Panasonic TH-37PD25U-P Service Manual page 118

15.3. PF-Board Schematic Diagram
A
B
R990
3.3k
R992
C
D
TO
P-BOARD
PF2
(P9)
1
N
3
4
LIVE
E
TH-37/42PD25U/P
PF-Board Schematic Diagram
1
PF-BOARD
TXNPF1URSU
C990
50V RL901
10u
K6B1ADA00023
D990
MA3X152K0L
Q990
2SD13280TL
4
47k
*
LF911
G0B353G00001
*
3
R993
0
R994
0
JS70
JS73
ZA901
K4ZZ01000121
R904
1.8
COLD HOT
C903
LF915A
1u
G0B702K00002
C910
C911
220p 220p
2
D920
B0EBNT000002
C920
200V
560u
TP903
POWER CONTROL
R928 R927
3.9k 100
C926
50V
100p
1
4 1
*
3 2
*
2
D926
MA3X152K0L
F902
K5D312BL0008
C915
0.22u
S910 1.8mm
C917 C916
1000p 1000p
S911 1.8mm
TP904
TP901
IC920
C928
C922
25V 50V
220u 0.1u
C0DACZH00002
Vcc
Startup
Latch-stop
UVLO
-
UVLO
comp
+ comp + + comp
- -
VUL
Vcc(start) Vcc(startup off)
OVP /Vcc(startup on)
/Vcc(stop)
comp Startup
+
R
-
Q
VOVP
S
Peak Burst Peak
Thermal
Current Current
Shutdown
Limit Limit
Z/C
1 Zero Current
Detection
On Dead Timer
S
Stand-By Soft
Q drive
Vref
R
S
IF/B
F/B
2
- Restart
+ Timer
On Time Timer
C925
50V
2200p
R925 R926
10k 9.31k
LF909A
G0B702K00002
S907 1.8mm
S908 1.8mm
3
DC187V
R922
220k
DC4
D925
D921
B0HCMM000001
B0EAKT0000
L920
J0JKB0000038
400V
* *
4 5 400V
D
R924
C921 22
1500p
2kV
GND
3
D922
MAZ31000ML
R940
6.8k
HOT
LIVE
JS9
JS10
C902
L
0.22u
G0B7
J
J
S905 1.8mm
S906 1.8mm
4
73