Sony ICF-C215 Service Manual page 13

ICF-C215/C215L
Q Q
3 7 6 3 1 5 1 5 0
Waveforms (7CET model only)
z
1
5.5 Vp-p
51.2 KHz
IC3 q; OUT1
VOLT/DIV : 2 V AC
TIME/DIV : 5 µsec
2
13.7 Vp-p
50 Hz
Q9 C
VOLT/DIV : 5 V AC
TIME/DIV : 5 msec
Note on Schematic Diagram: EXCEPT 7CET model
Note:
• 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 / W or less unless otherwise
4
specified.
• : internal component.
f
T E
L 1 3 9 4 2 2 9 6 5 1 3
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.
• Voltages and waveforms are dc with respect to ground in
playback mode.
no mark : FM
( ) : MW/LW
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
F
: FM
• Abbreviation
AR : Argentina
IT : Italian
CET : East European & RUSSIAN
7CET model is ICF-C215 with crystal board
w w w
– 17 –
Note on Schematic Diagram: 7CET model only
Note:
• 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
/ W or less unless otherwise
4
specified.
• : internal component.
f
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.
• Voltages and waveforms are dc with respect to ground in
playback mode.
no mark : FM
( ) : AM
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F : FM
• Abbreviation
7CET model is ICF-C215 with crystal board
x a o
y
. i
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8
z IC Block Diagrams
IC1 CXA1019S
30 29 28 27 26 25 24
AM IF DET AGC
AF POWER AMP
DISCRIMINATOR
1 2 3 4 5 6 7
IC2 LM8560N
28 27 26 25 24 23
50/60Hz
OSC
D
Q Q
3 7 6 3
CTR
GATE 1/25 OR 1/30
STAND
50/60Hz
BY DET
1kHz
50/60Hz
1/2
BLANK
PF.
& SEC
DET
FLASH CTR
GATE
T.DISP &
S.SAMPLE
SEC
TIME
OUTPUT
DECODER/
DRIVER
ALARM
SLEEP
1 – 13
u 1 6 3
.
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2 4
9 9 8
23 22 21 20 19 18 17 16
TUNING
METER
AM FE
FM IF
FM
FM FE
8 9 10 11 14 15
12 13
22 21 20 19 18 17 16 15
50/60Hz 50/60Hz 50/60Hz 50/60Hz 50/60Hz
D D D D D
1 5 1 5 0 8 9 2 4
OUTPUT
CONTROL
CONTROL
2Hz
PWR
UP S.SAMPLE
INPUT
CONTROL
PWR
F.SAMPLE TONE
UP
2Hz
PWR UP
SLEEP
CTR
SEC RSTYHLD
RESET
ALARM & ALARM &
CONTROL
T.RST
S.SAMPLE F.SAMPLE
AL.RST
ALARM ALARM
MIN CTR HR CTR
SEC DISP
COMPARATOR
T.DISP
DISPLAY
CONTROL
AL.DISP
TIME TIME
SL.DISP MIN CTR HR CTR
TIME & TIME &
S.SAMPLE F.SAMPLE
14
m
c o
– 18 –
2
9 9
9 8 2 9 9