Service manual
38
VL-Z1U
TL601
FB600
TL600
C602
VA603
VA602
TL602
C601
R652
R600
VA600
R7427
VA601
C600
R603
TL603
R604
R7429
R7428
R7426
D7402
D7401
C1501R1501
C1503R1502
C1502C1508
C1504R1503
C2904C1509
C1510
C1505R1504
C1506R1505
C2906
R2901 R1480
R2915
R2914
C2905
1
TL1477
CP1
CP2
L2901
CP3
TL1473
TL1472
TL1471
TL1476
TL1470
C553
C554
C556
C558
C559
C561
R552
R553
R555
R559
R2556
R2555
Q2551
R2552
R2560
R2559
C3605
R3607
Q3600
R3605
R3603
C3601
C3602R3604
R631
R
R651
C
6
C629
R629
TL
3
C633 R633 R3642
C36
0
IC6
0
R622
C626
R625
C631
R627
R630
C628
C651
R628
R624
C625
R3600 C621 R626
Q3602
C624
Q602
L3600
R611
R639
C619 R619
R3601
R653
C623
C622
C2551
C620
R3616
R3645
C608 R616 R614 R3610C3641
C643
Q2554
C3640
C617
R3609R3641
C614
C607
C613
R618
C615
C609
C616
R621
R2561
C610
R3640
C618
R3628
C650
R612
R606
R617
C606
C611
C612
Q2552
C648
R3625
C647
R3630
C3627
R620
R615 Q3604
R613
Q3601
C3621
R3620
C3610
C3608
C3609
R661
C3613
R2551R2554
R3608
C3619 R3615R3617
R623
R607
C3625
C3626
R3627
R3623
C3617
R3636C3615
R2553
C3611
R3613
C3629
Q2553
Q603
Q605
C3631
R2558
C603
R2557
C3614
R3614
R3632
R610
R3646
C644
R654
R3633
C560
C3612
R3634
IC3601
R557
C3634
C3635
C3632
C552
R3631
R554
IC551
C3646
C557
R3639
TL3602
C3616
C3618
C3630
C3628
C3622
R3624
R3621
C555
R3637
L551
R551
C551
P3602
R3629
C3623
R3619
R3622
C3620
C3606
C574
R3638
C3624
R3626
C562
C573
TL3601
TL3601(INT MIC L)
Checking of EE level
Checking of f characteristics
TL1472
Checking of EE level
Checking of f characteristics
ADJUSTMENT OF MIC AMP CIRCUIT
1. Checking of EE level (Sub PWB)
Measuring instrument Valve voltmeter Measurement point TL1472
Mode P-ON (CAM) Adjustment rating -6.5dBs ± 3dB
Test signal 1kHz, -54dBs sine wave
Adjusting method 1) Apply a 1kHz, -54dBs sine wave to TL3601 (INT MIC L).
2) Check that the signal levels of TL1472 Audio-L out satisfy the adjustment rating.
Examples
2. Checking of f characteristics (Sub PWB)
Measuring instrument Valve voltmeter Test point TL1472
Mode P-ON (CAM) Adjustment rating
(On a base of 1kHZ)
100Hz : -3.5dBs ± 3dB
10kHz : -1.5dBs ± 3dB
Test signal 100Hz and 10kHz , -54dBs sine wave
Adjusting method 1) Apply a -54dBs, 100Hz sine wave and then a 10kHz , -54dBs sine wave to TL3601 (INT MIC L).
2) Check that the signal levels of TL1472 Audio-L out satisfy the adjustment rating on a base of 1kHZ
in each case.
Examples
(Wiring board diagram: Sub Side A)
(Wiring board diagram: Sub Side B)
Setting of MODEL ID
Address VCR ADJ FD, FE, FF
Mode VCR mode Setting rating 10, 20
Setting method 1) Using command 12, select the VCR adjustment mode.
2) Using command 20, enable writing to the E
2
PROM.
3) Set MODEL ID at each address.
Examples Replacement of E
2
PROM (IC705)
Address FDh FEh FFh
Date 10h 20h 56