Voltage regulator help

[Darkman]

I have a voltage regulator unit of a trx300 that a friend asked me to test. I have a problem that there is no diagram on the thing and it has 6 pins. Does anyone know what all the pins are for or maybe have a diagram for the wiring of this bike or similar. The model number of the regulator is sh548-12 if that is any help.

[bungbung]

Yellow, yellow, yellow = ac input
Red = Batt +
Black = Batt -
Green = Lighting/accessories negative (goes low when engine is running)


TRX diagram: http://img153.imageshack.us/img153/1401/350wireaa5.jpg

[Wired1]

Yellow, yellow, yellow = ac input
Red = Batt +
Black = Batt -
Green = Lighting/accessories negative (goes low when engine is running)
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So tell us about this green bugger. Some of the bikes I've had have this extra wire, maybe brown on yamahas but the same extra wire.

[XRKID]

On most R/R's theres 5-6 wires. 1-3 yellow or white ones which are A/C inputs.
1 Black Or Green Which are connected to negative on battery. One Red or blue which is connected to positive on battery. And usually one Brown or light green or stripped wire which is a sender unit wire which needs to be connected to a positive (live) voltage, thus sends a voltage to the R/R to turn on the regulator and regulate the right voltage. If the R/R doesnt have this wire its all good.

[bungbung]

Wired1 has it for this case,

Looking at the TRX wiring diagram, do you have three yellow, a red, a green and a brown? You'll see the brown is indeed a sense wire, when the ignition switch connects the battery positive to the top of the fuses, the sense wire is livened.

To avoid confusion, I'll post a diagram of the other kind of wiring in a new thread.

[psyguy]

i'm having issues with this same RR on my bike (model sh548-12)
but it is not an OEM part for my bike, so the service manual doesnt help...

i'm interested in how to test this RR (i mean to test it independently, not just through measuring the charging voltage at the battery)

any help?


I have a voltage regulator unit of a trx300 that a friend asked me to test. I have a problem that there is no diagram on the thing and it has 6 pins. Does anyone know what all the pins are for or maybe have a diagram for the wiring of this bike or similar. The model number of the regulator is sh548-12 if that is any help.

[psyguy]

Yellow, yellow, yellow = ac input
Red = Batt +
Black = Batt -
Green = Lighting/accessories negative (goes low when engine is running)


TRX diagram: http://img153.imageshack.us/img153/1401/350wireaa5.jpg

would the order of the 3 wires on that diagram correspond to the actual pins on the RR unit?

the top 3 pins on the RR connector are for the stator input, i know that much, but not sure how to determine what exactly is the order of the 3 bottom pins

[retro asian]

http://www.sgr-it.com/download/pdf/16e_volani_alternatori.pdf

Equivalent diagram is in there, but you have to be able to translate Italian....

[psyguy]

retro asian, you da man! grazzie!

id still like to know how to test the unit on its own

anyone?

[xwhatsit]

retro asian, you da man! grazzie!

id still like to know how to test the unit on its own

anyone?
I'm pretty sure that's the same regulator (SH548-12) as what is OEM on CB250RSs. Give me half an hour and I'll scan the relevant page out of the Haynes manual.

EDIT: Shit, it's not, it's a SH232-12. Sorry.

[psyguy]

EDIT: Shit, it's not, it's a SH232-12. Sorry.

is that a 6-pin regulator?
if it is, the chances are the testing procedure might be the same
thanks

[xwhatsit]

Yep. Probably very similar.

Anyway the tests are simplistic, probably because earlier in the manual it talks about `specialised equipment, a multimeter, which no home mechanic can afford' :laugh:

3 Regulator/rectifier: testing
1. This component is a combined solid state unit. If damage occurs, no repair is possible; the complete assembly must be renewed. The performance of the regulator can only be tested using special equipment. However, a continuity check may be carried out on the unit as a whole, giving some indication as to its condition.

2. Disconnect the leads from the regulator/rectifier unit at the block connectors. Place the ohmmeter positive probe on the green lead and check the resistance between it and each yellow lead. The correct reading for each test is 5 - 40 ohms.

3. Repeat this test with the ohmmeter probes transposed, i.e. with the negative probe on the common test lead. The resistance reading must be 2000 ohms or more. If any reading is incorrect, the complete regulator/rectifier unit must be renewed, after having its condition confirmed by a Honda Service Agent.



It's interesting that when I tested both of my regufiers, both returned around 500 ohms, not 5 - 40 ohms.

[psyguy]

cheers

i'll test the rr tomorrow