Block Diagram And Schematic Diagram - Pioneer KEH-1900 Service Manual

1
KEH-1900,1950
QQ
3 7 63 1515 0

3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM

3.1 BLOCK DIAGRAM
- KEH-1900/X1M/UC
A
A
TUNER AMP UNIT
B
FM/AM TUNER UNIT
FM RF
CN301
ANT
25
26
Q201 Q202
AMRF/AGC
B
19 20
TE
L 13942296513
C
Q302
LOOP FILTER
www
D
8
1
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2
T31 Q31 CF51
Q3
FM/AM MIX FM/AM IF
41 9 10 14 15
FM/AM PROCESSOR
34
FM
OSC
IC 1 PA4023B
18 23
6 38 32 36 16
CF232 AM IF
AMTV AM
FM+B
OSC
21
15 17
FIX+B
Q806
Q303
FM
EO
Q808
FM SWITCH
x ao
. i
2
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3
CF52 CF53
FM IF FM IF T51
47 1 2
17 19
FM PROCESSOR
IC 2 PA4024A
25 28
31 30 40
AM+B
TUN+B
14
13 6
Q Q
3 6 7
Q804
FIX+B
9V REGULATOR
14
SL
SL
12
FMSD
FMSD
FIX+B
Q805
AM
Q807
AM SWITCH
3 13
u163
y
3
4
2 9 9 4
8
19
7
43
FMSL
9
AMSL
18
1 3 1 5 0 5 8 2 9
B.U
Q802
SYSPW
Q803
ILL+B
SYSTEM CONTROLLER
IC 601 (1/2)
PE5107A
6 54 51 24
25
X601
4.5MHz
m
co
.
4
2 8
9 9
TUN-L
ILL+B
FWD-L
FWD
Lch
REV
Lch
REV-L
HEAD
M
9 4 2 8 9 9
D
MOTOR
C
KEYBO
IL901-903
KEY MATRIX