Sony HCD-MD313 User manual

MINI Hi-Fi COMPONENT SYSTEM
MICROFILM
AEP Model
UK Model
E Model
SPECIFICATIONS
SERVICE MANUAL
HCD-MD313
HCD-MD313 is the amplifier, CD, MD and
tuner section in DHC-MD313.
Model Name Using Similar Mechanism HCD-T1
CD CD Mechanism Type
CDM13C-5BD19
Section Base Unit Name BU-5BD19
Optical Pick-up Name KSS-213B/K-N
Model Name Using Similar Mechanism MDS-MX1
MD MD Mechanism Type MDM-3D
Section Optical Pick-up Name KMS-260A/J1N
US and foreign patents licensed from Dolby
Laboratories Licensing Corporation.
– Continued on next page –
Amplifier section
European model:
DIN power output 25 + 25 watts (6 ohms at 1 kHz, DIN)
Continuous RMS power output
30+30 watts
(6 ohms at 1 kHz, 10% THD)
Music power output 50 +50 watts
Other models:
Peak music power output 400 watts
Continuous RMS power output
25 + 25 watts (6 ohms at 1 kHz, 10% THD)
Inputs TAPE IN (phono jacks):
voltage 250 mV/125 mV, impedance 47 kilohms
Outputs TAPE OUT (phono jacks):
voltage 250 mV impedance 1 kilohms
PHONES (stereo phone jack):
accepts headphones of 8 ohms or more.
SPEAKER: accepts impedance of 6 to 16 ohms.
CD player section
System Compact disc and digital audio system
Laser Semiconductor laser (λ= 780 nm)
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 a 7 mm aperture.
Frequency response 2 Hz – 20 kHz
MD deck section
System MiniDisc digital audio system
Laser Semiconductor laser (λ= 780 nm)
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 a 7 mm aperture.
Recording time 74 minutes max. (using MDW-74)
Sampling frequency 44.1 kHz
Frequency response 5 Hz to 20 kHz
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range 87.5 – 108.0 MHz (50 kHz step)
Aerial FM lead aerial
Aerial terminals 75 ohms unbalanced
Intermediate frequency 10.7 MHz

– 2 –
TABLE OF CONTENTS
Self-diagnosis Display..................................................... 2
1. SERVICING NOTES ............................................... 3
2. GENERAL.................................................................... 5
3. DISASSEMBLY.......................................................... 8
4. TEST MODE .............................................................. 15
5. ELECTRICAL ADJUSTMENTS
MD Section...................................................................... 19
CD Section....................................................................... 24
6. DIAGRAMS
6-1. Block Diagrams
CD Section....................................................................... 27
MD Section...................................................................... 29
Main Section.................................................................... 31
6-2. Printed Wiring Board — CD Section — ......................... 33
6-3. Schematic Diagram — CD Section — ............................ 35
6-4. Printed Wiring Boards — MD Section —....................... 39
6-5. Schematic Diagram — MD Section — ........................... 41
6-6. Schematic Diagram — Main board — ............................ 46
6-7. Printed Wiring Boards — Main Section —..................... 51
6-8. Printed Wiring Board —Audio Section — ..................... 53
6-9. Schematic Diagram — Audio Section —........................ 55
6-10. Printed Wiring Boards — Panel/Power Section — ......... 58
6-11. Schematic Diagram — Panel/Power Section — ............. 61
6-12. IC Pin Function Description ............................................ 74
7. EXPLODED VIEWS ................................................ 82
8. ELECTRICAL PARTS LIST................................ 88
AM tuner section
Tuning range
European model:
MW: 522 – 1,611 kHz
(with the interval set at 9 kHz)
LW: 144 – 288 kHz
(with the interval set at 3 kHz)
Other models:
MW: 531–1,602 kHz
(with the interval set at 9 kHz)
SW: 5.95 – 17.90 MHz
(with the interval set at 10 kHz)
General
Power requirements
European model: 220 – 230 V AC, 50/60 Hz
Other models: 110 – 120 V or 220 – 240 V AC, 50/60 Hz
Power consumption: 80 watts
Dimensions
Amplifier/Tuner/MD/CD section:
Approx. 215 ×148 ×320 mm (w/h/d)
incl. projecting parts and controls
Mass
Amplifier/Tuner/MD/CD section:
Approx. 5.5 kg
Supplied accessories: Remote RM-MD313 (1)
Sony batteries (2)
AM loop aerial (1)
FM lead aerial (1)
WARRANTY CARD (1)
Design and specifications are subject to change without notice.
Self-diagnosis Display

