DOWNLOAD Harman Kardon CDR 20 (serv.man13) Service Manual ↓ Size: 9 MB | Pages: 74 in PDF or view online for FREE

Model
CDR 20 (serv.man13)
Pages
74
Size
9 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
cdr-20-sm13.pdf
Date

Harman Kardon CDR 20 (serv.man13) Service Manual ▷ View online

The Harman Kardon
Model CDR 20
Dual-Tray CD-R/CD-RW Recorder/Player
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harman/kardon
250 Crossways Park Drive, Woodbury, New York 11797
www.harmankardon.com
© 2000 Harman Kardon, Incorporated
Part #3828R-D004M
-2-
CONTENTS
SPECIFICATIONS  . . . . . . . . . . . . . . . . . . . . . . . . 2
SERVICING PRECAUTIONS   . . . . . . . . . . . . . . . . 3
ESD PRECAUTIONS   . . . . . . . . . . . . . . . . . . . . . . 5
TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . 6
WIRING DIAGRAM   . . . . . . . . . . . . . . . . . . . . . . 32
BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . 33
SCHEMATIC DIAGRAMS   . . . . . . . . . . . . . . . . . . 36
PCB BOARD   . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
EXPLODED VIEW   . . . . . . . . . . . . . . . . . . . . . . . 48
REPLACEMENT PARTS LIST  . . . . . . . . . . . . . . 51
SPECIFICATIONS
Signal Format
Playback Sampling Frequency 
44.1 kHz
D/A Conversion 
96kHz, Multi-Bit Delta-Sigma Conversion
Oversampling 128 
Times
Playback Specifications
Frequency Response 
2Hz – 20,050Hz
Playback S/N 
105dB
Playback Dynamic Range 
105dB
Playback THD 
0.005% / –88dB
Analog Audio Output 
2V RMS, ± 2dB
Digital-Coaxial Output 
0.5 Vpp/75
Headphone Output 
1V RMS/32
Load
Record Specifications
Digital Dubbing Mode(X1/X2/X4)
Equal to source
Digital Input Sample Rate
32kHz ~ 96kHz
Signal/Noise Ratio - Analog
91dB
Signal/Noise Ratio - External(Sourse)
source-10dB
Dynamic Range
91dB
THD
0.005%/-85dB
Analog Input Sensitivity 
330 mV RMS 47k
= 0dB
Digital Inputs (Direct Recording) 
44.1kHz, ± 100 ppm/min.
General
Power Requirement 
100~240V AC, 50/60Hz
Power Consumption 
28 Watts
Dimensions
Width 17.3"/440mm
Height 4.4"/112mm
Depth 14.2"/363mm
Weight 
10.5 lb/4.7 kg
-3-
SERVICING PRECAUTIONS
NOTES REGARDING HANDLING OF THE PICK-UP
1. Notes for transport and storage
1) The pick-up should always be left in its conductive bag until immediately prior to use.
2) The pick-up should never be subjected to external pressure or impact.
2. Repair notes
1) The pick-up incorporates a strong magnet, and so should never be brought close to magnetic materials.
2) The pick-up should always be handled correctly and carefully, taking care to avoid external pressure and
impact. If it is subjected to strong pressure or impact, the result may be an operational malfunction
and/or damage to the printed-circuit board.
3) Each and every pick-up is already individually adjusted to a high degree of precision, and for that reason
the adjustment point and installation 
screws should absolutely never be touched.
4) Laser beams may damage the eyes!
Absolutely never permit laser beams to enter the eyes!
Also NEVER switch ON the power to the laser output part (lens, etc.) of the pick-up if it is damaged.
5) Cleaning the lens surface
If there is dust on the lens surface, the dust should be cleaned away by using an air bush (such as used
for camera lens). The lens is held by a delicate spring. When cleaning the lens surface, therefore, a cot-
ton swab should be used, taking care not to distort this.
6) Never attempt to disassemble the pick-up.
Spring by excess pressure. If the lens is extremely dirty, apply isopropyl alcohol to the cotton swab. (Do
not use any other liquid cleaners, because they will damage the lens.) Take care not to use too much of
this alcohol on the swab, and do not allow the alcohol to get inside the pick-up.
Storage in conductive bag
NEVER look directly at the laser beam, and don’t let contact
fingers or other exposed skin.
Magnet
How to hold the pick-up
Conductive Sheet
Cotton swab
Pressure
Pressure
Drop impact
-4-
NOTES REGARDING COMPACT DISC PLAYER REPAIRS
1. Preparations
1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). These compo-
nents are sensitive to, and easily affected by, static electricity. If such static electricity is high voltage,
components can be damaged, and for that reason components should be handled with care.
2) The pick-up is composed of many optical components and other high-precision components. Care must
be taken, therefore, to avoid repair or storage where the temperature of humidity is high, where strong
magnetism is present, or where there is excessive dust.
2. Notes for repair
1) Before replacing a component part, first disconnect the power supply lead wire from the unit
2) All equipment, measuring instruments and tools must be grounded.
3) The workbench should be covered with a conductive sheet and grounded.
When removing the laser pick-up from its conductive bag, do not place the pick-up on the bag. (This is
because there is the possibility of damage by static electricity.)
4) To prevent AC leakage, the metal part of the soldering iron should be grounded.
5) Workers should be grounded by an armband (1M
)
6) Care should be taken not to permit the laser pick-up to come in contact with clothing, in order to prevent
static electricity changes in the clothing to escape from the armband.
7) The laser beam from the pick-up should NEVER be directly facing the eyes or bare skin.
Resistor
(1 Mohm)
Conductive
Sheet
Resistor
(1 Mohm)
Armband
Page of 74
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Harman Kardon CDR 20 (serv.man13) Service Manual ▷ Download

  • DOWNLOAD Harman Kardon CDR 20 (serv.man13) Service Manual ↓ Size: 9 MB | Pages: 74 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Harman Kardon CDR 20 (serv.man13) in PDF for free, which will help you to disassemble, recover, fix and repair Harman Kardon CDR 20 (serv.man13) Audio. Information contained in Harman Kardon CDR 20 (serv.man13) 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.