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VL-AX1S/H/E/EW/EX
(Wiring board diagram: Main Side B)
TL8843(VB)
VF sub-brightness R/B
TL8861(BLD)
VF VCO
TL8841(VG)
VF COM-DC
VF brightness
VF contrast
VFγ1
VF sub-brightness R/B
TL8840
VF COM-DC
TL8842(VR)
VF sub-brightness R/B
7. VF VCO adjustment
Test point
TL8861(BLD)
Mode
VCR AV input
Procedure
1) Connect TL7801 to GND. (No signal)
2) Connect TL8861 to the frequency counter, and adjust the frequency to the specified adjustment value with the
VCR ADJ E1.
15.625 ± 0.1KHz
Adjustment
rating
Examples
• During IC705 or IC8800 replacement.
8. VF COM-DC adjustment
Test point
TL8840
Mode
VCR AV input
Procedure
1) Input the signal of a 3-step waveform.
2) Read the DC voltage value of the output of TL8841 with the digital voltmeter. (VG
3) Similarly rad the DC voltage value of the output of TL8840 with the digital voltmeter. (VCOM
4) Adjust the value of (VCOM
-0.15 ± 0.1V
Adjustment
rating
Examples
• During IC705 or IC8800 replacement.
9. VF brightness adjustment
Test point
TL8841(VG)
Mode
VCR AV input
Procedure
1) Input the signal of a 3-step waveform.
2) Set VCR ADJ ED to 00.
3) Adjust the waveform pedestal range of TL8841 to the specified adjustment value.
4) Return VCR ADJ ED to the initial value. (Initial value: 7A)
7.4Vp-p ± 0.1Vp-p
Adjustment
rating
Examples
• During IC705 or IC8800 replacement.
R1721
TL5770
R1720
C451
C4702
TL3321
TL5767
C407
R406
R411
Q1947
C404
TL3320
TL3322
TL403
TL5776
R520
R519
C513
R516
C515
TL416
R518
C516
TL417
R517
C514
TL8855
R537
TL4436
R2516
R2509
TL8861
R2512
TL5768
R2514
C2516
C2515
TL783
TL5756
R2589
R2592
R2590
C2548
TL5761
C2546
TL5760
TL5759
Q2510
TL5758
R2832
R2812
C2807
TL8840 T L8842 T L8841 T L8843
D2801
TL911
TL2804
R2814
Q2800
TL2811
R2811
R2605
R2617
R2610
TL2813
R2810
TL2812
C2808
C2551
TL2803
TL2814
R2825
R2831
TL2817
R2823
R2623
TL2818
R2818
TL1480
R2822
TL2816
TL2819
R2820
TL2815
TL1477
R2819
TL2820
R2824
TL1908
TL2825
TL1913
SC1401
TL1909
TL2834
TL2833
TL1475 T L1478
TL1481 T L1479
- VG
) to the specified adjustment value.
DC
DC
Sig. center
GND
C701
R1912
D1900
Q1920
TL5781
R780
C237
TL5780
R506
TL4440
IC501
TL7800
R509
C507
R526
C231
C202
C501
L501
TL5789
TL5790 T L5788
TL4405
TL4403
TL4404
C224
TL5786
TL912
R205
TL7801
R2503
R2505
C2501 C2510
C2513
C222
Q2502
TL5752
C5702
C5704
TL5778
C5703
Q2504
R2534
C5701
C239
IC2501
C210
C208
R235
Q2508
C2511
L2502
C2507
C2509
C2503
C204
TL2800
TL2801
TL2802
SC701
SC2501
TL1431 TL239TL245TL244TL243TL242TL241TL235TL240
Address
VCR ADJ E1
Address
VCR ADJ F6
Address
VCR ADJ E0
7.4Vp-p
0.1Vp-p
30
R1943
R1940
C1921
Q1938
R1934
R1935
C238
IC202
TL7801
TL7823
C226
C227 C228 C240
C235
VF VCO
TL908
TL4441
IC201
C215
C212
C211
C209
R251
R255
R257
TL234
TL4437
TL4438
TL4439
TL233
TL202
TL201
R258
TL238
TL237
TL236
SC201
TL1420
)
DC
)
DC
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