– 3 –
SECTION 1
SERVICING NOTES
MODEL IDENTIFICATION
— BACK PANEL —
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK !OR DOTTED
LINE WITH MARK !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.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
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.
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 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.
CAUTION
Use of controls or adjustments or performance of proce-
dures other than those specified herein may result in haz-
ardous radiation exposure.
Laser component in this product is capable of emitting radiation
exceding the limit for Class 1.
Thisapplianceisclassifiedas
a CLASS 1 LASER product.
TheCLASS1LASERPROD-
UCT MARKING is located on
the rear exterior.
This caution la-
bel is located in-
side the unit.
Parts No.
MODEL PARTS No.
AEP, UK, German,
AED model 4-993-849-1π
Hong Kong, Malaysia,
Singapore model 4-993-849-2π
Note:
Be sure to connect all wires (including FFC) in the MD
section before applying power or ICs may be damaged.
• Abbreviation
AED: North European

– 4 –
DISC TABLE GETTING OUT PROCEDURE ON
THE POWER SUPPLY IS OFF
1. Insert the tweezers to a hole on bottom of the chassis as shown
a figure, then tern fully it toward direction 2.
2. Pull out the disc table.
disc table
cam
1 tweezers
2
3
FLUORESCENT INDICATOR TUBE/BUTTONS/JOG/
LEDs CHECK MODE
1. Presstwobuttons PLAY MODE and p(MD) simulatneously
for standby status.
2. Fluorescent indicator tube and LEDs are all turned on.
Press FUNCTION button, the fluorescent indicator tube dis-
plays pattern change to cycle.
Turning the VOLUME knob, and the each LED turned on to
order.
3. Press p(CD) button, and the Key check mode.
4. The fluorescent indicator tube displays “KEY=0 JOG=0”.
Each time a button is pressed, “KEY”=value increases.
Howerer, once a button is pressed, it is no longer taken into
account.
“JOG=” value increases like 1, 2, 3... if rotating VOLUME
knob in clock width, or it decreases like 0, 9, 8... if rotating in
cunter clock width.
5. To exit from this mode, press order all buttons (15 buttons), the
displays “KEY=OK”, and press any button, or disconnect the
power cord.
SUB CLOCK CHECK
1. Connect an oscilloscope to IC601 pin (¡ and ground of the
MAIN board.
2. Press two buttons PLAY MODE and §(MD)
Simultaneously, and the fluorescent indicator tube displays
“32.768 kHz (91)”.
3. To check the signal on oscilloscope becomes 32 kHz square
wave.
4. Press POWER button to exit.
TA CHECK
1. Press POWER button and system power On.
2. Press two buttons PLAY MODE and p(CD)
simultaneously, the fluorescent indicator tube displays “TA
Test”.
3. Rotation VOLUME knob in clock width a little, the fluores-
cent indicator tube displays “Volume MAX”.
Rotation VOLUME knob in cunterclock widh a little, the fluo-
rescent indicator tube displays “Volume MIN”.
4. Press CD-MD SYNC button, the fluorescent indicator tube
displays “BASS/TRE MAX”. Press REPEAT button, the fluo-
rescent indicator tube displays “BASS/TRE MIN”. Press
p(MD) button, the fluorescent indicator tube displays “ALL
FLAT”. Press p(CD) button, the fluorescent indicator tube
displays “SURROUND = ON”.
5. Press POWER button to exit, and system power off.

