Adjustment Of Mic Amp Circuit; Checking Of Ee Level (Sub Pwb); Checking Of F Characteristics (Sub Pwb); Setting Of Model Id - Sharp VL-Z400H-T Service Manual

VL-Z400S-T/H-T
VL-Z500S-S/H-S/E-T/E-S

ADJUSTMENT OF MIC AMP CIRCUIT

TL1472
Checking of EE level
Checking of f characteristics
VA602
C601
R604
R7427
C1501 R1501
C1503 R1502
C1502 C1508
C1504 R1503
C2904 C1509
C1510
C1505 R1504

1. Checking of EE level (Sub PWB)

Measuring instrument
Mode
Test signal
Adjusting method
Examples

2. Checking of f characteristics (Sub PWB)

Measuring instrument
Mode
Test signal
Adjusting method
Examples

Setting of MODEL ID

Address
Mode
Setting method
Examples
(Wiring board diagram: Sub Side A)
TL1470
Checking of EE level
Checking of f characteristics
CP3
CP2
CP1
C2905
C2906
SC1501
Valve voltmeter
P-ON (CAM)
1kHz, -54dBs sine wave
1) Apply a 1kHz, -54dBs sine wave to TL3601 (INT MIC L) and TL3602 (INT MIC R).
2) Check that the signal levels of TL1472 Audio-L out and TL1470 Audio-R out satisfy the adjustment
rating.
Valve voltmeter
P-ON (CAM)
100Hz and 10kHz , -54dBs sine wave
1) Apply a -54dBs, 100Hz sine wave and then a 10kHz , -54dBs sine wave to TL3601 (INT MIC L) and
TL3602 (INT MIC R).
2) Check that the signal levels of TL1472 Audio-L out and TL1470 Audio-R out satisfy the adjustment
rating on a base of 1kHZ in each case.
VCR ADJ FD, FE, FF
VCR mode
1) Using command 12, select the VCR adjustment mode.
2) Using command 20, enable writing to the E
3) Set MODEL ID at each address.
Replacement of E 2 PROM (IC705)
R1511
R1513 R1512
D3601
D3600
C521
VA501
C522
R3635
R506
R3602
1
Measurement point TL1472, TL1470
-8dBs ± 3dB
Adjustment rating
Test point TL1472, TL1470
(On a base of 1kHZ) 100Hz : -6dBs ± 3dB
Adjustment rating
Setting rating 10, 20
2
PROM.
34
SC1501
Q2903
R2904
R2903
R2523 R2530
R2525 R2531
C2520 C2521
D2902
Q2902
R2931
P900
C2517 C2515 R2515
R2512 R2533 R2516
C2910
C2903
R2514 C2518
R2509 R2513
C2516 C2901
R2508 R2916
TL3602(INT MIC R)
TL3601(INT MIC L)
Checking of EE level
Checking of EE level
Checking of f characteristics Checking of f characteristics
10kHz : -3dBs ± 3dB
Address FDh FEh
Date 10h 20h Z400S(ST) 8B
Z400H(HT) 90
Z500S
Z500E
Z500H
R2917
Q2904
FFh
78
7A
79