Panasonic TC-21PM30R Service Manual

Contents

Panasonic TC-21PM30R Service Manual Manual pdf 8 page image

Adjustment ProcedureItem / Preparation Adjustment Procedure+B Voltage1. Operate the TV set. Confirm the DC voltage at the indicated test points,as follow :2. Set control as follow : TPA 12 : 141.2 +- 0.8V TPA 21 : 215 +- 15VBrightness ..... minimum TPA 11 : 8 +- 1VContrast ........ minimum TPA 10 : 5 +- 1VRF AGC1. Receive a colour bar signal at an 1. Select “RF AGC” indication in CHK 2, on ScreenRF level of 64(+0-1)dBU with 75 by remote control at factory mode.loaded.2. Connect digital multimeter to RF AGC 2. Set RF AGC by using remote control volume (+)at Tuner. or volume (-) button until voltage AGC at Tunerreach 2.7 +- 0.1V.3. Increase RF signal strenght by 2dB, confirmAGC at Tuner voltage drop.High Voltage1. Receive the crosshatch pattern. 1. Connect a DC voltage meter to TPA 12and confirm the +B voltage is 141.2 +- 0.8V.2. Set to 0 Beam . 2. Connect a high frequency voltmeter to heater andScreen VR ..... minimum confirm that voltage reads 6.3+- 0.24 (VRMS).Contrast ....... minimum 3. Normalize the brightness and contrast.Item / Preparation Adjustment ProdureConnect oscilloscope probe to TPA32(R-OUT) with 10Kohm series resistor.Connect a short jumper between TPA 10 1. Adjust Sub-Tint so that No.2,3 and 4 becomesand TPA 20. level waveform is similiar to Fig. 10.Press Main Menu and Set system to 2. Confirm phase at Tint is changes more thanUse AV-NTSC (3.58MHz). +/- 30 by Tint control.DYNAMIC ....... Normal 3. Confirm that colour level is maximum whencolour DAC is adjusted to maximum position.Note:Use Remote control only when adjusting user modeto Sub-Tint.0.5aa7 8 9 101 2 3 4 5 6Fig. 10Ω