Service Manuals, User Guides, Schematic Diagrams or docs for : panasonic LCD National Training TC-32LX600 TC-26LX600 TC-32LX60 TC-26LX60 TC-23LX60 Service Seminar
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Service Seminar
(Circuit Explanation of LCD for Latin America)
Model : TC-32/26LX600
TC-32/26LX60
TC-23LX60
DATE : Oct 23-24, 2006
CS Promotion Center
Panasonic AVC Networks Company
Contents
1. LCD Line-up for Y2006
2. Chassis Structure
3. Explanation for Signal Circuit
4. Explanation for Power Supply Circuit
5. Troubleshooting
Contents
1. Typical Trouble Example
2. The Idea of Diagnosis for LCD
3. Introduction of Jig
1. LCD Line-up for Y2006
1-1-1. LCD Line-up for Y2006 (USA)
2005 2006
TC-32LX600
STEP UP TC-26LX600
32LX50
TC-32LX60
26LX50
LEADER TC-26LX60
23LX50
TC-23LX60
19LX50
26LE55
23LE55 TC-32LE60
23LE50
Derivative Model
TC-26LE60
19LE50
20LA5
20LE50 4:3
20LE5
1-1-2. LCD Line-up for Y2006 (Canada)
2005 2006
TC-32LX600
STEP UP
TC-26LX600
32LX50
TC-32LX60C
26LX50 TC-26LX60C
LEADER
23LX50 TC-23LX60
19LX50
23LE50
TC-32LE60
Derivative Model TC-26LE60
20LA5
/ 4:3 Model
20LE50
20LE5
1-1-3. LCD Line-up for Y2006 (Latin America)
2005 2006
32LX50
TC-32LX60L
26LX50 LEADER
TC-26LX60L
19LX50
20LA5 4:3 Model
1-1-4. LCD Line-up for Y2006 (Mexico)
2005 2006
32LX50
TC-32LX60C
26LX50 LEADER
TC-26LX60C
19LX50
20LA5 4:3 Model
1-2. Product Summary
LX50 LX60C/L LX60 LX600
Screen Size 32/26/23/19 32/26 32/26/23 32/26
ATSC No Yes (except 23") Yes
Panel VA panel IPS Panel IPS Panel IPS plus panel
GC4PRO(32/26) Micronas VCTP *
Video Processor Micronas VCTP * Micronas VCTP *
GC3FM(23/19) w/ Vivid mode
POD (CATV)
SD card
PC input
HDMI 1 (32/26) 1 (w/HDAVI **) 1 (w/HDAVI) 2 (w/HDAVI)
Cosmetic LX50 design LX60 design LX60 design LX60 design
Color Gray Black & silver Black & silver All Black
Others Demo mode
* Video-Controller-Text Progressive ** Not available in LX60L
2. Chassis Structure
2-1. Location of PC board
Current 32/26LX50 New LX600/LX60
Control Unit
P AP
SP DG AP A
SP
DT P
DV G
(HDMI) (HDMI)
Inverter H Inverter
SP
SP V SP SP K
G K V
32"/26"only 32/26/LX600, 32/26LX60 only 23" only
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.
2-2. Function of PC board
Board Name Function 32/26LX600
32/26LX60 32/26LX60C
32/26LX60L
23LX60
A MAIN (Signal Processor, HDMI) Yes Yes Yes
P Power (Board Change Only) Yes Yes Yes
AP DC-DC Converter Yes Yes Yes
DT Digital Tuner Yes
G AV3 Terminal, Headphone Yes Yes
K Headphone Yes
V LED, Remote Receiver Yes Yes Yes
Control Unit KEYSCAN, Power SW Yes Yes Yes
3. Explanation for Signal Circuit
3-1. Differences from Current Models
Current 32/26LX50 New LX600
New LX60
DG LVDS
A
GC4L
AUDIO
DV SWITCH FPGA
GC4 HDMI
MPU
PRO
VCTP
H AUDIO SOUND VIDEO DT*
SWITCH CONTROL SWITCH HDMI
(CEC) ATSC
* 32/26/LX600, 32/26LX60 only
Differences from LX50:
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)
3-2-1. Video Signal Flow (LX600/LX60 except 23LX60)
LX600 only
IC5004 Analog
A HDMI1
HDMI Digital
HDMI2 I/F
Digital
DT Included OSD
IC8211 IC8240
IC4801
TUNER ATSC
LSI PEAKS Y/C
LITE (for Monitor Out) DT_VOUTENB
IC4001
OSD
VCTP
OSD
Analog
AV1 VIDEO
PROCESSOR
AV2
VIDEO
COMPONENT SWITCH
IC????
