Tektronix 1720

REF INPUTMODE
VAR ON
S108 S125
S222
BARS
MODE
REF
INPUT
BARS
S142
S243
SCALE
FOCUS
SCALE
MODE
REF
FOCUS_FP
+11.8V
+11.8V
-11.8V
R412
20K
R429
20K
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
J303
CONNECTS
J303
TO P216
A3
+11.8V
+5V
INTENS
INPUT
BARS
+V/PAL
ON(VAR)
ON(AUX)
INTENS_SIG
INTENS_COM
INTENS_WIPER
R212
20K
+V/PAL
ON(VAR)
ON(AUX)
+5V
AUX ON
1
23456
R203
100
S518
PAL/+V1721 ONLY
S317
PHASE SHIFTER
STUD
J100
1
2
3
CONNECTS
TO J428
D5
J100
& J112
BOARD
<2>
A3
MAIN
J112
L122
10UH
C120C121
1000PF270PF
C222
15PF
C231
120PF
L221
10UH
+120
0
-120
STUD
STUD
STUD
STUD
o
o
o
L105
10UH
C110 C223 R220
243.043PF267PF
R123
365.0
PHASE
R100
470K
Q100
+V
1721 ONLY
6
5
DS321C
VECTPAL
NC NC
1721 ONLY
2
1
DS116A
2
1
DS321A
VAR
GAIN
VAR
XY_FP
100%_FP
EXT_FP
VAR_FP
AUX_FP
A_FPVECT_FP
+V_FP
PAL_FP
PAL_FP
+11.8V
R443
20K
BOARD
<5>
A3
MAIN
-11.8V
INT_FP
VECT_FP
CAL_FP
75%_FP
B_FP
CAL_FP
EXT_FP
+V_FP
TEST
6
5
DS132C
EXTINT
+5V
2
1
DS132A
4
3
DS132B
1
23456
R232
100
VAR
ONX Y
4
3
DS116B DS227
STATOR BOARD
1721
180PF
240PF
120PF
10PF
22PF
75PF
SIGNAL BOARD
CKT #
C121
C120
C222
C231
C110
C223
1720/1721 PAL-M
267PF
1000PF
270PF
15PF
43PF
120PF
R123
R220
365.0
243.0
523.0
294.0
A4 PHASE SHIFTER BOARD
ON
AUX
100%
6
5
DS247C
DS521
75% CH B
+5V
4
3
DS146B
2
1
DS247A
1
23456
R235
100
CH A
INT_FP
VAR_FP
XY_FP
2
1
DS146A
A_FP
B_FP
AUX_FP
100%_FP
75%_FP
NOT INSTALLED
4
3
DS247B
4
3
DS321B
1720/21 VECTORSCOPE
PHASE SHIFTER & FRONT PANEL <7>
A2 FRONT PANEL BOARD