HCD-MG110, HCD-MG310AV, MHC-MG110, MHC-MG310AV — Sony Audio Service Manual (repair manual)

Model
HCD-MG110 HCD-MG310AV MHC-MG110 MHC-MG310AV
Pages
72
Size
7.65 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
hcd-mg110-hcd-mg310av-mhc-mg110-mhc-mg310av.pdf
Date

View Sony HCD-MG110 / HCD-MG310AV / MHC-MG110 / MHC-MG310AV Service Manual online

SERVICE MANUAL
HC D-MG310AV only
This stereo system is equipped with the Dolby* Pro Logic
Surround decoder.
* Manufactured under license from Dolby Laboratories.
Dolby ,  Pro Logic , and the double-D symbol 
; are
trademarks of Dolby Laboratories. Confidential
unpublished works. '1992-1997 Dolby Laboratories.
All rights reserved.
Amplifier section
U.S.A. models:
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:
with 8 ohm loads both channels driven, from
120 – 10,000 Hz; rated 75 watts per channel
minimum RMS power, with no more than 10%
total harmonic distortion from 250 milliwatts to
rated output.
MHC-MG310AV
Front speaker:
Continuous RMS power output
75 + 75 watts
(8 ohms at 1 kHz,
10% THD)
Total harmonic distortion less than 0.09%
(8 ohms at 1 kHz,
40 watts)
Center speaker:
Continuous RMS power output
25 watts
(8 ohms at 1 kHz,
10% THD)
Rear speaker:
Continuous RMS power output
25 + 25 watts
(8 ohms at 1 kHz,
10% THD)
MHC-MG110
Continuous RMS power output
75 + 75 watts
(8 ohms at 1 kHz,
10% THD)
Total harmonic distortion less than 0.09%
(8 ohms at 1 kHz,
40 watts)
Inputs
VIDEO/MD IN (phono jacks):
voltage 250 mV/450 mV,
impedance 47 kilohms
5.1CH (MG310AV only):
FRONT (phono jacks):
voltage 450 mV,
impedance 47 kilohms
REAR (phono jacks):
voltage 450 mV,
impedance 47 kilohms
CENTER (phono jack):
voltage 450 mV,
impedance 47 kilohms
SUB WOOFER (phono jack):
voltage 450 mV,
impedance 47 kilohms
Outputs
PHONES (stereo phone jack):
accepts headphones of
8 ohms or more
FRONT SPEAKER:
accepts impedance of 8 to
16 ohms (except for the US, 
SURROUND SPEAKER REAR 
(MG310AV only):
accepts impedance of 8 to
16 ohms (except for the US,
Cnadian and Mexican model)
SURROUND SPEAKER SUB WOOFER
(MHC-MG510AV only): accepts impedance of
8 ohms (except for the
North American model)
SUB WOOFER (MHC-MG310AV only):
voltage 1 V,
impedance 1 kilohm
CD player section
System
Compact disc and digital
audio system
Laser
Semiconductor laser
( = 780 nm)
Emission duration:
continuous
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
OPTICAL OUT (CD)
(Square optical connector jack, rear panel)
Wavelength
660 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
Cnadian and Mexican model)
US Model
Canadian Model
HCD-MG110/MG310AV
Mexican Model
HCD-MG110
Australian Model
HCD-MG310AV
HCD-MG110/MG310AV
Ver 1.3  2002.05
9-873-801-14
Sony Corporation
2002E0500-1
Home Audio Company
C
 2002.05
Published by Sony Engineering Corporation
COMPACT DISC DECK RECEIVER
SPECIFICATIONS
HCD-MG110/MG310AV are the Amplifier, CD player, Tape
Deck and Tuner section in MHC-MG110/MG310AV.
