Sony MDS-JB940 Minidisc player
Manufacturer:
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Model:
MDS-JB940
Date:
2000
Category:
Group:
Description:
Information
System MiniDisc digital Audio system
Disc MiniDisc
Laser Semiconductor laser (λ = 780 nm)
Emission duration: continuous
Laser output MAX 44.6 μW1)
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
ANALOG IN Jack type: phono
Impedance: 47 kilohms
Rated input: 500 mVrms
Minimum input: 125 mVrms
Manual type:
Service Manual
Pages:
74
Size:
18.84 Mbytes (19758803 Bytes)
Language:
english
Revision:
Manual ID:
9-929-274-11
Date:
Quality:
Electronic document, no scan, very well readable.
Upload date:
2011 06 22
MD5:
5516cb026996fb465f03d6654a2b83f4
Downloads:
1444
Information
TABLE OF CONTENTS
MODEL IDENTIFICATION
— BACK PANEL —
Model
AEP, UK models
Canadian model
US model
Part No.
4-228-507-0s
4-228-507-1s
4-228-507-2s
Part No.
SELF-DIAGNOSIS FUNCTION ... 4
1. SERVICE NOTE ... 6
2. GENERAL ... 11
3. DISASSEMBLY ... 14
4. TEST MODE ... 17
5. ELECTRICAL ADJUSTMENTS ... 22
6. DIAGRAMS
6-1. Block Diagram MAIN Section ... 31
6-2. Block Diagram DISPLAY/POWER Section ... 32
6-3. Note for Printed Wiring Boards and
Schematic Diagrams ... 33
6-4. Circuit Board Location ... 33
6-5. Waveforms ... 34
6-6. Printed Wiring Board BD Board ... 35
6-7. Schematic Diagram BD Board (1/2) ... 36
6-8. Schematic Diagram BD Board (2/2) ... 37
6-9. Printed Wiring Board HP Board/KEY Board ... 38
6-10. Schematic Diagram HP Board/KEY Board ... 38
6-11. Schematic Diagram MAIN Board (1/3) ... 39
6-12. Schematic Diagram MAIN Board (2/3) ... 40
6-13. Schematic Diagram MAIN Board (3/3) ... 41
6-14. Printed Wiring Board MAIN Board (Side A) ... 42
6-15. Printed Wiring Board MAIN Board (Side B) ... 43
6-16. Printed Wiring Board PANEL Section ... 44
6-17.Schematic Diagram PANEL Section ... 45
6-18.Schematic Diagram AC Board ... 46
6-19. Printed Wiring Board AC Board ... 47
6-20. IC Block Diagrams ... 48
6-21. IC Pin Function Description ... 53
7. EXPLODED VIEWS ... 60
8. ELECTRICAL PARTS LIST ... 64