HITACHI HDT51 - HDT61 PLASMA POWER PWB ADJUSTMENT

HITACHI HDT51 - HDT61 PLASMA POWER PWB ADJUSTMENT

ADJUSTMENT TO POWER SUPPLY PWB AFTER REPLACEMENT

• Vs & Va VOLTAGE ADJUSTMENT [Label Location]

• Turn on the set and perform pre-heat run more than 1 minute with a snow noise screen.
• Receive full black pattern (blanking level) signal (or Video No signal; in this case, it will be automatically turned off after a few seconds because of power save function).
• Connect voltmeter leads to the Vs or Va and GND test points on power unit.  (Measurement error of voltmeter should be Less than 0.02V)

Adjustment

1. Turn Vs ADJ to adjust Vs voltage to be within 0.1V of the value specified in the label on the panel. *1
2. Turn Va ADJ to adjust Vs voltage to be within 0.2V of the value specified in the label on the panel. *1
3. Reconfirm that Vs voltage remains within 0.1V of the value. Readjust if it's outside the margin.

Remarks

[LOT] N6

Vs=80.0V Va=60.0V

V• =140.0V Vx=60.0V

*1. Permissive level of voltage in case sufficient time of heat-run performed. 

Vs: within 0.45V, Va: within 0.55V

Power PWB

Click on image.