Samsung MH18AP1(P2)-09 - Page 47

Troubleshooting
Samsung Electronics46
6-3-6 When the UP/DOWN louver motor does not operate. (Initial Diagnosis)
1. Checklist :
1) Is input voltage normal?
2) Is the UP/DOWN louver motor properly connected with the connector (CN61)?
2. Troubleshooting procedure
Yes
No
Yes
Check as in the procedure "No Power parts".
Refer to page 41.
Normal
Remove power cord and plug in again in approx. 5 seconds.
Yes
UP/DOWN louver motor is faulty.
Is the operation icon( ) lamp
flickering with the sound of "ting"?
<MH26– ; Doesn't it flicker but come out
the sound of "ting"?>
Does operation start when swing button of the
remote control unit pushed?
No
No
Micom (IC04) is faulty.
Voltage at pin #26~#29 of micom (IC04) change?
(Squarewave)
Yes
No
Driver IC06(ULN2003A) or
IC07(ULN2003A) is faulty.
Voltage at pin #10~#12 of IC06, #16 of IC07(ULN2003A)
change? (Squarewave)
DB98_16045A(4)_1 1/29/04 4:57 PM Page 46