Tektronix 608 monitor Instruction Manual page 43

2. Melt a small amount of solder onto the component
lead connection. This replaces the flux, which may
have been removed during instrument cleaning, and
facilitates removal of the component.
3. Grip the component lead with a pair of long-nose
pliers. When the solder begins to flow, gently pull the
component lead from the board. If unable to separate
the lead from the board, try removing the other end of
the component.
NOTE
Some components are difficult to remove
from the circuit board due to a bend placed
in each lead during machine insertion of
the component. The purpose of the bent
leads is to hold the component in position
during a flow-solder manufacturing process
which solders all components at once. To
make removal of machine inserted compo-
nents easier, straighten the leads of the
component on the back of the circuit board
using a small screwdriver or pliers, while
heating the soldered connection.
4. Bend the leads of the replacement component to fit the
holes in the circuit board. If the component is replaced
while the board is mounted in the instrument, cut the
leads so they will just protrude through the board.
Insert the leads into the holes in the board so that the
component is firmly seated against the board, or as
6. Cut off any excess lead protruding through the
board (if not clipped in step 4).
flux-removing solvent. Be careful not to remove infor-
AND REPLACEMENT
@
Maintenance—608
CATHODE-RAY TUBE REMOVAL
Remove the cathode-ray tube (crt) as follows (see
Fig. 5-5).
Use care when handling a crt. Breakage of
the crt causes a high-velocity scattering of
glass fragments {implosion}. Protective
clothing and safety glasses should be worn.
Avoid striking the crt on any object which
might cause it to crack or implode. When
storing a crt, place it in a protective carton
or set it face down in a protected location
on a smooth surface with a soft mat under
the faceplate.
NOTE
This procedure and Figure 5-5 depict the
Option 30 instrument with the full ert
shield. However, the procedure is essen-
1. Remove the bezel assembly and snap-in implosion
shield with graticule by removing the 2 bezel securing
2. Remove any protective side cabinet panels to gain
3. Disconnect the 4 leads from the crt X and Y deflec-
tion plate pins, and the lead from the crt focus-
The red and black leads entering the crt
shield from the Low-Voltage Power Supply
board and rear-panel TRACE ROTATION
contro! are connected to the display-rotation
crt removal and need not be disconnected.
4. Disconnect the anode lead from the crt anode plug.
Ground this lead to the chassis to dissipate any stored
5. Remove the 5 crt rear-cover securing screws and
gently push on the crt base to slide the crt forward.
The crt front supports will slide out with the crt.
8. Remove the crt front supports and gently pull the
crt out from the front of the instrument while guiding
the crt anode plug through the hole in the crt shield.