Welch Allyn Atlas Service Manual page 131

A
U702
fVcc
C715
.047uF
E
4 fVee
C717
.047uF
E
-Clamp
D701
MMBD1503A
1
R701
1.96K
D701-3
Right-Arm
3
TP701
D702
MMBD1503A
1
R702
1.96K
D702-3
Left-Arm
TP706
D703
MMBD1503A
1
R707
1.96K
D703-3
TP710
D704
MMBD1503A
2
1
R708
1.96K
D704-3
TP721
1
A
B
U703
C716
.047uF
E
C718
.047uF
E
Respiration
Drive
Circuit
f+5V
+Clamp
2
TP702 TP703
C701 R703
1000pF 31.6K
C701-1 RespDr+
5 2
Q D
TP704
3
CLK
6
Q
2
E
TP705
C702 R704
1000pF 31.6K
C702-1 RespDr-
fVcc Respiration
Diff Amp
2
TP708
C706
TP709
330pF
U702-3 3
+
1
2
-
U702A
TP711
R709 AD712 R711 R715
464K 15.8K 3.16K
fVee U702-2
E
R712
TP714
1K
2 fVcc
U702B
TP720
C707
E
330pF
AD712
U702-5 5
+
7 U702-7 TP722
6
-
R713
1K
R710
464K fVee
U702-6 TP715
E
R714
15.8K
E
B
C
f+5V
12
D
11
CLK
E
+ C719
4.7uF
E
U701A
74HC74
resp-clk
Resp-Off
d705-c
U702-1 D705 B.W. = .06Hz to 16 Hz
MMBD354LT1
R716 C712
1
3.16K 3.3uF
Resp-AC
3
2
fVee
R717 R718 R719
3.16K C711 825K 51.1K
0.1uF
TP716
Q701-d
2
1
E E E
3
U703A
AD712
Q701
MMBF4393L
fVcc
E
C
D
9
Q
8
Q
U701B
74HC74
E
iso+5Vdig iso+5Vdig
R705
TP723
2.15K
R725
2.15K
u710-6 8
6
C721
100pF 5
D E
D E
TP707
R724
196K
Resp-DC
C720
.047uF
E
fVcc Gain =1000
B.W. = 10Hz
TP712
R720
TP713
100K
U703-5 5
+
7
An-Resp
6
-
U703B
C713 AD712
0.1uF
R721
fVee 316K
E
U703-6
TP718 TP717
R722
TP719 316
3
C714
.047uF
E
D706
MMBD1503A
1 2
Resp-Reset
R723
1Meg
E
Initial
Drawn
Rick Myers
Designed
Rick Myers
Checked
L. Phillips
Approved
Z. Psenicnik
Release For Production
J. Bello
D
E
REV Description ECN/ECO Init Date
A Release to Production 5-39121 JAC 3/15/99
B See ECN worksheet 5-39455 LPP 4/27/99
Improvements for ESD, RFI,
D and Fast Transients, Correct 5-39821 LPP 6/24/99
Respiration Diff-Amp Topology
Mods to U2 clock line, Resp
E gain amp, ECG supply and 5-39936 LPP 7/9/99
NVRAM pullup
Isolation
Barrier
C705
0.1uF
+5V
U710
HCNW4503
E
2
R706
215
iso701-a
3
FE-Pwr-Sync
Welch Allyn Inc.
Date
Schematic: 620017.dsn
Mar 5, 1999
Mar 5, 1999
Title
Respiration
3/16/99
Size
Document Number
3/16/99
620017
C
3/16/99
Date: Wednesday, July 14, 1999 Sheet 7 of 8
E
Ckd
LPP
LPP
LPP
4
3
2
1
Rev
E