This is the 40 pages manual for Akai CD 73 Service Manual.
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COMPACT DISC PLAYER
Pick-up sys em
Digital ﬁlter .....
Error correction system.
Number of channels ..
Wow & Flutter
Analogue output level
Digital output level/
. Compact disc player
3 beam Laser pick up
18 hit, 4 times over sampling
16 bit linear
Cross Interleave Reed
. 2 channels (Stereo)
5 Hz to 20 kHz i 0.3 dB
97 dB or more
. 106 dB or more
. 0.0025% or less
Less than measurable limits
. 0.5 Vp-p/75 ohms
. Min.20 dBm. MaxilS dBm,
wave length 660 nm
Headphone output level/
Impedance... . 28 mW/ 32 ohms
Spindle motor Brush-less D.D. motor
Power requirements . 120 V, 60 Hz for USA &
220 V, 50 Hz for Europe ex-
240 V, 50 Hz for UK &
50 112/60 Hz convertible for
. 425 (W)><112 (H)><330 (1)) mm
(16.7 X 4.4 X 13.0 inchs)
Weight ............................. 7.5 kg (166 lbs)
For improvement purposes, speciﬁcations and design are subject to change without notice.
* SAFETY INSTRUCTIONS
PRECAUTIONS DURING SERVIDING
1. Parts identiﬁed by the [5 symbols are critical for safety.
Replace only with pans number speciﬁed.
2, In addition to safety, other parts and assemblies are
speciﬁed for conformance with such regulations as those
applying to spurious radiation.
These must also be replaced only with speciﬁed
Examples: RF converters, tuner units, antenna selector
switches, RF cables, noise blocking capacitors, noise
blocking ﬁlters, etc.
3. Use speciﬁed internal wiring. Note especially:
1) Wires covered with PVC tubing
2) Double insulated wires
3) High voltage leads
4. Use speciﬁed insulating materials for hazardous live parts.
1) Insulation Tape
2) PVC tubing
3) Spacers (Insulating Barriers)
4) Insulation sheets for transistors
5) Plastic screws for ﬁxing microswitch (especially in
5. When replacing AC primary side components (transform-
ers, power cords, noise blocking capacitors, etc.), wrap
ends of wires securely about the terminals before soldering.
6. Observe that wires do not contact heat producing parts
(heatsinks, oxide metal ﬁlm resistors, fusible resistors,
7. Check that replaced wires do not contact sharp edged or
8. Also check areas surrounding repaired locations.
9. Use care that foreign objects (screws, solder droplets, etc.)
do not remain inside the set.
SAFETY CHECK AFTER SERVICING
Conﬁrm the speciﬁed insulation resistance between power
cord plug prongs and externally exposed parts of the set is
greater than 10 M ohms, but for equipment with external
antenna terminals (tuner, receiver, etc.) and is intended for
or , speciﬁed insulation resistance should be head-
phone jacks, line-in-out jacks, etc, more than 2.2 M ohms
(ground terminals, microphone jacks).
BEFORE USING THE CD PLAYER
On the Transport Locking Lever
This CD player has a Transport Locking Lever located on
the bottom panel. This lever locks the laser pick up
mechanism to prevent vibration during transportation. Make
sure to set this lever to the UNLOCK position before
Raise the CD player as shown in the illustration (Front panel
facing up), and then turn the Transport Locking Lever to the
When transporting the CD player
Make sure to remove the compact disc from the CD player,
and reset the Transport Locking Lever to the LOCK position.
SYMBOLS FOR PRIMARY DESTINATION
Alphabet indicates the destination of the units as listed below.
Symbols Principal Destinations
Europe (except UK)
W. Germany only
VOLTAGE CONVERSION Model only)
Before connecting the power cord, SET the VOLTAGE
SELECTOR located on the rear panel with a screwdriver so
that the correct voltage is indicated.