. FPC3 assembly: 1) Remove solder from CN127 on the mechanism board. 2) Remove the FPC3 assembly as if peeling adhesive tape off.
FPC2
1) Reverse the disassembly procedure. Note: Do not reuse the removed FPC1 and FPC2 assemblies.
CN127
FPC3
Fig. 2.6.26 (1)
CN126
Fig. 2.6.26 (2) 2-22
No.
Item
Ref. Illustration
Procedure
27
Cassette LED/ LED holder/ MECHA board assembly
Cassette LED and LED holder
Cassette LED: 1) Remove solder from LD1 on the mechanism board and remove the cassette LED. LED holder: 1) While pushing the three claws locking the LED holder, remove it. MECHA board assembly: 1) Remove the seven screws (S2) and a screw (S3), then remove the MECHA board assembly. 1) Reverse the disassembly procedure. 2) Tighten the eight screws of the mechanism board assembly in the order shown in the illustration.
(S2)
MECHA board
5
(S3) (S2) (S2)
4
6
(S2)
LED holderlock section
Fig. 2.6.27 (1)
LD1
8
1
3
2
7
Fig. 2.6.27 (2) -- Mechanism unit bottom side --
Note: Makce sure the three claws locking of the LCD holder does not loosen.
2-23
No.
Item
Ref. Illustration
Procedure
2.7
GUIDE ROLLER REPLACEMENT METHOD
Since the SUP/TU tension arm assembly, sub deck assembly (ENT, G, roller section), and E.G.R. arm, have all undergone perpendicularity management after being assembled respectively, assembly replacement of these is not possible. For maintenance, only the guide roller can be replaced. 1
Î Guide roller replacement procedure for SUP/TU tension arm assembly and ENT.G. roller/E.G. roller arm assembly
1)Remove the flange on the upper part of the guide roller as you would remove a screw. 2)Pull the guide roller upward and remove it. 3)Pull the collar upward and remove it. 1)Proceed in the reverse order as when removing. 2)When fixing the flange in place, first tighten by hand until it stops, then tighten further using a securing torque of 0.04 N/m (0.4 kgf/cm). 3)After fixing in place, apply screw sealant to the screw on the upper end of the flange. Note: When applying additional tightening force, avoid excessive force that may cause distortion of the arm section.
Screw with screw sealant applied Flange
Guide Roller
Collar
Fig. 2.7.1
2-24
No.
Item
Measuring instruments & Input signals
Mode
Measuring point ( ) Adjustment parts ( ) Adjustment level ( )
Adjustment procedure
2.8 1
TORQUE ADJUSTMENT Supply back torque adjustment Cassette torque meter VFK1843 Play Supply side reading of cassette torque meter 6.5 +1.0 x 10-4 N·m -0.5 1) Insert the torque cassette meter VFK1843 and press the [PLAY] button. 2) Confirm that the SUP back torque value is within the specified range. (If the reading varies, read the center value.) 3) If the reading is out of specification, eject the cassette and adjust by moving the tension control arm. Move in direction B * To increase the torque To decrease the torque Move in direction * C. 4) Perform steps 1) and 2) above again and confirm that the SUP back torque value is within the specified range. If it is out of specification, check the in 2.6.8 (4).
Tension control arm
B C Adjust
To increase the torque
To decrease the torque
2
Take-up wind torque adjustment
Cassette torque meter VFK1843
PLAY, Adjustment menu No. 119
Take-up side reading 1) Select adjustment menu [119. FWD TORQUE]. of cassette torque (For the adjustment menu, see 3.1.5, "Admeter justment menu".) 11.5 +1.0 x 10-4 N·m 2) Insert the torque cassette meter VFK1843 -0.5 and press the [PLAY] button. 3) Adjust the TU wind torque so that it is within the specified range. * Press SET (PAUSE) to enter the adjustment mode. * To increase the torque Press (PLAY). Press (STOP). * To decrease the torque 4) After adjustment, press SET (PAUSE) to store the adjustment data.
2-25
No.
Item
Measuring instruments & Input signals
Mode
Measuring point ( ) Adjustment parts ( ) Adjustment level ( )
Adjustment procedure
3
Take-up back Cassette torque meter VFK1844 torque adjustment
REV x 1
B
Adjust
Take-up side reading 1) Insert the torque cassette meter VFK1844 and of cassette torque enter REV x1 mode. meter 2) Confirm that the TU back torque value is within the specified range. (If the reading varies, read 6.5 +1.0 x 10-4 N·m -0.5 the center value.) 3) If the reading is out of specification, eject the cassette and adjust by moving the tension control arm. Tension control arm Move in direction B * To increase the torque To decrease the torque Move in direction * C. 4) Perform steps 1) and 2) above again and confirm that the TU back torque value is within the specified range. If it is out of specification, check the in 2.6.9 (4).
C
To increase the back torque
To decrease the back torque
4
SUP wind torque CHECK
Cassette torque meter VFK1844
REV x 1
Supply side reading of cassette torque meter 11.5 +1.5 x 10-4 N·m -1.0
1) Insert the torque cassette meter VFK1844 and enter REV x1 mode. 2) Confirm that the SUP wind torque is within the specified range. If it is out of specification, check the assembly condition of the reel drive parts.
2-26
2.9
INTERCHANGEABILITY ADJUSTMENT
2.9.1 Interchangeabilty adjustment flow chart Fig. 2-9-1 shows the flow chart of compatibility adjustment.
Start
Connect the REWRITE board.
