Tektronix 323, Инструкция по эксплуатации

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Maintenance— Type 323
Trigger G enerator Troubleshooting Chart. In itia l setup: TRIGGER a t + AUTO; VOLTS/DIV a t 5 DIV C A l; T IM E /D IV a t 1 mS; POSI­
TION controls “ in ” and d isp la y centered; POWER — O N ; T rig /H o riz C oupling switch a t INT — AC.
Note 3 : Certain w aveform s m ight not provide stable trig g e rin g in AUTO; use AUTO u n til d is p la y is
present, then sta b ilize the d ispla y w ith m anual trig g e r o p e ra tio n , i f necessary.
Fig. 4 -5 . T rigger G enerator troublesh ootin g chart.
CAUTION
Use extreme care when soldering w afer-type switch
terminals. Excessive heat or solder flo w in g around
and beyond the rivet w ill destroy the contact’s
springs tension. Excessive heat w ill damage plastic
switches.
Circuit Board Soldering Techniques. Use a 15 to 40
watt iron with a y8 inch tip. Keep the tip well tinned and
clean. Do not overheat components or circuit board. Do
not put excessive pressure on the board.
To remove a component, grip a lead with the tip of a
pair of needle-nosed pliers. Touch the tip of the soldering
iron to the connection. When the solder melts, gently pull
the lead from the board. If a clean hole is not left in the
board, reheat it and remove the solder with a solder remov­
ing device, or bore it out gently with a tooth-pick or similar
non-abrasive device.
Defective multiple-lead components that cannot be re­
moved by the above process should first be removed by
cutting the leads. Then remove the leads one at a time and
clean the holes as necessary. If the leads are not accessible,
remove the solder from each contact point with a solder
removing device, then work the component out, applying
heat alternately to the connections involved.
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