LG 37LP1DA-ZA (CHASSIS:ML-03JA) Service Manual ▷ View online
- 22 -
No image
Attach the input cable(s)
Push the POWER ON key
Is theSet ON?
Is the input cable
attached?
HDMI / DVI DTV
Replace IC accordingly
Correct them
What is
the input signal
mode?
Check the
Corresponding EDID
Storage memory (I.e.,
IC202 for DVI and
IC203 for HDMI)
Check the
Condition of all
Connectors, wafers, I2C
In corresponding
Signal flow
Power
Error
Replace IC1 AN15865
To sheet 25
Yes
Yes
Yes
FAIL
FAIL
FAIL
PASS
PASS
PASS
PASS
PASS
FAIL
FAIL
Check the interfacing ckt
Of corresponding mode
On jack board
NO
Check the
input TMDS signal
at pins 39-52 for
DVI and 58-71 for
HDMI of IC601
SiI9021
Check 24
Bit RGB output
Across AR 601-606
Check 3.3V at
L601-605 and
1.8V at pin 2 of
IC602
- 23 -
No image
Attach input cable or
memory card
Push the POWER ON key
Is the Set ON?
Is the input cable
attached?
DVI PC / X-Studio
Check the interfacing
circuit At the jack
board or replace X-studio
Board accordingly
Correct them
What is
the input signal
mode?
Check the
i/p RGB/HV signal
At the pin no.72-76 for
X-studio and 1-2,78-80
For PC, of
AN15865
Check the
Condition of all
Connectors,wafers,I2C
and slots In corres
Ponding Signal
flow
Power
Error
Replace IC1 AN15865
To sheet 24
Yes
NO
Yes
FAIL
PASS
FAIL
FAIL
PASS
PASS
PASS
FAIL
NO
Check the
output YUV at
R 418, 415, 412
respectively
Check 9V
Across L401and
5V across L404
and L402
- 24 -
Check the
24 bit RGB signal
output of ADC(X98014)
across RA500-501
Check the
3.3V supply volt
across L503, L504
And clock frequency
at pin 39,40
of ADC
From sheet 23
From sheet 20
To sheet 25
(DVI PC / X-Studio)
To sheet 25
(component)
Power
Error
Replace ADC
PASS
PASS
PASS
FAIL
FAIL
- 25 -
check the
output of VSP at.
10,15,16,18,20,21,22
30,31,32 pin
Check the
supply Vcc 3.3V
across L6,7 and 1.8V at pin 2
of IC11,12 and crystal
Frequency at
Pin 69,70
Check the
output of Froudja.
at pin 148-155,130-137 for
Y/C signal and clk,
VS,Hs at RF21-23
check the
RGB output of
PW181 across RAS
10-15 and sync and clk
Signal across RS
45-48
check the
supply 3.3V at LS
4, 2.5V at LS3 and 1.5V
at LS6 and LS9 and
Crystal freq
Check the
IEP output across
RAIP 1-6 and RIP
1,3,4,6
Check LVDS
output for PiP at pin
37,41,45,47 & for main image
at pin 48,46,42,38 of
IC902(LVDS IC).
check 3.3Vdd
and 2.5Vdd across
respectively
LIP2 and LIP1
check the
3.3Vdd across
CF12 and 1.8Vdd
across CF27,CF33 and 13.5
MHz at pin 191-192
of Froudja
Replace
Froudja
Replace
PW181
Power Error
Power Error
Replace LVDS
Replace IEP
Crystal or Power
Error
Replace VSP9437B
Crystal or Power Error
Crystal or Power Error
Check Power Levels and do
Power Troubleshooting
From sheet 24
(component)
From sheet 20
(S-Video)
From sheet 26
From sheet 21
From sheet 22
From sheet 24
(DVI PC / X-Studio)
Check
Vcc_PLL 3.3V
Across L901
PASS
FAIL
PASS
FAIL
FAIL
PASS
PASS
PASS
FAIL
FAIL
PASS
PASS
FAIL
PASS
FAIL
FAIL
PASS
PASS
FAIL
FAIL
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