Pioneer VSX-305 Service Manual - Page 29
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Also for Pioneer VSX-305: Operating Instructions Manual (28 pages), Operating Instructions Manual (29 pages)
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VSX-405, VSX-305
@ NJU9702D (MOTHER ASSY: IC1102)
DIGITAL DELAY IC
@ Pin Arrangement
@ Block Diagram
(Top View)
LPF1IN
LPF1 OUT
OP? OUT
OP1
IN
cCc1
cc2
OP2 IN
OP2 OUT
LPF2 IN
LPF2 OUT
1
24
AEF
DI
neeee
MAIN CONTROL
CLOCK
——DELC
Ml
DELAY TIME
OSCILLATOR
CONTROL
12
13
oe
XIN
XxOUT
REQ
SCK
DATA
IDSW
IDFLAG TEST!
TEST2
OGND
AGND
Von
Vcc
@ Pin Function
[Pin No.[ Abbveviation | ___PinName
| * WO]
[7 [veo
| Digit power supply | -_|
| 2 | xIN
'|
Oscillatorinput
=
TC
Connected to a 2 MHz ceramic oscillator.
| 3
| xouT
—_—_| Oscitlatoroutput
=|
COC Input to Pin @ when the external clock is used.
SCK
5
Shift clock
Serial data shift clock input
6
DATA
Data
Serial data input
7
IDSW
ID switch
External input pin for the 4th bit of ID code
IDFLAG
utputs a data input identification pulse and serial data.
Test 1
Test 2
Digital GND
mm
ean
AGND
Analog GND
=
rorsoor —~ [engeang—[-o
LPF2 IN
Low-pass filter 2 input
romaur [esas
arta [-6
ae
Pel
mel
ae
| 0 |
0
L = Normal mode
L = Normal mode
Forms the output side low-pass filter with external CR.
;
aj
:
:
Forms the demodulation
integrator with external CR.
= =
Operation amplifier 2 input
[oPziN
|
Current control 2
Current contro} 1
Reference
OP1 OUT
LPF1 OUT
Vcc
Demodulator ADM control
Modulator ADM control
Analog reference voltage = 1/2 Vcc
Forms the modulation integrator with external CR.
Forms the input side low-pass filter with external CR.
= ~
2
3
4
5
1
1
1
2
2
8
9
0
2 2
Analog power supply
43