Panasonic TC-29EG20TS Service Manual ▷ View online
2 Service Hints
2.1. HOW TO MOVE CHASSIS INTO SERVICE POSITION.
1. Remove 9 screws.
2. Draw out Main Chassis.
3. Stand the Main Chassis.
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TC-29EG20TS
1. Key 3 / 4
previous / next service 1 item
2. Key 8 / 9
adjust user brightness (-/+)
3. Program up / down
program position up / down
4. Volume +
increment of selected item
1. H-POS
-128~127
2. V-POS
-128~127
3. H-AMP
-128~127
4. V-AMP
-128~127
5. EW-AMP1
-128~127
6. LOW_Corner
-128~127
7. TRAPEZ 1
-128~127
8. UPPER_Corner
-128~127
9. V-LIN
-128~127
10. V-SYM
-128~127
1. Key 3 / 4
previous / next service 2 item
2. Key 8 / 9
toggle for options bit 0 - 7
3. Program up / down
program position up / down
4. Volume +
increment of selected item
5. Volume -
decrement of selected item
6. OK (remote)
store / save selected item
7. Normal (remote)
exit service mode
11. ANGEL
-128~127
12. BOW
-128~127
13. DVCO
-128~127
14. H-POS
-128~127
15. G-CUT OFF
N / A
16. B-CUT OFF
0~511
17. R-DRIVE
0~511
18. G-DRIVE
0~511
19. B-DRIVE
0~511
20. SUB-Bright
-128~127
5. Volume -
decrement of selected item
6. OK (remote)
store / save selected item
7. Normal (remote)
exit service mode
NOTE: Service mode 2 options bit refer to each model spec.
3 Market Mode Function
3.1. Service Mode Access
1. Set timer ON.
2. Press remote’s RECALL (
) and panel’s volume down key simultaneously to enter SERVICE 1.
3. Set to normal mode : Press the volume down button on front, together press the off timer button on remote control.
3.2. Service Mode 1 Controls
3.3. Service Mode 1 Function
3.4. Service Mode 2 Controls (OPTION data 1 ~ 3)
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TC-29EG20TS
4.1.1. +B Voltage
Item / preparation
1. Operate the TV set.
2. Set control as follows :
Brightness ........... minimum
Contrast ............... minimum
Adjustment procedure
1. Confirm the DC voltage at the indicated test points, as
follows :
TPA 15 : 3.35 ± 0.2V
TPA 16 : 141 ± 2V
TPA 17 : 8.2 ± 0.3V
TPA 18 : 1.9 ± 0.2V
TPA 19 : 5.2 ± 0.2V
TPA 20 : 220 ± 15V
1. Set Bright and Contrast controls to their maximum
positions.
2. Operate the TV set over 60 minutes.
3. Full degauss the picture tube by using an external
degaussing coil. By rotating R-B static convergence
magnet.
magnet.
4.1.2. High Voltage
Item / preparation
1. Receive the crosshatch pattern.
2. Set to 0 Beam.
Screen VR .......... minimum
Contrast .............. minimum
Adjustment procedure
1. Connect a DC voltage meter to D866 and confirm the +B
voltage is 141.0 ± 2V.
2. Connect a high frequency voltmeter to heater and confirm
that voltage reads 6.3 ± 0.28 (VRMS).
3. Normalize the brightness and contrast.
4.1.3. NTSC TINT COLOUR
Item / preparation
1. Connect oscilloscope probe to TPL1 (R OUT) with 10k
Ω
series resistor.
2. Press Main Menu and set system to use AV-NTSC (3.58
MHz).
DYNAMIC ................... Normal
Channel CLR Set ..... STD
Adjustment procedure
1. Adjust Sub-Tint so that No. 2, 3 and 4 becomes level
waveform is similar to Fig. 3.
2. Confirm phase at Tint is changes more than ± 15 by Tint
control.
3. Confirm that colour level is maximum when colour DAC is
adjusted to maximum position.
Note: Use remote control only when adjusting user mode to
Sub-Tint.
Sub-Tint.
4. Apply a crosshatch pattern signal and adjust roughly the
static convergence magnets.
5. Apply a green pattern signal.
6. Loosen a clamp screw for the Deflection Yoke and move
the Deflection Yoke as close to the purity magnet as
possible.
possible.
4 Adjustment Procedure
4.1. Adjustment Procedure
4.2. COLOUR PURITY
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TC-29EG20TS
7. Adjust the purity magnet so that a vertical green field is
obtained at the center of the screen.
8. Slowly press the Deflection Yoke and set it where a uniform
green field is obtained.
9. Adjust roughly the Low Light controls and make sure that a
uniform white field is obtained.
10. Tighten the clamp screw.
4.3. CONVERGENCE
1. Apply a crosshatch pattern signal and set Contrast control
to the maximum position.
2. Adjust Bright control to obtain a clear pattern.
3. Adjust Red and Blue line at center of the screen.
4. Adjust Red and Blue with Green line at center of the screen
by rotating (RB)-G static convergence magnet.
5. Lock convergence magnets with silicone sealer.
6. Remove the DY wedges and slightly tilt the Deflection Yoke
vertically.
7. Fix the Deflection Yoke by re-inserting the DY wedges.
8. If purity error is found, repeat “Colour Purity” adjustment.
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TC-29EG20TS
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