ICF-C135
SERVICE MANUAL
Ver 1.0 1999.10
SPECIFICATIONS FEATURES
US Model
Canadian Model
MICROFILM
FM/AM CLOCK RADIO
SECTION 1
r
SERVICING NOTES
SAFETY CHECK-OUT
After correcting the original service problem, perform the following
safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs, screws,
and all other exposed metal parts for AC leakage.
Check leakage as described below.
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.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instruments.
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 V OM
or battery-operated AC voltmeter. 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 e xamples of a
passive VOM that is suitable. Nearly all battery operated digital
multimeters that have a 2 V AC range are suitable. (See Fig. A)
To Exposed Metal
Parts on Set
HOW TO CHANGE THE FM CERAMIC FILTERS
This model is used two ceramic filters of CF1 and CF3.
You must use same type of color marked ceramic filters in order to
meet same specifications.
Therefore, the ceramic filter must change two pieces together since
it's supply two pieces in one package as a spare parts.
Center
frequency
mark 1
mark 2
CF1
mark 2
Mark 1 Mark 2
CF3
red — 10.70MHz
blue — 10.67MHz
orange — 10.73MHz
black — 10.64MHz
white — 10.76MHz
white white 10.75 MHz
yellow — 10.79 MHz
CORD DRESSING
(POWER, ANTENNA, BATTERY)
1) Connect the power cord, antenna cord, and battery cord as
shown in the figure.
2) Mount the chassis with screws (PTP3 × 10).
Note: Tighten completely the screws (PTP3 × 10).
1.5 k
0.15 µF
Fig. A. Using an AC voltmeter to check AC leakage.
Ω
Earth Ground
AC
voltmete
(0.75 V)
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be damaged by heat.
screw (PTP3
×
battery cord
antenna cord
power cord
chassis
10)
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED
LINE WITH MARK 0 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
PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0
SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE
DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ
DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY DONT LES
NUMÉROS SONT DONNÉS DANS CE MANUEL OU D ANS
LES SUPPLÉMENTS PUBLIÉS PAR SONY.
— 2 —
SECTION 2
GENERAL
This section is extracted from
instruction manual.
— 3 —
SECTION 3
DIAL POINTER SETTING
Note: Follow the assembly procedure in the numerical order given.
8
RADIO board
7
Turn CV1 and RV1 shaft in
the arrow direction fully.
CV1
2
Set the pointer to
the guide line.
pointer
1
pointer
guide line
6
3
speaker
chassis
4
screw
(P3
×
10)
RV1
RADIO board
(Conductor Side)
knob (TUNE)
knob (VOL)
marking
marking
5
A
B
As shown in figure,
marking
knob and marking
of VOL knob setting.
A
of TUNE
B
— 4 —
SECTION 4
r
r
Y
ELECTRICAL ADJUSTMENTS
[FM]
Setting:
BAND switch: FM
FM RF signal generator
0.01
22.5 kHz frequency
deviation by 400 Hz
signal
FM lead wire antenna terminal
µ
F
set
speaker terminal
level mete
+
–
[AM]
Setting:
BAND switch: AM
Put the lead-wire
AM RF SSG
30% amplitude
modulation by
400 Hz signal
Output level: as low as possible
antenna close to
the set.
set
level mete
+
–
speaker terminal
Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally done
by the trimmer capacitors.
• Adjusting Location: RADIO board (Component Side)
L1:AM TRACKING
ADJUSTMENT
T1:AM IF
ADJUSTMENT
L4:FM FREQUENCY
COVERAGE
ADJUSTMENT
CT3:FM TRACKING
ADJUSTMENT
CT1:AM TRACKING
ADJUSTMENT
IC1
CT2:AM FREQUENC
COVERAGE
ADJUSTMENT
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L4 CT4
86.5 MHz 109.5 Hz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
CT3
Frequency max
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L2 CT2
520 kHz 1,750 kHz
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1 CT1
600 kHz 1,400 kHz
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
455 kHz
CT4:FM FREQUENCY
COVERAGE
ADJUSTMENT
Clock Frequency Check
Confirm that the reading on the frequency counter is 900 Hz.
