Service manual
30
VL-FD1U
VL-SD20U
Tape is EJECT.
The built-in VI/O
colour bar is recorded.
VS REW
PB
Phase and
equalizer are
adjusted
automatically.
Judgment
OK:
Blue LCD comes on.
NG:
Red LCD comes on.
1. PLL VCO adjustment
Mode VCR ADJ mode
Procedure 1) Playback the alignment tape (or a self-recorded tape).
2) Call the adjustment mode (V-ADJ).
3) Set the address "2A" and call the data.
4) Set the called data with the FF/REW key to the point where the playback screen appears.
(At this time, the screen full of block noise is OK.)
Examples • During E
2
PROM replacement. • During circuit board (Main) replacement.
ADJUSTING THE ELECTROMAGNETIC CONVERSION CIRCUIT SYSTEM
2. Phase and equalizer adjustment → (Performed in the VCR mode)
Mode VCR ADJ mode
Procedure 1) Load a self-recorded tape into the deck.
2) After playback for 3 minutes, select the test mode 0F using the remote control for adjustment to start the
automatic adjustment. (The following sequence is automatically performed.)
3) Error rate check
Select and fix the TEST MODE 0B on the adjustment remote control.
4) Manual adjustment method (video adjustment mode)
* Perform this adjustment with the self-recording/playback in the LP mode.
For phase, vary the data for the address 26 and 2B, and for equalizer, vary the data for the address 25 and 27,
to set the error rate is made as small as possible.
Examples • During mechanism replacement. • During circuit board (Main) replacement. • During E
2
PROM replacement.
Synchronization error
Error rate
H
L
Phase Equalizer
H ch side 2B 27
L ch side 26 25
Synchronization error 20 or less
Error rate 200 or less (SP Mode)
330 or less (LP Mode)
1. PCO D/A-Y adjustment
Test point TL2409 (connected to oscilloscope) Mode EE mode
Procedure 1) Connect the AVS cable and then connect it to the monitor (TO).
2) Call the adjustment mode (V-ADJ).
3) Set the address to "22", and call the date.
(100% white signal is output.)
4) Vary the date with the FF and REW keys to set the signal appearing at TL2409 to 1.0Vp-p ± 0.05.
Examples • During E
2
PROM replacement. • During IC4401 replacement. • During IC1401 replacement.
1.0±0.05
ADJUSTING THE VIDEO I/O CIRCUIT SYSTEM
(Wiring board diagram: Main Side B)
6715
L
6701
T
L6711
T
L6713
TL6709
TL6703
TL6707
FB702
TL6705
TL752
TL750
TL751
TL6717
R7402
TL7405TL7403
TL7401
TL7402
R2409
TL2408
TL2405
FB2405
TL2410
TL2406
TL2401
L2401
FB2401
TL2403
R2401
R2405
R2404
R2402
R3474
C2401
Z1
TL6728
TL2402
TL6733
TL6732
TL2404
SC2401
TL2409
TL3411
TL6730
TL2407
TL6729
TL6731
FB2406
Q7402
FB2410
R2407
R7403
FB2408
C7402
R7401
FB7401
Q7403
C7413
Q7401
R7415
R7416
R7413
D7401
R7433
C1730
D7402
R7431
R7436
TL7404
R7417
C7417
R7421
R7434
R7424
R7450R7427C7424
C7426
C7425
R7426
C7423
R7423
X7401
C7427
R7422
C7421
R7425
FB7402
TL753
C768
C7403
R765
Q750
L7701
R763
R764
R762
R760
C7419
FB701
C7701
C7718
R761
C7719
R7713
R7714
6708
6706
6704
6702
C7714 C7716 C7715C7407R7406
C752
R7441
IC7401
IC7402
R7444
R7447
R7446
C7405
R7445
R7418 C7416
C1718
C1715
C1717
R7448
TL1705
R7419
C1713
R1710
C1711
C1723
C1721
R7420
C1724
TL1704
TL1703
C1725
C1729
C7414
C1727
IC1702
R1713
R1714
C1728
R1712
R1711
C1726
TL1702
R1701
C1722
C1720
C1719
C1716
R1709
R1708
C1714
C1712
TL3334
TL3335
TL3336
TL3337
TL3343TL3310TL3345
SC3301
TL3314
TL3324
TL3303
TL3307
TL3308
TL3309
R3495R3466R3467
R3496
R3460
Q3405
IC3405
R3494
R3475
C3462 C3443
R3497
R
C3442
R3458
C3441
R
Q3401
Q3406
Q3407
R3489
R3465
C
C3440
R3498
R3459R3464
TL3367
TL3323
TL3320
TL3366
TL3315
R3404
C1710
TL3321
C3403
TL3356
TL3360
C1706
R3401
C3402
TL3357
TL3358
R1706R1702
TL1701
C3401
TL3346
TL3344
R1707R1705
R1720
R1722
Q1701
C1704
R1715
R1721
R1703
R1716
L
L1702
R1704
C1702
C
C1703
C1732
L1701
C
R1740
C761
IC7
C1707
R701
C1709
C1708
C762
C702 R712
R709
R717
D701
R7442
IC705
R743
Q701
TL715
R7443
TL3348
R705
R714
R713
C705
R7472
R715
R704
R711 C704
C712
C708
TL716
C755
IC703
R710
R702
R703
R750 R753
C7713
C753
C756 R754
C760 C764
R756
C759 C710
R755 R752
TL2409
PCO D/A-Y
TL2407
PCO D/A-C