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Service Seminar
Service Seminar
(Circuit Explanation of LCD for Latin America)
(Circuit Explanation of LCD for Latin America)
Model
Model
DATE
DATE
: TC-32/26LX600
: TC-32/26LX600
: Oct 23-24, 2006
: Oct 23-24, 2006
TC-32/26LX60
TC-32/26LX60
TC-23LX60
TC-23LX60
CS Promotion Center
Panasonic AVC Networks Company
![](/html/c1/c17c/c17c19b7600f796b28ad7689f20b1ae5667d3fa2e87d5d5a7aeeb7c941093f61/bg2.png)
Contents
<Review of E-Seminar>
1. LCD Line-up for Y2006
2. Chassis Structure
3. Explanation for Signal Circuit
4. Explanation for Power Supply Circuit
5. Troubleshooting
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Contents
<Hands on for LCD>
1. Typical Trouble Example
2. The Idea of Diagnosis for LCD
3. Introduction of Jig
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<Review of E-Seminar>
![](/html/c1/c17c/c17c19b7600f796b28ad7689f20b1ae5667d3fa2e87d5d5a7aeeb7c941093f61/bg5.png)
1. LCD Line-up for Y2006
![](/html/c1/c17c/c17c19b7600f796b28ad7689f20b1ae5667d3fa2e87d5d5a7aeeb7c941093f61/bg6.png)
1-1-1. LCD Line-up for Y2006 (USA)
2005
32LX50
26LX50
23LX50
19LX50
26LE55
23LE55
23LE50
STEP UP
LEADER
Derivative Model
2006
TC-32LX600
TC-26LX600
TC-32LX60
TC-26LX60
TC-23LX60
TC-32LE60
TC-26LE60
19LE50
20LA5
20LE50
20LE5
4:3
![](/html/c1/c17c/c17c19b7600f796b28ad7689f20b1ae5667d3fa2e87d5d5a7aeeb7c941093f61/bg7.png)
1-1-2. LCD Line-up for Y2006 (Canada)
2005
32LX50
26LX50
23LX50
19LX50
STEP UP
LEADER
2006
TC-32LX600
TC-26LX600
TC-32LX60C
TC-26LX60C
TC-23LX60
23LE50
20LA5
20LE50
20LE5
Derivative Model
/ 4:3 Model
TC-32LE60
TC-26LE60
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1-1-3. LCD Line-up for Y2006 (Latin America)
2005
32LX50
26LX50
19LX50
20LA5
2006
TC-32LX60L
LEADER
TC-26LX60L
4:3 Model
![](/html/c1/c17c/c17c19b7600f796b28ad7689f20b1ae5667d3fa2e87d5d5a7aeeb7c941093f61/bg9.png)
1-1-4. LCD Line-up for Y2006 (Mexico)
2005
32LX50
26LX50
19LX50
20LA5
2006
TC-32LX60C
LEADER
TC-26LX60C
4:3 Model
![](/html/c1/c17c/c17c19b7600f796b28ad7689f20b1ae5667d3fa2e87d5d5a7aeeb7c941093f61/bga.png)
1-2. Product Summary
Screen Size
ATSC
Panel
Video Processor
PC input
LX50
32/26/23/19
―
VA panel
GC4PRO(32/26)
GC3FM(23/19)
―
LX60C/L
32/26
No
IPS Panel
Micronas VCTP *
――POD (CATV)
――SD card
―
LX60
32/26/23
Yes (except 23”)
IPS Panel
Micronas VCTP *
―
―
―
LX600
32/26
Yes
IPS plus panel
Micronas VCTP *
w/ Vivid mode
―
―
―
HDMI
Cosmetic
Color
Others
1 (32/26)
LX50 design
Gray
1 (w/HDAVI **)
LX60 design
Black & silver
* Video-Controller-Text Progressive ** Not available in LX60L
1 (w/HDAVI)
LX60 design
Black & silver
2 (w/HDAVI)
LX60 design
All Black
Demo mode
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2. Chassis Structure
![](/html/c1/c17c/c17c19b7600f796b28ad7689f20b1ae5667d3fa2e87d5d5a7aeeb7c941093f61/bgc.png)
2-1. Location of PC board
SP
Inverter
SP
Current 32/26LX50
P
DG
DV
(HDMI)
AP
H
G
V
SP
K
New LX600/LX60
Control Unit
AP
SP
G
Inverter
SP
32”/26”only 23” only
32/26/LX600, 32/26LX60 only
A
(HDMI)
DT
P
SP
V
K
Differences from LX50:
