HCD-M70 - Sony Audio Service Manual (repair manual)

Model
HCD-M70
Pages
53
Size
4.13 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
hcd-m70.pdf
Date

View Sony HCD-M70 Service Manual online

SERVICE MANUAL
Tape player section
Recording system
4-track 2-channel stereo
Frequency response
50 - 13,000 Hz (
±3 dB),
using a Sony TYPE I
cassette
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range
North American model:
87.5 - 108.0 MHz
(100-kHz step)
Other models:
87.5 - 108.0 MHz
(50-kHz step)
Antenna
FM wire antenna
Antenna terminals
75 ohms unbalanced
Intermediate frequency
10.7 MHz
AM tuner section
Tuning range
Pan-American model:
530 - 1,710 kHz
(with the tuning interval
set at 10 kHz)
531 - 1,710 kHz
(with the tuning interval
set at 9 kHz)
European model:
531 - 1,602 kHz
(with the tuning interval
set at 9 kHz)
Amplifier section
For the U.S. model
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:
With 6-ohm loads, both channels driven, from
70 - 20,000 Hz; rated 18 watts per channel
minimum RMS power, with no more than 0.9%
total harmonic distortion from 250 milliwatts to
rated output.
North American model:
Continuous RMS power output (reference):
20 + 20 W
(6 ohms at 1 kHz, 10%
THD)
Total harmonic distortion less than 0.07% (6 ohms at
1 kHz, 12 W)
European model:
DIN power output (rated): 15 + 15 W
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):
20 + 20 W
(6 ohms at 1 kHz, 10%
THD)
Music power output (reference):
40 + 40 W
DIN power output (rated): 15 + 15 W
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):
18 + 18 W
(6 ohms at 1 kHz, 10%
THD)
The following measured at 220 V AC, 60 Hz
DIN power output (rated): 12 + 12 W
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):
15 + 15 W
(6 ohms at 1 kHz, 10%
THD)
Inputs
AUDIO IN MD (VIDEO) (phono jacks):
Sensitivity 500/250 mV,
impedance 47 kilohms
Outputs
OPTICAL DIGITAL OUT (CD):
Optical
PHONES:
Accepts headphones with
an impedance of  8 ohms
or more
SPEAKER:
6 ohms
Other models:
The following measured at 230 V AC, 60 Hz
CD player section
System
Compact disc and digital
audio system
Laser
Semiconductor laser
(
λ = 780 nm)
Emission
duration: continuous
Wavelength
780 - 790 nm
Frequency response
2 Hz - 20 kHz (
±0.5 dB)
MICRO Hi-Fi COMPONENT SYSTEM
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
SPECIFICATIONS
HCD-M70
Ver. 1.3  2005.03
9-873-633-04
Sony Corporation
2005C05-1
Personal Audio Group
© 2005.03
Published by Sony Engineering Corporation
HCD-M70 is the Amplifier, CD player, Tape
Deck and Tuner section in CMT-M70/M70K.
– Continued on next page –
CD
Model Name Using Similar Mechanism
HCD-CP100
Section
CD Mechanism Type
CDM55F-K6BD41A
Optical Pick-up Name
KSS-213DCP
TAPE
Model Name Using Similar Mechanism
NEW
Section
2
HCD-M70
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” 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 pas-
sive VOM that is suitable. Nearly all battery operated digital
multimeters that have a 2 V AC range are suitable.  (See Fig. A)
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
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.
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.
General
Power requirements
North American model:
120 V AC, 60 Hz
European model:
230 V AC, 50/60 Hz
Mexican model:
120 V AC, 60 Hz
Australian model:
230 V AC, 50/60 Hz
Thailand model:
220 V AC, 50/60 Hz
Other models:
110 - 120 V or 220 -
240 V AC, 50/60 Hz
Adjustable with voltage
selector
Power consumption
European model:
See the nameplate
0.5 W (in the standby
mode)
Other models:
See the nameplate
Dimensions (w/h/d)
Approx. 159 
× 217 ×
315 mm incl. projecting
parts and controls
Mass
Approx. 4.5 kg
Design and specifications are subject to change
without notice.
