background image
HCD-M100/M300AV
SERVICE MANUAL
HCD-M100/M300AV is the tuner, deck, CD and
amplifier section in MHC-M100/M300AV.
SPECIFICATIONS
COMPACT COMPONENT SYSTEM
-- Continued on next page --
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
Amplifier section
U.S.A models:
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC DISTORTION:
With 6
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
at 1 kHz, 10% THD)
Total harmonic distortion
less than 0.09%
(6
at 1 kHz, 40 W)
Center Speaker:
Continuous RMS power output
35 W
(6
at 1 kHz. 10% THD)
Rear Speaker:
Continuous RMS power output
17.5 + 17.5 W
(12
at 1 kHz, 10% THD)
MHC-M100
Continuous RMS power output
75 + 75 W
(6
at 1 kHz, 10% THD)
Total harmonic distortion
less than 0.09%
(6
at 1 kHz, 40 W)
Inputs
VIDEO/MD IN (phono jack):
voltage 250 mV/450 mV,
impedance 47 k
Outputs
PHONES (stereo phone jacks):
accepts headphones of 8
or more
FRONT SPEAKER: accepts impedance of 6 to 16
REAR SPEAKER: (M300AV only):
MHC-M300AV
accepts impedance of 12 to 16
CENTER SPEAKER: (M300AV only):
accepts impedance of 6
SUPER WOOFER: (M300AV only):
voltage 1 V, impedance 1 k
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
Ver 1.
1 2001. 07
9-929-271-12
2001G0200-1
© 2001.7
Sony Corporation
Home Audio Company
Shinagawa Tec Service Manual Production Group


background image
2
CD player section
System
Compact disc and digital audio system
Laser
Semiconductor laser (
=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
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.


background image
3
SAFETY-RELATED COMPONENT WARNING!!
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.
SAFETY CHECK-OUT
(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.
LEAKAGE
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)
Fig. A. Using an AC voltmeter to check AC leakage.
0.15
µF
To Exposed Metal
Parts on Set
1.5k
AC
voltmeter
(0.75V)
Earth Ground


background image
4
TABLE OF CONTENTS
1. GENERAL
Font Panel ··············································································· 5
Rear Panel ·············································································· 6
2. DISASSEMBLY ······························································· 8
3. TEST MODE ··································································· 16
4. MECHANICAL ADJUSTMENTS ···························· 18
5. ELECTRICAL ADJUSTMENTS
Deck Section ········································································ 21
CD Section ··········································································· 23
6. DIAGRAMS
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
7. EXPLODED VIEWS ····················································· 60
8. ELECTRICAL PARTS LIST ····································· 67
SERVICING NOTES
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.
NOTES ON LASER DIODE EMISSION CHECK
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.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
Carry out the "S curve check" in "CD section adjustment" and check
that the S curve waveform is output repeatedly.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
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.


background image
5
SECTION 1
GENERAL
FRONT PANEL
1
@/1 button
2
STANDBY indicator
3
MEMO INPUT button
4
MEMO SCAN button
5
MEMO SEARCH button
6
TAPE A h button and indicator
7
CD 7 button and indicator
8
TAPE A H button and indicator
9
Display window
0
x (STOP) button
qa
TAPE B h button and indicator
qs
TUNER/BAND button
qd
TAPE B H button and indicator
qf
CHECK button
qg
CLEAR button
qh
DELETE button
qj
GROOVE button and indicator
qk
FUNCTION button
ql
DSP button and indicator
w;
DBFB button
wa
CONTINUE/STEREO/MONO button
ws
ENTER button
wd
PROGRAM/TUNER MEMORY button
wf
SHUFFLE/DIRECTION button
wg
+ M > button
wh
m .­ button
wj
SELECTOR dial
wk
PHONES jack
wl
FILE SELECT button
e;
VOLUME knob
ea
X PAUSE button and indicator
es
CD SYNCHRO button
ed
z REC button
ef
CD PLUS ONE button
eg
TIMER SELECT button and indicator
eh
CLOCK TIMER SET button
ej
DISPLAY button
ek
PROLOGIC button and indicator
(HCD-M300AV only)
1
ef
eg
eh
ej
ek
2
3
4
5
678 90 qaqsqd qfqgqh
qj
qk
w;
wa
ws
wd
wf
wg
wh
wj
wk
wl
e;
ea
es
ed
ql
Photo: HCD-M300AV