Sharp LC-22DV240K Service Manual / Parts Guide ▷ View online
57
LC-22DV240
LC-22DS240
LC-22DS240
Please check mechanical positions of CI module.
Detect ports should be low. If it is not low please check CI connector pins, CI module pins
and 3V3_VCC on MB62.
and 3V3_VCC on MB62.
58
LC-22DV240
LC-22DS240
LC-22DS240
21.3. Led Blinking Problem
Problem: LED blinking, 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.
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.
59
LC-22DV240
LC-22DS240
LC-22DS240
21.4. IR Problem
Problem: LED or IR not working
Check LED card supply on MB62 chasis.
Check LED card supply on MB62 chasis.
60
LC-22DV240
LC-22DS240
LC-22DS240
21.5. Keypad Touchpad Problems
Problem: Keypad or Touchpad is not working
Check keypad supply and KEYBOARD pin on MB62.
21.6. USB Problems
Problem: USB is not working or no USB Detection.
Check USB Supply, It should be nearly 5V.
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