MDS-JB980 - Sony Audio Service Manual (repair manual)

mds-jb980 service manual
Model
MDS-JB980
Pages
70
Size
4.54 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
mds-jb980.pdf
Date

Read Sony MDS-JB980 Service Manual online

1
SERVICE MANUAL
AEP Model
UK Model
MDS-JB980
MINIDISC DECK
SPECIFICATIONS
Ver. 1.4  2010.12
Sony Corporation
Published by Sony Techno Create Corporation
9-874-080-05
2010L05-1
© 2010.12
Model Name Using Similar Mechanism
MDS-JE780
MD Mechanism Type
MDM-7S1A
Optical Pick-up Type
KMS-260B/260E
US and foreign patents licensed form Dolby Laboratories
Licensing Corporation.
System
MiniDisc digital audio system
Disc
MiniDisc
Laser
Semiconductor laser
(
λ
  = 780 nm)
Emission duration: continuous
Laser output
MAX 44.6 
µ
W
1
)
1) This output is the value measured at a distance of 200 mm from
the objective lens surface on the Optical Pick-up Block with 7 mm
aperture.
Laser diode
Material: GaAlAs
Revolutions (CLV)
400 rpm to 900 rpm
Error correction
ACIRC (Advanced Cross Interleave
Reed Solomon Code)
Sampling frequency
44.1 kHz
Coding
ATRAC (Adaptive Transform
Acoustic Coding)/ATRAC 3
Modulation system
EFM (Eight-to-Fourteen Modulation)
Number of channels
2 stereo channels
Frequency response
5 to 20,000 Hz 
±
0.3 dB
Signal-to-noise ratio
Over 100 dB during play
Wow and flutter
Below measurable limit
Inputs
ANALOG IN
Jack type: phono
Impedance: 47 kilohms
Rated input: 500 mVrms
Minimum input:125 mVrms
DIGITAL OPTICAL IN
Connector type: square optical
Impedance: 660 nm (optical wave length)
DIGITAL COAXIAL IN
Jack type: phono
Impedance: 75 ohms
Rated input: 0.5 Vp-p, 
±
20%
Outputs
PHONES
Jack type: stereo phone
Rated output: 28 mW
Load impedance: 32 ohms
ANALOG OUT
Jack type: phono
Rated output: 2 Vrms (at 50 kilohms)
Load impedance: over 10 kilohms
DIGITAL OPTICAL OUT
Connector type: square optical
Rated output: –18 dBm
Load impedance: 660 nm
(optical wave length)
General
Power requirements
230 V AC, 50/60 Hz
Power consumption
15 W (0.45 W in standby mode)
Dimensions (approx.)
430 
×
 111 
×
 286 mm (w/h/d) incl.
projecting parts and controls
Mass (approx.)
4.5 kg
Supplied accessories
Audio connecting cords (2)
Optical cable (1)
OpenMG Jukebox CD-ROM (1)
Operating instructions for OpenMG Jukebox (1)
Remote commander (remote) (1)
R6 (size-AA) batteries (2)
USB cable (1)
Design and specifications are subject to change without
notice.
2
MDS-JB980
Laser component in this product is capable
of emitting radiation exceeding the limit for
Class 1.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radia-
tion exposure.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of soldering iron around 270˚C
during repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
NOTES  ON  HANDLING  THE  OPTICAL  PICK-UP
BLOCK  OR  BASE  UNIT
The laser diode in the optical pick-up block may suffer electrostatic
break-down because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
NOTES  ON  LASER  DIODE  EMISSION  CHECK
Never look into the laser diode emission from right above when
checking it for adjustment. It is feared that you will lose your sight.
CAUTION
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type recommended by
the manufacturer.
Discard used batteries according to the manufacturer’s instructions.
SAFETY-RELATED  COMPONENT  WARNING!!
COMPONENTS  IDENTIFIED  BY  MARK  
0
  OR  DOTTED  LINE
WITH  MARK  
0
  ON  THE  SCHEMATIC  DIAGRAMS  AND  IN
THE  PARTS  LIST  ARE  CRITICAL  TO  SAFE  OPERATION.
REPLACE  THESE  COMPONENTS  WITH  SONY  PARTS  WHOSE
PART  NUMBERS  APPEAR  AS  SHOWN  IN  THIS  MANUAL  OR
IN  SUPPLEMENTS  PUBLISHED  BY  SONY.
3
MDS-JB980
SELF-DIAGNOSIS FUNCTION
The self-diagnosis function consists of error codes for customers which are displayed automatically when errors occur, and error codes which
show the error history in the test mode during servicing. For details on how to view error codes for the customer, refer to the following box
in the instruction manual. For details on how to check error codes during servicing, refer to the following “Procedure for using the Self-
Diagnosis Function (Error History Display Mode)”.
Procedure for using the Self-Diagnosis Function (Error History Display Mode).
Note:
Perform the self-diagnosis function in the “error history display mode” in the test mode. The following describes the least required
procedure. Be careful not to enter other modes by mistake. If you set other modes accidentally, press the  MENU/NO  button to exit
the mode.
1. While pressing the  lAMSL   knob and  x  button, connect the power plug to the outlet, and release the  lAMSL  knob and
x  button.
When the test mode is set, “[Check]” will be displayed.
2. Rotate the  lAMSL  knob and when “[Service]” is displayed, press the  YES  button.
3. Rotate the  lAMSL  knob and display “Err Display”.
4. Pressing the  YES  button sets the error history mode and displays “op rec tm”.
5. Select the contents to be displayed or executed using the  lAMSL  knob.
6. Pressing the  lAMSL   knob will display or execute the contents selected.
7. Pressing the  lAMSL   knob another time returns to step 4.
8. Pressing the  MENU/NO  button displays “Err Display” and exits the error history mode.
9. To exit the test mode, press the  REPEAT  button. The unit sets into the STANDBY state, the disc is ejected, and the test mode ends.
, Take out the MD and close the record-
protect slot. 
You tried to record a CD with a format 
that the external device connected to the 
deck does not support, such as CD-ROM 
or video CD.
, Remove the disc and insert a music 
CD.
, Set the deck in a stable surface, and 
repeat the recording procedure.
The inserted MD is dirty (with smudges, 
fingerprints, etc.), scratched, or 
substandard in quality.
, Replace the disc and repeat the 
recording procedure.
, Take out the MD and insert it again.
, Insert another disc.
, If possible, erase all the tracks on the 
MD .
The sound source is a copy of 
commercially available music software, or 
you tried to record a CD-R (Recordable 
CD).
, The Serial Copy Management System 
prevents making a digital copy .
You cannot record a CD-R.
The sporadic appearance of this message 
is caused by the digital signal being 
recorded. This will not affect the 
recording.
While recording from a digital component, 
the digital connecting cable 
,
Check the connection or turn the 
digital component back on.
There is an error in the internal data that 
the deck needs in order to operate.
, Consult your nearest Sony dealer.
There is a problem with the optical 
pickup.
, The optical pick-up  may have failed. 
Consult your nearest Sony dealer.
There is a problem with the loading.
,The loading may have failed. Consult 
      your nearest Sony dealer.
Self-diagnosis function 
The deck’s self-diagnosis function automatically checks 
the condition of the MD deck when an error occurs, then 
issues a three- or five-digit code and an error message on 
the display. If the code and message alternate, find them in 
the following table and perform the indicated 
countermeasure. Should the problem persist, consult your 
nearest Sony dealer.
Three- or five-
digit code/
Message
Cause/Remedy
Three- or five-
digit code/
Message
Cause/Remedy
C11/Protected
C12/Cannot Copy
C13/REC Error
r
C13/Read Erro
C14/Toc Error
C41/Cannot Copy
C71/Din Unlock
E0001/
MEMORY NG
E010
E0201/
LOADING NG
1/
LASER NG
The inserted MD is record-protected.
  The recording was not made properly.
  The deck could not read the TOC on the  
MD properly.
The deck could not read the TOC on the 
 
