Tektronix 2246 1Y, Service Manual

Page: 125 / 433

Adjustment Procedure—2246 1Y and 2246 Mod A Service
Table 5-1
Adjustment Interactions
ADJUSTMENTS OR
REPLACEMENTS MADE
ADJUSTMENTS AFFECTED
+
7
.5
V
A
D
J
U
S
T
1
GR
ID
B
IA
S
1
A
STIG
MAT
ISM
1
T
R
A
C
E
R
O
T
A
T
IO
N
1
G
E
O
M
E
T
R
Y
1
Z
-A
X
IS
R
E
S
P
O
N
S
E
1
R
E
A
D
O
U
T
J
IT
T
E
R
1
VE
RT
IC
A
L
O
U
T
P
U
T
G
AI
N
1
R
E
A
D
O
U
T
VE
RT
IC
A
L
C
E
N
T
E
R
IN
G
1
C
H
1
S
T
E
P
B
A
L
A
N
C
E
1
C
H
2
S
T
E
P
B
A
L
A
N
C
E
1
C
H
3
S
T
E
P
B
A
L
A
N
C
E
1
C
H
4
S
T
E
P
B
A
L
A
N
C
E
1
C
H
1
M
F
/L
F
GAIN
8
C
O
M
P
1
C
H
1
INP
UT
C
A
P
A
C
IT
A
N
C
E
1
C
H
1
INP
UT
C
O
M
P
X
1
0
1
C
H
1
INPUT
C
O
M
P
X
IO
O
1
z
w
<
CO
r l
X
o C
H
2
M
F
/L
F
GAIN
8
C
O
M
P
1
C
H
2
INP
UT
C
A
P
A
C
IT
A
N
C
E
1
C
H
2
IN
P
U
T
C
O
M
P
X1
0
1
C
H
2
INP
UT
C
O
M
P
X
IO
O
1
C
H
2
G
AIN
I
C
H
3
M
F
/L
F
C
O
M
P
1
C
H
3
G
AIN
i
”
CL
X
o
o
-J
N
L
l
X
X
u
C
H
4
G
AI
N
i
D
E
L
A
Y
-L
IN
E
H
F
C
O
M
P
1
C
H
3
H
F
C
O
M
P
]
C
H
4
H
F
C
O
M
P
!
H
O
R
IZ
O
N
T
A
L
X
I
GAIN
(T
IM
IN
G
)
I
H
O
R
IZ
O
N
T
A
L
X10
GAIN
(T
IM
IN
G
)
]
Z
M
<
CO
<
f—
z
o
P s J
w
X
o
X
H-
=>
o
Q
<
uu
X
n
z
o
n
H
<
X
h
(/)
M
CO
UJ
X
CO
<
X
r
CO
z
M
X
IH
1-
(0
in
o
<
r
CO
|Z
M
X
|W
,h
(1)
*
ID
O
tn
2
-5
n
s
T
IM
IN
G
I
X
GAIN
V
O
L
T
S
C
A
L
!
B
T
R
IG
G
E
R
B
A
N
D
W
ID
T
H
1
M
ID
-F
R
E
Q
U
E
N
C
Y
F
L
AT
N
ES
S
1
+ 7 .5 V ADJUST
u *
y
22 2
1
GRID BIAS
Y<
ASTIGMATISM
|_ |_ |_ L_ j_ L
TRACE ROTATION b I^J
_
1
I
GEOMETRY
Z -A X IS RESPONSE
L_
READOUT JITTER
1
VERTICAL OUTPUT GAIN
m
y iy
READOUT VERTICAL CENTERING
CH 1 STEP BALANCE
CH 2 STEP BALANCE
CH 3 STEP BALANCE
CH 4 STEP BALANCE
j
_ i _ l
—J
-J _ l
_J
CH 1 MF/LF GAIN S COMP
'
n
% J
CH 1 INPUT CAPACITANCE
1
1
CH 1 INPUT COMP X10
i 1 1
_ | _ l
-J —J
_J
_I
CH 1 INPUT COMP XiOO
1
n n
j
z
CH 1 GAIN
CH 2 MF/LF GAIN 8 COMP
J
%
_ j
-J
_ |
CH 2 INPUT CAPACITANCE
1
n
CH 2 INPUT COMP X10
~ 1
1 I
CH 2 INPUT COMP X100
J _ j
y ?
_J _i _1
CH 2 GAIN
n
1
CH 3 MF/LF COMP
1
CH 3 GAIN
_J _
j
1
- J —J
_ i _1_1
CH 4 MF/LF COMP
1
□
z J
CH 4 GAIN
OELAY-LINE HF COMP
_I
—1
%
—J__l
:
Z i _1
CH 3 HF COMP
“I
□
'
1
J
CH 4 HF COMP
_
—J
1
HORIZONTAL X I GAIN (TIMING)
_ j _ |
i_1_1
HORIZONTAL X10 GAIN (TIMING)
~ i n
j
'
J
READOUT HORIZONTAL GAIN
_
1
;
MAG REGISTRATION
Z
j
-J _ |
_ !
i
_1
_
“ Z
_1_1_1
A 0 .5 us TIMING
” ! n
~ \
i
**“1
B 0 .5 its TIMING
—
2 -5 ns TIMING
_i _1 z
z
X GAIN
VOLTS CAL
B TRIGGER BANDWIDTH
_ i _i _1
%
MID-FREQUENCY FLATNESS
!
—1 n
!
a *
CRT REPLACEMENT
$
%
%
%
The use of Table 5-1 is particularly important if only
a partial procedure is done, or if a circuit requires
readjustment due to a component replacement. To
use this table, first find the adjustment that was
made (extreme left colum n). Then move to the
right, across the row, until you come to a darkened
square. From the darkened square, move up the
table to find the affected adjustment at the heading
of that column. Check the accuracy of this adjust­
ment using the Performance Check Procedure in
Section 4. Then, if necessary, make a readjustment.
5-2