Samsung sd608 Troubleshooting
3-9Samsung Electronics
3-3 Trouble shooting
A
Check CN501-2 +5V, +12V
after power cable connection
Y
N
N
N
N
N
N
N
N
Y
Y
Y
Y
Y
Y
Y
X501, X301, X201
oscillate ?
IC301 19 pin change from
0V to 5V?
Check power short, power supply
IC501, IC301, IC201 power input are
normal, replace X501, X301, X201
IC310 4,5pin change from
0v to 5v
IC301 power input
See ÔSLED operation errorÕ
See ÔNo TRAY open/closeÕ
See ÔNo Laser diode onÕ
See ÔSERVO operation errorÕ
IC201 pin change
from 0V to 5V?
PICK-UP moves in at
power on after moving out?
Tray open/close run?
Laser diode is on?
Focus up/down run?
Power and initial state check
(Check after connecting only power cable without IF cable connection)
41 44
40
3-10 Samsung Electronics
A
Focus lock runs?
(IC201 pin "0VÓ)
Disc rotates?
Temporary stop state?
(TE signal check)
See 'SERVO operation error'
See 'Disc rotation error'
See 'SERVO operation error'
<TE signal at track jump)
( Temporary halt state )
Y
Y
Y
N
N
N
2V 2.1V...
<For DVD>
38
Samsung Electronics 3-11
No tray open/close
Pin between SW701 and R311
0V at pressing SW701?
Check the slodering of SW701
Check pattern disconnection from
R311 to IC301 41pin
Check the slodering of
SW702 and pattern
Check the slodering of
SW702 and pattern
Check the soldering of R405, R410,
R409,R404,R427and If still not
operated, replace IC401
Check the pattern, power of short
and wire disconnection state
0V signal is inputted into IC301
41 pin at pressing SW701?
0V, 5V switching signal of SW702
1pin is inputted into IC301 39pin?
0V, 5V switching signal of SW702
3pin is inputted into IC301 40pin?
Approx. ±2V DC voltage come from
IC401 14,15pin on the basis of 2.1V
at pressing Open/Close key?
Connection between IC401 14,15pin and
SW702 and loading motor is normal?
Open/close runs normally.
N
N
N
N
N
N
Y
Y
Y
Y
Y
Y
3-12 Samsung Electronics
No laser diode on
Focus up/down runs?
Power and GND terminal of
IC101 are normal?
(5V : 21,27,46,52,65,71pin
OV:1,55,66,76 pin)
IC101 60pin is about 2.9 V?
Voltage difference of R103
is approx. 800mV?
IC101 59 pin voltage is
approx. 20mV?
Replace Pick-up.
Check power and initial state
Check power and GND pattem
Check the soldering of R106
Check the soldering of R103,Q101,L102
Check the soldering of CN101
N
N
N
N
N
Y
Y
Y
Y
Y
<For CD family>
<For DVD>
Samsung Electronics 3-13
N
Y
Y
Y
Y
N
N
N
Power and GND terminal
IC101 are normal?
IC101 3pin is about 2.8 V?
Voltage difference between both
stages of R116 is approx. 800mV?
IC101 3 pin voltage is
approx. 20mV?
Replace Pick-up.
Check power pattern connection
Check the soldering of R115
Check the soldering of R116, Q102, L103
Check the soldering of R101
Loading...