MDS-JE470 — Sony Audio Service Manual (repair manual)

Model
MDS-JE470
Pages
70
Size
3.85 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
mds-je470.pdf
Date

View Sony MDS-JE470 Service Manual online

MDS-JE470
SPECIFICATIONS
SERVICE MANUAL
MINIDISC DECK
Model Name Using Similar Mechanism
MDS-S50
MD Mechanism Type
MDM-7A
Optical Pick-up Type
KMS-260B/260E
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
US and foreign patents licensed form Dolby Laboratories
Licensing Corporation.
Ver. 1.4  2006.12
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 96 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)
Outputs
ANALOG OUT
Jack type: phono
Rated output: 2 Vrms (at 50 kilohms)
Load impedance: over 10 kilohms
General
Power requirements
U.S.A. and Canadian models:
120 V AC, 60Hz
European model:
230 V AC, 50/60Hz
Australian model:
240 V AC, 50/60Hz
Hong Kong model:
220 – 240 V AC, 50/60Hz
Other models:
110 – 120/220 – 240 V
AC, 50/60Hz
Adjustable with voltage selector
Power consumption
14 W (0.5 W in standby mode)
Dimensions (approx.)
430 x 95 x 285 mm
(w/h/d) incl. projecting parts and controls
Mass (approx.)
3.0 kg
Supplied accessories
Audio connecting cords (2)
Optical cable (1)
Remote commander (remote) (1)
R6 (size-AA) batteries (2)
Design and specifications are subject to change without notice.
Sony Corporation
Home Audio Division
Published by Sony Techno Create Corporation
9-873-891-15
2006L02-1
© 2006.12
2
MDS-JE470
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.
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
C11/Protected
The inserted MD is record-protected.
, Take out the MD and close the record-
protect slot. 
C12/Cannot Copy
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.
C13/REC Error
The recording was not made properly.
, 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.
C13/Read Error
The deck could not read the TOC on the 
MD properly.
, Take out the MD and insert it again.
C14/Toc Error
The deck could not read the TOC on the 
MD properly.
, Insert another disc.
, If possible, erase all the tracks on the 
MD .
C41/Cannot Copy
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.
C71/Din Unlock
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 
connected through the DIGITAL IN 
connector, the digital connecting cable 
was unplugged or the digital component 
turned off.
, Connect the cable or turn the digital 
component back on.
E0001/
MEMORY NG
There is an error in the internal data that 
the deck needs in order to operate.
, Consult your nearest Sony dealer.
E0101/
LASER NG
There is a problem with the optical 
pickup.
, The optical pick-up  may have failed. 
Consult your nearest Sony dealer.
Three- or five-
digit code/
Message
Cause/Remedy
VARNING
Explosionsfara vid felaktigt batteribyte.
Använd samma batterityp eller en likvärdig typ som
 rekommenderas av apparattillverkaren.
Kassera använt batteri enligt gällande föreskrifter.
VAROITUS
Paristo voi räjähtää, jos se on virheellisesti asennettu.
Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin.
Hävitä käytetty paristo valmistajan ohjeiden mukaisesti.
ADVARSEL!
Lithiumbatteri-Eksplosionsfare ved fejlagtig håndtering.
Udskiftning må kun ske med batteri
af samme fabrikat og type.
Levér det brugte batteri tilbage til leverandøren.
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.
ADVARSEL
Eksplosjonsfare ved feilaktig skifte av batteri.
Benytt samme batteritype eller en tilsvarende type
anbefalt av apparatfabrikanten.
Brukte batterier kasseres i henhold til fabrikantens
instruksjoner.
Ver 1.1 2002.03
3
MDS-JE470
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 change
op 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 change?”.
When “Complete!” is displayed, it means erasure has completed.
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.
4
MDS-JE470
Description
Table of Error Codes
Error Code
10
12
20
21
22
23
24
30
31
40
41
42
43
50
51
Could not load
Loading switches combined incorrectly
Timed out without reading the top of PTOC
Could read top of PTOC, but detected error
Timed out without accessing UTOC
Timed out without reading UTOC
Error in UTOC
Could not start playback
Error in sector
Retry cause generated during normal recording
Retried in DRAM overflow
Retry occurred during TOC writing
Retry aborted during S.F editing
Other than access processing, and could not read address.
Focus NG occurred and overran.
MODEL IDENTIFICATION
— BACK PANEL —
Part No.
• Abbreviation
CND : Canadian model
SP
: Singapore model
HK
: Hong Kong model
AUS
: Australian model
MODEL
AEP, UK models
US model
CND model
SP models
HK model
AUS model
PARTS No.
4-233-025-0s
4-233-025-1s
4-233-025-2s
4-233-025-3s
4-233-025-4s
4-233-025-5s
Display
History
spdl change
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 change?”
