Welch Allyn Atlas - 620011

A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
Zero Adjust
Size Adjust
Vertical Amplifier
Horizontal Amplifier
Grid Voltages
Video Amplifier
Break Away CRT socket Board
6 Position flat ribbon cable
Connects Main CRT to CRT
socket Board
Ramp Generator
750uSec
16.7mSec
Vertical Sync
5.5uSec
31.7uSec
Horizontal Sync
To Yoke
Unused
Brightness
Adjust
Focus
Adjust
1/2W Carbon Comp
To Main
Board
5-39097 JAC 3/9/99 LPP
Rick Myers
Rick Myers
Mar 4 1999
Mar 4 1999
620011.dsn
L.Phillips
Z.Psenicnik
J.Bello
3/9/99
3/9/99
3/9/99
Modify Video Amplifier
Reduce RF Emissions
ZIP4/15/99JJC
5-39339
C
Increase Flex Cable to
3 inches
5-39831 6/24/99LPP
D
Width Coil (L3)
inductance range
changed
Width Coil Inductance
(L3) increased
B
LPP
5-40006 LPP 7/23/99
REV
Description
ECN/ECO Init
Date Ckd
A Release to Production
620011 D
CRT Deflection Board
C
11Friday, July 23, 1999
Title
Size
Document Number
Rev
Date: Sheet of
Welch Allyn Inc.
Schematic:
Release For Production
Approved
Checked
Designed
Drawn
Initial Date
U4.2
U1.2
u1.7
u1.6
u1.5
vcadj+ vcadj-
vadj
U1.3
u2.2
ramp
q4.b
q3.b
u2.7 u2.6
vert-
hlin hwide
+12filt
q5.c
q5.b
hor+
vert+
q1.b
q1.e
J3.5
J3.6
tube.g4
u4.4
q2.b
q6.d
vcadj
d6.c
Boost
Hor
+B
d5.c
Focus
Vg1
Vd
Vg2
d4.a
J3.1
u4-6
Grid2
C22-2
Video
Hsync
Vsync
Grid1
vidout
tube.vd
tube.g2
J3.3 tube.12V
tube.g1
tube.gnd
tube.g1
j2-3
hor-
q7-g
q8-b
q8-e
u2.1
+Vvid
+Vvid
+5V
+5V
+5V
+5V
+5V
+5V
+12V
+12V
+12V
+12V+12V
+12V
+12V
+12V
+12V
+12V
L3
15- 35uH
E1
2 1
R24
10K
D6
1N4148
12
+
C13
22uF
Q6
IRF640
2
1
3
4
D3
1N4935
1 2
R28
19.6K
R43
5.11K
E2
2 1
D5
1N4937
1 2
J1
CON6
1
2
3
4
5
6
R3
23.7K
D4
1N4935
12
D2
MUR120
1 2
C14
.01uF
R15 38.3
R17 10
C1
.1uF
R9
1.47K
D1
1N4148
12
R23
10K
R45 330
To CRT
Anode
T1
CRT-FBT
10
9
7
1
3
5
2
8
J4
CRT-Socket
1
2
3
4
5
6
7
U4F
74HCT04
13 12
C17
.01uF
D7
1N4148
12
U4C
74HCT04
5 6
R10 1K
R51
19.6K
U4E
74HCT04
11 10
C16
.01uF
R7
41.2K
Q7
BS170
1
2
3
+
-
U2A
MC34072
3
2
1
84
R16 10
J3
Flex6
1
2
3
4
5
6
R1
1K
R44 330
U4B
74HCT04
3 4
R2
7.50K
R26
1K
R11
1.96K
R50
1.96K
U3
MC78L05ACP
3 1
2
VIN VOUT
GND
R29 100K
+
-
U1B
TLC272
5
6
7
8 4
C7
.047uF
R25
215
R12
562
C6
.047uF
R37
1.96K
C15
.01uF
C8
.022uF
J3x
Flex6
1
2
3
4
5
6
R36
1.96K
C19
.01uF
C9
6.8uF
R48
100
R8
41.2K
L1
47uH
R6
41.2K
R41
681
R13
169
R27
10
C2
100pf
J2
CON5
1
2
3
4
5
C3
.047uF
R18
562
Q2
MPSW51A
3
2
1
C18
.047uF
C20
No Load
Q1
MPSW01A
3
2
1
R52
1.96K
R14
562
C22
.022uF
R30
100K
+ C12
22uF
R20
169
Q8
2N3904
3
2
1
Q4
MPSW51A
3
2
1
R31
10K
E5
2 1
Q3
MPSW01A
3
2
1
R21
562
U4D
74HCT04
9 8
R19
562
+
-
U1A
TLC272
3
2
1
84
+
-
U2B
MC34072
5
6
7
84
R22
10K
C4
.047uF
+ C5
22uF
U4A
74HCT04
1 2
R47 47K
E4
2 1
R46
47K
+ C11
1000uF
R4
10K
+
C10
1000uF
R5
42.2K
Q5
2N3904
3
2
1
E3
2 1
L2
15uH
R32
2.5Meg