Elecraft K2 Owner's Manual - Manual (Page 142)

(S0 through S23 connected to DS1; only S0 and S23 shown)
First switch label corresponds to switch TAP,
Second label corresponds to switch HOLD.
VIM-838-DP 8-DIGIT LCD
(based on LED Vf=1.9V)
K2 Front Panel Board
Pushbutton Switches
To RF Board, P1
RIT/XIT Offset
Shaft Encoder
Keyer Speed
W. Burdick
6B595
LCD Driver
Backlight
6B595
Power Out
LED Array
R.F. Gain
E. Swartz
Elecraft
PRE/ATTN
1B,C,DP 1F,E,AN 2B,C,DP 2F,E,AN 3B,C,DP 3F,E,AN 4B,C,DP 4F,E,AN 5B,C,DP 5F,E,AN 6B,C,DP 6F,E,AN 7B,C,DP 7F,E,AN 8B,C,DP 8F,E,AN
PCF8566
CLK INH
5K (audio taper)
74HC165
(spare) /MIC RD
/MIC RD
68.1K, 1%
/SPD RD
PN2222A
DISPLAY
/SR RD
1 of 1
1A,G,D 2A,G,D 3A,G,D 4A,G,D 5A,G,D 6A,G,D 7A,G,D 8A,G,D
SR WRT
/SRCLR
1N5817
SR DIN
/BANK1
SR DIN SR WRT /SR RD
/SRCLR
2N3906
/NIGHT
V POTS
AUXBUS (NC)
/BANK1
/BANK2
/BANK2
ANT1/2
RECALL RF/ALC
CW REV
/BANK1
Rev. Sht.
/SYNC
SR CK
SH/LD
SR CK
ENC A ENC B
SR CK ENC A ENC B
BAND+
BAND-
STORE
LEVEL
SPLIT
Date
COM1 COM2 COM3 COM3 COM2 COM1
VLCD
.047
ICLK 100K IDAT
SRCK
SOUT
100K
ICLK IDAT
LEDs
SRCK
SOUT
FUNC
4.7K
4.7K
MENU RATE
MODE
XFIL
TUNE
SPOT
EDIT LOCK
AFIL
DS1
SDA SCL CLK VDD OSC SA0 VSS BP0 BP2 BP1 BP3
S10 S11 S12 S13 S14 S15 S16 S17 S18 S19 S20 S21 S22 S23
DS2
5K
5K
5K
S11
S15
S13
CLK SER /QH GND VCC
.01
S16 S14
S12
S10
.01
120
RP2 120
RP1
RCK SIN GND VCC
/Q0 /Q1 /Q2 /Q3 /Q4 /Q5 /Q7 /Q6
GND GND
ccw
ccw
ccw
ccw
SR DOUT
S23
S10 S11 S12 S13 S14 S15 S16 S17 S18 S19 S20 S21 S22 S23
R14 .01
Mic
PTT
GND
.01 .01 .01
RCK SIN GND VCC
/Q0 /Q1 /Q2 /Q3 /Q4 /Q5 /Q7 /Q6
GND GND
.01
GND
RP3
RP3
R13
RP3
RP3
10K
10K
10K
5K
ccw
R11
220
R9
470
A/B A=B
AGC
RIT XIT MSG
VOX REV
PF1 PF2 REC
S8 S2
S3
U2
C2
33
By
10 15 20 25 30
A0 A1 A2
10 15
S0 S1 S2
20
S3
21
S4 S5 S6 S7
25
S8 S9
30 35 40
U1
20
10
5A
R3
R4
R2
R5
R10
V- V+
Z1
S6
S4
S1
S5
S9
15 10
11 12 13 14
QH
16
5A
C9
C1
5A
5A
11 12 13 14 15 16 17 18 19
R12
10
10
12 13
/G
14 15 16 17 18
10 11 19
U3
D5
D6
cw
cw
cw
cw
S0
S4 S5 S6 S7 S8 S9
5A
S7
C8
J2
AF
DN
UP
5V
C4 C5 C7
5A 10 11 12 13 14 15 16 17 18 19 20
J1
5A
D2 D3
5A
12 13
/G
14 15 16 17 18
10 11 19
U4
C6
Q3
R1
D4
cw
5A
Q1 Q2
R7
R6
5A
S3 S2 S1 S0
NB
D2 D5
D6 D1
D7 D0
D4 D3
D5 D2 D6
D1 D7 D0
D0 D1 D2 D3 D4 D5 D6 D7
D3
D4
#1 #2 #3
#4 #5 #6
#8 #9 #7 #0
1 2 3 4 5 6 7 8 9
1 2 3 4 5 6
7
1 5
4 3
B
2
A
1
1 2
A B C D
3
E
4
F
5
G
6
H
7 9 8
1
2 3 4 5 6 7 8 9
1
2
3
4
5
6
7
8
9
9 8 3
4
2
5 6 7
1
2
3
4
5
6
7
8
1 2 3 4 5 6 7 8 9
9 8 3
4
2
5 6 7
6
5
4
3
2
1
8 7
R16 R15
15K 10K
.047
C3
Bargraph
Brightness
Control
/SPD RD
V POTS
SR DOUT
V POTS
MIC AF
/DOT-PTT
4.0V DAY (18mA/LED)
2.7V NIGHT (6mA/LED)
Mic Config.
AF Gain
/BANK2
5A
P1
1
2
3
4
5
6
7
8
2V
/BANK1 /BANK2
/ENC RD
Appendix B
These components are supplied with SSB adapter.
S7 - S16 can also be used as a numeric keypad.
C 10/6/02