9
No tray open/close
FPC is normally inserted in CN702?
Retest after inserting FPC in CN702 properly
Start
N
Check SW701 pattern and soldering
FPC : Flexible Printed Circuit
Replace SW701
After FPC short check, no error, check SW soldering of deck
FPC of CN702 is normally inserted?
Retest after inserting FPC in CN502 normally
After FPC short check, no error, check SW soldering of deck
FPC of CN702 is normally inserted?
Retest after inserting FPC in CN702 normally
N
N
N
IC301 48pin is 0V at pressing SW701?
Y
IC301 29pin is 0V with tray in?
CN502 16pin
becomes 0V?
CN502 14pin
becomes 0V?
N
N
N
N
IC301 28pin is 0V with tray open?
Check R502,R503,R508, R509 soldering.
CheckIC301,33pin, 34pin soldering.
Check R502,R503,R508 soldering.
CheckIC301,33pin, 34pin soldering.
Replace IC501
Replace IC501
Y
Y
Y
Y
IC501 11pin change from 1.75V to +0V at pressing SW701?
N
N N
N
N
IC301 33pin changes from 1.75V to 5V at pressing SW701?
IC501 13pin changes from +2.4V to +0.7V, and 15pin
from +2.4V to +3.9V, at pressing SW701?
IC501 14pin chages from 2.4V to 3.9V
and 15pin from 2.4V to 0.7V at pressing SW701?
Output Voltage of IC501 13Pin is impressed into
LOADING (-) and IC501 14Pin(+)?
Check pattern and soldering
between CN702 and IC501
Replace loading Motor.
Y
Y
Y
Y
Y
Y
15
OPEN tary repair
CLOSE operation repair
SCR-140(A4)-en 99.3.15 8:39 AM ˘
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9
Summary of Contents for SC-140
Page 2: ... Samsung Electronics Co Ltd MARCH 1999 Printed in Korea Code No BG68 00045A Electronics ...
Page 48: ...8 7 Operational Position Diagram SCR 140 A3 99 3 15 11 19 AM 4 ...
Page 49: ...10 9 Operational Position Diagram SCR 140 A3 99 3 15 9 1 AM 5 ...
Page 50: ...12 Operational Position Diagram 11 SCR 140 A3 99 3 15 9 1 AM 6 ...
Page 51: ...24 23 Circuit Diagram SCR 140 A3 99 3 15 9 0 AM 3 ...