Sony ICF-990L User manual

ICF-990L
SERVICE MANUAL AEP Model
UK Model
ICF-990L is almost same as ICF-880L.
This
manual
contains
only
the
points
which
differ
from
ICF-880L
without
exploded
views.
Please
refer
to
ICF-880L
service
manual
(9-956-178-[])
for
the
information
not
contained
in this
manual.
SPECIFICATIONS
Frequency range:
FM: 87.6 ~ 107.5 MHz
MW: 531 - 1602 kHz
LW: 153 — 255 kHz
SW: 5.95 - 18 MHz
Speaker:
Approx. 10.2 cm (4 1/3 inches) dia. 8Q
Power output:
430 mW(at 10% harmonic distortion)
Output:
® jack (minijack)
Power requirements:
With the supplied ACpower cord:
220 - 230 V AC, 50 Hz
With four R6 (size AA)batteries: 6V DC
Dimensions :
Approx.258 x 133 x 65mm (W/h/d)
(10 !/4x 51/4 x 25/g inches) incl. projecting
parts and control with carrying handle
pushed in.
Mass:
Approx. 1080g (2 Ib 6 oz) incl. batteries
Supplied accessory:
AC power cord(1)
Design and specifications are subject to change
without notice.
FM/SW/MW/LW
4
BAND
RADIO
ON Y.

1. EXPLODED VIEWS
NOTE:
Color Indication
Example:
KNOB, BALANCE (WHITE)... (RED)
Parts Color Cabinet’s Color
Items marked “*” are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when orderin
these items.
(1) CABINET SECTION
® of Appearance Parts
SPi
Ref. No. Part No. Description Remark Ref. No. Part No. Description
1 3+925-935-01 GRILLE (SP) (BLACK) - - - (BLACK) 5 3-925-937-01 CABINET (REAR) (BLACK) -- -
1 3-925-935-11 GRILLE (SP) (WHITE) - - - (WHITE) g 3-925-937-11 CABINET (REAR) (WHITE) --
2 3-925-934-01 SHEET (SP) g 3-925-937-21 CABINET (REAR) (BLACK) - - -
3 3-925-936-01 CABINET (FRONT) (BLACK) - - - (BLACK) g 3-925-937-31 CABINET (REAR) (WHITE) ---
3 3-925-936-11 CABINET (FRONT) (WHITE) - - - (WHITE) 10 3-363-363-01 SPRING, PLUS. MINUS
4 ..' 3-363-372-01 SHAFT (HANDLE) 11 3-925-938-01 BUTTON (PRESET) (BLACK) - - -
5 3-926-910-01 SPRING, CLICK 11 3-925-938-11 BUTTON (PRESET) (WHITE) ---
6 3-363-379-31 HANDLE: (BLACK) - - - (BLACK) 12 3-925-931-01 KNOB (CONTROL) (BLACK) - --
6 3-363-379-41 HANDLE (WHITE) - - - (WHITE) 12 3-925-931-11 KNOB (CONTROL) (WHITE) ---
7 3-363-390-01 LID, PRESET (BLACK) - - - (BLACK) 13 3-925-933-31 PANEL
7 3-363-390-1141 LID, PRESET (WHITE) - - - (WHITE) ANT1 1-501-362-11 ANTENNA, TELESCOPIC (FM)
8 3-363-392-01 LID, BATTERY CASE (BLACK) - - - (BLACK) SP1 1-544-406-11 SPEAKER
8 3-363-392-11 LID, BATTERY CASE (WHITE) -- - (WHITE)
@ The mechanical parts with no reference
number in the exploded views are not
supplied.
@ Hardware (# mark) list and accessories and
packing materials are given in the last of the
electrical parts list.
ANT1
Remark
BLACK) (AEP)
(
(WHITE) (AEP)
(BLACK) (UK)
(WHITE) (UK)
(BLACK)
(WHITE)
(BLACK)
(WHITE)
not supplied

