ZS-M7 - Sony Audio Service Manual (repair manual). Page 2

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Specifications ...........................................................................  1

........................................................... 3

...................................................................... 5

3-1. Cabinet (Front) ASSY, Cabinet (Rear) ASSY .......... 21
3-2. Left Key Board, Front Key Board, Top Key board,
       Right Key Board, Relay Board ................................. 22
3-3. FL Board, Trans Board ............................................. 22
3-4. Tuner Board, FM ANT Board, AM ANT Board ....... 23
3-5. MD Chassis ASSY ................................................... 23
3-6. MD Block ASSY, Filter Board ................................. 24
3-7. Audio Board, HP Board, Line in Board .................... 24
3-8. Main Board, CD Block ASSY .................................. 25
3-9. Shield Case (Top), Shield Case (Bottom) ................. 25
3-10. DG Board, BD Board, MD Mechanism Deck ........ 26
3-11. Shutter ASSY .......................................................... 26
3-12. SW Board ............................................................... 27
3-13. Slider ASSY, “Head, Over Write” .......................... 27
3-14. MD Optical Pick-up Block ..................................... 28
3-15. Loading Board, “Tray ASSY, CD” ......................... 29
3-16. CD Optical Pick-up Block, Pick-up Relay Board .. 29

4-1. Caution When Using the Test Mode ......................... 30
4-2. Test Mode Settings ................................................... 30
4-3. Releasing the Test Mode ........................................... 30
4-4. Basic Operations of the Test Mode ........................... 30
4-5. Selecting the Test Mode ............................................ 30
4-6. Functions of Other Buttons ...................................... 31
4-7 Test Mode Display ..................................................... 31

5-1. Cautions When Checking Laser Diode Emission ..... 32
5-2. Cautions When Handling
        the Optical Pick-up (KSM-260A) ............................ 32
5-3. Cautions During Adjustment .................................... 32
5-4. Creating a Continuous Recording Disk .................... 32
5-5. Temperature Compensation Offset Adjustment ........ 33

Recording/Playback time

Maximum 74 minutes (with MDW-74)

Revolutions

400 rpm to 900 rpm (CLV)

Error correction

Advanced Cross Interleave Reed Solomon Code (ACIRC)

Sampling frequency

44.1 kHz

Cording

Adaptive Transform Acoustic Cording (ATRAC)

Modulation system

EFM (Eight-to-Fourteen Modulation)

Number of programme positions

2 stereo programme positions

Frequency response

20 – 20,000 Hz +1 /–2 dB

Signal-to-noise ratio

Over 80 dB (during playback)

Wow and flutter

Below measurable limit

Speaker

Full range : 8 cm (3 in.) dia., 4ohms, cone type (2)

Inputs

LINE IN (stereo minijack) : Sensitivity 436 mV/691 mV

Outputs

Headphones jack (stereo minijack) (2) : For 32 ohms
impedance headphones

Power outputs

7 W + 7 W

Power requirements

For personal minidisc system :
US Model :120V AC, 60Hz
EXCEPT US Model :230V AC, 50Hz
For remote commander :
3V DC, 2 size AA (R6) batteries

Power consumption

30 W

Dimensions (incl. projecting parts)

Approx. 528 x 275 x 139 mm (w/h/d)
(20 

7

/

8

 x 10 

7

/

8

 x 5 

1

/

2

 inches)

Mass

approx. 6.4 kg (14 lb. 2 oz)

Supplied accessories

Remote commander (1)
AM loop aerial (1) (US Model)
MW/LW loop aerial (1) (EXCEPT US Model)
Speaker nets (2) (EXCEPT US Model)

Design and specifications are subject to change without notice.

5-6. Laser Power Adjustment ........................................... 33
5-7. Traverse Adjustment ................................................. 33
5-8. Focus Bias Adjustment ............................................. 34
5-9. Error Rate Check ...................................................... 35
5-10. Focus Bias Check ................................................... 35
5-11. Adjustment and Connection Locations ................... 35

6-1. Explanation of IC Terminals ..................................... 39
6-2. Block Diagram (1) .................................................... 46
6-3. Block Diagram (2) .................................................... 49
6-4. Printed Wiring Boards –Main Section – ................... 55
6-5. Schematic Diagram –Main Section (1/2) – .............. 59
6-6. Schematic Diagram –Main Section (2/2) – .............. 63
6-7. Printed Wiring Boards
        –Tuner Section (US Model) – .................................. 67
6-8. Schematic Diagram
       –Tuner Section (US Model) – ................................... 69
6-9. Printed Wiring Boards
       –Tuner Section (EXCEPT US Model) – ................... 72
6-10. Schematic Diagram
        –Tuner Section (EXCEPT US Model) – .................. 74
6-11. Schematic Diagram –BD Section – ........................ 77
6-12. Printed Wiring Boards –BD Section – .................... 79
6-13. Schematic Diagram –Power Section – ................... 82
6-14. Printed Wiring Boards –Power Section – ............... 85
6-15. Schematic Diagram –DG Section – ........................ 87
6-16. Printed Wiring Boards –DG Section – ................... 90
6-17. Printed Wiring Boards –Front Key Section – ......... 93
6-18. Schematic Diagram –Front Key Section – ............. 97

7-1. Front Cabinet Section ............................................. 106
7-2. Rear Cabinet Section .............................................. 107
7-3. Chassis Section ....................................................... 108
7-4. MD Section (1) ....................................................... 109
7-5. MD Section (2) ........................................................ 110
7-6. CD Section ............................................................... 111
7-7. Optical Pick-up Section ........................................... 112

.................................. 113