Panasonic TX-P42U20B / TX-P42U20E / TX-PR42U20 Service Manual ▷ View online
33
11 Block Diagram
11.1. Main Block Diagram
(LED:8TIME)
COLD
(LED:6TIMES)
(LED:7TIMES)
HOT
(LED:4TIME)
P9
PS SOS4
DATA
DRIVER
VSUS
DATA
DRIVER
P7
P+5V
BUFFER
SOS8_SS
SUSTAIN CONTROL
SUSTAIN
SUSTAIN CONTROL
SS21
VIDEO DATA
MAIN SW1
P35
RECTIFIER
C11
VSCAN GEN.
SC
SOS8_SS
DATA
DRIVER
MAIN SW2
DATA
DRIVER
CONTROL
PULSE
POWER
FACTOR
CONTROL
SC2
P+3.3V
DATA
DRIVER
Vda
DATA
DRIVER
Vda
RELAY
RECTIFIER
SOS6_SC1
SOUND15V
SCAN DRIVE
SM
VSUS
VSUS
VIDEO DATA
VSUS
P+3.3V
SC41
DATA
DRIVER
DATA
DRIVER
SC46
DATA
DRIVER
SM42
SS2
C23
P11
DATA
DRIVER
P
SS
P+5V
POWER MICOM
(LOWER)
VIDEO DATA
VAD GEN.
VIDEO DATA
VSUS GEN.
Vda
SS24
SC-BOARD
ENERGY RECOVERY
SOS DETECT
SCAN
DRIVER
SC20
P+3.3V
SCAN OUT
SOS7_SC2
DATA DRIVER (RIGHT)
C10
POWER SUPPLY
C25
SM46
P+15V
SUSTAIN CONTROL
P+15V
P+15V
P34
C1
VE GEN.
SC42
DATA
DRIVER
DATA
DRIVER
VIDEO DATA
F15V
SUSTAIN DRIVE
AC CORD
P+15V
Vda
CONNECTOR
DATA
DRIVER
F15V
P6
P+15V
STB5V
DATA
DRIVER
C2
STANDBY
VOLTAGE
RECTIFIER
DATA
DRIVER
PROCESS
VOLTAGE
RECTIFIER
P+5V
P+5V
SS33
SUSTAIN
VOLTAGE
RECTIFIER
SOS8_SS
SS11
C21
P+5V
STB5V
SCAN CONTROL
VSET GEN.
P+3.3V,P+5V
P2
VSUS
SCAN
DRIVER
SM41
C20
P-BOARD
SOS DETECT
SS-BOARD
SOS DETECT
DATA DRIVER (LEFT)
ENERGY RECOVERY
Vda
SC-BOARD
FLOATING PART
SOS DETECT
(LED:8TIME)
COLD
(LED:6TIMES)
(LED:7TIMES)
HOT
(LED:4TIME)
S1B
ON
POWER SWITCH
MAIN SW2
POWER SW
MAIN SW1
S
(LED:9TIMES) DCC SOS
(LED:9TIMES)
(LED:12TIMES)
(LED:12TIMES)
(LED:6TIMES)
(LED:5TIMES)
(LED:3TIMES)
(LED:8TIMES)
(LED:7TIMES)
(LED:4TIMES)
AV IN I/F
L/R OUT
R
NAND
FLASH
AV1,2
AV3
EEPROM
A32
VIDEO
DATA
L/R
DCDC
AUDIO
CI ASIC
VDAC OUT
DVB_RF
PWM L/R
PWM L/R
RGB_CVBS
A20
A6
STB1.2V
P+15V
+5V(P)
P+3.3V
SOUND SOS
VIDEO DATA
SOUND SOS DET
CIRCUIT
A7
F15V
V OUT
V/R/G/B
STB5V
SOUND15V
STB5V_M
P+5V
P+1.2V
C.A.T.S SENSOR
P+1.2V
OPTICAL
V
SOS6_SC1
LVDS DATA
P+15V
SUB+3.3V DET
P+3.3V
K1
A31
SUSTAIN
CONTROL
REMOTE RECEIVER
SUB9V
P+5V
SUB9V
DCDC
DCDC
TUNER
RECEIVER
+15V(P)
AMP
HDMI1-2
SPEAKER(L)
CONT.
