Selenium Rectifier Installation And Handling; Damages To Selenium Wafer; Selenium Rectifier Installation Instruction; Connecting The Test Leads - Honda C50 Shop Manual

82 5. ELECTRICAL SYSTEM
Seleni um wafer
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Axis
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D elective scratch D elective break
Figure 5- 37. Da mages to selenium wafer
,('"Frame
0
Selenium rectifier
locking nuts
Do not misalign the wafers
Figure 5- 38. Sel enium rectifier i nstallation instruction
Fi gure 5- 39. Co nnecting th e test leads
Selenium Rectifier Inst allation and Handling.
( 1 l Do not bend, cut o r scratch the selenium wafers.
(Fig.
5- 37)
121 The rectifier locking nut (painted nut) shou ld not
be loosened or the wafers rotated. (Fig.
5.38)
Any movement w ill cause the electro d e alloy to
peel, affecting th e rectification function, fu rt her,
it wi ll destroy t he moistur e-proofing and thereby,
shorten the life of the selenium rectifier.
1 31 T eke adequate caution not to permit rain , sa lt
water, wat er or battery electro lyte to get on the
selenium rectifier, in which case it will cause the
amount of current flowing in th e reverse dir ectio n
to increase. Further, if the selenium wafer i f
exposed to moisture fo r any length of tim e, oxide
will be produce on t he surface, resulting in a
shorted condition and the f ollowing trouble will
occur.
a. Battery wi ll become discharg ed.
b. Malfunction of the charging system.
141 Do not start the engine in a condition where t he
battery or the lo ad is not connected.
(the circuit being electri cally open )
Exa mple:
a. Loose or discon nect ed lead at t he battery
terminal.
b. Loose or disconnected terminals on the lead
between t he battery and the
EB
side o f th e
se lenium recttfier.
c. Running witho ut a battery.
d . Loose o r disconnect ed t ermina ls between t he
frame gro und and the
8
side o f the se lenium
re ctifie r IC50, C6 5, S50, S65 do es not use a
f rame ground, ho w ever, t he C50M, C65M use
a full wave rectifier and it is import ant that no
looseness at the frame exist!.
If t he engine sho ul d be start ed under the above
condition o r i f such condition should develop
whi le th e engin e is being operat ed , a high vo ltag e
wi ll be pro du ce d due to t he absence of any load
on t he coil, and this high voltage will cause a
large amount of current t o flow through the r e-
ctifier in the r everse direct ion, r esulti ng in th e
eventua l pun cturing of t he selenium rectifi er.
Therefo re:
a. Always maintain al l electr ical conne ctions in
t he circuit in a good con ditio n.
b. Und er no circumst ances sho uld t he engine b e
st a rted without the batt ery connected .
Ch eckin g the Condition of th e Se lenium Re ctifi er
I 11 Use se rvice t est er.
121 Test proced ure
a . Set t he se lecto r switch to "R esistance X 1 00 "
b. Use 6V as a power source
c. Sho rt a c ross t he
EB
an d
8
leads of fhe tester
and regulate th e adjust er knob so t hat t he
t est er indicator need le is pointing to "0" on
the "R esist ance X 1 00" sca le. (Fig.
5- 39)