– 5 –
SECTION 2
GENERAL
1POWER button
2MD disk slot
3§(MD) button
4^(MD) button
5p(MD) button
6VOLUME control knob
7^(CD) button
8p(CD) button
9FUNCTION button
!º Fluorescent indicator tube
!¡ CD disc tray
!™ PHONES jack
!£ PLAY MODE • TUNING MODE button
!¢ REPEAT • STEREO/MONO button
!∞ §(CD) button
!§ TUNER/BAND button
!¶ CD-MD SYNC button
!• rREC button
!ª MD/CD =0• TUNER – button
@º MD/CD )+• TUNER + button
1TAPE OUTPUT pin jack
2TAPE INPUT pin jack
3AU BUS jack
4SPEAKER terminal
5VOLTAGE SELECTOR switch
(Except European models)
6AM ANTENNA terminal
7FM ANTENNA terminal
8SIGNAL GND terminal
LOCATION OF CNTROLS
– Front Panel –
– Rear Panel –
12345
6
7
8
9
@º!ª!•!¶!§!∞!¢!£!™
!º
!¡
123 4
5
6
7
8
Europian model
other models

– 6 –
– Remote controller – 1POWER button
2DBFB button
3MUSIC MENU button
4SCROLL button
5BAND button
6MD Pbutton
7MD pbutton
8MD +button
9CD Pbutton
!º CD pbutton
!¡ LOOP button
!™ CD +button
!£ TAPE pbutton
!¢ TAPE Pbutton
!∞ TAPE )button
!§ CLOCK/TIMER SET, button
!¶ DISPLAY button
!• + button
!ª VOL + button
@º VOL – button
@¡ SLEEP button
@™ FUNCTION button
@£ REPEAT button
@¢ PLAY MODE button
@∞ PRESET + buuton
@§ PRESET – button
@¶ MD (button
@• MD =button
@ª CD (button
#º CD =button
#¡ TAPE 9button
#™ TAPE (button
#£ TAPE 0button
#¢ CLOCK/TIMER SELECT button
#∞ EDIT button
#§ – button
#¶ CURSOR ?button
#• CURSOR /button
#ª ENTER/YES button
$º CANCEL/NO button
1
2
3
4
5
6
7
8
9
!º
!¡
!™
!£
!¢
!∞
!§
!¶
!•
!ª
@º
@¡
@™
@£
@¢
@∞
@§
@¶
@•
@ª
#º
#¡
#™
#£
#∞
#§
#¶
#•
#ª
$º
#¢

– 7 –

– 8 –
Note: Follow the disassembly procedure in the numerical order given.
CASE
SECTION 3
DISASSEMBLY
FRONT PANEL/MD MECHANISM DECK SECTION
1 two screws
(case 3 TP2)
2 case
1 two screws
(case 3 TP2)
7 six screws (BVTT 3 × 6)
8 MD mechanism section
5 front panel section
1 two screws
(BVTP 3 × 8)
2 wire (flat type) (23 core)
(CN873)
4 claw
3 connector
(CN490)
6 wire (flat type) (25 core)
(CN820)

– 9 –
BACK PANEL, JACK BOARD
MD MECHANISM DECK (MDM-3D)
7 JACK board
6 wire (flat type) (15 core)
(CN401)
1 connector
(CN590)
8 connector
(CN402)
4 five claws
5 back panel
3 screw
(BVTP 3 × 8)
2 four screws
(BVTP 3 × 10)
1 two screws
(BVTT 2 × 3)
2 MD mechanism deck
(MDM-3D)
1 two screws
(BVTT 2 × 3)
bracket (MD)
2 screw
(BVTP 3 × 10)

– 10 –
CD MECHANISM DECK (CDM13C-5BD19)
BD (MD) BOARD
4 bracket (CD)
3 two screws
(BVTP 3 × 6)
3 two screws
(BVTP 3 × 6)
1 wire (flat type) (19 core)
(CN801)
2 connector
(CN291)
5 two screws
(BVTP 3 × 8)
7 CD mechanism deck
(CDM13C-5BD19)
6 two hooks
3 wire (flat type) (14 core)
(CN106)
5 OP relay flexible board
(CN101)
6 BD (MD) board
4 screw
(BVTP 2 × 4)
1 wire (flat type) (25 core)
(CN107)
2 flexible board
(over write head)
(CN104)