Other models:
530 - 1,710 kHz
(with the tuning interval
set at 10 kHz)
531 - 1,602 kHz
(with the tuning interval
set at 9 kHz)
Antenna
AM loop antenna, external
antenna terminal
Intermediate frequency
450 kHz
3
HCD-M70
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.
The following caution label is located inside the unit.
CAUTION
:
INVISIBLE    LASER    RADIATION    WHEN    OPEN    AND
INTERLOCKS   DEFEATED.    AVOID   EXPOSURE   TO   BEAM.
ADVARSEL :
USYNLIG   LASERSTRÅLING   VED   ÅBNING   NÅR 
SIKKERHEDSAFBRYDERE  ER  UDE  AF  FUNKTION.   UNDGÅ  UDSAETTELSE 
FOR  STRÅLING.
VORSICHT :
UNSICHTBARE  LASERSTRAHLUNG,  WENN 
ABDECKUNG  GEÖFFNET  UND  SICHEREITSVERRIEGELUNG 
ÜBERBRÜCKT.  NICHT  DEM  STRAHL  AUSSETZEN.
VARO!
:
AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALT-
TIINA  NÄKYMÄTTÖMÄLLE  LASERSÄTEILYLLE.  ÄLÄ  KATSO  SÄTEESEEN.
VARNING
:
OSYNLING LASERSTRÅLING NÄR DENNA  DEL ÄR ÖPPNAD
OCH SPÄRREN ÄR URKOPPLAD. BETRAKTA EJ STRÅLEN.
ADVERSEL :
USYNLIG  LASERSTRÅLING  NÅR  DEKSEL  ÅPNES  OG 
SIKKERHEDSLÅS BRYTES.  UNNGÅ EKSPONERING FOR STRÅLEN.
VIGYAZAT:
A  BURKOLAT  NYITÁSAKOR  LÁTHATATLAN  LÉZERSU-
GÁRVESZÉLY!   KERÜLJE  A  BESUGÁRZÁST! 
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.
TABLE  OF  CONTENTS
1.
SERVICING  NOTES
...............................................
4
2.
GENERAL
...................................................................
5
3.
DISASSEMBLY
3-1. Disassembly Flow ...........................................................
6
3-2. Panel (Side) (L), Panel (Side) (R) ..................................
7
3-3. Top Panel Section ............................................................
7
3-4. Mechanical Deck (Tape) .................................................
8
3-5. Front Panel Section .........................................................
8
3-6. Back Panel Assy ..............................................................
9
3-7. MAIN Board ...................................................................
9
3-8. CD Mechanism Deck (CDM55F-K6BD41A) ................ 10
3-9. Base Unit (BU-K6BD41A) ............................................. 11
3-10. Loading Board ................................................................. 11
3-11. Cam (CDM55) ................................................................ 12
4.
TEST  MODE
.............................................................. 13
5.
ELECTRICAL  ADJUSTMENTS
Deck Section ................................................................... 13
CD Section ...................................................................... 13
6.
DIAGRAMS
6-1. Block Diagram  – CD SERVO Section – ....................... 14
6-2. Block Diagram  – TUNER/TAPE DECK Section – ...... 15
6-3. Block Diagram  – MAIN Section – ................................ 16
6-4. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 17
6-5. Printed Wiring Board  – CD Board – ............................. 18
6-6. Schematic Diagram  – CD Board – ................................ 19
6-7. Printed Wiring Board  – TC Board – .............................. 20
6-8. Schematic Diagram  – TC Board – ................................. 21
6-9. Schematic Diagram  – MAIN Board (1/2) – .................. 22
6-10. Schematic Diagram  – MAIN (2/2)/JACK Boards – ...... 23
6-11. Printed Wiring Boards  – MAIN/JACK Boards – .......... 24
6-12. Printed Wiring Boards
– CONTROL/LOADING/VIDEO Boards – .................. 26
6-13. Schematic Diagram  – CONTROL/LOADING/
SWITCH (1/2)/VIDEO Boards – ................................... 27
6-14. Printed Wiring Board  – SWITCH Board – ................... 28
6-15. Schematic Diagram  – SWITCH Board (2/2) – ............. 29
6-16. Printed Wiring Board  – POWER Board – ..................... 30
6-17. Schematic Diagram  – POWER Board – ........................ 31
6-18. IC Pin Function Description ........................................... 34
7.
