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7. Abnormal screen (HDMI)-Main PCBA
Abnormal screen (HDMI)
1
Put into HDMI
cable completely?
2
Is Input signal timing
and format in spec?
3
Can read EDID and
HDCP key though
16,15pin of JK203
4
Is 5V at 19pin of JK203?
5
Is waveform at 10,12pin
of JK203?
6
Is waveform at 1,3,4,6,7,9pin
Of JK203?
Change IC501
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LG Electronics. Inc. All right reserved.
Only for training and service purposes
NO
YES
NO
YES
YES
YES
NO
YES
NO
YES
insulted HDMI cable
Change Timing according to
product spec, change f ormat
under 8 bit in Ycbcr, Ypbpr, RGB
Check Line between JK203 and IC501
is open or short, Another is
Change HDMI cable
Check Line between JK203 and IC501
is open or short, Another is
Change IC501 or HDMI cable
Check Line between JK203 and IC501
is open or short, Another is
Change HDMI cable
Check Line between JK203 and IC501
is open or short, Another is
- 19 -
Change HDMI cable
LGE Internal Use Only
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