Sony ICF-C111 Service Manual ▷ View online
8
ICF-C111
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L4
CT4
86.5 MHz
109.5 MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
CT3
86.5 MHz
109.5 MHz
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
455 kHz
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
FM SECTION 0 dB = 1 µV
Setting:
BAND switch: FM
VOLUME switch: MIN
BAND switch: FM
VOLUME switch: MIN
AM SECTION
Setting:
BAND switch: AM
VOLUME switch: MIN
BAND switch: AM
VOLUME switch: MIN
SECTION 4
ELECTRICAL ADJUSTMENTS
FM lead wire
antenna terminal
antenna terminal
0.01
µ
F
FM RF signal
generator
generator
400Hz, 30% FM modulation
frequency deviation
frequency deviation
±
22.5kHz
Output level: as low as possible
set
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
AM RF signal
generator
generator
400Hz, 30%
AM modulation
Output level: as low as possible
AM modulation
Output level: as low as possible
• Connecting Level Meter (FM and AM)
Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally done
by the trimmer capacitors.
frequency coverage and tracking adjustments should be finally done
by the trimmer capacitors.
speaker terminal
set
16
Ω
level meter
(range: 0.5–5 V ac)
(range: 0.5–5 V ac)
Adjustment Location: See page 9.
9
ICF-C111
Adjustment Location:
S1
BAND
FM
AM
CN701
SP1
(SPEAKER)
SP1
1
6
CT3
CT1
CT2
CT4
CV1
TUNING
L3
L1
L4
T1
L2
VR1
CT2, L2
AM
FREQUENCY
COVERAGE
ADJUSTMENT
CT4, L4
FM
FREQUENCY
COVERAGE
ADJUSTMENT
FM
LEAD WIRE
ANTENNA
CT1, L1
AM
TRACKING
ADJUSTMENT
CT3, L3
FM
TRACKING
ADJUSTMENT
T1
AM
IF
ADJUSTMENT
– MAIN board (component side) –
10
ICF-C111
SECTION 5
DIAGRAMS
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
BOARDS AND SCHEMATIC DIAGRAMS.
Common Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
f
: internal component.
•
C
: panel designation.
•
A
: B+ Line.
•
H
: adjustment for repair.
• Total current is measured.
• Power voltage is dc 9V and fed with regulated dc power
• Power voltage is dc 9V and fed with regulated dc power
supply from battery terminal.
• Voltage is dc with respect to ground under no-signal
(detuned) condition.
no mark : FM
(
no mark : FM
(
) : AM
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Signal path.
F
: FM
f
: AM
•
Abbreviation
AR
AR
: Argentina model.
E13
: AC 220 – 230 V area in E model.
E92
: AC 120 V area in E model.
MX
: Mexican model.
SP
: Singapore model.
Note: The components identified by mark
0
or dotted line
with mark
0
are critical for safety.
Replace only with part number specified.
Common Note on Printed Wiring Boards:
• X
: parts extracted from the component side.
• Y
: parts extracted from the conductor side.
•
f
: internal component.
•
: Pattern from the side which enables seeing.
•
Abbreviation
AR
AR
: Argentina model.
E13
: AC 220 – 230 V area in E model.
E92
: AC 120 V area in E model.
MX
: Mexican model.
SP
: Singapore model.
ICF-C111
11
11
5-1. BLOCK DIAGRAM
28
16
9
1
|
13
23
21
22
24
27
AF POWER
AMP
FM IF
AM IF
FM
DISCRIMINATOR
5
17
18
RIPPLE
FILTER
INPUT
CONTROL
ALARM TIME CTR
OUTPUT
CONTROL
DISPLAY
CONTROL
LED101
CLOCK DISPLAY
DISPLAY
DECODER/
DRIVER
OSC
1/25 or 1/30
Q201
SWITCH
Q202
16
18
19
S7
SLEEP
S3
TIME SET
M
S4
SLEEP
INPUT
ALARM
DISP
MIN SET
HOUR SET
SNOOZE INPUT
TIME SET
H
S7
SNOOZE/SLEEP OFF
S2
(Function Selector)
+B
BUZZER
ALARM
ALARM
RADIO
RADIO ON
OFF
S6
CLOCK
S5
ALARM
D203
AR, E13, SP MODEL
DRY BATTERY
"S-006P" 9V
(IEC DESIGNATION 6F22)
AC IN ~
LED102
+B
W703
1-13
14-16
L3
CV1-3 CT3
CV1-4 CT4
CV1-1 CT1
CV1-2 CT2
CT3,L3
FM
TRACKING
L4
L1
L2
CT4,L4
FM
FREQUENCY
COVERAGE
CT2,L2
AM
FREQUENCY
COVERAGE
CT1,L1
AM
TRACKING
AM
FERRITE-ROD
ANTENNA
CV1
TUNING
T1
AM IF
FM FRONT
-END
AM FRONT
-END
IC1
FM/AM
FRONT-END
IF AMP,DET
FM ANT
FM RF
FM OSC
AM ANT
AM OSC
VREG
13
10
15
8
11
6
MIX OUT
CF3
CF2
T1
FM
IF IN
IF IN
AF IN
AF OUT
NF
+B
+B
+B
+B
+B
+B
DET OUT
AM
IF IN
IF IN
DISCRI
VOL
CF1
10.7MHz
VREG
Q1
VR1
w
VOLUME
IC101
ALARM CLOCK
S1
BAND
FM
AM
BAND SW
CN701
(1/2)
CN701
(2/2)
1
2
SP1
(SPEAKER)
KEEP THE CORRECT
TIME DURING POWER
STOPPAGE
REG
FM
LEAD WIRE
ANTENNA
SLEEP
OUT
ALARM
OUT
ALARM OFF
S2-1
S2-2
D201
T2
D202
D204
D205
MAIN BOARD
TRANSFORMER
BOARD
BOARD
3
• Signal path
: FM
: AM
• Abbreviation
AR : Argentina model
E13 : AC220-230V area in E model
E92 : AC120V area in E model
MX : Mexican model
SP : Singapore model
AR : Argentina model
E13 : AC220-230V area in E model
E92 : AC120V area in E model
MX : Mexican model
SP : Singapore model
4
24
25
17
4
3
5
6
D101
E92, MX MODEL
PS101
AR, E13, SP
MODEL
MODEL
E92, MX MODEL
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