EXPLODED  VIEWS
7-1. Panel (Side) Section ........................................................ 36
7-2. Front Panel Section ......................................................... 37
7-3. Top Panel Section ............................................................ 38
7-4. Chassis Section-1 ............................................................ 39
7-5. Chassis Section-2 ............................................................ 40
7-6. CD Mechanism Deck (CDM55F-K6BD41A) ................ 41
7-7. Base Unit (BU-K6BD41A) ............................................. 42
8.
ELECTRICAL  PARTS  LIST
............................... 43
4
HCD-M70
SECTION  1
SERVICING  NOTES
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  HANDLING  THE  OPTICAL  PICK-UP
BLOCK  OR  BASE  UNIT
MODEL  IDENTIFICATION
– Rear Panel –
SERVICE POSITION
In checking the CD block, prepare jig (extension cable J-2501-
011-B: 1.25 mm Pitch, 19 cores, Length 300 mm).
Part No.
Model Name
Part No.
AEP and UK models
4-238-716-0
[]
US and Canadian models
4-238-888-0
[]
Singapore model
4-238-889-0
[]
Mexican model
4-239-812-0
[]
Australian model
4-240-890-0
[]
Korean model
4-240-891-0
[]
Thai model
4-240-892-0
[]
Connect jig (extension cable J-2501-011-B)
to the control board (CN805) and CD board (CN101). 
control board (CN805)
CD board (CN101) 
Any box to put.
In checking the tape deck section, prepare jig (extension cable J-
2501-167-A: 1.25 mm Pitch, 17 cores, Length 300 mm).
TC board (CN301)
main board (CN301)
Connect jig (extension cable J-2501-167-A)
to the main board (CN301) and TC board (CN301).
5
HCD-M70
5
GB
Remote Control
CD REPEAT qk (8)
CD 
N ws (8, 9)
DIR MODE ql (12–14)
DISPLAY 2 (11, 16)
DSG 1 (15)
ENTER qd (7, 10, 14, 15, 17)
FM MODE 9 (11)
FUNCTION qj (8–14, 18)
MEMORY qh (10)
SLEEP qf (16)
TAPE 
nN w; (12–14)
TIMER SELECT qs (15, 17)
TIMER SET qg (7, 14, 17)
TUNER/BAND wa (9–11)
TUNING MODE/PLAY MODE
q; (8–11, 14)
VOL +/– qa (17)
BUTTON DESCRIPTIONS
X 4 (8, 12, 14)
x 5 (8, 9, 12–14)
./> 6 (7–10, 14, 15, 17)
m/M 7 (8–12)
@/1 (power) 3 (7, 15, 17)
z REC 8 (13)
ALPHABETICAL ORDER
A – M
S – V
1
2
3
8
5
6
4
9
0
qa
qs
qd
qj
qk
qh
qg
qf
ql
w;
wa
ws
7
4
GB
How to use this page
Use this page to find the location of buttons and other
parts of the system that are mentioned in the text.
Illustration number
r
PLAY MODE qg (9, 13, 14)
R
R
Name of button/part
Reference page
List of Button Locations and Reference Pages
Main unit
ALPHABETICAL ORDER
A – F
CD disc tray 9 (8)
CD SYNCHRO qa (13, 14)
CD SYNCHRO indicator w; (14)
CD 
N 7 (8, 9)
CD 
X 7 (8)
DIRECTION q; (12–14)
Display window 2
DSG qk (15, 18)
FUNCTION ql (8–14, 18)
PHONES jack qf
PLAY MODE/TUNING MODE
qd (8–11, 14)
Remote sensor 4
REPEAT/FM MODE qs (8, 11)
TAPE 
nN qj (12–14)
TAPE 
X qj (12–14)
TUNER AM  qg (9–11)
TUNER FM  qg (9–11)
TUNING +/– 3 (9–11)
VOLUME  +/– 6 (17)
P – V
BUTTON DESCRIPTIONS
@/1 (power) 1 (7, 10, 15, 17)
m/M 3 (8, 12)
l/L 3 (8, 9, 14)
x 5 (8, 12, 13)
Z CD 8 (8)
z REC qh (13)
Z
x
nN
N
?/1
lm
ML
z
X
X
1
3
5
ql
6
7
4
8
9
2
0
qa
qs
qd
qf
qh
qg
qk
qj
w;
SECTION  2
GENERAL
This section is extracted from
instruction manual.