SOS6_SC1
A11
L/R
SUB1.8V
CI SLOT
STB3.3V
SD CARD DATA
L/R OUT
SUB5V
P+3.3V
SUB3.3V
P+3.3V DET
C.A.T.S SENSOR
DCDC
P+5V
HP L/R
POWER SOS
HEAD_
PHONE
L/R
K
SD CARD IF
IFD_OUT
SOS8_SS
OPTICAL AUDIO OUT
Parallel_
TS(FE)
PLASMA AI
CPG with SS
H/V Sync Control
Sub Filed Processor
Plasma AI
Parallel_
TS
P+3.3V
SCAN CONTROL
REMOTE RECEIVER
P+5V
Parallel_
TS(CI)
REMOTE IN
DCDC
TS I/F
HDMI I/F
P+5V DET
STB5V
SOS7_SC2
CPU BUS
EEPROM
SUB5.6V
STB3.3V
SUB1.2V
STB3.3V
PEAKS-sLD
F15V
V
L
MON_L/R
SD CARD
TV_L/R
OUT
AUDIO
SLOT
MON_L/R
TV_L/R
PD4H
Y/PR/PB
HP_L/R
C.A.T.S. SENSOR
HP_L/R
POWER LED
LED_R/G
CPU BUS
I/F
A1
PANEL MAIN ON
SUB3.3V
SUB+5V DET
DIGITAL SIGNAL PROCESSOR
ANALOG-ASIC
SUB+9V DET
SUB9V
SUB5V
SOS7_SC2
KEY SWITCH
P+5V
LED_R/G
SUB9V
SPEAKER(R)
SOS4_PS
KEYSCAN1
STB_D3.3V
AUDIO
STB_D3.3V
PANEL
MAIN ON
PANEL SOS
COMP
SUB1.2V
Y/PB/PR
SUB5V
PANEL SOS
SUB3.3V
SIF_OUT
DCDC
SOS8_SS
SIF I/F
SUB5.6V
TMDS DATA
MPU
OUT I/F
AM
ANALOG
A
OPTICAL OUT
OFDM
CI TS
SUB1.8V
DCDC
AV SW
DCDC
(LED:12TIMES)
(LED:12TIMES)
(LED:6TIMES)
(LED:5TIMES)
(LED:3TIMES)
(LED:8TIMES)
(LED:7TIMES)
(LED:4TIMES)
ON/OFF CONTROL
34
11.2. Block (1/4) Diagram
(LED:3TIMES)
(LED:5TIMES)
(LED:10TIMES)
(LED:12TIMES)
P
P
Q5603
D5602
Q5602
SOUND15V
SUB3.3V
SUB9V
STB5V
P+15V
SUB5V
SUB3.3V
SUB9V
STB5V
SOUND15V
P+3.3V
P+5V
SUB3.3V
F15V
SUB1.8V
SUB1.2V
P+15V
D5471
Q5471
D5472
STB3.3V
STB3.3V
P+15V
STB1.2V
FE1.2V
STB3.3V
SUB3.3V
SUB5V
F15V
X8001
X8000
D2014
SUB5.6V
SUB5.6V
AV3.3V
AV3.3V
SUB3.3V
PEAKS-sLD
F15V
LVDS DATA
3
7
F15V
2
SOUND15V
SD DATA:4bit
8
SD CARD I/F
SD CARD
JK8850
9
F15V
1
SOUND15V
V
P+15V
AV1
AV3
AV2
COMP
Y/PB/PR
F15V DET
ON/OFF
Y/PR/PB
L/R
IC3000
AV SW
ANT IN
TV_V
IIC_TU
TU2901A
TUNER
5V
VIDEO
AUDIO
AM
L/R
V
TV
A6
P6
SYS_IIC0
L(+)
OPTICAL
SPEAKER_R
IC2301
AUDIO
L_OUT
OPTICAL AUDIO OUT
SPEAKER_L
1
2
R(-)
L(-)
SPEAKER
15V
SPEAKER
R(+)
A11
AUDIO AMP
4
D3300
R_OUT
3
OUT
SOUND
