Panasonic PT56SX30B - 56" PROJECTION TV Manuel d'entretien - Page 4
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BOARD
A-Board
B-Board
C-Board
D-Board
F-Board
G-Board
K-Board
LB-Board
LG-Board
LR-Board
N-Board
R-Board
T-Board
X-Board
Y-Board
Preparation:
Set the following controls
Picture.......................... Normal.
Bright ...........................Normal.
Volume ......................... Min. (0).
Procedure:
1. Apply a monoscope pattern.
2. Connect the (-) Lead of the Digital Voltmeter to
TPBGND (Cold Ground) on B-Board.
3. Connect the (+) Lead of the Digital Voltmeter to
Test Point (On B-Board) and confirm the B+
Voltages (See Table 3).
BOARD DESCRIPTION
DESCRIPTION
Main chassis
Power supply
Convergence
Protection circuit
Comb filter
A/V connections
Costumer controls
Blue CRT drive
Green CRT drive
Red CRT drive
2nd tuner
Remote sensor
Line filter
A/V inputs
PIP processing
B+ Voltages Table
- 11 -
MPU, Audio Amp, Convergence,
Amp and Volt Regulation
Horizontal Deflection and High
voltage protector
Digital Convergence
EHT protector, over deflection
blanking, Vertical stop blanking
Digital 3-line comb filter
Front A/V connections
Keyboard
2nd tuner processing
Remote control board
VAO,FAO
No.
Test Point
1
TPB140
2
TPB15
3
TPB7
4
TP23
5
TPB23N
6
TPB32
Table 3: B+ Voltages Table
Voltage
138.5
±
1.0
15.0
1.0
±
7.0
0.5
±
23.0
1.0
±
-23.5
±
1.0
16.5
1.0
±
Service Manual