Honda C65 - Horn, Rectifier, and Speedometer Service

5. 7 0 SELENIUM RECTIF I ER
81
_ =-=- = _ e ectrom ag net whic h causes a st eel
- ::·oi e and produce sound. Whe n
_ =-=·;: ·: ed , th e stee l core is drawn in , at
·-= -~ --= ::·e aks the con t act which opens t he
:- : ·=- · ::~d causes deenergiz ing of t he coi l.
--= :-ee cor e is conn ected to the r esonator plate
:::-:: :::.:es i. to vib rate , producing the so· und.
--e ·roubl e symptoms of the ho rn are, no sound
::·:::: ced, w eak sound, poor quality of t one . Perform
··e · . spect ion in the fol l owing manner.
If the h orn does n ot produce any so und, first
check
to see if the fuse is bl own . (Fig. 5-34)
2 Wh en check ing any defect c ondition, co nnect the
ho rn directly to the b atter y w ith seperate lea ds.
o.
Pro per so unding w ill indi cate a defective h orn
switc h.
b. When the sound is weak, adjust the sc r ew at
the back of the horn. (Fig. 5- 35)
Turn the s cre w to the right to de crease the
sound.
Tut n the screw to the l eft to inc rea se the sound.
31 Ho rn pr od uces a sound of poor quali ty.
Remove the ho rn and check
for poor poi nt con -
tacts, rem ove the wir es at the terminals and
measure the r es istance of the co il. The resistance
sho
uld be appr ox ima tely 1 fl.
Battery Installation
I 1 I W h en installing a fully charged batte r y, clean
the exterior th o rou gh ly w ith water.
1 21 Apply a coa ti ng of grease o r vasel ine a ft er
co nnec ting th e leads to the ba tt ery t er minals to
pr event corrosi on.
1 31 Make su re that the EB and e c onnecti o ns are
pr o perly made .
5.1 0 SELENIUM RECTIFIER
The function of th e r ec tifi er is to conver t A.C.
to D.C. and is u se d o n all A.C. generator o r A.C.
ge ne rating co i l.
It u til izes the phenomena of all ow ing th e cu rr ent
to now in one dir ec ti on and permitting only a small
am
ount o f c urr ent to now in the r eve rse direction .
The
construc t ion of the rectifie r is sho wn in Fig. 5 .3 6
w
ith a moisture -pr oo f pa int appl ied. (Fig. 5- 36)
T he el ec tr ode al loy side, co mpar ed to the op -
pos it e side having a st eel plate, is rai se d appro -
x imately 1 mm 10.040 in ch ) making it easy to r ecog ni ze d
even w ith the su rf ace pa int ed . The C50M, C65M are
eq uipp ed with a full wave rectifier, whereas , th e C50,
C65, S5 0, S65 ore eq uip ped wit h half wove re c ti fiers.
'
adjusting
Figure 5- 35. Ad justi ng the hor n
Di el ectric coat ing
r
~r~ z~z~?~2~?:~~~~ z ~ z ~ ?: ~>~~7.~ .. ~ _, ~ ' ~ ' ~~~ ~ E ;~~ ~ :~i~ ~c t rode
S tee I plate
r
ormal lira: · :·: : ea:~ · c resistivity
Re ;rsairc:: • · : - ='" e.ec ·c resist ivi ty
Fi gure 5- 36. Selenium rectifier construction diagram