Sony Dream Machine ICF-C160 User manual

MICROFILM
ICF-C160
FM/AM CLOCK RADIO
SPECIFICATIONS FEATURES
SERVICE MANUAL
US Model
Canadian Model
AEP Model
E Model
Australian Model
Frequency range
FM: 87.5–108 MHz
AM: 526.5–1606.5kHz (Italian)
530–1605 kHz (EXCEPT Italian)
Speaker
Approx. 6.6 cm (25/8inches) dia. 8 ohms
Power output
120 mW (at 10% harmonic distortion)
Power requirements
120 V AC, 60 Hz
For power backup: 9 V DC, one 6F22 battery
Battery life
Approx. 35 hours using the Sony S-006 P (U)
battery
Dimensions
Approx. 120 124 132 mm (w/h/d)
(43/4×5 ×51/4inches) incl. projecting parts
and controls
Mass
Approx. 660 g (1 Ib 7.2 oz) not incl. battery
Design and specifications are subject to change
without notice.
• Dual alarm
• Date display
• Full power backup function to keep the clock, the
alarm (radio and buzzer) and the radio operation
during a power interruption with a 6F22 battery
(not supplied) installed.

– 2 –
Mark 1 Mark 2 Center
frequency
red — 10.70MHz
blue — 10.67MHz
orange — 10.73MHz
black — 10.64MHz
white — 10.76MHz
white white 10.75 MHz
yellow — 10.79 MHz
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.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE !
SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE
DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ
DE FONCTIONNEMENT. NE REMPLACER CES COM-
POSANTS QUE PAR DES PIÈCES SONY DONT LES
NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
SAFETY CHECK-OUT
After correcting the original service problem, perform the fol-
lowing 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
TheAC 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-operatedAC 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 voltmeter. The “limit” indica-
tion is 0.75 V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-
amples 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)
CF1
mark 2
CF3
mark 2
mark 1
Fig. A. Using an AC voltmeter to check AC leakage.
1.5 k Ω 0.15 µ FAC
voltmete
r
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK !OR DOTTED
LINE WITH MARK !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.
Note on chip component replacement
•Never reuse a disconnected chip component.
•Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
CORD DRESSING
(POWER, ANTENNA)
1) Connect the power cord and antenna cord as shown in the
figure.
2) Mount the cord stopper with screws (P3 ×10).
Note:Tighten completely the screws (P3 ×10).
SECTION 1
SERVICING NOTE
chassis
antenna cord
power cord
screw
(P3 × 10)
cord stopper

– 3 –
SECTION 2
GENERAL This section is extracted from
instruction manual.

– 4 –
FRONT PANEL ASS’Y
Note: Follow the disassembly procedure in the numerical order given.
SECTION 3
DISASSEMBLY
4 three claws
2 screw
(P3 × 10)
3 cabinet (upper)
1 four screws
(P3 × 35)
4 three claws
1 battery case lid
2 three claws
3 cover
4 battery snap
5 speaker cord
6 cord (4 core)
7 two claws
8 radio board
9 chassis
MAIN BOARD, CHASSIS
5 front panel ass’y
cover

– 5 –
Note: Follow the assembly procedure in the numerical order given.
Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
( ): Italian model
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L4 CT4
86.5 MHz (87.35 MHz) 109.5 Hz (108.25 MHz)
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 (516.5 kHz) 1,650 kHz (1631.5 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
Clock Frequency Check
Confirm that the reading on the frequency counter is 4800 ± 400 Hz.
If frequency is higher, change capacitor value of C27.
If frequency is lower, change resistor value of R8.
• Adjusting Location: RADIO board (Component Side)
T1: AM IF
ADJUSTMENT CT1: AM TRACKING
ADJUSTMENT
CT4: FM FREQUENCY
COVERAGE
ADJUSTMENT
L2: AM FREQUENCY
COVERAGE
ADJUSTMENT
L1: AM TRACKING
ADJUSTMENT CT3: FM TRACKING ADJUSTMENT
L4: FM FREQUENCY
COVERAGE
ADJUSTMENT
CT2: AM FREQUENCY
COVERAGE
ADJUSTMENT
SECTION 4
DIAL POINTER SETTING SECTION 5 ELECTRICAL ADJUSTMENTS
3 Install the knob (TUNE) with
board shape position as shown
in Figure.
4 Install the knob (VOL)
with making position as
shown in Figure.
5 Turn CV1 and RV1 shaft in
the arrow direction fully.
6 radio board
board shape
pointer
claw
A
knob (tune)
CV1
RV1
1 pointer
main board
(Component side)
– 6 –
2 Set the pointer part A
portion to claw of chassis.
[FM]
Setting:
BAND switch: FM
[AM]
Setting:
BAND switch: AM
IC1
+
–
0.01 µF
+
–
AM RF SSG
30% amplitude
modulation by
400 Hz signal
Outlet level: as low as possible
set
speaker terminal
level meter
Put the lead-wire
antenna close to
the set.
± 22.5 kHz frequency
deviation by 400 Hz
signal
FM RF SSG
set
speaker terminal
level meter
FM lead wire antenna terminal
+
–
frequency counter
IC2 pin !ª
10 pF

