Sharp LC-50LE761K Service Manual ▷ View online
25
LC-42/50LE762
LC-42/50LE761
LC-42/50LE760
51
B. CI Module Problem
Problem: CI is not working when CI module inserted.
Possible couses: Supply, suply control pin, detect pins, mechanical positions of pins.
CI supply should be 5V when CI module inserted. If it is not 5V please check
CI_PWR_CTRL, this pin should be low.
Please check mechanical position of CI module. Is it inserted properly or not?
Detect ports should be low. If it is not low please check CI connector pins, CI module
pins.
2. CI Module Problem
26
LC-42/50LE762
LC-42/50LE761
LC-42/50LE760
52
C. Staying in Stand-by Mode
Problem: 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.
27
LC-42/50LE762
LC-42/50LE761
LC-42/50LE760
52
C. Staying in Stand-by Mode
Problem: 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.
53
D. IR Problem
Problem: LED or IR not working
Check LED card supply on MB90 chasis.
3. Staying in Stand by Mode
28
LC-42/50LE762
LC-42/50LE761
LC-42/50LE760
53
D. IR Problem
Problem: LED or IR not working
Check LED card supply on MB90 chasis.
54
E. Keypad Touchpad Problems
Problem: Keypad or Touchpad is not working
Check keypad supply on MB90.
4. IR Problem
Click on the first or last page to see other LC-50LE761K service manuals if exist.