Philips LC9.2A Service Manual page 21

5.6.8 Trouble Shooting HDMI section
Service Modes, Error Codes, and Fault Finding
No Video and Audio
for any HDMI input
(permanently)
Check TMDS signal at pin 1,
3, 4, 6, 7, 9, 10, 12 of
connector 1 (if HDMI 1)
Yes
Check TMDS signal at pin
37,38,41,42,44,45,47,48 of
ADV3002 (if HDMI 1)
Yes
Check TMDS signal at pin
25,26,28,29,31,32,34,35 of
ADV3002
Yes
The video and audio path is
intact, no video & audio is
cause by MTK 5392
malfunction
No Video and Audio for any
HDMI input
(Intermittent and differ
within various DVD player)
Go to CSM mode using RC
key "123654",
check item 11: Key(HDCP)
Valid
check item 19:
EDID Version / Check sum
As per latest?
Yes
Check the following possible hardware failure:
1) Supply of EEPROM IC (pin 8 of 7B02). Should be +5V.
2) Connectivity of I2C between EEPROM (7B02) and ADV3002
(7B05). Between pin 5, 6 of 7B02 and pin 61 , 62 of 7B05.
Should be +3.8V.
3) Connectivity of DDC line between HDMI connector and
ADV3002. (ex: pin 15, 16 of connector HDMI 1 to pin 69 , 70 of
ADV3002.)
4) Connectivity of DDC line between ADV3002 and MTK5392.
(pin 67, 68 of ADV3002 to test point F836 & F837)
Figure 5-9 Fault finding tree HDMI section
LC9.2A LA
Malfuntion of HDMI
No
connector, ensure
solderbility of Connector
Malfuntion of PCB trace,
No
ensure no broken trace of
these signals between
connector and ADV3002
No
Malfuntion of ADV3002
Invalid
Reload HDCP key
No
Update EDID
5. EN 21
18490_211_090409.eps
090409
2010-Jul-01