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4.1.1. +B Voltage
Item / preparation
1. Operate the TV set.
2. Set control as follows :
1. Operate the TV set.
2. Set control as follows :
Brightness ........... minimum
Contrast ............... minimum
Contrast ............... minimum
Adjustment procedure
1. Confirm the DC voltage at the indicated test points, as
1. Confirm the DC voltage at the indicated test points, as
follows :
TPA 15 : 3.3 ± 0.2V
TPA 16 : 141 ± 2V
TPA 17 : 8 ± 0.2V
TPA 18 : 1.8 ± 0.2V
TPA 19 : 5 ± 0.2V
TPA 20 : 220 ± 15V
TPA 15 : 3.3 ± 0.2V
TPA 16 : 141 ± 2V
TPA 17 : 8 ± 0.2V
TPA 18 : 1.8 ± 0.2V
TPA 19 : 5 ± 0.2V
TPA 20 : 220 ± 15V
4.1.2. RF AGC
Item / preparation
1. Receive a colour bar signal at an RF level of 69 ± 2 dBU
1. Receive a colour bar signal at an RF level of 69 ± 2 dBU
with 75
Ω
loaded.
2. Connect digital multimeter to RF AGC at Tuner.
Adjustment procedure
1. Select “RF AGC” indication in CHK2, on Screen by remote
Adjustment procedure
1. Select “RF AGC” indication in CHK2, on Screen by remote
control at factory mode.
2. Set RF AGC by using remote control Volume (+) or Volume
(-) button until voltage AGC at Tuner reaches 2.6 ± 0.1V at
TPD 30 (Tuner point).
TPD 30 (Tuner point).
3. Increase RF signal strength by 2dB, confirm AGC at Tuner
voltage drop.
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
3. Full degauss the picture tube by using an external
degaussing coil. By rotating R-B static convergence
magnet.
magnet.
4.1.3. High Voltage
Item / preparation
1. Receive the crosshatch pattern.
2. Set to 0 Beam.
1. Receive the crosshatch pattern.
2. Set to 0 Beam.
Screen VR .......... minimum
Contrast .............. minimum
Contrast .............. minimum
Adjustment procedure
1. Connect a DC voltage meter to D866 and confirm the +B
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.
4.1.4. NTSC TINT COLOUR
Item / preparation
1. Connect oscilloscope probe to TPL1 (R OUT) with 10k
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
DYNAMIC ................... Normal
Channel CLR Set ..... STD
Adjustment procedure
1. Adjust Sub-Tint so that No. 2, 3 and 4 becomes level
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.
Note: Use remote control only when adjusting user mode to
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
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
7
TX-29FG20T
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