– Continued on next page –
Model Name Using Similar Mechanism
NEW
CD
CD Mechanism Type
CDM64-K1BD44A
Section
Base Unit Name
BU-K1BD44A
Optical Pick-up Name
KSM-213BFN
TAPE
Model Name Using Similar Mechanism
NEW
Section
Tape Transport Mechanism Type
CM8L6Z511A
Photo: HCD-MG110
2
HCD-MG110/MG310AV
TABLE  OF  CONTENTS
FM tuner section
Tuning range
87.5 – 108.0 MHz
Antenna
FM lead antenna
Antenna terminals
North American model:
75 ohms unbalanced
Australian model:
75 ohms balanced
Intermediate frequency
10.7 MHz
AM tuner section
Tuning range
US, Canadian and Mexican model:
530 – 1,710 kHz
(with the interval set at
10 kHz)
531 – 1,710 kHz
(with the interval set at
9 kHz)
Australian model:
531 – 1,602 kHz
(with the interval set at
9 kHz)
Antenna
AM loop antenna
Antenna terminals
External antenna terminal
Intermediate frequency
450 kHz
General
Power requirements
US, Canadian and Mexican model:
120 V AC, 60 Hz
Australian model:
220 – 240 V AC,
50/60 Hz
Power consumption
US, Canadian and Mexican model
MHC-MG310AV:
200 watts
MHC-MG110:
150 watts
Australian model
MHC-MG310AV:
200 watts
Dimensions (w/h/d) incl. projecting parts and controls
Approx. 280 
×
 383 
×
 480
mm
Mass
MHC-MG310AV:
Approx. 11.3 kg
MHC-MG110:
Approx. 10.9 kg
Supplied accessories:
Remote commander (1)
Batteries (2)
AM loop antenna (1)
FM lead antenna (1)
Rear speaker cords
(MG310AV only) (2)
Center speaker pads
(attached to the backside
of the center speaker)
(MG310AV only) (2)
Video cable (Australian
model only) (1)
Design and specifications are subject to change
without notice.
1.
SERVICING  NOTE
..................................................
4
2.
GENERAL
...................................................................
5
3.
DISASSEMBLY
3-1. Disassembly Flow ...........................................................
7
3-2. Upper Cover ....................................................................
8
3-3. Front Block Assy .............................................................
8
3-4. MAIN Board ...................................................................
9
3-5. Back Panel, DC Fan (M391) (Australian model) ...........
9
3-6. MAIN AMP Board, POWER Board ............................... 10
3-7. Middle (F) Assy, Bracket (Middle-R),
Power Bracket ................................................................. 10
3-8. Mechanism Deck (CDM64-K1BD44A) ......................... 11
3-9. Base Unit (BU-K1BD44A) ............................................. 11
3-10. BU Holder Assy .............................................................. 12
3-11. Motor Gear Assy (Sled) (M102), CD Board .................. 12
3-12. Op Base Assy (KSM-213BFN) ...................................... 13
3-13. Cassette Lid Assy (A)/(B) ............................................... 13
3-14. Mech Deck (TAPE) ......................................................... 14
4.
TEST  MODE
.............................................................. 15
5.
MECHANICAL  ADJUSTMENTS
....................... 16
6.
ELECTRICAL  ADJUSTMENTS
Deck Section ............................................................................. 16
CD Section ................................................................................ 18
7.
