Onkyo NC-500 Service Manual page 27

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BLOCK DIAGRAM AND DESCRIPTION OF IC - 6
Q781:BU1923
RDS DECODER
Pin descriptions
Pin No. Symbol
1 QUAL
2 RDATA
3 Vref
4 MUX
5 V
6 V
7
V
8
CMP
9
10
11 V
12 V
13
14 XO
15 (N.C.)
16 RCLK
TE
L 13942296513
Input / Output circuits
Type A
10M
Type D
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Pin name
Demodulator quality Good data : High, bad data : Low
Demodulator data Refer to output data timing
Reference voltage 1/2 V
Input Composite signal input (refer to input/output circuits)
D D1
Analog power supply 4.5V to 5.5V
S S1
GND
S S3
Comparator input
C-junction (refer to input/output circuits )
T2
Test input Open or connected to ground
T1
SS 2
Digital power supply 4.5V to 5.5V
DD 2
XI
Connects to 4.332MHz oscillator
Crystal oscillator
(refer to input/output circuits)
Demodulator clock 1187.5Hz clock (refer to the timing diagram)
Type B
Type E
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Functions
(refer to input/output circuits)
D D1
Q Q
3 6 7 1 3
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2 9 9 4 2 8
Input/Output type
Type C
Type E
Type D
Type D
Type B
Type A
Type C
1 5 0 5 8 2 9 9 4
Type C
Type F
m
VREF
co
NC-500
9 9
2 8 9 9