DOWNLOAD Sony CMT-EP707 / HCD-EP707 Service Manual ↓ Size: 3.52 MB | Pages: 54 in PDF or view online for FREE

Model
CMT-EP707 HCD-EP707
Pages
54
Size
3.52 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
cmt-ep707-hcd-ep707.pdf
Date

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-
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.
CAUTION
Use of controls or adjustments or performance of procedures
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.
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  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 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
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
– 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
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
7.
ELECTRICAL  PARTS  LIST
............................... 38
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.
• MODEL  IDENTIFICATION
– 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
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.
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.
3
Reinsert the tagged pin (see Fig. B).
A
B
EP707 (SAFETY) (STRIP)
(Part No. 4-244-664-01)
EP707 (STUD)
(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)
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))
– Bottom View –
5
HCD-EP707
SECTION  2
GENERAL
This section is extracted from
instruction manual.
LOCATION OF CONTROLS
– 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
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 
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 
TAPE
M > (fast forward)  qs 
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
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 
P – Z
PGM CLEAR  qs 
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
Remote control
@/1 (power)  4 
m (rewind) M (fast forward)
ws
. (go back) > (go forward)
wd
 
X (pause) wf 
nN (play)  wg 
x (stop)  5 
ALPHABETICAL ORDER
BUTTON DESCRIPTIONS
Page of 54
Display

Sony CMT-EP707 / HCD-EP707 Service Manual ▷ Download

  • DOWNLOAD Sony CMT-EP707 / HCD-EP707 Service Manual ↓ Size: 3.52 MB | Pages: 54 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sony CMT-EP707 / HCD-EP707 in PDF for free, which will help you to disassemble, recover, fix and repair Sony CMT-EP707 / HCD-EP707 Audio. Information contained in Sony CMT-EP707 / HCD-EP707 Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.