Pioneer VSX 108 - AV Receiver, Руководство по обслуживанию

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32
VSX-108
No. Name I/O Function No. Name I/O Function
1 SW1
I
General-purpose input
Input data is able to transfer to the
microcomputer with serial
23 S9
O
Output for segment
Output is P ch open-drain and pull-down resistor
2 SW2 24 S10
3 SW3 25 S11
4 SW4 26 S12/G15 O
Output for segment and grid Output is P ch
open-drain and pull-down resistor
5 SO O
Serial data output from upper bit
Output is N ch open-drain
27 VEE I
Power supply pin 2
Connect a pull-down resistor of FLD driver ouput
6 SI I Serial data input from upper bit 28 S13/G14
O
Output for segment and grid
Output is P ch open-drain and pull-down resistor
7 VSS
−
Connect to system GND 29 S14/G13
8 SCK I Serial clock input at rising edge 30 S15/G12
9 CS I Serial chip select L: serial initialize, H: effective 31 S16/G11
10 K1
I Key scan data input
32 G10
O
Output for grid
Output is P ch open-drain and pull-down resistor
11 K2 33 G9
12 K3 34 G8
13 K4 35 G7
14 VDD I Power supply pin 1 Connect to system power 36 G6
15 S1
O Output for segment
Output is P ch open-drain and pull-down resistor
37 G5
16 S2 38 VDD I Power supply pin 1 Connect to system power
17 S3 39 G4
O Output for grid
Output is P ch open-drain and pull-down resistor
18 S4 40 G3
19 S5 41 G2
20 S6 42 G1
21 S7 43 VSS I Connect to system GND
22 S8 44 OSC I/O Connect a capacitor for oscillation
00202879-040 (BU2879AK) (DISPLAY PCB : IC702)
• FL Driver IC for VTR
•
Block Diagram
9
SW1 - SW4
CS
4 4 bit
Data
KEY Data
Latch
(4
×
6)
SEGMENT Driver
16 bit
×
15 word
Display Data RAM
16 bit Latch
8 bit Shift-Reg.
OSC
Control
Logic
Grid
Driver
1 - 4
8
SCK
6
SI
5
SO
7
V SS
44
OSC
38
V DD
38
V
EE
K1 - K4
S1 -S11
4
10 - 13
15 - 25
11
S12/G15 - S16/G11
26, 28 - 31
5
G10 - G1
32 - 37, 39 - 42
10
S/G Driver
•
Pin Function