SOS
DET
Q2301
PWM L/R
PWM L/R
SOS
JK4700
5VDET_1
HDMI_CEC
5VDET_0
HDMI_CEC
+5V
DDC_IIC0
RX0
RX1
DDC_IIC1
HDMI IN 1
TMDS DATA CLOCK
+5V
TMDS DATA CLOCK
DDC IIC
DDC IIC
HDMI_CEC_
IN_OUT
EEPROM
NAND
FLASH
CPU BUS I/F
IIC_IF
+5V
SUB5V
+3.3V
+1.2V
SUB1.2V
IC5600
+1.8V
SUB3.3V
IC5601
SUB1.8V
IC5401
9V
5V
9V
SUB1.2V
SUB1.8V
3.3V
SUB_SD_3.3V
AVDDH3.3V
AVDD3.3V
IC8921
AVDDH
IC5604
AVDD
IC5603
MAIN
Y/PR/PB
L/R
OSD I/F
IIC2
IIC0
IIC0
IIC1
IIC1
IIC2
IIC2
VCC
IC8001
SPDIF
LVDS_OUT
AV I/F
HDMI I/F RECEIVER
DIGITAL SIGNAL PROCESSOR
A
1
6
7
8
5
V/R/G/B
L/R
DTV_RST
DTV_XRST
TV SUB ON
KEYSCAN1
KEYSCAN1
REMOTE IN
PANEL SOS
XRST_SYS_PD4
POWER LED(R)
XRST_SYS_PD4
C.A.T.S
STB_RST
STB_RST
POWER LED(R)
REMOTE IN
PANEL MAIN ON
PANEL MAIN ON
SUB3.3V DET
SUB9V DET
SUB5V DET
TV SUB ON
PANEL SOS
P+5V DET
P+3.3V DET
GENX
IIC
GENX
IIC
EEPROM
IC1100
JK8940
CI SLOT
IC8401
CI ASIC
P7
STB5V_SW_ON
7
8
3
4
5
P_S0
PANEL_MAIN_ON
P_S1
SOS4_PS
STB5V
1
TV_SUB_ON
P_S0
P_S1
9
SOS4_PS
A7
TV_SUB_ON
STB5V_SW_ON
PANEL_MAIN_ON
IFD_OUT1
DIGITAL
DEMODULATOR
IC8300
IF_AGC
IIC_TU
IIC2
IC8302
OFDM
2.5V
IFD1
IF_AGC
IFD_OUT2
SIF_OUT
IFD2
IC8400
CI TS
CONT.
CONT.
SIF I/F
TS I/F
NRST
XRST
SUB3.3V
V/R/G/B
L/R
L/R
LO2_L/R
HP_L/R
LO1_L/R
MON_L/R
TV_L/R
AV1_VOUT
AV2_L/ROUT
AV2_VOUT
L/ROUT
AV1_L/ROUT
AUDIO
ANALOG
CPU BUS
Parallel_TS(FE)
Parallel_TS
Parallel_TS(CI_IN)
Parallel_TS(CI_OUT)
5V_CI
IC8402
C.A.T.S_SENSOR
IC8950
SOUND SOS
TV_SUB_ON
TNR5V
IC2953
SUB5V
SUB5V
ERROR DET
SUB9V
SUB5.6V
VOLTAGE
DROP
DROP
SUB9V
+5.6V
IC2870
SUB5.6V
SOS
SOS
SOS
MPU(GenX)
STB1.2V
STB3.3V
IC2950
1.2V
1.2V
TNR3.3V
3.3V
SUB5.6V
3
4
11
12
IC1000
TEMP SENSOR
IIC2
POWER_DET
SW_OFF_DET
POWER_DET
SW_OFF_DET
AV1_BLUE
AV1_VOUT
RIN
AV1_RIN
HP_R
AV1_LIN
PR
YPBPR
AV1_GREEN
PB
AV3_V
AV2_RED_C
AV2_VOUT
AV2_GREEN
LOUT
AV1_ROUT
AV2_QLINK
JK3302
Y
AV1_QLINK
AV2_LOUT
JK3100B
LIN
AV2_BLUE
AV1
AV1_LOUT
AV1_VIN
AV2_RIN
AUDIO
AV3
IN/OUT
