Chassis Service Adjustment Procedures - Panasonic CT-32SX31E Service Manual

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 (
A-BOARD
Q002
IC001
IC002
L008
IC2301
T
T
U
U
N
N
E
E
R
R
TP
8
MOMENTARILY CONNECT A JUMPER FOR ENTERING SERVICE MODE (TP8 to COLD GND)
140.0V B+ Voltage Confirmation
1. Set the Bright and the Picture to Minimum by
using the Picture Menu.
2. Connect the DVM between
ground ( ).
3. Confirm that B+ voltage is 140.0V ± 1.5V. This
voltage supplies B+ to the Horizontal Output &
Flyback circuits.
Source Voltage Chart
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.
.
LOCATION (D-Board)
TPP17 (by D825) +B2
TPP25 (by D827) 9V
(by Q804) 15V
TPP19
TPP20 (by C840) 15V (VER.)
TPP21 (by L826) -15V (VER.)
TPP22 ( by L824 ) SOUND
) — Tuner shield.
IC881
IC882
IC101
IC1801
C 30 23
IC3001
-
A/V REAR INPUTS
1
(+ side) and cold
TPP17
VOLTAGE
140.0V ± 1.5V
9.0V ± 1.5V
15.0V ± 2.0V
15.0V ± 1.5V
-15.0V ± 1.5V
32.5V ± 2.0V
D-BOARD
IC883
LOCATION (D-Board)
TPD7
LOCATION (A-Board)
TPA6
TPA7
TPA8
TPA16
TPA18
Adjust Picture Menu for normalized video adjustments.
High Voltage Check
1. Select an active TV channel and confirm that
horizontal is in sync.
2. Adjust Brightness and Picture using Picture Icon
menu so video just disappears.
3. Confirm B+ 140.0V is within limit.
4. Using a high voltage meter confirm that the High
Voltage is 31.0kV ± 1.0kV.
- 12 -
L826
Q804
L824
- +
C 84 0
T801
Q801
VOLTAGE
(by D511) 220V
220.0V ± 9.0V
VOLTAGE
(by IC883) MAIN 12V 12.0V ± 0.5V
(by IC3001) MAIN 9V
9.0V ± 0.5V
(by L008) MAIN 5V 5.0V ± 0.3V
(by Q002) STBY 3.3V
3.3V ± 0.2V
(by C3023) BTL 30V 32.0V ± 2.0V
Q551