IC4004
Monitor Out
LCD
LVDS FPGA
Panel
LVDS LVDS
G AV3
(*) LVDS : Low Voltage Differential Signaling
3-2-2. Video Signal Flow (32/26LX60C/L)
IC5004 Analog
A
HDMI HDMI Digital
I/F
Digital
IC4001
OSD
VCTP
Analog
TUNER OSD
AV1 VIDEO
PROCESSOR
AV2
VIDEO
COMPONENT SWITCH
IC????
IC4004
Monitor Out
LCD
LVDS FPGA
Panel
LVDS LVDS
G AV3
(*) LVDS : Low Voltage Differential Signaling
3-2-3. Video Signal Flow (23LX60)
IC5004 Analog
A
HDMI HDMI Digital
I/F
Digital
IC4001
OSD
VCTP
Analog
TUNER OSD
AV1 VIDEO
PROCESSOR
AV2
VIDEO
COMPONENT SWITCH
IC????
IC4004
Monitor Out
LCD
LVDS FPGA
Panel
LVDS LVDS
G AV3
(*) LVDS : Low Voltage Differential Signaling
3-3-1. Audio Signal Flow (LX600/60 except 23LX60)
LX600 only
IC4001
A IC5004 Analog
HDMI1 VCTP
Digital
HDMI2 HDMI I/F
L
L/R IC2001
DT IC8232
IC8200Audio MSP
IC8211 IC8240 Audio
TUNER ATSC Audio SW AMP
LSI DAC SW R
Digital IC8244
Audio OUT PEAKS Audio IC2005
LITE ADC L/R
HP
AMP
L/R IC2006 L/R
L/R
AV1
L/R
AV2
L/R L/R
DVI (Analog) AUDIO
L/R SWITCH
Audio In
L/R
Monitor Out
L/R
G AV3
Headphone
3-3-2. Audio Signal Flow (32/26LX60C/L)
IC4001
A IC5004
Analog
VCTP
HDMI Digital
HDMI I/F
L
L/R IC2001
MSP
Audio
AMP
SW R
L/R IC2005
L/R
HP
IC2006 AMP
L/R L/R
TUNER IC2202
L/R
AV1
L/R
AV2
L/R
L/R AUDIO
DVI (Analog) SWITCH
L/R
Audio In
L/R
Monitor Out
L/R
G AV3
Headphone
3-3-3. Audio Signal Flow (23LX60)
IC4001
A IC5004
Analog
VCTP
HDMI Digital
HDMI I/F
L
L/R IC2001
MSP
Audio
AMP
SW R
L/R IC2005
L/R
HP
IC2006 AMP
L/R L/R
TUNER IC2202
L/R
AV1
L/R
AV2
L/R
L/R AUDIO
DVI (Analog) SWITCH
L/R
Audio In
L/R
Monitor Out
L/R
K AV3
Headphone
4. Explanation for Power Supply Circuit
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
32/26LX600
Voltages
32/26LX60 32/26LX60C 32/26LX60L 23LX60
AC voltage 120V 120V 100V~240V 120V
24V 24V 24V
24V
P board output 10V 10V 33V
STB7V
STB7V STB7V STB7V
30V
30V 30V 30V
AP board output for Tuner MAIN 9V
MAIN5V MAIN5V MAIN5V
MAIN5V