(2) CHASSIS SECTION
Ref. No. Part No. Description
* 51 3-363-391-11 PLATE, BACK
* 52 A-3662-296-A KEY BOARD, COMPLETE (AEP)
* 52 A-3662-302-A KEY BOARD, COMPLETE (UK)
53 3-363-361-01 TERMINAL BOARD, BATTERY
x 54 1-636-867-11 VOLUME BOARD
* 55 3-363-383-01 CHASSIS
56 3-363-371-01 BUTTON (POWER)
57 3-363-364-01 SPRING, MINUS
* 58 A-3679-697-A MAIN BOARD, COMPLETE (AEP)
* 58 A-3679-701-A MAIN BOARD, COMPLETE (UK)
59 3-363-387-01 DRUM (A)
* 60 3-363-397-01 DRUM (B)
61 3-363-366-01 SPRING, DRUM
62
3-364-941-11 SCREW (+B) (2. 6X5), NYLOK
Part No. Description Remark
Ref. No
63 3-363-374-11 KNOB (T) (WHITE) - - - (WHITE)
63 3-363-374-01 KNOB (T) (BLACK) - - - (BLACK)
64 3-363-375-01 SHAFT (TUNING)
65 3-363-367-01 BEARING
66 3-363-373-01 GEAR, MIDWAY
67 3-304-108-00 PULLEY
68 3-363-362-01 SPRING, LEAF
69 4-880-925-01 RETAINER, SPRING
70 3-925-932-01 POINTER
71 3-363-369-01 BELT
72 3-925-930-01 KNOB (BAND) (BLACK) - - - (BLACK)
72 3-925-930-11 KNOB (BAND) (WHITE) - - - (WHITE)
73 3-364-731-01 WASHER, POLY-SLIDER

ICF-990L
2. DIFFERENCE ELECTRICAL PARTS LIST
_ NOTE:
@ Items marked “**” are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering
these items.
ICF-880L
Part No. Description
Part No. Description
* A-3661-212-A KEY BOARD (HAND), COMPLETE
* A-3661-215-A MAIN BOARD (HAND), COMPLETE
(AEP, Germany)
* A-3661-207-A MAIN BOARD (HAND), COMPLETE (UK)
3-363-359-01 PLATE, CONTACT, SPEAKER
1-554-980-31 SWITCH, KEY BOARD (FM1)
1-554-980-31 SWITCH, KEY BOARD (FM2)
1-554-980-31 SWITCH, KEY BOARD (FM3)
1-554-980-31 SWITCH, KEY BOARD (MANUAL)
A\1-450-325-11 TRANSFORMER, POWER (UK)
3. ACCESSORIES & PACKING MATERIALS AND HARDWARE LIST
S101
Ref. No. Part No. Description Remark
ACCESSORIES & PACKING MATERIALS
A oe iooiok dtotitok tok kkk tck dokok
AN 1-590-866-21 CORD, POWER (UK)
A 1-696-562-11 CORD, POWER (AEP)
3-800-173-11 MANUAL, INSTRUCTION (ENGLISH, FRENCH,
GERMAN, SPANISH, DUTCH, SWEDISH, PORTUGUESE)
* 3-925-947-01 INDIVIDUAL CARTON
BAR AR AO EAE EAA AA EA EERE EAE NARA RTARTA ITA RARE ARIE
FO OR ok kok fo ake ok ook ek ge tok yooh
HARDWARE LIST
Se eo eo eto bok tok top
ICF-990L
* A-3662-296-A KEY BOARD, COMPLETE (AEP)
* A-3662-302-A KEY BOARD, COMPLETE (UK)
* A-3679-697-A MAIN BOARD, COMPLETE (AEP)
* A-3679-701-A MAIN BOARD, COMPLETE (UK)
1-553-856-00 SWITCH, KEY BOARD (FM1)
1-553-856-00 SWITCH, KEY BOARD (FM2)
1-553-856-00 SWITCH, KEY BOARD (FM3)
1-553-856-00 SWITCH, KEY BOARD (MANUAL)
A\1-450-324-11 TRANSFORMER, POWER
The components identified by
#1 7-685-134-19 SCREW +P 2.6X8 TYPE2 NON-SLIT
#2 7-623-508-01 LUG, 3
#3 7-685-647-79 SCREW +P 3X10 TYPE2 NON-SLIT
#4 7-685-651-79 SCREW +BIP 3X20 TYPE2 N-S
#5 7-671-112-11 BALL, STEEL
A\ are critical for safety.
Replace only with part number
specified.
mark A\ or dotted line with mark.
English
95G0551-1
Sony Corporation Printed in Japan
Consumer A&V Products Company © 1995. 7
9-960-307-11 Personal A&V Products Div. Published by Home A&V Products Div.
eee
Quality Engineering Dept.

