Welch Allyn Atlas - 620014

A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
Printhead
On/Off Switch
Temperature
Amplifier
Thermistor
Input
+24V Boost
(23.6 V nominal)
1
2
3
4
phase +
Connector Pin #
1346
+
++
++
++
Printhead
Connector
Rick Myers
Rick Myers
Mar 5, 1999
Mar 5, 1999
620014.dsn
5-39179 JAC 3/18/99 LPP
L.Phillips
Z. Psenicnik
J. Bello
3/22/99
3/19/99
3/19/99
REV
Description
ECN/ECO Init
Date Ckd
A Release to Production
620014 A
Printer Electronics
C
11Monday, March 22, 1999
Title
Size
Document Number
Rev
Date: Sheet of
Welch Allyn Inc.
Schematic:
Release For Production
Approved
Checked
Designed
Drawn
Initial Date
Rec-Data
U2-fb
Rec-Data-Latch
Q4-D
Rec-Supply-On
U2-comp
U3-10
U1-1
Q4-G
U1-2
Rec-Strobe
Rec-Clock
U2-Isense
+12V
Q6-e
U2-out
U3-8
Q4-s
U3-9
Strobe
+24V-switch
Clock
Latch
Strobe
Data
u3-clk
Rec-Motor-Step
clk
data-IO
U3-7
U2-RT
J3-6
u6-6
J3-3
J3-4
u6-clmp
u6-14
u6-11
J3-1
u6-3
U3-5
U3-6
d6-c
Thermistor2
Thermistor1
U1-3
q1-g
Q2-b
U3-3
n24Von
U2-Ref
Vpp
Vpp
u1-7
Rec-Temp
+5V
+12V
+5V
RecVdc
+24V
RecVdc
+12V
D
+5V
+5V
D
+5V
D
+5V
D
+5V
D
+5V
+5V
D
+5V
D
D
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
+24V
A
+5V
D
A
D
A
+24V
A
A A
A
A
A
+5V
+5V
+5V
A
A
C14
2200pF
TP27
Q4
MTP30N06VL
23
1
4
U5C
74HCT04
5 6
147
C18
.047uF
U5B
74HCT04
3 4
147
R22
4.22K
U5E
74HCT04
11 10
147
TP29
C11
.047uF
R19
3.16K
TP28
Q6
MMBT3904L
3
1
2
R13
10
R6
10K
TP14
R15
147
R16
19.6K
TP8
D3
BAV99L
1
3
2
R2
1K
TP10
R8 23.7K
R36
1.47K
TP24
Q2
MMBT3904L
3
1
2
+ C6
1uF
R14
10K
TP67
J3
CON6
1
2
3
4
5
6
+ C4
1000uF
TP66
C3
.01uF
+ C8
1800uF
C5 .01uF
TP68
L1
22uH
TP17
C2
.01uF
R7
84.5K
C13
5600pF
R9
10K
R5
1K
C10
.1uF
D2
MBRS340T3
U5F
74HCT04
13 12
147
D6
27V
13
U6
ULN2065
3
6
11
14
2
7
9
16
1
8
1B
2B
3B
4B
1C
2C
3C
4C
CLMP1
CLMP2
R24
1.96K
U2
UC3843A
3
57
14
1
10
8 12 9 11
VFB
ISENSERT/CT
VREF
COMP
OUT
PWR-GND Vcc GND Vc
TP9
C12
.047uF
R18
no-load
TP21
TP1
R35
1.47K
TP3
Q3
2N7002
3
1
2
TP19
R12
10K
+
-
U1B
MC34072
5
6
7
84
J2
CON16
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
TP23
C21
.047uF
R33
1.47K
R3
10K
+
-
U1A
MC34072
3
2
1
84
U3
PIC16C505
2
5
7
4
3
6
1 14
8
9
10
11
12
13
ClkIn/Osc1/RB5
RC5/TOCK1
RC3
Vpp/MCLR/RB3
Clkout/Osc2/RB4
RC4
Vdd
Vss
RC2
RC1
RC0
RB2
RB1
RB0
TP6
Q1
MTP30P06V
2
1
3
4
R11
5.11K
C19
.047uF
D1
27V
13
C1
.047uF
+
C20
47uF
U5D
74HCT04
9 8
147
U5A
74HCT04
1 2
147
R10
10K
C7
.01uF
TP54
TP26
R34
1.47K
J1
CON24A
1
3
5
7
9
11
13
15
17
19
21
23
2
4
6
8
10
12
14
16
18
20
22
24
R17
0.1
R1
51.1K
R4
9.09K