DOWNLOAD Sony CMT-NEZ50 / HCD-NEZ50 Service Manual ↓ Size: 3.79 MB | Pages: 49 in PDF or view online for FREE

Model
CMT-NEZ50 HCD-NEZ50
Pages
49
Size
3.79 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
cmt-nez50-hcd-nez50.pdf
Date

Sony CMT-NEZ50 / HCD-NEZ50 Service Manual ▷ View online

SERVICE MANUAL
COMPACT DISC DECK RECEIVER
HCD-NEZ50
Ver. 1.3  2007.04
SPECIFICATIONS
9-887-080-04
2007D05-1
© 2007.04
Sony Corporation
Personal Audio Division
Published by Sony Techno Create Corporation
AEP Model
UK Model
E Model
HCD-NEZ50 is the amplifier, CD player, tape deck
and tuner section in CMT-NEZ50.
Model Name Using Similar Mechanism
NEW
CD Section
Base Unit Name
BU-K8BD83S-WOD
Optical Pick-up block Name
KSM-213CDP
TAPE Section
Model Name Using Similar Mechanism
NEW
Tape Transport Mechanism Type
CMAL5Z235A
Amplifier section
European model:
DIN power output (rated): 18 + 18 W (6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference): 25 + 25 W (6 ohms at 1 kHz, 
10% THD)
Music power output (reference): 38 + 38 W
The following are measured at AC 220 V, 50/60 Hz (Argentina model), 
AC 120 V, 60 Hz (Mexican model), AC 120, 220 or 230 
 240 V, 50/60 Hz 
(other models)
DIN power output (rated): 14 + 14 W (6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference): 20 + 20 W (6 ohms at 1 kHz, 
10% THD)
Inputs
AUDIO IN: Sensitivity 250 mV, impedance 47 kilohms
Outputs
PHONES: Accepts headphones with an impedance of 8 ohms or more
SPEAKER: Accepts impedance of 6 to 16 ohms
CD player section
System: Compact disc and digital audio system
Laser Diode Properties
Emission Duration: Continuous
Laser Output*: Less than 44.6
µ
W
* This output is the value measurement at a distance of 200 mm from the 
objective lens surface on the Optical Pick-up Block with 7mm aperture.
Tape deck section
Recording system: 4-track 2-channel, stereo
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section:
Tuning range
87.5 
 108.0 MHz (50 kHz step)
Antenna: FM lead antenna
Antenna terminals: 75 ohms unbalanced
Intermediate frequency: 10.7 MHz
AM tuner section:
Tuning range
Pan-American model:  530 
 1,710 kHz (with 10 kHz tuning interval) 
 
531 
 1,710 kHz (with 9 kHz tuning interval)
European model: 531 
 1,602 kHz (with 9 kHz tuning interval)
Other models:  530 
 1,710 kHz (with 10 kHz tuning interval)
 
531 
 1,602 kHz (with 9 kHz tuning interval)
Antenna: AM loop antenna, external antenna terminal
Intermediate frequency: 450 kHz
General
Power requirements
Mexican model: AC 120 V, 60 Hz
European model: AC 230 V, 50/60 Hz
Korean model: AC 220 V, 60 Hz
Other models: AC 120, 220 or 230 
 240 V, 50/60 Hz
Argentina model: AC 220 V, 50/60 Hz
Adjustable with voltage selector
Power consumption:
European model:  60 watts
 