AP board output for Audio AMP 18.5V 18.5V 18.5V 16.5V
4-2-1. Power Supply Outline (LX600/LX60 except 23LX60)
A12 DT12 DT
8 8 BT_30V
P AP 51-53 51-53 MAIN_9V
BT_30V 54,57 54,57 MAIN_5V
24V CN3 AP2
24V Q7212 LED(R)
MAIN 1-3 1-3
AP3 A3
Trans 10V
4,5 4,5
IC7209
MIX 7 7 A1 V1 V
SUB_ON 13 13 SUB_9V 2,3 2,3 SOUND 18V 4 4 STB_3.3V
11 11 9V 17-19 17-19 MAIN 9V 7 7 LED(R)
12 12 21,22 21,22 MAIN 5V
IC7218 2 LED(R)
SOUND_18V MAIN 8V
IC4002
18V MAIN 5V
Relay Q7223
Q7301
Q7224 STB 3.3V IC4001
IC7210 IC1806 (VCTP)
RELAY
MAIN_9V STB 1.8V
9V AP4 A4 IC1807
Q7450 STB7V
3 3 IC1803 8 VCTP_RESET
IC7205 SUB9V
22 22 1 SUB9VSENSE
STB MAIN_5V
Trans 5V 8 8 101 SUB_ON
STB_7V Q7303 102 MAIN_ON
Power SW 6 6
IC7212 R
PANEL_12V 7 7 161 KEY_SCAN
POWER
24V 12V 15 15 Q1801 MAIN 3.3V
Q7701 Q1802 105
11 11
Relay Q7702
STB 3.3V IC1102
12 12 (EEPROM)
AP1 24V
Line MAIN 3.3V IC4004
Filter CN2 1-9
MAIN 2.5V (FPGA)
AP5 1-4 1-4 AP7 IC1805
A2 FPGA_OK
CN1 PANEL 12V MAIN 1.5V
3 28-31 IC1804 97
1
11 PANEL _ON
INV ON A5
3 7 INV_ON
MAIN 1.8V
IC5005
IC4003
MAIN 3.3V (PROM)
INVERTER LCD Panel MAIN 5V IC4005
24V 12V (PLL)
4-2-2. Power Supply Outline (32/26LX60C)
AP AP5 INVERTER
P 24V
CN2 AP1 AP7 24V
IC7212 LCD Panel
PANEL_12V
AP4 A4 A A2 12V
12V 11 11
12 12 IC2006
PANEL_ON SUB9V
22 22 (Audio
IC7209 SW)
SUB_9V Tuner
9V
BT
AP3 A3
30V
MIX 7 7 BT_30V
24V CN3 AP2 24V IC7218
SOUND_18V 2 2 MAIN_5V
1 1 18V
2 2 IC2001
MAIN_ON 3 3
MAIN (Audio
3 3
Trans IC7210 17 17 AMP)
4 4 MAIN_9V MAIN_9V SUB9VSENSE
10V 9V 18 18 IC4001
5 5 19 19
MAIN_ON MAIN 8V (VCTP)
12 12 IC4002
IC7205 21 21 MAIN_5V
STB MAIN_5V 22 22
5V RESET
Trans IC1803
STB_7V MAIN_ON STB1.8V
AP4 A4 IC1807
STB7V STB3.3V
3 3 IC1806
MAIN3.3V
Q1801
Q1802 STB 3.3V IC1102
Line (EEPROM)
Filter MAIN3.3V
MAIN_ON IC4004
MAIN 2.5V
CN1 IC1805 (FPGA)
3 MAIN 1.5V
IC1804
1
MAIN 3.3V IC4003
(PROM)
MAIN 5V IC4005
(PLL)
MAIN3.3V
IC5004
MAIN 1.8V (HDMI)
IC5005
MAIN 5V IC5002
(EEPROM)
A1 V1 V
4 4 STB_3.3V
