Vertical; Vertical; Initial Control Settings; Procedure Steps - Tektronix 2205 Service Manual

Adjustment Procedure—2205 Service
Equipment Required (See Table 4-1):
Calibration Generator (Item 1)
Leveled Sine-Wave Generator (Item 2)
5 0 -f l Coaxial Cable (Item 6)
Dual-Input Coupler (Item 7)
5 0 -0 Termination (Item 8)
See

INITIAL CONTROL SETTINGS

Vertical :

POSITION (both)
MODE
VOLTS/DIV (both)
VOLTS/DIV Variable (both)
AC-GND-DC (both)
Horizontal
POSITION
MAG
SEC/DIV
SEC/DIV Variable
Trigger
SLOPE
LEVEL
MODE
SOURCE

PROCEDURE STEPS

t. Adjust Channel 1 Variable Balance (R33)
a. Rotate the CH 1 VOLTS/DIV Variable control
fully counterclockwise.
5-8

VERTICAL

i
a d j u s t m e n t l o c a t io n s
at the back of this manual for adjustment locations.
Midrange
CH 1, NORM
5 mV
Cal detent
GND
Midrange
XI
0.5 ms
CAL detent
Positive (_r)
Midrange
P-P AUTO
EXT, EXT
10X Attenuator (Item 9)
Miniature Probe Tip to BNC Adapter (Item 10)
Alignment Tool (Item 11)
10X Probe (Item 12)
a n d ADJUSTMENT LOCATIONS 2
b. Position the trace on the center horizontal
graticule line using the CH t POSITION control.
c. Rotate the CH 1 VOLTS/DIV Variable control
clockwise to the GAL dSteht.
d. ADJUST-CH 1 Var Bal (R33) to set the trace
to the center horizontal graticule line.
e. Repeat parts a through d until there is no trace
shift between the fully clockwise and the fully
counterclockwise positions of the CH 1 VOLTS/DIV
Variable control.
f. Return the CH 1 VOLTS/DIV Variable control to
the CAL detent.
2. Adjust Channel 2 Variable Balance (R83)
a. Set Vertical MODE switch to CH 2.
b. Rotate the CH 2 VOLTS/DIV Variable control
fully counterclockwise.
c. Position the trace on the center horizontal
graticule line using the CH 2 POSITION control.
d. Rotate the CH 2 VOLTS/DIV Variable control
clockwise to the CAL detent.
e. ADJUST—CH 2 Var Bal (R83) to set the trace
to the center horizontal graticule line.
f. Repeat parts a through d until there is no trace
shift between the fully clockwise and the fully
counterclockwise positions of the CH 1 VOLTS/DIV
Variable control.