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5. Alignment and Adjustment
Note : After replacing the assÕy full deck, the assÕy main, the cylinder assÕy and the micom(IC601), the remote control assÕy can be used to adjust the ÒX-point (tracking center) adjustmentÓ and ÒHead S/W pointÓ adjustment.
5-1 Reference
5-1-1 The type of remote control ass'y
POWER BUTTON
POWER EJECT
1. Remote control assÕy (AC93-10039Y/69099-633-252) is specified as a service jig in the service manual of X-5/X-6(DX5-R/DX5-RC/DX6-R/DX6-RC) chassis. (See Fig. 5-1) 2. Normal remote control assÕy for X-7/X-8 (DX7-R/DX7-RC/DX8-R/DX8-RC) chassis. (See Fig. 5-2)
TRACKING CENTER ADJ. ("INPUT" OR "TEST" AND "1" BUTTON)
1 4 7
CLK/COUNT
2 5
DAILY
3
Q-PRO
6
WEEKLY
MENU
8 0
9
CLR/RST
HEAD S/W ADJ. ("INPUT" OR "TEST" AND "3" BUTTON)
DISPLAY
PRESET
BAND
SEARCH
MEMORY
FINE
CH
SHIFT SHUTTLE
PLAY
TRK (TRACKING, FINE) BUTTON PLAY BUTTON
REW
F.F
5-1-2 How to identify between normal remote control ass'y and multi remote control ass'y for X-7/X-8 chassis (See Fig. 5-2)
1. The color of some buttons related to TV function are gold. 2. Audio button is added instead of the test button hidden behind of inlay. 3. The positions of some buttons are different.
STOP
REC INDEX SLOW
P/S INPUT
SP LP
A.DUB
VPS
INPUT BUTTON TEST BUTTON IS HIDDEN BEHIND OF INLAY. REMOTE CONTROL ASS'Y PART NO.
SP/LP BUTTON
OUTPUT 633-252
Fig. 5-1 Remote Control Ass'y Jig for X-5/X-6 Chassis (AC93-10039Y/69099-633-252)
MULTI REMOTE CONTROL ASS'Y (CAN NOT ADJUST)
VCR POWER TV POWER
NORMAL REMOTE CONTROL ASS'Y (CAN ADJUST)
POWER EJECT
GOLD COLOR
POWER BUTTON TRACKING CENTER ADJ. ("INPUT" OR "TEST" AND "1" BUTTON) SPEED BUTTON
SYSTEM
1 4 7
CLK/COUNT
2 5 8 0
3
AUDIO
6
DISPLAY
9
CLR/RST INPUT
HEAD S/W ADJ. ("INPUT" OR "TEST" AND "3" BUTTON) INPUT BUTTON TRK (TRACKING, FINE) BUTTON PLAY BUTTON
VCR
1 4 7
CLK/COUNT
2 5 8 0
3
TV
6
DISP./
GOLD COLOR GOLD COLOR GOLD COLOR
9
CLR/RST -/-INPUT
SPEED
AFT
SPEED
INDEX
A.TRK
FINE
PROG
INDEX
FINE
VOLUME
PROG
SHUTTLE
SHUTTLE
PLAY
PLAY
REW
F.F
REW
F.F
STOP
STOP
REC MENU Q-PRO
P/S
REC MENU Q-PRO
P/S
SOFTEN
OK
SHARPEN TV/VCR
SOFTEN
OK
SHARPEN TV/VCR
SLOW PICTURE
A.DUB PICTURE
SLOW AUDIO
A.DUB
TEST BUTTON IS HIDDEN BEHIND OF INLAY.
ADD BUTTON(AUDIO)
Fig. 5-2 Remote Control Ass'y for X-7/X-8 Chassis Samsung Electronics 5-1
Alignment and Adjustment
5-2 Mechanical Adjustment
Note : Refer to the Mechanical Manual ÒDX7-R/DX7-RC/DX8-R/DX8-RC (AC68-20316A)Ó for the adjustment and confirmation of assÕy full deck.
