LG 32LH70 (CHASSIS:LA92D) Service Manual ▷ View online
- 17 -
6. HDMI doesn’t display
Check input c onnect JK600, JK601, JK602,
JK603
Can you see the normal waveform?
Check DDC communication lines(IC600,
IC601)
Check the input of HDMI Switch(IC600)
This signal is TMDS.
Can you see the normal waveform?
YES
YES
NO
JK600, JK601, JK602, JK603
may have problem. Replace this Jack.
Check the output of HDMI Switch(IC600).
Can you see the normal waveform?
YES
YES
NO
After checking the trace of TMDS lines and power of
HDMI Switch, you should decide to replace HDMI
Switch or not.
NO
NO
After checking the Power of this chip, you
should decide to replace this or not.
After checking the Power of HDMI Switch you
should decide to replace HDMI Switch or not.
YES
Check HDCP communication lines(IC601)
NO
After checking the Power of this chip, you
should decide to replace this or not.
Check the output of Main IC(IC100).
Especially you should check
The H,V sync and clock.
Can you see the normal waveform?
YES
NO
After checking the Power of Main IC(IC100) you
should decide to replace Main IC or not.
This board has big problem because Main
IC(IC100) have some troubles.
After checking thoroughly all path once again,
You should decide to replace Main Board or not.
- 18 -
BLOCK DIAGRAM
D-sub RGB
AV
2
CV
BS
, L
/R
DDR2 (5
12Mb
it
)
Qimonda/Hy
nix
NAND Flash
(512Mb
it)
Digita
l AMP
NT
P3100L
RS-232C (Ctrl./SVC)
I2S
EEPROM
RGB/
H/V
DD
R_Data[
0:
15]
, D
Q
S,
DM
DDR2 (1Gb
it)
Qimonda/Hy
nix
Data[1
6:31]
Ad
dr.[ ]
, ctrl. data
MAX3
232
Saturn6
Saturn6
(ATSC
(ATSC
KOREA)
KOREA)
D
a
ta [0
7]
X-t
al
JT
A
G
C
L
K,T
D
I,T
D
O
,M
S,
R
S
T
AV
1
Compone
nt 1
Y
Pb
Pr, L/R
CV
BS
, L
/R
C
S
,R
E,
WE
Compone
nt 2
Y
Pb
Pr, L/R
Au
d
io L/R
A
u
dio L/R (for
RGB)
RX
/T
X
R
X
/TX
12MHz
J
A
CK
P
A
CK
J
A
CK
P
A
CK
at RE
A
R
at RE
A
R
SCL
, SDA
_3
.3
V
FRC IC
(MST
7329N)
DDR2(
256M
bit
)
Qimonda/Hy
nix
FRC Block
FRC Block
LV
D
S
LCD Module
(FHD, 120Hz)
HDMI 1
Digita
l A
udio
(Optic
)
4x1
HDMI S
w
itch
T
D
A9996
HL
HDMI4
HDMI 2
HDMI 3
SP
DI
F
USB2.0
DP
/D
M
O.C. Protector
+5V
+5V
Chip Tuner
IF
+/-
SIF
TU_CVBS
R
e
set / IF
_AGC
SDA
/SCL_
5V
T
R
B
u
ffer
VSB
Demod.
LGDT3305
T
S
In[0
7]
TS_
cl
k, SOP, Va
l
SCL
, SDA
_3
.3
V
Res
et
S
w
itch
Reset IC
B
lu
e
tooth
Do
ngl
e
DP
/D
M
X-t
al
12MHz
- 19 -
EXPLODED VIEW
900
530
540
570
400
200
200T
200N
300
510
500
560
120
121
310
520
550
806
803
801
802
804
805
810
122
910
820
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These
parts are identified by in the Schematic Diagram and EXPLODED VIEW.
It is essential that these special safety parts should be replaced with the same components as
recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
parts are identified by in the Schematic Diagram and EXPLODED VIEW.
