Pf-Board Schematic Diagram - Panasonic TH-42PX20U-P Service Manual
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Also See for TH-42PX20U-P:
- Operating instructions manual (72 pages) ,
- Service manual (406 pages)
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TH-42PX20U-P
14.4. PF-Board Schematic Diagram
PF-BOARD TXNPF1QKSU
!
A
!
C990
B
RL901
50V
10u
K6B1ADA00023
Q990
2SD13280TL
R990
3.3k
R992
47k
COLD
C
R994
0
JS70
JS73
R993
0
TO
P-BOARD
(P9)
D
N
PF2
!
ZA901
C910
1
K4ZZ01000121
220p
!
=
C903
250V
3
1u
4
LIVE
C911
220p
!
E
TH-42PX20U-P
PF-BOARD Schematic Diagram
1
!
D920
C920
B0EBNT000002
200V
560u
IC920
C0DACZH00002
POWER CONTROL
-
Latch-stop
+
comp
VUL
OVP
comp
+
-
VOVP
Thermal
3.9k
100
Shutdown
R928
R927
Z/C
1
Zero Current
Detection
On Dead Timer
100p
C926
Stand-By
50V
Vref
IF/B
F/B
2
-
<
+
!
4
1
*
*
On Time Timer
LF911
G0B353G00001
3
2
50V
*
*
C925
D926
50V
MA3X152K0L
2200p
TP903
T3.15AL-250V
R904
1.8
!
F902
K5D312BK0012
!
!
!
C915
LF915
LF909
250V
0.22u
G0B123K00001
G0B123K00001
!
!
C917
C916
1000p
1000p
2
3
DC187V
TP904
C923
R922
0.01u
!
T920
220k
400V
ETS29AK7E6AD
DC400V
2W
R923
10
18 P2
TP901
*
D925
L920
D921
B0HCMM000001
G0ZZ00001937
17 NC
S3
2
B0EAKT000018
C928
C922
400V
25V
50V
16 PT
S4
3
*
*
220u
0.1u
15
NC
*
400Vp
4
5
400V
-140Vp
14 P1
S1A
5
*
Vcc
D
Startup
UVLO
13 NC
S1B
6
comp
UVLO
comp
+
+
-
-
Vcc(start)
Vcc(startup off)
12 NC
S2A
7
/Vcc(stop)
/Vcc(startup on)
Startup
R
Q
11 V2
S2B
8
R924
S
L922
Peak
Burst Peak
22
C921
EXCELDR35V
Current
Current
10 V1
1500p
Limit
Limit
#
2kV
1/2W
!
C914
S
470p
Soft
Q
drive
R
S
Restart
Timer
GND
3
HOT
1%
1%
R925
R926
COLD
D922
10k
9.31k
MAZ31000ML
LIVE CIRCUIT
R940
6.8k
!
IC921
4
1
B3PAA0000261
3
2
JS9
JS10
!
!
LF904
C902
250V
G0B123K00001
0.22u
JS11
JS12
HOT
COLD
4
5
66
TP977
C972
1kV
=
330p
GT
GT
10u
L972
D971
L973
0
B0HAPM000012
C973
25V
1000u
TP978
1kV
C970
330p
L970
L971
EXCELSA24T
10u
=
*
*
-140Vp
D970
FMLG12SLF118
C971
25V
3300u
TP979
R970
560
C975
R972
50V
100
0.047u
C974
R976
2200p
2.2k
R974
16.9k
1%
R973
1k
R975
REF_2.5V
1%
2.32k
IC970
AN1431M-E1
ERROR DET
R971
470
T8AH 250V
!
F901
K5Y802B00001
!
!
!
C901
R901
250V
CF901
=
1M
1u
ERZV10V621P2
F900
!
K5Y802B00001
T8AH 250V
S901
!
J0LT00000009
CF902
!
ERZVG7Z361
TH-42PX20U-P
PF-BOARD Schematic Diagram
6
7
TO
PA-BOARD
(PA10)
PF10
1
NR_20.5V
2
NR_20.5V
3
GND
4
GND
5
NR_14V
6
GND
7
STAND-BY 5V
8
GND
9
PF_AC_ON/OFF
10
GND
N
4
AC
NC
3
GND
1
AC
LIVE
PF1
AC CODE
8
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