Schematic Diagram - Main Board (1/2) - Sony HCD-EP30 Service Manual

HCD-EP30/EP40
Q Q
3 7 6 3 1 5 1 5 0
6-2.
T E
L 1 3 9 4 2 2 9 6 5 1 3
w w w
SCHEMATIC DIAGRAM – MAIN Board (1/2) – •
L104
MAIN BOARD (1/2)
FM FREQUENCY
COVERAGE
L103, TC101
FM TRACKING
C105 0.001
L103
C104
FM RF
0.001
C157
FM
0.1
LEAD
ANTENNA
0.001
ANT1
1
FM ANT
(0)
75Ω
COAXIAL
AM FERRITE-ROD
+
0.047 ANTENNA
0.047
AM OSC 50V
L110, TC102 T102
AM FREQUENCY
AM TRACKING
COVERAGE
x a o
y
. i
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•
See page 23 for Waveforms. See page 24 for IC Block Diagrams.
TP10
(FM VT)
Q101
R112 IC101
FM OSC BUFFER
3.3k
FM/AM IF AMB
MIX, MPX, DET, OSC
5.4 + IC B/D
(0.1)
0 (0.7)
0.01
C111
10V
0.001
0
2SC1923
0.001
1.2k
6.8k
6.8k
0.0015 0.0015
3.9k
+
0.0033 0.0033
50V
+
3.9k 50V
4.5 (4.3) 4.5 (4.3)
4.5 (4.3)
+ STEREO/MONO
2.2P
0
4.5 (5.6)
SWITCHING
0 (0.7)
+
+
+
10.7MHz
0.3 (0.5)
5.2
(5.4)
+
450kHz
+
0.2
50V (0.4)
470
Q Q 16V
BUFFER
3 7 6
10.7MHz
0.022 0.022
TP11
(AM VT)
u 1 6 3
16 16
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2 4
8 9 9
IC102
FM/AM PLL
IC B/D
50V
+
100p
0.001
Q103
0.022
Q102
1µH
FM/AM BAND
SELECT SWITCH
Q116, 209, 210
TUNER B+ SWITCH
Q109, 605
B+ SWITCH
0.1
3 1 5 1 5 0 8 9 2
5.6
4.7k
5.4
2SD1616-L
2.4
0
4.8
100µH
0.1
+
0.1
IC604
RDS DECODER
IC B/D
EP40
U U U
1 2 3
u u u
1 MAIN BOARD
(2/2)
(Page 17)
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
m
( ) : AM
∗
c o
.
2
8 9 9
5.6k
+
0.1
1
2.6
+
16V
7.2MHz
2.5
9.2
9.3
10V
+
8.5
0
0.7
0
0
5.4
CN101
8P
RDSCL
RDSDA
PLLCE
A
PLLDI
4 9 8 2 9 9
PLLCL
DSIPLAY
STOUT
BOARD
SIG
(Page 21)
CT
+
2.2
16V
50V
+
0
2
2.2
U
4
u
: Impossible to measure