Tektronix TAS 465, Service Manual

Page: 134 / 268

6Ć26
4. Carefully align the three holes on the menu flex circuit to the locator
studs on the front of the main chassis. When the alignment is correct,
press the flex circuit against the chassis so it adheres to the chassis.
5. Clean the surface of the menu flex circuit just installed using isopropyl
alcohol and a clean, lintĆfree cloth.
6. Repeat all procedures performed in reverse order to reassemble the
instrument.
The following procedure describes how to remove the A1 Analog board
Ċ This procedure requires that the
following procedures be performed first:
H Rear Cover Removal
H Cabinet Removal
H Front Trim Removal
1. Set the oscilloscope so its top side is down on the work surface and its
front is facing you.
2. Disconnect the delay line from its holder and at connector J68 on the
Analog board.
3. Disconnect the cables at connectors J50 and J67 on the Analog board.
4. Disconnect the cable to the rear panel ZĆaxis connector.
5. Using Figure 6Ć14 as a guide, remove the four TĆ15 Torx R screws securĆ
ing the attenuator assembly to the front of the chassis. Next remove the
four TĆ15 Torx R screws securing the attenuator board to the chassis.
6. Lift the attenuator assembly away from the oscilloscope to complete its
removal.
7. Replace the attenuator assembly by reversing the removal procedure.