Fan regulator mainboard/PCB to replace SAAB 9-3 1998-2003 faulty regulator at reasonnable costs. #36 on diagram below
Due to high heating functioning tempreature, main MOSFET on board ends in failing. Board/soldering pads may be damaged as well as components.
This is made to replace PCB and its components, you need to take back from original SAAB part #5045158 :
- wiring and connector
- housing and screws
- vertical plate on PCB
Build and use this at your own risks.
High intensity involved that may lead to fire if not properly build
Check twice there are no shortcuts or badly soldered components.
Inital intention was to replace faulty part but after a close magnified look that showed the damage, I ended to make a complete 1:1 copy of original board layout under Eagle CAD.
Schematic & board design files are available up here.
Ordering PCB is doable at OSHPark (note that they sell boards by sets of 3 minimum)
Here is a BOM to order parts - I ordered at Mouser's, that's why I left their ref in table below
(note that some parts are SMD - be sure to have ability and tools to solder them)
| N° Mouser : | N° de fab. : | Desc. : | Client ref. | Qty |
|---|---|---|---|---|
| 844-IRFP054PBF | IRFP054PBF | MOSFET TO247 N CHANNEL 60V | VT1 | 1 |
| 512-BC547B | BC547B | BJT NPN Epitaxial Silicon Transistor | VT2 | 1 |
| 603-MF0204FTE52-3K16 | MF0204FTE52-3K16 | Through hole 3.16Kohms 1% 1/8watt | R13 | 1 |
| 594-5063JD10K50F | MBA02040C1052FC100 | Through hole 10.5Kohms 1% 1/8watt body size | R11 | 1 |
| 71-CMF5078K700FHEB | CMF5078K700FHEB | Through hole 1/4watt 78.7Kohms 1% | R14 | 1 |
| 71-MBA02040C2200FCT0 | MBA02040C2200FCT00 | Through hole 1/4watt 220ohm 1% 50ppm | R8-9 | 2 |
| 594-5063JD6K200FT | MBA02040C6201FRP00 | Through hole 6.2Kohms 1% 1/8watt body size | R3,R7 | 2 |
| 594-5063JD2K200F5 | MBA02040C2201FCT00 | Through hole 2.2Kohms 1% 1/8watt body size | R1-2 | 2 |
| 594-5063JD1K000FT | MBA02040C1001FRP00 | Through hole 1Kohms 1% 1/8watt body size | R15 | 1 |
| 594-5063JD10K1%TR | MBA02040C1002FRP00 | Through hole 10Kohms 1% 1/8watt body size | R4,R12 | 2 |
| 594-5063JD100K0F5 | MBA02040C1003FCT00 | Through hole 100Kohms 1% 1/8watt body size | R5 | 1 |
| 595-LM2904BTQDRQ1 | LM2904BTQDRQ1 | Amplis-Op Automotive-grade du al 36-V 1.2-MHz op | U1 | 1 |
| 594-5063JD18K70F | MBA02040C1872FC100 | Through hole 18.7Kohms 1% 1/8watt body size | R6 | 1 |
| 603-AC0805JNPO9BN181 | AC0805JRNPO9BN181 | MLCC - CMS 50 V 180pF C0G 0805 5% | C4, C6-11 | 7 |
| 810-FA14C0G2A103JNU6 | FA14C0G2A103JNU06 | Through hole MLCC 100V 0.01uF C0G 5% RAD LS:2.5mm | C1 | 1 |
| 810-FA28X8R1H104KRU6 | FA28X8R1H104KRU06 | Through hole MLCC 50V 0.1uF X8R 10% RAD LS:5mm | C2-3,C5 | 3 |
| 621-1N4007 | 1N4007-T | Diode Vr/1000V Io/1A T/R | D1 | 1 |
Have a look at the brand new board
Here's the new board soldered and ready to mount in car and enjoy a working fan
