Tektronix WFM 300A - Manual (Page 185)

3V
HORIZONTAL
LOW PASS
FILTER
Q842
R840
619.0
VR840
+11.8V
+11.8V
<2>
E4 CR726
R834
25K
HUNCAL
+11.8V
R729
2.00K
+11.8V
H CAL
H GAIN
R837
2.49K
R737
1.50K
+11.8V
+11.8V
R628
25K
C937
.1UF
-11.8V
R936
3.74K R937
13.7K
R836
221.0K
R733
0 OHM
R734
0 OHM
R835
8.87K
BOWTIE
GAIN
BOWTIE
TIMING
Q840
C840
1-5.4PF
Q846
R941
6.19K
R839
100.0
R940
47.5
R942
1.00K
R841
2.00K
R838
1.50K
R944
1.00K
R654
1K
+11.8V
+11.8V
-11.8V
-11.8V
BOWTIE
TIMING
<3>
A4
13
12
11
10
9
U658B
HI-303-5
C652
5.5-65PF
R555
750.0
VBOWTIE
/BOWTSEL
<3>
C2
C538
330PF
R444
511.0
R445
4.32K
+3V
8
10
1
4
6
12
5
2 3
1
4
U443
1496P
+11.8V
R343
5.76K
HORIZONTAL
OUTPUT
AMPLIFIER
R439
47.5
C438
330PF
TRACEINT
-11.8V
<3>
F5
R637
47.5
8 7
1
4
2
3
4
5
6
U658A
HI-303-5
Q445
+11.8V
+5V
R652
10.0K
C649
15PF
Q747
C745
105PF
R255
10M
C746
36PF
Q351
R649
909.0
R745
4.75K
R549
100.0
CLAMP
CLAMP
+11.8V
-11.8V
C255
10PF
3
2
1
8
4
U452A
TL072
C944
77PF
C945
70PF
R845
10.0K
R844
1.00K
R741
11.3K
R843
13.7K
R746
1.00K
+11.8V
+11.8V
-11.8V
HORIZONTAL
GAIN CELL
R736
15.0K
R743
100.0
R738
47.5
8
10
1
4
6
12
5
2 3
1
4
U742
1496P
-11.8V
2
3
1 4
6
5
Q737
<1> <1>
<3>
<3>
2 16
1
1 1
1
3
9
1
5
U174A
IH5352
RED
HREDSEL
HBLUESEL
RED
HREDSEL
HBLUESEL
+11.8V +5V
-11.8V
G4
A5
A5
HMAG1
2FIELD
1LINE
2LINE
G3
<1> <1>
HMAG2 HMAG3
HI HI LOW
HI HI HI
HI LOW LOW
R508
6.04K
4 14
3
U174B
IH5352
BLUE
/LINEGATE
BLUE
+11.8V
NC CR414
+REF
14
-REF
15
A1(MSB)
5
A2 6
A3
7
A4 8
A5
9
A6 10
A7
11
A8 12
VCC
13
RNGE 1
GND 2
OUT
4
COMP 16
VEE 3
U615
1408
Q415 R316
2.74K
R414
20.0
R740
953.0
R842
20.0K
R315
1.00K
R319
26.7K
+5V
-11.8V
-11.8V
+5V
Q525
DISABLE
H CLAMP
C448
.1UF
R548
22M
C516
3300PF
R448
47.5K
R527
100.0
R529
15.0K
R635
15.0K
1 2
J843
P843
+40V
+11.8V
-11.8V
<3>
<3>
HORIZ
GRAT
REG
B4
A3
C635
.1UF
C636
.1UF
C348
.1UF
R636
20.0
R551
25K
15 14
1
6
U981D
DG211
LPASS
/VLOWSEL
+11.8V
+11.8V -11.8V
5
6
7
U535B
LM393
/BLANK
-11.8V 6.2V
E C B
Q851
Q857
C848
.1UF
Q851
CR953
R847
20.0
R948
365.0
R849
301.0
R955
649.0
R953
649.0
VR948
+100V
Q857
R947
301.0
<12>
GREEN
TO CRT
HORIZ
DEFL
PLATES
H2
J857
J852
