Tektronix T921 User Manual

2 . Support the Time Base while
removing the retaining
screw
in the upper right corner (near the POSITION
control), the post by the LEVEL potentiometer, and the
post in the
lower right corner .
3 . Carefully remove the leads
from P2344 (a white-red
crt lead to the
-side
of
P2344 and a white-green crt lead to
the + side of P2344)
.
4 .
Remove
J2 (see Fig . 5-7) from the Interface board by
pulling the entire Time Base toward the right side of the
instrument . Be careful not to bend the pins .
To
replace the Time Base, reverse the above procedure .
To remove the Trigger board, unplug it from the Time
Baseby pulling up and toward the back of the instrument .
To remove the Timing board,
first remove the SEC/DIV
knob and the POSITION control shaft .
Then unplugthe
Timing board from the
Time
base
and pull the SEC/DIV
shaft back out of the front panel . To reinstall the timing
board, reverse the foregoing procedure .
REV . C JUL 1977
ATTENUATOR VERTICAL
AMPLIFIER
BOARD
Fig . 5-8 . T921 and T922 circuit board locations .
Service Information-T921/T922/T922R
Power Supply Board Replacement
To remove
the Low Vo .ltage Power Supplyfrom the
instrument
:
1 . Remove the
two retaining screws -holding the heat
sink to
the rear subpanel .
2 . Remove the top right and bottom left screws
(the
ones holding the Power Supply board to
the crt shield) .
The other two screws hold the
transformer to the Power
Supply board .
3 . Disconnect P7 from the Interface board by
lifting the
Power Supply board and transformer out
. (see Fig . 5-7) .
To
replace the Power Supply board, reverse the above
procedure .
Interface Board Replacement
To remove the Interface board
from the instrument :
1 . Remove the Vertical Amplifier and Time Base .
POWER

REAR
SUPPLY
SUBPANEL
BOARD
T700
1982-41
5- 1 5

Tektronix T921 Specifications

General

Brand	Tektronix
Model	T921
Category	Test Equipment
Language	English