Staying In Stand-By Mode Problem; Ir Problem; Keypad Touchpad Problems - Sharp LC-22LE250E-V Service Manual

LC-22LE250
LC-24LE250
C. Staying in Stand-by Mode
Staying in stand-by mode,no other operation.
This problem indicates a short on Vcc voltages. Protect pin should be logic high while normal
operation. When there is a short circuit protect pin will be logic low. If you detect logic low
on protect pin, unplug the TV set and control voltage points with a multimeter to find the shorted
voltage to ground.
D. IR Problem
Problem: LED or IR not working.
Check LED card supply on MB95 chasis.
E. Keypad Touchpad Problems
Problem: Keypad or Touchpad is not working.
Check keypad supply on MB95.
Problem:
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