GE MASTR II Maintenance Manual page 10

LBI4898
MAINTENANCE
4.
5.
8
COLLECTOR
Figure 7 - Lead Identification
Trim the new transistor leads (if re-
quired) to the lead length of the
removed transistor. Cut the collector
lead at a 45° angle for future identi-
fication (see Figure 7). The letter
"C" on the top of the transistor indi-
cates the collector.
Apply a coating of silicon grease
around the transistor mounting surface,
and place the transistor in the mount-
ing hole. Align the leads as shown in
the Outline Diagram. Then hold the
body of the transistor and replace the
holding-down nut and spring-washer
using moderate torque (8 inch-pounds).
A torque wrench must be used for this
adjustment since transistor damage can
result if too little or too much torque
is used.
SOLDER ENTIRE LEAD FROM EDGE
OF MOUNTING HOLE TO END OF LEAD
~
SOLDER LENGTH
~----------
L E AD
==::::::s=f==rc=~==f.._
PRINTED
\--r-.--r-7--r
BOAR D
6.
7.
TRANSMITTER
HEATS INK
HOLD- DOWN NUT 8
SPRING WASHER
RC-2309
Figure 8 - Lead Forming
Make sure that the transistor leads
are formed as shown in Figure 8 so that
the leads can be soldered to the printed
circuit pattern, starting from the in-
ner edge of the mounting hole.
Solder the leads to the printed circuit
pattern. Start at the inner edge of
mounting hole and solder the remaining
length of transistor lead to the board.
Use care not to use excessive heat that
causes the printed wire board runs to
lift up from the board. Check for
shorts and solder bridges before apply-
ing power.
~-------------- CAUTION --------------~
Failure to solder the transistor leads
as directed may result in the genera-
tion of RF loops that could damage the
transistor or may cause low power
output.
MOBII,.E RADIO DEPARTMENT
GENERAl. ELECTRIC COMPANY • LYNCHBURG, VIRGINIA 24502
GENERAL. ELECTRIC
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