Radio Shack TRS-80 Service Manual page 15

4. To remove the Disk Drive in the bottom position, you
must first remove the
Disk
Drive Power Supply.
5.
After removing the Powe, Sul)ply, remove the FDC
inter·connect cable from the rear of the Drive.
6.
Remove the four screws and washers (two
on
each
side)
whidl connect the Drive to the Disk Mounting Bracket.
7.
Disconnect the power supply connector from the bot·
tom of the top board in the Disk Drive and also remove
the ground wire from the rear of the Drive.
VIDEO MONITOR (CRTI AND VIDEO BOARD
1. Disconnect the four color coded wires with spade lugs
from the CRT yoke. {Be sure to note their positions.)
2. Disconnect the cOflnector on the rear of the CRT neck.
WARNING
There may be a high voltage ctIirge on Ihe high voltage
anode. To discharge, connect one end of a wire to a
known good ground end connect the other end of the
wire to the blade of a common screwdriver. Insert the
screwdriver blade under the suction cup and touch it
to the clip holding the wire to the CRT.
B
3. Insert a common screwdriver under the suction cup on
the high·voltage anode wire on the side of the CRT. Use
the screwdriver
10
compress the clip holding the wire to
the tube and pull the wire hee.
4.
Remove the ground wire fastened directly to the Video
Board.
5. Remove the upper right and I't>wer reft nun and washers
which hold the CRT in place.
CAUTION
U dropped, the CRT may implode. To avoid this kind of
accident. support the CRT while performing the next
step.
6. Remove the remaining l~w,r right and upper leh nun.
and washers and carefully remove the CRT.
7. Disconnect Ihe CPU cable connector from the Video
Board.
8. Remove the two screws fastening the VidllO Board to the
Case Top and carefully
lift
out Board.