It is essential that these special safety parts should be replaced with the same components as
recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
IMPORTANT SAFETY NOTICE
A2
LV1
A10
LV2
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
PCM_A[0]
PCM_A[1]
PCM_A[2]
PCM_A[3]
PCM_A[4]
PCM_A[5]
PCM_A[6]
PCM_A[7]
PCM_A[7]
PCM_A[6]
PCM_A[5]
PCM_A[4]
PCM_A[0]
PCM_A[1]
PCM_A[3]
PCM_A[2]
PCM_A[10]
PCM_A[11]
PCM_D[5]
PCM_D[6]
PCM_D[7]
FE_TS_DATA[0]
FE_TS_DATA[1]
FE_TS_DATA[3]
FE_TS_DATA[2]
FE_TS_DATA[5]
FE_TS_DATA[4]
FE_TS_DATA[7]
FE_TS_DATA[6]
ISP_TXD
EEPROM_SDA
USB_DM
USB_DP
FE_TUNER_SDA
IC102
HY27US08121B-TPCB
NAND_FLASH
26
NC_17
27
NC_18
28
NC_19
29
I/O0
30
I/O1
31
I/O2
32
I/O3
33
NC_20
34
NC_21
35
NC_22
36
VSS_2
37
VCC_2
38
PRE
39
NC_23
40
NC_24
41
I/O4
42
I/O5
43
I/O6
44
I/O7
45
NC_25
46
NC_26
47
NC_27
48
NC_28
17
ALE
3
NC_3
6
NC_6
16
CLE
15
NC_10
14
NC_9
13
VSS_1
12
VCC_1
11
NC_8
10
NC_7
9
CE
8
RE
7
R/B
4
NC_4
5
NC_5
25
NC_16
24
NC_15
23
NC_14
2
NC_2
22
NC_13
21
NC_12
1
NC_1
20
NC_11
19
WP
18
WE
Q100
KRC103S
KRC103S
OPT
E
B
C
+3.3V
PCM_A[0-7,10-11]
+3.3V
+3.3V
SPI_DI
/PF_CE0
SPI_CS
+3.3V
Q101
KRC103S
E
B
C
+3.3V
+3.3V
S6_Reset
001:H28
FE_TUNER_SCL
SDA0
SCL0
EEPROM_SCL
SCL1
SDA1
SDA_SUB/AMP
SCL_SUB/AMP
TDA9996_SDA
TDA9996_SCL
Flash_WP_1
R140
22
R141
22
R128
0
R126
0
R129
0
R127
0
R174
0
R175
0
R100
0
R102
0
OPT
R197
15K
OPT
R196
15K
OPT
EEPROM_SDA
R193
1M
1M
R172
0
AR102
22
AR103
22
/PF_CE0
/PF_CE1
/PF_OE
/PF_WE
PF_WP
PF_ALE
/F_RB
AR100
22
AR101
22
/F_RB
/PF_OE
/PF_WE
/PF_CE1
PF_ALE
PF_WP
PCM_A[0-7]
SPI_CS
SPI_CK
SPI_CK
SPI_DO
+3.3V_ST
SW100
SWITCH
1
2
4
3
R101
0
SPI_DO
SPI_DI
PCM_D[5-7]
/PCM_OE
/PCM_CE
MEMC_SDA
MEMC_SCL
R131
0
R130
0
FE_DEMOD_SDA
SCL0
FE_DEMOD_SCL
R122
0
SDA0
R123
0
FE_TS_DATA[0-7]
IR
A_DIM
C110
1uF
OPT
OPT
R146
0
POWER_ON/OFF
+3.3V_ST
R181
100
PANEL_CTL
SUB_WARM_ST
SB_MUTE
INV_CTL
R187
100
OPT
R159
100
VGA_EEPROM_WP
Flash_WP_1
R155
100
R157
100
NTP_MUTE
R190
100
AMP_RST
ERROR_OUT
R183
100
OPT
R166
100
KEY2
KEY1
R170
22
R169
22
R188
100
USB_OCD
R192
100
USB_CTL
PWM1
PWM0
PWM0
+3.3V
PWM1
PWM0
DBG_RX
+3.3V
+5V_GENERAL
FE_TUNER_SCL
FE_TUNER_SDA
BT_DM
BT_DP
C104
0.1uF
C106
0.1uF
C100
0.1uF
0.1uF
C103
0.1uF
R178
0
R179
0
R173
0
R1513
33
R1516
33
R1510
33
R1517
33
R1511
33
R1518
33
R1512
33
R1519
33
R186
100
R177
100
OPT
R182
100
R156
100
R184
100
R160
100
R185
100
R199
1K
OPT
R198
1K
R112