5-2-1 The number and position of test point
Test point : TP02 (CTL Pulse) TP03 (H'D S/W -Trigger) TP04 (V. Envelope) TP05 (Audio out)
AUDIO OUT H'D S/W -TRIGGER
SCART CTL AGC
H'D SW
V.OUT A.OUT
V.ENV
TP04 TP03 TP02
TP08 TP07
TP06
TP05
TP01
GND
CTL
CTL PULSE V. ENVELOPE
Fig. 5-3 The position of test point (Main PCB-Component side) 5-2 Samsung Electronics
Alignment and Adjustment
5-2-2 X-Point(Tracking center) adjustment (See the 2-2-1 (d) AC HEAD POSITION(X-POINT) ADJUSTMENT on page 2-3 of the mechanical manual)
5-2-2 (a) IF THE REMOTE CONTROL ASS'Y IS NOT AVAILABLE
1. Playback the colorbar alignment tape. 2. Connect CH-1 scope probe to ÒTP02Ó and CH-2 scope probe to ÒTP03Ó. And then, trigger head switching pulse. 3. Set tracking preset to 15msec (2head : 0.5msec, 4head : 14.5msec) using the ÒFINE(Tracking, TRK)Ó button / of remote control assÕy. 4. Connect CH-1 scope probe to ÒTP02Ó and the CH-2 to ÒTP03Ó trigger on CH-1. 5. Insert the adjusting driver (+) into X-position adjusting gear. Adjust the driver in either direction for maximum envelope waveform. Note : Since the adjusting gear unit may be damaged, do not adjust by force when adjusting the X-point using the adjusting driver (+). After turn the X-point adjusting screw (D) counterclockwise a little, perform the adjustment. After adjustment is completed, tighten the screw. - Volt/div. : CH-1 = 0.1V CH-2 = 0.2V CH-2 Probe TP02 H'D S/W Pulse CH-1 Probe TP03 CTL Pulse - Time/div. : 5msec
SCREW(B) AZIMUTH ADJUST
SCREW(C) TILT ADJUST
X-POSITION ADJUST GEAR HOLE
SCREW(A) HEIGHT ADJUST
SCREW(D) X-POINT LOCKING
Fig. 5-6 Location of A/C Head adjustment screw
5-2-2 (b) IF THE REMOTE CONTROL ASS'Y (AC93-10039Y/69099-633-252) IS AVAILABLE
Note : How to use the ÒTESTÓ button. 1. Disattach the inlay of remote control assÕy. (See Fig. 5-1 and Fig. 5-2) 2. Press the ÒTESTÓ button with the pincers and the precise driver as shown in Fig. 5-1 and 5-2) 1. When using the ÒINPUTÓ button of remote control assÕy; 1) Simultaneously press the ÒINPUTÓ button and Ò1Ó button in PB mode. This will adjust the tracking center automatically. 2) Set the tracking preset using the ÒFINE(Tracking, TRK)Ó button of remote control. 3) After adjustment is completed, press the ÒPOWERÓ button to release. 2. When using the ÒTESTÓ button of remote control assÕy ; 1) Simultaneously press the ÒTESTÓ button and Ò5Ó button in PB mode. This will adjust the tracking center automatically. 2) Set the tracking preset using the ÒFINE (Tracking, TRK) button of remote control. 3) After adjustment is completed, press the ÒPOWERÓ button to release.
0.5msec(2 head) 15msec(6 head) 14.5msec(4 head)
Fig. 5-4 Tracking preset adjustment REMOTE BUTTONS
PUSH
CONTROL PULSE REMOVE
TRACKING
TRACKING
PUSH
Fig. 5-5 Tracking preset adjustment Samsung Electronics 5-3
Alignment and Adjustment
5-2-2 (b) IF THE NORMAL REMOTE CONTROL ASS'Y OF X-7/X-8(DX7-R/DX7-RC/ DX8-R/DX8-RC) CHASSIS IS AVAILABLE
Note 1 : Two kinds of remote control assÕy are used for X-7/X-8(DX7-R/DX7-RC/DX8-R/ DX8-RC) chassis. 1. One is a normal remote control assÕy, the other is a multi remote control assÕy 2. All adjustments are adjusted by normal remote control assÕy only. 3. For the identification of normal remote control assÕy and multi remote control assÕy, See page 5-1. Note 2 : How to use the ÒTESTÓ button. 1. Disattach the inlay of remote control assÕy. (See Fig. 5-1 and Fig. 5-2) 2. Press the ÒTESTÓ button with the pincers and the precise driver as shown in Fig. 5-1 and 5-2) 1. When using the ÒINPUTÓ button of remote control assÕy; 1) Simultaneously press the ÒINPUTÓ button and Ò1Ó button in PB mode. This will adjust the tracking center automatically. 2) Set the tracking preset using the ÒFINE(Tracking, TRK)Ó button of remote control. 3) After adjustment is completed, press the ÒPOWERÓ button to release. 2. When using the ÒTESTÓ button of remote control assÕy ; 1) Simultaneously press the ÒTESTÓ button and Ò5Ó button in PB mode. This will adjust the tracking center automatically. 2) Set the tracking preset using the ÒFINE (Tracking, TRK) button of remote control. 3) After adjustment is completed, press the ÒPOWERÓ button to release.
