Sony CMT-EP707 / HCD-EP707 Service Manual ▷ View online
2
HCD-EP707
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.
This appliance is classified as a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT MARKING is located on
the bottom.
The CLASS 1 LASER PRODUCT MARKING is located on
the bottom.
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.
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.
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 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” 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 suit-
able. (See Fig. A)
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 suit-
able. (See Fig. A)
3
HCD-EP707
TABLE OF CONTENTS
1.
SERVICING NOTES
................................................
3
2.
GENERAL
...................................................................
5
3.
DISASSEMBLY
3-1. Disassembly Flow ...........................................................
6
3-2. Side (Panel) .....................................................................
7
3-3. Top Cabinet Section ........................................................
7
3-4. Tape Mechanism Deck (CRL4349) ................................
8
3-5. Front Panel Section .........................................................
8
3-6. MAIN Board ...................................................................
9
3-7. CD Mechanism Deck (CMCJ-0132) ..............................
9
3-8. REGULATOR Board ...................................................... 10
3-9. POWER AMP Board ....................................................... 10
3-10. Cover ............................................................................... 11
3-11. Drawer ............................................................................. 12
3-12. Belt (Gray/Black) ............................................................ 13
3-13. Optical Block .................................................................. 13
3-9. POWER AMP Board ....................................................... 10
3-10. Cover ............................................................................... 11
3-11. Drawer ............................................................................. 12
3-12. Belt (Gray/Black) ............................................................ 13
3-13. Optical Block .................................................................. 13
4.
ELECTRICAL ADJUSTMENTS
......................... 14
5.
DIAGRAMS
5-1. Block Diagram – TUNER Section – ............................. 16
5-2. Block Diagram – TAPE DECK Section – ..................... 17
5-3. Block Diagram – MAIN Section – ................................ 18
5-4. Block Diagram
5-2. Block Diagram – TAPE DECK Section – ..................... 17
5-3. Block Diagram – MAIN Section – ................................ 18
5-4. Block Diagram
– DISPLAY/POWER SUPPLY Section – ...................... 19
5-5. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 20
5-6. Printed Wiring Boards – MAIN Section – .................... 21
5-7. Schematic Diagram – MAIN Section (1/2) – ................ 22
5-8. Schematic Diagram – MAIN Section (2/2) – ................ 23
5-9. Printed Wiring Boards – POWER AMP Section – ...... 24
5-10. Schematic Diagram – POWER AMP Section – ............ 25
5-11. Printed Wiring Boards – DISPLAY Section – .............. 26
5-12. Schematic Diagram – DISPLAY Section – ................... 27
5-13. Printed Wiring Boards – REGULATOR Section – ....... 28
5-14. Schematic Diagram – REGULATOR Section – ........... 29
5-15. IC Pin Function Description ........................................... 31
5-7. Schematic Diagram – MAIN Section (1/2) – ................ 22
5-8. Schematic Diagram – MAIN Section (2/2) – ................ 23
5-9. Printed Wiring Boards – POWER AMP Section – ...... 24
5-10. Schematic Diagram – POWER AMP Section – ............ 25
5-11. Printed Wiring Boards – DISPLAY Section – .............. 26
5-12. Schematic Diagram – DISPLAY Section – ................... 27
5-13. Printed Wiring Boards – REGULATOR Section – ....... 28
5-14. Schematic Diagram – REGULATOR Section – ........... 29
5-15. IC Pin Function Description ........................................... 31
6.
EXPLODED VIEWS
6-1. Panel Section ................................................................... 33
6-2. Front Panel Section ......................................................... 34
6-3. Top Cabinet Section ........................................................ 35
6-4. Chassis Section ............................................................... 36
6-5. CD Section ...................................................................... 37
6-2. Front Panel Section ......................................................... 34
6-3. Top Cabinet Section ........................................................ 35
6-4. Chassis Section ............................................................... 36
6-5. CD Section ...................................................................... 37
7.
ELECTRICAL PARTS LIST
............................... 38
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
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.
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.
• MODEL IDENTIFICATION
– Rear View –
– Rear View –
Power Voltage
Indication
AC: 120 V 60 Hz 38 W
AC: 230 V - 50/60 Hz 38 W
Model
US and Canadian
models
models
Other models
Power Voltage Indication
SECTION 1
SERVICING NOTES
Ver 1.7
4
HCD-EP707
NOTE FOR TRANSPORTING A SET
After repair is completed, be sure to attach EP707 (SAFETY)
(STRIP) (Part No. 4-244-664-01) and EP707 (STUD) (Part No. 4-
244-665-01) on the set with following procedure before you trans-
port a set.
(STRIP) (Part No. 4-244-664-01) and EP707 (STUD) (Part No. 4-
244-665-01) on the set with following procedure before you trans-
port a set.
