Samsung Dvd-739 Troubleshooting

Samsung Electronics 7-1

7. Troubleshooting

No Search Operation

PS0, PS1 is input

SIC1-2, 3 terminal from

SIC8-1, 7?

Actual velocity occurs

at SIC1-73 terminal?

Actual velocity occurs

at DRIC2-11, 12 terminal?

Check SIC8 peripheral circuit.

0.1Vp-p sine wave
occurs at search at SIC8-2, 6

terminal?

Replace Hall PCB

Check SIC1 peripheral circuit.

Check DRIC2 peripheral circuit.

No

No

No

No

Yes

TE occurs in

search range?

Focus On?

Yes

Yes

Yes

No

Yes

A

See "Fine Seek Check"

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?

DRIC2-17, 18

terminal outputs are

normal?

Check CN6 and pick-up.

Check MECHA.

Check RIC1-36 terminal.

Check DRIC2 peripheral circuit.

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

No

No

No

No

No

Troubleshooting

7-2 Samsung Electronics

Abnormal rotation of

disc motor

Input of RF signal

is normal? (SIC1-59)

SPD output is normal?

(SIC1-74)

After resoldering SIC1.

DRIC1-24 output (FG)

is normal?

DRIC1-23 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 DRIC2-26, 27

output at open/close

Check signal line state from

DRIC1-26, 27 to tray motor.

Micom (MIC1) erroe.

Check DRIC2

Yes

Yes

No

No

Troubleshooting

Samsung Electronics 7-3

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