– 12 –
•IC Block Diagram
IC1 CXA1019S
12 3 45 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

– 13 –
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)
↑↑
Parts Color Cabinet's Color
SECTION 7
EXPLODED VIEWS
• Abbreviation
CND : Canadian IT : Italian
SP : Singapore AUS: Australian
(1) CABINET (UPPER) SECTION
3
4
5
6
not supplied
7
8
9
10
#1
1
2
#2
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
1 X-3373-826-1 PANEL ASSY, FRONT (BLACK)
1 X-3373-827-1 PANEL ASSY, FRONT (WHITE)
1 X-3373-828-1 PANEL ASSY, FRONT (SILVER)
2 3-011-578-01 SCALE, DIAL (US, CND, E)
2 3-011-578-11 SCALE, DIAL (AEP, SP, AUS)
2 3-011-578-41 SCALE, DIAL (IT)
3 3-011-569-01 BUTTON (BLACK)
3 3-011-569-11 BUTTON (WHITE)
3 3-011-569-21 BUTTON (SILVER)
4 3-011-566-01 CABINET (UPPER) (BLACK) (US, CND, E)
4 3-011-566-11 CABINET (UPPER) (WHITE) (US, CND, E)
4 3-011-566-21 CABINET (UPPER) (SILVER) (US, CND, E)
4 3-011-566-31 CABINET (UPPER) (BLACK) (AEP, IT, SP, AUS)
4 3-011-566-41 CABINET (UPPER) (WHITE) (AEP, IT, SP, AUS)
4 3-011-566-51 CABINET (UPPER) (SILVER) (AEP, IT, SP, AUS)
5 3-011-572-01 BUTTON (SNOOZE)
(SNOOZE/DATE/SLEEP OFF) (BLACK)
5 3-011-572-11 BUTTON (SNOOZE)
(SNOOZE/DATE/SLEEP OFF) (WHITE)
5 3-011-572-21 BUTTON (SNOOZE)
(SNOOZE/DATE/SLEEP OFF) (SILVER)
*6 A-3679-888-A RADIO BOARD, COMPLETE (US, CND, E)
*6 A-3679-889-A RADIO BOARD, COMPLETE (AEP, SP)
*6 A-3679-901-A RADIO BOARD, COMPLETE (IT)
*6 A-3679-902-A RADIO BOARD, COMPLETE (AUS)
7 3-013-863-01 KNOB (TUNE)
*8 3-011-574-01 CHASSIS
9 3-011-575-01 POINTER
10 3-919-268-01 KNOB (VOL)
The components identified by mark
!or dotted line with mark !are
critical for safety.
Replace only with part number
specified.
Les composants identifiés par une
marque !sont critiquens pour la
sécurité.
Ne les remplacer que par une pièce
portant le neméro spécifié.
•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 num-
ber 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.
#4

– 14 –
(2) CABINET (LOWER) SECTION
51
52
53
54
55
56
57
57
57
57
US, CND AEP, IT, SP
EAUS
not supplied
#1
#3
SP1
T2
The components identified by mark
!or dotted line with mark !are
critical for safety.
Replace only with part number
specified.
Les composants identifiés par une
marque !sont critiquens pour la
sécurité.
Ne les remplacer que par une pièce
portant le neméro spécifié.
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
51 3-011-567-01 CABINET (LOWER) (BLACK)
51 3-011-567-11 CABINET (LOWER) (WHITE)
51 3-011-567-21 CABINET (LOWER) (SILVER)
52 3-016-158-01 CUSHION
*53 3-011-576-01 COVER (BLACK)
*53 3-011-576-11 COVER (WHITE)
*53 3-011-576-21 COVER (SILVER)
*54 3-884-408-00 STOPPER, CORD
55 3-369-135-21 LID, BATTERY CASE
56 3-368-852-01 FOOT
!57 1-551-958-21 CORD, POWER (AEP, IT, SP)
!57 1-765-458-11 CORD, POWER (AUS)
!57 1-769-339-11 CORD, POWER (US, CND)
!57 1-769-339-21 CORD, POWER (E)
SP1 1-504-748-21 SPEAKER (6.6CM)
!T2 1-429-460-11 TRANSFORMER, POWER (US, CND, E)
!T2 1-429-461-11 TRANSFORMER, POWER (AEP, IT, SP, AUS)