Sony ICF-C290 / ICF-C290L Service Manual ▷ View online
– 10 –
– 9 –
4-2.
SCHEMATIC DIAGRAM (EXCEPT E MODEL)
• See page 15 for IC Block Diagrams.
ICF-C290/C290L
– 14 –
– 13 –
4-4.
SCHEMATIC DIAGRAM (E MODEL)
• See page 15 for IC Block Diagrams.
ICF-C290/C290L
– 15 –
• IC Block Diagrams
IC1
CXA1019S
1
2
3
4
5
6
7
8
9
10
15
14
13
12
11
FM
DISCRIMINATOR
AF POWER AMP
AM FE
FM IF
TUNING
METER
AM IF DET AGC
FM FE
23
22
21
20
24
25
19
18 17 16
29 28 27 26
30
GND
GND
AF OUT
VCC
RIPPLE
FIL
TER
AF IN
DET OUT
AFC AGC
AFC AGC
IF GND
METER
N.C
FM IF IN
AM IF IN
FM/AM BAND
SELECT
FM/AM
IF OUT
FE GND
N.C
AM RF IN
FM RF
REG OUT
FM OSC
FM RF IN
AFC
AM OSC
VOL
NF
FM DISCRI
GND
GND
IC2
LM8560N
OSC
CTR
GATE
GATE
D
OUTPUT
CONTROL
COMPARATOR
STAND
BY DET
BLANK
&
FLASH
OUTPUT
DECODER/
DRIVER
INPUT
CONTROL
PWR
UP
1/2
SEC
CTR
CTR
RESET
CONTROL
1/25 OR 1/30
DISPLAY
CONTROL
TIME
HR CTR
CONTROL
ALARM
HR CTR
D
D
D
D
D
SLEEP
CTR
ALARM
MIN CTR
TIME
MIN CTR
SEC RSTYHLD
TIME
SEC
ALARM
SLEEP
28
27
26 25
24
23
22
21
20
18
14
1 – 13
16 15
17
PWR UP
TONE
PWR
UP
50/60Hz
50/60Hz
50/60Hz
50/60Hz
50/60Hz
50/60Hz
2Hz
50/60Hz
T.DISP &
S.SAMPLE
T.RST
AL.RST
SEC DISP
T.DISP
AL.DISP
SL.DISP
TIME &
S.SAMPLE
TIME &
F.SAMPLE
ALARM &
F.SAMPLE
ALARM &
S.SAMPLE
2Hz
F.SAMPLE
S.SAMPLE
50/60Hz
12/24
SELECT
CR
INPUT
50/60
SELECT
50/60
INPUT
SNOOZE
DISPLA
Y
SLEEP
DISPLA
Y
HOUR
SET
MIN
SET
VSS
ALARM
OFF
SLEEP
OFF
ALARM
OUTPUT
VDD
19
ALARM
DISPLA
Y
NC
SEGMENT
OUTPUT
PF.
DET
1kHz
– 16 –
SECTION 5
EXPLODED VIEW
• Items marked “*” are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering these
items.
delay should be anticipated when ordering these
items.
• The mechanical parts with no reference num-
ber in the exploded views are not supplied.
• Accessories and packing materials are given in
the last of the electrical parts list.
NOTE:
• -XX and -X mean standardized parts, so they
may have some difference from the original one.
• Color Indication of Appearance Parts
Example:
KNOB, BALANCE (WHITE) . . . (RED)
KNOB, BALANCE (WHITE) . . . (RED)
↑
↑
Parts Color
Cabinet's Color
• Abbreviation
AUS : Australian
EA : Saudi Arabia
IT
EA : Saudi Arabia
IT
: Italian
SP
: Singapore
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
1
3-018-229-01 KNOB (FUNCTION) (BLACK)
1
3-018-229-11 KNOB (FUNCTION) (WHITE)
2
3-919-270-01 MARKER
3
3-018-230-01 SCALE, DIAL (C290: AEP, IT, EA, SP)
3
3-018-230-11 SCALE, DIAL (C290: AUS, UK, E)
3
3-018-230-21 SCALE, DIAL (C290L)
4
3-018-226-01 CABINET (UPPER) (BLACK)
4
3-018-226-11 CABINET (UPPER) (WHITE)
5
3-018-228-01 BUTTON (BLACK)
5
3-018-228-11 BUTTON (WHITE)
* 6
A-3662-242-A MAIN BOARD, COMPLETE (C290L)
* 6
A-3662-244-A MAIN BOARD, COMPLETE (C290: AUS)
* 6
A-3662-246-A MAIN BOARD, COMPLETE (C290: AEP, SP)
* 6
A-3662-247-A MAIN BOARD, COMPLETE (C290: IT)
* 6
A-3662-248-A MAIN BOARD, COMPLETE (C290: UK)
* 6
A-3662-801-A MAIN BOARD, COMPLETE (C290: EA)
* 6
A-3679-648-A MAIN BOARD, COMPLETE (C290: E)
7
1-535-804-21 SNAP, BATTERY
8
3-919-271-01 HOLDER (ANTENNA) (C290: E)
8
3-922-610-01 HOLDER (ANTENNA) (C290: EXCEPT E/C290L)
9
3-919-267-01 KNOB (TUNE) (C290: E)
9
3-922-609-01 KNOB (TUNE) (C290: EXCEPT E/C290L)
10
3-919-269-01 POINTER
11
3-919-268-01 KNOB (VOL)
* 12
1-654-818-11 POEWR SUPPLY BOARD (C290: E)
13
3-018-227-01 CABINET (LOWER) (BLACK) (C290)
13
3-018-227-11 CABINET (LOWER) (WHITE) (C290)
13
3-018-227-21 CABINET (LOWER) (BLACK) (C290L)
13
3-018-227-31 CABINET (LOWER) (WHITE) (C290L)
14
3-369-135-21 LID, BATTERY CASE
! 15
1-555-795-00 CORD, POWER (C290: AEP, IT, EA, SP/C290L)
! 15
1-558-566-21 CORD, POWER (C290: E)
! 15
1-765-458-11 CORD, POWER (C290: AUS)
! 15
1-769-578-11 CORD, POWER (C290: UK)
17
7-621-770-87 SCREW +P 2.6X5 (C290: E)
18
7-685-649-79 SCREW +P 3X14 TYPE2 NON-SLIT
* 19
3-905-767-01 PLATE, SHIELD (C290L)
D7
1-809-515-11 DIODE LTC-6512PDK2 (C290: AUS, UK, E)
D7
1-809-515-21 DIODE LTC-6512PDK4
(C290: AEP, IT, EA, SP/C290L)
L1
1-501-765-11 ANTENNA, FERRITE-ROD (AM)
(C290: EXCEPT E)
L1
1-501-742-11 ANTENNA, FERRITE-ROD (MW) (C290: E)
L1
1-501-777-11 ANTENNA, FERRITE-ROD (LW) (C290L)
SP1
1-504-748-11 SPEAKER (6.6CM)
! T2
1-427-927-11 TRANSFORMER, POWER (C290: E)
! T2
1-427-928-11 TRANSFORMER, POWER
(C290: EXCEPT E/C290L)
The components identified by mark
! or dotted line with mark ! are
! or dotted line with mark ! are
critical for safety.
Replace only with part number
specified.
Replace only with part number
specified.
not supplied
not supplied
SP1
15
1
15
15
2
4
3
5
18
18
14
18
13
11
10
19
8
17
6
(including
●
A)
7
L1
D7
T2
12
(E model)
●
A (except E model)
9
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