Dreamcast Controller Port1 not working

A friend of mine has got a problem with one of his Dreamcasts where the P1 port doesn't work at all, others work fine. Can anyone steer us in the right direction, I'm hopeless but willing to learn.

I'd like to know what to look for when I take it apart
Thank you!

 

strip it down and check the connections on the controller board and the ribbon cable, it may just be a resistor has went bad this can happen

heres some results from le google
https://www.google.co.uk/search?cli...-8&gl=uk&redir_esc=&ei=LYWdUP_KMqbC0QWU3oCgDg

 

Check for bad solder joints on port one.

 

Thanks for your help guys!
I guess I should've googled before I asked :$

 

Just want to report back that I fixed the problem by replacing the F1 resistor

 

Resistors! What a pain! Glad to hear it worked out though. Another Dreamcast lives on :encouragement:

 

Fuse, not resistor

 

Another happy ending

 

fusible resistor?

 

resistable fuse?

resistance is futile!

 

Heh, I replaced the F1 fuse with two 10ohm resistors in parallel

Long live all Dreamcasts

 

Great job,
At this point it's better if you do a bridge with a wire...
Fuses must be replaced with fuses!

 

Most of the guides I've come across say replace with one (fuse) or the other (res) so I figured I'll go with the easiest option.
Is there a long term damage? Should I not use it until it gets replaced with the right component?

 

Because most people don't know what they doing,
A fuse MUST be reaplaced with another fuse with the same parameters.
If the controller have a damage cable and the line short, and you don't have the fuse that blows immediatly and protect the other components, but you have a commen resistor (or in this case a pair of resistor brrrr) the final result is a ctastorfic damage.
Many people who want to look smart and wise gives ridiculous advices, such as bridge the main fuses with wires or other components. Bridge must saty only on river, no?

Honestly i don't knpw the dreamcast motherboard, but F1 mark at 99% indicates a fuse

 

Thanks, I guess it only makes sense to replace a fuse with fuse. Still learning :$

 

Its because they look like a resistor (when infact its a picofuse).

 

Signed up recently to make a thread about the mysterious F1 "resistor", this thread seems like a good place to address it though.

I've been trying to get to the bottom of the dead port mystery and cannot for the life of me find reliable information online. From what I gather, the F1 is indeed a fusible resistor and must be replaced in kind for a proper fix (confirmed above). I don't understand the rating of F1, however. It appears to be coded Orange/White/Grey/Silver/Green which would indicate 3.98 ohms with a +/- 0.5% tolerance. (Though to my eye, the grey/silver bands look identical.) My multimeter, however, shows ~0.8 ohms. What am I missing? The R1 resistor bands match my reading (13 ohms).

Re: "Picofuse" - This term threw me off for awhile. Is it a resistor, fusible resistor, or picofuse? I get the impression that the term "PICO" denotes a brand name owned by Littelfuse and not a unique component.

 

defective resistance causes the Judgment of the 4 ports handle!

but Only one joystick port down =
syndrome is the console placed on the ground!

at one time or another someone walked on the sheet exceeding the console or on the wire very close to the plug, it broke the welds of the joystick port!


there is just a recharge welding this port


sorry for the very rough google translation, I give you the French version, in case you have a better translator!


la resistance defectueuse entraine l'arrét des 4 ports manette !
mais 1 seul port manette en panne =
c'est syndrome de la console posée au sol !
a un moment ou un autre quelqu'un a marché sur la fiche depassant de la console , ou bien sur le fil tres pres de la fiche , cela a cassé les soudures de ce port manette !
il y a juste a recharger les soudure de ce port
desolé pour la traduction google tres approximative , je vous donne la version francaise , au cas ou vous auriez un meilleur traducteur !

 

Its a fuse, the bands are for that brand to give the rating, blow speed, etc.

As you saw - it has little to no resistance and isnt a resistor.

 

Yeah, I've seen it described as a 390mA fuse but my multimeter didn't pick up anything when I checked for mA. Can fuses not be measured in the same manner as resistors?