LG 55LZ9600-JA (CHASSIS:LE13F) Service Manual ▷ View online
Checking method
1. Press the MENU button on the remote controller
2. Select the AUDIO function of the Menu
3. Select TV Speaker from Off to On
Standard Repair Process Detail Technical Manual
Checking method in menu when there is no audio
C. Audio error_No audio/Normal video
<ALL MODELS>
A24
Established
date
Revised
date
Error
symptom
Content
LCD TV
A24
Standard Repair Process Detail Technical Manual
Voltage and speaker checking method
when there is no audio
when there is no audio
C. Audio error_No audio/Normal video
A25
Established
date
Revised
date
Error
symptom
Content
LCD TV
A25
2011. 01 .18
Checking order when there is no audio
① Check the contact condition of
20V or 24V connector of Main Board
② Measure the 24V input voltage
supplied from Power Board
(If there is no input voltage,
remove and check the connector)
(If there is no input voltage,
remove and check the connector)
③ Connect the tester RX1 to the speaker
terminal and if you hear the Chik Chik
sound when you touch the GND and output
terminal, the speaker is normal.
sound when you touch the GND and output
terminal, the speaker is normal.
Edge LED 22/26
<Under 26”>
1
24V
2
24V
3
24V
4
24V
5
24V
6
GND
7
GND
8
GND
9
GND
10
GND
11
NC
12
INV_ON
13
PWM_DIM
14
ERROR_OUT
Pin layout (24P)
Error-out
24
NC
23
LE : PWM Dim #1
IOP : NC
22
12V
21
LE : NC
IOP : PWM Dim #1
20
12V
19
Inverter ON
18
12V
17
NC
16
GND
15
GND
14
GND
13
3.5V
12
3.5V
11
3.5V
10
3.5V
9
GND
8
GND
7
GND
6
GND
5
24V
4
24V
3
24V (IOP & Edge
55”)
20V (Edge 42/47)
2
Power
on
1
Pin layout (24P)
Checking order
1, 2. Check IR cable condition between IR & Main board.
3. Check the st-by 3.3V on the terminal 6.
4. When checking the Pre-Amp when the power is in ON condition, it is normal when
3. Check the st-by 3.3V on the terminal 6.
4. When checking the Pre-Amp when the power is in ON condition, it is normal when
the Analog Tester needle moves slowly, and defective when it does not move at all.
Standard Repair Process Detail Technical Manual
Remote controller operation checking method
D. Function error_ No response in remote controller,
key error
<ALL MODELS>
A27
Established
date
Revised
date
Error
symptom
Content
LCD TV
A27
1
2
S/T_SCL
14
S/T_SDA
15
LED_R
12
GND
13
Normal 3.3V
11
GND
10
IR
9
LED_B
8
GND
7
St 3.3V
6
KEY2
5
KEY1
4
GND
3
SDA
2
SCL
1
3
4
2010. 2 .19
HDMI 1
NAND Flash
(4Gb)
4x1
HDMI Switch
TDA19997
I2C
DDR_D0[0:15], DQS, DM …
Addr.[ 0:13], ctrl. Data
BCM3558
Main SOC
400Mhz
32bit
MIPS Dual
Data [0 … 7]
CVBS, L/R, D5 L/R
HDMI 2
HDMI 3
JACK PACK
JACK PACK
at REAR
at REAR
JACK PACK
JACK PACK
At sub PCB
At sub PCB
ISDB-T/S
1400Yen
(HST-J222DHT)
Hitachi Tuner
TC90522XBG
TOSHIBA DEMOD
DDR2 (1Gbit)
DDR2 (1Gbit)
DDR2 (1Gbit)
DDR2 (1Gbit)
DDR_D1[0:15], DQS, DM …
X-tal
54MHz
DATA
CLK
Block Diagram
Block Diagram
(LE13F)
(LE13F)
-
-
MAIN
MAIN
Digital AMP
NTP7100
I2C_1(0x54)
PSK1 I/Q
PSK2 I/Q
OFDM1 N/P
OFDM2 N/P
MP2403
SCL/SDA, OFDM/PSK
PSK2 CLK,DATA,SYNC
PSK1 CLK,DATA,SYNC
OFDM1 CLK,DATA,SYNC
OFDM2 CLK,DATA,SYNC
I2C_0 SCL/SDA
PSK, OFDM AGC
24V
LNB 16V
5V
3.3V
3.3V
1.2V
RESET
3.3/5V
RESET
X-tal
16Mhz
B-CAS Slot
TDA8024
B-CAS
IC
RST,SW
I/O, CLK
RST,VCC,RES
I/O, CLK
3.3V 5V
24V
3.3V 1.8V
1.2V
2.5V
3.3V
SDA1/SCL1
3.5V
NVRAM
SCL, SDA_3.3V
3.3V
Ethernet Connect
USB /DVR Ready
DP/DM/ +5V
USB
CVBS, L/R
AV1 Phone JACK
41p(P4001)
Digital Audio (Optic)
RS-232C (Ctrl./SVC)
MAX3232
SPDIF
RX/TX
3.5V
Y Pb Pr, L/R
D5(1080P)
MICOM
(uPD78F0514)
SCL, SDA_3.3V
X-tal
10MHz
3.5V
32.768KHz
D-sub RGB
RGB/H/V
Audio L/R
Audio L/R (for RGB)
41p
Y Pb Pr ,DET
HP Phone JACK
41p(P4001)
Transrecevier
STDP4028AB
UART
DATA
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