Set the RF envelope adjusted waveform flat.
Enter modes PLAY SEARCH REV SEARCH FWD PLAY in this sequence, and confirm that tape is not damaged by wrinkles.
OK
NG
Transport system part defect.
NG
Is the envelope flat?
OK
NG
Eject the cassette tape, then start playback again. Is the envelope still flat?
OK
Check the RF envelope during FF and REW, and confirm that the specified waveforms are output in both modes.
NG
OK
* Tension adjustment. * Parts for tension control are defect. * Tension error.
NG
Is the envelope stabilized within 1 second after mode transition from Eject to Play?
Electrical adjustments
OK
NG
Is the envelope stabilized within 1 second after mode transitions from SEARCH FWD to PLAY and from SEARCH REV to PLAY?
OK
NG
Check the RF envelope during REV x1 mode, and confirm that the specified waveform is output.
OK
Fig. 2-9-1
2-27
2.9.2 Tape Transport Restriction The unit uses only the SUP guide roller and TU guide roller to restrict the tape transport. The tape is free (no restriction) from other parts.
4 3
SUP guide roller
SUP slant pole
7
TU guide roller
6
TU slant pole
8
Capstan shaft
2
SUP tension roller
9 1
Entrance guide roller
Pinch roller
10 11
TU tension roller
Exit guide roller
Fig. 2.9.2
SUP tension roller No restriction
SUP guide roller Upper restriction 3 10 TU tension roller No restriction
ENT guide roller No restriction
1
2
Reference plane (Top of main deck)
Tape center
Fig. 2.9.3 Tape Restriction on Supply Side
7 TU guide roller Upper restriction 11 Exit guide roller No restriction
Tape center
Reference plane (Top of main deck)
14
Fig. 2.9.4 Tape Restriction on Take-up Side 2-28
8 Capstan shaft No restriction
6 TU slant pole No restriction
4
SUP slant pole No restriction
No.
Item
Measuring instruments & Input signals
Mode
Measuring point ( ) Adjustment parts ( ) Adjustment level ( )
Adjustment procedure
2.9.3 Interchangeability adjustment 1 Preparation (1) Connect a REWRITE board to the CN4004 on the MAIN board. Refer to preparation of "3.2 DVC UNITS ADJUSTMENTS" for more details. Note: Be sure to clean the tape transport parts and play a cleaning tape before proceeding to the compatibility adjustment.
2
RF envelope adjustment
· Oscilloscope, Play alignment tape VFK1842 Color bar portion
TP9 ENV OUT [REWRITE board] TP5 HID [REWRITE board] Supply guide roller Take-up guide roller Make the waveforms flat. The drop level should be less than 3 dB at both SUP and TU sides. Flatness and variation should be less than 2 dB.
(1) Play alignment tape color bar portion. (2) Observe the measuring points and adjust the supply guide roller and take-up guide roller so that the RF envelope is flat. (3) Set the mode to EJECT, then set to the PLAY mode and confirm that the RF envelope is flat.
Error on supply side
Error on take-up side
Fig. 2.9.5
2-29
No.
Item
Measuring instruments & Input signals
Mode
Measuring point ( ) Adjustment parts ( ) Adjustment level ( )
Adjustment procedure
3
Waveform rise check
· Oscilloscope, Eject Play alignment tape Search FWD VFK1842 Play Color bar portion Search REV Play
TP9 ENV OUT (1) Switch the mode from Eject Play and co[REWRITE board] nfirm that the envelope is stabilized in less than TP5 HID 1 sec. [REWRITE board] (2) Switch the mode from Search FWD Play The envelope and from Search REV Play, and confirm that waveform should be the envelope is stabilized in less than 1 sec. in stabilized within 1 both cases. sec. (3) If the envelope does not stabilized in the specified period, fine-adjust the supply/take-up guide rollers as far as the envelope waveform specification is satisfied, then restart checking from the above procedure (1) again. TP9 ENV OUT [REWRITE board] TP5 HID [REWRITE board] The tape should not be damaged by wrinkle. (1) Transport the self-recorded/played Mini cassette tape from the beginning by changing modes in order of Play Search REV Search FWD Play, and confirm that wrinkles due to strong restriction by the guide rollers and guide pole are not produced on tape. (2) Perform the same check at the section near the end of tape. (3) Confirm that no tape damage occurs when a tape is being loaded, unloaded or ejected. (4) Perform the same procedures (1) -- (3) with a standard cassette.
4
Damage check
· Self-recorded/ played tape 60 ME 270ME
Play Search REV Search FWD Play
5
Envelope check during FF/REW
· Oscilloscope, FF alignment tape REW VFK1842 Color bar portion
TP9 ENV OUT [REWRITE board] TP5 HID [REWRITE board] A 55µsec. B T/3
B t
ENV OUT
MAX
This checking should be done after completing 3-2-1. PB switching point adjustment. (1) Insert the alignment tape and enter Stop mode. (2) Enter FF mode. (3) Confirm that the envelope output is present at 55 µs before the HID switching timing. (4) Check the take-up side of the envelope to see that the MAX output duration is more than 1/3 the HID duration. (5) Enter REW mode and check the same items as (3) and (4) above. (6) If the envelope is out of specification, check the tension band and main brake assembly and replace if needed. Confirm the playback switching point.
HIGH HID A T LOW
Fig. 2.9.6
2-30