Read Sony ICF-CD815 Service Manual online
ICF-CD815
22
22
ICF-CD815
•
Waveforms
– MAIN Board –
2
IC801
ta
(MXO)
(Radio on mode)
1 V/DIV, 5
µ
s/DIV
13.3
µ
s
3 Vp-p
4
IC701
qg
(FEO)
(CD play mode)
20 mV/DIV, 500 ns/DIV
Approx.
30 mVp-p
30 mVp-p
5
IC701
ql
(RFGO)
(CD play mode)
500 mV/DIV, 500 ns/DIV
1.2 Vp-p
3
IC701
qa
(TEO)
(CD play mode)
200 mV/DIV, 500 ns/DIV
Approx.
250 mVp-p
250 mVp-p
1
IC801
ra
(XO)
(CD play mode)
1 V/DIV, 20
n
s/DIV
59.1 ns
2.7 Vp-p
•
IC Block Diagrams
– TUNER Board –
IC1
TA2132BP
– MAIN Board –
IC301
UTC8227 S
FM RF IN
1
RF GND
2
MIX OUT
3
AGC
4
VCC
5
FM IF IN
6
16
AM RF IN
15
FM RF OUT
FM
RF
14
AM/FM SW
11
AFC
10
DET OUT
9
QUAD
13
FM OSC
AM
RF
FM
MIX
FM
OSC
12
AM OSC
AM
OSC
FM/AM
AM
MIX
AGC
FM
IF
AM IF IN
7
GND
8
AM
IF
AM
DET
FM
DET
AF
BUFFER
1
7
8
9
10
11
12
3
4
+
–
+
–
VCC1
CH-1
CH-2
OUTPUT1
BOOT STRAP1
PRE GND
NF1
INPUT1
VCC2
OUTPUT2
BOOT STRAP2
RIPPLE
NF2
INPUT2
2
5
6
IC751 BA5826FP-E2
1
2
3
4
5
6
7
8
9
10
11
12
13
13
14
28
27
26
24
23
22
21
20
19
18
17
16
15
25
LEVEL
SHIFT
LEVEL
SHIFT
THERMAL
SHUT-DOWN
REGULATOR
BIAS TRAP
LEVEL
SHIFT
MUTE
LEVEL
SHIFT
D.BUFF
D.BUFF
D.BUFF
GND
IN4
IN4'
BIAS
VCC
VCC
IN3'
IN3
VO3(+)
VO3(–)
VO4(–)
VO4(+)
RESETt
OPIN
VO1(–)
REGB
VO1(+)
IN1
RESET
REGOUT
MUTE
GND
IN2'
IN2
VO2(+)
VO2(–)
GND
OPOUT
D.BUFF
D.BUFF
D.BUFF
D.BUFF
D.BUFF
REGULATOR
VCC
VCC
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