0.5 watts (in Power Saving Mode)
Other models: 50 watts
Dimensions (w/h/d) (excl. speakers):
Approx. 164 
×
 235 
×
 267 mm
Mass (excl. speakers): 
Approx. 3.7 kg
Design and specifications are subject to change without notice.
2
HCD-NEZ50
Notes on chip component replacement
Never reuse a disconnected chip component.
Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing
Keep the temperature of the soldering iron around 270 ˚C
during 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
...............................................
3
2.
GENERAL
...................................................................
5
3.
DISASSEMBLY
3-1.
Disassembly Flow ...........................................................
7
3-2.
Cabinet .............................................................................
7
3-3.
Cabinet (Top) Section ......................................................
8
3-4.
Base Unit (BU-K8BD83S-WOD) ...................................
8
3-5.
Front Panel Assy ..............................................................
9
3-6.
Mechanical Deck (CMAL5Z235A) ................................
9
3-7.
MAIN Board Block ......................................................... 10
3-8.
Tuner (FM/AM) ............................................................... 10
4.
TEST  MODE
.............................................................. 11
5.
MECHANICAL  ADJUSTMENTS
....................... 12
6.
ELECTRICAL  ADJUSTMENTS
......................... 13
7.
DIAGRAMS
7-1.
Block Diagram – CD SERVO Section – ......................... 15
7-2.
Block Diagram – MAIN Section – .................................. 16
7-3.
Printed Wiring Board – CD Board – ............................... 18
7-4.
Schematic Diagram – CD Board – .................................. 19
7-5.
Printed Wiring Boards – MAIN Section – ...................... 20
7-6.
Schematic Diagram – MAIN Section (1/2) – .................. 21
7-7.
Schematic Diagram – MAIN Section (2/2) – .................. 22
7-8.
Printed Wiring Board – PANEL Board – ........................ 24
7-9.
Schematic Diagram – PANEL Board – ........................... 25
7-10. Printed Wiring Boards – DC Section – ........................... 26
7-11. Printed Wiring Board – AC Board – ................................ 27
7-12. Schematic Diagram – POWER SUPPLY Section – ........ 28
8.
EXPLODED  VIEWS
8-1.
Cabinet Section ................................................................ 34
8-2.
Front Mechanical Deck Section ...................................... 35
8-3.
PANEL Board Section ..................................................... 36
8-4.
Cabinet (Top) Section ...................................................... 37
8-5.
MAIN Board Section ....................................................... 38
8-6.
AC Board, DC Board Section ......................................... 39
9.
ELECTRICAL  PARTS  LIST
................................ 40
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation
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  PUBLISHED  BY  SONY.
classified as a CLASS 
1 LASER product. This 
marking is located on the 
rear exterior.
This appliance is 
Ver. 1.3
Refer to SUPPLEMENT-1 for the HEAD PHONE board of printed
wiring board, schematic diagram and electrical parts list of
Argentina and Korean models.
When repairing the set of except Argentina and Korean models,
refer to either of original service manual/SUPPLEMENT-1
according to the set.
Refer to SUPPLEMENT-2 for the PANEL board of printed wiring
board, schematic diagram and electrical parts list of Argentina
and Korean models.
When repairing the set of except Argentina and Korean models,
refer to either of original service manual/SUPPLEMENT-2
according to the set.
3
HCD-NEZ50
The laser diode in the optical pick-up block may suffer electrostatic
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 emission,
observe from more than 30 cm away from the objective lens.
UNLEADED  SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size)
: LEAD  FREE  MARK
Unleaded solder has the following characteristics.
Unleaded solder melts at a temperature about 40 ˚C higher
than ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 ˚C.
Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful!
Strong viscosity
Unleaded solder is more viscou-s (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
SECTION  1
SERVICING  NOTES
NOTES  ON  HANDLING  THE  OPTICAL  PICK-UP
BLOCK  OR  BASE  UNIT
LASER  DIODE  AND  FOCUS  SEARCH  OPERATION
CHECK
During normal operation of the equipment, emission of the laser
diode is prohibited unless the upper lid is closed while turning ON
the S820. (push switch type)
The following checking method for the laser diode is operable.
Method
Emission of the laser diode is visually checked.
1. Open the upper lid.
2. Push the S820 as shown in Fig.1.
Note:
Do not push the detection lever strongly, or it may be bent or damaged.
3. Press the
u
button.
4. Check the object lens for confirming normal emission of the
laser diode. If not emitting, there is a trouble in the automatic
power control circuit or the optical pick-up.
In this operation, the object lens will move up and down 2
times along with inward motion for the focus search.
Fig.1 Method to push the S820
S820
MODEL  IDENTIFICATION
– Rear View –
Model Name
Part No.
AEP model
2-665-914-0[]
UK model
2-665-915-0[]
E model
2-665-916-0[]
Mexican model
2-665-917-0[]
Chilean and Peruvian models
2-665-918-0[]
Argentina model
2-665-919-0[]
Korean model
3-106-566-0[]
Part No.
Ver. 1.3
4
HCD-NEZ50
SERVICE  POSITION
– CD BOARD –
– TAPE MECHANICAL DECK –
CD board
cabinet (top) section
tape mechanical deck
Page of 49
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Sony CMT-NEZ50 / HCD-NEZ50 Service Manual ▷ Download

  • DOWNLOAD Sony CMT-NEZ50 / HCD-NEZ50 Service Manual ↓ Size: 3.79 MB | Pages: 49 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sony CMT-NEZ50 / HCD-NEZ50 in PDF for free, which will help you to disassemble, recover, fix and repair Sony CMT-NEZ50 / HCD-NEZ50 Audio. Information contained in Sony CMT-NEZ50 / HCD-NEZ50 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.