Tektronix 7B51 Instruction Manual page 44

Maintenance-Type 7851
Check Type 7851
control settings
no sweep
Check sweep
/triggering MODE
output
generator and
must be Pop AUTO
trigger gener-
or AUTO_ Check
ator circuits.
sweep output.
Check vertical Unit
----------------------~1positioning and DC
balance.
Refer to indi-
cator oscillo-
scope manu-
al.
tno output
Set triggering
Check calibrator
-+-
output with test os-
cilloscope.
output
~
COUPLING to EXT not lit Check trigger
Check for sweep l--_n_o_t_l_it_ ...... __ and apply a 1 kHz I----~_Igenerator cir-
TRIG'D light. signal to the EXT cuit.
®
lit
Check sweep
generator and
horizontal
pre-amp cir-
cuits.
For a trouble not covered by this chart, use the
troubleshooting methods in steps 6 and 7 of the
troubleshooting techniques.
TRIG IN connector. ' -_ _ _ _
--1
sweep TRIG'D
lamp lights
Check trigger
pre-amp and
input cou-
pling circuits.
Fig. 4-2. Troubleshooting chart for the Type 7851.
4-5