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Model
MDS-JE470 (serv.man2)
Pages
70
Size
3.66 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
mds-je470-sm2.pdf
Date

Sony MDS-JE470 (serv.man2) Service Manual ▷ View online

21
MDS-JE470
Display
AUTO CHECK
Err Display
TEMP ADJUS
LDPWR ADJUS
Iop Write
Iop NV Save
EF MO ADJUS
EF CD ADJUS
FBIAS ADJUS
AG Set (MO)
AG Set (CD)
TEMP CHECK
LDPWR CHECK
EF MO CHECK
EF CD CHECK
FBIAS CHECK
ScurveCHECK
VERIFYMODE
DETRK CHECK
0920 CHECK
Iop Read
Iop Compare
ADJ CLEAR
INFORMATION
CPLAY1MODE
CREC 1MODE
Details
Automatic self-diagnosis
Error history display, clear
Temperature compensation offset adjustment
Laser power adjustment
Iop data writing
Writes current Iop value in read nonvolatile memory using microprocessor
Traverse (MO) adjustment
Traverse (CD) adjustment
Focus bias adjustment
Focus, tracking gain adjustment (MO)
Focus, tracking gain adjustment (CD)
Temperature compensation offset check
Laser power check
Traverse (MO) check
Traverse (CD) check
Focus bias check
S-curve check
Nonvolatile memory check
Detrack check
Most circumference check
Iop data display
Comparison with initial Iop value written in nonvolatile memory
Initialization of nonvolatile memory for adjustment values
Display of microprocessor version, etc.
Continuous playback mode
Continuous recording mode
4-5. SELECTING THE TEST MODE
There are 26 types of test modes as shown below. The groups can be switched by rotating the  l AMS L  knob. After selecting the
group to be used, press the  YES  button. After setting a certain group, rotating the  l AMS L  knob switches between these modes.
Refer to “Group” in the table for details selected.
All adjustments and checks during servicing can be performed in the test mode in the Service group.
• For details of each adjustment mode, refer to “5. Electrical Adjustments”.
For details of “Err Display”, 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 acciden-
tally, press the  MENU/NO  button to exit the mode immediately.
No.
C01
C02
C03
C04
C05
C06
C07
C08
C09
C10
C11
C12
C13
C14
C15
C16
C17
C18
C19
C25
C26
C27
C28
C31
C34
C35
Mark
Group
Check
Service
NOTE: Do not use the test mode in the [Develop] group.
If used, the unit may not operate normally.
If the [Develop] group is set accidentally, press the  MENU/NO  button immediately to exit the [Develop] group.
22
MDS-JE470
“CPLAY1 MID” 
t “CPLAY1 OUT” t “CPLAY1 IN”  
“CREC1 MID” 
t “CREC1 OUT” t “CREC1 IN”  
4-5-1. Operating the Continuous Playback Mode
1. Entering the continuous playback mode
1
Set the disc in the unit. (Whichever recordable discs or discs for playback only are available.)
2
Rotate the  l AMS L  knob and display “CPLAY1 MODE”(C34).
3
Press the  YES  button to change the display to “CPLAY1 MID”.
4
When access completes, the display changes to “C = 
 AD = 
”.
Note : The numbers “ ” displayed show you error rates and ADER.
2. Changing the parts to be played back
1
Press the  YES  button during continuous playback to change the display as below.
When pressed another time, the parts to be played back can be moved.
2
When access completes, the display changes to “C = 
 AD = 
”.
Note : The numbers “ ” displayed show you error rates and ADER.
3. Ending the continuous playback mode
1
Press the  MENU/NO  button. The display will change to “CPLAY1 MODE”(C34).
2
Press the  AEJECT  button to remove the disc.
Note : The playback start addresses for IN, MID, and OUT are as follows.
IN
40h cluster
MID 300h cluster
OUT 700h cluster
4-5-2. Operating the Continuous Recording Mode (Use only when performing self-recording/palyback check.)
1. Entering the continuous recording mode
1
Set a recordable disc in the unit.
2
Rotate the  l AMS L  knob and display “CREC1 MODE” (C35).
3
Press the  YES  button to change the display to “CREC1 MID”.
4
When access completes, the display changes to “CREC 1 (
)” and  
REC
  lights up.
Note : The numbers “ ” displayed shows you the recording position addresses.
2. Changing the parts to be recorded
1
When the  YES  button is pressed during continuous recording, the display changes as below.
When pressed another time, the parts to be recorded can be changed.   
REC
  goes off.
2
When access completes, the display changes to “CREC 1 (
)” and  
REC
  lights up.
Note : The numbers “ ” displayed shows you the recording position addresses.
3. Ending the continuous recording mode
1
Press the  MENU/NO  button. The display changes to “CREC1 MODE”  (C35) and  
REC
  goes off.
2
Press the  A EJECT  button to remove the disc.
Note 1 : The recording start addresses for IN, MID, and OUT are as follows.
IN
40h cluster
MID
300h cluster
OUT
700h cluster
Note 2 : The  MENU/NO  button can be used to stop recording anytime.
Note 3 : Do not perform continuous recording for long periods of time above 5 minutes.
Note 4 : During continuous recording, be careful not to apply vibration.
23
MDS-JE470
Function