R857
5.11K
VECTOR
TIMING
VECTOR
BANDWIDTH
LF
C855
2.2PF
C856
1.2-4.0PF
R853
200.0
R956
26.7K
R855
49.9K
R854
49.9K
R850
49.9K
R852
200.0
C851
5.6PF
C852
2-18PF
C857
15PF
R535
12.1K
R436
100.0 C436
.1UF
3
2
1
8
4
U535A
LM393
+11.8V
+15V
CR634
C634
40PF
Q632
CR533
R634
1.00K
R632
2.00K
R533
1.18K
R532
100.0
-11.8V
E
E
B
B
C
C
R425
6.81K
R528
5.62K
R526
1.18K
R523
2.49K
R435
50
+11.8V
-11.8V
-11.8V
-11.8V
2
3
1 4
6
5
Q525 2
3
1
8
4
U419A
TL072
R415
7.15K
R514
2.26K
R314
1.00K
+5V
-11.8V
C616
270PF
NC
NC
NC
NC
<5>
<5>
<5>
C3
B1
A2
/GLITSEL
SCALE
TRACEROT
RATE1
/PARADE
/GRATSAMP
HDAC
/60HZSEL
+5V
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
J131
J131
CONNECTS
TO J131
H3
<9>
A4
CONTROL
BOARD
<3>
NC
NC
NC
NC
<3>
C3
D4 /LTNGSEL
VDAC /FLDGATE
/60HZSEL
/PARADE
RATE1
/LINEGATE
TRACEINT
/FLDGATE
C424
.5UF
Q421
R513
15.0K
R416
12.7K
R317
2.74K
5
6
7
U419B
TL072
R516
1.5M
R318
26.7K
-11.8V
-11.8V
3
2
1
8
4
U619A
TL072
Q513
R524
1.24K
R522
1.24K
R334
30.1
R525
1.82K
R515
3.09K
HMAG1
HMAG2
HMAG3
+11.8V
Q432
R430
1.00K
R429
1.00K
TIMING
0.2uS
TIMING
R333
30.1
R534
2K
R434
50
Q433
Q434
R824
10.0K
+3V
1uS
R329
1.00K
10uS
TIMING
HORIZ
MAG REG
R752
5.23K
R753
4.99K
R655
2K
R735
10K
R650
6.04K
-11.8V
Q751
R754
365.0
R755
301.0
R750
301.0
R756
5.90K
R751
5.90K
R757
20.0
R851
49.9K 2
1
3 6
4
5
Q753
RED
Q755
Q753
C C
B
E E
B
C757
.1UF
-11.8V
NC
NC NC
HORIZ
GRAT
SIZE
SHAPE
C3
HORIZ
GRAT
C929
2200PF C834
2200PF
10
9
8
U826C
TL074
R930
5K
R829
16.2K
+11.8V
-11.8V
NC
NC
C926
2.2PF
5
6
7
U826B
TL074
R225
3.01K
R926
10.0K
R924
10.0K
C624
33UF
IN 2
S/H
14
VLC 13
OUT 7
NUL 4
+V
9
HOLD 11
N/C
12
N/C
10
NUL
3
-V 5
U833
SMP11
R720
2.32K
C720
.1UF
R925
10.0K
R719
9.76K
R622
64.9K
5
6
7
U619B
TL072
C622
.1UF
HDAC
-11.8V
-11.8V Q518
R518
11.3K
R517
402.0K
R521
15.0K R621
64.9K
R519
82.5K
C521
.1UF
R520
82.5K
+11.8V +11.8V
NC
<5>
A3
FOCUS
/RAMPSEL
HPOSN
HMAG1
HMAG2
HMAG3
/RAMPSEL
/BLANK
HPOSN
+11.8V
-11.8V
WFM 300A COMPONENT/COMPOSITE WAVEFORM MONITOR
/GRATSAMP
VGRATSMP <3>
HORIZONTAL <4>
PART OF A3 MAIN BOARD
AND SERIAL NUMBER RANGES.
SEE PARTS LIST FOR EARLIER VALUES NOTE: