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ADJUSTMENT
1. Safety Precautions
1. It is safe to adjust after using insulating transformer between the power supply
and chassis input to prevent the risk of electric shock and protect the
instrument.
2. Never disconnect leads while the TV receiver is on.
3. Don't short any portion of circuits while power is on.
4. The adjustment must be done on the correct appliances. But this is changeable in
view of productivity.
2. Adjustment procedure
The chassis of this TV set uses Sanyo IC with the latest digital bus processing
technology. The adjustment points are fewer and the adjustment is simpler. The
adjustment method is as follows:
•
+B: 104± 1V adjustment
1)
Switch on the power and connect NTSC circular signals to the tuner.
2) Adjust variable resistor RP551 until the voltage of the main power is 104±1V.
•
Screen voltage adjustment
1) Switch on the power and receive NTSC system circular signal. Warm up the TV
set for 15 min.
2) Enter the adjustment state. Press the "MUTE" button, then a bright horizontal
line appears. Adjust screen potentiometer to let the horizontal line just appears.
•
Focus adjustment
1)
Receive electronic circular signal.
2)
Set picture mode on standard mode.
3)
Adjust focus potentiometer until the optimum picture is achieved.
•
White balance adjustment
1)
Set the picture mode on standard mode.
2)
Enter the D state and adjust RCUT, GCUT, BCUT, GDRV and BDRV.
3)
Coordinate of reference white color: (X=0.281, Y=0.311).
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