Tektronix 2212 Service Manual page 173

2212
Service Manual
Removal and Installation Procedures
Step 6. Disconnect the flat cable (20 leads) at the right side of the board from
the connector.
Step
7.
Disconnect the fan cable
(2
leads) at the front of the board from the
connector.
Step 8. Pull the focus potentiometer shaft at the left side of the board forward
and remove it from the instrument.
Step 9. Put the power-on extension shaft into the power-on position. Then
disconnect the shaft by pulling it forward.
Step
10.
Disconnect the CRT anode lead.
WARNING
I
The CRT anode lead retains a high voltage charge after the instrument
is turned off. To avoid electrical shock, disconnect the CRT anode
lead from the multiplier and immediate ground the lead to the main
chassis. Take care that the anode lead is kept away from cables and
components until it is discharged.
Step
11.
Remove two screws holding the ac- power input connector to the
chassis.
Step
12.
Remove five screws holding the board to the main chassis.
Step
13.
Move the board forward and remove it from the chassis.
Step
14.
To reinstall the power supply board reverse the above procedure,
being careful to check the orientation of the cables. Make sure to fasten
the ac-power input connector, before fastening the board holding
screws.
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