Alignment And Adjustments - Haier TV-8888-09 Service Manual

Alignment and Adjustments

1. Please read and remember the contents of the user's manual and the warnings on
the back cover of the TV set carefully before using the machine especially the safety
instructions.
2. Keep the set away from heaters, ovens or such heating equipment.
3. Keep well ventilated.
4. Away from heavy dust and corrosive gas.
5. Not exposed to rain or mixture.
6. Away from strong magnetic object.
7. Don't move the machine while it's on. Please do it after you cut off the power.
8. Remove the outdoor antenna connection during thundering weather.
9. Remove the power plug from the socket for long-term power failure or absence.
Alignment:
1. Test equipment:
a. 45.75MHz sweep generator
b. 15V/3A DC power supply (with short and over current proof)
c. Digital multi-meter
d. If alignment tool
f. User Remote controller
g. Service remote controller
h. Video signal generator
i. Multi-system adjustment tool
j. 60MHz double trace oscillograph (2 units)
k. White balance adjustment instrument
2. Signal, power supply connection:
a. Connect +15V DC power supply to the +15V-testing top in the main PCB.
b. Input sweep signal into IF testing top
c. Connect multi-meter to PIF-TP testing top in PCB.
3. Alignment
a. Connect 45.75MHz sweep generator to IF test top in PCB
b. Adjust T101 and make digital multi-meter display 3.6V±0.05V. (PIF-TP top can
only connect to a multi-meter).
Alignment and check:
a. Connect main PCB with alignment tool, input factory adjustment signal, turn the
TV on. Adjust screen control on FBT and make screen brightness relevant receive
525-line monoscope, adjust focus control on FBT and make focus relevant.
b. Pre-adjust power voltage: adjust RP551 and make +B voltage be 136V±0.5V.
c. Check brightness, contrast, color, and sharpness: receive color bar signal and
adjust contrast, brightness, color, sharpness control, picture will change accordingly.
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