1K
OPT
R105
1K
1K
OPT
R1501
1K
R1500
1K
OPT
R103
10K
R104
10K
R195
10K
R111
3.9K
R1524
33
R1525
33
R1526
33
R1530
33
R1533
4.7K
+3.3V
SDA1
EEPROM_SCL
EEPROM_SDA
R125
4.7K
R124
4.7K
EEPROM_SCL
R1539
1K
R1540
1K
SCL1
L102
BLM18PG121SN1D
P102
SMW250-04
OPT
1
2
3
4
ISP_TXD_TR
ISP_RXD_TR
ISP_RXD
R1542
OPT
R1543
OPT
+5V_GENERAL
IC103
MX25L3205DM2I-12G
3
WP#
2
SO
4
GND
1
CS#
5
SI
6
SCLK
7
HOLD#
8
VCC
IC105
M24512-WMW6
3
E2
2
E1
4
VSS
1
E0
5
SDA
6
SCL
7
WC
8
VCC
R151
0
X100
12MHz
ISP_TXD
DBG_RX
DBG_TX
R142
22
R143
22
BT_ON/OFF
OPC_EN
R1534
22
OPC_EN
+12V
+5V_GENERAL
POWER_DET
+3.3V_ST
POWER_DET
R1560
100
OPT
R1553
1K
L103
R1506
1.2K
R1507
1.2K
R165
0
R162
0
R163
0
R164
0
R1537
0
R1538
0
R1535
0
R1536
0
DBG_TX
LED_ON
R150
0
R1504
1.2K
OPT
R1505
1.2K
OPT
MEMC_RESET
TUNER_RESET
VSB_RESET
R1602
0
+3.3V
R1609
1K
R1610
OPT
R1607
OPT
R1605
OPT
R1608
OPT
R1603
OPT
R1604
OPT
Q102
2SC3052
2SC3052
E
B
C
Q103
2SC3052
2SC3052
E
B
C
C105
10uF 6.3V
R1612
OPT
R1613
OPT
R167
100
C111
20pF
C112
20pF
R1503
1.2K
R1502
1.2K
C109
2.2uF
2.2uF
R148
0
R1552
10K
R1561
2.2K
+24V
R1565
OPT
PWM2
PWM1
R153
100
PWM_DIM
PWM2
R145
OPT
R149
0
R1554
10K
R158
10K
OPT
+3.3V_ST
Q105
2SC3052
2SC3052
E
B
C
POWER_ON_DELAY
Q107
2SC3052
2SC3052
E
B
C
+3.3V_ST
R116
10K
S6_Reset
R115
100
R114
4.7K
R118
10K
R117 100
C107
4.7uF
10V
C108
10uF
6.3V
R119
0
R1550
15K
R1551
1.1K
R110
OPT
R1549
1K
R1541
OPT
R1566
30K
1/10W
1%
R1567
5.1K
1/10W
5%
R1532
OPT
+5V_ST
R144
1.2K
R189
0
R168
0
FE_TS_SYNC
FE_TS_VALID
FE_TS_CLK
RL_ON/LED_MOVING
R107
100
OPT
+5V_GENERAL
R1515
10K
R1514
10K
CONTROL_ATHEN
L101
OPT
+5V_GENERAL
R120
4.7K
OPT
R121
4.7K
OPT
R132
22
POWER_EN
BT_AU_SW
HP_AU_SW
R194
0
OPT
POWER_DET
R191
100
R113
10K
OPT
/PCM_CE
R106
1K
PCM_A[10]
/PCM_OE
PCM_D[6]
R135
0
OPT
PCM_A[11]
R137
0
R139
0
+3.3V
R136
0
OPT
R108
10K
R133
0
PCM_D[7]
PCM_D[5]
R138
0
R134
0
R109
10K
IC106
MAX810RTR
1
GND
3
VCC
2
RESET
IC107
NCP803SN293
1
GND
3
VCC
2
RESET
IC100
LGE3369A (Saturn6 Non RM)
HWRESET
D4
PCMD0/CI_D0
AC16
PCMD1/CI_D1
AA15
PCMD2/CI_D2
AA16
PCMD3/CI_D3
AC6
PCMD4/CI_D4
Y10
PCMD5/CI_D5
Y11
PCMD6/CI_D6
Y12
PCMD7/CI_D7
Y13
PCM_A0/CI_A0
AB16
PCM_A1/CI_A1
AC15
PCM_A2/CI_A2
AC14
PCM_A3/CI_A3
AB14
PCM_A4/CI_A4
AC12
PCM_A5/CI_A5
AB8
PCM_A6/CI_A6
AC13
PCM_A7/CI_A7
AA9
PCM_A8/CI_A8
AB5
PCM_A9/CI_A9
AA4
PCM_A10/CI_A10
V4
PCM_A11/CI_A11
Y4
PCM_A12/CI_A12
AB9
PCM_A13/CI_A13
AA7
PCM_A14/CI_A14
