Sharp VL-Z7E-A Service Manual page 31

ADJUSTMENT OF VIDEO I/O CIRCUIT SYSTEM
(Envelope checkup TP jig)
1. Adjustment of PCO D/A-Y
Measurement point (On envelope checkup TP jig)
Address VCR ADJ 566
1Disconnect the DC cable or battery from the unit.
Adjusting method
2Connect the envelope checkup TP jig to P3303.
3Reconnect the DC cable or battery to the unit, and turn on the power. (on the shooting side)
1) Connect the AVS cable to the monitor (TO).
2) Select the adjustment mode (V-ADJ).
3) Select address "566" to call up the data.
4) Set the "Y" signal of the envelope checkup TP jig to 1.0 ± 0.05Vp-p by changing the data value
Examples · Replacement of IC705, IC4401, IC1401
2. Adjustment of PCO D/A-C
Measurement point (On envelope checkup TP jig)
Address VCR ADJ 567
1Disconnect the DC cable or battery from the unit.
Adjusting method
2Connect the envelope checkup TP jig to P3303.
3Reconnect the DC cable or battery to the unit, and turn on the power. (on the shooting side)
1) Connect the AVS cable to the monitor (TO).
2) Select the adjustment mode (V-ADJ).
3) Select address "567" to call up the data.
4) Set the "C" signal of the envelope checkup TP jig to 0.64 ± 0.05Vp-p by changing the data value
Examples
ADJUSTMENT OF VF CIRCUIT
(Wiring board diagram: Main Side A)
TL7824(VF_G_OUT)
VF_DAC full scale
1. Setteing of parameters (Main PWB)
* Preset the following data.
Address 582 585 597 5B9 5E4 5E5 580 588 589 58D 5A2 5A4 5A7 5A8 5A9 5B5 5B7 5B8 5C9 5D3
NTSC 3D 40 00 —
PAL — — 00 00
(A 100% white signal appears.)
with the FF/REW keys.
with the FF/REW keys.
· Replacement of IC705, IC4401, IC1401
R710
R706
TL8803
C708 R736 R729 R759 C710 R741 C733 R755
Q1802
R738 R737 R763 R758 R735 R725 R720
C1805
R1814
R718
R1801
R1817 R1827
R771
C1802
R1805
C1806
R772
C1804
R1807 R4402
C704
R1810
R1819 R4401
R1402 R1419
C1809 Q1402
R1823
C1406
C1407
R1413
R1414
C1810
TL6807
R1406 C1416 R1405 C1418
Q1404
R1423
TL6809
R6802
R6816 TL7819
R6803 R6817
Q1405
C6811
C6800 R6805
TL6804
TL6803
C1419
TL6801
R1421
TL6802
R1404
R6804 C6802
D6800
R6813
C6807 C6801
R6810
C1410
C1408 C1409 R6812 R6807
— — 00 00 00
18 18 00 00 00
Mode
Mode
X701 C1911
C962
C978
Q1912
Q905
D916
TL903
L907
D960
R1926 C929
TL8801 R8807 R8806
TL904
R8804
C8806
Q8800
TL911
TL907 C8803
Q8801
C8807
IC8800
R8814 R8828
C7825
R8827 TL8802 C3710
TL7824
C7800
C7822
L7800 C4403
R7825
R7824
L7810
R7840
C7830
C7810 R7811
R7836
R7800 R7812
C3704 R3705
C4428
R4415
C7827
C4418
R4495 C4417
IC4401
C4426 TL4440
28 00 — F1 — 40 8B 8B 7D E0
— 00 D0 F1 E7 E7 8B 8B 7D E0
31
VL-Z7S/E/Z7E-A/Z7E-W
VL-Z8H
PCO D/A-Y
PCO D/A-C
EE mode
1.0 ± 0.05
EE mode
yyyyyy
yyyyyy
yy yyyyyy
yy yyyyyy 0.64 ± 0.05
yy yyyyyy
yyyyyy
TL8801(VF_COM)
VF_COM
L901
C934
Q1901
TL910
C1901
C939
C3708
FB3701
TL908
Q1905
R1941
IC3702 TL8804(VF_VG)
VF_WB
TL8804 TL8805
TL8805(VF_VR)
TL8806
R3717 C3705C3712 C3709
VF_WB
TL8806(VF_VB)
VF_WB
—
04