Samsung DVD-808 Troubleshooting

Samsung Electronics

8-1

No Search operation

FG is input

uCOM from SIC2

19 terminal?

Reference velocity

signal occurs at SIC2 16

terminal?

Actual velocity occurs

at SIC2 18 terminal?

SLEDGS terminal

is ‘L’ (During

search term)?

Replace uCOM program

(MIC2)

Check SIC2 peripheral circuit

1.5Vpp sine

wave occurs at search at

SIC2 3, 21 terminal?

Replace Hall PCB

Check SIC2 peripheral circuit

Check SLEDGS terminal of

uCOM. Check peripheral circuit.

No

No

No

No

Yes

Yes

Yes

Yes

Yes

No

8. Troubleshooting

8-1. SERVO Thoubles

A

Troubleshooting

8-2

Samsung Electronics

No

No

Yes

No

Yes

Yes

Yes

TE occurs in

search range?

Focus On?

After SLEDGS

terminal is changed from

‘L’to ‘H’, track input is

OK(within several ms)?

FINE SEEK RFRF

signal is missing?

RFCT follows

center level of RFRF?

Track incoming is

delayed?

FINE SEEK check

Check RIC1 peripheral circuit

Check PR11 peripheral circuit

Time Out due to many

jump counts

Check SIC2 peripheral

soldering

Yes

Yes

No

No

No

A

C

B

Troubleshooting

Samsung Electronics 8-3

No

No

No

No

No

No

No

Yes

Yes

Yes

Yes

Yes

Yes

TE is within 2V

and 3V?

SIC7 49 output

is normal?

SIC4 11, 12

terminal outputs are

normal?

Check CN1

and Pick-up

For CD, check RR34,

RR36A peripheral circuit

For DVD, check RR45

peripheral circuit

Check SIC4

peripheral circuit

SLED linked loop check

SIC7 53 FMO

occurs?

SIC4 14 ouput is

normal?

SIC4 17,

18 terminal outputs are

normal?

Pick-up transfer is smooth.

Check SIC4 soldering and

power

Check SQ1 peripheral circuit

and SLEDGS terminal

Check SIC7 53

peripheral circuit

SLEDGS

terminal is ‘L’?

Yes

B

Troubleshooting

8-4

Samsung Electronics

No

No

No

No

No

No

Yes

Yes

Yes

Yes

Yes

Abnormal rotation

of disc motor

RIC3 Pin 6

output is normal?

RIC1 Pin 42

(for CD) or 43(for DVD)

output are normal?

Check path to SIC7

and DIC1

Check SIC6

soldering and power

Check SIC5 soldering and

power or Replace SIC5

Check RIC1

soldering and power

Check RIC3 peripheral

circuit and A, B, C, D

Input of RF

signal is normal?

For CD, SIC7 38 terminal.

For DVD, DIC1 Pin 50

DMO

output is normal?

For CD, SIC7 55 terminal.

For DVD. DIC1 Pin 54

SIC6 Pin 1

output is normal?

SIC5 Pin22

signal is normal?

Check or replace disc motor

After resoldering

SIC7, DIC1,

unchanged,

replace IC.

Troubleshooting

Samsung Electronics 8-5

No

Yes

No

Yes

Yes

No tray open/close

MIC1 Pin84, 85 is

OPEN:L.L?

CLOSE:H.H

Check SIC4 Pin26, 27

ouput at open/close

Signal is

reverse output

(based on SR24,25)?

Check signal line state

from SIC4 Pin26, 27

to tray motor

Check SR24, 25
peripheral circuit

Micom error

Troubleshooting

8-6

Samsung Electronics

No

Yes

No disc recognition

LD is outputted from object

lens at play key input?

No disc focus incoming

and

no disc occurs

D

C

Troubleshooting

Samsung Electronics 8-7

Yes

No

No

Yes

No focus incoming

Check SIC4

Check RR26, RR26A, RR28

value and A, B, C, D input

Check open state

from SIC4 to Pick-up

FES in SIC7

43(TP39) is within

specified range?

SIC4 1,2

outputs are normal?

C

Troubleshooting

8-8

Samsung Electronics

No PICK-UP

Home positioning

Micom error

Check SIC2, SIC9

signal transfer system

MIC1 8

Output is normal?

SELED FG(MIC1 9) is

input normally

Check SIC4

soldering and power

Yes

Yes

No

No