31
VL-AD260U
5. VCO adjustment
Measuring point
TL1801 (COM)
Address
037
Mode
VCR
Adjusting method
1) Set the data of address 0A5 at the address 80.
2) Connect TL1800 to GND.
3) Connect the Digital voltmeter to TL1801 (COM), and adjust the DC Volt.
Adjustment standard 6.85V
±
50mV
Remarks
———————
7. COMMON PULSE adjustment
6. H-position adjustment
t
V
Measuring point
LCD panel display surface
Address
03C
Mode
VCR
Adjusting method
1) Set data of address 0A5 at the address 80 and address 082 at the address A9.
2) Set the illuminometer (TOPCON IM-3) on the LCD panel surface (do not allow entry of external light).
3) Connect the illuminometer to the oscilloscope.
4) Make an adjustment so as to minimize the ripple of output waveform.
Response time: 0.6 sec
5) Adjust again if longitudinal stripe appears evidently.
6) Set data of address 082 at the address 40. (Restore)
* Or set to the point where the black is settled deepest with the grey scale signal.
Adjustment standard Minimum
Remarks
Make an adjustment after aging for 5 minutes or more.
8. COM-BIAS adjustment
Measuring point
LCD panel display surface
Address
090, 092
Mode
VCR
Adjusting method
1) Set data of address 0A5 at the address 80, and address 082 at the address A9.
2) Adjust so as to get the same white screen as that of standard monitor. (Adjust again, visually checking as
stated in item 3. 4.)
3) Set data of address 082 at the address 40. (Restore)
Adjustment standard Standard monitor
Remarks
Make an adjustment after aging for 5 minutes or more.
9. W/B adjustment
Measuring point
TL3802 (LCD-HD)
Address
03E
Mode
VCR
Adjusting method
1) Connect TL3803 to GND.
2) Connect the frequency counter to TL3802 (LCD-HD), and adjust the frequency.
Adjustment standard 15.734kHz
±
100Hz
Remarks
———————
Measuring point
TL3802 (LCD-HD)
Address
03B
Mode
VCR
Adjusting method
1) Connect the oscilloscope to TL3802 (LCD-HD), and adjust the
pulse width.
Adjustment standard 3.7
µ
sec
±
0.15
µ
sec
Remarks
———————
Summary of Contents for VL-AD260U
Page 66: ...VL AD260U A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 85 VCR PWB Wiring Side SIDE A ...
Page 68: ...VL AD260U A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 87 VCR PWB Wiring Side SIDE B ...
Page 70: ...VL AD260U A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 89 CAMERA PWB Wiring Side SIDE A ...
Page 72: ...VL AD260U A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 91 CAMERA PWB Wiring Side SIDE B ...
Page 76: ...VL AD260U A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 95 HEAD AMP PWB Wiring Side SIDE A ...
Page 77: ...VL AD260U A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 96 HEAD AMP PWB Wiring Side SIDE B ...
Page 96: ...115 Ref No Part No Description Code Ref No Part No Description Code VL AD260U ...