Sony MDS-JE520 Service Manual page 31

4-5. SELECTING THE TEST MODE
There are 31 types of test modes as shown below. The groups can be switched by rotating the AMS knob. After selecting the group to be
used, press the YES button. After setting a certain group, rotating the AMS 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.
No
Display
TEMP CHECK C01
LDPWR CHECK C02
C03
EF MO CHECK
C04
EF CD CHECK
C05
FBIAS CHECK
S curve CHECK C06
C07
VERIFY MODE
C08
DETRK CHECK
TEMP ADJUS C09
C10
LDPWR ADJUS
EF MO ADJUS C11
C12
EF CD ADJUS
FBIAS ADJUS C13
C14
EEP MODE
C15
MANUAL CMD
SVDATA READ C16
C17
ERR DP MODE
C18
SLES MOVE
C19
ACCESS MODE
0920 CHECK C20
HEAD ADJUST C21
C22
CPLAY2 MODE
C23
CREC2 MODE
C24
ADJ CLEAR
C25
AG Set (MO)
AG Set (CD) C26
C27
Iop Read
C28
Iop Write
C29
JE520 @@.@@
C30
CPLAY MODE
CREC MODE C31
• 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.
Contents
Temperature compensation offset check
Laser power check
Traverse (MO) check
Traverse (CD) check
Focus bias check
S letter check
Non-volatile memory check
Detrack check
Temperature compensation offset adjustment
Laser power adjustment
Traverse (MO) adjustment
Traverse (CD) adjustment
Focus bias adjustment
Non-volatile memory control
Command transmission
Status display
Error history display, clear
Sled check
Access check
Outermost circumference check
Head position check
Same functions as CPLAY MODE
Same functions as CREC MODE
Initialization of non-volatile memory of adjustment value
Auto gain output level adjustment (MO)
Auto gain output level adjustment (CD)
IOP data display
IOP data write
Microprocessing version display
Continuous play mode
Continuous recording mode
– 31 –
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
S: Service D: Develop