Panasonic KX-G8300 Service Manual And Technical Manual page 56

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4-10 Video Leveling Threshold Adjustment
(1) Use a multimeter (for DC voltage measurement) to read out the value at pin 12 of 1C13 on the signal
processor board. ;
(2) Adjust VR1 so that the reading on the multimeter indicates between 0.2V and 0.6 VDC.
Signal Processor Board (PQUP824ZA-A)
4-11 Contrast Adjustment
(1) Use a multimeter (for DC voltage measurement) to measure the voltage to ground at
C29 (+ Pin)on the processor board.
(2) Check that the reading on the multimeter is between 4.9 and 5.1 VDC. If necessary, adjust VR2.
Signal Processor Board (PQUP824ZA-A)
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CN2
a |
CN1
VR2
C29 @) CN4
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Fig. 57
4~-12-1 Vertical Sweep Frequency Adjustment
(1) | Proceed with the following adjustment to correct sync misalignment.
(2)
Rotate R405 in both the clockwise and counterclockwise directions, and set the control to virtually
the center of both points where sync misalignment starts to appear on the screen.