Tektronix 2215A, Инструкция по эксплуатации

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Maintenance— 2215A Service
2. Unplug the crt anode lead connector from the High-
Voltage Multiplier lead located on left side of Power-Supply
shield and discharge it to the chassis.
3. Remove two front panel screws that retain the plastic
crt frame and light filter to the front panel. Remove the crt
frame and light filter from the instrument.
4. With the rear of the instrument facing you, place the
fingers of both hands over the front edge of the front
subpanel. Then, using both thumbs press forward gently on
the crt funnel near the front of the crt. When the crt base
pins disengage from the socket, remove the crt and the crt
shield through the instrument front subpanel. Place the crt in
a safe place until it is ready to reinstall. If the plastic crt
corner pads fall out, save them for reinstallation.
5. Remove the crt socket cover and cap from the rear of
the crt socket for reinstallation.
To reinstall the crt, perform the following steps:
6. Reinstall any plastic crt corner pads that are out of
place. Insert the crt, crt shield, anode lead, and Trace Rota­
tion leads through the front-panel opening. Make sure all
pins are straight and that the indexing keys on the crt base,
socket, and shield are aligned. Make sure that the ground
clip makes contact only with the outside of the crt shield.
7. Push the crt base into the socket. Verify that the crt
base and socket are flush together as viewed from the rear
and that the crt is seated properly in the front-panel
opening.
8. Reinstall the crt socket cap and cover to the rear of
the crt socket (removed in step 5).
9. Reinstall the crt frame and light filter; then secure
them with two front panel screws (removed in step 3).
10. Reconnect the crt anode lead to the High-Voltage
Multiplier (disconnected in step 2).
11. Reconnect the four deflection-plate wires and the
Trace Rotation connector (disconnected in step 1).
Power-Supply Shield
To remove the Power-Supply shield, perform the follow­
ing steps;
1. Remove the screw from the plastic power-supply
cover on the bottom section of the Main circuit board. Press
gently on the rear of the cover and slide it forward.
2. Remove the screw securing the Power-Supply shield
to the Main circuit board (located at the bottom of the circuit
board near the middle right side of the frame).
3. Remove three screws securing the Power-Supply
shield to the back of the chassis frame (two located at the
left rear of the shield and one located at the upper right rear
corner of the shield).
4. Remove the crt anode lead from the anode clip on the
side of the Power-Supply shield.
5. Remove the screw from the front upper right-hand
corner of the Power-Supply shield.
6. Lift the shield up and out of the chassis frame by re­
moving the right rear corner first.
To reinstall the Power-Supply shield, perform the follow­
ing steps:
7. Insert the shield into the chassis frame. Make sure
that the shield's right and back edges are in their chassis
frame guides, that the crt socket-wire assembly is in its cut­
out, and that the Alt Sweep board is in its plastic holder.
8. Reinstall the screw at the upper right-hand comer of
the shield (removed in step 5).
9. Reinstall the crt anode lead into the anode clip on the
side of the Power-Supply shield (removed in step 4).
10. Reinstall three screws securing the shield to the
back of the chassis frame (removed in step 3).
11. Reinstall the screw holding the shield to the Main
circuit board at the right side of the frame (removed in step
2
).
12. Reinstall the plastic power-supply cover on the bot­
tom of the Main circuit board and secure both the shield and
the cover with one screw (removed in step 1).
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