G
x
M
m
REC MODE
PLAY MODE
LEVEL/DISPLAY/CHAR
A
REPEAT
Contents
Sets continuous playback when pressed in the STOP state. When pressed during continuous
playback, the tracking servo turns ON/OFF.
Stops continuous playback and continuous recording.
The sled moves to the outer circumference only when this is pressed.
The sled moves to the inner circumference only when this is pressed.
Switches between the pit and groove modes when pressed.
Switches the spindle servo mode (CLV S 
y CLV A).
Switches the displayed contents each time the button is pressed.
Ejects the disc.
Exits the test mode.
4-6. FUNCTIONS OF OTHER BUTTONS
4-7. TEST MODE DISPLAYS
Each time the  LEVEL/DISPLAY/CHAR  button is pressed, the display changes in the following order.
When CPLAY and CREC are started, the display will forcibly be switched to the error rate display as the initial mode.
1. Mode display
Displays “TEMP ADJUST”, “CPLAY1MODE”, etc.
2. Error rate display
Displays the error rate in the following way.
C =         AD =   
C = Indicates the C error.
AD = Indicates ADER.
3. Address display
The address is displayed as follows. (MO:recordable disc, CD:playback only disc)
If the  REC MODE  button is pressed , the display switches from groove to pit or
vice versa.
h =         s =         (MO pit and CD)
h =         a =         (MO groove)
h = Indicates the header address.
s = Indicates the SUBQ address.
a = Indicates the ADIP address.
Note: “–” is displayed when the address cannnot be read.
Mode display
Error rate display
Address display
Auto gain display (Not used in servicing)
Detrack check display (Not used in servicing)
IVR display (Not used in servicing)
C1 error and Jitter display
(Not used in servicing)
AD error and Jitter display
(Not used in servicing)
24
MDS-JE470
G
X
REC
SYNC
L.SYNC
OVER
B/1
A-/REP
REC MODE
DISC/LP2
SLEEP/SHUF
MONO
Servo OFF
Tracking servo ON
Recording mode OFF
CLV normal mode
Tracking offset cancel OFF
Groove
Low reflection
CLV A
CLV UNLOCK
Contents
When Lit
When Off
Display
Servo ON
Tracking servo OFF
Recording mode ON
CLV low speed mode
ABCD adjustment completed
Tracking offset cancel ON
Tracking auto gain OK
Focus auto gain OK
Pit
High reflection
CLV S
CLV LOCK
4-8. MEANINGS OF OTHER DISPLAYS
4-9. AUTOMATIC SELF-DIAGNOSIS FUNCTION
This test mode performs CREC and CPLAY automatically for mainly checking the characteristics of the optical pick-up.
To perform this test mode, the laser power must first be checked.
Perform AUTO CHECK after the laser power check and Iop check.
Procedure
1. Press the  YES  button. If “LDPWR                   ” is displayed, it means that the laser power check has not been performed. In this case,
perform the laser power check and Iop compare, and then repeat from step 1.
2. If a disc is in the mechanical deck, it will be ejected forcibly.
“DISC IN” will be displayed in this case. Load a test disc (MDW-74/GA-1) which can be recorded.
3. If a disk is loaded at step 2, the check will start automatically.
4. When “XX CHECK” is displayed, the item corresponding to XX will be performed.
When “06 CHECK” completes, the disc loaded at step 2 will be ejected. “DISC IN” will be displayed. Load the check disc (MD) TDYS-1.
5. When the disc is loaded in step 4, the check will automatically be resumed from “07 CHECK”.
6. After completing to test item 12, check OK or NG will be displayed. If all items are OK, “CHECK ALL OK” will be displayed. If any item
is NG, it will be displayed as “NG:xxxx”.
When “CHECK ALL OK” is displayed, it means that the optical pick-up is normal. Check the operations of the other spindle motor, thread
motor, etc.
When displayed as “NG:xxxx”, it means that the optical pick-up is faulty. In this case, replace the optical pick-up.
4-10. INFORMATION
Display the software version.
Procedure
1. If displayed as “INFORMATION”, press the  YES  button.
2. The software version will be displayed.
3. Press the  MENU/NO  button to end this mode.
4-11. WHEN MEMORY NG IS DISPLAYED
If the nonvolatile memory data is abnormal, “E001”/”MEMORY NG” will be displayed so that the MD deck does not continue operations.
In this case, set the test mode promptly and perform the following procedure.
Procedure
1. Set the test mode. (Refer to 4-2.)
2. Normally a message for selecting the test mode will be displayed. However if the nonvolatile memory is abnormal, the following will be
displayed. “INIT EEP?”
3. Press the  STOP  button and  A EJECT  button together.
4. Rotate the  l AMS L  knob and select MDM-7A.
5. Press the  l AMS L  knob. If the nonvolatile memory is successfully overwritten, the normal test mode will be set and a message
to select the test mode will be displayed.
Note: 
 When this setting is doing, readjustment is necessary.
            (Adjustment it same as IC195 exchanged)
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Display

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