Sony MDS-SD1 service manual Selecting The Test Mode

4-5. SELECTING THE TEST MODE

There are 31 types of test modes as shown below. The groups can be switched by rotating the –˜+ knob. After selecting the group to be used, press the ENTER/YES button. After setting a certain group, rotating the –˜+ knob switches between these modes.

Refer to “Group” in the table for details selected.

All items used for servicing can be treated using group S. So be carefully not to enter other groups by mistake.

Display	Contents	Mark		Group (*)
TEMP CHECK	Temperature compensation offset check		C		S
LDPWR CHECK	Laser power check		C		S
EF MO CHECK	Traverse (MO) check		C		S
EF CD CHECK	Traverse (CD) check		C		S
FBIAS CHECK	Focus bias check		C		S
S curve CHECK	S letter check	(X)	C
VERIFY MODE	Non-volatile memory check	(X)	C
DETRK CHECK	Detrack check	(X)	C
TEMP ADJUST	Temperature compensation offset adjustment			A	S
LDPWR ADJUST	Laser power adjustment			A	S
EF MO ADJUST	Traverse (MO) adjustment			A	S
EF CD ADJUST	Traverse (CD) adjustment			A	S
FBIAS ADJUST	Focus bias adjustment			A	S
EEP MODE	Non-volatile memory control	(X) (!)				D
MANUAL CMD	Command transmission	(X)				D
SVDATA READ	Status display	(X)				D
ERR DP MODE	Error history display, clear				S
SLES MOVE	Sled check	(X)				D
ACCESS MODE	Access check	(X)				D
0920 CHECK	Outermost circumference check	(X)				D
HEAD ADJUST	Head position check	(X)				D
CPLAY2 MODE	Same functions as CPLAY MODE	(X)				D
CREC2 MODE	Same functions as CREC MODE	(X)				D
ADJ CLEAR	Initialization of non-volatile memory of adjustment value			A	S
AG Set (MO)	Auto gain output level adjustment (MO)			A	S
AG Set (CD)	Auto gain output level adjustment (CD)			A	S
Iop Read	IOP data display		C		S
Iop Write	IOP data write			A	S
INFOMATION	Microprocessing version display		C		S
CPLAY MODE	Continuous play mode		C	A	S	D
CREC MODE	Continuous recording mode		C	A	S	D

Group (*)
C: Check	A: Adjust
S: Service	D: Develop

• For details of each adjustment mode, refer to “5. Electrical Adjustments”.

For details of “ERR DP MODE”, refer to “Self-Diagnosis Function” on page 2.

•If a different mode has been selected by mistake, press the MENU/NO button to exit that mode.

•Modes with (X) in the Mark column are not used for servicing and therefore are not described in detail. If these modes are set accidentally, press the MENU/NO button to exit the mode immediately. Be especially careful not to set the modes with (!) as they will overwrite the non-volatile memory and reset it, and as a result, the unit will not operate normally.

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