LG 32PC5RVH-MF (CHASSIS:PP78C) Service Manual ▷ View online
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9. In the case of an unusual display in component 1 mode.
Is the video
input of the A/V jack
normal? (Check R235,
R236,R250)
Yes
Change the IC(IC500)
Check the input source.
No
10. In the case of an unusual display in component 2 mode.
Yes
Change the IC(IC500)
Check the input source.
No
Is the video
input of the A/V jack
normal? (Check R243,
R244,R245)
11. In the case of an unusual display in RGB mode.
Yes
Change the IC(IC500)
Check the input source.
No
Is the
R, G, B input
and H, V sync of the JK201 normal?
(Check R223, R224, R225,
R221, R222)
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12. No Sound
(1) Symptom
1) LED is green.
2) There is a picture but no sound.
2) There is a picture but no sound.
(2) Follow check
Is there sound in any
mode?
Is the speaker
on?
Yes
Yes
Is the speaker
cable normal?
cable normal?
Yes
Yes
Is there no sound
only for HDMI?
Yes
Is there no
sound only AV
/COM2/PC?
Is the output
of IC600(R609, R608)
normal?
Yes
Is there no sound
only for RF?
No
No
No
No
Download the EDID data.
Set speaker on
in the menu.
No
Replace the
IC600
No
Check the
Speaker cable
No
Is the IC500
operating normally?
Replace the IC500
No
Yes
Is the IC601
operating normally?
Replace the IC601
Replace the VSC BD
Yes
Check the signal after IC600.
Refer to circuit diagram.
Check the Tuner In/Out.
No
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13. HDMI mode
Is only video
normal?
Is only audio
normal?
No
Yes
Download EDID data each port.
Check the TMDS line wave.
(R312~E3273)
1. Check the HDMI receiver’s status register. (0x60, offset 0x66)
- If the value is 0xf or 0x8, it is normal.
2. Check the HDCP register. (0x6, offset 0x32)
- Enable bit 6 : HDCP key loaded
- Enable bit 5 : HDCP decryption active
- Enable bit 4 : HDCP authentication attempted
- Enable bit 5 : HDCP decryption active
- Enable bit 4 : HDCP authentication attempted
Reset TMDS power down/ on register.
- 0x60, offset 0x3f => 0xff
Check the HDMI source.
Change to another source or cable.
Yes
Is the wave
continuous?
Normal video,
Normal audio?
No
Yes
Replace the IC303.
No
1. Check TV input mode.
(HDMI 1 port support HDMI and DVI.
So if you input DVI signal and PC audio from phone
jack, You can hear PC audio.)
So if you input DVI signal and PC audio from phone
jack, You can hear PC audio.)
2. Unplug and plug in the HDMI cable.
(sometimes an ESD surge occurred at HDMI port.)
3. Check the HDMI Mute register. (0x68, offset 0x37)
4. Check the Audio-out channel mute register (0x68,
4. Check the Audio-out channel mute register (0x68,
offset 0x32) is appropriately enabled.
Yes
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DIAGRAMA EN BLOQUE
PC_Audio
RF
SCART1,2
COMP1
HDMI1
(DTV)
RCA1
RCA2
RGB
(PC)
VARIABLE AUDIO OUT
32PDP BLOCK DIAGRAM
EU-OPTION
COMP2
HDMI2
(DTV)
NONEU-OPTION
VCT_Pro
(Lip-sync)
EEPROM
24C02
SYNC SW
74ACT253
DSUB_SCL/SDA
PC_R/G/B
PC_SER_DATA/CLK
PC_VS/HS
HDMI Rx
ANX9021
#1 RX 0/1/2/CLK
–
CEC
EEPROM
24C02
DDC1_SCL/SDA
EEPROM
24C02
#2 RX 0/1/2/CLK
–
CEC
DDC2_SCL/SDA
VS/HS
DRI/DGI/DBI/[0-7]
PC_R/G/B
CEC
COMP1_Y/Pb/Pr
COMP1_L/R
COMP2_Y/Pb/Pr
COMP2_L/R
SC1_V
SC1_L/R
MNT_VOUT
MNT_L/ROUT
COMP SW
STMAV340
COMP1_Y/Pb/Pr
COMP2_Y/Pb/Pr
SC1_R/G/B
SC_R/G/B_COMP/Y/
Pb
/Pr
AUDIO SW
TEA6420
PC_AUDIO_L/R
SC1_L/
R
SC2_L/
R
COMP2_L/R
AV_AUDIO_L/
R
AM_AUDIO_L/R
COMP1_L/R
TV_L/ROUT
MNT_L/ROUT
MNT_VOUT
TUNER
TV_
V
TV_VOU
T
AM_AUDIO
SIF
SC1_V
SC1_R/G/B/FB/ID
SC1_L/R
TV_VOU
TTV_L/ROUT
SC2_V
SC2_ID
SC2_L/R
MNT_VOUT
MNT_L/ROUT
SC1/2_ID
SC1/2_V
SC1_FB
HDMI_R/G/B
PC_Audio_L/R
HEAD_L/R
EEPROM
24C32
AMP
TPA3107D
2
SPK_L/R
SPK_L-/+
SPK_R-/+
I
2
C
I
2
C
I
2
C
I
2
C
I
2
C
PDP ASIC
4007
RA1/RB1/RC1/RD1/RE+-
I
2
C
DISP_EN
PC_SER_DATA/CLK
FLASH(16 M)
MX29LV160
TEMP IC
ADT75ARZ
XDRV_OUT[0-79]
X1_CLK_A1/2_B1/2
YSUS/ER
_UP/DN
BUFFER
74ACT54
BUFFER
74ACT54
YRAMP_
UP/DN
BUFFER
74ACT54
ZSUS/ER
_UP/DN
YSUS/ER
_UP/DN
YRAMP_
UP/DN
ZSUS/ER
_UP/DN
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