My rear lamp/brake lamp appears to have failed, it is not damaged just will not work. We have no dealer here is mit possible to repair them?
Thanks
peter
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Take a look at this thread which should help.
Alan
TL;DR version - replace Q1, a 2n7002 Mosfet that will have a hole burnt through the middle of it.
Its a SMD component, how good are you with a soldering iron (you should be able to get a TV repair place to do it for a $20 or so if you order the part from Farnell or mouser.
Thanks guys. Is it Like this?
Product Information:
FAIRCHILD SEMICONDUCTOR - 2N7002 - Mosfet N Sot-23
MOSFET, N, SOT-23
Continuous Drain Current Id: 115mA
Drain Source Voltage Vds: 60V
MSL: MSL 1 - Unlimited
No. of Pins: 3
On Resistance Rds(on): 5ohm
Operating Temperature Max: 150C
Operating Temperature Min: -55C
Power Dissipation Pd: 200mW
Rds(on) Test Voltage Vgs: 10V
SVHC: No SVHC (20-Jun-2013)
Threshold Voltage Vgs Typ: 2.1V
Transistor Case Style: SOT-23
Transistor Polarity: N Channel
Current Id Max: 280mA
Current Temperature: 25C
External Depth: 2.5mm
External Length / Height: 1.12mm
External Width: 3.05mm
Full Power Rating Temperature: 25C
No. of Transistors: 1
On State Resistance @ Vgs = 4.5V: 5.3ohm
On State resistance @ Vgs = 10V: 5ohm
Operating Temperature Range: -55C to +150C
Pulse Current Idm: 800mA
SMD Marking: 702
Tape Width: 8mm
Voltage Vds Typ: 60V
Voltage Vgs Max: 2.1V
Voltage Vgs Rds on Measurement: 10V
Voltage Vgs th Max: 2.5V
There is a blob on Q1 one which I assume is the burn mark!!
Cheers
peter
Yeah that's it. Mine burnt a bubble in it as well, when scratched off it was just charred.
5 minute job with a soldering iron to fix.
Makes it hard to identify the component value though :)
I was looking for equivalents that had a lower on resistance and higher current handling capability, but never got around to it. Lower on resistance is easy, and would really reduce the dissipation in the device.
Got 20 of these Firchild 2N 7002 MOSFETS for few Euro including postage and my local mobile phone shop will solder one in!! Definitely going modify the lamp unit to make the lens Quick release, for the next time!!
This thread has been addded to the http://visforvoltage.org/forum/6737-vectrix-collaborative-handbook , please stay on topic.
Mik
This information may be used entirely at your own risk.
There is always a way if there is no other way!
OK, so got the strip of 10 2n7002 mofsets and mobile phone shop soldered in a new one! Refitted everything and now have a rear lamp but no brake lamp. The constant rear lamp does seem bright!! any suggestions?
OK, so got the strip of 10 2n7002 mofsets and mobile phone shop soldered in a new one! Refitted everything and now have a rear lamp but no brake lamp. The constant rear lamp does seem bright!! any suggestions?