Tuner Section - Sony HCD-D290 Service Manual

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– TUNER Section –
IC1 IC21 LC72130
24 23 22 21
PHASE DETECTOR
REFERENCE
DIVIDER
2
C B
I/F
1 2 3 4 5 6
TE
L 13942296513
IC2 IC41 LA1835
30 29 28
ALC
AM AM
OSC MIX
BUFF
S METER
AM/FM
LEVEL
S-CURVE
DET
FM
FM
DET
IF
1 2 3
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20 19 18 17 16
CHARGE PUMP
UNLOCK
POWER
DETECTOR
ON
RESET
SWALLOW COUNTER
1/16, 1/17 4BITS
12BITS PROGRAMMABLE
DRIVER
DATA SHIFT REGISTER LATCH
7 8 9 10
27 26 25 24 23
AM
RF. AMP
AGC
FM AM
IF DET
IF COMP
BUFF
AM/FM
SW
TUNING
DRIVE AM
FM
REG GND
4 5 6 7 8 9
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y
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8
15 14
13
1/2
UNIVERSAL
COUNTER
11 12
Q Q
3 6 7 1 3
20 19 18
22 21
DECODER
ANTI BIRDIE
STEREO
SW
STEREO
DRIVE
TRIG
FF FF FF
VCO
PILOT
DET
PHASE
DET
VCC
10 11 12 13 14
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– 87 –
2 9 9 4 2 8
1 5 0 5 8 2 9 9 4
17 16
MUTE
15
m
co
9 9
2 8 9 9