ICF-880L
SERVICE MANUAL AEP Model
UK Model
Photo : WHITE
SPECIFICATIONS
Frequency range FM: 87.6 —- 107.5 MHz (AEP/UK model)
; 87.6 —108MHz (Germany model )
MW: 531-1602 kHz
LW: 153-255 kHz
SW: 5.95 ~— 18 MHz
intermediate frequency FM: 10.7 MHz
AM: 455 kHz
Antennas FM/SW: Telescopic antenna
AM (MW)/LW: Built-in ferrite bar antenna
Speaker Approx. 10.2 cm (4'/, inches) dia., 8 ohms
Power output 430 mW (at 10% harmonic distortion)
Output Earphone jack (minijack)
Power requirements With the supplied AC power cord:
UK model: 240 V AC, 50 Hz
AEP/Germany model: 220 V AC, 50 Hz
With four R6 (size AA) batteries: 6 V OC
Battery life Manual tuning: Approx. 35 hours using Sony batteries SUM-3 (NS)
Preset tuning: Approx. 15 hours using Sony batteries SUM-3 (NS)
Dimensions Approx. 255 x 129 x 62.6 mm (w/hid)
(10%, x 5'/, x 2p inches)
incl. projecting parts and controls with carrying handle pushed in
Weight Approx. 1025 g (2 Ib 41/, oz) incl. batteries
Supplied accessory AC power cord (1)
Design and specifications subject to change without notice.
MODEL IDENTIFICATION
—- Model Number Portion —
SONY MODEL NO. ICF-880L
FM/MW/LW/SW 4BANDS
- Carved on rear cabinet
AEP,Germany model: AC220V ~ 50Hz 4W © FM/MW/LW/SW
* Model number | abel
UK model: AC240V ~ 50Hz 4W 4 BAND RECEIVER
ONY.

ICF-880L
SECTION 1
GENERAL
This section is extracted
from instraction manual.
ARPaeimeomeeniiin ts
[11] MANUAL (manual tuning) button
[4] FM preset tuning controls (rear)
[2] Carrying handle [12] TUNE (tuning) control
[3] POWER switch (ON = /STANDBY [13] VOL (volume) contro!
oa) Turn clockwise to increase the
[4] @ (earphone) jack (left side) volume.
The sound through the speaker TONE control
cannot be heard when an earphone Turn clockwise to increase the
is connected to the jack. treble.
[5] AC IN (input) jack (left side) Turn counterclockwise to decrease
the treble.
Speaker [15] FM preset tuning indicators
Battery compartment (bottom) [16] Band selector FM/MW/LW/SW
| 6 |
Zs
8 | TUNE (tuning) indicator .
' 17} Dial scales
9
0
Telescopic antenna
—
FM preset buttons (FM 1-3)
it
Power Sources
[B] Batteries
Battery replacement
When the sound becomes weak or distorted, replace all the batteries with new ones.
Concerning the battery life, see 'Specifications”.
Note
If the unit is not to be used on batteries for a long period of time, remove them to avoid battery
leakage and corrosion.
[C] House Current
[®] Radio Operation |
1 Depress the POWER switch (<) to turn on the unit.
2 Select a desired band.
3 Tune in a desired station.
4 Adjust the volume.
5 Adjust the tone to your preference,
The TUNE indicator lights up when a station is tuned in.
To turn off the radio, press the POWER switch (a).
Note
While the FM preset indicator is being lit, you cannot use the manual tuning. !f you tune in a
Station manually, press the MANUAL button again.
[E] Preset Tuning
How to Preset
You can preset up to 3 FM stations (one station for each. FMi, FM2, and FM@ buttons).
1 Preset FM1 button.
2 Turn the VOL contro! a little to get sound.
3 Tune in a desired FM station using the FM1 preset tuning control.
Turn the control toward MAX for higher frequencies, and toward MIN for lower
frequencies.
When the station is tuned in, the TUNE indicator will light up.
The station is now preset.
Preset on the FM2 and FM3- buttons in the same way.
4 Adjust the volume.
To change the preset station
Preset a new station on a desired button.
To Tune in a Preset Station
The desired FM station will be received simply by pressing the FM1, FM2, or FM3
button after pressing.
To turn off the radio, press the POWER switch (1).
When you turn on the radio again, the station previously tuned in manually will be
received.
For private listening, connect an earphone to the © jack.
[F| To Improve Receiving Condition
FM -
Extend the telescopic antenna and adjust its length, direction and angle for the best
reception.
MW/LW
Since the reception is affected by the direction of the radio, rotate the unit horizontally
for optimum reception.
sw
Extend the telescopic antenna vertically.
Notes
* In vehicles or in buildings, radio reception may be difficult or noisy. Try listening near a window.
* Keep the radio away from the metallic objects.
How to use the carrying handle
Utilisation de la paignée de transport
Verwendung des Tragegriffs
Cémo emplear el asa de transporte
1
FM/UKW
To install To remove
Pour installer Pour retirer
Einiegen Herausnehmen
Para colocarias Para exiraerlas
Four R6 (size AA) batteries
Quatre piles R6 (format AA)
Vier Mignonzelten (Fi6)
Cuatro pilas A (tamaio AA}
to the AC IN jack
& la prise AC IN
an AC IN-Buchse
ata toma AC IN
to @ wall outlet
a une prise murale
an eine Wandsteckdose
a una toma de la red
—_
AC power cord (supplied)
Cordon o'alimentation secteur (fourni)
Neatzkabel (mitgelietert)
Cable de alimentacién de CA (suministrado)
fear
arriére
/ Riickseite
posterior
AM (MWY)LW