L2:AM FREQUENCY
COVERAGE
ADJUSTMENT
+ 200
– 100
If frequency is higher, change capacitor value of C101.
If frequency is lower, change resistor value of R101.
frequency counter
10 pF
+
–
IC101 pin
wj
— 5 — — 6 —
ICF-C135
5-1. PRINTED WIRING BOARDS
SECTION 5
DIAGRAMS
• Semiconductor
Location
Ref. No. Location
D101 F-4
D201 F-6
D202 F-6
D203 C-7
D204 G-4
D205 G-3
IC1 D-4
IC101 G-4
LED101 H-4
Q1 F-2
Q201 D-6
Q202 D-7
Note on Printed Wiring Boards:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
• W : indicates side identified with part number.
f
•
• b : Pattern from the side which enables seeing.
: internal component.
— 7 — — 8 —
5-2. SCHEMATIC DIAGRAM
1
2 345 6 7 8 9 10 1514131211
FM
DISCRIMINATOR
AF POWER AMP AM FE FM IF
TUNING
METER
AM IF DET AGC
FM FE
23 22 21 202425 19 18 17 1629 28 27 2630
GND
GND
AF OUT
VCC
RIPPLE
FILTER
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
ICF-C135
• IC Block Diagram
IC1 CXA1019S
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and 1/
specified.
f
•
: internal component.
4
W or less unless otherwise
• C : panel designation.
Note:
The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part
number specified.
Note:
Les composants identifiés par
une marque 0 sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce portant le numéro
spécifié.
• U : B+ Line.
• H : adjustment for repair.
• Voltages are dc with respect to ground under no-signal
(detuned) conditions.
no mark : FM
( ) : AM
: Impossible to measure
∗
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production tolerances.
• Signal path.
F : FM
f : AM
— 9 — — 10 —
SECTION 6
d
EXPLODED VIEWS
RADIO
SECTION 7
ELECTRICAL PARTS LIST
NOTE:
• -XX and -X mean standardized parts, so they
may have some difference from the original
one.
• Items marked “*” are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering
these items.
• The mechanical parts with no reference number in the exploded views are not supplied.
• Accessories and packing materials are given
in the last of the electrical parts list.
A
The components identified by mark 0 or
dotted line with mark 0 are critical for safety.
Replace only with part number specified.
Les composants identifiés par une marque
0 sont critiques pour la sécurité.
Ne les remplacer que par une pièce portant
le numéro spécifié.
5
6
7
not supplied
#1
9
not supplie
10
not supplied
T101
not supplied
(PRIMARY board)
not supplied
SECONDARY
board
3
8
SP1
1
(including A)
14
2
11
12
#2
#2
Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks
1 3-040-753-01 HOLDER (LED)
2 3-040-750-01 PANEL, FRONT
3 3-012-759-21 BUTTON (FUNC.)
5 3-938-064-21 KNOB(FUNCTION)
6 3-938-059-41 CABINET (UPPER)
* 7 A-3663-419-A RADIO BOARD, COMPLETE
8 3-919-268-01 KNOB(VOL)
9 3-930-828-01 KNOB(TUNING)
10 3-040-752-01 POINTER
13
11 3-369-135-21 LID,BATTERY CASE
12 3-938-058-41 CABINET (LOWER)
13 3-368-852-01 FOOT
014 1-783-817-11 CORD, POWER
SP1 1-504-748-21 SPEAKER (6.6CM)
0T101 1-435-201-11 TRANSFORMER, POWER
#1 7-685-647-79 SCREW +P 3X10 TYPE2 NON-SLIT
#2 7-685-154-19 SCREW +P 3X35 TYPE2 NON-SLIT
NOTE:
• Due to standardization, replacements in the
parts list may be different from the parts
specified in the diagrams or the components
used on the set.
• -XX, -X mean standar dized parts, so they
may have some difference from the original
one.
• Items marked “*” are not stocked since they
are seldom required for routine service.
