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27
VL-NZ10S/H/E
1. VCO free-run adjustment
Test point
TL7800
Address
VCR ADJ 32
Mode
VCR AV input
Procedure
1) Input the white 100% signal to AV input.
2) Connect the digital voltmeter to TL7800, and adjust DC voltage value to the specified adjustment value with
VCR ADJ 32.
Adjustment
2.00
±
0.1V
rating
Examples
• During E
2
PROM (IC705) replacement. • During VIO ENG (IC4401) replacement.
2. DAC full-scale adjustment
Test point
TL2802(R OUT), TL2803(G OUT), TL2804(B OUT)
Address
VCR ADJ 3D(R), VCR ADJ 3E(G), VCR ADJ 3F(B)
Mode
VCR AV input
Procedure
1) Set the VCR ADJ 83/93/C0 to 00/77/00. (At this time, LCD can not be displayed.)
2) With the VCR ADJ 3D, adjust the output voltage of TL2802 and the DC voltage value of the digital voltmeter to
the specified adjustment values.
3) Similarly with the VCR ADJ 3E/3F, adjust the output voltage of TL2803/2804 and the DC voltage value of the
digital voltmeter to the specified adjustment values. (Same as Item (2))
4) Return the VCR ADJ 83/93/C0 to the initial value. (Initialization: C5/7F/28)
Adjustment
0.78V
±
10mV
rating
Examples
• During E
2
PROM (IC705) replacement. • During VIO ENG (IC4401) replacement.
ADJUSTING THE LCD CIRCUIT
*
To make this adjustment, set the backlight switch to the "NORMAL" position.
(Wiring board diagram: Main Side A)
Adjustment procedure and connecting same as the VCR section.
3. COMMON PULSE adjustment
Test point
TL2801(C OUT)
Address
VCR ADJ 29(C)
Mode
VCR AV input
Procedure
1) Connect TL2800 to GND.
2) With VCR ADJ 29, adjust the output voltage of TL2801 and the DC voltage value of the digital voltmeter to the
specified adjustment values.
Adjustment
6.95V
±
50mV
rating
Examples
• During E
2
PROM (IC705) replacement.
(Wiring board diagram: Main Side B)
TL211
TL210
TL212
C218
C217
C220
R246
R219
C4465
R4468
C4464
Q4462
R4465
R4464
C4461
R4469
IC4461
FB
R7827
C4466
TL442
R7847
TL442
TL442
C7815
R7856
C7813
R4495
C7844
C4431
C4432
R4460
R7841
R4461
R7857
L7801
TL4429
C7842
C7837
R4403
C4463
R4462
C4462
TL4428
D7800
C7816
R4494
R7843
R7851
TL249
TL4421
Q4461
C4403
TL244
TL243
R4467
TL248
R4463
C213
C214
TL246
TL209
TL208
TL250
IC202
TL203
C208
C207
C210
FB204
C211
FB203
C203
C206
TL7800
R7852
TL4440
C7843
TL443
TL443
R7860
R4414
TL7800
VCO free-run
D2801
P1203
C2802
R2802
R2801
C2824
C2816
C2815
R2820
C2822
R2809
Q2801
C2813
R2830
C2812
R2808
R2844
R2825
R2824
R2804
C2814
R2841
R2853
R2815
R2813
R2852
C2800
R2851
C2829
2
TL2803
TL2801
R2811
L2801
C2805
C2803
C2804
TL2802TL2804
L2800
Q2802
L151
IC2800
R2822
R2829
C156
TL2800
R156
R2803
C157
C2806
C158
TL1269
C2809
C2811
C2810
L2802
C154
C159
Q2800
R2812
R2814
C160
C161
R4478
R4473
C153
Q4471
R159
R4477
TL151
R4475
R4474
TL152
P153
C
C163
R154
C162
IC151
R152
C165
R153
R3718
C3702
C155
Q3701
L3701
TL2802(R OUT)
DAC full-scale
TL2804(B OUT)
DAC full-scale
TL2801(C OUT)
COMMON PULSE
TL2800
COMMON PULSE
TL2803(G OUT)
DAC full-scale
www.freeservicemanuals.info
12/9/2016
Published in Heiloo, Holland