Remote Control Does Not Work; Keys Do Not Work - LG BP340 Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE

4. REMOTE CONTROL DOES NOT WORK

Remote control does not work.
Whether remocon's battery
is exhausted or not?
Whether IR receiver power is OK?
IR1's pin1, pin3 are about 5 V.
Replace main board.

5. KEYS DO NOT WORK

Power key & open/close key do not work.
Whether 3.3 V on front board
XP1 pin9 & pin10 are OK?
Whether key1 & key2
are OK?
Replace main board.
YES
YES
YES
YES
YES
YES
NO
Replace battery for remote controller.
NO
NO
Fix the connection XP1 on front board
to XP1 on main board.
NO
Replace key1 or key2.
3-7
Replace IR1.