Block Diagram; Power Supply - Panasonic PT-LB75EA Service Manual

11 Block Diagram

11.1. Power Supply

Power Supply
F9101
K4
LINE
D9101
FILTER
THERMOFUSE
K5
K2-P.C.Board
K3
K1 K2
K1-P.C.Board
AC IN
Power Cord
COLD HOT
Q3
L det
1
Lamp ON/OFF
2
A-P.C.Board
3
A4
ST1 PHOTO-
4
ISOLATORS
Power Control
6
Vla ckeck
7
Information Select
5
4 2
Q-Module
P1
POWER
LINE
RECTIFIER
FACTOR
FILTER
CORRECTION
P2
DC380 V
1
3 Q107
15 V
4
15 V AVR
B1
1
Q9603 Q9614
D D
3
S S
4 G G
L9604
D9601
C9610
STEP-DOWN CHOPPER
B4
B/Q-Module
Q2
Q1
(CONTROLLER)
PT-LB80NTU / PT-LB80NTE / PT-LB80NTEA / PT-LB80U / PT-LB80E / PT-LB80EA / PT-LB75NTU / PT-LB75NTE / PT-LB75NTEA / PT-LB75U / PT-LB75E / PT-LB75EA
HOT COLD
SWITCHING
TRANSFORMER
SWITCHING
REGULATOR
IC202
PHOTOISOLATOR
SW
PHOTOISOLATOR
D
D9604
Q9606 Q9610
S
G
Q9604
D9605
L9605 C9618
C9617
D
D9606
S Q9607 Q9611
G
15 V
Q9605
D9607
IC9603
HALF BRIDGE
DRIVER
B3 (MASTER)
43
P3
+17 V 4
INTERLOCK
SWITCH
9
STB 3.4 V
1
FAN 14 V
+6 V 5
3.4 V 7
Q204 11
PWON
1 4 2 1
A9 A7
Q202 SW Q203
P-Module
D DIRECT POWER OFF
A-
D9608
S
P.C.Board
G
Q9608
D9609
1
LAMP
B6
D B5
D9611
1
S
G
Q9609
D9612
+
IC9602
Z-P.C.Board
HALF BRIDGE
DRIVER
(SLAVE)
B-Module
2 4
A6
MAIN/STBY
18 V
STB 3.3 V
STB 14 V
6 V
3.3 V
FAN 4-13.5 V
( for )
Exhaust
Fan
A5
3
3
Z1