Panasonic TX-LR32C20 Service Manual ▷ View online
TX-LR32C20
33
8 Measurements and Adjustments
8.1.
Voltage chart of A-board
Check voltage as follows at Reception state
8.2.
Voltage chart of P-board
8.3.
Picture level adjustment (RF)
VOLTAGE
TEST POINT
SPECIFICATION
(Reception state)
(Reception state)
STB3.3V
TP4716
3.3 ± 0.16 V
SUB5V
TP4724
5 ± 0.25 V
SOUND15V
TP2765
18 ± 2 V
5VS
TP2768
6.1 ± 0.3 V
SUB6V
TP2767
6.1 ± 0.3 V
TCON13.7V
TP7019
12.5 ± 2 V
only miniLVDS model
TCON2.5V
TP4826
2.5 ± 0.12 V
TCON31V
TP7013
31 ± 3.1 V
TCON-6V
TP7014
-5.7 ± 0.6 V
VOLTAGE
TEST POINT
SPECIFICATION
(Reception state)
(Reception state)
TEST POINT
P32V
TP7503
31 ± 2.5 V
J107
17V
TP7502
18 ± 2 V
J115
DTV12V
TP7501
12.2 ± 0.6 V
J21
TUNER6V
TP7601
6.1 ± 0.3 V
D7603K
DC390V
TP7201
390 ± 10 V
Instrument Name
Remarks
1. REMOTE TRANSMITTER
2. Ex. Signal (Sprit color bar)
2. Ex. Signal (Sprit color bar)
Adjustment or Inspection Procedure
Remarks
procedure
1. Receive the Sprit color bar.
(Screen mode: ZOOM or FULL Picture mode: DYNAMIC AI: OFF AI Picture: OFF)
*BACK LIGHT +30
*BACK LIGHT +30
Inspection
1. Enter Service mode, and select MAIN_ADJ PICTURE.
Volume UP/DOWN key makes GAIN displayed under PICTURE to set.
Pushing the remote controller [OK] key for about 3 seconds, GAIN is suited
to the adjustment value automatically.
Pushing the remote controller [OK] key for about 3 seconds, GAIN is suited
to the adjustment value automatically.
(The Sprit Color Bar Pattern)
TX-LR32C20
34
8.4.
Picture level adjustment (VIDEO)
8.5.
Picture level adjustment (YUV)
Instrument Name
Remarks
1. REMOTE TRANSMITTER
2. Video signal generator (100% Color bar)
2. Video signal generator (100% Color bar)
Adjustment or Inspection Procedure
Remarks
procedure
1. Receive 100% Color bar.
(ASPECT: ZOOM or FULL, Picture mode: VIVID, AI Picture: OFF)
* BACK LIGHT MAX VALUE
* BACK LIGHT MAX VALUE
Inspection
1. Enter Service mode, and select ADJUST CONTRAST.
Volume UP/DOWN key makes GAIN value displayed on the right of CONTRAST to set.
Pushing the remote controller [OK] key for about 3 seconds, GAIN is suited to the adjustment value
automatically.
Pushing the remote controller [OK] key for about 3 seconds, GAIN is suited to the adjustment value
automatically.
Instrument Name
Remarks
1. REMOTE TRANSMITTER
2. Component Video signal generator (100% Color bar 1080i)
2. Component Video signal generator (100% Color bar 1080i)
Adjustment or Inspection Procedure
Remarks
procedure
1. Receive 100% Color bar.
(ASPECT: ZOOM or FULL, Picture mode: VIVID, AI Picture: OFF)
* BACK LIGHT MAX VALUE
* BACK LIGHT MAX VALUE
Inspection
1. Enter Service mode, and select ADJUST CONTRAST.
Volume UP/DOWN key makes GAIN value displayed on the right of CONTRAST to set.
Pushing the remote controller [OK] key for about 3 seconds, GAIN is suited to the adjustment value
automatically.
Pushing the remote controller [OK] key for about 3 seconds, GAIN is suited to the adjustment value
automatically.
TX-LR32C20
35
9 Block Diagram
9.1.
