DOWNLOAD Sony HCD-M100 / HCD-M300AV Service Manual ↓ Size: 7.55 MB | Pages: 81 in PDF or view online for FREE

HCD-M100/M300AV is the tuner, deck, CD and
amplifier section in MHC-M100/M300AV.

Model Name Using Similar Mechanism

HCD-MC3AV

CD Mechanism Type

CDM-46B1

Optical Pick-up Name

KSM-213BFN/C2NP

Model Name Using Similar Mechanism

NEW

Tape Transport Mechanism Type

TCM-230AWR21

CD

SECTION

TAPE DECK

SECTION

US Model

AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC DISTORTION:
With 6 

Ω loads both channels driven, from 120 – 10,000 Hz; rated 75 W per

channel minimum RMS power, with no more than 10% total harmonic
distortion from 250 mW to rated output.

MHC-M300AV
Front Speaker:
Continuous RMS power output

75 + 75 W
(6 

Ω at 1 kHz, 10% THD)

Total harmonic distortion

less than 0.09%
(6 

Ω at 1 kHz, 40 W)

Center Speaker:
Continuous RMS power output

35 W
(6 

Ω at 1 kHz. 10% THD)

Rear Speaker:
Continuous RMS power output

17.5 + 17.5 W
(12 

Ω at 1 kHz, 10% THD)

MHC-M100
Continuous RMS power output

75 + 75 W
(6 

Ω at 1 kHz, 10% THD)

Total harmonic distortion

less than 0.09%
(6 

Ω at 1 kHz, 40 W)

Inputs
VIDEO/MD IN (phono jack):

voltage 250 mV/450 mV,
impedance 47 k

Ω

Outputs
PHONES (stereo phone jacks):

accepts headphones of 8 

Ω or more

FRONT SPEAKER: accepts impedance of 6 to 16 

Ω

REAR SPEAKER: (M300AV only):
MHC-M300AV

accepts impedance of 12 to 16 

Ω

CENTER SPEAKER: (M300AV only):

accepts impedance of 6 

Ω

SUPER WOOFER: (M300AV only):

voltage 1 V, impedance 1 k

Ω

Manufactured under license from Dolby
Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol ; and
“PRO LOGIC” are trademarks of Dolby
Laboratories Licensing Corporation.

Photo: HCD-M300AV

2001

G

0200-1

© 2001.

7

2

CD player section
System

Compact disc and digital audio system

Laser

Semiconductor laser (

λ =780 mm)

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.

Frequency response

2 Hz – 20 kHz (± 0.5 dB)

Wavelength

780 – 790 nm

Signal-to-noise ratio

More than 90 dB

Dynamic range

More than 90 dB

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

600 nm

Output level

–18 dBm

Tape player section
Recording system

4-track 2-channel stereo

Frequency response

40 – 13,000 Hz (± 3 dB),
using Sony TYPE I cassette

Tuner section
FM stereo, FM/AM superheterodyne tuner

FM tuner section
Tuning range

87.5 – 108.0 MHz

Antenna

FM lead antenna

Antenna terminals

75 

Ω unbalanced

Intermediate frequency

10.7 MHz

AM tuner section
Tuning range

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

Antenna

AM loop antenna

Antenna terminals

External antenna terminal

Intermediate frequency

450 kHz

General
Power requirements

120 V AC, 60 Hz

Power consumption
MHC-M300AV:

190 W

MHC-M100:

150 W

Dimensions (w/h/d)

Approx. 280 

× 373 × 468 mm

Mass
MHC-M300AV:

Approx. 10.9 kg

MHC-M100:

Approx. 10.5 kg

Supplied accessories:

AM loop antenna (1)
Remote commander (1)
Batteries (2)
FM lead antenna (1)
Speaker cords (for MHC-M300AV only) (2)
Center speaker pads (for MHC-M300AV
only) (4)

Design and specifications are subject to change without notice.

3

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.

This appliance is classified as a CLASS 1 LASER product. The
CLASS 1 LASER PRODUCT MARKING is located on the rear
exterior.

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

Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.

(US model only)

    After correcting the original service problem, perform the
following safety checks before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs, screws,
and all other exposed metal parts for AC leakage. Check leakage as
described below.

    The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microampers).
Leakage current can be measured by any one of three methods.

1.

A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instruments.

2.

A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.

3.

Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC voltmeter. The “limit” indication
is 0.75 V, so analog meters must have an accurate low-voltage
scale. The Simpson 250 and Sanwa SH-63Trd are examples of
a passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2V AC range are suitable. (See
Fig. A)

µF

Ω

4

Font Panel ··············································································· 5
Rear Panel ·············································································· 6

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

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

···························· 18

Deck Section ········································································ 21
CD Section ··········································································· 23

6-1.

Block Diagram – CD Section – ········································ 24
Block Diagram – Main Section – ····································· 25
Block Diagram – Audio Section – ···································· 26

6-2.

Circuit Boards Location ··················································· 27

6-3.

Printed Wiring Board – BD Section – ······························ 28

6-4.

Schematic Diagram – BD Section – ································· 29

6-5.

Printed Wiring Board – CD Motor Section – ··················· 30

6-6.

Schematic Diagram – CD Motor Section – ······················ 31

6-7.

Printed Wiring Board – Audio Section – ·························· 32

6-8.

Schematic Diagram – Audio Section – ····························· 33

6-9.

Printed Wiring Board – Main Section – ··························· 34

6-10. Schematic Diagram – Main (1/6) Section – ····················· 35
6-11. Schematic Diagram – Main (2/6) Section – ····················· 36
6-12. Schematic Diagram – Main (3/6) Section – ····················· 37
6-13. Schematic Diagram – Main (4/6) Section – ····················· 38
6-14. Schematic Diagram – Main (5/6) Section – ····················· 39
6-15. Schematic Diagram – Main (6/6) Section – ····················· 40
6-16. Printed Wiring Board – Power Section – ························· 41
6-17. Schematic Diagram – Power Section – ···························· 41
6-18. Printed Wiring Board – Panel Section – ··························· 42
6-19. Schematic Diagram – Panel Section – ····························· 43
6-20. Printed Wiring Board – Front Amp Section – ·················· 44
6-21. Schematic Diagram – Front Amp Section – ····················· 45
6-22. Schematic Diagram – Rear Amp Section – ······················ 46
6-23. Printed Wiring Board – Rear Amp Section – ··················· 47
6-24. Waveforms ········································································ 48
6-25. IC Pin Function Description ············································· 48
6-26. IC Block Diagrams ··························································· 56

····················································· 60

····································· 67

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.

Carry out the “S curve check” in “CD section adjustment” and check
that the S curve waveform is output repeatedly.

Notes on chip component replacement
• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be damaged

by heat.

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.