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TABLE OF CONTENTS
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH
MARK ! 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
PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
Ë LA SƒCURITƒ!
LES COMPOSANTS IDENTIFƒS PAR UNE MARQUE ! SUR LES
DIAGRAMMES SCHƒMATIQUES ET LA LISTE DES PIéCES SONT
CRITIQUES POUR LA SƒCURITƒ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIéSES SONY
DONT LES NUMƒROS SONT DONNƒS DANS CE MANUEL OU
DANS LES SUPPƒMENTS PUBLIƒS PAR SONY.
After correcting the original service problem, perform the
following safety checks before releasing the set to the customer:
Check the antenna terminals, metal trim, ÒmetallizedÓ knobs, screws,
and all other exposed metal parts for AC leakage. Check leakage as
described below.
LEAKAGE
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 0.5 mA (500 microamperes).
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturersÕ instructions to use these
instruments.
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 voltmeter. The ÒlimitÓ 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)
SAFETY CHECK-OUT
1. SERVICE NOTE ............................................................... 3
2. GENERAL .......................................................................... 4
3. DISASSEMBLY3-1. Front Cabinet Assy ........................................................... 12
3-2. Mechanisum Assy ............................................................. 13
3-3. Control Board, Lump Board, H/P Board .......................... 14
3-4. CD Block Assyt, Handole ................................................ 14
3-5. Main Board, Optical Pick up ............................................ 15
3-6. Tuner Board, Power Board, Rear Cabinet ........................ 15
4. TEST MODE ..................................................................... 16
5. MECHANICAL ADJUSTMENTS ............................. 16
6. ELECTRICAL ADJUSTMENTS ............................... 17
7. DIAGRAMS7-1. Circuit Boards Location ................................................... 20
7-2. Brock Diagrams Ð Tuner/CD Section Ð ........................... 21
7-3. Brock Diagrams Ð TC Section Ð ...................................... 23
7-4. Printed Wiring Board ÑMain Section Ñ ........................ 26
7-5. Schematic Diagram ÑMain Section (1/2) Ñ .................. 29
7-6. Schematic Diagram ÑMainl Section (2/2) Ñ ................. 32
7-7. Printed Wiring Board ÑPower Section Ñ ...................... 35
7-8. Schematic Diagram ÑPower Section Ñ ......................... 37
7-9. Printed Wiring Board ÑControl/Switch Section Ñ ........ 39
7-10. Schematic Diagram ÑControl/Switch Section Ñ ........... 43
7-11. Printed Wiring Board
ÑTuner Section (US, CND model) Ñ ............................ 45
7-12. Schematic Diagram
ÑTuner Section (US, CND model) Ñ ............................ 47
7-13. Schematic Diagram
ÑTuner Section (AEP, IT, UK, E model) Ñ ................... 50
7-14. Printed Wiring Board
ÑTuner Section (AEP, IT, UK, E model) Ñ ................... 53
7-15. Schematic Diagram ÑTC Section Ñ .............................. 55
7-16. Printed Wiring Board ÑTC Section Ñ ........................... 57
7-17. IC Pin Function ................................................................ 58
7-18. IC Brock Diagrams ........................................................... 60
8. EXPLODED VIEWS8-1. Cabinet Section ................................................................. 64
8-2. Rear Cabinet Section ........................................................ 65
8-3. CD Mechanism (KSM-213CDM/M-S) ............................ 66
8-4. Optical Pick up ................................................................. 67
8-5. Cassette Mechanism Deck Section-1 (MF-D55-144) ...... 68
8-6. Cassette Mechanism Deck Section-2 (MF-D55-144) ...... 69
9. ELECTRICAL PARTS LIST ........................................ 70
To Exposed Metal
Parts on Set
0.15
µF
1.5 k ½
AC
Voltmeter
(0.75 V)
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
Battery life
For CD radio cassette-corder
FM recording
Sony R20P: approx. 6 h
Sony alkaline LR20: approx. 12h
Tape playback
Sony R20P: approx. 3h
Sony alkaline LR20: approx. 6h
CD playback
Sony R20P: approx. 1.5 h
Sony alkaline LR20: approx. 3h
Dimmensions (incl. projecting parts)
Approx. 416 x 198.5 x 246 mm (w/h/d)
(16 1/2 x 7 7/8 x 9 3/4 inches)
Mass (incl. batteries) Approx. 5.2 kg (11 lb. 7 oz)
Supplied accessories AC power cord (1)
Remote commander (1)
Design and specifications are subject to change without notice.
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This appliance is classified as a CLASS 1
LASER product. The CLASS 1 LASER
PRODUCT MARKING is located on the rear
exterior.
The following caution label is located inside the
unit.
The laser component in this product is
capable of emitting radiation exceeding the
limit for Class 1.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation
exposure.
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 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 30 cm away from the objective lens.
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
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
1. Press CD open knob.
2. Open the lid for CD.
3. Push on SWITCH as following figure.
4. 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 once for the focus search.
SECTION 1
SERVICING NOTE
Insert a precision screw driver
and push SWITCH