Read Sony ICF-C215 / ICF-C215L Service Manual online
– 17 –
– 18 –
ICF-C215/C215L
z
IC Block Diagrams
IC1 CXA1019S
IC2 LM8560N
GND
GND
FM DISCRI
NF
VOL
AM OSC
AFC
FM OSC
REG OUT
FM RF
AM RF IN
N. C
FM RF IN
FE GND
MIX OUT
21
22
23
24
25
26
27
28
29
30
2
3
5
4
6
7
8
9
10
1
11
12
13
14
15
16
17
18
19
20
AF POWER AMP
AM IF DET AGC
AM FE
FM
DISCRIMINATOR
FM FE
TUNING
METER
FM IF
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
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
INPUT
SLEEP
INPUT
HOUR
SET
MIN
SET
VSS
ALARM
OFF
SLEEP
OFF
ALARM
OUTPUT
SLLEP
INPUT
19
ALARM
DISPLA
Y
COL ON
OUT
SEGMENT
OUTPUT
PF.
DET
1kHz
z
Waveforms (7CET model only)
1
IC3
q;
OUT1
2
VOLT/DIV : 2 V AC
TIME/DIV : 5
TIME/DIV : 5
µ
sec
5.5 Vp-p
51.2 KHz
Q9
C
VOLT/DIV : 5 V AC
TIME/DIV : 5 msec
TIME/DIV : 5 msec
13.7 Vp-p
50 Hz
Note on Schematic Diagram: EXCEPT 7CET model
Note:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
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.
Note: The components identified by mark
0
or dotted
line with mark
0
are critical for safety.
Replace only with part number specified.
•
: B+ Line.
•
H
: adjustment for repair.
Voltages are dc with respect to ground under no-signal
(detuned) conditions.
(detuned) conditions.
• Voltages and waveforms are dc with respect to ground in
playback mode.
no mark : FM
(
no mark : FM
(
) : MW/LW
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Signal path.
F
: FM
• Abbreviation
AR
: Argentina
IT
: Italian
CET
: East European & RUSSIAN
7CET model is ICF-C215 with crystal board
Note on Schematic Diagram: 7CET model only
Note:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
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.
Note: The components identified by mark
0
or dotted
line with mark
0
are critical for safety.
Replace only with part number specified.
•
: B+ Line.
•
H
: adjustment for repair.
Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
under no-signal (detuned) conditions.
• Voltages and waveforms are dc with respect to ground in
playback mode.
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.
• Circled numbers refer to waveforms.
• Signal path.
• Signal path.
F
: FM
• Abbreviation
7CET model is ICF-C215 with crystal board
Click on the first or last page to see other ICF-C215 / ICF-C215L service manuals if exist.