Sony icf 890 service manual

Page 1

SERVICE MANUAL

ICE-890

US Model

Frequency range

Antennas

Speaker

Power output
Output

Power requirements
Battery lile

Dimensions

Weight
Supplied accessory

SPECIFICATIONS

TV-H (high): channels 7 - 13

TV-L (low): channels 2 - 6

FM: 87 6 -108 MHZ

AM: 530- 1.710 kHz

FM. Telescopic antenna

AM: BuIIHn ferrite bar antenna

Approx. 102 cm (4/a inches) die, 8 $1

430 mW (at 10% harmonic distortion)

Earphone jack (minijack)

120 V AC, 60 Hz with the supplied AC power cord

6 V DC With four size AA (R6) batteries

Approx. 29 hours at listening "or tour hours a day at a
normal volume) usang Sony battery SUM~3 (NS)

Approx. 255 x129 X 626 mm (w/h/d)

(10% x 5le >< 2l2 inches)

incl. projecting parts and controls with the carrying
handle pushed in

Approx. 985 g (2 lb 3 oz) incl batteries

AC power cord (1)

Design and specifications subject to change Without notice.

FEATU RES

' Two different power sources: batleries and house current.
' TONE ContrOI laminates tine tone adjustment.
0 TUNE indicator lights up during radio reception,

SAFETY-RELATED COMPONENT WARNlNG!!

COMPONENTS IDENTIFIED BY MARK A OR DOTTED
LINE WITH MARK A 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 PUB-
LISHED BY SONY.

TV-H/TV-L/FM/AM 4 BAND RECEIVER

SONY.

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lCF-890

SAFETY CHECK-OUT

After correcting the original service problem, 3. Measuring the voltage drop across a resistor by
perform the following safety check before releasing means of a VOM or battery-operated AC volt-
the set to the customer: meter The limit" indication is 0.75 V, so
Check the antenna terminals, metal trim, metallized analog meters must have an accurate low-
knobs, screws, and all other exposed metal parts for voltage scale The Simpson 250 and Sanwa
AC leakage. Check leakage as described below. SH-63Trd are examples of a passive VOM that

is suitable. Nearly all battery operated digital
LEAKAGE TEST multimeters that have a 2V AC range are
snitable. (See Fig A)

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 To Exposed Meta/
not exceed 05 mA (500 microampers). Leakage Pam 0 Set
current can be measured by any one of three
methods.

1. A commercial leakage tester, such as the .~-l
. » AC
Simpson 229 or RCA WT 540A. Follow the 0.15uF :15le mums!
manufacturers instructions to use these instru- (0751/)
mentsr '

2. A" battery-operated AC milliammeter. The Data
reciSion 245 digital multimeter is suitable for ___ Eanh Ground
this Job.

F ig. A, Using an AC voltmeter to check AC leakage.
SECTION 1

GENERAL

This section is extracted lrom
instruction manual.

Radio Operatic

1 POWER switch (ON 3 [OFF 11 )
Press the switch to turn on the radio,
To turn oil the radio, press the switch again.

(9 (earphone) jack w-avy .m- v-umw
(lelt side)

The sound through the speaker does not come
out when the earphone is connected to the lack

AG in (input) lack (left Side) an... we

Speaker

TUNE (tuning) In
The indicator lights up when a station is tuned in,

it?

Dial scales mm-v.-. "AMWHWth. . _,..._ henna!

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Battery compartment (bottom) mw- momma...

nir-

r- ~~~~~~~~~~~ Telescopic antenna

ewe-3 TUNE (tuning) control
Tune in a desired stationr

i

VOL (volume) control
Adjust the volume.
Tum clockwise to increase the volume.

(4

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5 TONE control
Adjust the tone to your preference
Turn clockwise to increase the treble
Turn counterclockwise to increase the bass.

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..... -w/

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2 TV-HlTV-L/FMIAM band selector
Select a desired band.