Block Diagram - Philips MX3550D/37S Service Manual

BLOCK DIAGRAM

TUNER BOARD
AGC
3
1
ANT
VCC
4 6
FM TUNER +12V
RDS IC
BU1923F
MUX 4 LPF
capacitor filter
5
+5V VDD1
12
+5V
VDD2
6
VSS
REFERENCE
CLOCK
DIFFERENTIAL
13
4.332
14
6-2
FM FRONTEND
MIXER
7
IF OUT
VT
5 8 OSC OUT
8th Switched
PLL 57KHz
RDS/ARI
PLL
16
RCLK
1187 5KHz
BI-PHASE
1
QUAL
DECODER
4.5MHz
DECODER
VDD
2
RDATA
9
FM IF
1
FM DET
S-CURVE
RADIO IC
LA1837
FM LEVER SD COMP
AGC
27
RF AMP AM MIX
29
AM OSC
2
VT
Synthesiz e r IC
lC7213M
A IN
13 18 17
12 BITS PROGRAMABLE
DIVIDER
14 SWALLOW COUNTER
1/16, 1/17, 4 BITS
REFERENCE
1
DIVIDER
20
15
POWER ON RESET
6-2
FILTER LPF
23 22 21 20 19
FM
DECODER
AM
STEREO
SW
TUNER IND
AMP
IF-BUFFER
MUTE
AM IF AM DET
4 24 22 13 15
FILTER
3K9
3.3K
PD
16
PHASE DETECTOR
CHARGE PUMP
UNLOCK DETECTOR
DATA
UNIVERSAL
11 IF IN
SHIFT
COUNTER
REGISTER
STEREO/MONO
LATCH
9
IF REQ
8
7
6
CCB
2
I/F
3
4
5
18
L-OUT
AMP R-OUT
FM
AM
CE
DI
CLK
DO