Haier TV-8888-09, Service Manual

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d. AV input check: press AV/TV button, screen will display AV mode or TV mode and
audio input signal can be observed, picture and sound must be normal.
Stereo adjustment:
Receive stereo signal (recommended audio: L 300Hz, R 3KHz).
Connect two inputs of double trace oscillograph into XS601, XS602
Note: Do not make XS601, XS602 outputs short.
Press FACTORY button on the service remote controller, enter “ADJUST” service
mode.
Press “CH+” or “CH-” select “WIDEBAND” item and adjust low frequency separation.
Refer to figure 1, and make it optimal refer to figure 2.
At last press “CH+” or “CH-” and select “SPECTRAL” item, adjust high frequency
separation. Refer to figure 3, and make it optimal refer to figure 4.
If effect still isn’t good, you can repeat above steps till it is optimal.
Figure 1 Figure 2
Figure
3 Figure 4
Main power adjustment:
Adjustment:
Connect voltage meter to +B on main PCB, ensure the +B voltage is 136V±0.3V.
Screen voltage adjustment:
Adjustment:
Turn TV on; receive a digital test pattern, set brightness and contrast standard
mode.
Press “FACTORY” button on the service remote controller twice, “B/W” balance
display on the screen, then press “MUTE” button, observe a horizontal bright line
display on the screen.
Adjust Screen voltage of FBT and observe the line seen. Then press “MUTE” button
and exit service mode. Press “P.STD” button and let the picture enter the standard
mode.