Samsung CKB5237L Service Manual page 39

6 Troubleshooting
6-11 User Controls Don't Work
Does the DC level change at Pins
No
Check the button
13 and 14 of IC201 when you push
(SW201 ~ SW203)
the Main PCB?
Yes
Check IC201, IC202 and
RESET circuit.
CKB5237L/7227L 6-9