5-4
Samsung Electronics
Alignment and Adjustment
5-3 Electrical Adjustment
5-3-1 Head S/W Adjustment
Note : Only remote control assÕy can adjust. 2. When using the ÒTESTÓ button of remote control assÕy ; 1) Insert an SP tape into the housing assÕy. 2) Press the ÒPLAYÓ button. 3) Press the ÒTESTÓ button and ÒSPEEDÓ button simultaneously. 4) This will adjust the head S/W point adjustment automatically. 5) After adjustment is completed, press the ÒPOWERÓ button to release.
5-3-1 (a) IF REMOTE CONTROL ASS'Y (AC93-10039Y/69099-633-252) IS AVAILABLE
1. When using the ÒINPUTÓ button of remote control assÕy ; 1) Insert an SP tape into the housing assÕy. 2) Set the unit to stop mode. 3) Press the ÒINPUTÓ button and Ò3Ó button simultaneously. 4) Press the ÒPLAYÓ button. 5) This will adjust the head S/W point adjustment automatically. 6) After the adjustment is completed, press ÒPOWERÓ button to release. 2. When using the ÒTESTÓ button of remote control assÕy ; 1) Insert an SP tape into the housing assÕy. 2) Set the unit to stop mode. 3) Press the ÒTESTÓ button and ÒSP/LPÓ button simultaneously. 4) Press the ÒPLAYÓ button. 5) This will adjust the head S/W point adjustment automatically. 6) After adjustment is completed, press the ÒPOWERÓ button to release.
5-3-1 (b) IF NORMAL REMOTE CONTROL ASS'Y FOR X-7/X-8(DX7-R/DX7-RC/ DX8-R/DX8-RC) CHASSIS IS AVAILABLE
1. When using the ÒINPUTÓ button of remote control assÕy ; 1) Insert an SP tape into the housing assÕy. 2) Press the ÒPLAYÓ button. 3) Press the ÒINPUTÓ button and Ò3Ó button simultaneously. 4) This will adjust the head S/W point adjustment automatically. 5) After the adjustment is completed, press ÒPOWERÓ button to release.
Samsung Electronics
5-5
Alignment and Adjustment
5-3-2 RF AGC Adjustment
Step Adjustment Item
ADJ. point
1. Mode and input signal/ alignment tape 2. Test point and ADJ. part 3. Result and Remarks
Test
poin
t
5-3-2 (a) ADJUSTMENT PROCEDURES
1. ÒE-EÓ (stop mode), RF signal. 2. TP07 and VR401. 3. Apply PAL color bar signal to the video input terminal of the TV channel generator and set channel selector to CH 2 (48.25MHz). 4. Adjust the point signal level so that the output of attenuator is 70dBu. 5. Apply the output of attenuator to the ANT IN terminal of VCR. 6. Set the channel of VCR to CH 2. 7. Connect DC voltmeter to TP07. 8. Adjust VR401 for DC 3.7 ± 0.1V.
* Composition for RF AGC adjustment
PAL Color bar signal out
PAL Pattern generator
TV CH Generator CH 2 (48.25MHz)
70dBu
Attenuator
VCR
ANT IN TP07
DC Voltmeter
VR401
5-6
TP08 TP07 TP06 TP05 TP04 TP03 TP02 TP01
SCART CTL AGC V.OUT A.OUT V.ENV H'D SW CTL GND
Main PCB (Component side) Samsung Electronics
Alignment and Adjustment
5-4 Timing Chart of Program S/W
SW A (IC601-77) SW B (IC601-78) END -SENSOR (IC601-13) START -SENSOR (IC601-14)
CASS IN EJECT UNLOAD RPS R.SLW STILL PB STOP F/R
Position Eject Cassette IN Unload R. PS R. Slow Still Play Stop FF/REW
Program S/W (SW601) E/S L H L H H L H L L H L H L H E/S L H E/S L L L H H L L H L H L E/S L L H Eject Cassette IN Unload R. PS, Z-R. PS
Action Mode
Pinch Roller off Position Still, Slow, F-ADV PB, T-Stop, REC, Pause, F. PS, Z-FPS Stop, Power off FF, REW
Samsung Electronics
5-7
Alignment and Adjustment
MEMO
5-8
Samsung Electronics