Tektronix 1502C Service Manual page 162

Maintenance
Leading edge not at
Check chart recorder
No
CONTINUE
zero, wrong length,
or other extra
3 or
function modules.
with discontinuities.
Yes
±
Check for < 4 volts
TP4020 and TP4021
on main board.
No
Yes
Check digital delay Check analog delay Run Calibration
on main board. on main board. Performance Check.
7–15
1502C MTDR Service Manual
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