Goldstar FFH-S197AX, FFH-S198AX Schematic

SECTION 2. ELECTRICAL

TROUBLESHOOTING

Turn power on.

	NO		Check power supply circuit.
Is power on?			PN508 PIN 8,	6.2V
			PN508 PIN 7,	5V
			IC503 PIN 2, 3.3V

YES

	NO						NO
Does initial read work?			Check the DISK turns						Check the connector
									PN503, PN504, PN507
				YES
YES			Check the Laser							YES
				YES
			Check the focus circuit
				YES
			Check the TRAKING circuit
Does it play?			NO
						Check the tracking servo circuit.
YES

Does it output audio?	NO
	Check the PN508 PIN1, 3
YES
OK

- 2-1 -

Fails to initial read

NO

Disc motor turns

YES

Does RF waveform appear?

NO

IC501 Pin4

Check the Voltage change of PN 507 pin2(OPEN, CLOSE)

YES

Check the Data transmission from

PN507 pin8 to CD DSP

5V

0V

YES

Check the Data transmission from PN507 pin6 to MICOM

5V

0V

YES

	Check the change of SLDO								2V
	Voltage(IC501 pin23)								1V
									0V
	YES
YES	Check the change of SL +,							1.2V
	SL - Voltage							0V
	(IC502 pin 18, 19)
								0.8V

	NO	Defective connector
		PN507

	NO	Defective connector
		PN507 Defective
		MICOM

	Defective connector
NO	PN507 Defective
	IC501

NO	Defective IC501

NO	Defective IC502

			YES
							Defective contact PN503
							Defective PICK-UP
Does laser light?					A

YES

Does FA+ waveform appear at

IC502 pin13?

focus coil drive wareform.

YES

Does TE waveform appear at

501 pin 15?

TRACKING ERROR wareform

YES

Is rotation normal?

YES

Is there no dropout of RF signal?

B

NO

	Defective IC501
YES	Defective PICK-UP

- 2-2 -

Laser does not light.

Is “5V” applied to pin

66 of IC 501?

YES

NO

NO

NO

Did pickup return to

Is data transferred from

Defective MICOM.

innermost circular?

MICOM IC ?

YES

YES

Does voltage appear at IC

NO

502 pin 18 , 19 ?

Defective IC 501, 502

YES		Defective slide motor and/or
		connector.

Does it stop at inner pick

Is defect output from LM

circular after shift?

SW applied to pin 3

of

YES

PN503?

NO

Defective LMT SW and/or

connector.

OPEN

CLOSE

YES

Defective MICOM.

YES

NO

Is power supplied to laser Q501?

Defective connector.

(Q 501 collector: about 1.8V)

R508 »1.0V

YES

Defective Q 501 and/or laser.

YES

Does laser current flow?

YES

R508 «1.0V

Defective laser and/or

1.0V across R508

connector.

- 2-3 -

B	Laser lights
				NO				NO
	Does lens move up/down?									Defective IC501
						Check the signal of
						FOCUS SEARCH
		YES				(IC501 Pin 21)
						YES
								NO
										Defective IC502
						Chekc the signal of PN502
						pin 13, 14
										Open activator and/or connector
						YES

Does FE signal appear?		NO
(IC501 pin 13)					Defective IC501
	YES
		NO
Does DRF signal appear? (IC 501 pin67)					Degraded laser diode
					Defective PICK-UP

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