Marantz Duetto SR110, Service Manual

Page: 17 / 32

25
IC03:BU1924
Block Diagram
560p
CMP
V
SS3
comparator
8th Switched
capacitor filter
anti-aliasing
filter
100kW
120kW
100kW
270p
MUX
Vref
2.2mF
V
DD1
*
1 Analog
Power supply
V
SS1
*
1
V
DD2
*
2 Digital
Power supply
V
SS2
XI
X0
4.332MH
Z
33pF
*
3
33pF
*
3
PLL
57kH
Z
RDS/ARI
PLL
1187.5Hz Bi-phase
decoder
Measurement
circuit
Differential
decoder
T1
T2
RDATA
QUAL
RCLK
*
1 : V
DD1
and V
DD2
are separated within the IC.
*
2 : Have V
DD2
(digital power supply) of a sufficiently low impedance.
*
3 : Match the capacitor constants with the crystal manufacturer.
1
2 3
4
5
6
7
8
9 10 11 12 13 14 15 16
RCLK
(N.C.) XO XI V
DD2
V
SS2
TI T2
QUAL
RDATA
Vref
MUX
V
DD1
V
SS1
V
SS3
CMP
Reference
clock
(4)
(3)
(5)
(6)
(12)
(11)
(13) (14) (10)
(7) (8)
(16)
(2)
(9)
(1)
Pin Descriptions
Pin No. Pin name Symbol Function Input/output type
1 QUAL Demodulator quality Type C Good data : High, bad data : Low
Refer to output data timing
6 V
SS1
7 CMP Comparator input Type D
C-junction (refer to input/output circuits )
8 V
SS3
GND
2 RDATA Demodulator data
9 T2
Test input Type B Open or connected to ground
10 T1
3 Vref Reference voltage
4 MUX Input
Type E
Type D
1/2 V
DD1
(refer to input/output circuits)
Composite signal input (refer to input/output circuits)
11 V
DD2
Digital power supply 4.5V to 5.5V
12 V
SS2
13 XI
Crystal oscillator Type A
Connects to 4.332MHz oscillator
(refer to input/output circuits)
14 XO
15 (N.C.) - -
-
Type C 16 RCLK Demodulator clock 1187.5Hz clock (refer to the timing diagram)
5 V
DD1
Analog power supply 4.5V to 5.5V
-
-
-
-
-