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US Model

Canadian Model

AEP Model

UK Model

E Model

Laser: Semiconductor laser

Signal format system:

U.S./Canadian models: NTSC
Eur opean models: PAL/NTSC
Asian models: NTSC/PAL (See the
“Display” section in “Troubleshooting”
to switch systems.)

(Jack name: Jack type/Output level/

Load impedance)

AUDIO OUT L/R: Phonojack/2Vrms/10k

Ω

DIGITAL OUT  (COAXIAL): Phonojack/0.5Vp–p/75

Ω

VIDEO OUT: Phonojack/1.0Vp–p/75

Ω

S-VIDEO OUT: 4-pin mini DIN/

Y: 1.0Vp–p,
C: 0.3Vp–p  (PAL), 0.286Vp–p (NTSC)/
75

Ω

Power requirements:

U.S./Canadian models: 120V, 60Hz
Eur opean/Asian models: 220-240V ,
50/60Hz

Power consumption:  9W

Dimensions (approx.): 190

×135 × 235mm (7× 5 × 9in.)

(w/h/d)

Mass (approx.): 1.3kg (2.9lbs)

Operating temperature: 5

°C to 35 °C (41F to 95F)

Operating humidity: 25-80%

Operating Instructions (1)

Audio/video cord  (1)

Remote (1)

AA (R6)  size  batteries  (2)

EURO AV adaptor  (For European models only) (1)

Design sheet

Specifications and design are subject to change

without notice.

ENERGY STAR

®

 is a U.S.  registered  mark.  As an

ENERGY  STAR

®

Partner, Sony Corporation  has

determined that this product  meets  the ENERGY  STAR

®

guidelines for energy efficiency.

CAUTION

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

0

0

0

The use of optical instrument with this product will increase eye
hazard.

Ω

µ

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 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” indica-
tion is 0.75V, so analog meters must have an accurate low-
voltage scale.  The Simpson 250 and Sanwa SH-63Trd are ex-
amples of a passive VOM that is suitable.  Nearly all battery
operated digital multimeters that have a 2V AC range are suit-
able.  (See Fig. A)

1. Check the area of your repair for unsoldered or poorly-sol-

dered connections.  Check the entire board surface for solder
splashes and bridges.

2. Check the interboard wiring to ensure that no wires are

“pinched” or contact high-wattage resistors.

3. Look for unauthorized replacement parts, particularly transis-

tors, that were installed during a previous repair.  Point them
out to the customer and recommend their replacement.

4. Look for parts which, though functioning, show obvious signs

of deterioration.  Point them out to the customer and recom-
mend their replacement.

5. Check the line cord for cracks and abrasion. Recommend the

replacement of any such line cord to the customer.

6. Check the B+ voltage to see it is at the values specified.

7. Check the antenna terminals, metal trim, “metallized” knobs,

screws, and all other exposed metal parts for AC leakage.
Check leakage as described below.

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

Unleaded solder has the following characteristics.
• Unleaded solder melts at a temperature about 40 ˚C higher than

ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 ˚C .
Caution: The printed pattern (copper foil) may peel away if the

heated tip is applied for too long, so be careful!

• Strong viscosity

Unleaded solder is more viscous (sticky, less prone to flow) than
ordinary solder so use caution not to let solder bridges occur
such as on IC pins, etc.

• Usable with ordinary solder

It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.

Section

Title

Page

Section

Title

Page

Service Note ............................................................................ 4

1.

GENERAL

................................................................... 1-1

2.

DISASSEMBLY

2-1.

LID Assembly Removal ................................................. 2-1

2-2.

Disk Base Assembly Removal ...................................... 2-1

2-3.

Base Unit Removal ........................................................ 2-1

2-4.

BU Holder Removal ....................................................... 2-1

2-5.

SW-370 Board Removal ................................................ 2-2

2-6.

Jack Plate Removal ....................................................... 2-2

2-7.

Lower Case Removal .................................................... 2-2

2-8.

Power Switching Regulator Block Removal .................. 2-2

2-9.

Shield Plate Removal .................................................... 2-3

2-10. AV-65 Board Removal ................................................... 2-3
2-11. IF-95 Board Removal .................................................... 2-3
2-12. MB-103 Board Removal ................................................ 2-3
2-13. Circuit Boards Location ................................................. 2-4

3.

BLOCK DIAGRAMS

3-1.

Overall Block Diagram ................................................... 3-1

3-2.

RF/Servo Block Diagram ............................................... 3-3

3-3.

