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GRUNDIG Service
LA1833N
BAND-W
24
23
22
ALC
AM
AM
OSC
MIX
BUFF
LEVEL
DET
S-CURVE
FM
IF
FM
DET
REG
1
2
3
BU1924F
100kΩ
(4)
MUX
120kΩ
100kΩ
anti-aliasing
filter
(3)
Vref
(5)
V
DD1
∗1
Analog
Power supply
(6)
V
SS1
PLL
57kH
Z
(12)
RDS/ARI
V
DD2
∗1
Digital
∗2
Power supply
(11)
V
SS2
Reference
clock
1 (
) 3
1 (
) 4
XO
XI
TC9257F
21
20
19
AM
RF. AMP
AGC
AM
AM
DET
IF
AM / FM
IF
COMP
BUFF
TUNING
DRIVE
GND
4
5
6
8th Switched
capacitor filter
Bi-phase
PLL
decoder
1187.5Hz
18
17
16
DECODER
ANTI-BIRDIE
P-DET
STEREO
Ø
SW
VCO
FF
304kHz
38k
V CC
7
8
9
V
SS3
CMP
(7)
(8)
comparator
(16)
RCLK
(1)
QUAL
(2)
Differential
RDATA
decoder
Measurement
circuit
1 (
) 0
(9)
T2
T1
3 -
OVATION CDS 6580 SPCD
15
14
13
PILOT
CANCEL
FF
FF
PILOT
π
19k∠
19k∠0
DET
2
10
11
12
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