Tektronix 442, Инструкция по эксплуатации

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Section 5—442 Service
MAINTENANCE
INTRODUCTION
This section of the manual contains information for
preventive maintenance, troubleshooting, and corrective
maintenance. Procedures for removal and replacement of
the cabinet are presented at the beginning of this section.
Should the instrument require reshipment to a Tektronix
Service Center for repair, refer to the repackaging instruc­
tions at the end of Section 2. Refer to Table 5-3 at the end
of this section for Maintenance Aids information.
C abinet Rem oval
To removethe442 cabinet, proceed asfollows (see Fig­
ure 5-1):
1. Attach the front cover on the 442 and position the
442 face down (supported by the cover) on a work bench
or table (move the carrying handle away from the front of
the 442).
2. Unfasten the rear cabinet frame from the rear panel
by removing the four Phillips-head rear foot securing
screws. Loosen the screw that secures the accessory
pouch to the rear cabinet frame and detach the accessory
pouch.
3. Remove the rear cabinet frame and slidethe cabinet
up off the back of the 442.
4. To re-install the cabinet and accessory pouch,
reverse the order of the foregoing steps.
M oving In terface B oard to Access Position
The Interface board can be moved to the access
position (to provide access to the component side of the
Interface board or the Horizontal board) by performing
the following steps (see Figure 5-2):
1. Remove the FOCUS and INTENSITY knob/shaft
assemblies by disconnecting them from the poten­
tiometers and sliding them out through the front panel
openings.
2. Use #1 and #2 Phillips-bit screwdrivers to remove
the four Interface board mounting screws indicated in
Figure 5-2A and slide the board edge out of the three
plastic circuit board holders that support the edge of the
board nearest the crt shield.
Figure 5-1. Cabinet removal.
REV A MAY 1980
5-1