Some delay should be anticipated when
ordering these items.
Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks
* A-3663-419-A RADIO BOARD, COMPLETE
**********************
1-535-804-11 SNAP, BATTERY
3-922-610-01 HOLDER (ANTENNA)
< CAPACITOR >
C1 1-163-088-00 CERAMIC CHIP 5PF 50V
C2 1-163-233-11 CERAMIC CHIP 18PF 5% 50V
C3 1-163-102-00 CERAMIC CHIP 24PF 5% 50V
C4 1-163-251-11 CERAMIC CHIP 100PF 5% 50V
C5 1-163-031-11 CERAMIC CHIP 0.01uF 50V
C6 1-126-964-11 ELECT 10uF 20% 50V
C7 1-163-031-11 CERAMIC CHIP 0.01uF 50V
C8 1-126-963-11 ELECT 4.7uF 20% 50V
C9 1-126-963-11 ELECT 4.7uF 20% 50V
C10 1-126-964-11 ELECT 10uF 20% 50V
C11 1-163-033-91 CERAMIC CHIP 0.022uF 50V
C12 1-163-809-11 CERAMIC CHIP 0.047uF 10% 25V
C13 1-128-551-11 ELECT 22uF 20% 25V
C14 1-163-038-91 CERAMIC CHIP 0.1uF 25V
C15 1-126-924-11 ELECT 330uF 20% 10V
C16 1-164-505-11 CERAMIC CHIP 2.2uF 16V
C18 1-126-924-11 ELECT 330uF 20% 10V
C19 1-163-031-11 CERAMIC CHIP 0.01uF 50V
C20 1-163-220-11 CERAMIC CHIP 3PF 0.25PF 50V
C30 1-162-282-31 CERAMIC 100PF 10% 50V
C31 1-162-600-11 CERAMIC 0.0047uF 20% 16V
C101 1-163-019-00 CERAMIC CHIP 0.0068uF 10% 50V
C102 1-163-021-91 CERAMIC CHIP 0.01uF 10% 50V
C103 1-163-031-11 CERAMIC CHIP 0.01uF 50V
C104 1-163-038-91 CERAMIC CHIP 0.1uF 25V
C107 1-126-963-11 ELECT 4.7uF 20% 50V
C201 1-163-031-11 CERAMIC CHIP 0.01uF 50V
C202 1-163-031-11 CERAMIC CHIP 0.01uF 50V
C203 1-126-934-11 ELECT 220uF 20% 16V
C204 1-163-031-11 CERAMIC CHIP 0.01uF 50V
C205 1-163-031-11 CERAMIC CHIP 0.01uF 50V
C206 1-126-925-11 ELECT 470uF 20% 10V
C207 1-104-665-11 ELECT 100uF 20% 10V
< FILTER >
CF1 1-577-324-11 FILTER, CERAMIC
CF2 1-577-072-11 FILTER, CERAMIC
CF3 1-577-324-11 FILTER, CERAMIC
< CONNECTOR >
* CN701 1-568-272-11 SOCKET, CONNECTOR 6P
• CAPACITORS:
uF: µF
• RESISTORS
All resistors are in ohms.
METAL: metal-film resistor
METAL OXIDE: Metal Oxide-film resistor
F: nonflammable
• COILS
uH: µH
When indicating parts by reference number,
please include the board name.
