utorok 11. júna 2013

seat regulator repair

cold solder joints on this diod
reseolder this joint
I also broke some some parts, so I need to make "new" one, this piece of metal act like switch "extender" which turn whole reulation off when regulator wheel is turned to 0

ugly fix .... FYI: switch is this one: OMRON d3c 1220(or 1210? that one which is not shorted when pushed down) http://sk.farnell.com/omron-electronic-components/d3c1220/microswitch-non-shorting-40gf/dp/2213940?Ntt=OMRON+d3c+1220

which shorted, disconected from 12V

powed on

heatsink need to by mod to avoid short to ground from that upper ugly hack with copper wire

main reg. mosfet BUK7518 (http://alltransistors.com/mosfet/transistor.php?transistor=1447)

BUK7518-55 MOSFET transistor

Type Designator: BUK7518-55
Type of BUK7518-55 transistor: MOSFET
Type of control channel: N -Channel
Maximum power dissipation (Pd), W: 125
Maximum drain-source voltage |Uds|, V: 55V
Maximum gate-source voltage |Ugs|, V:
Maximum drain current |Id|, A: 25
Maximum junction temperature (Tj), °C: 150
Rise Time of BUK7518-55 transistor (tr), nS:
Drain-source Capacitance (Cd), pF:
Maximum drain-source on-state resistance (Rds), Ohm: 0.018
Package: SOT78

25A is probably ok for add another heater to backrest of front seat :) space for custom seat :)

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