Service Manuals, User Guides, Schematic Diagrams or docs for : panasonic Plasma TV TH-42PD45U tx-42pd25u
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15 Block and Schematic Diagrams
15.1. Schematic Diagram Notes
71
71
15.2. PF-Board Block Diagram
PF
Line Filter/F.STB Board
DC187V
D925
C922
!
+
+
D920 C920 C928
+
IC920
POWER CONTROL 4 5
-
400V
Vcc D
Startup
- Latch-stop UVLO
UVLO
comp
+ comp + + comp
- -
VUL
Vcc(start) Vcc(startup off)
OVP /Vcc(stop) /Vcc(startup on)
+ comp Startup
R
-
Q
VOVP S
Peak Burst Peak
Thermal C921 R924
Current Current
Shutdown
Limit Limit #
R928 R927 Z/C
1 Zero Current
Detection
On Dead Timer
C926 S
Stand-By Soft
Q drive
Vref R
S
IF/B
2 F/B
- Restart L921
+ Timer
R935 R934
On Time Timer
GND
3
C924 R929
C925 D922
D926 R925
R940
! IC9
FEED
4 1
L.F
3 2
LF911
!
!
F902
R904 K5D312BK0012
! !
T3.15AL 250V
AC CORD AC INLET
AC100V K2AH3H000028 !
! ! !
K2CG3DH00034 T8AH 250V
F901 LF904A LF909A LF915A
AC120V NEUTR
4
NEUTRAL
! ! ! ! !
! 3 4 3 4 3 4
GND R901 CF901 C902 C915 C903
C901
1 L.F L.F L.F
$
LIVE
2 1 2 1 2 1
PF1
F900 T8AH 250V
!
HOT
! ! ! !
S901 HOT C911 C
C916 C917
COLD
! CF902
TH-37/42PD25U/P
PF-Board Block Diagram
72
HOT COLD
C972
! T920
24V(UN Reg)
18 P2
D971
17 NC S3 2 + C973
16 PT S4 3
15 C970
NC
400V 14 P1 S1A 5 10.5V(UN Reg)
TO PA10
D970 PF10
13 NC S1B 6
C971
+
1 NR 10.5V
12 NC S2A 7
2 NR 10.5V
11 V2 8
5 NR 24V
S2B
C921 R924
10 V1 7 STAND BY 5V
#
9 PF AC ON/OFF
! C914 R970
L921
R972 C975
R976
C974
2 R974
R973
HOT COLD 3
R940
1
REF_2.5V
2 R975
! IC921 4 1
R971
FEED BACK
3 2
IC970
ERROR
VOLTAGE
DET
! STAND-BY 5V
RL901
+
C990
D990
Q990
POWER ON/OFF CTL.
R990
R992
HOT COLD
BK0012
L 250V
NEUTRAL
TO P9
PF2
4
!
C903 1 NEUTRAL
1 3
4 LIVE
LIVE
! !
C911 C910
TH-37/42PD25U/P
PF-Board Block Diagram
72
15.3. PF-Board Schematic Diagram
PF-BOARD
A TXNPF1URSU
DC187V
D920
TP904
B0EBNT000002
+
R922
*
+
C920
**
200V 220k
560u DC4
*
*
**
TP903
-
TP901
*
D925 D921
B0HCMM000001
B0EAKT0000
L920
IC920 C928
+
C922 J0JKB0000038 400V
25V 50V
* *
220u 0.1u
C0DACZH00002
POWER CONTROL
4 5 400V
B -
+
Latch-stop
comp +
UVLO
comp
+
Startup
UVLO
comp
Vcc D
- -
C990 VUL
+
Vcc(start) Vcc(startup off)
50V RL901 OVP /Vcc(stop) /Vcc(startup on)
10u K6B1ADA00023 + comp Startup
R
-
Q
*
VOVP S
Peak Burst Peak R924
D990 Thermal C921 22
*
Current Current
MA3X152K0L R928 R927 Shutdown 1500p
Limit Limit
Z/C 2kV
*
3.9k 100
1 Zero Current
Detection
Q990
*
R990 2SD13280TL On Dead Timer
C926 S
3.3k
50V Stand-By Soft
100p Q drive
EXCELSA24T
Vref R
R992
47k 4 1 S
IF/B
L921
4 1
* * 2 F/B
- Restart
L.F
LF911 + Timer
R929 100
G0B353G00001
3 2 50V 1000p On Time Timer
R935
GND
R934
C924
13k
* *
10
3
3 2
D926 C925
MA3X152K0L 50V
2200p
R925 R926
C 10k 9.31k D922
MAZ31000ML
R940
6.8k
R993
0
R994
0
JS21
JS22
JS20
JS19
JS70
JS73
ZA901
K4ZZ01000121
**
T3.15AL-250V
R904
F902
1.8
K5D312BL0008
**
HOT
LIVE
D
COLD HOT
JS9
TO
P-BOARD
PF2
(P9) JS10
**
*
*
*
1
N
4
3
4
3
<
<
**
C903
*
*
*
C915 LF909A C902
LF915A L
1u 0.22u 0.22u
3 G0B702K00002 G0B702K00002 G0B7
*
*
*
L.F L.F
1
2
1
2
4
LIVE
*
*
*
*
J
**
J
S910 1.8mm S907 1.8mm S905 1.8mm
C910 C911
220p 220p C917 C916
1000p 1000p S906 1.8mm
S908 1.8mm
E
S911 1.8mm
TH-37/42PD25U/P
PF-Board Schematic Diagram
1 2 3 4
73
DC187V
C923
C972
R922 400V
0.01u T920 1kV
*
220k TP977
ETS29AK7J5AD 330p
DC400V
GT GT
*
*R923
L973
10 L972 D971
18 P2 10u
0 B0HAPM000012
*
+
D921 C973
001
B0EAKT000018 17 NC S3 2 35V
L920
680u TO
J0JKB0000038 400V
16 PT S4 3 PA-BOARD
* *
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