Panasonic TC-20KL03A, Руководство по обслуживанию

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TC-20KL03A / TC-29KL03A
7- MTS CALIBRATION
1. Connect the RMS voltage meter through the JIG filter in
TPA44.
2. Connect the RF generator in the tuner terminal.
3. Adjust “AVL” to ON.
ADJUSTMENT :
1. Supply the signal through RF antenna input.
VIDEO : 100 IRE FLAT FIELD , 30% of modulation.
AUDIO : 300 Hz , 100% of modulation, monoaural (70 ±
5dB, open, 75W, P/S 10dB) 75 µs with pre-enfasis OFF.
2. Adjust INPUT LEVEL (CHK5) to obtain 106 ± 6 mVrms
in the RMS voltage meter.
ADJUSTMENTS
ITEM / PREPARATION PROCEDURE
5- PAL COLOR OUTPUT SIGNAL ADJUSTMENT
1. Supply a color bar signal and adjust the local frequency.
2. Adjust “IMAGE” to DYNAMIC NORMAL, “CONTRAST” to
63 and “SUB-CONTRAST” to 21.
3. Adjust the “COLOR FOR CHANNEL” level to NORMAL.
4. Set the CHK2 service mode option, press “5” on the remote
control unit and confirm that OSD becomes blue (AKB
turned off).
5. Connect a short circuit jumper between TPA10 and TPA20.
6. Adjust [A] for 2.3 ± 0.2V through the BRIGHT control
variation in the test point TPL2.
7. Confirm:
CRT 20” 29”
RGB Contrast 7 DAC 9 DAC
{354} 17 19
8. Fix G-DRIVE GAIN, R-DRIVE GAIN and B-DRIVE GAIN
data in 1FH or 31 DAC.
R-DRIVE GAIN: [SLV(8A), SUB (16)]
G-DRIVE GAIN: [SLV(8A), SUB (17)]
B-DRIVE GAIN: [SLV(8A), SUB (18)]
CALIBRATION:
1. Connect the oscilloscope in TPL2 (G-OUT) with a 10K Ω
resistor and adjust “CONTRAST”, so that the [ B ] waveform
it is 2.6±0.1V according to fig. 1.
2. Adjust “SUB-COLOR” to obtain 2,45±0.1V in [ D ]
according to fig. 1.
3. Connect the oscilloscope in TPL1 (R-OUT) with a 10K Ω
resistor and confirm that the [ C ] waveform it is 2.45±0.1V
according to fig. 2.
4. Remove the jumper between TPA10 and TPA20, press
the key “5” (AKB ON) and confirm that OSD becomes
white.
Fig. 1
A = 2.3 ±0.2Vo-p
B = 2.4±0.1V
D = 2.45±0.1V
Fig. 2
A = 2.3 ±0.2Vo-p
C = 2.45±0.1V
6- NTSC SUB-TINT CALIBRATION
1. Connect the oscilloscope in TPL2 (R-OUT) with a 10KW
resistor.
2. Supply a Rainbow signal (NTSC 3.58 MHz) through
VIDEO IN.
3. Adjust “IMAGE” to DYNAMIC NORMAL.
4. Adjust “COLOR FOR CHANNEL” to NORMAL.
5. Set the CHK2 service mode option, press “5” on the
remote control unit and confirm that OSD becomes blue
(AKB turned off).
6. Connect a short circuit jumper between TPA10 and
TPA20.
Fig. 1 Fig. 2
NTSC 3.58 COLOR SYSTEM CALIBRATION
1. Adjust [C] for 5.0±0.2V through the BRIGHT control
variation (CHK2) according to fig. 1.
2. Adjust the NTSC SUB-TINT level according to fig. 1
positions 2, 3 and 4.
3. Remove the jumper.
4. Press “5” and confirm that OSD becomes white (AKB
turned on).