Sony cdp c 312m

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CDP-C3IZM

SERVICE MANUAL

US Model
AEP Model
Australian Model

Model Name Using Similar Mechanism CDP-CBIlM/C313M/C315M
CD Mechanism Type CDM16H2.5803
Optical Pick-Up Block Type BU-SBD3

on the Optical Pick-up Blockv

Frequency
response

2 Hz -- 20 kHz ($0.5 dB)

Signal to noise
ratio

More than 100 dB

Dynamic range

More than 98 dB

(phono jacks)

Harmonic Less than (10059. (1 kHz)

distortion

Channel More than 100 dB (1 kHz)

separation

Wow and flutter Below measurable limit

Outputs Output level 2 V (at 50 kilohms)
LINE OUT Load impedance over 10 kilohms

I...
MICROFILM

US model: 120V AC, 60 Hz
Australian model: 240 V AC, 50/60 Hz
AEP model: 220-230 V AC, 50/60 Hz

12W

SPECIFICATIONS
System Compact disc digital audio system General
Laser Semiconductor laser P
(x = 780 nm) 0W?" l
Emission duration: continuous requiremen 5
Laser ontput Max, 446 pW' power
This output is the value measured at a distance consumption
at about 200 mm lrom the objective lens surlace .
DimenSIons

(not including
projecting parts
and controls)

Approx. 355 x 120 x 385 mm (wlh/d)
(14 X 4% x 151/- inches)

Weight

Approx. 43 kg (10 lbs 13 oz)

Supplied accessories

Audio signal
connecting cord

1
(phone plug X 2 w phono plug x 2)

Design and specifications subject to change without

notice.

COMPACT msc PLAYER
S ON Y®

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CDP-C312M

For the European countries

CLASS 1 LASER PRODUCT
LUOKAN I LASERLAITE

KLASS I LASERAPPARAT

This Compact Disc player is
classified as a CLASS 1
LASER product.

The CLASS 1 LASER
PRODUCT label is located
on the rear exterior.

NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer
electrostatic breakdown because of the potential di-
ference 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 objec-
tive lens in the optical pick-up block. Therefore, when
checking the laser diode emission, observe from more
than 30cm away from the objective lens.

SA FETY-RELATED COMPONENT WARNINGI!

COMPONENTS IDENTIFIED BV MARK A OR DOTTED
LINE WITH MARK A ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL T0 SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED 8V SONY.

MODEL IDENTIFICATION
-Model Number Label-

SONYo MODEL No. CDP~0312M
.-

COMPACT DISC PLAYER

V//////////////////////////

us model: AC: 120v 60H: 12w
AEP model: ac: 220-230V~50/60Hz
AUS model: Ac: 240V~50/60Hz

CAUS: Australian model

SAFETY CH EC K-OUT

After correcting the original service problem,
perform the following safety check before releasing
the set to the customer:

Check the antenna terminals, metal trim, metallized
knobs, screws, and all other exposed metal parts for
AC leakage. Check leakage as described below.

LEAKAGE TEST

The AC leakage from any exposed metal part to
earth ground and from all exposed metal parts to any
exposed metal part having a return to chassis, must
not exceed 05 mA (500 microampers). Leakage
current can be measured by any one of three
methods.

I. A commercial leakage tester, such as the
Simpson 229 or RCA WT~540A. Follow the
manufacturers instructions to use these instm-
ments.

2. A battery»operated AC milliammeter. The Data
Precision 245 digital multimeter is suitable for
this job.

3. Measuring the voltage drop across a resistor by
means of a VOM or battery-operated AC volt-
meter. The limit" indication is 0.75 V, so
analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa
SH-63Trd are examples of a passive VOM that
is suitable. Nearly all battery operated digital
multimeters that have a 2V AC range are
suitable. (See Fig. A)

To Exposed Metal
Parts on Set

1 AC
0.]5uF -‚¬15): voltmeter
{0.75 V)

"r' Earth G/ound

F lg. A, Using an AC voltmeter to check AC leakage.