Samsung SCR2438 Troubleshooting

9. Troubleshooting

+5V is correctly supplied to CN5003 8~40pin after power cable is plugged in?

Y

X201,X301 is oscillate?

Y

Is 2pin in IC503 HIGH?

Y

INSTALL on?

Y

PICK UP moves on outside circumference and entry inside circumference in sled

at power on ?

Y

Is TRAY IN/OUT?

Y

LASER DIODE ON?

Y

FOCUS UP/DOWN normal?

Y

FOCUS LOCK normal?

Y

DISK rotates?

Y

SPINDLE LOCK normal?

Y

PAUSE mode

		N					Check soldering and power short in
							CN500.
		N					After checking IC201,IC301 power
							input, replace X201,X301 if is not
							defective.
		N
							Check soldering IC503,R523 and
							IC201 108pin
		N					Check power source in IC201.
							Check soldering ICD02, QD02,RD9.
							check soldering IC201,IC301,IC302,IC
			303
		N
							Refer to 'NOSLED Operation
		Y
							Refer to 'TRAYOPEN/CLOSE'
		N
							Refer to 'LASERDIODE ON'
		N
							Refer to 'NOFOCUS LOCK'
		N
		N
							Refer to 'NODISK Rotation'
			N

¡Ø.	PAUSE mode : The state of continue	1 track back jump and LD ON with disk rotating.
¡Ø.	Check soldering and power source at	related IC before troubleshooting.

25	Samsung Electronics

9-1. No Tray Open operation

Start

	Check soldering EJECT S/W		N
	and
	Is the SUB FPC correctly
	inserted	in CN402?
		Y

		When EJECT S/W is pushed,				N
		the 10pin in CN402 turn into
		LOW?
			Y
						N
	When EJECT S/W is pushed,
		solenoid is operating?
			Y
		Check assembling situation of
		BUTTOM CASE
		ASSY in loading system.

Check soldering EJSW01 and retest after FPC correctly insert.

Check soldering CN402 and EJECT S/W if not defective.

5V is generated in

N

IC301 52pin

solenoid?

changes

from 5V

to 0V?

Y

Y

Replace solenoid

Y

Check soldering

IC301

Check soldering Q401,R414,

CN402,CN403,CN405

9-2. No Tray Close Operation

Start

Check assembling situation of BUTTOM CASE ASSY in loading system.

Samsung Electronics

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