Sony MDS-JB940 Service Manual page 18

4-5. SELECTING THE TEST MODE
There are 25 types of test mode as shown below. The groups can be switched by turning the l AMS L knob.
All of the service adjustments and checks can be performed in the test modes of Service group.
There is also the Develop group, but it is not used for service. If the Develop group is set by mistake, immediately press the MENU/NO
button to release the group.
Display No.
AUTO CHECK C01 Auto self-diagnosis
Err Display C02 Error history display/delete
TEMP ADJUS C03 Temperature compensation offset adjustment
LDPWR ADJUS C04 Laser power adjustment
Iop Write C05 IOP data writing
Iop NV Save C06 The current IOP value is read by the microprocessor and written into non-
volatile memory.
EF MO ADJUS C07 Traverse (MO) check
EF CD ADJUS C08 Traverse (CD) check
FBIAS ADJUS C09 Focus bias adjustment
AG Set (MO) C10 Focus tracking gain adjustment (MO)
AG Set (CD) C11 Focus tracking gain adjustment (CD)
TEMP CHECK C12 Temperature compensation offset check
LDPWR CHECK C13 Laser power check
EF MO CHECK C14 Traverse (MO) check
EF CD CHECK C15 Traverse (CD) check
FBIAS CHECK C16 Focus bias check
ScurveCHECK C17 S-curve check
VERIFYMODE C18 Non-volatile memory check
DETRK CHECK C19 Detrack check
0920 CHECK C25 Outermost circumference check
Iop Read C26 IOP data display
Iop Compare C27 Comparison with initial IOP value written in non-volatile memory
ADJ CLEAR C28 Initialization of adjustment value in non-volatile memory
INFORMATION C31 Display of version of microprocessor, etc.
CPLAY 1 MODE C34 Continuous playback mode
CREC 1 MODE C35 Continuous recording mode
• For details of each adjustment mode, refer to "5. Electrical Adjustments" on page 22.
• For details of "Err Display" (C02), refer to "Self-Diagnosis Function" on page 4.
• If a different mode has been selected by mistake, press the MENU/NO button to release that mode.
• Modes with (×) 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 release the mode immediately. Be especially careful not to use a test mode of Develop the unit will not
operate normally.
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Contents Mark Group
Check Service
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