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Chassis Service Adjustment Procedures
All service adjustments are factory preset and should not require adjustment unless controls and/or
associated components are replaced.
Note: Connect the (-) lead of the voltmeter to the appropriate ground. Use heat sink when the HOT ground symbol
( ) is used. Otherwise, use COLD ground (
) — Tuner shield.
140.0V B+ Voltage Confirmation
1.
Set the Bright and the Picture to Minimum by
using the Picture Menu.
2.
Connect the DVM between
TPP12
(+ side) and cold
ground (
). (In P-Board).
3.
Confirm that B+ voltage is 140.0V ± 1.5V. This
voltage supplies B+ to the Horizontal Output &
Flyback circuits.
P-Board B+ Voltages
120V AC line input. Set the Bright and the Picture to
Minimum by using the Picture Menu. Use cold ground
(
) for the (-) lead of the DVM.
.
A-Board B+ Voltages
120V AC line input. Set the Bright and the Picture to
Minimum by using the Picture Menu. Use cold ground
(
) for the (-) lead of the DVM.
Adjust Picture Menu for normalized video adjustments.
T
U
N
E
R
TP
1
8
A/V REAR INPUTS
IC101
P-BOARD
A-BOARD
IC2301
IC6501
T801
Q801
IC001
IC451
IC3001
Q551
C 584
-
+
C 583
-
+
C 047
-
+
C 003
-
+
TPD7
TPD8
TPD9
TPD3
IC4802
IC4801
TPD12
TPD11
TPD10
LOCATION
(P-Board)
VOLTAGE
Board
connected
VOLTAGE
Board
w/o connect
TPP12
B+
140.0V ± 1.5V
90.0V ± 9V
TPP11
STBY 12
13.0V ± 2V
8.2V ± 1V
TPP10
SOUND
33.0V ± 5V
25.0V ± 3V
For Sound GND use connector P1-pin 5
LOCATION (A-Board)
VOLTAGE
C584 (+)
MAIN 9
9.0V ± 0.5V
C583 (+)
MAIN 5
5.0V ± 0.3V
TPD9
MAIN -15
-15V ± 2V
TPD3
MAIN 15
15V ± 2V
TPD8
MAIN 7.5
7.1V ± 1.0V
C047 (+)
ST-BY
3.3V ± 0.2V
TPD7
MAIN 220
220V ± 9.0V