AD6
PCM_RST/CI_RST
AA14
PCM_CD/CI_CD
AB18
/PCM_OE
Y5
PCM_REG/CI_CLK
AB15
PCM_WAIT/CI_WACK
AA10
/PCM_IRQA
AC8
/PCM_WE
AC7
PCM_IOWR/CI_WR
AA5
PCM_IOR/CI_RD
W4
/PCM_CE
T4
/PF_CE0
AE6
/PF_CE1
AF6
/PF_OE
AA12
/PF_WE
AA11
PF_ALE
AC9
PF_AD15
Y14
F_RBZ
AB11
UART2_TX/SCKM
F8
UART2_RX/SDAM
D11
DDCR_DA
AB21
DDCR_CK
AC21
DDCA_CLK
J1
DDCA_DA
J2
UART_RX2
W5
UART_TX2
V5
PWM0
AB13
PWM1
AB12
PWM2
AD12
PWM3
AA13
SAR0
A4
SAR1
B4
SAR2
F4
SAR3
E4
IRIN
C4
GPIO44
AC11
GPIO96
D9
GPIO88
D10
GPIO90/I2S_OUT_MUTE
D7
GPIO91
E11
GPIO97
E8
GPIO98
E10
GPIO99
D6
GPIO103/I2S_OUT_SD3
D5
GPIO102
C5
XIN
B3
XOUT
A3
TESTPIN/GND
E6
SPI_DI
AE11
SPI_DO
AF12
/SPI_CS
AE12
SPI_CK
AD11
USB_DP_1
B5
USB_DM_1
A5
USB_DM_2
AC10
USB_DP_2
AB10
GPIO_PM0/GPIO134
E5
GPIO_PM1/GPIO135
F5
GPIO_PM2/GPIO136
G5
GPIO_PM3/GPIO137
H5
GPIO_PM4/GPIO138
F6
GPIO_PM5/INT1/GPIO139
G6
GPIO_PM6/INT2/GPIO140
H6
GPIO131/LDE/SPI_WPn1
AC17
GPIO130/LCK
AB17
GPIO132/LHSYNC/SPI_WPn
AF11
GPIO60/PCM2_RESET/RX1
AA18
GPIO62/PCM2_CD_N/TX1
AA17
LHSYNC2/I2S_OUT_MUTE/RX1
E7
LVSYNC/GPIO133
AC18
GPIO79/LVSYNC2/TX1
C6
UART2_RX/GPIO84
F9
UART2_TX/GPIO85
F10
UART1_RX/GPIO86
A6
UART1_TX/GPIO87
B6
GPIO42/PCM2_CE_N
AF5
GPIO43/PCM2_IRQA_N
AF10
TS0_D0
AA8
TS0_D1
Y8
TS0_D2
Y9
TS0_D3
AB7
TS0_D4
AA6
TS0_D5
AB6
TS0_D6
U4
TS0_D7
AC5
TS0_SYNC
AC4
TS0_VLD
AD5
TS0_CLK
AB4
TS1_D0
AB19
TS1_SYNC
AA20
TS1_VLD
AC19
TS1_CLK
AA19
ET_TXD0
C10
ET_TXD1
B11
ET_TX_CLK
A9
ET_RXD0
C11
ET_RXD1
C9
ET_TX_EN
B10
ET_MDC
A10
ET_MDIO
B9
ET_COL
A11
GPIO67
A7
GPIO68
B8
R1611
0
OPT
R1563
22
R1606
4.7K
EEPROM
USB
Serial FLASH MEMORY
for BOOT
for BOOT
I2C
NAND FLASH MEMORY
10 : BOOT 51
11 : BOOT RISC
11 : BOOT RISC
MCU BOOT STRAP
9 14
FLASH/GPIO
ATSC VENUS
/PF_CE0
H : Serial Flash
L : NAND Flash
/PF_CE1
H : 16 bit
L : 8 bit
H : Serial Flash
L : NAND Flash
/PF_CE1
H : 16 bit
L : 8 bit
PM GPIO Assignment Recommended by MStar
ISP Port for MEMC
5V Tolerance
Interrupt for ISP Wake up in STB Mode
08.11.14
POWER DETECT
Stand-by GPIO(SAR[0-3])
D6 D7 E11 B9
I2C for Tuner_5V
JTEG
KIM JONG HYUN
MAX810 : CMOS
NCP810 : Open Drain
/RST
JTCK
JTMS
JTDO
JTINT
JTDI
/JTRST
NO LED NORMAL (L)
MODEL_OPT_3 (B9) : FHD (H) / HD (L)
MODEL_OPT_0 (D6) : LCD (H) / PDP (L)
MODEL_OPT_1 (D7) : FRC (H) / NO FRC (L)
MODEL_OPT_2 (E11) : LED NORMAL (H)
PULL UP is applied on the FRC
PULL UP is applied on the JACK
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