When “Complete!” is displayed, it means erasure has completed.
TABLE OF CONTENTS
1. SERVICING NOTES 
........................................................ 5
2. GENERAL
........................................................................ 12
3. DISASSEMBLY
3-1.   Disassembly flow .............................................................. 13
3-2.   Upper Case (408226) ........................................................ 14
3-3.   Front Panel Section ........................................................... 14
3-4.   Main Board ....................................................................... 15
3-5.   PT Board, VOL-SEL Board (SP model) ........................... 15
3-6.   Mechanism Deck Section ( MDM-7A) ............................. 16
3-7.   Over Light Head (HR901), BD Board .............................. 16
3-8.   Holder Assy ....................................................................... 17
3-9.   Loading Motor Assy (M103) ............................................ 17
3-10. Sled Motor Assy (M102), Slider ....................................... 18
3-11. Optical Pick-up .................................................................. 18
3-12. Spindle Moter Assy (M101) .............................................. 19
4. TEST  MODE
  ......................................................................20
5. ELECTRICAL ADJUSTMENTS
............................... 25
6. DIAGRAMS
6-1. Circuit Boards Location ...................................................... 36
6-2. Block Diagrams
• BD Section ....................................................................... 38
• Main Section .................................................................... 39
6-3. Printed Wiring Board – BD Board – ................................... 40
6-4. Schematic Diagram – BD Section (1/2) – ........................... 41
6-5. Schematic Diagram – BD Section (2/2) – ........................... 42
6-6. Schematic Diagram – Main Section (1/2) – ........................ 43
6-7. Schematic Diagram – Main Section (2/2) – ........................ 44
6-8. Printed Wiring Board – Main Section  – ............................. 45
6-9. Printed Wiring Board – Display Section – .......................... 46
6-10.  Schematic Diagram – Display Section – .......................... 47
6-11.  Printed Wiring Board – Power Section – ......................... 48
6-12. Schematic Diagram – Power Section – ............................ 49
6-13.  IC Block Diagrams ........................................................... 50
6-14. IC Pin Functions ............................................................... 52
7. EXPLODED VIEWS
7-1. Chassis Section ................................................................... 59
7-2. Front Panel Section ............................................................. 60
7-3. Mechanism Section-1 (MDM-7A) ...................................... 61
7-4. Mechanism Section-2 (MDM-7A) ...................................... 62
8. ELECTRICAL PARTS LIST
........................................ 63
5
MDS-JE470
SECTION 1
SERVICE NOTES
This appliance is classified as a
CLASS 1 LASER product. The
CLASS 1 LASER PRODUCT
MARKING is located on the
rear exterior.
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.
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.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE 0 SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
This caution
label is located
inside the unit.
SAFETY  CHECK-OUT
(US model only)
    After correcting the original service problem, perform the fol-
lowing safety checks before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs, screws,
and all other exposed metal parts for AC leakage. Check leakage as
described below.
LEAKAGE
    The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microampers). Leak-
age current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instruments.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a VOM
or battery-operated AC voltmeter. The “limit” indication is 0.75
V, so analog meters must have an accurate low-voltage scale.
The Simpson 250 and Sanwa SH-63Trd are examples of a pas-
sive VOM that is suitable. Nearly all battery operated digital
multimeters that have a 2V AC range are suitable. (See Fig. A)
Fig. A. Using an AC voltmeter to check AC leakage.
0.15
µF
To Exposed Metal
Parts on Set
1.5k
AC
voltmeter
(0.75V)
Earth Ground

Download Sony MDS-JE470 Service Manual (Repair Manual)

Here you can view online or download Sony MDS-JE470 Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair Sony MDS-JE470 Audio. Information contained in Sony MDS-JE470 service manual (repair manual) typically includes:

  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).