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Samsung Electronics 6-1
6. Troubleshooting
No Disc recognition
LD is outputted
from object lens at
play key input?
No focus incoming and
no disc occurs.
Yes
No
B
A
No focus incoming
FE in SIC1-65
is within specified range?
DRIC4-1, 2 output
are normal?
Check open state from
DRIC4 to pick-up.
Check RIC1 and A, B, C, D input.
Check DRIC4
Yes
Yes
No
No
A
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Troubleshooting
6-2 Samsung Electronics
No pick-up home positing
SLD, SIC1-73
output is normal?
Check the Sled Motor and connection
Check MIC1
Yes
No
LED+, SLED-
SIC4-32, 33 output are
normal?
Check SIC4
Yes
No
NO LD ON
RIC1-28 is 5V?
Current exceeds 0.1A?
LD out pick-up replace.
Open check in related circuit.
Check MIC1
Yes
Yes
Yes
No
No
Divide RQ1 emitter terminal
voltage and 5V real voltage
difference into 10ohm.
B
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Troubleshooting
Samsung Electronics 6-3
No Search Operation
MIRR, SIC1-38
output is nrmal?
Actual velocity occurs
at SIC1-73 terminal?
Actual velocity occurs
at ISC4-32, 33 terminal?
Check RIC1 peripheral circuit.
RFAGCO, RIC1-89
output level is normal?
Check SIC1 peripheral circuit.
Check SIC4 peripheral circuit.
No
No
No
No
Yes
TE occurs in
search range?
Focus On?
Yes
Yes
Yes
A
See "Fine Seek Check"
No
Yes
Check pick-up.
No
FINE SEEK Check
FINE SEEK MIRR
signal (RIC1-57) is missing?
TZCO signal
(SIC1-52) is occurs?
Track incomming is
delayed?
TE is within
2V and 3V?
Pick-up transfer smooth.
Check RIC1 Peripheral curcuit.
Check SIC1 Peripheral curcuit.
Time out due to many jump counts.
Check SIC1 peripheral circuit.
SIC1-76 output
is normal?
SIC4-28, 29
terminal outputs are
normal?
Check DCN1 and pick-up.
Check MECHA.
Check RIC1-36 terminal.
Check SIC4 peripheral circuit.
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
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Troubleshooting
6-4 Samsung Electronics
Abnormal rotation of
disc motor
Input of RF signal
is normal? (SIC1-59)
SPD output is normal?
(SIC1-74)
After resoldering SIC1.
SIC4-2 output (FG)
is normal?
SIC4-9 signal
MON is "H" ?
Check or replace disc motor.
Check DIC1, MIC1.
Check DRIC1 soldering and power.
Check path to RIC1 and SIC1.
Check RIC1 soldering and power.
RIC1-86 output
are normal?
RIC1-88 output
is normal?
Check RIC1 peripheral
circuit and A, B, C, D.
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No Tray open/close
MIC1-84, 85 is
Open ; "L", "L" ?
Close ; "H", "H"?
Check SIC4-35, 36
output at open/close
Check signal line state from
SIC4-35, 36 to tray motor.
Micom (MIC1) error.
Check SIC4.
Yes
Yes
No
No