SECTION 2
DIAL POINTER FITTING
Note : Follow the dial pointer fitting procedure in the numerical over given.
1. INSTALL DRUM(1 )
drum (B)
Rotate the drum (B) in arrow @) direction
while inserting it into the drum (A) as
shown tn the figure,
drum (A)
2. INSTALL DRUM(2)
@ Confirm that the drum hole is not dislocated.
@® Adjusting the position as shown, attach the drum to the CV1.
@ screw(+B2.6x5)
1) Turn fully the CV1 toward arrow @®
3. INSTALL DRUM SPRING
drum spring

4. INSTALL BELT
5. INSTALL BACK PLATE
6. INSTALL DIAL POINTER
@ Fix the pointer and belt.
© isp cutnie @ Aligning the positions @ and ®, attach the pointer
locking compound.

MW/4LW/SW
BAND switch : MW/LW/SW
AM RF signal
generator (MW, LW)
30% amplitude
modulation
by 400Hz signal
output level:as low as possible.
AM RF signal
generator (SW)
30% amplitude
modulation
by 400Hz signal
output level:as low as possible.
[MAIN BOARD]
(CONDUCTOR SIDE)
SECTION 3
ELECTRICAL ADJUSTMENT
Put the lead wire
antenna close
to the set.
SW antenna
input land
ee
SW RF signal
generator
BAND switch : FM
FM RF signal
generator
input terminal
Ca» 0.01 uF Eon
£22, 5kHz frequency deviation
by 400Hz signal
output level:as low as possible. VTVW
(range:0. 5-5V ac)
telescopic antenna
322
\
@®) jack (earphone)
Note : LW adjustment should be made
after making MW adjustments. (#1)
Repeat the procedures in each adjustment
several times, and the frequency coverage
and tracking adjustments should be finally
done by the trimmer capacitors.
AM IF ADJUSTMENT
Adjust for a maximum reading on VTVM,
| 12 | A55KH2
| MW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on VTVM.
L9 920kHz
| CT7 1, 650kHz
MW TRACKING ADJUSTMENT
Adjust for a maximum reading on VTVM.
L4-MW 620kHz
CT2 1, 400kHz
LQ MW Frequency Coverage
L10 SW Frequency Coverage
CT2 MW Tracking
LT FM Tracking
CT5 FM Tracking
CT7 MW Frequency Coverage
CT6 FM Frequency Coverage
SW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on VTVM.
L10 5. 850. 1MHz
CT9 18. 20. IMHz
SW TRACKING ADJUSTMENT
Adjust for a maximum reading on VIVM.
5. 85-40. 1MHz
18.20. 1MHz
t
—
LW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on VTVM.
CT8 145kHz
CHECK | 260kHlz & MORE
tt
*] LW TRACKING ADJUSTMENT
Adjust for a maximum reading on VTVM.
L4-LW 160kHz
CT3 240kHz
FM IF ADJUSTMENT
Adjust for a maximum reading on VTVM.
Th 10. 7MHz
{Adjustment Location]
L4-MW MW Tracking CT3 LW Tracking
CT1 FM Frequency
Coverage Preset
(MAIN BOARD]
(CONDUCTOR SIDE)
i
L&8 FM Frequency Coverage
L5 SW Tracking
CT9 SW Frequency Coverage
CT4 SW Tracking
CT8 LW Frequency Coverage
L4-LW LW Tracking
Le
| ICF-880L
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on VTVM.
Germany model:87. 35-40. IMHz
Others model :87. 35MHz
C16 Germany mode! :108. 050. 4MHz
Others model: 108. OSMHz
L8
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on VTVM.
L7 87. 35MHz
Set PRESET Switch S101 to “ FM Ich ”.
FM FREQUENCY COVERAGE PRESET ADJUSTMENT
Adjust for a maximum reading on VTVM.
Germany model :87. 350. IMHz
Others mode!:87, 35MHz
Germany model:108. 050. 4MHz
Others model: 108. O5MHz
RV204
oO 4 —
RV204 FM Frequency Coverage Preset
{VOLUME BOARD]
(COMPONENT SIDE)
+)
[|
Tl FM IF
T2 AM IF

