LG Electronics GSA-4168B Detail Error Code & Fail Analysis 1. Laser Power Initial Adjust

Detail Error Code & Fail Analysis

1. Laser Power Initial Adjust

No.	Error Code	Contents of fail	Fail Analysis		Block Diagram
	SSB Byte8,9
1	28xx	LP Adjust NG.	1)	Check Pickup FFC Connection.	No.01
	(Exchange		2)	Check solder of IC101circumference.
	low/high byte)			(pin#6, 10, 12, L150, L151)
	Byte8: xxh		3)	Check solder of IC102.
			4)	Exchange Pickup(LDD, Front Monitor).
	Byte9: 28h
			5)	Exchange IC101(AFE).
			6) Exchange IC301(MPU & DSP).
2	48xx	High Frequency Adjust NG.	1)	Check Pickup FFC Connection.	No.02
			2)	Exchange Pickup (LDD part).
			3)	Exchange IC301(DSP).
3	5Exx	NRZi Skew Adjust NG.	1)	Check Pickup FFC Connection	No.02
			2)	Exchange Pickup (LDD part).
			3) Exchange IC301(MPU & DSP).
4	4C0x to 4C4x	Data Slice Adjust NG.	1)	Check solder of IC101circumference.	No.03
				(pin# 79, L150, L151)
			2)	Exchange IC101(AFE).
			3) Exchange IC301(MPU & DSP).
5	4C5x to 4C7x	EQ Boost Adjust NG.	1)	Check solder of IC101circumference.
				(pin# 79, L150, L151)
			2)	Exchange IC101(AFE).
			3) Exchange IC301(MPU & DSP).
6	4C80	RAW Slice Level Adjust NG.	1)	Check solder of IC101circumference.
				(pin# 79, L150, L151)
			2)	Exchange IC101(AFE).
			3) Exchange IC301(MPU & DSP).
7	4CAx	EQ Auto Frequency Adjust NG.	1)	Check solder of IC101circumference.
				(pin# 79, L150, L151)
			2)	Exchange IC101(AFE).
			3) Exchange IC301(MPU & DSP).

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