Sony MDS-SP55 Service Manual page 19

4-5. SELECTING THE TEST MODE
There are 31 types of test modes as shown below. The groups can be switched by rotating the l L knob (MD). After selecting the
group to be used, press the ENTER/YES button (MD). After setting a certain group, rotating the l L knob (MD) 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
MD TEMP CHECK
Temperature compensation offset check
MD LDPWR CHECK Laser power check
MD EF MO CHECK
Traverse (MO) check
MD EF CD CHECK
Traverse (CD) check
MD FBIAS CHECK Focus bias check
MD S curve CHECK
S letter check
MD VERIFY MODE
Non-volatile memory check
MD DETRK CHECK Detrack check
MD TEMP ADJUST
Temperature compensation offset adjustment
MD LDPWR ADJUST
Laser power adjustment
MD EF MO ADJUST Traverse (MO) adjustment
MD EF CD ADJUST
Traverse (CD) adjustment
MD FBIAS ADJUST
Focus bias adjustment
MD EEP MODE Non-volatile memory control
MD MANUAL CMD
Command transmission
MD SVDATA READ
Status display
MD ERR DP MODE Error history display, clear
MD SLED MOVE
Sled check
MD ACCESS MODE
Access check
MD 0920 CHECK Outermost circumference check
MD HEAD ADJUST
Head position check
MD CPLAY2 MODE
Same functions as CPLAY MODE
MD CREC2 MODE Same functions as CREC MODE
MD ADJ CLEAR
Initialization of non-volatile memory of adjustment value
MD AG Set (MO)
Auto gain output level adjustment (MO)
MD AG Set (CD) Auto gain output level adjustment (CD)
MD Iop Read
IOP data display
MD Iop Write
IOP data write
MD INFORMATION Microprocessing version display
MD CPLAY MODE
Continuous play mode
MD CREC MODE
Continuous recording mode
• 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 (MD) 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 (MD) 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.
Contents Mark Group ( )
*
C S
C
S
C S
C S
C S
(X) C
(X) C
(X) C
A S
A S
A S
A S
A S
(X) (!) D
(X) D
(X) D
S
(X) D
(X) D
(X) D
(X) D
(X) D
(X) D
A S
A S
A S
C S
A S
C S
C A S D
C A S D
Group ( * )
A: Adjust
C: Check
D: Develop
S: Service
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