SECTION 4
DIAGRAMS
® Semiconductor Locations 4-1. Printed Wiring Boards
ae |
Ref. No. Location | Ref, No Location
L +— i 4 5 6 t | 8 | 9 10
D1 D-9 Q1 E-4
D2 D-4 Q2 D-5
D
3
D-3
Q
3
Boa
(VOL
D5
D-5
Q4
G-2
ag
D6 E-6 Q5 E-6§
D7
E-6§
Q6
F-6
,
D 8 D-8 Q7 F-4
0 9 E-8 Q 8 E-6
D10 E-8 QQ E-6
D1 3 G-8 Q10 D-8
D14 G-8 Q11 E-8
D15 D-6 Q12 E-8 zi
D101] A-5 Q13 E-8
D102] A-4 Q15 F-6
Bet0-o ASS Qio0t] B-4
D104!
B-4
a
02
Bs
sa
D105
B-4
103
~3
L4
speci
TELESCOPIC
ANTENNA
D106] B-3 Qi04]| B-3 [MAIN BOARD] Pee eee oi
D107]
A-38
Q201
B-10
cone
/
Q?027) B=1-0
IC 1 D-4 Q203] B-10
IC 2 E-4
IC3 E-7
IC
4
E-7
J2
IC5
E-6
et
—
I
©)
IC2
0
1
B-9
EARPHONE
sl ing ae Nin Se Gate toon er
SPI
SPEAKER aie
18 DRY ee.
Rice DESGNATION )
SIZE "AA" R6
4Pcs 6V
Note:
* O—— :parts extracted from the component side.
—jJ= — 3—
4-2. Schematic Diagram
1C201
Fit, 2, 350
(C204 (2/5)
oPD406686
wi | [MAIN BOARD]
TELESCOPIC
ANTENNA
O—-7
o
j
>
1
iz
pte
3
in
:
]
op
5.9
.
=
J
ici
;
ih
ans
(©
s1-5
w
{gs
1C20%
(3/5)
$1-3
cl
>
u
=
360>
$1-6
Cage],
:
Pac
wl
et
oi
2a
Pat
:
en ee
lex (4/5) i
sPD40668G
G) ro (4)
16201 (1/5)
aPpsoccag
Vss
esas eae
6) |
|
Ll
(C204 (8/5) Ot
0P0 406680 18S226
FREQUENCY
COVERGE
AY204
106
[KEY BOARD}
A121.2.24 |
ut :
|
|
1
(rune) S, sities
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(ec DESLONAT ION)
4pcs.6¥
Note: ;
-
All
capacitors
are
in
wF
unless
otherwise
noted,
pF:
u
uF
*
Voltage
is
de
with
respect
to
ground
under
no-signal
(detuned)
50WV or less are not indicated except for electrolytics conditions.
and tantalums. no mark: FM
- All resistors are in Q and % Wor tess unless otherwise ( ) MW
speci fied, < > LW
. A :internal component. C ] :SW
- Voltages are taken with a VOMCinput impedance 10MQ).
Voltage variations may be noted due to normal production
Note: The components identified by mark A or dotted
line with mark A are cirtical for safety. ees
Replace only with part number speci fied. " otgnal patn.
ef => :FM
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15