JVC KS-FX820R, Service Manual

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KS-FX850R/KS-FX835R/KS-FX820R
2-18
1.Block Diagram
1~66
67~69
70
71
72
73
74
75
76
77
78
79
80
S3~S68
COM1~3
VDD
VDD1
VDD2
VSS
OSC
INH
CE
CLOCK
DI
DIMMER
NC
Segment Output.
Common Driver Output.
Power Supply Connection.
Used for applying the LCD drive 2/3 bias voltage externally.
Must be connected to VDD2 when a 1/2 bias drive scheme in used.
Used for applying the LCD drive 1/3 bias voltage externally.
Must be connected to VDD1 when a 1/2 bias drive scheme in used.
Power supply connection.
Oscillator connection. An oscillator circuit is formed by connecting an
external resistor and capacitor to this pin.
Display off control input.
Chip enable input.
Synchronization clock input.
Serial data input.
DIMMER Control signal output.
Non connect.
O
O
-
I
I
-
I/O
I
I
I
I
O
-
Pin No. Symbol Description
I/O
2.Pin Functions
LC75873NW (IC601) : LCD Driver
VDD1
VDD2
INH
OSC
VDD
VSS
COMMOM
DRIVER
CLOCK
GENERATOR
SEGMENT DRIVER
SHIFT REGISTER
ADDRESS
DETECTOR
COM3 COM2 COM1
S68 S67
S5 S4/P4 S3/P3 S2/P2 S1/P1