DIAGRAMS
7-1. Block Diagram – CD SERVO Section – ........................ 21
7-2. Block Diagram – TUNER/TAPE DECK Section  – ...... 22
7-3. Block Diagram – SURROUND Section – ...................... 23
7-4. Block Diagram – AMP Section – ................................... 24
7-5. Block Diagram
– DISPLAY/POWER SUPPLY Section – ...................... 25
7-6. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 26
7-7. Schematic Diagram – CD Section – ............................... 28
7-8. Printed Wiring Board – CD Section – ............................ 29
7-9. Printed Wiring Boards
– CD MOTOR/SENSOR Section – ................................ 30
7-10. Schematic Diagram
– CD MOTOR/SENSOR Section – ................................ 31
7-11. Printed Wiring Board – TC Section – ............................. 32
7-12. Schematic Diagram – TC Section – ............................... 33
7-13. Schematic Diagram – MAIN Section (1/4) – ................. 34
7-14. Schematic Diagram – MAIN Section (2/4) – ................. 35
7-15. Schematic Diagram – MAIN Section (3/4) – ................. 36
7-16. Schematic Diagram – MAIN Section (4/4) – ................. 37
7-17. Printed Wiring Board – MAIN Section – ....................... 38
7-18. Printed Wiring Boards – AMP Section – ........................ 40
7-19. Schematic Diagram – AMP Section – ............................ 41
7-20. Printed Wiring Boards – DISPLAY Section – ............... 42
7-21. Schematic Diagram – DISPLAY Section – .................... 43
7-22. Printed Wiring Board – CONTROL Section – ............... 44
7-23. Schematic Diagram – CONTROL Section – .................. 45
7-24. Printed Wiring Boards – POWER Section – .................. 46
7-25. Schematic Diagram – POWER Section – ...................... 47
7-26. IC Pin Function Description ........................................... 48
8.
EXPLODED  VIEWS
8-1. General Section ............................................................... 54
8-2. Front Panel Section ......................................................... 55
8-3. Chassis Section ............................................................... 56
8-4. Mechanism Deck Section (CDM64-K1BD44A) ........... 57
8-5. Base Unit Section (BU-K1BD44A) ............................... 58
9.
ELECTRICAL  PARTS  LIST
............................... 59
Ver 1.3
3
HCD-MG110/MG310AV
Fig. A.
Using an AC voltmeter to check AC leakage.
1.5 k
0.15 
µ
F
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
SAFETY  CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety check 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  TEST
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 microamperes.).
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” indica-
tion is 0.75 V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-
amples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2 V AC range are
suitable.  (See Fig. A)
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
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.
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  PUB-
LISHED  BY  SONY.
The laser diode in the optical pick-up block may suffer electro-
static 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 emis-
sion, 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 waveforms is output three times.
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 dam-
aged by heat.
Flexible Circuit Board Repairing
• 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.
Ver 1.1
ATTENTION  AU  COMPOSANT  AYANT  RAPPORT
À  LA  SÉCURITÉ!
LES  COMPOSANTS  IDENTIFIÉS  PAR  UNE  MARQUE  
0
SUR  LES  DIAGRAMMES  SCHÉMATIQUES  ET  LA  LISTE
DES  PIÈCES  SONT  CRITIQUES  POUR  LA  SÉCURITÉ
DE  FONCTIONNEMENT.  NE  REMPLACER  CES  COM-
POSANTS  QUE  PAR  DES  PIÈCES  SONY  DONT  LES
NUMÉROS  SONT  DONNÉS  DANS  CE  MANUEL  OU
DANS  LES  SUPPLÉMENTS  PUBLIÉS  PAR  SONY.
4
HCD-MG110/MG310AV
SECTION  1
SERVICING  NOTES
CD-TEXT TEST  DISC
This unit is able to display the test data (character information)
written in the CD on its fluorescent indicator tube.
The CD-TEXT TEST DISC (TGCS-313:4-989-366-01) is used
for checking the display.
To check, perform the following procedure.
Checking Method:
1. Press the
I/1
button to turn the power on, set the disc to the
disc table with the “test disc” label facing up, and chuck the
disc.
2. Press the 
[CD]
 button to set CD function, and press the
n N
button
to playback the disc.
3. The following will be displayed on the liquid crystal display.
Display : 1KHZ/0DB/L R
4. Pressing the 
[--       ]
 or 
[       +]
 button, select the track. The text
data of each track will be displayed.
For details of the displayed contents for each track, refer to “Table
1: CD-TEXT TEST DISC TEXT Data Contents”.
Restrictions in CD-TEXT Display
In this unit, some special characters will not be displayed prop-
erly. These will be displayed as a space or a character resembling
it.
