Sony mdp k 1 service manual

Page 2

Remote Commander RMT-K1A
Principle of operation Infrared pulse
Power requirements 3 V DC, (2 size AA batteries)

Dimensions Approx. 62 X 20 X 175 mm
(w/h/d)
(2 7/16 X 3/4 X 7 inches)
Weight Approx. 130 9 (including batteries),

(4 1/2 oz)
Supplied accessories

Remote Commander RMTAK1A (1)

Size AA (R6) batteries (2)

Coaxial cable with F type connector (1)

Video connecting cord

(phono plug 1 4-» phono plug Yellow 1) (1)
Audio connecting cord

(phono plug 2 4-» phono plug Red/white 2) (1)

Design and specifications are subject to change without
notice.

SAFETY-RELATED COMPONENT WARNING

COMPONENTS IDENTIFIED BY MARK A 0R DDTTED
LINE WITH MARK A ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OVERATION. REPLACE THESE COMPONENTS WITH
SONY 'PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONV.

CAUTION

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

SAFETY CH ECK-OUT

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

I. Check the area of your repair (or unsoldcred 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, par-
ticularly transistors, 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 recommend their replace-
ment,

5. Check the line cord for cracks and abrasion.
Recommend the replacement of any such line
cord to the customer.

6. Check the 13+ 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

To Exposed Metal
ParrxanSet
AC
0.15M gram / Ira/(meter
[0J5Vl

.__l

Earth Glound

Fig. A. Using an AC voltmeter to check AC leakage,

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 0.5 mA (500 microampers) Leakage
current can be measured by any one of three
methods.

I. A commercial leakage tester, such as the
Simpson 229 or RCA WT-S4OA. Follow the
manufacturers' instructions to use these instru-
ments.

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 volt-
meter. The limit" 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
multimeter: that have a 2V AC range are
suitable. (See Fig. A)