Sony cdp m 44 service manual

Page 1

CDP-M34/M44

SERVICE MANUAL AEP Model

E Model
Australian Model

GDP-M34

AEP Model
UK Model

GDP-M44

Photo : CDP-M44

Model Name Using Similar Mechanism CDP-l95/295/491
CD Mechanism Type CDMM-SBDBA
Optical Pick-Up Block Type BU-SBDBA

SPECIFICATIONS

Compact disc player General

Frequency response 2 Hz - 20 kHz : 0.5 dB Power requirements Modzezlgor Sgggnigtaéggglfiz

Signal to noise ratio More than 100 dB Model tor the United Kingdom

Dynamic range More than 98 dB 240 V AC, 50/60 HZ

. , t Model lor other countries

Harmonic distortion Less than 0.004% (CDP-M34) 110 120 220 or 240 V AC adjustable
Less than otooss% (CDP-M44) so £0 HZ

Channel separation More than 100 dB

Power consumption 12 W

Outputs Dimensions (approx.v including projections)
355 X 95 X 325 mm (w/h/d)
LINE OUT (FIXED) Output level 2 v (at 50 kllohms) (14 >< 3% X 12% inches)
(phono jacks) Load impedance over 10 kilohms
W ' ht , 3. 1

LINE our (VARIABLE) Output level max 2 v 99 (W ) 2 k9 (7 'bs °Z>
(phono jacks) (at 50 kilohms) M Continued on page 2 -

Load impedance over 50 kilohms
HEADPHONES Output level max. 10 mW This Compact Disc player is
(stereo phone rack) Load impedance 32 ohms

classified as a CLASS 1
cuss 1 LASER PRODUCT LASER product.

LUOKAN 1 LASERLMTE
Kass , 85mm, The CLASS 1 LASER

PRODUCT label is located

on the rear exterior.

COMPACT nlsc PLAYER
SONY;

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CDP-M34/M44

Supplied accessories

Audio cord 1. (2 phono plugs - 2 phono plugs)

Remote commander (only for CDP~M44)
l

R6(size AA) batteries (only for GDP-MM)
2

AC plug adaptor (tor some areas)
1

Remote commander RM-0391 (only for CDP-M44)

Remote control
system

Infrared control

Power requrrements 3 V DC with two R6 (size AA) batteries

Dimensions Approx. 40 X 20X 175 mm (w/ h/d)
(13/4 X /is X 7 inches)
Weight Approx. 95 g (4 oz)

Including batteries

Design and specifications are subject to change without
notice.

PROTECTION OF EYES FROM LASER BEAM DURING SERVICING

This set employs a laser. Therefore, be sure to follow carefully the
instructions below when servicing.

CAUTION

Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous
radiation exposure.

NOTES ON HANDUNG THE OPTICAL PICKUP BLOCK OR
BASE UNIT

The laser diode in the optical pick-up block may suffer electrostatic
breakdown because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic breakdown 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.

1. Laser Diode Properties

' Material: GaAlAs

' Wavelength: 780nm

0 Emission Duration: continuous

' Laser Output: max.44.6p.w*

* This Oulpul is the value measured 81 a distance of about

200mm from the objective lens surface on the Optical Pick-up
Block.

2. During service, do not take the Optical Pick-up Block apart, and
do not adjust the APC circuit. If there is a breakdown in the APC
circuit (including laser diode), replace the entire Optical Pick-
up Block (including APC borad).

SAFETV-RELATED COMPONENT WARNING

COMPONENTS IDENTIFIED BV MARK A OR DOTTED
LINE WITH MARK A 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 PUB-
LISHED BY SONV.