Hdmi Doesn't Display - LG 26LC7C Service Manual

5. HDMI doesn't display

Check input c onnect JK602.
Can you see t he normal wavefo rm?
Check DD C commu nication lines
(IC601 Pin5,6)
Check HD CP communication lines
(IC102 Pin5,6)
Check th e inpu t o f PI3HDMI341ART(IC600)
This signal is TMDS.
Can you see t he normal wavefo rm?
Check th e output of
PI3HDMI341ART(IC600 ).
Can you see t he normal wavefo rm?
Check th e in pu t an d outpu t of BCM3552.
Esp ecially you sh ould ch eck
The H,V sync and c loc k.
Can you see t he normal wavefo rm?
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Only for training and service purposes
YES
YES
YES
YES
YES
NO
JK60 2 may have problem. Replace th is Jack.
NO
Afte r checkin g th e Power of this chip , you
should decide to replace this or not.
NO
Afte r checkin g th e Power of th is ch ip , you
should decide to replace this or not.
NO
After checking th e trace of TMDS lines and po wer of
PI3HDMI341ART, you should decide to replace
PI3HDMI341ART or not .
NO
After ch eckin g th e Power of PI3HDMI341 ART
you should decide to replace PI3HDMI341A
This bo ard has b ig problem becau se Main
YES
chip(BCM3 552) have some trouble s.
Afte r c hecking thoro ugh ly all pa th onc e again,
You sh ou ld decid e to rep lace BCM3 552 or not.
- 16 -
RT or not.
LGE Internal Use Only