Panasonic DMR-UBS80EG, Service Manual

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(3) Main P.C.B. IC communication (e.g. EEPROM)
Digital P.C.B. IC communication (e.g. Ether)
< Diagnosis Result >
Example: Communication error between Ether-LSI and CPU
5. HDMI (SUB) Diagnosis (DMR-UBS90EG)
< Diagnosis Result >
0 No trouble found.
2 Communication error between the EEPROM of Main P.C.B. and IC.
Check the connection between digital P.C.B. and Main P.C.B.
If no trouble found, malfunction on the Main P.C.B. is suspected.
4 Communication error between CPU and ETHER-LSI.
There is a high possibility of parts failure on the digital P.C.B.
6 Communication error between CPU and EEPROM of Main P.C.B., and CPU and ETHER-LSI.
Take measures of above "2" and "4".
Other Try to run self diagnosis again.
0 No trouble found on the digital P.C.B.
2 Communication error between CPU and HDMI-LSI,
There is a high possibility of parts failure on the digital P.C.B.
Other Try to run self diagnosis again.