Ⅵ． Electrical Adjustment - Haier 29FV6H Service Manual

VI. ELECTRICAL ADJUSTMENT
A. Safety precautions
1. It is safe to adjust after using insulating transformer between the power supply
line 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 by the correct appliances. But this is changeable
in view of productivity.
B. Adjustment procedure
The chassis of this TV set uses Toshiba single chip IC with the latest digital bus
processing technology. The adjustment points are fewer and the adjustment is
simpler. The adjustment method is as follows:
1. Screen VR adjustment
1) Receive special.
2) Press picture select on remote controller to enter dynamic pattern.
3) Adjust screen vr until bright is suitable.
2. Adjustment of vertical and horizontal positions
1) Receiver PAL system "MONO SCOPE" signal.
2) Adjust "HPOS" bus data to make horizontal position in the center of the screen.
3) Adjust "VP50" bus data to make vertical position in the center of the screen.
3. Adjustment of vertical and horizontal ampl
1) Receive PAL system "MONO SCOPE" signal.
2) Adjust "WID" bus data to make "MONO SCOPE" signal vertical weight rate is "5".
3) Adjust "HIT" bus data to make "MONO SCOPE" signal vertical weight rate is "4".
4. Focus adjustment
1) Receiver PAL system "MONO SCOPE" signal.
2) Connect the negative end of the digital display voltmeter to earth and the positive
to TP-A of AGC input.
4) Adjust FOCUS VR until the optimum picture is achieved.
25