Clock Adjustment (Clock) - Panasonic PT-53X54J Service Manual

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17.16 Clock Adjustment (CLOCK)

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Preparation:
Connect the frequency counter from TP24 (A-Board) to cold ground.
Note:
Frequency Counter probe capacitance should be 8pF or less.
Procedure:
1. Turn the PTV ON with the A.C. power applied.
2. Measure TP24 (A-Board) for frequency and record the reading.
Note:
Pin measurement must have at least four digits of resolution following the decimal point. Example: 000.0000
3. Place the PTV into service mode for making electronic adjustment, select the clock adjustment DAC CLOCK and change
value to 128.
4. Calculate and set CLOCK based on the following formula:
Note:
TP24 measurement will not change regardless of the value stored in CLOCK.
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