1. DT board is introduced. (32/26LX600, 32/26LX60 only)
2. The function of DG, H, and DV board are combined to A board.
3. The location of G board, AP board and P board are changed.
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2-2. Function of PC board
FunctionBoard Name
Digital TunerDT
32/26LX600
32/26LX60
Yes
Yes
Yes
Yes
Yes
Yes
Yes
32/26LX60C
32/26LX60L
23LX60
YesYesMAIN (Signal Processor, HDMI)A
YesYesPower (Board Change Only)P
YesYesDC-DC ConverterAP
YesAV3 Terminal, HeadphoneG
YesHeadphoneK
YesYesLED, Remote ReceiverV
YesYesKEYSCAN, Power SWControl Unit
![](/html/c1/c17c/c17c19b7600f796b28ad7689f20b1ae5667d3fa2e87d5d5a7aeeb7c941093f61/bge.png)
3. Explanation for Signal Circuit
![](/html/c1/c17c/c17c19b7600f796b28ad7689f20b1ae5667d3fa2e87d5d5a7aeeb7c941093f61/bgf.png)
3-1. Differences from Current Models
Current 32/26LX50
DG
H
MPU
AUDIO
SWITCH
LVDS
GC4L
GC4
PRO
SOUND
CONTROL
Differences from LX50:
DV
VIDEO
SWITCH
HDMI
A
AUDIO
SWITCH
New LX600
New LX60
FPGA
VCTP
HDMI
(CEC)
* 32/26/LX600, 32/26LX60 only
DT*
ATSC
1. The function of H, DG, and DV board is merged into A board.
2. VCTP and FPGA are introduced instead of VIDEO SW, SOUND CONTROL,
MPU, GC4PRO, GC4L and LVDS as shown in yellow color.
3. DT board is introduced. (32/26LX600, 32/26LX60 only)
4. CEC circuit for HDAVI Control is added on A board. (except 32/26LX60L)
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3-2-1. Video Signal Flow (LX600/LX60 except 23LX60)
LX600 only
A
DT
TUNER
IC8211
ATSC
LSI
HDMI1
HDMI2
IC8240
PEAKS
LITE
IC5004
HDMI
I/F
Included OSD
Y/C
(for Monitor Out)
Digital
IC4801
DT_VOUTENB
IC4001
OSD
VCTP
OSD
Analog
Digital
AV1
AV2
COMPONENT
Monitor Out
G AV3
Analog
(*) LVDS : Low Voltage Differential Signaling
VIDEO
SWITCH
VIDEO
PROCESSOR
LVDS
LVDS
IC????
IC4004
FPGA
LCD
Panel
LVDS
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3-2-2. Video Signal Flow (32/26LX60C/L)
A
TUNER
AV1
AV2
COMPONENT
HDMI
Analog
IC5004
HDMI
I/F
Analog
Digital
Digital
IC4001
OSD
VCTP
OSD
VIDEO
PROCESSOR
VIDEO
SWITCH
Monitor Out
G AV3
IC????
IC4004
LVDS
FPGA
LCD
Panel
LVDS
(*) LVDS : Low Voltage Differential Signaling
LVDS
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3-2-3. Video Signal Flow (23LX60)
A
TUNER
AV1
AV2
COMPONENT
HDMI
Analog
IC5004
HDMI
I/F
Analog
Digital
Digital
IC4001
OSD
VCTP
OSD
VIDEO
PROCESSOR
VIDEO
SWITCH
Monitor Out
G AV3
IC????
