Function of r egulator

Wh ile the engine r/m i n is l ow a nd the generated voltage of the AC generator is l ower tha n the adjusted voltage of regu l ator, the regu lator d oes not f u nction. H owever, the generated cu rrent cha rges the battery d i rectl y at th is ti me.

Ignition switch

AC generator

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When the engi ne r/m i n becomes h igher, the generated vol tage of the AC generator also becomes h igher a nd the vol tage between the battery termi na ls becomes h igh accord i ngl y. W hen it reaches the adjusted vol tage of the l.C. (I ntegrated Ci rcu it) and it is tu rned " ON ", a signa l wi ll be sent to the SC R (Thyristor) gate probe and the SC R wi ll be tu rned " ON ".

Then, the SC R becomes cond uctive i n the d i rection from poi nt ® to poi nt @. At this ti me, the cu rrent

generated f rom the AC generator gets th rough the SC R without cha rgi ng the battery and retu rns to AC generator again. At the end of th is state, since the AC cu rrent generated from AC generator f l ows to poi nt

@, the reverse cu rrent tends to f low to SC R. Then, the ci rcu it of SC R tu rns to the O F F mode a nd begi ns to cha rge the battery aga i n. Th us these repetiti ons ma i nta i n cha rgi ng vol tage and cu rrent to the battery consta nt a nd protect it from overcha rgi ng.

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CH A R G I N G OUTPUT CH ECK

• Remove the seat.

• Sta rt the engi ne a nd keep i t ru n n i ng at 5 000 r/mi n wi th l i ght­ i ng switch tu rned O N a nd d i m mer switch tu rned H I positi on.

• Usi ng the pocket tester, measu re the DC vol tage between the battery term i na ls, EB a nd 8.

I f the tester reads u nder 13.5V or over 15.5V, check the AC generator no-l oad performa nce a nd regu l ator/rectifier.

NOTE: Regulator/

When making this test, be sure that the battery is full y-charged Rectif i..e..r_---.

lg. switch

condition. 1-----....---

STD chargi ng output: 13.5 - 15.5V (DC) at 5 000 r/mi n 09900-25002: Pocket tester

AC G E N E R ATOR NO-LOAD P E R FOR MANC E

• R emove the seat and lef t ai r cleaner side cover.

• Discon nect t he AC genera tor lead wi re cou pler.

• Sta rt the engi ne a nd keep i t ru n n i ng at 5 000 r/m i n.

• Usi ng the pocket tester, measu re the AC vol tage between the th ree l ead wi res.

I f the tester reads u nder the specif ied vol tage, the AC genera­ tor is fau l ty.

STD no-load performa nce: More than 70V (AC) at 5000 r/mi n (When engi ne cold.)

09900-25002: Pocket tester

AC G E N ERATOR CONTI N UITY CH ECK

• Usi ng the pocket tester, check the conti n u ity between the th ree lead wi res.

Check that there is no conti n u ity between the lead wi res a nd g rou nd.

09900-25002: Pocket tester

NOTE:

When making above test, it is not necessary to remove the AC generator.

Y: Yellow

Y: Yellow

• Remove the seat a nd lef t a i r clea ner side cover.

• D iscon nect the AC generator lead wi re cou pler.

• Usi ng the pocket tester (x 1 kn ra nge), measu re the resist­ a nce between the lead wi res i n the fol l owi ng ta ble.

I f the resista nce checked is i ncorrect, repl ace the regu lator/ rectif ier.

09900-25002: Pocket tester

U n it: Approx. kn

a.>

Y: Yel low, R: R ed, B/W: B lack with W h ite tracer, oo: I nfi n ity

NOTE:

As transistors, capacitors, Zener diodes, etc. are used inside this regulator/recti fier, the resistance values will dif fer when an ohmmeter other than the SUZU K I pocket tester is used.