ZS-M30 - Sony Audio Service Manual (repair manual). Page 2

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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

General
Speaker

Full-range: 8 cm (3 1 ⁄4 in.) dia., 4 

Ω

 cone type (2)

Panorama sound: 5 cm (2 in.) dia., 12 

Ω

 cone type (2)

Inputs

LINE IN (stereo minijack): Sensitivity 436 mV/870 mV

Outputs

Headphones jack (stereo minijack) (1):
For 32 

Ω

impedance headphones

Maximum power output

Full-range: 8 W
Panorama sound: 3.4 W

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

1-1. Notes on Handling the Optical Pick-up Block or

Base Unit ............................................................................ 3

1-2. Notes on Laser Diode Emission Check .............................. 3
1-3. Notes on Chip Component Replacement ........................... 3
1-4. Flexible Circuit Board Repairing ....................................... 3
1-5. Chuck Plate Jig on Repairing ............................................. 3
1-6. Checking the Laser Diode and Focus Search Operation .... 3
1-7. Checks Prior to Parts Replacement and Adjustments

 (for MD Section) ............................................................... 4

Playing a CD ...................................................................... 5
Recording a Whole CD (Synchronized Recording) ........... 5
Playing an MD ................................................................... 6
Listening to the Radio ........................................................ 6

3-1. Cabinet (Rear), Cabinet (Front) ......................................... 7
3-2. BATT (B) Board, BATT (A) Board, Power Board ............. 7
3-3. Cabinet (Upper) ASSY ....................................................... 8
3-4. Main Board, LCD Board .................................................... 8
3-5. CD Board ........................................................................... 9
3-6. Top Board ........................................................................... 9
3-7. Tuner Board ........................................................................ 9
3-8. MD Block ASSY .............................................................. 10
3-9. SW (L) Board, Jack Board, SW (R) Board ...................... 10
3-10. MD Board ...................................................................... 11
3-11. REC Board, DETECT Board ......................................... 11
3-12. Over Write Head (HR901), MD Optical Pick-up,

D SW Board ................................................................... 12

4-1. MD Section ...................................................................... 13
4-2. Section the Test Mode ...................................................... 13
4-3. Releasing the Test Mode .................................................. 13
4-4. Basic Operations of the Test Mode .................................. 13
4-5. Selecting the Test Mode ................................................... 14
4-6. Functions of Other Buttons .............................................. 16
4-7. Test Mode Displays .......................................................... 16
4-8. Meanings of Other Displays ............................................. 16

Power requirements

For personal minidisc system:
230 V AC, 50 Hz
For back-up memory:
4.5 V DC, 3 R6 (size AA) batteries
For remote control:
3 V DC, 2 R6 (size AA) batteries

Power consumption

26 W

Dimensions (incl.projecting parts)

approx. 475 X 165.5 X 249 mm (w/h/d)
(18 3/4 X 6 5 ⁄8 X 9 7/8 inches )

Mass

approx. 4.6 kg (10 lb. 2 oz)

Supplied accessories

Mains lead (1)
Remote control (1)
MW/LW loop aerial (1)
AV connecting cord (1)
Audio connecting cord (1)

Design and specifications are subject to change without
notice.

5-1. Tuner Section ................................................................... 17
5-2. MD section ....................................................................... 19
5-3. CD section ........................................................................ 25

6-1. IC Pin Function Descriptions ........................................... 28
6-2. Block Diagrams (1/4) ....................................................... 37
6-3. Block Diagrams (2/4) ....................................................... 38
6-4. Block Diagrams (3/4) ....................................................... 39
6-5. Block Diagrams (4/4) ....................................................... 40
6-6. Printed Wiring Boards -Main Section- ............................. 41
6-7. Schematic Diagram -Main Section (1/3)- ........................ 42
6-8. Schematic Diagram -Main Section (2/3)- ........................ 43
6-9. Schematic Diagram -Main Section (3/3)- ........................ 44
6-10. Printed Wiring Boards -Power Section- ......................... 45
6-11. Printed Wiring Boards -Tuner Section- .......................... 46
6-12. Schematic Diagram -Tuner Section- .............................. 47
6-13. Printed Wiring Boards -Control Section- ....................... 48
6-14. Schematic Diagram -Control Section- ........................... 49
6-15. Printed Wiring Boards -CD Section- .............................. 50
6-16. Schematic Diagram -CD Section- .................................. 51
6-17. Printed Wiring Boards -MD Section- ............................. 52
6-18. Schematic Diagram -MD Section (1/2)- ........................ 53
6-19. Schematic Diagram -MD Section (2/2)- ........................ 54

7-1. Rear Cabinet Section ........................................................ 64
7-2. Front Cabinet Section ....................................................... 65
7-3. Upper Cabinet Section ..................................................... 66
7-4. Optical Pick-up Section .................................................... 67
7-5. MD Section -1 .................................................................. 68
7-6. MD Section -2 .................................................................. 69

.................................... 70