Samsung RS2544 Service Manual page 56

Diagnostics
11-10) If the solenoid in the ice-chute cover doesn't work :
Preliminary check
1) Check if the solenoid is unconditionally operated for 0.3 sec, independent of the Open/Close condition of cover ice-route, after
a lapse of about 5 seconds from power ON. (Before installation, the cancellation of cover ice-route open is enabled.)
2) Check if the connector in upper hinge section is hook-up correctly.
The S/N control PCB assembly and
wire system have no trouble.
Press Ice lever and keep it open.
YES
Is the cover closed of
S/N after about
7∼10 seconds?
YES
All the control system of cover ice-
route has no trouble.
Check the ICE S/W, and troubleshoot
the wire connection syste
YES
0.3 sec operated after 5 seconds
PCB maintaining High for 0.3 sec at the first
NO
Exchange the main PCB assembly.
NO
After replace TR Q701 and check SSR71 then
exchange the failed components or replace the
PCB assembly.
With the ice S/W ON
and ICE S/W on, ice-movement motor in F room?
NO
m.
Start
Is the S/N(solenoid) for
from power ON?
NO
YES
Is MICOM No. 27 on
power ON?
NO
NO
Check the stop lever and support
time-delay.
YES
Subject to the ice
S/W ON, do CN31 No. 2 and MICOM No. 45
get impressed 0V?
- Main PCB and the sensing section of
ice-S/W are normal.
- Check the operation of SSR71 and
Q701.
56
MICOM control port is normal.
Does C-E(between C and E)
of TR Q701 turn ON for 0.3 sec?
YES
TR701 and SSR71 are normal
YES