4-2-3. Power Supply Outline (32/26LX60L)
AP AP5 INVERTER
P 24V
CN2 AP1 AP7 24V
IC7212 LCD Panel
PANEL_12V
AP4 A4 A A2 12V
12V 11 11
12 12 IC2006
PANEL_ON SUB9V
22 22 (Audio
IC7209 SW)
SUB_9V Tuner
9V
BT
AP3 A3
30V
MIX 7 7 BT_30V
24V CN3 AP2 24V IC7218
SOUND_18V 2 2 MAIN_5V
1 1 18V
2 2 IC2001
MAIN_ON 3 3
MAIN (Audio
3 3
Trans IC7210 17 17 AMP)
4 4 MAIN_9V MAIN_9V SUB9VSENSE
9V 18 18 IC4001
5 5 19 19
MAIN_ON MAIN 8V (VCTP)
12 12 IC4002
IC7205 21 21 MAIN_5V
STB MAIN_5V 22 22
5V RESET
Trans IC1803
STB_7V MAIN_ON STB1.8V
AP4 A4 IC1807
STB7V STB3.3V
3 3 IC1806
MAIN3.3V
Q1801
Q1802 STB 3.3V IC1102
Line (EEPROM)
Filter MAIN3.3V
MAIN_ON IC4004
MAIN 2.5V
CN1 IC1805 (FPGA)
3 MAIN 1.5V
IC1804
1
MAIN 3.3V IC4003
(PROM)
MAIN 5V IC4005
(PLL)
MAIN3.3V
IC5004
MAIN 1.8V (HDMI)
IC5005
MAIN 5V IC5002
(EEPROM)
A1 V1 V
4 4 STB_3.3V
4-2-4. Power Supply Outline (23LX60)
AP AP5 INVERTER
P 24V
24V
IC854
PANEL_12V
AP4 A4 A LCD Panel
12V 11 11 A2 12V
12 12
PANEL_ON SUB9V
22 22 IC2006
IC852 MAIN_9V (Audio
SUB_9V Q1807 SW)
9V
Tuner
AP3 A3 MAIN_ON
CN2 AP1 IC855 7 7 BT_30V
24V 19 1 24V SOUND_16.5V
16.5V MAIN_5V
18 2
2 2 IC2001
17 3 MAIN_ON (Audio
MAIN
16 4 IC869 AMP)
Trans 3 3
33V BT30V SUB9VSENSE
1 19 30V IC4001
21 21 MAIN 8V (VCTP)
7 13 IC853 IC4002
MAIN_5V MAIN_5V
STB 5V
22 22 RESET
Trans MAIN_ON IC1803
STB_7V STB1.8V
AP4 A4 IC1807
STB7V STB3.3V
3 3 IC1806
MAIN3.3V
Q1801
Q1802 STB 3.3V IC1102
Line (EEPROM)
Filter MAIN3.3V
MAIN_ON IC4004
MAIN 2.5V
CN1 IC1805 (FPGA)
3 MAIN 1.5V
IC1804
1
MAIN 3.3V IC4003
(PROM)
MAIN 5V IC4005
(PLL)
MAIN3.3V
IC5004
MAIN 1.8V (HDMI)
IC5005
MAIN 5V IC5002
(EEPROM)
A1 V1 V
4 4 STB_3.3V
4-3-1. AP Board Regulator Circuit
IC7205(*)
10V AP
Q7303
5V MAIN 5V
24V
IC7218
18V SOUND 18V
15V
Q7301
IC7210 (*) MAIN_5V
Q7208 Q7212 is regulated
9V MAIN 9V from 24V
Q7214 in LX60L
Q7450
MIX BT 30V
IC7209
9V SUB 9V
DC-DC ON/OFF Control
IC7212
12V PANEL 12V
Q7701
Q7702
Q7508
Regulator
A
