Welch Allyn Atlas Service Manual page 133

A
Defib Protect
RFI Filtering
4
TP501
R506
10K
+clamp
fVcc
TP502
R507
10K
-clamp
fVee
D501
Right-Arm
MMBD1503A
Left-Arm
1 2
J501
CON6 R501
51.1K
Right-Arm D501-3
1
2
3
N501
4
LAMP NEON C501
5
220pF
6
S E
E
Shield
D502
MMBD1503A
1 2
R502
51.1K
3
Left-Arm D502-3
N502
LAMP NEON C502
220pF
S E
D503
MMBD1503A
1 2
R503
51.1K
Left-Leg D503-3
N503
LAMP NEON C503
220pF
S E
R561 R562
34.8K 464K D504
TP553 TP554
MMBD1503A
1 2
c538-1 c539-1
C538 C539 D504-3
2
1000pF 330pF
E E
R504
51.1K
V-Lead
N504
LAMP NEON C504
220pF
S E
R563 R564
34.8K 464K
TP555 TP556
c541-1
c540-1
C540 C541
1000pF 330pF
E E
D505
BAV99L
1 2
R505
1
51.1K
Right-Leg D505-3
N505
LAMP NEON C505
220pF
S E
A
B
fVcc
+clamp
-clamp fVee
D506
5.1V
3 1
Input Buffers
Gain = 9.26
1 3
E
D507
5.1V
fVcc
TP503 TP504
R508 TP505
10K
U501-3
3
+
1
2
-
R509
C506 TP507 22Meg U501A R517
220pF MC34002 10K C510
TP509 0.1% 220pF
R509-1
fVee
E
R557 U501-2
22Meg
R518
fVcc 1.21K
VLdsOff 0.1%
TP511 TP512
R510 TP513
10K
E
U501-5 5
+
7
6
-
R511
C507 22Meg U501B R519
220pF MC34002 10K C511
TP519
TP520 0.1% 220pF
R511-1
fVee
E
R558 U501-6
22Meg
R520
fVcc 1.21K
VLdsOff 0.1%
TP523 TP524
R512
TP525
10K
E
U502-3 3
+
1
2
-
R513
C508 22Meg U502A R521
220pF TP531 MC34002 10K C512
0.1% 220pF
TP533
R513-1
fVee
E
R559 U502-2
22Meg
R522
fVcc 1.21K
TP538 VLdsOff 0.1%
TP539
R514
TP540
10K
E
U502-5
5
+
7
6
-
R515
C509 22Meg U502B R523
220pF TP542 MC34002 10K C513
0.1% 220pF
R515-1 TP543
fVee
E
R560 U502-6
22Meg
R524
1.21K
TP561
VLdsOff 0.1%
Q501 Q502
2N7002 2N7002
E
3 2 2 3
TP560
Sw-RLD-V
U504
3 2
S1 D1
1
Sw-RLD-RL
IN1
14 15
S2 D2
16
Sw-RLD-LL
IN2
11 10
S3 D3
9
Sw-RLD-LA
IN3
6 7
S4 D4
8
Sw-RLD-RA
IN4
R516
13
fVcc V+
4 10K
fVee V-
TP550 5 RL-mux
GND
DG202CSE
E
TP559
B
C
U501 U502 U503 U504 U505 U506
+ C534 C518 C520 C522 C524 C526
4.7uF .047uF .047uF .047uF .047uF .047uF
E E E E E E E
C535 C519 C521 C523 C525 C527
4.7uF .047uF .047uF .047uF .047uF .047uF
E E E E E E E
RA
A/D Inputs
LA
Lead Select
Leads Off
LL
V+
fVcc
Wilson U505
4051
Network
RA
13 3
X0 X
RA
14
X1
LA
TP508 15
X2
R529 10K aVR 12
X3
aVL 1
X4
aVF
5
X5
R530 10K V- 2
X6
4
X7
TP510 6
INH
R531 10K 11
A
10
E
B
9
C
R532 10K
TP515
E
R533 10K
fVcc
U506
4051
R534 10K LA
13 3
X0 X
LL
14
X1
LL
15
X2
RA
TP521 12
X3
LA
R535 10K 1
X4
LL
5
X5
V+
2
X6
R536 10K 4
X7
6
INH
R537 10K 11
A
10
B
9
E
C
E
TP535 TP536 TP537
fVcc
TP547
TP548 U503B
MC34002
U503-5
5
+
7
VLdsOff
6
-
C536 R556
f+1.24V
.01uF
10K
fVee
E E
TP549 fVcc
U503A
vRL
MC34002
3
+
1
2
E
-
TP551 U503-2
RLD Amp
R527 fVee C514
1K 0.1uF
C514-2
R528 TP552
51.1K
C
D
U507 U508
C528 C530 C532
.047uF .047uF .047uF
E E
C529 C531 C533
.047uF .047uF .047uF
E E
fVcc
TP506
mux-
3
+
diff-
1 C544
1000pF
2
-
Diff Amp
U507A
Gain = 1
MC34002
R544 R546
10K 0.1% 10K
fVee U508-3
fVcc
fVcc TP522
fVee
TP516
TP557
R545
3
+
mux+ 10K 0.1%
5 1
+
7 diff+ 2
-
U508A
6
-
AD712
U507B TP514
MC34002
C542
fVee 220pF
fVee u508-2
R547
10K diff-out
0.1% C545
TP528 TP529 1000pF
fVee
E E
Mux-LdS-A
Mux-LdS-B
Mux-LdS-C
TP532
R555
30.1K
f+5V
R525
10K
R526
10K
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
0.1%
TP558
C543
.047uF
fVcc
R565
121K
4
-
1
3
+
U509
LMC7101
E
fVee
High Pass (0.05Hz or 0.5Hz)
Gain Stage
Low Pass (150Hz)
fVcc
Gain = 74
TP517
C515 R550
TP518
3.3uF 19.6K
ecg-hp U508-5
5
+
7
An-ECG
6
-
C516
R548 R549 .047uF U508B
1Meg 110K AD712 R551 C517
73.2K .01uF
E
Q504-d fVee
U508-6
E
TP526 TP527
R552
1K
TP530
E
Q504
1
2N7002
Q504-s R553
100K
1 Q504-g
Sw-MonBw
Q505
2N7002
E
Welch Allyn Inc.
Date
Schematic: 620017.dsn
Mar 5, 1999
Mar 5, 1999
Title
ECG Amp
3/16/99
Size
Document Number
3/16/99
C 620017
3/16/99
Date: Wednesday, July 14, 1999 Sheet 5 of 8
E
Ckd
LPP
LPP
LPP
4
3
2
1
Rev
E