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E Model

Chinese Model

Dolby noise reduction manufactured under license from
Dolby Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol 

;

 are trade-marks

of Dolby Laboratories Licensing Corporation.

Model Name Using Similar Mechanism

NEW

CD

CD Mechanism Type

CDM53F-K2BD37A

Section

Base Unit Name

BU-K2BD37A

Optical Pick-up Name

KSM-213D

Tape deck

Model Name Using Similar Mechanism

HCD-ZX30AV

Section

Tape Transport Mechanism Type

TCM-230AWR12

• This set is  the Amplifier, CD player, Tape Deck

and Tuner section in MHC-VZ30AV.

— Continued on next page —

Inputs
VIDEO (AUDIO) IN:

voltage 250 mV,

(phono jacks)

impedance 47 kilohms

MD IN:

voltage 450 mV,

(phono jacks)

impedance 47 kilohms

DVD INPUT:

FRONT IN:

voltage 450 mV,

(phono jacks)

impedance 47 kilohms

REAR IN:

voltage 450 mV,

(phono jacks)

impedance 47 kilohms

CENTER IN:

voltage 450 mV,

(phono jacks)

impedance 47 kilohms

WOOFER IN:

voltage 450 mV,

(phono jacks)

impedance 47 kilohms

MIC 1/2

Sensitivity 1 mV,

(mini jack)

impedance 10 kilohms

Outputs
MD OUT:

voltage 250 mV

(phono jacks)

impedance 1 kilohms

VIDEO OUT:

max. output level

(phono jack)

1Vp-p, unbalanced,
Sync negative, load impedance
75 ohms

S-VIDEO  OUT:

Y: 1Vp-p, unbalanced,

(4-pin/mini-DIN jack)

Sync negative,
C: 0.286Vp-p,
load impedance 75 ohms

PHONES:

accepts headphones of

(stereo mini jack)

8 ohms or more

FRONT SPEAKER:

accepts impedance of 8 to 16 ohms

REAR SPEAKER:

accepts impedance of 8 to 16 ohms

CENTER SPEAKER:

accepts impedance of 8 to 16 ohms

SUPER WOOFER:

Voltage 1 V, impedance 1 kilohms

The following measured at AC 120/220/240 V,
50/60 Hz
Front Speaker:
DIN power output (rated) 95 + 95 watts

(8 ohms at 1 kHz, DIN)

Continuous RMS power output (reference)

120 + 120 watts
(8 ohms at 1 kHz,
10% THD)

Center Speaker:
DIN power output (rated) 30 watts

(8 ohms at 1 kHz, DIN)

Continuous RMS power output (reference)

40 watts
(8 ohms at 1 kHz,
10% THD)

Rear Speaker:
DIN power output (rated) 30 + 30 watts

(8 ohms at 1 kHz, DIN)

Continuous RMS power output (reference)

40 + 40 watts
(8 ohms at 1 kHz,
10% THD)

2003K16-1

© 2003.11

2

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.

System

Compact disc and digital audio
system

Laser

Semiconductor laser
(

λ=780nm)

Emission duration:  continuous

Laser output

Max. 44.6 

µW*

*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.

Wavelength

780 — 790 nm

Frequency response

2 Hz — 20 kHz (

±0.5 dB)

Signal-to-noise ratio

More than 90 dB

Dynamic range

More than 90 dB

Video color system format

NTSC, PAL

CD OPTICAL DIGITAL OUT
(Square optical connector jack, rear panel)  
Wavelength

660 nm

Output Level

—18 dBm 

Recording system

4-track 2-channel stereo

Frequency response

40 — 13,000 Hz (

±3 dB),

(DOLBY NR OFF)

using Sony TYPE I cassette
40 — 14,000 Hz (

±3 dB),

using Sony TYPE II cassette

FM stereo, FM/AM superheterodyne tuner

Tuning range                      87.5 — 108.0 MHz (50 kHz step)
Antenna

FM lead antenna

Antenna terminals

75 ohm unbalanced

Intermediate frequency

10.7 MHz

Tuning range
Middle Eastern model:

531 — 1,602 kHz
(with the interval set at
9 kHz)

Other models:

531 — 1,602 kHz
(with the interval set at
9 kHz)
530 — 1,710 kHz
(with the interval set at
10 kHz)