1
Re-tie the strip on the disc tray as shown (see Fig. A).
2
Press ?/1 to close the disc tray.
The system turns off. Do not press DISC 1 - 3 or Z to close the disc
tray.
The system turns off. Do not press DISC 1 - 3 or Z to close the disc
tray.
3
Reinsert the tagged pin (see Fig. B).
A
B
EP707 (SAFETY) (STRIP)
(Part No. 4-244-664-01)
(Part No. 4-244-664-01)
EP707 (STUD)
(Part No. 4-244-665-01)
(Part No. 4-244-665-01)
Ver 1.7
static protection land of laser diode
CD mechanical (CMCJ-0132)
NOTE FOR EXCHANGING A CD MECHANICAL
(CMCJ-0132)
(CMCJ-0132)
Set the static protection land of laser diode of the new CD me-
chanical (CMCJ-0132) to open before attaching in a set, when
carrying out repair exchange of the CD mechanical (CMCJ-0132).
(Part No. 1-796-542-11 MECHANICAL, CD (CMCJ-0132))
chanical (CMCJ-0132) to open before attaching in a set, when
carrying out repair exchange of the CD mechanical (CMCJ-0132).
(Part No. 1-796-542-11 MECHANICAL, CD (CMCJ-0132))
– Bottom View –
5
HCD-EP707
SECTION 2
GENERAL
This section is extracted from
instruction manual.
instruction manual.
LOCATION OF CONTROLS
– Front Panel –
– Front Panel –
Main unit
P – Z
PGM CLEAR 8
PHONES jack ql
PLAY MODE wa
PRESET +/– qd
Remote sensor wd
TAPE 2
TUNER 6
TUNER MEM q;
TUNING +/– qs
VOLUME control qh
PHONES jack ql
PLAY MODE wa
PRESET +/– qd
Remote sensor wd
TAPE 2
TUNER 6
TUNER MEM q;
TUNING +/– qs
VOLUME control qh
ALPHABETICAL ORDER
A – M
Cassette compartment 5
CD 3
DISC 1/DISC 2/DISC 3 qf
Disc tray qg
DISC SKIP 3
DISPLAY ws
Display Window 4
ENTER 1
FM MODE/DIR wa
MD 7
MEGA BASS qk
MUSIC MENU qj
CD 3
DISC 1/DISC 2/DISC 3 qf
Disc tray qg
DISC SKIP 3
DISPLAY ws
Display Window 4
ENTER 1
FM MODE/DIR wa
MD 7
MEGA BASS qk
MUSIC MENU qj
BUTTON DESCRIPTIONS
@/1 (power) w;
CD
. m (go back) qs
M > (go forward) qs
nN (play) 1
X (pause) q;
Z (eject) qf
x (stop) 8
M > (go forward) qs
nN (play) 1
X (pause) q;
Z (eject) qf
x (stop) 8
TAPE
M > (fast forward) qs
X (pause) 0
nN (play) 1
z REC PAUSE/START qa
. m (rewind) qs
Z
X (pause) 0
nN (play) 1
z REC PAUSE/START qa
. m (rewind) qs
Z
PUSH OPEN/CLOSE 9
x (stop) 8
AM loop
antenna
antenna
Left speaker
Right speaker
* Except for European model
FM antenna*
– Back Panel –
A – M
CD qa
CLOCK/TIMER ON/OFF 2
CLOCK/TIMER SET 3
DISC SKIP 7
DISPLAY 6
ENTER qg
FM MODE 8
MD 9
MEGA BASS qf
MUSIC MENU +/– qj
MUTING qh
CLOCK/TIMER ON/OFF 2
CLOCK/TIMER SET 3
DISC SKIP 7
DISPLAY 6
ENTER qg
FM MODE 8
MD 9
MEGA BASS qf
MUSIC MENU +/– qj
MUTING qh
P – Z
PGM CLEAR qs
PLAY MODE w;
PRESET/CLOCK/TIMER +/–
PLAY MODE w;
PRESET/CLOCK/TIMER +/–
wd
REPEAT/DIR wa
SLEEP 1
TAPE ql
TUNER/BAND q;
TUNER MEMORY qk
TUNING +/– ws
VOL (volume) +/– qd
SLEEP 1
TAPE ql
TUNER/BAND q;
TUNER MEMORY qk
TUNING +/– ws
VOL (volume) +/– qd
Remote control
@/1 (power) 4
m (rewind) M (fast forward)
m (rewind) M (fast forward)
ws
. (go back) > (go forward)
wd
X (pause) wf
nN (play) wg
x (stop) 5
nN (play) wg
x (stop) 5
ALPHABETICAL ORDER
BUTTON DESCRIPTIONS