Samsung DVD-P355 Operating Instructions

Samsung Electronics 5-1

5. Troubleshooting

No focus incoming

FE in ZIC1-181

is within specified range?

FIC1-27, 28 output

are normal?

Check open state from

FIC1 to pick-up.

Check RIC1 and A, B, C, D input.

Check FIC1.

Yes

Yes

No

No

A

(FE Waveform)

Troubleshooting

5-2 Samsung Electronics

No pick-up home positing

ZIC1-191(SLED-PWM)

output is normal?

(1.7V ~ 1.8V)

Check the Sled Motor and connection.

Check ZIC1.

Yes

No

SLED+, SLED-

FIC1-13, 14 output are

normal?

Check FIC1.

Yes

No

Troubleshooting

Samsung Electronics 5-3

NO LD CD ON

RIC1-22 is 5V?

Current exceeds 0.1A?

LD out pick-up replace.

Open check in related circuit.

Check RIC1

Yes

Yes

Yes

No

No

Divide RQ2 emitter terminal

voltage and 5V real voltage

difference into 10ohm.

Troubleshooting

5-4 Samsung Electronics

No Search Operation

MIRR, RIC1-27

output is normal?

Actual velocity occurs
at ZIC1-191 terminal?

Actual velocity occurs

at FIC1-13, 14 terminal?

Check RIC1 peripheral circuit.

MEVO, RIC1-32

output level is normal?

Check ZIC1 peripheral circuit.

Check FIC1 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

(MIRR Waveform)

(TE Waveform)

Troubleshooting

Samsung Electronics 5-5

FINE SEEK Check

FINE SEEK MIRR

signal (RIC1-27) is missing?

Track incomming is

delayed?

TE is within

2V and 3V?

Pick-up transfer smooth.

Check RIC1 Peripheral curcuit.

Time out due to many jump counts.

Check RIC1 peripheral circuit.

ZIC1-169(TRD)

output is normal?

FIC1-26, 25(T+, T-)
terminal outputs are

normal?

Check DCN1 and pick-up.

Check Deck.

Check RIC1-6 terminal.

Check FIC1 peripheral circuit.

Yes

Yes Yes

Yes

Yes

Yes

No

No

No

No

No

No

(TE Waveform)

(TRD Waveform)

(T+,T- Waveform)