Panasonic TC-20KL03A, Руководство по обслуживанию

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TC-20KL03A / TC-29KL03A
ADJUSTMENTS
ITEM / PREPARATION PROCEDURE
2- VIF DETECTOR OUTPUT LEVEL
CONFIRMATION
CONFIRMATION :
1. Install the chassis in the VIF calibration JIG and tune in a
63 dBU colorbar sign (75W open).
2. To connect the oscilloscope in TPA33.
3. To confirm that the output video sign is 1.05 ± 0.15 Vp-p
in TPA 33.
3- BUZZING CONFIRMATION
(AUDIO CIRCUIT)
1. Connect the oscilloscope with a 7kHz filter between
TPA41 and ground or between the speaker’s terminals
2. Adjust the sound to the maximum..
3. BALANCE : CENTER
SURROUND : OFF
AVL : OFF
SOUND MENU : DIALOGUE
CONFIRMATION:
1.
Supply a colorbar signal channel 2, with local frequency
adjusted and the AFC turned on (Channel with sound
bearer and without modulation).
2.
Assure that the width in the buzzing waveform is smaller
than 500 m Vp-p.
1- RF AGC ADJUSTMENT
1.
Supply a color bar pattern and adjust the RF input signal
of to 69 dB.
2.
Connect the digital multimeter in TPA15.
ADJUSTMENT:
1. Select “RF AGC” in the “CHK2” service mode.
2. Adjusts "RF AGC" pressing VOL(+) or (-) until obtaining
2.2±0.1V in TPA20.
3. Increase the input level by +2 dB and confirm that the
voltage decrease.
CONFIRMATION
1.
Connect a voltage meter between TPA12 and ground.
Confirm that the vB is within a range of 140.5V±
1.5V
2.
Connect a high frequency voltage meter (VRMS.) among
the heater, and confirm that the voltage is
as below:
3.
Connect the high voltage meter in the CRT anode pin,
and confirm that the high voltage is within a range of
[A].
4-
ANODE AND HEATER VOLTAGE CONFIRMATION
1.
Supply a crosshatch signal.
2.
Adjust the bunch current in zero. (0 beam).
3. Adjust “SCREEN VR” and “CONTRAST” to minimum.
20” PHILIPS A48EAK01X 6,15 ± 0,20 Vrms
20” SAMSUNG A48KRD89X 6,30 ± 0,24 Vrms
29” PHILIPS A68AJB82X 6,30 ± 0,24 Vrms
CRT [A] KV
29” 30,5 ~ 27,6
20” 27,2 ~ 25,0