Sony pmc 212 service manual

Page 1

PMC-212

SERVICE MANUAL AEP Model

CD player section
System
Compact disc digital audio system
Laser diode properties
Material: GaAlAs
Wave length:780 nm
Emission dumtion; Continuous
Laser output: Less than 44.6 uw (This output is the
value measured at a distance of about 200 mm from
the objective lens surface on the optical pick-up
block with 7 mm aperture.)
Spindle speed
200 r/ min (rpm) to 500 r/min (rpm) (CLV)
Number of channels
2
Frequency response
20 - 20,000 Hz +l/-2 dB
Wow and flutter
Below measurable limit

Radio section
Frequency range

FM: 87.6 - )7 ME! (AEP model)
875 r 108 MHZ (lulian model)

AM: 531 - 1,602 kHz

IF
FM: 10.7 MHz
AM: 450 kHz

Aerials
FM: External aerial terminals
AM: External aerial terminals

Model Name Using Similar Mechanism CPD-9
CD . on Mechanism Type KSM-21SBAN
Section
Optical Pick-up Name KSS-21SB
«Mp; Model Name Using Similar Mechanism CFO-9
SSW)" Tape Transport Mechanism Type MF-PMCZ12
SPECIFICATIONS
Cassette-(order section Power consm'nPion
Reoording system V AC. 48 W
4-track 2 channel stereo Dmmsms

Unit: approx, X60 x 237x 292.5 mm (w/h/d)
(o er9 mn Winches)
Speaker: approx. 150 x 230 x 240 mm (w/h/d)

Fast winding time
Approx. 1205 (sea) with Sony cassette C-60

Freqfirsla, liilzornmfl) 80 - 14,000 Hz 96"? V 39 4 he d l )
TYPE ll (high position): so - 15,000 Hz Massm PmmW Pam " m" 5
General approx. 9.4 kg (2011:. 12 oz)
Supplied accessories
SP? 4 . . Remote control (1)
ull range, 10 cm (4 in.) dlflq cone type AM l . l(l)
Inputs °°P 3"

Mixing microphone input jack (minijack): FM "31 (1)

Sensitivity 25 mV

For low impedance microphone
Outputs

Headphones inck (stereo miniiack)

For 16 - 68 ohms impedance headphones
Maximum power output

30 W + 30 W
Power requiremens

For personal component system:

220 - 230 v AC, 50 Hz

For remake commander:

3 V DC, 2 R6 (size AA) batteries

Design and specifications are subiect to change without
notice,

PERSONAL COMPONENT SYSTEM
S ONY®

Page 2

TABLE OF CONTENTS

SERVICING NOTES .......................................................... 2
1. GENERAL. 3
2 DISASSEMBLY ......................................................... 15
3. MECHANICAL ADJUSTMENTS ...................... 17
4 ELECTRICAL ADJUSTMENTS

Tape Deck Section
Tuner Section
CD Section

I9
20

5. DIAGRAMS
5-1. Block Diagram (CD. SYSTEM CONTROL Section) 24

5-2. Block Diagram (Main Section) ...................................... 27
5-3. Printed Wiring Boards
(CD, SYSTEM CONTROL Section) ............................. 30

5-4. Schematic Diagram

(CD, SYSTEM CONTROL Section) 33

5~5. Schematic Diagram (MAIN Section) 38
56. Printed Wiring Boards (MAIN Section) .. 43
5~7. IC Pin Function Description ........................................... 49
6. EXPLODED VIEWS ................................................ 52
7. ELECTRICAL PARTS LIST ............................... 59

CLASS 1 LASER PRODUCT
LUOKAN 1 LASERLAITE

KLASS 1 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.

CAUTION

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

SAFETV-RELATED COMPONENT WARNING

COMPONENTS IDENTIFIED BY 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 SONY.

SERVICING NOTES

CHUCK PLATE JIG ON REPAIRING |

On repairing CD section, playing a disc without the CD lid, use
Chuck Plate Jig.
- Code number of Chuck Plate Jig: X-4918-255-1

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

The laser diode in the optical pick-up block may suffer electro-
static 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.

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 objective lens in the optical
pick-up block. Therefore, when checking the laser diode
emission, observe from more than 25 cm away from the objective
lens.

LASER DIODE AND FOCUS SEARCH OPERATION

CHECK

I. Turn POWER switch on with no disc inserted and make
Function switch to CD position.

2. Open the lid for CD.

3. Turn on S701 as following figure.

4. Press the HI button.

5. Confirm the laser diode emission while observing the
objecting lens. When there is no emission, Auto Power
Control circuit or Optical Pick~up is broken.

Objective lens moves up and down three times for the focus
search.

Laser diode
m;