PANEL_ON from FPGA
MAIN_ON from VCTP
4-3-2. AP Board Operation
IC7205(*)
10V AP
10V
Q7303
5V MAIN 5V
24V
24V
IC7218
15V H L 18V SOUND 18V
ON Q7301
IC7210 (*) MAIN_5V
Q7208 Q7212 is regulated
OFF 9V MAIN 9V from 24V
Q7214 in LX60L
Q7450
L MIX BT 30V
IC7209
9V ON SUB 9V
IC7212
12V PANEL 12V
Q7701
OFF Q7702
Q7508
A
L
PANEL_ON from FPGA
MAIN_ON from VCTP
4-3-3. AP Board Operation
IC7205(*)
10V AP
10V
Q7303 H 5V MAIN 5V
24V L OFF ON
24V
IC7218
15V H L H 18V SOUND 18V
ON Q7301
ON L OFF ON (*) MAIN_5V
Q7208 IC7210
Q7212 is regulated
OFF 9V MAIN 9V from 24V
Q7214
Q7450
H in LX60L
H ON
L L OFF MIX BT 30V
IC7209
9V ON SUB 9V
IC7212
12V PANEL 12V
Q7701
OFF Q7702
Q7508
A
L
PANEL_ON from FPGA
H
MAIN_ON from VCTP
4-3-4. AP Board Operation
IC7205(*)
10V AP
10V
Q7303 H
5V MAIN 5V
OFF ON
24V L
24V
IC7218
15V H L H 18V SOUND 18V
ON Q7301
ON L OFF ON (*) MAIN_5V
Q7208 IC7210
Q7212 is regulated
OFF 9V MAIN 9V from 24V
Q7214 H in LX60L
Q7450
H ON
L L OFF MIX BT 30V
IC7209
9V ON SUB 9V
IC7212
12V PANEL 12V
Q7701 H
ON L ON
OFF Q7702 L OFF
Q7508
A
L
H H
PANEL_ON from FPGA
H
MAIN_ON from VCTP
4-4. LCD Panel Interface
A- BOARD LCD Panel Unit (Not Repairable,
Unit change Only)
IC4001 IC4004
A2 Panel LCD Glasses
LVDS 4ch LVDS 4ch Controller
Horizontal
Gate Driver
LVDS CLK LVDS CLK
FPGA 28
Vertical
Panel 12V 29
Source
VCTP 30
Driver
31
Inverter_SOS (H:SOS) 6 2
Inverter_ON (H:ON) 7 3
For Current
Analog LPF control
KAN_PWM 165 4
(Q1803,Q1804 Inverter
Level Transfer INV-PWM Board
KIDO_PWM 166 5
(Q1806,Q1805)
A4 11 12 A5 Back
AP4 11 12 Lights
P AP AP5
24V
IC7212 1~4
Panel 12V
CN2 AP1 AP7
Transformer 24V 24V
1~9 1~4
5. Explanation for Protection Circuit
5-1. Protection Trouble Cases
When detecting irregular voltage, the circuit goes to stand-by mode to prevent
damages by over-voltage or short circuit. The power LED starts blinking as below.
Blinking Check Point
Times VCTP's FPGA's
Contents (Example)
Pin No. Pin No.
