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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.
18. Convergence adjustment
Turn PTV on and allow it to warm up for 30 minutes prior to perform adjustments (apply a WHITE
PATTERN).
Helpful Hint:
EEPROM jig can be used to adjust convergence, by copying convergence adjustment from a
convergence adjusted PTV to other. Refer to EEPROM copy jig section on this service manual.
Also EEPROM copy jig can be used to back-up the data before to performadjustments.
NOTE:
1080i, 480p, 480i pattern can be obtained from Panasonic's TU-DST51 set-top box DTV decoder.
IMPORTANT NOTICE:
It is strongly recommended to first read and understand the following section prior to make any
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