Service manual

6-7
VL-H870U
VL-H875U
VL-H890U
VL-H870U
VL-H875U
VL-H890U
2. Adjustment of EE Y level
Measuring instrument Oscilloscope
Mode VCR STOP
Input signal Color bar
Measuring point TL3402, TL8356 (GND)
Adjustment address 32
Adjustment level 500 ± 20 mVp-p
(1) Input the color bar signal into the video input/output terminal in the VCR STOP mode.
(2) Enter the VCR adjustment mode with an adjustment remote control, and select the address 32.
Select the address, using the FF or REW key, and fix it with the PB key.
(3) Make an adjustment so as to get 500 mVp-p between SYNC TIP and WHITE PEAK on TL3402.
Select the data, using the FF or REW key, and fix it with the PB key.
After the adjustment, press the STOP key, and exit from the adjustment address 32.
500 ± 20 mVp-p
Minimum chroma component
3. Adjustment of comb filter
Measuring instrument Oscilloscope
Mode VCR STOP
Input signal Color bar
Measuring point TL414, TL8356 (GND)
Adjustment address Phase: 36, Gain: 37
Adjustment level Minimum chroma component
(1) Input the color bar signal into the video input/output terminal in the VCR STOP mode.
(2) Enter the VCR adjustment mode with an adjustment remote control, and select the address 36.
Select the address, using the FF or REW key, and fix it with the PB key.
(3) Make an adjustment so as to minimize the chroma component on TL414.
Select the data, using the FF or REW key, and fix it with the PB key.
After the adjustment, press the STOP key, and exit from the adjustment address 36.
(4) Enter the VCR adjustment mode with an adjustment remote control, and select the address 37.
Select the address, using the FF or REW key, and fix it with the PB key.
(5) Make an adjustment so as to minimize the chroma component on TL414.
Select the data, using the FF or REW key, and fix it with the PB key.
After the adjustment, press the STOP key, and exit from the adjustment address 37.
(6) Repeat the steps (2) - (3).
4. Adjustment of Y emphasis level
Measuring instrument Oscilloscope
Mode VCR STOP
Input signal Color bar
Measuring point TL408, TL8356(GND)
Adjustment address 56
Adjustment level 500 ± 20 mVp-p
(1) Input the color bar signal into the video input/output terminal in the VCR STOP mode.
(2) Enter the VCR adjustment mode with an adjustment remote control, and select the address 56.
Select the address, using the FF or REW key, and fix it with the PB key.
(3) Make an adjustment so as to get 500mVp-p between SYNC TIP and WHITE PEAK on TL408.
Select the data, using the FF or REW key, and fix it with the PB key.
After the adjustment, press the STOP key, and exit from the adjustment address 56.
Measuring instrument Oscilloscope
Mode PB
Input signal Color bar (JiGWR5-8NSE)
Measuring point TL405, TL8356(GND)
Adjustment address 57
Adjustment level 500 ± 20 mVp-p
(1) Set the color bar tape for alignment (JiGWR5-8NSE).
(2) Enter the VCR adjustment mode with an adjustment remote control, and select the address 57.
Select the address, using the FF or REW key, and fix it with the PB key.
(3) Make an adjustment so as to get 500mVp-p between SYNC TIP and WHITE PEAK on TL405
Select the data, using the FF or REW key, and fix it with the PB key.
After the adjustment, press the STOP key, and exit from the adjustment address 57.
5. Adjustment of Y de-emphasis (Hi-8)
Measuring instrument Oscilloscope
Mode PB
Input signal Color bar (JiGWR5-5NSP)
Measuring point TL405, TL8356(GND)
Adjustment address 62
Adjustment level 500 ± 20 mVp-p
6. Adjustment of Y de-emphasis (Normal-8)
(1) Set the color bar tape for alignment (JiGWR5-5NSP).
(2) Enter the VCR adjustment mode with an adjustment remote control, and select the address 62.
Select the address, using the FF or REW key, and fix it with the PB key.
(3) Make an adjustment so as to get 500mVp-p between SYNC TIP and WHITE PEAK on TL405.
Select the data, using the FF or REW key, and fix it with the PB key.
After the adjustment, press the STOP key, and exit from the adjustment address 62.
500 ± 20 mVp-p
500 ± 20 mVp-p
500 ± 20 mVp-p