Pioneer KEH-P4800 Service Manual page 32

Pin No. Pin Name
68 VDD
69 X2
70 X1
71 IC
72 XT2
73 TESTIN
74 AVDD
75 AVREF0
76 SL
77 MODEL0
78 MODEL1
79,80 NC
*PD4973A
80
1
20
21
*PD6278A
33
48
I/O Format Function and Operation
VDD
Oscillator output
Oscillator input
Connect to GND
Sub Clock terminal
I Test program mode input
A/D converter analog power supply (VDD)
I A/D converter standard voltage input
I Signal level input
I Model select input
I Model select input
Not used
61
60
41
40
16
1
Format
C
N
IC's marked by* are MOS type.
Be careful in handling them because they are very
liable to be damaged by electrostatic induction.
KEH-P4800,P4850
Meaning
C MOS
N Channel open drain
43