Table 1: CD-TEXT TEST DISC TEXT Data Contents
(TRACKS No. 1 to 20:Normal Characters)
1
1kHz/0dB/L&R
2
20Hz/0dB/L&R
3
40Hz/0dB/L&R
4
100Hz/0dB/L&R
5
200Hz/0dB/L&R
6
500Hz/0dB/L&R
7
1kHz/0dB/L&R
8
5kHz/0dB/L&R
9
7kHz/0dB/L&R
10
10kHz/0dB/L&R
11
16kHz/0dB/L&R
12
18kHz/0dB/L&R
13
20kHz/0dB/L&R
14
1kHz/0dB/L&R
15
1kHz/–1dB/L&R
16
1kHz/–3dB/L&R
17
1kHz/–6dB/L&R
18
1kHz/–10dB/L&R
19
1kHz/–20dB/L&R
20
1kHz/–60dB/L&R
TRACK
No.
Displayed Contents
Note:
 Track No. 21 to 99 are not displayed.
.
>
CLEANING  OBJECTIVE  LENS  OF  OPTICAL  PICK-UP
• In cleaning the objective lens of optical pick-up, be sure the
following below.
(Figure A)
Note 1.
In cleaning the lens, do not apply an excessive force.
As the optical pick-up is vulnerable, application of excessive
force could damage the lens holder.
Note 2.
In cleaning, do not use a cleaner other than exclusive cleaning
liquid (KK-91 or isopropyl alcohol).
Note 3.
Wipe the objective lens spirally from center toward outside. (See
Figure A)
2
Remove the 
magnet assy.
1
Open the torsion holder 
(magnet) in direction of 
arrow 
A.
A
optical pick-up
bracket (top 60) hole
3
Put a cotton bud into 
the hole on the bracket 
(top 60) and clean the 
OP lens.
Ver 1.3
MODEL  IDENTIFICATION
– REAR  VIEW –
MODEL NO.
HCD-MG
[][][][][]
COMPACT DISC DECK RECEIVER
MADE IN CHINA
US, Canadian and Mexican models: AC: 120V 60Hz
Australian Model: AC: 220–240V
-50/60Hz
5
HCD-MG110/MG310AV
SECTION  2
GENERAL
This section is extracted from
instruction manual.
Parts Identification
5.1CH/VIDEO (MD)* 5
AUDIO IN L jack wk
AUDIO IN R jack wj
CD 5 (14, 21)
CD SYNCHRO wh 
CLEAR w;
Deck A es 
Deck B 0 
DIRECTION ea
DISC ACCESS ql
Display window 4
DISPLAY wd
ENTER qk
FRONT* qd
GAME e;
KEYBOARD INPUT jack ws
LINK* qg
MENU ea
PHONES jack wa
PLAY MODE wf
PRESET EQ 7
PRO LOGIC* qs
PUSH OPEN (Front cover) qj
REAR* qf
REC PAUSE/START  wh
REPEAT wg
STEREO/MONO wg
SURROUND* qa
SURROUND MODE 8
TAPE A/B 5
TIMER SELECT 3
TIMER SET 3
TUNER/BAND 5 
VIDEO IN jack wl 
VIDEO (MD)** 5
VOLUME control qh
Z (deck A) 1
=/1 (power) 2
m (rewind) 6
n N (play) 6
X PAUSE  6
M (fast forward) 6
x (stop) 6
– . (go back) 6
> + (go forward) 6
Z (deck B) 9
* MG310AV only
** MHC-MG110 only
The items are arranged in alphabetical order.
Main unit
1
es
ea
e;
wl
wk
wj
wh
wg
wf
wd
ws
wa
2 3 4
56 7 8
9
qs
w; ql
qd
0
qa
qf
qg
qh
qj
qk

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Here you can view online or download Sony HCD-MG110 / HCD-MG310AV / MHC-MG110 / MHC-MG310AV Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair Sony HCD-MG110 / HCD-MG310AV / MHC-MG110 / MHC-MG310AV Audio. Information contained in Sony HCD-MG110 / HCD-MG310AV / MHC-MG110 / MHC-MG310AV service manual (repair manual) typically includes:

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  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).