IC4004
LVDS
FPGA
LCD
Panel
LVDS
(*) LVDS : Low Voltage Differential Signaling
LVDS
![](/html/c1/c17c/c17c19b7600f796b28ad7689f20b1ae5667d3fa2e87d5d5a7aeeb7c941093f61/bg13.png)
3-3-1. Audio Signal Flow (LX600/60 except 23LX60)
LX600 only
IC4001
A
DT
TUNER
Digital
Audio OUT
IC8211
ATSC
LSI
HDMI1
HDMI2
IC8240
PEAKS
LITE
IC8200
Audio
DAC
IC5004
HDMI I/F
IC8232
Audio
SW
IC8244
Audio
ADC
L/R
VCTP
MSP
SW
IC2006
L/R
L/R
IC2001
Audio
AMP
IC2005
HP
AMP
L/R
Analog
Digital
L
R
AV1
AV2
DVI (Analog)
Audio In
Monitor Out
G AV3
Headphone
L/R
L/R
L/R
L/R
L/R
L/R
L/R
AUDIO
SWITCH
![](/html/c1/c17c/c17c19b7600f796b28ad7689f20b1ae5667d3fa2e87d5d5a7aeeb7c941093f61/bg14.png)
3-3-2. Audio Signal Flow (32/26LX60C/L)
A
TUNER
AV1
AV2
DVI (Analog)
HDMI
IC2202
IC5004
HDMI I/F
L/R
L/R
L/R
L/R
IC4001
VCTP
MSP
SW
IC2006
AUDIO
SWITCH
L/R
L/R
L/R
L/R
IC2001
Audio
AMP
IC2005
HP
AMP
Analog
Digital
L
R
L/R
Audio In
Monitor Out
G AV3
Headphone
L/R
L/R
L/R
![](/html/c1/c17c/c17c19b7600f796b28ad7689f20b1ae5667d3fa2e87d5d5a7aeeb7c941093f61/bg15.png)
3-3-3. Audio Signal Flow (23LX60)
A
TUNER
AV1
AV2
DVI (Analog)
HDMI
IC2202
IC5004
HDMI I/F
L/R
L/R
L/R
L/R
IC4001
VCTP
MSP
SW
IC2006
AUDIO
SWITCH
L/R
L/R
L/R
L/R
IC2001
Audio
AMP
IC2005
HP
AMP
Analog
Digital
L
R
L/R
Audio In
Monitor Out
K AV3
Headphone
L/R
L/R
L/R
![](/html/c1/c17c/c17c19b7600f796b28ad7689f20b1ae5667d3fa2e87d5d5a7aeeb7c941093f61/bg16.png)
4. Explanation for Power Supply Circuit
![](/html/c1/c17c/c17c19b7600f796b28ad7689f20b1ae5667d3fa2e87d5d5a7aeeb7c941093f61/bg17.png)
4-1. Differences in Power Supply
The Function of P and AP board
P board function
1. AC input
2. Standby circuit
3. Circuit for Inverter and for AP board’s regulator
AP board function
1. Regulator circuit (DC-DC conversion)
Differences of Power Supply in LX600 and all LX60 models
Voltages
P board output
AP board output for Tuner
32/26LX600
32/26LX60
24V
10V
STB7V
30V
MAIN 9V
MAIN5V
18.5V
32/26LX60C
24V
10V
STB7V
30V
MAIN5V
18.5V
24V
STB7V
30V
MAIN5V
23LX6032/26LX60L
120V100V~240V120V120VAC voltage
24V
33V
STB7V
30V
MAIN5V
16.5V18.5VAP board output for Audio AMP
![](/html/c1/c17c/c17c19b7600f796b28ad7689f20b1ae5667d3fa2e87d5d5a7aeeb7c941093f61/bg18.png)
4-2-1. Power Supply Outline (LX600/LX60 except 23LX60)
A12
51-53
54,57
A1
4
7
STB 3.3V
MAIN 3.3V
MAIN 2.5V
MAIN 1.5V
MAIN 1.8V
MAIN 3.3V
MAIN 5V
CN1
3
1
P
SUB_ON
Line
Filter
MAIN
Trans
Relay
24V
10V
RELAY
STB
Trans
STB_7V
Relay
24V
CN3
1-3
4,5
13 13
11
12
CN2
AP2
1-3
4,5
11
12
Q7223
Q7224
AP1
1-9
AP
AP5
24V
IC7209
9V
IC7218
18V
IC7210
9V
IC7205
5V
IC7212
12V
24V
1-4
1-4
INVERTER
24V
SUB_9V
SOUND_18V
Q7301
MAIN_9V
Q7450
MAIN_5V
Q7303
PANEL_12V
Q7701
Q7702
AP7
Q7212
MIX
Power SW
LCD Panel
12V
AP3
7
2,3
17-19
21,22
AP4 A4
3
22
8
6
R
7
15
111211
PANEL 12V
INV ON
A3
7
2,3
17-19
21,22
3
22
8
6
7
15
12
A2
28-31
A5
3
BT_30V
SOUND 18V
STB7V
SUB9V
MAIN 5V
IC1806
IC1807
IC1803
IC4002
Q1801
Q1802
MAIN 9V
MAIN 8V
MAIN 5V
STB 3.3V
STB 1.8V
MAIN 3.3V
IC1805
IC1804
IC5005
DT12
BT_30V
88
51-53
54,57
2
8
1
101
102 MAIN_ON
161
11
7
MAIN_9V
MAIN_5V
LED(R)
V1
4
STB_3.3V
7
LED(R)
LED(R)
IC4001
(VCTP)
VCTP_RESET
SUB9VSENSE
SUB_ON
KEY_SCAN
POWER
105
IC1102
(EEPROM)
IC4004
(FPGA)
FPGA_OK
97
PANEL _ON
INV_ON
IC4003
(PROM)
IC4005
(PLL)
DT
V