Pioneer VSX-405 Service Manual page 29

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