Samsung DVD-811, DVD-711 Troubleshooting

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

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

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

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