AV1_RED
HP_L
AV2_LIN
AV2_ROUT
AV2_VIN
JK3107A
HEADPHONE
ROUT
AV2
QLINK1
QLINK2
V
V
RGB_CVBS
ANALOG
OUT I/F
CVBS
IN1
VDAC OUT
DVB_RF
12MHz
OSCX0
OSCXI
24.576MHz
AXO
AXI
AUDIO I/F
+5V
IC3001
G LED ON
G LED ON
CI POWER ON
CI POWER ON
CI POWER ON
P ON/OFF
P ON/OFF
TNR5V
TV_SUB_ON
TNR3.3V
IC2952
CI I/F
CI DATA
2
9
10
IIC1
(LED:3TIMES)
(LED:5TIMES)
(LED:10TIMES)
(LED:12TIMES)
ARC_OFF
JK4701
HDMI IN 2
Q4512
35
11.3. Block (2/4) Diagram
(LED:6TIMES)
(LED:7TIMES)
(LED:8TIMES)
(LED:4TIMES)
IC9400-02
IC9803
66
68
63
A32
10
63
3
A31
48
66
68
G
R
P+15V
P+3.3V
P+5V
AV3.3V
STB5V
STB3.3V
SUB9V
SUB9V
STB5V
P+15V
P+15V
AV3.3V
STB3.3V
D5000
D2520
Q5000
P+3.3V
STB1.2V
STB3.3V
STB1.2V
D5100
Q5101
Q5100
SUB5V
SUB5V
P+5V
P+3.3V
P+15V
P+3.3V
P+5V
X9300
P+1.2V
SOS7_SC2
P+3.3V
BUFFER
UHZ
SUSTAIN CONTROL
SOS6_SC1
PD4H
SOS6_SC1
P_S0
CONTROL DATA
P_S1
P+3.3V
CONTROL DATA
DISCHARGE CONTROL
1.2V
P+3.3V
VIDEO DATA
VIDEO DATA
SCAN CONTROL
30
VIDEO DATA
LVDS DATA
SOS8_SS
SOS8_SS
P_S0
IIC0
P_S1
18
SCAN CONTROL
P+15V
CONTROL DATA
SUSTAIN CONTROL
P+5V
PLASMA AI
CPG with SS
H/V Sync Control
Sub Filed Processor
C11
SOS7_SC2
29
+1.2V
VIDEO DATA
3.3V
IC9300
A
C21
DIGITAL SIGNAL PROCESSOR
P+5V
15
P+15V
1
16
STB+3.3V
IC9800
OSD VOUT
XRST_SYS_PD4
SOS7_SC2
SOS6_SC1
SOS8_SS
SC20
A20
C.A.T.S
REMOTE IN
K
REMOTE RECEIVER
POWER LED
C.A.T.S. SENSOR
POWER LED(R)
KEY SWITCH
KEYSCAN1
STB_RST
STB_RST
SOS_DCC
PANEL SOS
PANEL SOS
DRVRST_PD4
DRVRST_
PD4
SOS4_PS
UHZ
SOS4_PS
SOS_DCC
SOS6_SC1
SOS7_SC2
SOS8_SS
IC5000
ANALOG-ASIC
DRVRST_PD4
SOS_DCC
SOS_DCC
LVDS DATA
AV3.3V
4
RMIN
3
C.A.T.S
SN2510
6
4
G_LED_ON
C.A.T.S SENSOR
A1
STB3.3V
8
1
2
1
6
REMOTE
RM2510
R_LED_ON
3
K1
POWER LED
8
2
TV SUB ON
STB+1.2V
FLASH I/F
ADDR/DATA
FLASH
MEMORY
IC9304
STB5V_SW_ON
SW_OFF_DET
POWER_DET
STB_RST
STB5V_SW_ON
POWER_DET
FOR
FACTORY
USE
CN0102
G_LED_ON
KEY SWITCH
SW5152
SW5153
SW5154
SW5153
SW5154
F
TV
VOL.DN/CH.UP