Main Block Diagram
(L
E
D
:7
T
IM
E
S
)
(L
ED
:1
TIM
ES
)
(L
E
D
:4
T
IM
E
S
)
(L
ED
:3
TIM
ES
)
(L
E
D
:9
T
IM
E
S
)
(L
ED
:3
TIM
ES
)
STB5V
TMDS DATA
DCDC
V10
STB_RESET
TUNER5V
INV_SOS
OVP_DET
ERROR DET
TUNER5V
(SIDE)
POWER LED(R)
DTV12V
POWER CONTROL
LCD PANEL
TUNER6V
STB3.3V
INV_SOS
STB5.8V
DCDC
D/A
RECTIFIER
+5.8VS
SUB5V
PANEL POWER SOS
VOFF2-6V
SUB9V
(SIDE)
DCDC
V
SUB9V
SOUND SOS
STB_RESET
DVDD2.5V
AMP
DCDC
SOUND SOS
STB3.3V
VCON31V
INV_ON
(STM)
(SIDE)
DTV_L/R
DROP
D/A CONVERTOR
SUB1.2V
STB5V
CONTROL PANEL
DVB_CVBS
R
L/R
HDMI I/F
PFC CONTROL
V-BOARD
ANALOG-ASIC
Y/PB/PR, R/G/B/H/V CVBS
VOLTAGE
HDMI3
V/Y/PB/PR
STANDBY VOLTAGE RECTIFIER
C.A.T.S. SENSOR
V
DTV12V SENSE
INV_ON
SUB3.3V
PANEL POWER SOS
OPTICAL AUDIO OUT
DCDC
DVDD2.5V
OVP_DET
DCDC
DTV12V
INVERTER POWER CONTROL
CURCUIT
PWM
SUB1.8V
VIDEO PROCESSOR
STB+3.3V
SUB5V
R/G/B/H/V
PWM
VREF_1-12
REMOTE RECEIVER
OVER
AC CORD
STB+3.3V
12V
SUB 3.3V SENSE
AUDIO
PANEL
EEPROM
AUDIO PROCESSOR
SUB_ON
TS Parallel
SD CARD DATA
OPERATION BUTTON
VOLTAGE
K-BOARD
HDMI2
A02
EEPROM
K01
NAND FLASH
DVDD2.5V
ON
HDMI1
LIVE
+5.8VS
INV_PWM
TMDS DATA
POWER LED
INV_PWM
INV_SOS
SUB1.8V
SPEAKER(R)
(A Chip)
AV2
CPU BUS I/F
(D Chip)
CONTROL
DCDC
NEUTRAL
17V
SOS DET
A-BOARD
PANEL
OPTICAL OUT
SUB_ON
SOS DET
AV SW
AVDD13.7V
PC
MONITOR L,R
POWER LED
P-BOARD
POWER SUPPLY
MONITOR OUT
MONITOR V
DIGITAL SIGNAL PROCESSOR
OPTICAL
V
REMOTE RECEIVER
A/D CONVERTOR
AVDD13.7V
P5,P6.P7,P8
C.A.T.S. SENSOR
AVDD13.7V
RECTIFIER
LINE FILTER
SOUND17V
AUDIO
A14
SPEAKER(L)
HP
AV3
HEADPHONE
CPU BUS
INV_PWM
SD CARD
OUT
AV1
SUB ON/OFF
L
+5.8VS
RECEIVER
L/R
HOT START
(DAC_ENB)
SD CARD DATA
TMDS DATA
PROCESS VOLTAGE RECTIFIER
REMOTE IN
L/R
RELAY
32V
DTV12V
Peaks sLD
SOUND17V
TS Parallel
SIF
SUB5V
STB+5.8V
SLOT
SUB3.3V
LVDS DATA
POWER SW
P2
L/R
P1
BACK LIGHT
DCDC
SUB1.2V
A10
LVDS DATA
INV_ON
STB5V
KEYSCAN
A09
A12
C.A.T.S. SENSOR
IFD_OUT
OFDM
SIF_OUT
TUNER
V
(LED:7TIMES)
(LED:1TIMES)
(LED:4TIMES)
(LED:3TIMES)
(LED:9TIMES)
(LED:3TIMES)
TX-LR32C20
36
10 Wiring Connection Diagram
1. Wiring No. 1 ~ No. 5
2. Remove dust of terminal of LVDS and PB connector. (by ion blow) Pos. A14.
3. Insert LVDS into Pos.A14.
2. Remove dust of terminal of LVDS and PB connector. (by ion blow) Pos. A14.
3. Insert LVDS into Pos.A14.
Wire
Clamper
1
2
3
4
5
6
7
8
9
10
No.1 A03 - P2
No.2 A10 - K02
No.3 A04 - V10
No.4 A11 - SP (L)
No.5 A11 - SP (R)
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