Tektronix WFM 300A - Manual (Page 181)

C370
.1UF
R370
4.87K
R471
2.74K
+11.8V
R570
576.0
NC
NC
2 3
1
1
2
1
3
4 5
U981A
DG211
+5V +11.8V
<1>
<1> GREEN
BLUE
GREEN
BLUE
COMPONENT TO GBR TRANSCODER
G1
G3
NC
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
1
0
1
0
1
1
1
1
1
2
1
2
1
3
1
3
1
4
1
4
J200
GREEN
BLUE
G4
FOR SPARE TRANSCODER BOARD
R785
820
R787
585.8
R786
619.0
R783
2.386K
GREEN
BLUE
<1>
3
2
1
4
1
1
U883A
34085
RED
BLUE
GREEN
RED
+11.8V
-11.8V
1 1
2
2
3 3
4
4
5 5
6
6
7 7
8 8
9 9
10
10
11 11
12 12
13 13
14 14
J180
1 1
2
2
3 3
4
4
5 5
6
6
7 7
8 8
9 9
10
10
11 11
12 12
13 13
14 14
P180
NC
10 11
9
U781C
DG211
7 6
8
U781B
DG211
GREEN
+5V +11.8V
-11.8V
J978
CONNECTS
TO J501
D3
1
1
2
2
3
3
4 4
5 5
6
6
J978
+11.8V
Y INVERT
AMPLIFIER
Q471 Q470
Q570
R470
6.98K
R572
47.5
R573
18.2K
R571
1.82K
R472
2.00K
R469
71.5K
+11.8V
<3>
1V VIDEO
A1
VSIG2
NC
C573
.1UF
C469
.68PF
C470
.68PF
R473
6.81K
C675
.1UF
+11.8V
+11.8V
-11.8V
8
6
7
U574A
CA3046
1
1
9
1
0
U574B
CA3046
1
4
12
1
3
U574C
CA3046
CR473
R374
6.81K R373
3.92K
+11.8V
+11.8V
1
2
3
4
5
U574D
CA3046
<3>
<6>
A5
GBR
BOARD
A4
/YINVERT
-11.8V
7 6
8
U981B
DG211
15 14
1
6
U781D
DG211
2 3
1
1
2
1
3
4 5
U781A
DG211
RED
BLUE
-11.8V
5
6
7
U883B
34085
RED
R784
1.15K
R782
823.0
R885
1.111K
R886
626.0 R884
1.8K
R788
1.111K
R882
626.0
RED RED
A3A1 TRANSCODER BOARD
R985
823.0
R986
585.8
R988
585.8
R983
823.0
R987
1.3K
<3>
10
9
8
U883C
34085
A5
Q878
10 11
9
U981C
DG211
R878
15.0K
R879
10.0K
/RGBIN
+5V
C482
.1UF
3
2
1
8
4
U485A
TL072
R675
100.0
R474
20.0
R576
20.0
R382
90.9K
R383
30.1K
+11.8V
+11.8V
-11.8V
5.1V
R575
20.0
R574
20.0
R476
100.0
VR675
R482
10.0
NC
NC
GAIN
CELL
VERT
8
10
1
4
6
12
5
2 3
1
4
U479
1496P
VERT
GAIN
C379
.1UF
R705
150.0K
R479
10K
R800
20K
R484
7.15K
+11.8V
+11.8V
-11.8V
2
3
1 4
6
5
Q483
R379
11.0K
R704
10.2K
R478
36.5K
VCAL
V GAIN R728
25K
+11.8V
EXTERNAL
REFERENCE
INPUT AMP
6.2V
C193
62PF
CR190
C187
.1UF
C290
.1UF
R293
187.0
R193
3.92K
R190
6.81K
VR190
Q191
+11.8V
+11.8V
+11.8V
8
6
7
U191A
CA3046
1
1
9
1
0
U191B
CA3046
J100
REAR
PANEL
REAR
PANEL
EXT REF
INPUT
W191
W190
J120
C197
47UF
R195
1.00K
R194
15.0K
J191
J190
E100
E120
R189
200.0
R187
8.25K
R196
1.50K
R188
3.01K
R192
1.00K
+11.8V
-11.8V
-11.8V 1
2
3
4
5
U191D
CA3046
1
4
12
1
3
U191C
CA3046
<3>
A4
2 16
1
1 1
1
3
9
1
5
U264A
IH5352
INTREF
+11.8V
+5V
-11.8V
UNCAL
R730
4.75K
CR727
HUNCAL
+11.8V
DS700
<4>
<1>
B1
H1
R477
47.5
R586
1.00K R585
16.9K
R583
2.00K
VSIG1
+11.8V
0 VOLT
REGISTRATION
C581
2.2PF
C582
4.7UF
R579
825.0
R581
47.5
R483
100.0K
R500
20K
R580
2K
R582
1.33K
+11.8V
-11.8V
V BAL
CALIBRATOR
AMPLITUDE
C584
100PF R485
909.0
R584
200
-11.8V
Q579
Q581
C684
10UF
R683
5.49K
R684
2.49K
R680
39.2K
R578
10.0K
R577
100.0K
U683
431C
-11.8V
<3>
CALIBRATOR
A4
CALTIME
4 14
3
U264B
IH5352
R264
100.0K
R262
10.0K
R263
10.0K
+5V
-11.8V
Q263
<1>
<3>
A4
G1
R186
3.92K
GREEN
EXT/INT
-11.8V
-11.8V
WFM 300A COMPONENT/COMPOSITE WAVEFORM MONITOR
NOTE:
VERTICAL GAIN <2>
AND SERIAL NUMBER RANGES.
SEE PARTS LIST FOR EARLIER VALUES
PART OF A3 MAIN BOARD