Pioneer PDP-4270XA Service Manual page 206

1
A
S1170B25UC-OTA (MAIN ASSY : IC4105)
S1170B15UC-OTA (MAIN ASSY : IC4106)
• Regulator IC
Pin Arrangement (Top view)
ON/OFF 1
VSS 2
B
NC 3
Block Diagram
VIN 4
Thermal
Shutdown
CIrcuit
ON/OFF
ON/OFF 1
CIrcuit
C
VSS 2
NJU26901E2 (MAIN ASSY : IC4704)
• Audio Delay IC
Pin Arrangement (Top view)
D
SDI 1
LRI 2
BCKI 3
VSS 4
Block Diagram
E
LRI 2
Serial Audio
Interface
BCKI 3
L/R in
SDI 1
F
COUNT[0]
206
1
2
5 VOUT
4 VIN
5
Overcurrent
Protection
CIrcuit
Vref
8
VDD
7
SDO
6 COUNT[1]
5
COUNT[0]
BCKI
LRI
Serial Audio
Interface
Delay RAM
7 SDO
L/R out
Control
Logic
5 6
COUNT[0]
PDP-427XD
2
3
Pin Function
No. Pin Name I/O
1 ON/OFF
2 VSS
3 NC
4 VIN
5 VOUT
VOUT
Pin Function
No. Pin Name I/O
1 SDI
2 LRI
3 BCKI
4 VSS
5 COUNT[0]
6 COUNT[1]
7 SDO
8 VDD
3
4
Pin Function
I Power OFF pin
−
Ground
−
Non connection
I Voltage input
O Voltage output
Pin Function
I
Serial audio data input
I LR clock input
I Serial clock input
−
Ground
I
Delay time setting 0
I Delay time setting 1
O Serial audio data output
−
Power supply (+2.5V)
4