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harman/kardon

Model CDR30

Dual Tray CD/CD-R/CD-RW Recorder/Player

PRELIMINARY

SERVICE MANUAL

harman/kardon, Inc.

250 Crossways Park Dr.

Woodbury, New York   11797

SPECIFICATIONS . . . . . . . . . . ………………………………………... . . . . . . . . . . . . . 2
SERVICING PRECAUTIONS . ……………………………………….. . . . . . . . . . . . . . . 3
ESD PRECAUTIONS . . . . . . …………………………………………. . . . . . . . . . . . . . . 5
TROUBLESHOOTING GUIDE …………………….. . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
WIRING DIAGRAMS . . …………………………………………... . . . . . . .. . . . . . . . . . . 23
BLOCK DIAGRAMS . . . . . . . ………………………………………… . . . .. . . . . . . . . . . 25
SCHEMATIC DIAGRAMS . . . . . . . ………………………………………… . . . . . . . . . . 28
PCB BOARD . . . . . . . . . . . . . . …………………………………………… .  . . . . . . . . . . 45
EXPLODED VIEW . . . . . . . . …………………………………………… . . . . . . . . . . . . . 54
MECHANICAL PARTS LIST . …………………………………………… . . .. . . . . . . . . . 57
ELECTRICAL PARTS LIST . …………………………………………… . . . . … . . . . . . . 59

Playback Sampling Frequency 

44.1 kHz

D/A Conversion 

96kHz, Multi-Bit Delta-Sigma Conversion

Oversampling 

128 Times

Frequency Response 

2Hz – 20,050Hz

Playback S/N 

100dB

Playback Dynamic Range 

95dB

Playback THD 

0.005% / –88dB

Analog Audio Output 

1V RMS, ± 2dB (1KHz 0dB)

Digital-Coaxial Output 

0.5 Vpp/75

Ω

Headphone Output 

0.5V RMS/32

Ω

 Load (1KHz 0dB)

Digital Dubbing Mode(X1/X2/X4) 

Equal to source

Digital Input Sample Rate 

32kHz ~ 96kHz

Signal/Noise Ratio - Analog 

84dB

Signal/Noise Ratio - External(Sourse) 

source-10dB

Dynamic Range 

87dB

THD 

0.005%/-85dB

Analog Input Sensitivity 

300 mV RMS 47k

Ω

 = 0dB

Digital Inputs (Direct Recording) 

44.1kHz, ± 100 ppm/min.

Power Requirement 

100~240V AC, 50/60Hz

Power Consumption 

28 Watts

Dimensions

Width 

17.3" (440mm)

Height 

4.4" (112mm)

Depth 

13.9" (354mm)

Weight 

14.3 lbs (6.5 kg)

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.

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

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.

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

Ω

)

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