27
VL-NZ50S/H/E/W/NZ80H
VL-NZ100S/H/E
1. VCO free-run adjustment
Test point
TL7820
Address
VCR ADJ 32
Mode
VCR AV input
Procedure
1) Set the data of the addresses 523/524/525/526 to A9/90/80/80, respectively. (White 100%)
2) Connect the digital voltmeter to TL7820, and adjust DC voltage value to the specified adjustment value with
VCR ADJ 32.
3) Return the data of the addresses 523/524/525/526 to the initial values. (Initial values: A1/10/80/80)
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
TL7825(R OUT), TL7824(G OUT), TL7823(B OUT)
Address
VCR ADJ 5E0(R), VCR ADJ 5DF(G), VCR ADJ 5DE(B)
Mode
VCR AV input
Procedure
1) Set the VCR ADJ 585/59A/5D0 to 00/77/00. (At this time, LCD can not be displayed.)
2) With the VCR ADJ 5E0, adjust the output voltage of TL7825 and the DC voltage value of the digital voltmeter to
the specified adjustment values.
3) Similarly with the VCR ADJ 5DF/5DE, adjust the output voltage of TL7824/7823 and the DC voltage value of
the digital voltmeter to the specified adjustment values. (Same as Item (2))
4) Return the VCR ADJ 585/59A/5D0 to the initial value. (Initial values: 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)
R2821
C2807
R2815
C2800
D2802
C2803
TL2801
R2819
D2800
SW901
R2813
R2811
IC2803
C451
C2801
R2818
R416
R2807
TL2800
R443
C452
C2816
C405
D2801
IC405
Q2800
R446
R412
TL919
C2802
R2803
R442
R411
R441
TL8827
TL2826
TL2825
TL2824
R2812
R2814
C450
R406
C2823
R2840
R2856
C2826
C2815
R440
C407
L2803
C404
R407
TL3337
TL3319
TL3318
TL3317
TL8828
SC2801
C2827
R2823
C2825
L2802
C2824
TL3320
TL3321
TL3301
TL3322
TL3323
R2830
R2853
R2852
R2851
R2802
R2801
C2828
C2822
R478
C2813
R2825
C2806
C2814
C419
C474
C460
C421
C418
C472
C
C2812
R431
R432
TL402
TL418
C430
R418
X401
R2824
R2820
P1203
C475
L471
C410
TL4429
R2822
Q2801
C476
Q2802
IC407
R2829
C2811
C7823
C2805
L2801
C2810
C463
C462
R415
IC2800
C2809
C7806
L2800
C2804
IC452
C167
IC408
R158
R157
R153
R152
C165
IC152
L151
R156
C1
6
TL2801(C OUT)
COMMON PULSE
TL2800
COMMON PULSE
L214
T
L4425
TL201
C208
TL202
TL4434
IC202
IC70
C207
C210
FB202
C218
FB204
C211
TL203
C217
FB203
C220
C206
IC4461
C205
R246
C203
R219
C4465
TL4424
TL4439
TL4438
TL4437
TL210
TL208
TL212
TL207
TL206
R4469
R
C213
R4414
Q4462
R4453
TL4440
C7820
R4468
C4464
R4467
TL209
R7824
D7810
C7811
R7821
R7820
C7821
L4451
R7825
TL211
D4451
C7812
R7812
R4464
L7800
R4415
TL7820
C7822
R7810
X4451
R7822
C4495
C4454
R4454
R7823
L7810
C4403
C4451
R4495
C4417
C4418
C4428
C7800
R7819
R4403
C7807
R4407
C4423
TL4403
D4452
R7811
C7810
R4451
C4426
C4424
R4456
R4401
C4427
C4435
C7809
C4404
C7826
C7802
C4415
C7801
C4436
R4435
C4422
C7805
R4436
C7808
TL7825
R7828
C7803
Q4432
L1401
C7824
C4413
C4414
R7831
TL7824
R7827
C4410
C7804
IC4401
C4421
C1401
R7830
TL7823
R4404
C
R7826
C4408
L1431
R
R7829
C4409
C1431
C4407
Q1431
L1450
C4420
TL4406
C1458
R7800
Q1450
C7813
TL4428
TL4405
TL4426
TL4404
R
C7814
C7815
C7816
C7817
C7818
R4408
R4494
C4416
C4419
C4494
R1452
R4486
R4488
C4482
R1451
TL3334
Q1451
Q1452
R4474
R4478
R4476
R4477
C4485
R1454
Q4471
R1455
R4487
Q4481
Q4482
C1450
TL7820
VCO free-run
TL7825(R OUT)
DAC full-scale
TL7824(G OUT)
DAC full-scale
TL7823(B OUT)
DAC full-scale