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HCD-EP50LIV
Q Q
3 7 6 3 1 5 1 5 0
6-7.
SCHEMATIC DIAGRAM – MAIN Board (1/3) – •
MAIN BOARD
(1/3)
TP
(AM VT)
CN12
AM ANT
CN13
FM ANT
75Ω
COAXIAL
1SS133T
R239
3.3M
1/2W
1SS133T
0.001
RF INPUT
i
TP
GND
i
(FM VT)
0.047
GND
i
11.3
12.5
(0)
G
GND
i
12 (0.1)
INCLUDED IN
VT
i
MAIN BOARD
VCC
i
(Page 19)
Q4, 10
B+ SWITCH
IF OUTPUT
i
T E
L
1 3 9 4 2 2 9 6 5 1 3
12.2 (0.1)
0.1 (0.7)
OSCO
i
1
CLOCK
i
MAIN BOARD
i
DA_IN
(2/3)
(Page 21)
RR-CH
i
RL-CH
i
2
MAIN BOARD
(2/3)
TR-CH
i
(Page 21)
TL-CH
i
CN3
9P
* CD
DA
BLOCK
CLK
* SUPPLIED AS THE
ASSEMBLED BLOCK
NC
RESET
0.001
0.001
w w w
•
See page 28 for Waveform.
See page 28 for IC Block Diagrams.
T8
AM FREQUENCY
COVERRAGE
T6, TC1
0.047
AM TRACKING
AM RF
0.001
U1
FM/AM IF AMP,
AM RF AMP/MIX/OSC,
FM/AM DET, MPX
0.047
0.001
0.0056
50V
0.1
0.1
0.1
0.1
0.1
0.1
50V
1SS133T
0.1
U6
INPUT SELECT SWITCH,
ELECTRICAL VOLUME
IC B/D
x
a o
.
i
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Q3
FM/AM BAND
SELECT SWITCH
50V
L. P. F.
L. P. F.
0.0047
0.0047
50V
0.047
50V
50V
6.7 (0.1)
0.1
(0.7)
3.6
U1
LA1837
IC B/D
0.047
Q
Q
3
7
6
AM IF
50V
50V
5
8.1
50V
VCC
4.5
4.5
50V
4.4
4.4
GND
0.033
50V
u 1 6 3
y
20
20
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2
4
8
9
9
Q17
STEREO/MONO
SWITCHING
6.7
0
0
0
IFIN
IO1
0.001
IO2
BO4
0.001
0 (2.3)
AMIN
BO3
2.3 (0)
FMIN
BO2
4.9
0.1 (4)
VDD
BO1
0.9
4.9
PD
DO
0.9
4.9
AIN
CL
1.3
0
AOUT
DI
3
1
5
1
5
0
8
9
0
VSS
CE
2.4
2.3
U2
XOUT
XIN
1
0.1
FM/AM PLL
IC B/D
Q13, 16
MEGA BASS CONTROL SWITCH
0
0
0
0
U3
LINE AMP
0.022
4.5
50V
0
0
0
0
4.4
Q6, 7
MUTING
50V
m
c o
.
2
8
9
9
4.9
4.9
4.1
0.1
0.7
Q1, 11
B+ SWITCH
i
TU-EN
3
i
TIMER
MAIN BOARD
i
STR
(2/3)
(Page 21)
2
4
9
8
2
9
9
CN4
3P
RDS_DA
A
DSIPLAY
BOARD
(Page 25)
CN11
7P
B
DSIPLAY
BOARD
(Page
25)
4
i
POWER-FAIL
MAIN BOARD
i
POWER-LINE
(3/3)
(Page 22)
50V
CN5
11P
C
DSIPLAY
BOARD
RESET
(Page
DA
25)
CLK
(Page 21)
5
i
REC. LED+
i
BEAT
MAIN BOARD
(2/3)
i
R-CH
6
i
MUTE-LINE
MAIN BOARD
i
L-CH
(3/3)
(Page 22)
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