Kenwood RC-2000, Service Manual

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RC-2000
DESCRIPTION OF COMPONENTS / TERMINAL FUNCTION
Display Unit (X54-3290-00)
Ref. No. Application/Function Operation/Condition/Compatibility
IC1 Serial transmission buffer
IC2 Serial transmission buffer
IC3 AVR with reset function
IC4 Control microcomputer
IC5 ROM
Q1 Power switch
Q2~4,6, Dimmer
7,9,10
D1 Reverse flow prevention
D2 Reset circuit
D3-23 Over-voltage prevention
(Surge elimination)
D24~30 Key illumination
Display Unit (X54-3290-00)
CN No. Pin No. Name Function
CN1 1 D7 LCD driver data
2 D6 LCD driver data
3 D5 LCD driver data
4 D4 LCD driver data
5 D3 LCD driver data
6 D2 LCD driver data
7 D1 LCD driver data
8 D0 LCD driver data
9 RD LCD driver RD
10 WR LCD driver WR
11 A0 LCD driver A0
12 GND GND
13 CS2 LCD driver chip select
14 CS1 LCD driver chip select
15 RES LCD driver reset
16 VDD LCD driver VDD
17 VL Illumination LED control
18 VL Illumination LED control
19 PB Illumination LED power
20 PB Illumination LED power
CN2 1 GND
CN3 2 VR power
3 switch
4 VR voltage
5 SQL voltage