AV
SW5150
SW5151
SW5151
VOL.UP/CH.UP
P ON/OFF
X0
X1
SC_UHZ
D_UHZ
XRST_SYS_PD4
DRVRST_PD4
SC_UHZ
D_UHZ
UHZ
+5V
IC9801
IIC1
IIC2
Genx_IIC
3.3V
10
9
1
6
7
3
4
11
12
5
2
8
(LED:6TIMES)
(LED:7TIMES)
(LED:9TIMES)
(LED:9TIMES)
(LED:8TIMES)
(LED:4TIMES)
36
11.4. Block (3/4) Diagram
PUSH
SW2500
3
S1B
1
POWER SWITCH
5V
STB_PS
S POWER SWITCH
HOT
COLD
COLD
HOT
(LED:4TIMES)
+
F100
F101
F200
SOUND+15V
1
SS11
7
MAIN SW_ON
10
T400
P7
8
9
P34
P+15V
1
1
4
3
P6
IC700
5
Q300-Q303
2
2
1
1
P35
C25
P11
F_15V_ON
7
LIVE
STB5V_ ON/OFF
T301
1
P+15V
10A 250V
ALL_OFF
PFC
P2
L100,L101
D200
P25
PFC_ON
2
TV SUB ON
NO USE
+5V
PANEL_MAIN_ON
RL101
4
AC FAIL
F+15V
IC601
D100
IC603
STBY5V
A6
630mA 250V
P+15V
MULTI
CONTROL
IC600
Vda
IC100
PHOTO COUPLER
NEUTRAL
S0
P9
5
RL102
7
3
3
F+15V
IC400
Vda
T300
POWER MICOM
1
A7
S1
P+15V
Vsus
Vsus
V_RESO_ON
Vsus
IC401
Vda_IN
Vsus_IN
PFC_ON
SC2
RESONANCE
PHOTO COUPLER
TV SUB ON
ALL_OFF
POWER SOS
PANEL_MAIN_ON
RUSH RELAY_ON
MAIN RELAY_ON
STB
CONTROL
CONTROL
P
POWER SUPPLY
RECTIFIER
RECTIFIER
AC CORD
FILTER
10A 250V
RL100
DRIVE
Q103
Q104
D108
D109
D109
PR101
5A 250V
R141
PFC
CONTROL
Q101
DET
Q400-Q402
T200
IC200
AC DET
CONTROL
STB
IC201
PHOTO COUPLER
IC202
PHOTO COUPLER
IC903
IC901
Vda
ERROR DET
+
-
DRIVE
+
-
IC902
Vda
CONTROL
D703
D702
CONTROL
PR900
4A 250V
Q901
DISCHARGE
T100
T900
Q701
DET
Q703
Q714
Q715
D904
D903
Vda
ERROR DET
IC904
DISCHARGE
R923
Vda
D708
Vsus
ERROR DET
IC701
Q706
Vsus Adj
Q709-Q712
Vsus
REFERENCE
Vsus
VR251
Q705
Q707
Q609
Q602
Q600
Q505
D600
PHOTO COUPLER
D800
F+15V
ERROR DET
IC800
RESET
D501
IC500
9
3
1
SOUND+15V
Q800
ON/OFF
Q801
15V
DET
4MHz
X600
11
STB5V_SW_ON
8
SOS_P4
9
MAIN_SW_1
12
MAIN_SW_2
14
STB5V
S0
S1
PANEL_MAIN_ON
SOS_P4
RST
STB5V_IN
XIN
XOUT
Q805
Q807
Q807
NEUTRAL
LIVE
D701
IC602
MAIN_SW_2
MAIN_SW_1
STB
ERROR DET
HOT
COLD
COLD
HOT
(LED:4TIMES)
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