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4.3. Adjustment for CRT CUT OFF
Preparation:
1. Connect the oscilloscope probe to (GREEN CATHODE) on L Board.
2. Screen VR min.
3. Set the data Sub Bright, Bright.
4. In service Mode at “Bright” dac press [5] in factory mode to enter vertical line and adjust by volume down or up button.
5. Adjust “Screen VR” to set voltage as in Table 1.
1. Connect the oscilloscope probe to (GREEN CATHODE) on L Board.
2. Screen VR min.
3. Set the data Sub Bright, Bright.
4. In service Mode at “Bright” dac press [5] in factory mode to enter vertical line and adjust by volume down or up button.
5. Adjust “Screen VR” to set voltage as in Table 1.
4.4. Adjustment Procedure
4.4.1. +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 follows :
1. Confirm the DC voltage at the indicated test points, as follows :
TPA 15 : 3.35 V ± 0.2
TPA 16 : 141 V ± 2
TPA 17 : 8.2 V ± 0.35
TPA 18 : 1.85 V ± 0.15
TPA19 : 5.30 V ± 0.2
TPA20 : 220 V ± 15
TPA 16 : 141 V ± 2
TPA 17 : 8.2 V ± 0.35
TPA 18 : 1.85 V ± 0.15
TPA19 : 5.30 V ± 0.2
TPA20 : 220 V ± 15
4.4.2. 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 TPA 16 and confirm that the +B voltage is 141.0 V ± 2.
2. Connect a high frequency voltmeter to heater and confirm that voltage reads 6.3 V (RMS) ± 0.3.
3. Normalize the brightness and contrast.
1. Connect a DC voltage meter to TPA 16 and confirm that the +B voltage is 141.0 V ± 2.
2. Connect a high frequency voltmeter to heater and confirm that voltage reads 6.3 V (RMS) ± 0.3.
3. Normalize the brightness and contrast.
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TX-29RX20T
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