Signal Processor Block Diagram .................................. 3-5

3-4.

System Control Block Diagram ..................................... 3-7

3-5.

Video/Audio Block Diagram .......................................... 3-9

3-6.

Interface Control Block Diagram ................................... 3-11

3-7.

Power 1 Block Diagram ................................................. 3-13

3-8.

Power 2 Block Diagram ................................................. 3-15

4.

PRINTED WIRING BOARDS AND SCHEMATIC
DIAGRAMS

4-1.

Frame Schematic Diagram ............................................ 4-3

4-2.

Printed Wiring Boards and Schematic Diagrams ......... 4-5
MB-103 Printed Wiring Board ....................................... 4-5
MB-103 (RF AMP, SERVO) Schematic Diagram .......... 4-9
MB-103 (ARP, SERVO DSP) Schematic Diagram ........ 4-11
MB-103 (AV DECODER) Schematic Diagram .............. 4-13
MB-103 (DRIVE) Schematic Diagram .......................... 4-15
MB-103 (SYSTEM CONTROL)
Schematic Diagram ....................................................... 4-17
MB-103 (CLOCK GENERATOR AUDIO D/A
CONVERTER) Schematic Diagram .............................. 4-19
AV-65 Printed Wiring Board .......................................... 4-21
AV-65 (AUDIO/VIDEO OUT) Schematic Diagram ........ 4-23
IF-95 Printed Wiring Board ........................................... 4-25
IF-95 (IF CON) Schematic Diagram ............................. 4-27
SW-370 (FUNCTION SWITCH) Printed Wiring Board
and Schematic Diagram ................................................ 4-29
SW-371 (DOOR SWITCH) Printed Wiring Board
and Schematic Diagram ................................................ 4-31
DPSN-20CP (SWITCHING REGULATOR)
Printed Wiring Board –US, CND– ................................. 4-32
DPSN-20CP (SWITCHING REGULATOR)
Schematic Diagram –US, CND– ................................... 4-33
DPSN-20CP-2 (SWITCHING REGULATOR)
Schematic Diagram –AEP, UK, E– ............................... 4-35
DPSN-20CP-2 (SWITCHING REGULATOR)
Printed Wiring Board –AEP, UK, E– .............................. 4-37

5.

IC PIN FUNCTION DESCRIPTION

5-1.

System Control Pin Function
(MB-103 Board IC104) .................................................. 5-1

6.

TEST MODE

6-1.

General Description ...................................................... 6-1

6-2.

Starting Test Mode ........................................................ 6-1

6-3.

Syscon Diagnosis .......................................................... 6-1

6-4.

Drive Auto Adjustment .................................................. 6-5

6-5.

Drive Manual Operation ................................................ 6-7

6-6.

Emergency History ........................................................ 6-10

6-7.

Version Information ....................................................... 6-11

6-8.

Video Level Adjustment ................................................ 6-11

6-9.

Troubleshooting ............................................................. 6-11

7.

ELECTRICAL ADJUSTMENT

7-1.

Power Supply Check ..................................................... 7-1

7-2.

Adjustment of Video System ......................................... 7-2

1.

Video Level Adjustment ................................................ 7-2

2.

Checking S Video Output S-Y ....................................... 7-2

3.

Checking S Video Output S-C ....................................... 7-2

7-3. Adjustment Related Parts Arrangement ....................... 7-4

8.

REPAIR PARTS LIST

8-1.

Exploded Views ............................................................. 8-1

8-1-1. Disk Base Section .................................................... 8-1
8-1-2. Lower Case Section ................................................. 8-2

8-2.

Electrical Parts List ....................................................... 8-3

• This set can be disassembled in the order shown below.

Set

Lid Assembly

(Page 2-1)

BU Holder

(Page 2-1)

SW-370 Board

(Page 2-2)

Disk Base Assembly

(Page 2-1)

Base Unit

(Page 2-1)

Jack Plate

(Page 2-2)

Lower Case

(Page 2-2)

AV-65 Board

(Page 2-3)

IF-95 Board

(Page 2-3)

MB-103 Board

(Page 2-3)

Shield Plate

(Page 2-3)

Power Switching

Regulator Block

(Page 2-2)

As the laser diode in the base unit is easily damaged by static
electricity, desolder the laser tap of the flexible board of the base
unit when using it.
Before disconnecting the connector, solder first. Before connect-
ing the connector, be careful not to remove the solder. Also take
adequate measures to prevent damage by static electricity. Handle
the flexible board with care as it breaks easily.

Base unit

Laser tap