MD properly.
may have been 
incompletely connected and come loose 
or the digital component was turned off.
4
MDS-JB980
ITEMS OF ERROR HISTORY MODE ITEMS AND CONTENTS
Selecting the Test Mode
Display
op rec tm
op play tm
spdl rp tm
retry err
total err
err history
retry adrs
er refresh
tm refresh
op change
spdl change
History
Displays the total recording time.
When the total recording time is more than 1 minute, displays the hour and minute
When less than 1 minute, displays “Under 1 min”
The display time is the time the laser is set to high power, which is about 1/4 of the actual recording time.
Displays the total playback time.
When the total playback time is more than 1 minute, displays the hour and minute
When less than 1 minute, displays “Under 1 min”
Displays the total rotating time of the spindle motor.
When the total rotating time is more than 1 minute, displays the hour and minute
When less than 1 minute, displays “Under 1 min”
Displays the total number of retry errors during recording and playback
Displays “r xx p yy”. xx is the number of errors during recording. yy is the number of errors during playback.
This is displayed in hexadecimal from 00 to FF.
Displays the total number of errors
Displays “total xx”. This is displayed in hexadecimal from 00 to FF.
Displays the past ten errors.
Displays “0x [email protected]@”.
X is the history number. The younger the number, the more recent is the history (00 is the latest). @@ is the error
code.
Select the error history number using the  lAMSL  knob.
Displays the past five retry addresses.
Displays “xx ADRS yyyy”, xx is the history number, yyyy is the cluster with the retry error.
Select the error history number using the  lAMSL  knob.
Mode for erasing the error and retry address histories
Procedure
1. Press the  lAMSL  knob when displayed as “er refresh”.
2. Press the  YES  button when the display changes to “er refresh?”.
When “complete!” is displayed, it means erasure has completed.
Be sure to check the following after executing this mode.
*Data has been erased.
*Perform recording and playback, and check that the mechanism is normal.
Mode for erasing the total time of recording and playback
Procedure
1. Press the  
lAMSL
  knob when displayed as “tm refresh”.
2. Press the  YES  button when the display changes to “tm refresh?”.
When “complete!” is displayed, it means erasure has completed.
Mode for erasing the total time of op rec tm, op play tm.
These histories are based on the time of replacement of the optical pickup. If the optical pick-up has been replaced,
perform this procedure and erase the history.
Procedure
1. Press the  lAMSL
 
  knob when displayed as “op change”.
2. Press the  YES  button when the display changes to “op chang?”.
When “Complete!” is displayed, it means erasure has completed.
Mode for erasing the total spdl rp tm time
These histories are based on the time of replacement of the spindle motor. If the spindle motor has been replaced,
perform this procedure and erase the history.
Procedure
1. Press the  lAMSL  knob when displayed as “spdl change”
2. Press the  YES  button when the display changes to “spdl chang?”
When “Complete!” is displayed, it means erasure has completed.
Page of 70
Display

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