Sony HCD-M70 Service Manual ▷ View online
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.
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
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.
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)
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
Ω
0.15
µ
F
AC
voltmeter
(0.75 V)
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
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.
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.
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:
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
240 V AC, 50/60 Hz
Adjustable with voltage
selector
Power consumption
European model:
European model:
See the nameplate
0.5 W (in the standby
mode)
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
parts and controls
Mass
Approx. 4.5 kg
Design and specifications are subject to change
without notice.
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)
(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
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.
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.
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.
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.
FOR STRÅLING.
VORSICHT :
UNSICHTBARE LASERSTRAHLUNG, WENN
ABDECKUNG GEÖFFNET UND SICHEREITSVERRIEGELUNG
ÜBERBRÜCKT. NICHT DEM STRAHL AUSSETZEN.
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-
• 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
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
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
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
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
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
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.
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.
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
BLOCK OR BASE UNIT
MODEL IDENTIFICATION
– Rear Panel –
– 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).
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).
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).
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).
to the main board (CN301) and TC board (CN301).
5
HCD-M70
5
GB
Remote Control
CD REPEAT qk (8)
CD
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)
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
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
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.
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
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)
Display window 2
DSG qk (15, 18)
FUNCTION ql (8–14, 18)
PHONES jack qf
PLAY MODE/TUNING MODE
PLAY MODE/TUNING MODE
qd (8–11, 14)
Remote sensor 4
REPEAT/FM MODE qs (8, 11)
TAPE
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)
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.
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.
remote.
3
Do the same procedures as step 3 to 6
above.
above.
