CDP-EX77, CDP-EX770, DHC-EX77MD, DHC-MD77, MHC-EX66 - Sony Audio Service Manual (repair manual)

cdp-ex77, cdp-ex770, dhc-ex77md, dhc-md77, mhc-ex66 service manual
Model
CDP-EX77 CDP-EX770 DHC-EX77MD DHC-MD77 MHC-EX66
Pages
33
Size
979.21 KB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
cdp-ex77-cdp-ex770-dhc-ex77md-dhc-md77-mhc-ex66.pdf
Date

Read Sony CDP-EX77 / CDP-EX770 / DHC-EX77MD / DHC-MD77 / MHC-EX66 Service Manual online

MICROFILM
CDP-EX77
COMPACT DISC PLAYER
SERVICE MANUAL
AEP Model
UK Model
E Model
CDP-EX77 is the CD player section
in MHC-EX66, DHC-EX77MD/MD77
Model Name Using Similar Mechanism
HCD-MD5
CD Mechanism Type
CDM38A-5BD19
Base Unit Name
BU-5BD19
Optical Pick-up Name
KSS-213B/K-N
SPECIFICATIONS
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 Op-
tical Pick-up Block with 7 mm aperture.
Frequency response
2 Hz to 20 kHz (± 0.5 dB)
CD OPTICAL DIGITAL OUT
(Square optical connector jack, rear panel)
Dimensions (w/h/d) incl. projecting parts and
controls:
Approx. 280 
×
 122.5 
×
 347 mm
Mass
Approx. 3.7 kg
Design and specifications are subject to change without notice.
– 2 –
TABLE  OF  CONTENTS
1.
SERVICING  NOTES
1-1.
Power Supply During Servicing ...................................... 3
1-2.
Fluorescent Indicator Tube/Key Check Mode ................. 3
2.
GENERAL
................................................................... 4
3.
DISASSEMBLY
.......................................................... 9
4.
ELECTRICAL  ADJUSTMENTS
......................... 14
5.
DIAGRAMS
................................................................ 16
5-1.
Printed Wiring Board – BD Section – ............................. 17
5-2.
Schematic Diagram – BD Section – ................................ 19
5-3.
Schematic Diagram
– MAIN/PANEL/MOTOR Section – .............................. 23
5-4.
Printed Wiring Boards
– MAIN/PANEL/MOTOR Section – .............................. 27
5-5.
IC Pin Function Description ............................................ 34
6.
EXPLODED  VIEWS
................................................ 36
7.
ELECTRICAL  PARTS  LIST
................................ 41
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.
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.
LASER  DIODE  AND  FOCUS  SEARCH  OPERATION
CHECK
Carry out the “S curve check” in “CD section adjustment” and
check that the S curve waveforms is output three times.
CAUTION
Use of controls or adjustments or performance of
procedures other than those specified herein may
result in hazardous radiation exposure.
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.
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  PUBLISHED  BY  SONY.
– 3 –
SECTION  1
SERVICING  NOTES
1-1.
Power Supply During Servicing
This unit is not able to operate on its own because it does not have its own power supply. During servicing, connect to other units.
Power is supplied when the SYSTEM POWER button of the amplifier (TA-EX66/EX77) is turned ON.
If the other units are not available, use a service box (PFJ-1) and jig (J-2501-078-A).
In this case, press the STOP button and  TIME button simultaneously to turn on the power.
[Connection Diagram]
FH-E939, 838, 937
CDP/TC
POWER SW
SERVICE BOX (PFJ-1)
JIG
(J-2501-078-A)
CN904
17P
CN902
7P
CORD WITH CONNECTOR 17 P
(Provided with PFJ-1)
CORD WITH CONNECTOR 7 P
(Provided with unit)
CN101 7P
SYSTEM CONTROL
UNIT (CDP-EX77)
1-2.
Fluorescent Indicator Tube/Key Check Mode
After turning on the power, press the STOP button, TIME button, and DISC 1 button simultaneously to perform the Fluorescent indi-
cator tube check.
The steps of the Fluorescent Indicator Tube check mode will proceed onto the next one by the above multiple pressing.
During the Fluorescent Indicator Tube check mode, press any button or rotate the selector knob to set the key check mode.
To end the mode, press the above three buttons simultaneously.
Note 1) When the three buttons pressed to enter the Fluorescent Indicator Tube all lit mode are released together, the Fluorescent Indica-
tor Tube all lit mode will remain on. When released separately, the key check mode will be set soon after the Fluorescent
Indicator Tube all lit mode.
In “multiple pressing”, if the three buttons are pressed and released together, the next mode will be set. If not, the key check
mode will be set.
Note 2) In the key check mode, each time the button is pressed, the “KEY=” number on the Fluorescent indicator tube increases. When
the SELECTOR knob is rotated, the “KEY=” number on the Fluorescent indicator tube increases in the + direction and de-
creases in the – direction.
Fluorescent Indicator Tube all lit mode     
Multiple pressing
Segment pattern 1 mode     
Multiple pressing
Segment pattern 2 mode     
Multiple pressing
End of test mode
Key check mode
Press any key or roted the  SELECTOR  knob
Multiple pressing
– 4 –
SECTION  2
GENERAL
This section is extracted
from instruction manual.
Page of 33
Display

Download Sony CDP-EX77 / CDP-EX770 / DHC-EX77MD / DHC-MD77 / MHC-EX66 Service Manual (Repair Manual)

Here you can read online and download Sony CDP-EX77 / CDP-EX770 / DHC-EX77MD / DHC-MD77 / MHC-EX66 Service Manual in PDF. CDP-EX77 / CDP-EX770 / DHC-EX77MD / DHC-MD77 / MHC-EX66 service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony CDP-EX77 / CDP-EX770 / DHC-EX77MD / DHC-MD77 / MHC-EX66 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.