SLV-EX50, SLV-EX80S, SLV-EX90S - Sony VCR Service Manual (repair manual). Page 2

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

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.

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

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

COMPONENTS  IDENTIFIED  BY  MARK 

 OR  DOTTED

LINE  WITH  MARK  

 ON  THE  SCHEMATIC  DIAGRAMS

System
Format

VHS N-PAL, NTSC standard

(SLV-EX50AR/EX80SAR/EX90SAR)

VHS M-PAL, NTSC standard

(SLV-EX50BR/EX80SBR/EX90SAR)

Video recording system

Rotary head helical scanning FM system

Video heads

Double azimuth four heads

(SLV-EX80S/EX90S)

Double azimuth two heads

(SLV-EX50)

Video signal

NTSC color, EIA standards

Tape speed

SP: 33.35 mm/s (1

3/8

 inches/s)

EP: 11.11 mm/s (

7/16

 inches/s)

LP: 16.67 mm/s (

11/16

 inches/s),

playback only

Maximum recording/playback time

8 hrs. in EP mode (with T-160 tape)

Fast-forward and rewind time

Approx. 3 min. (with T-20 tape)

Tuner Section
Channel coverage

VHF 2 to 13
UHF 14 to 69
CATV A-8 to A-1, A to W, W+1 to W+84

Antenna

75-ohm antenna terminal for VHF/UHF

Inputs and Outputs
SLV-EX80S/EX90S:
LINE-1 IN and LINE-2 IN

VIDEO IN, phono jack (1 each)
Input signal:  1 Vp-p, 75 ohms,
unbalanced, sync negative

AUDIO IN, phono jack (2 each)
Input level: 327 mVrms
Input impedance: more than 47 kilohms

LINE OUT

VIDEO OUT, phono jack (1)
Output signal: 1 Vp-p, 75 ohms,
unbalanced, sync negative
AUDIO OUT, phono jack (2)
Standard output: 327 mVrms
Load impedance: 47 kilohms
Output impedance: less than 10 kilohms

SLV-EX50:
LINE-1 IN

VIDEO IN, phono jack (1)
Input signal: 1 Vp-p, 75 ohms,
unbalanced, sync negative
AUDIO IN, phono jack (1)
Input level: 327 mVrms
Input impedance: more than 47 kilohms

LINE-OUT

VIDEO OUT, phono jack (1)
Output signal: 1 Vp-p, 75 ohms,
unbalanced, sync negative
AUDIO OUT, phono jack (1)
Standard output: 327 mVrms
Load impedance: 47 kilohms
Output impedance: less than 10 kilohms

Timer section
Clock

Quartz locked

Timer indication

12-hour cycle

Timer setting

8 programs per month (max.)

General
Power requirements

110-240 V AC, 50/60 Hz
(SLV-EX50BR/EX80SBR/EX90SBR)
220 V AC, 50 Hz
(SLV-EX50AR/EX80SAR/EX90SAR)

Power consumption

14 W (SLV-EX80S/EX90S)
12 W (SLV-EX50)

Operating temperature

5°C to 40°C

Storage temperature

–20°C to 60°C

Dimensions

Approx. 430 x 97 x 292 mm (w/h/d)
including projecting parts and controls

Mass

Approx. 4.1 kg

Power back-up

Built-in self-charging capacitor
Back-up duration: up to 8 hours at a time

Supplied accessories
Remote commander (1)
Size AA(R6) batteries (2)
75-ohm coaxial cable with F-type connectors (1)
Audio/video cable (3-phono to 3-phono)

(SLV-EX80SBR/EX90SBR) (1)

Design and specifications are subject to change
without notice.