Panasonic TC-14Z88AQ Service Manual

Item / Preparation Adjustment Procedure+B Voltage Confirm the DC voltage at the indicated test points, as:1. Operate the TV set. TPA 10 : 141.0 ± 2.0V2. Set control as follows : TPA 8 : 8 ± 1VBrightness ........... minimum TPA 9 : 5 ± 1VContrast .............. minimum TPA 21 : 175 ± 15RF AGC1. Receive a colour bar signal at an RFlevel of 69 +1-2 dBU with 75loaded.1. Select “RF AGC” indication in CHK2, on Screen bycontrol at factory mode.2. Connect digital multimeter to RFAGC at Tuner.2. Set RF AGC by using remote control Volume (+) or(-) button until voltage AGC at Tuner reaches 2.6 ± 0.1VTPA 15 (Tuner point).3. Increase RF signal strength by 2dB, confirm AGC atvoltage drop.High Voltage1. Receive the crosshatch pattern. 1. Connect a DC voltage meter to TPA 12 and confirmvoltage is 141.0 ± 2.0V.2. Set to 0 Beam.Screen VR .......... minimum 2. Connect a high frequency voltmeter to heater and confirmthat voltage reads 6.0 ± 0.24 (VRMS).Contrast .............. minimum3. Normalize the brightness and contrast.Item / Preparation Adjustment ProcedureNTSC TINT COLOURConnect a short jumper between TPA10 and TPA 20.Press Main Menu and set system touse AV-NTSC (3.58 MHz).DYNAMIC ................. NormalChannelCLR Set ..... STD1. Adjust Sub-Tint so that No. 2, 3 and 4 becomes levelwaveform is similar to Fig. 3.2. Confirm phase at Tint is changes more than ± 30 bycontrol.3. Confirm that colour level is maximum when colouradjusted to maximum position.Note: Use remote control only when adjusting userSub-Tint.