Panel And Lcd Module Circuit; P Ower Supply - Oki S900 Service Manual

S900

4.2.4 PANEL AND LCD MODULE CIRCUIT

The circuit for Panel and LCD module controls the function of the entire module including the
LCD Display, the push button on the Control Panel, and LED display.
Pin assignment of LCD module
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Name
D.G.
KPDATA0
KPDATA1
D.G
KPDATA2
KPDATA3
D.G.
KPDATA4
KPDATA5
D.G.
KPDATA6
KPDATA7
D.G.
VCC
VCC
VCC
VCC
D.G.
D.G.
LCDA0
KPnECS
KPnWE
KPnOE
/KBRD Scan Key Read Chip Select
/KBWR Scan key Write Chip Select
/LCDCS LCD Module Chip Select
/LED0
/LED1
/LED2
D.G.
- 8V
/RESET
Function
Digital Ground
Data Bus bit 0
Data Bus bit 1
Digital Ground
Data Bus bit 2
Data Bus bit 3
Digital Ground
Data Bus bit 4
Data Bus bit 5
Digital Ground
Data Bus bit 6
Data Bus bit 7
Digital Ground
Digital Power Supply
Digital Power Supply
Digital Power Supply
Digital Power Supply
Digital Ground
Digital Ground
LCD Address 0
Panel Chip Select
Panel Write Enable
Panel Output Enable
LED Chip Select 0
LED Chip Select 1
LED Chip Select 2
Digital Ground
LCD Driver Power
LCD Reset Signal
4-6