IBM System/32 Introduction And Maintenance Manual page 170

4.4.0 50, 100, and 1251pm OSCILLO-
SCOPE FIGURES (Continued)
Good Belt Motor Drive Pulse
Horizontal 2 ms/div
Vertical 20V /div
Channel 1 - Belt Motor Phase A
(P4-1 or 13F42)
r- - -
-f- -f-
-~
-*-
- I -
-t- -f- - - -
.L. ---- - --
_
...
- ---
...
-
----- -----
...
_---
......
_-- ----- ----- -----
1ft.
f\
".
Bad Belt Motor Drive Pulse
High load
Horizontal 2 ms/div
Vertical 20V /div
Channel 1 - Belt Motor Phase A
(P4-1 or 13F42)
'""" - - r- - r- -
....,t.-
-f- -
~
r-
-I- -
........ I
•
-- - - - - -I-
-:r
-r- - -r-
Bad Belt Motor Drive Pulse
Phase capacitor removed
Horizontal 500 us./div
Vertical 20V /div
Channell - Belt Motor Phase A
(P4-1 or 13F42)
Emitter Pulse
Horizontal 500 us./div
Vertical Top trace .5V /div
Bottom trace .2V /div
Channel 1 Emitter Pulse
Positive input (13A44)
Negative input (13A42)
Do not ground either lead.
1000 mV minimum peak-to-peak
Channel 2 Print Subscans (13A47)
-
4-80