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Specifications ........................................................................... 1
1. SERVICE NOTE ........................................................... 3
2. GENERAL ...................................................................... 4
3. DISASSEMBLY
3-1. Cabinet Rear ASSY, Cabinet Front ASSY ................ 6
3-2. Power Board, P/T In Board, P/T Out Board,
BATT S Board ........................................................... 7
3-3. Tuner Board .............................................................. 7
3-4. Jack Board ................................................................. 7
3-5. Audio Board .............................................................. 8
3-6. CD Board .................................................................. 8
3-7. TC Board ................................................................... 9
3-8. Cabinet Top ASSY .................................................... 9
3-9. H/P Board ................................................................ 10
3-10. TC/M Board ............................................................ 10
3-11. MD Block ASSY ...................................................... 11
3-12. TC LED (L) Board, TC LED (R) Board,
TC Key Board .......................................................... 11
3-13. TC RF Board, Head Relay Board, Belt FR,
Belt BR, Capstan/Reel Motor (M691) .................... 12
3-14. CD Chassis ASSY ................................................... 12
3-15. CD Block Section ................................................... 13
3-16. Loading Board ........................................................ 13
3-17. Tray ASSY, CD ................................................... 14
3-18. Optical Pick-up Block, Pick-up Relay Board ......... 14
3-19. Panel DECO ASSY ................................................ 15
3-20. Control Board, JOG LED1 Board,
JOG LED2 Board .................................................... 15
3-21. Key Board ............................................................... 16
TABLE OF CONTENTS
3-22. BATT Board ........................................................... 16
4. TEST MODE ................................................................ 17
5. ADJUSTMENTS
5-1. Mechanical Adjustmens ............................................ 18
5-2. Electrical Adjustments .............................................. 19
6. DIAGRAMS
6-1. Explanation of IC Terminals ................................... 22
6-2. Block Diagrams (Tape, Main Section) ................... 24
6-3. Block Diagrams (Tuner, CD Section) .................... 27
6-4. Printed Wiring Boards (Main Section) ................... 31
6-5. Schematic Diagram (Main Section) ....................... 35
6-6. Schematic Diagram (CD Section) .......................... 39
6-7. Printed Wiring Boards (CD Section) ...................... 43
6-8. Printed Wiring Boards (Contorl Section) ............... 45
6-9. Schematic Diagram (Control Section) .................... 47
6-10. Printed Wiring Boards (Tuner Section) .................. 51
6-11. Schematic Diagram (Tuner Section) ...................... 52
7. EXPLODED VIEWS
7-1. Rear Cabinet Section ................................................ 60
7-2. Front Cabinet Section ............................................... 61
7-3. CD Block Section ..................................................... 62
7-4. Top Cabinet Section .................................................. 63
7-5. Mechanism Deck Section (1/2) ................................ 64
7-6. Mechanism Deck Section (2/2) ............................... 65
7-7. CD Section ................................................................ 66
7-8. Optical Pick-up Section ............................................ 67
8. ELECTRICAL PARTS LIST ................................... 68
Power requirements
For personal audio system:
120 V AC, 60 Hz
12 V DC, 8 size D (R20) batteries
For memory back-up:
6 V DC, 4 size AA (R6) batteries
For remote control:
3 V DC, 2 size AA (R6) batteries
Power consumption
AC 22 W
Battery life
For personal audio system
FM recording
Sony R20P: approx. 6 h
Sony alkaline LR20: approx. 12 h
Tape playback
Sony R20P: approx. 3 h
Sony alkaline LR20: approx. 6 h
CD playback
Sony R20P: approx. 1.5 h
Sony alkaline LR20: approx. 3 hDimensions (incl. projecting parts)
Approx. 486 x 244 x 177 mm (w/h/d)
(17
1-„10 x 9 3-„5 x 6 9-„10 inches)
Mass (incl. batteries)
Approx. 6.2 kg (13 lb. 11 oz)
Supplied accessories
AC power cord (1)
Remote control (1)
Design and specifications are subject to change without notice.
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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, ob-
serve more than 30 cm away from the objective lens.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
1. Close the tray for CD.
2. Press CD u button.
3. 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.
CAUTION DURING WHEN MOUNTING THE PULLEY
FOR THE LOADING MOTOR
Make the following adjustment when mounting the loading motor
(part number : 1-698-999-11) and motor pulley (part number : 2-
627-174-01) of the CD section.
Specification : A = 0.9 to 1.1mm
SECTION 1
SERVICE NOTE
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH
MARK 0 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.
Flexible Circuit Board Repairing
- Keep the temperature of the soldering iron around 270°C during
repairing.
- Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
- Be careful not to apply force on the conductor when soldering or
unsoldering.
Notes on chip component replacement
- Never reuse a disconnected chip component.
- Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
SAFETY CHECK-OUT (US Model)
After correcting the original service problem, perform the follow-
ing 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 0.5mA (500 microampers).
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 manufacturers 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 limit indication is 0.75V,
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)
AC
voltmeter
(0.75V) To Exposed Metal
Parts on Set
Earth Ground 0.15 µF 1.5k-„¦
Fig. A. Using an AC voltmeter to check AC leakage.
ATTENTION AU COMPOSANT AYANT RAPPORT
Ã- LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
