Kenwood HM-901 Service Manual page 11

U V
L63 10uH
C68 2P
OSC
L62
3.7V
C61
0.01
R2
220
2.1V
10.6V
C5 C6 CF2
0.01 0.01
10.6V
Q2
2.1V
1.4V
1.4V
Q1
CF1 Q1,2
FM IF
AMP
C69
0.01
12.1V
RF ATT
0V
12.3V
Q3
R17
620
R20
1.2K
12.3V
W X
DISCRI
CN2
1 2
3.1V
Q31
2.6V
+
+
1.8V(1.5V) 3.6V
0V(1.1V)
2.8V(3.9V)
4.1V(1.3V)
R35
3.6V
33K
L31
L33
+ +
C37
1
L32
AM IFT
R59
2.2K
+
8.3V
R31 DISCRIMINATOR
82 1W
VT
C82
1.0V
27P
2.5V
IC2
PLL
IC
REFERENCE PHASE DETECTOR
DIVIDER CHARGE PUMP
POWER
UNLOCK
ON
DETECTOR
RESET
2
C B I / F DATA SHIFT REGISTER LATCH
2.5V
C81
22P
C92 470P
0V(9.7V)
Y Z
L34
12.3V
BUFFER B.P.F
C50
1000P
R41
2.2K
R42
47K
C53 0.027
C54 0.027
C56 R46 L36
2.2u35 1.2K
+ +
+
+
C55 R45
2.9V
2.2u35 1.2K
+
3.6V
IC1
L35
FM/AM/
MPX
SYSTEM
IC
1.7V 7.3V
FM/AM
SW
6.8V(0V)
Q32
R49
47K
+
+ + +
0V(0.6V)
C95
47P
R90
5.6K
1/4W
0V
2.5V(0V) 0V(2.5V)
0V
1/2
SWALLOW COUNTER 12bits PROGRAMABLE
1/16,1/17 4bits
DIVIDER
12.1V(0V)
UNIVERSAL COUNTER
12.3V
AA AB
DET-OUT
IC3(1/2)
8
5
2.9V
+ 7
6
–
R54 7.0V
2.9V
4 68K
BUFFER
IC3(2/2)
R50
10K 3 R51 R53
D33
+
1 1K 1K
2
–
4.3V
R47 R48
3.9K 3.9K
12.3V
R89
100
1/4W
L81
R94
560 1uH
0V
-12.7V
MUTE
ON:0.6V
OFF:-2.2V
Q101
FM
R104 47K
Q81
MUTE
CONTROL
R93
1.2K
Q103
Q102 R101
1K
0V
D101
3.6V
MUTE ON:0V
11.5V(12.0V)
MUTE OFF:4.8V
Y05-3471-21
AC AD
CN1
15 DET-OUT
14 S-LEVEL
13 SD
X09-A/4
12 STEREO
-E1
11 Rch
2/3
10 GND
9 Lch
A
8 +12V
7 -12V
6 T.MUTE
( 4 ) 5 PLL-DATA
( )
5 4 PLL-CLK
( )
3 3 PLL-CE
( 6 ) 2 PLL-DO
1 NC
R-SE9(1/3)
R-SE9