Werbung
GRUNDIG Service
Tuner
IC03 (BU1924F)
(4)
100kΩ
120kΩ
100kΩ
anti-aliasing
filter
(3)
(5)
Analog
Power supply
(6)
PLL
PLL
57kH
Z
1187.5Hz
(12)
RDS/ARI
Digital
Power supply
(11)
Reference
clock
(13)
(14)
IC01 (LA1837)
30
29
28
27
26
25
REG
AM
AM
ALC
AM
RF.AMP
MIX
OSC
BUFF
AGC
AM IF
DET
SD
COMP
AM
S-METER
FM
AM/FM
S-CURVE
S-METER
IF-BUFF
TUNING
DRIVE
FM
AM IF
DET
GND
1
2
3
4
5
6
(7)
(8)
V
SS3
8th Switched
capacitor filter
comparator
(16)
(1)
(2)
Bi-phase
Differential
decoder
decoder
Measurement
circuit
(10)
(9)
24
23
22
21
20
19
18
3rd or 5th
DECODER
ANTI-BIRDIE
MUTE
P-DET
STEREO
ø
SW
VCO
FF
FF
FF
π
19k ∠ –
19k ∠ Θ
304kHz
38k
2
STEREO
DRIVE
GND
7
8
9
10
11
12
13
IC02 (LC72131)
XIN
1
XOUT
22
FM IN
16
1/2
AM IN
15
CE
3
DI
4
CCB
I/F
CL
5
DO
6
POWER ON
VDO
17
RESET
VSS
21
17
16
PILOT
DET
14
15
2 - 18
CINIO AVR 5200 DD
REVERENCE
PHASE DETECTOR
DIVIDER
CHARGE PUMP
UNLOCK
SWALLOW COUNTER
DETECTOR
1/16, 1/17 4bits
12 bits PROGRAMMABLE
DIVIDER
DATA SHIFT REGISTER
UNIVERSAL
COUNTER
LATCH
7
8
9
10
11
13
BO1
BO2
BO3
BO4
IO1
IO2
10
PO
19
A IN
20
A OUT
12
12
IF IN
Werbung
