Tektronix PG 501 Instruction Manual page 15

Servicing Information-PG 501
3. Plug-In Extension. Tektronix 067-0645-02 Calibra-
Preparation
tion Fixture. (Not mandatory for this procedure.)
NOTE
Do not use the Plug-ln Extension to plug the PG 501
into any instrument other than the TM 500 Series
Power Module.
4. 10X Attenuator . Tektronix Part No . 011-0059-02
recommended.
5. 50 S2 Coaxial Cable. Tektronix Part No . 012-0057-01
recommended.
Do not preset internal controls unless they are known to
be significantly out of adjustment, or unless repairs have
been made in the circuit. In these instances, the internal
adjustments can be set to midrange .
3-2
1 . Remove the cover from the left side of the PG 501
and, if necessary, from the right side . Blow off accumulated
dust with low-pressure compressed air.
2. Insert the PG 501 into the left or right compartment ,
(depending on which adjustments are to be made) if a
multi-plug-in Power Module is used . (Note : It may be
convenient to use the plug-in extension, Part No . 067-
0645-02, to make internal adjustments without inserting
the PG 501 into the Power Module . However, it is not
mandatory for this procedure .
Preliminary Considerations
3. If the plug-in extension is not used, remove the Power
Read the Operating Considerations in Section 1 before Module cabinet cover to gain access to the PG 501 internal
adjusting the PG 501 .
adjustments .
This instrument should be adjusted at an ambient
4. Apply power to the PG 501 by pulling out on the
temperature between +20° C and +30° C (+68 ° F and +86° F)
Power Module PWR button .
for optimum performance .
5. Refer to the Controls and Adjustments foldout page
in this section for internal adjustment procedures .
NOTE
Normally, the + and - Output Compensation capacitors
(C143 and C183) will not require adjustment . However, if
if a ma/function is detected during adjustment, refer
output amplifier transistors 0140 or 0180 are replaced, or
to system maintenance in the Power Module instruc-
if it is suspected that aberrations are excessive, C143 and
Lion manual for troubleshooting techniques, parts
C183 should be adjusted as described in the adjustment
removal and replacement procedures, parts ordering
procedure.
information, etc.
REV . B, MAY, 1977 ,