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Service Adjustment Procedures
Item/preparation
Adjustment Procedure
+B Voltage Confirmation
1. Operate the set.
2. Set controls:
1. Operate the set.
2. Set controls:
Bright..........................minimum
Contrast......................minimum
Volume........................minimum
Contrast......................minimum
Volume........................minimum
1. Pin 1 of connector P13 on P-Board : 140.0 ± 2.0V
2. Pin 1 of connector P12 on P-Board : 15.0 ± 2.0V
3. Pin 5 of connector P11 on P-Board : 9.0 ± 2.0V
4. Pin 1 of connector P15 on P-Board : 21.0 ± 2.0V
5. Pin 6 of connector P15 on P-Board : -21.0 ± 2.0V
6. Pin 1 of connector P11 on P-Board : 32.0 ± 2.0V
7. Pin 6 of connector P13 on P-Board : 10.0 ± 2.0V
2. Pin 1 of connector P12 on P-Board : 15.0 ± 2.0V
3. Pin 5 of connector P11 on P-Board : 9.0 ± 2.0V
4. Pin 1 of connector P15 on P-Board : 21.0 ± 2.0V
5. Pin 6 of connector P15 on P-Board : -21.0 ± 2.0V
6. Pin 1 of connector P11 on P-Board : 32.0 ± 2.0V
7. Pin 6 of connector P13 on P-Board : 10.0 ± 2.0V
High Voltage
1. Remove Red CRT anode lead from Distributor by grasping
1. Remove Red CRT anode lead from Distributor by grasping
anode lead protective cap top and squeeze it against the
locking cap body under the protective cap.
Rotate 1/4 turn and pull anode lead sleeve out of distribu-
tor connector. Discharge anode lead to CRT metal chas-
sis.
locking cap body under the protective cap.
Rotate 1/4 turn and pull anode lead sleeve out of distribu-
tor connector. Discharge anode lead to CRT metal chas-
sis.
1. Receive a Black Signal.
2. Confirm that high voltage is 31.5 ± 1.0kV.
2. Confirm that high voltage is 31.5 ± 1.0kV.
High Voltage Correct
1. Connect DC voltmeter to TPX3(+) and TPX4(GND) on X-
1. Connect DC voltmeter to TPX3(+) and TPX4(GND) on X-
Board.
2. BRIGHT : 0 CONTRAST : 0
3. Receive a Black signal.
3. Receive a Black signal.
1. Set the data of Market mode CHK4 is as follows:
H-CORRECT : 7
V-CORRECT : 9
V-CORRECT : 9
2. Adjust R1501 (X-Board) so that the value of DC volt- meter
become 6.1 ± 0.2V.
RF AGC (Main picture) (Market mode CHK2)
1. Receive a colour bar pattern.
2. Set the input level to 62dB (+1/-2dB)
1. Receive a colour bar pattern.
2. Set the input level to 62dB (+1/-2dB)
(75
opened)
3. Connect an oscilloscope to TPA12 with DC mode.
1. Set the TV to Market mode [CHK2].
2. Adjust RF AGC Control so that the voltage at TPA12
2. Adjust RF AGC Control so that the voltage at TPA12
becomes 6.2 ± 0.5V.
3. Increase the input level by 2dB and confirm that the volt-
age changes.
RF AGC 2 (Sub picture)
1. Receive a colour bar pattern.
2. Set the input level to 70dB (+1/-2dB)
1. Receive a colour bar pattern.
2. Set the input level to 70dB (+1/-2dB)
(75
opened)
3. Connect an oscilloscope to TPA20 with DC mode.
1. Adjust TNR002 so that the
voltage at TPA8 becomes
6.2 ± 0.5V.
6.2 ± 0.5V.
2. Increase the input level by
2dB and confirm that the
voltage changes.
voltage changes.
Sub Contrast (Market mode CHK3)
1. Receive a colour bar pattern.
2. Connect an oscilloscope to TPA41 (A-Board).
3. Connect a short jumper between TPD6 and D29 (D-
1. Receive a colour bar pattern.
2. Connect an oscilloscope to TPA41 (A-Board).
3. Connect a short jumper between TPD6 and D29 (D-
Board).
4. Set controls:
Picture menu..........DYNAMIC NORMAL
AI............................OFF
AI............................OFF
1. Adjust Sub Bright Control.
a=2.3 ± 0.2Vp-p
2. Adjust Sub Contrast Control.
b=2.7(+0.05, -0.15)Vp-p
Adjust
TNR002
(Top View)
100% white
Black level
DC=0V
b
a
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