Zenith C32V23 - 32" Flat-Screen Integrated HDTV, Service Manual

Page: 42 / 81

PV154 - 923-03497
3-20
AB - SERVICING
SERVICING
Remote does not work properly (micro section)
Check if Keyboard works
properly
Yes No
Check if the IR is the cause of the problem by
replacing the entire Keyboard module
Yes No
Check if I2C bus (SDA at pin 42
SCLA at pin 45 IC6000) is ok
The problem is the IR or other
of the components in the
Keyboard module.
Yes No
Check I2C Communication Bus Replace DTV Board
Keboard works ok
TV can not be operated
even with the Keyboard
Reset Microcontroller and
try again
Analog CC / Analog Rating are not displayed (micro section)
If Possible, use an Analog CC
generator to make sure CC service
is provided. Also make sure you are
checking Analog CC in the proper
Source.
Check presence of Video signal input at the
Micro (CVIN at pin 28 of IC6000)
Yes No
Check JM6000, C6032,
RM6035, RM6097 CM6031
Check there is Analog OSD
(procedure was described
above)
Yes No
Add missing components Check Y/CV Micro signal from Q2910
Also check RM2990, W2903, and
W2904 which are required to have CV
signal from A/V Switch CXA2069
(ICM2900 at pins 53 and 56)