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SCR-140(A4)-en 99.3.15 8:39 AM ˘ ` 9
IC301 48pin is 0V at pressing SW701?
IC301 33pin changes from 1.75V to 5V 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
No tray open/close
Start
FPC is normally inserted in CN702?
Y
Y
IC301 29pin is 0V with tray in?
Y
IC301 28pin is 0V with tray open?
Y
OPEN tary repair
Y
Check R502,R503,R508, R509 soldering.
CheckIC301,33pin, 34pin soldering.
Y
Replace IC501
LOADING (-) and IC501 14Pin(+)?
Y
Check pattern and soldering
between CN702 and IC501
Replace loading Motor.
FPC : Flexible Printed Circuit
N
Retest after inserting FPC in CN702 properly
N
N
CN502 16pin
becomes 0V?
N
CN502 14pin
becomes 0V?
IC501 11pin change from 1.75V to +0V at pressing SW701?
N
IC501 13pin changes from +2.4V to +0.7V, and 15pin
from +2.4V to +3.9V, at pressing SW701?
N
N
15
9
Check SW701 pattern and soldering
Replace SW701
After FPC short check, no error, check SW soldering of deck
Y
N
FPC of CN702 is normally inserted?
N
Retest after inserting FPC in CN502 normally
N
After FPC short check, no error, check SW soldering of deck
Y
FPC of CN702 is normally inserted?
N
Retest after inserting FPC in CN702 normally
CLOSE operation repair
Y
Check R502,R503,R508 soldering.
CheckIC301,33pin, 34pin soldering.
Y
Replace IC501
N
N
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