Tektronix WFM 300A, Instruction Manual

Page: 187 / 212

+11.8V
DOWN
[RCL2]
1 LINE
S510
MODE
[WAVEFORM]
MODE
[LIGHTNING] [SWEEP]
S109 S309 S125
J100
LIGHT ENABLE
GRATICULE ILLUMINATION
672-0278-09 & BELOW
SCALE
<4>
A4
<4>
A4
R214
18.2K
/GLITSEL
+5V
-11.8V
R120
24.3K TL011
U121
I
3
O
1
C
2
TO U115B
PIN 6
CR215
C310
100UF
Q214
C215
.1UF
+15V
+5V
R117
1.00K
R222
4.7
L210
10UH
1
2
3
4
J500
FRONT
PANEL
1-2 ENABLE
2-3 DISABLE
P200
P100
J100
DS100
DS200
1
2
1 2 3
MAG COMPOSITE REFERENCE
S320 S243 S342
UP
FOCUS
SCALE
[RCL1]
ROW0
ROW1
S509
R430
20K
R410
20K
FOCUS
SCALE
+11.8V
-11.8V
-11.8V
1A
1
1B
2
2A
3
2B
4
3A
5
3B
6
4A
7
4B
8
5A
9
5B
10
6A
11
6B
12
7A
13
7B
14
8A
15
8B
16
9A
17
9B
18
10A
19
10B
20
11A
21
11B
22
12A
23
12B
24
13A
25
13B
26
14A
27
14B
28
15A
29
15B
30
16A
31
16B
32
17A
33
17B
34
J295
R333
20K
R445
20K
HPOSN
INTENSITY
SCALE
+11.8V
+11.8V
-11.8V
-11.8V
ON
FIELD
[RCL3]
[15 LINE]
INTENS
X5
CH 3
ROW2
S519
S520
CH 1
RECALL
[STORE]
LPASS
CH 2
S142 S143 S242
S530 S209 S220
A3A2 GRATICULE LIGHT BOARD
P800 DS300
1
2
R109
10.0K
+5V
Q116
C114
.001UF
C119
.1UF
5
6
7
U115B
LM393
2
3
1
8
4
U115A
LM393
R118
5.11K
R115
47.5K
R110
100.0K
+5V +5V -11.8V
Q121
R121
11.3K
<4>
A4
SCALE
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
J154
NC
R111
22.1K
R113
100.0K
FOCUS
FOCUS
TRACE ROTATION
+15V
Q222
GAMUT
DS420
+5V
ROTATE
DS421
ROW3
COL0
COL1
COL2
COL3
+5V
R233
20K
R420
20K
ROW0
ROW1
ROW2
VPOSN
VPOSN
HPOSN
TRACEROT
INTENSITY
TRACEROT
FOCUS
+11.8V
+11.8V
-11.8V
-11.8V
NC
-11.8V
-11.8V
+5V
J295
CONNECTS
TO J295
<7>
A4
CONTROL
BOARD
SB
+11.8V
+11.8V
+5V
A3
DS107
COL0
ROW3
COL1
COL2
POSLED
NEGLED
SE
SD
SC
SB
SA
NEG
DS109 DS108
NEGLED
POSLED
POS
DS123 DS124
1/2W
<12>
J216
CONNECTS
TO P320
ON CRT
H1
R219
180
1
2
J216
<4>
A3
Q221
R217
100.0
R218
100.0
C218
.1UF
TRACEROT
-15V
NC
<3>
<4>
A5
A3
W438
0 OHM
ZAXIS
ZAXIS
+15V
-15V
+5V
+40V
+100V
<11>
CONNECTS
POWER
J154
A1
SUPPLY
TO J4
1 2 3
LM317
LM337
POST REGULATORS
CR347
CR345
C246
.1UF
IN
3
OUT
2
A
1
U146
LM317
+15V
CR338
C338
.1UF
IN
2
OUT
3
A
1
U139
LM337
-15V +11.8V
CR238
-11.8V
LIGHTNING VECTOR
MAG 2 LINE
CH 2 CH 3
DS308 DS320
DS242 DS143
PARADE CAL
X5 2 FIELD
EXTERNAL
CH 1
DS309 DS220
DS142 DS342
WAVEFORM
1 LINE
DS307
D1
D2
SA
COL3
D3
D1
D2
D4
SC
SE
SD
SA
DIF'D
DS209
D3
D4
SA
COMPOSITE LPASS
DS243 DS208
BOWTIE INTERNAL
DS341 DS125
C342
10UF
R239
604.0
-11.8V
ADJ
R142
500
C242
10UF
R243
4.75K
+11.8V
ADJ
C343
10UF
R143
500
C243
10UF
R242
4.75K
R346
604.0
WFM 300A COMPONENT/COMPOSITE WAVEFORM MONITOR
NOTE:
AND SERIAL NUMBER RANGES.
SEE PARTS LIST FOR EARLIER VALUES
PART OF A3 MAIN BOARD
CONTROL CIRCUIT & FRONT PANEL <5>
A2 FRONT PANEL BOARD