CT1-4 1-141-522-11 CAP, VAR
CV1 1-141-522-11 CAP, VAR (TUNING)
D1 8-719-911-19 DIODE 1SS119
D2 8-719-911-19 DIODE 1SS119
D101 8-719-911-19 DIODE 1SS119
D201 8-719-911-19 DIODE 1SS119
D202 8-719-052-88 DIODE 1N4002
D203 8-719-911-19 DIODE 1SS119
D204 8-719-052-88 DIODE 1N4002
D205 8-719-052-88 DIODE 1N4002
IC1 8-752-037-02 IC CXA1019S
IC101 8-759-821-46 IC LM8560N
JC1 1-216-295-91 SHORT 0
L1 1-754-099-11 ANTENNA, FERRITE-ROD (MW)
L2 1-406-028-00 COIL, OSC (MW)
L4 1-428-229-11 COIL, AIR-CORE
LED101 8-749-016-86 LED SL-3998-78T
Q1 8-729-119-76 TRANSISTOR 2SA1175-HFE
Q201 8-729-011-92 TRANSISTOR 2SC2001TP-K1K2
Q202 8-729-119-76 TRANSISTOR 2SA1175-HFE
R2 1-216-017-91 RES-CHIP 47 5% 1/10W
R4 1-216-057-00 METAL CHIP 2.2K 5% 1/10W
R5 1-216-057-00 METAL CHIP 2.2K 5% 1/10W
R101 1-216-105-91 RES-CHIP 220K 5% 1/10W
R102 1-216-097-91 RES-CHIP 100K 5% 1/10W
R103 1-216-097-91 RES-CHIP 100K 5% 1/10W
R104 1-216-089-91 RES-CHIP 47K 5% 1/10W
R105 1-216-081-00 METAL CHIP 22K 5% 1/10W
R204 1-216-009-91 RES-CHIP 22 5% 1/10W
R205 1-216-041-00 METAL CHIP 470 5% 1/10W
• SEMICONDUCTORS
In each case, u: µ, for example:
uA...: µA... , uPA... , µPA... ,
uPB... , µPB... , uPC... , µPC... ,
uPD..., µPD...
The components identified by mark 0 or
dotted line with mark 0 are critical for safety.
Replace only with part number specified.
Les composants identifiés par une marque
0 sont critiques pour la sécurité.
Ne les remplacer que par une pièce portant
le numéro spécifié.
< TRIMMER >
< VARIABLE CAPACITOR >
< DIODE >
< IC >
< JUMPER >
< COIL >
< LED >
< TRANSISTOR >
< RESISTOR >
— 11 —
— 12 —
Ref. No. Part No. Description Remarks
< VARIABLE RESISTOR >
RV1 1-228-790-00 RES, VAR, CARBON 50K (VOLUME)
< SWITCH >
S1 1-692-181-21 SWITCH, SLIDE (FM/AM)
S2 1-762-232-11 SWITCH, SLIDE
(OFF/RADIO ON/RADIO/BUZZER)
S3 1-554-303-21 SWITCH, TACTILE (TIME SET M)
S4 1-554-303-21 SWITCH, TACTILE (TIME SET H)
S5 1-554-303-21 SWITCH, TACTILE (ALARM)
S6 1-554-303-21 SWITCH, TACTILE (CLOCK)
S7 1-554-303-21 SWITCH, TACTILE (SLEEP)
S8 1-554-303-21 SWITCH, TACTILE (SNOOZE/SLEEP OFF)
< TRANSFORMER >
T1 1-404-790-11 TRANSFORMER, IF
< FLAT CABLE >
* W701 1-776-983-11 CORD, CONNECTION
* W702 1-769-137-11 CORD, CONNECTION (16 CORE)
**************************************************************
RADIO
MISCELLANEOUS
**************
014 1-783-817-11 CORD, POWER
SP1 1-504-748-21 SPEAKER (6.6CM)
0T101 1-435-201-11 TRANSFORMER, POWER
**************************************************************
ACCESSORIES & PACKING MATERIALS
*******************************
3-867-923-11 MANUAL, INSTRUCTION
(ENGLISH/FRENCH)(CND)
3-867-923-21 MANUAL, INSTRUCTION (ENGLISH)(US)
The components identified by
mark 0 or dotted line with mark
0 are critical for safety.
Replace only with part number
specified.
Les composants identifiés par
une marque 0 sont critiques
pour la sécurité.
Ne les remplacer que par une
pièce portant le numéro spécifié.
— 13 —
ICF-C135
9-927-609-11
Sony Corporation
Personal Audio Division Company
— 14 —
Printed in Japan ©1999.10
99J1620-1
Published by General Engineering Dept.
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