3.45V alt on v7? - Page 2

Headly · #16 19-03-2003, 15:24

Actually I wasn't thinking of a dioade problem. What problem are you speaking of? I have Messiah v1.22 that I got off, well you should know who.

ottoman · #17 19-03-2003, 15:34

Cool.... I was thinkin of diode problem.

Did u try monitoring voltage across messiah 2 3.45v and ground?

Headly · #18 19-03-2003, 15:58

No I have not tried to check the voltage yet. I am currently out of town. When I get back it is the first thing I am going to do. The problem with the diode hat you are speaking of. Is it the one adressed by the PCB fix?

Headly · #19 19-03-2003, 20:31

Checked for power and power was OK. Uninstalled the chip for the third time, and now I am just thinking. Checked the BIOS legs for bridges and balls again. Its all ok. The only other thing that I can think of, if you guys think that it is at all possible, is that I was reading another post on ps2newz and one guy had a similar problem on a version 4. It was suggested to him to check the clk connection. He posted that his problem was solved but never posted his solution. Does anybody have any clue what is going on here? I sure don't. I am losing my mind. Almost ready to go buy another ps2 and try and see if that one works.

ottoman · #20 20-03-2003, 04:18

R u using a single wire for the clock wire or r u using the 'twisted pair' method?

This seems kinda odd though. Clock wire connection would have to be non existent for chip to be dead.

Usually the clock wire just suffers from EMC problems and needs a close by ground plane to cut town crosstalk voltage.

well, if the juice is there then it ain't ur problem, scex and clock wires r the next natural suspects.

dust2dust · #21 20-03-2003, 06:52

Quote:

Originally posted by ottoman
I found the odd problem with using AWG30 kynar wire for the 3.45 connection ( thread marked 'suspect Messiah 2' being one of them.

Occasionally I reassemble and find that the messiah 2 seems 2 be dead.

Have now started to use thin multi strand wire for the 3.45v connection and ground as this is easy to tin and still small enough to get on the 3.45v solder point and haven't had a problem since. Also use stacks of liquid flux on point and adjust solder Iron up another 25 degrees if having trouble getting wire to take.

As for stripping wire, used to use my old chunky soldering iron to melt the insulation back but now use thermal strippers. super quick and perfect every time.

Regards.........

agrred u should use 24swg multicore for the power
but headley was saying he had problems soldering it to the resistor(kept falling off)

this why i recomended 30 awg kynar as it will solder to the resistor without any probs

on a v7 30awg kynar shouldnt caus a problem
on older ps2 yes u need 24swg for sure

dust2dust · #22 20-03-2003, 06:56

do ps1 backups boot?

if u sure your power is good
clock is to correct point(as otto says sound problems due to bad clock but not nothing at all)

if nothing boots backups ps2 and ps1 then i say check double check u soldered to the correct bios points as the messiah2 wont intiate unless the bios connections are correct

Headly · #23 20-03-2003, 07:29

I cannot get any backups to boot at all. I have gotten very used to the sounds my PS2 makes when booting backups and it is missing to clicks off the end.I always install the clock wire as a twisted pair, why not do things right the first time. Seemed like a very good connection everytime. I usually check every connection by giving it a good tug. If I can't pull hard of nearly pick the mobo off the counter with it I resolder it. I am sure that the bios points are to the correct place, and I have tried two SCex points. I found a power point that was on a pad so I am sure I have a good connection there, I am now using the 24awg. I really have no clue. I have done this install, on this ps2, three times already. Each time I have been very careful, cut new wires, label them all, go throughthe install guide point by point. Only other thing I am going to try next time is the alternate clock point. This is about the only wire that could cause the problem that I have not tried an alternate for.

Thanks for the help. I'll keep you all posted.

dust2dust · #24 20-03-2003, 08:03

pad for power on v7 ,u got a picture this is most likely your problem, no power

my reason for this is if theres a good pad to solder the power to i think it would be in the diagram it would make install alot easier
24swg to 3.45 isnt the easiest of jobs

dust2dust · #25 20-03-2003, 08:20

solder your power to the origanal 3.45 in the diagram,u wont be able to tug it with thick wire it will fall off
to test place your meter on the alternat power piont in he official diagram,place other on the m2 power pad u soon see if u got a good connection or not from your meter without having to tug it ,then glue it in position
also make sure scex is to diagram piont aswell(is ps1 boot we know m2 has power)
to me your m2 has no power,either power or ground ,or bios as m2 needs this to initiate itself

Headly · #26 20-03-2003, 08:26

For the pic of the power pad go back to kooldraco's post the the previous page. It has power, I checked it myself with the volt meter 3.473 volts. As I stated earlier i have tried the two power points listwed in the install several time. I had even moved the ground to the outer rim of the mobo to make sure it was a good connection.Got some things to do today, going to try another install tonight. This makes number four, for this machine.

dust2dust · #27 20-03-2003, 08:42

i stand corrected pad measures good,

u have no other messiah2 u could swap it with to test,if chip is at fault we replace it if its one of ours which i guess it is

Headly · #28 20-03-2003, 08:44

I have already tried a second chip, no luck. I am really puzzled by this one.

dust2dust · #29 20-03-2003, 08:45

just a quick thought sorry if u answered this already
gho22 i seen u post
bios 080 or 090(hehe i read through thread again bios is located on top of the chip which u solder mnop qtuvrw points 2)
if its 090 u got a v8 u need 1.30 firmware for v8

although im sure 1.22a would boot cdr and fail on dvdr only

Headly · #30 20-03-2003, 09:19

I take this to mean that the bios is 070, but not sure so here's everytning.

S023933
MX23L4800YC-10G
2002 SCEI
D 119 050 M48
B 10 070
2G398800

That is everything written on the bios chip. It had occured to me to check out the v8 possibility but I got the PS2 in the US about 2 months ago, so it didn't seem likely, but I am from a small town where weird things happen.