Antenna

AM loop antenna

Antenna terminals

External antenna terminal

Intermediate frequency

450 kHz

Power requirements
Thai and Chinese models: 220 V AC, 50/60 Hz
Other models:

120 V, 220 V or
230 — 240 V AC, 50/60 Hz
Adjustable with voltage selector

Power consumption

250 watts

Dimensions (w/h/d)

Approx. 250 x 375 x 395 mm

Mass

Approx. 13.2 kg

Supplied accessories:

AM loop antenna (1)
FM lead antenna (1)
Remote Commander (1)
Batteries (2)
Video cable (1)
Speaker cords (5)
Front speaker pads (8)

Design and specifications are subject to change
without notice.

3

• Abbreviation

EA

: Saudi Arabia model.

SP

: Singapore model.

MY

: Malaysia model.

TH

: Thai model.

HK

: Hong Kong model.

CH

: Chinese model.

4-227-555-0s

4-227-555-1s

4-227-555-2s

4-227-555-3s

4-227-555-4s

EA

MY, SP

HK

TH

CH

·········································································· 5

································································ 8

···························································· 16

····························· 19

······························· 19

6-1. Circuit Boards Location ·············································· 24
6-2. Block Diagrams ··························································· 25
6-3. Schematic  Diagram     Video CD Section (1/2) ·········· 29
6-4. Schematic  Diagram     Video CD Section (2/2) ·········· 30
6-5. Printed  Wiring Board     Video CD Section ················ 31
6-6. Printed  Wiring Board     BD Board ···························· 32
6-7. Schematic  Diagram     BD Board ······························· 33
6-8. Printed  Wiring Boards     Sensor/Motor Section ········ 34
6-9. Schematic  Diagram     Sensor/Motor Section ············ 35
6-10. Printed  Wiring Board     Audio Board ························ 36
6-11. Schematic  Diagram      Audio Board ·························· 37
6-12. Printed  Wiring Board     Leaf SW Board ··················· 38
6-13. Schematic  Diagram     Leaf SW Board ······················ 38
6-14. Printed  Wiring Board     Main Board ························· 39
6-15. Schematic  Diagram     Main Board (1/2) ··················· 40
6-16. Schematic  Diagram     Main Board (2/2) ··················· 41
6-17. Printed  Wiring Board     Panel Board ························· 42
6-18. Schematic  Diagram     Panel Board ···························· 43
6-19. Printed  Wiring Board     Sub Panel Board ·················· 44
6-20. Schematic  Diagram     Sub Panel Board ···················· 45
6-21. Waveforms ··································································· 46
6-22. Printed  Wiring Board     Mic Board ··························· 46
6-23. Schematic  Diagram     Mic Board ······························ 47
6-24. Printed  Wiring Board     Front AMP Board ················ 48
6-25. Schematic  Diagram     Front AMP Board ·················· 49
6-26. Printed  Wiring Board     Surround AMP Board ········· 50
6-27. Schematic  Diagram     Surround AMP Board ············ 51
6-28. Printed  Wiring Boards     Trans Board ······················· 52
6-29. Schematic  Diagram     Trans Board ···························· 53
6-30. IC Block Diagrams ······················································ 54
6-31. IC Pin Function Description ········································ 56

................................................... 61

................................... 68

1.

Check the area of your repair for unsoldered or poorly-soldered
connections.  Check the entire board surface for solder splashes
and bridges.

2.

Check the interboard wiring to ensure that no wires are
"pinched" or contact high-wattage resistors.

3.

Look for unauthorized replacement parts, particularly
transistors, that were installed during a previous repair.  Point
them out to the customer and recommend their replacement.

4.

Look for parts which, through functioning, show obvious signs
of deterioration.  Point them out to the customer and
recommend their replacement.

After correcting the original service problem, perform the following safety
checks before releasing the set to the customer.

5.

Check the B+ voltage to see it is at the values specified.

6.

Flexible Circuit Board Repairing

• Keep the temperature of the 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.

4

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.

The following caution label is located inside the 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.

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,
observe 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.

• Keep the temperature of the soldering iron around 270 ˚C dur-

ing 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.

CAUTION

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

CN503

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Jig (J-2501-076-A)

Jig 
(J-2501-165-A)

Jig (J-2501-167-A)

Jig (J-2501-050-A)

CN521

CN522

CN523