LCD
2 Inverter SOS No.6 H:SOS
P board
SUB_9V down No.1 L:SOS AP board
6
A board
DOWN :10V, BT 30V, SOUND 18V,
PANEL 12V,
MAIN 5V, MAIN 9V AP board
Over Voltage : A board
7 No.160 L:SOS DT board(**)
STB 3.3V,STB 1.8V
10V(*), 24V, SUB 9V, Tuner
MAIN 5V, MAIN 9V, LCD
SOUND 18V, PANEL 12V
8 FPGA SOS No.105 H:SOS A board
LED Blink signal
(*) except LX60L
Once 3.0sec (interval) (**) LX600/60 only
Light
No Light
5-2. LED 2 times Blink
Normal ( Low) Normal ( Low)
LED Blink : 2 times Inverter_SOS
Abnormal (Open) Abnormal (High)
LCD 24VSOS
Inverter Inverter 3.3V
A5
IC4004
FPGA
A
H
2 6 INV_SOS
3 7 INV_ON
5 SCL0 47
AP5 2,3,6,7 1~4 AP7 SDA0 48
P CN2 AP1 24V AP
1-9 1-9 IC4001
MAIN
VCTP
Trans CN3 AP2 24V
-former 166 KIDO_PWM
1-3 1-3
SDA0 109
AP2 A2 AP4 A4
SCL0 110
Relay
13 13 8 8 101 SUB_ON
Relay OFF L
AC STB
Voltage Trans
-former
Relay is turned off
Standby mode
(LED Blink : 2 times)
5-3. LED 6 times Blink
LED Blink : 6 times
SUB_9V down
P CN3 AP2 24V AP A
MAIN
1-3 1-3
Trans IC4001
-former
IC7209 AP4 A4 VCTP
SUB_9V L
9V 22 22 1 SUB_9VSENSE
CN3 AP2
13 13 8 8 101 SUB_ON
L
Relay Relay OFF
AC STB
Voltage Trans
-former
Relay is turned off
Standby mode
(LED Blink : 6 times)
5-4. LED 7 times Blink (Case1)
DOWN :10V(*),BT 30V,SOUND 18V,PANEL 12V,MAIN 5V,MAIN 9V
LED Blink : 7 times
Overvoltage : STB 3.3V,STB 1.8V
IC1806 Q3862 STB 3.3V
STB 3.3V D3862 H A
3.3V L Q3861
ON
D3868 ON
IC4001
IC1807 L VCTP
STB 1.8V MAIN9V D3865 H
1.8V ON 160 TV_SOS
L (L:SOS)
MAIN5V D3866 Q3860
A3 17-19 21,22 SUB_ON
AP3 17-19 21,22 101
IC7210
AP 9V L
IC7205 AP4 AP4
MAIN 5V 4 4
5V
10V(*) D7220 Q7210
L
IC7209 ON Relay is turned off
SUB 9V BT30V D7208
9V MIX
IC7218 H
SOUND 18V D7469 ON Standby mode
18V
Q7211 (LED Blink : 7 times)
IC7212 D7472
Panel 12V
12V (*) except LX60L
5-5-1. LED 7 times Blink (Case2)
Overvoltage : 10V(*),24V,SUB_9V,MAIN_5V,MAIN_9V,
LED Blink : 7 times
SOUND_18V,PANEL_12V
P CN3 AP2 24V AP A
MAIN
1-3 1-3 STB_3.3V
Trans
4,5 4,5
10V IC4001
-former IC7209
SUB_9V Q3861 VCTP
9V
160 TV_SOS
IC7218 (L:SOS)
Q7223 SOUND_18V
Relay CN3 AP2 18V Q3860
11 11
IC7210 AP3 A3
MAIN_9V
9V 17 17
Relay 18 18
Q7224 19 19
IC7205 (*)
CN3 AP2 MAIN_5V 21 21
13 13 5V
22 22
IC7212
PANEL_12V
AC STB 12V
Voltage Trans CN3 AP2
-former 27V 13V 13V 18V
12 12 STB 7V
Q7205 15V 22V 7.5V
ON L
SUB_ON
H H
ON ON (*) MAIN_5V is regulated
Q7204 Q7207 H from 24V in LX60L
5-5-2. LED 7 times Blink (Case2)
Overvoltage : 10V(*),24V,SUB_9V,MAIN_5V,MAIN_9V,
LED Blink : 7 times
SOUND_18V,PANEL_12V
P CN3 AP2 24V AP A
MAIN
1-3 1-3 STB_3.3V
Trans
4,5 4,5
10V IC4001
-former IC7209
SUB_9V Q3861 VCTP
OFF 9V
160 TV_SOS
IC7218 (L:SOS)
Q7223 SOUND_18V
Relay CN3 AP2 OFF 18V Q3860
11 11
H L IC7210 AP3 A3
OFF MAIN_9V
9V 17 17
Relay 18 18
Q7224 19 19
IC7205 (*)
CN3 AP2 MAIN_5V 21 21
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