Sony HCD-EP404 - Schematic Diagram MAIN Section (1;3)

2020
HCD-EP404
6-4. Schematic Diagram MAIN Section (1/3)
• See page 15 for Waveforms. • See page 27,28 for IC Block Diagrams.
2.4
<0.9>
1.3 1.3
3.6 3.6 3.6 3.6 3.6 3.6 3.6 3.6 3.3
0 0
3.6 3.6 3.6 3.6 3.6 3.6 3.6 3.6 3.3
0 0
3.3 3.6
0 <0.1>
0
1.8 <0.1>
3.7 <0.1>
0.9 <0.4> 0.9 <0.4>
2.1 <9>
1.8 <0>
5 <6>
5
<5.6>
0 <0.4>
2.6 <3.3>
5 <5.7>
1.3
4.8 <5.7>
1.3
5 <5.7> 5 <5.8>
1.1 <0.8>
1.3
1.3
1.2
3.3 7.2 4.8
0
0
4.2 <0>
4.3
<3.4>
4.2
<5.2>
0
<0.6>
4.2
<0>
5
<0.1>
2.7
5.4
2
0.1
<0.6>
1
<0>
5 <5.8>
0
<0.2>
0 <4.8>
5.4 4.8
0
0
1.9 <0>
1
8.5
3.8
<0>
4.4
<0.4>
0
0.6
0.6
2.4
0
0
2.4
0
0.022
4.7k
3.3k
0.022
AM FERRITE-ROD
ANTENNA
L104, TC102
AM TRACKING
FM
LEAD ANTENNA
FM
ANT
BPF
1SS133T
1SS133T
0.001
0.1 0.1
0.1 0.1 0.1
0.1
0.1
0.047
3.9k
1SS133T
0.0056
0.022
0.0047 0.033
8.2k
6.8k
6.8k
2.2k 2.2k
0.22
0.22
10k 10k
2SC945
2SC945
0.0047
0.022
8.2k
3.9K
0.047
0.0056
0.1 0.1
0.1
0.1
0.001
0.001
0.001
0.001
0.01 0.01
0.0015 0.0015
0.022
2SC945
0.01
2SC1923
2SC945
0.047
100p
0.001 0.001
0.01
0.1
0.1
2SC3623
1SS133T
8.2k
8.2k
330
DTC343TS
DTC343TS
0.1
0.047
MAIN BOARD
(1/3)
TP
(AM VT)
TP
(FM VT)
CD
BLOCK
SUPPLIED AS
THE ASSEMBLED BLOCK
Q403,404
MUTING
BAND
SWITCH
TO
DISPLAY
BOARD
B
(Page 24)
TO
DISPLAY
BOARD
E
(Page 24)
MAIN
BOARD
(2/3) (3/3)
4
IC102
FM/AM PLL
B+ SWITCH
FM OSC
BUFFER
AMP
IC101
IC B/D
AM/FM IF AMP
MIX,MPX,DET,OSC
MEGA
BASS
MEGA
BASS
IC401
FUNCTION SELECT SWITCH,
ELECTRONIC VOLUME
L103
FM FREQUENCY
COVERAGE
T101
AM FREQUENCY
COVERAGE
L102, TC101
FM TRACKING
IC B/D
IC B/D
MAIN
BOARD
(2/3)
5
MAIN
BOARD
(3/3)
7
MAIN
BOARD
(2/3)
MAIN
BOARD
(2/3)
2
1
12
A
B
C
D
E
F
G
H
I
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