CDC-Z137 - Sony Car Audio Service Manual (repair manual)

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Model Name Using Similar Mechanism

NEW

CD Drive Mechanism Type

MG-930A-185

Optical Pick-up Name

OPTIMA-752B2

US Model

Canadian Model

Frequency Range: 87.5 MHz – 108 MHz
Usable Sensitivity: 12.7 dBf
50 dB Quieting Sensitivity: 17.2 dBf
IF Rejection: 100 dB
Frequency Response: 30 Hz – 15,000 Hz
S/N Ratio: 70 dB
Stereo Separation: 35 dB at 1 kHz
Alternate Channel Selectivity: 90 dB
Capture Ratio: 3 dB

Frequency Range: 530 kHz – 1,710 kHz
Usable Sensitivity: 30 µV (30 dB)

Frequency Response: 17 Hz – 20 kHz +0/–3 dB
Dynamic Range: More than 85 dB
Channel Separation: More than 60 dB
S/N Ratio: More than 90 dB
Wow/Flutter: Unmeasurable

Max. Power Output: 45 W 

× 4 channels

Input sensitivity (load impedance) AUX: 300 mV (10 k

Ω)

• The tuner and CD sections have no adjustments.

2003A0400-1

© 2003. 01

– Continued on next page –

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Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous
radiation exposure.

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Power-Supply Voltage: 14.4 V (11 to 16 V allowable),

DC, negative ground

Load Impedance: 4 

Ω

Tone Control: Bass ±10 dB at 100 Hz,

Treble ±10 dB at 10 kHz

Preamp Output Voltage (load impedance): 2.2 V (10 k

Ω)

Installed size: 182 (W) 

× 53 (H) × 155 (D) mm

(7 

1/4

 (W) 

× 2 

1/8

 (H) 

× 6 

1/8

 (D) inches)

The laser diode in the optical pick-up block may suffer electrostatic
breakdown because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic breakdown 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.

The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pick-
up block. Therefore, when checking the laser diode emission, ob-
serve from more than 30 cm away from the objective lens.

• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

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Connections ............................................................................. 4

2-1.   Front Panel Assy ................................................................. 6
2-2.   CD Mechanism Block ......................................................... 6
2-3.   Cover ................................................................................... 7
2-4.   Key Board ........................................................................... 7
2-5.   Aux Board ........................................................................... 8
2-6.   Removal The Solders .......................................................... 8
2-7.   Main Board ......................................................................... 9
2-8.   Heat Sink ............................................................................. 9
2-9.   Sub Board .......................................................................... 10
2-10. Servo Board ....................................................................... 10
2-11. Floating Block Assy .......................................................... 11
2-12. Lever Assy (CD Up Holder) .............................................. 11
2-13. Lever (CD Roller) Sub Assy ............................................. 12
2-14. Lever Assy (CD Holder) ................................................... 12
2-15. Motor (Sled) Sub Assy ...................................................... 13
2-16. Pick-up Sub Assy .............................................................. 13

3-1.   IC Pin Descriptions ........................................................... 15
3-2.   Block Diagram –CD Section– ........................................... 19
3-3.   Block Diagram –Main Section– ........................................ 20
3-4.   Block Diagram –Front Section– ........................................ 21
3-5.   Circuit Boards Location .................................................... 21
3-6.   Printed Wiring Boards –CD Mechanism Section– ............ 22
3-7.   Schematic Diagram –CD Mechanism Section– ................ 24
3-8.   Printed Wiring Boards –Main Section– ............................ 25
3-9.   Schematic Diagram –Main Section (1/2)– ........................ 26
3-10. Schematic Diagram –Main Section (2/2)– ........................ 27
3-11. Printed Wiring Board –Front Section– .............................. 28
3-12. Schematic Diagram –Front Section– ................................ 29
3-13. IC Block Diagrams ............................................................ 30

4-1.   Chassis Section ................................................................. 32
4-2.   Front panel Section ........................................................... 33
4-3.   CD Mechanism Section (1) ............................................... 34
4-4.   CD Mechanism Section (2) ............................................... 35

........................................ 36

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This section is extracted
from instruction manual.