Setting the clock
1
Turn on the system.
2
Press TIMER SET on the remote.
3
Press 
.
/
>
 on the remote
repeatedly to set the hour.
4
Press ENTER on the remote.
The minute indication flashes.
5
Press 
.
/
>
 on the remote
repeatedly to set the minute.
6
Press ENTER on the remote.
The clock will begin operating.
To adjust the clock
1
Press TIMER SET on the remote.
2
Press 
. or > on the remote to select
“SET CLOCK”, then press ENTER on the
remote.
3
Do the same procedures as step 3 to 6
above.
HCD-M70
6
SET
3-2. PANEL (SIDE) (L),
PANEL (SIDE) (R)
(page 7)
3-3. TOP PANEL SECTION
(page 7)
3-4. MECHANICAL DECK (TAPE)
(page 8)
3-5. FRONT PANEL SECTION
(page 8)
3-6. BACK PANEL ASSY
(page 9)
3-7. MAIN BOARD
(page 9)
3-8. CD MECHANISM DECK
(CDM55F-K6BD41A)
(page 10)
3-9. BASE UNIT (BU-K6BD41A)
(page 11)
3-10. LOADING BOARD
(page 11)
3-11. CAM (CDM55)
(page 12)
• This set can be disassembled in the order shown below.
3-1.
DISASSEMBLY  FLOW
SECTION  3
DISASSEMBLY
HCD-M70
7
Note:
 Follow the disassembly procedure in the numerical order given.
3-2.
PANEL (SIDE) (L),  PANEL (SIDE) (R)
3-3.
TOP  PANEL  SECTION
1
four screws
(BTP3 
×
 10)
2
3
panel (side) (L)
1
screw
(BTP3 
×
 10)
4
screw
(BTP3 
×
 10)
4
four screws
(BTP3 
×
 10)
5
6
panel (side) (R)
3
wire (flat type) (17 core)
(CN301)
4
top panel section
1
screw
(BTP3 
×
 10)
2
HCD-M70
8
3-4.
MECHANICAL  DECK (TAPE)
3-5.
FRONT  PANEL  SECTION
3
shield case (TC)
5
connector
1
two screws
(BVTP3 
×
 8)
qs
MD bracket (R)
qa
two screws
(BVTT2.6 
×
 5)
6
screw
(BVTT2.6 
×
 5)
7
6
two screws
(BVTT2.6 
×
 5)
1
two screws
(BVTP3 
×
 8)
9
two screws
(BVTT2.6 
×
 5)
qd
mechanical deck
(tape)
2
0
MD bracket (L)
4
FFC cable 8P
8
TC board
1
FFC cable 20P (CN803)
2
connector
(CN304)
3
three screws
(BTP3 
×
 10)
4
front panel section
1
FFC cable 18P (CN802)
1
FFC cable 15P (CN801)
HCD-M70
9
3-6.
BACK  PANEL  ASSY
3-7.
MAIN  BOARD
1
connector
(CN809)
3
back panel assy
2
four screws
(BTP3 
×
 10)
2
two screws
(BTP3 
×
 10)
1
FFC cable 21P (CN806)
1
FFC cable 17P (CN804)
2
connector
(CN101)
4
main board
3
screw
(BTP3 
×
 12)
HCD-M70
10
3-8.
CD  MECHANISM  DECK (CDM55F-K6BD41A)
1
screw
(BVTP3 
×
 8)
3
Remove the CD mechanism deck
in the direction of the arrow.
2
two claws
0
CD mechanism deck
(CDM55F-K6BD41A)
8
two screws
(BTP3 
×
 8)
4
flexible flat cable (19 core)
(CN805)
6
four screws
(DIA. 2.6 
×
 8)
5
connector
(CN807)
7
control board
9
bracket (MPEG)

Download Sony HCD-M70 Service Manual (Repair Manual)

Here you can view online and download Sony HCD-M70 Service Manual in PDF. HCD-M70 service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony HCD-M70 Audio. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.