HCD-EP505
21
21
6-7.
SCHEMATIC DIAGRAM – MAIN Section (AEP, UK, CH models) (1/3) –
•
See page 19 for Waveform.
•
See page 32 for IC Block Diagrams.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
[
] : AM
(
) : CD PLAY
<
> : TAPE PLAY
1
DISPLAY
BOARD
A
DISPLAY
BOARD
B
MAIN
BOARD
(3/3)
3
MAIN
BOARD
(2/3)
4
MAIN
BOARD
(3/3)
5
MAIN
BOARD
(3/3)
6
MAIN
BOARD
(2/3)
1
MAIN
BOARD
(2/3)
2
IC B/D
IC B/D
IC B/D
3.7 (0)
<0>
0 (3.7)
<0>
4.3
4.3
4.3
4.3
3.2
3.2
2.9
3.7
3.6
3.6
3.6
0
8
0
3.7(0)
<0>
4
4
4
4
4
4
4
4
0 (0)
<3.7>
0 (3.7)
<0>
4.8
3.6
3.6
5.7
5.7
1.2
0.1
0
0
[1.9]
6.6[0]
1.4
2.6
7.6
4.8 (0)<0>
4.1 (0)<0>
0.7
7.7
[8]
3.5
[0]
12.4[0]
12.5[0.1]
11.7
[0]
0[0.7]
FM: 0, AM: 0.7
12.4
9[0]
2.7[0]
0[0.6]
0[3.5]
2 [0]
2.2
[2]
0 [2]
4.1
0
0
0.9
0.9
2
4.1
4.8
0
0
2
fmin-fmax
FM:1.7
−
8.4
AM:1.2
−
7.1
0
4
4
4
4
4
4
4
4
4
0 (0)
<3.7>
0
0
0
0
0
0
0
0
T401,TC401
AM TRACKING
T406
AM IF
T402
AM FREQUENCY
COVERAGE
0
[0.7]
0
[0.7]
3.2
[3.5]
3.2
[3.5]
7.7
[8]
7.7
[8]
6.6
[3.7]
6.6
[6.9]
0
CN305
11P
CN303
11P
133
133
133
50V
Q501, 502
MUTING
DTC343
DTC343
0.47U
50V
0.47U
50V
4.7U
50V
4.7U
50V
2.2U
50V
2.2U
50V
2.2U
50V
2.2U
50V
4.7U
50V
4.7U
50V
Q503, 504
MEGA BASS
CONTROL
4700P
5600P
50V
50V
4.7k
4700P
5700P
2.7k
2.7k
CN101
9P
16V
Q401, 402
B+ SWITCH
FM IF AMP
1
5
4
2
3
50V
50V
50V
50V
50V
50V
16V
B+ SWITCH
BUFFER
2.7k
2.7k
50V
50V
50V
50V
50V
16V
50V
50V
Q404
FM/AM
BAND SELECT SWITCH
50V
5
4
3
2
1
AM RF
1
2
3
4
6
5
TP
(AM VT)
TP
(FM VT)
TP
(FM ANT)
MAIN BOARD
(1/3)
CN402
AM ANT
CN401
FM ANT
75
Ω
COAXIAL
SUPPLIED
WITH THE
ASSEMBLED
BLOCK
CD
BLOCK
U402
FM/AM IF AMP,
AM RF AMP/MIX/OSC,
FM/AM DET, DET, MPX
U501
INPUT SELECT
SWITCH,
ELECTRICAL
VOLUME
U403
FM/AM PLL
50V
(AEP, UK)
50V
Ver 1.1
(Page 22)
(Page 22)
(Page 23)
(Page 22)
(Page
23)
(Page 23)
(Page 29)
(Page 29)
Summary of Contents for HCD-EP505
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