 |
| Original OEM full wave regulator of a Branded Motorcycle Model |
Full wave regulator is a REGULATOR on some motorcycle that offers better charging capabilities on their electrical system when it comes to additional accessories installed such as led bars and flood lights. Most motorcycle to where you can turn ON the headlights even if the engine is OFF is considered a FULL WAVE system, that unlike on HALF wave, you have to run the engine and intensity varies to the revolution of the engine, the latter is fixed intensity due to their headlight connected directly to the battery.In this article, again for educational purposes only. We go inside and exposed what was inside noted that this one is an expensive one compared to my other post of full wave regulator sold as an aftermarket. The one being posted here is an OEm, an Original part of a widely known motorcycle that continue to fail and fail due to many reason that I will state later at the end of the posting.
LET US START DIGGING!!!
Before tearing it apart, there is no active description that this is a FULL WAVE TYPE of regulator.since this item uses 4 pins or 4 terminal pins like those on HALF WAVE..many thought by just using multimeter alone will indicate a half or full type, but I can;t provide any. I just relied on how they are configured on a motorcycle.
Sometimes an OEM uses rubberized resin to protect internal components from water and vibration. Aftermarket ones uses HARD epoxy resin. That is my way or trying to Distinguish the two.
So let the tear up begin, Again shown on the left uses rubberized resin, so it will be easily scrape using bamboo stick..metal pointed object when doing the scraping is not advisable, It may pop components inside.
Patience is needed if you want to reuse the item or repair it. The process is straight forward. I am opening the item since this unit is already not clamping output voltage and outputting almost 18v and more. Normal working voltage should be 14.4 - 14.6 Volts.
As the slow scraping process you will see some components gets visible.
Continuing will expose more of it. This will allow you to visually inspect where the PCB of the board is located and as the process of scraping is finished without hurting small components, the entire internal components will be exposed. By following this Aftermarket FULL WAVE regulator schematic, They both function the same.
Almost same schematic but different part number use, but the uses is the same. Uses SCR , Bridge rectifier, resistors, capacitors and transistors in SMD type to minimize space and size of the whole circuit.
The board which is the voltage monitoring circuit must be remove. carefully desolder all pins connected to the PCB, pull it up. Nice.
What was left on the housing was the defective SCR and the leaky BRIDGE RECTIFIER..They are the ones that has a DEFECT that allowing the 18v ouput. The SCR was already shorted, and the BRIDGE RECTIFIER positive and negative pins is leaky and should and must not have any resistance due to the diode configuration of 4 pieces.
Close up view of the voltage monitoring circuit of this regulator, Seems legit. Tracing the circuit gives me the same as to Full wave regulator schematic post.
No unusual special additional circuit. All SMD marking code are intact and can be replicated.
There is no special means of identifying whether the regulator is ok or not by using multimeter, since what you will just be able to measure is are the diodes that was configured on a bridge type. SCR test by multimeter without tearing it apart will give you nothing.
This method i did confirmed..SCR was indeed defective by pin test resistance measurement.
What was left on the housing was the defective SCR and the leaky BRIDGE RECTIFIER..They are the ones that has a DEFECT that allowing the 18v ouput. The SCR was already shorted, and the BRIDGE RECTIFIER positive and negative pins is leaky and should and must not have any resistance due to the diode configuration of 4 pieces.
Close up view of the voltage monitoring circuit of this regulator, Seems legit. Tracing the circuit gives me the same as to Full wave regulator schematic post.
There is no special means of identifying whether the regulator is ok or not by using multimeter, since what you will just be able to measure is are the diodes that was configured on a bridge type. SCR test by multimeter without tearing it apart will give you nothing.
So much inspired with the documents you have shared. Thanks a lot, this was much useful and handy. Battery is the only source that assists to prevent us from the power demanding time, so choice of your battery should give at least minimum power consumption so better to buy your batteries & inverters from the battery authorized dealers. Inverter Battery dealers in Chennai
ReplyDeleteHI! Could you please explain how the SCR's are being connected with those copper strips(I believe) and why it is not encorporated on the board itself.
ReplyDelete