Honda C65 - Selenium Rectifier Installation and Handling; Damages to Selenium Wafer; Selenium Rectifier Installation Instruction; Connecting the Test Leads

82
5. ELECTRICAL SYSTEM
Sele ni um wafe r
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I I
I I
I I
I I
Axis
I I
I
I
D elect ive scratch D elective break
Figure 5- 37. Damages to selenium wafer
,('"Frame
0
Selenium rectifier
l ocki ng nuts
Do not misalign the wafers
Figure 5- 38. Seleni um rect ifi er i nstallation instruction
Fi gur e 5- 39. Co nnecting the te st leads
Selenium Rect ifier Insta ll ati on and Handling .
( 1 l
Do not bend, cut o r scra tc h the seleni um wafers .
(Fig.
5- 37)
121 The rectifier lo cking nut (pain ted nut) should not
be loosened or the wa fers ro tated. (Fig. 5.38)
Any movement will cause th e elec tr ode alloy to
peel, affect i ng th e re ctification function, fu rt her,
it wi ll destr oy t he mo is tur e-proofing and there by,
shorten
the li fe of the selenium re cti fier.
1 31 T eke adequate cau t ion not to permit rain, sa lt
water, wa t er or battery electr oly te to get on the
selenium rec t ifier, in which case it will cause the
amo u nt of cur rent flow ing in th e reverse dir ect ion
to increase. Further, if the seleni um wa f er if
exposed to mois ture fo r any length of time, ox ide
will be produce on t he surface, re su lt ing in a
shorted con di tion and th e f ollowing trouble will
occur.
a. Batter y wi ll become disc harg ed.
b. Malfunction of the charg ing system.
141 Do not start the engine in a cond it ion where the
battery or the lo ad is not connected .
(the
circu it be ing el ectri ca lly open )
E
xa mple:
a. L oo se or dis con nect ed lead at the batter y
terminal.
b. L oos e or disco n nected term i nal s on the lead
be t ween the battery and the EB side of the
selenium
r ec ttfie r.
c. Run n ing with o ut a battery.
d. L oose o r disconnect ed terminals between t he
frame gr ound and the 8 si de o f th e se lenium
re c tifie r IC 50, C6 5, S5 0, S65 do es not u se a
frame
gro und, how eve r, the C50M, C65M us e
a
full wave rectifier and it is imp or tant tha t no
loo se n ess at th e frame exist!.
If the engi ne should be st ar ted under the above
conditio n o r if such co nd itio n s hou ld deve l op
wh ile th e engine is be ing ope rated, a high vo lt ag e
wi ll be pr o duced due to the absence of any l oad
on the co il , and thi s high voltage will cause a
l
arge amount of cu rren t to flow thro ugh the r e-
c tifi er in the r everse dire ct ion , r es ulting in th e
e
ventua l puncturing of the selenium rec t ifi e r.
There fo r e:
a. Alway s maintain al l el ec tr ica l co nnec ti ons in
the c
ir cu it in a good con diti o n.
b.
Und er no c ir c um stances sho uld the engine be
star
ted without the ba tt ery co nne cte d.
Ch ecking th e Cond iti on of the Se lenium Rec ti fi er
I 11 Use se rvi ce t es t er.
121 Test pr oced ure
a.
Se t the se l ec to r switch to "R es is tan ce X 1 00 "
b. Use 6V as a power so ur ce
c. Sho rt across the EB and 8 leads of fhe test er
and re g ulate the adjuster knob so t hat the
t
es t er indicat or n eed le is point ing to "0" on
th e "R es is tance X 1 00" scale. (Fig. 5- 39)