phase linear 400

[gene french]

got the car back...timing belt kit...some hose that broke...clamps ...hydralic fluid...and one other thing i cant read....about 180 bucks with the timing belt kit being 100 of that...that includes towing it to the shop...i asked that this be done before i took possession ..

 

[gene french]

i try very hard to maintain my equipment ..
i have discovered....if you dont schedule maintainance on your equipment....the equipment will schedule it for you....

 

[gene french]

checked with box correos ..i have been invoiced for joes shipment....monday or tuesday...
and i can wrap up!!!

 

[Gepetto]

checked with box correos ..i have been invoiced for joes shipment....monday or tuesday...
and i can wrap up!!!

The dirty underwear inspectors have completed their work?

 

[gene french]

seems so...i listed them as transistors...the invoice said transistors...so...
they were classified as batteries

welcome to costa rica!!!

 

[Gepetto]

seems so...i listed them as transistors...the invoice said transistors...so...
they were classified as batteries

welcome to costa rica!!!

Corruption at its finest

 

[gene french]

i think it is little exposure...they have never seen this kind of stuff...and have no clue what it is...
i ordered 2 hood struts so the hood dont kill you on the dodge ... its very heavy and the truck is tall...a 4x4... they were classified as 2 pieces of metal....lol

 

[gene french]

good afternoon....
well the replacement outputs came in....
before i had three rows populated and tested....
i removed all...and populated the left side with the old set
and the new set that came today i populated the right side...
i can not set the bias on the left channel....stays around 14mv
right side sets perfectly....
can anybody point me in the right direction??
fuses are good...no dc...
dcp board functioning properly...

 

[George S.]

Think Joe usually says check the voltage regulators on the control board at this point. That's why he has all the test points. Can do comparative testing from side to side. If everything is equal I'd check the bias transistor. Might be a good idea to look at those three wires first to make sure none are broken. Long day, good luck, later.

 

[gene french]

Think Joe usually says check the voltage regulators on the control board at this point. That's why he has all the test points. Can do comparative testing from side to side. If everything is equal I'd check the bias transistor. Might be a good idea to look at those three wires first to make sure none are broken. Long day, good luck, later.

thanks george...me too...long day...
bias transistors test good...
did continuity tesr through wires...
will check voltages tomorrow....
interesting find...top left emitter reststor shows open ...some test normal at .5 ohm...allowing for lead resitsance ...that is right...others give strange readings and some test normal...
all 6 on right channel test good at .5 ohm...right side is populated...left side has no transistors....
i had a bad emitter resistor on the sx1080...theu are .5 ohm...but much bigger...on the wopl they show .33 ohm...
we shall see....

 

[MusicSteve]

thanks george...me too...long day...
bias transistors test good...
did continuity tesr through wires...
will check voltages tomorrow....
interesting find...top left emitter reststor shows open ...some test normal at .5 ohm...allowing for lead resitsance ...that is right...others give strange readings and some test normal...
all 6 on right channel test good at .5 ohm...right side is populated...left side has no transistors....
i had a bad emitter resistor on the sx1080...theu are .5 ohm...but much bigger...on the wopl they show .33 ohm...
we shall see....

fill me in? as I recall you blow 3-outputs? Was their any burn marks on the Transistors? or silicone pads or chasey? and did you mark were they came out of ? and is that related to were the open resistors you found? I think your on the right track you could have blow some of the resistors when the Transistors blow, You might want to look at that area out (most of the time the resistors will have a crack in them and Open up , like you found out) if open you will have to replace them.
Also look for open traces and other components in that area (or the whole left back channel ) I would start their and test the Bias Transistor also Good Luck

 

[gene french]

fill me in? as I recall you blow 3-outputs? Was their any burn marks on the Transistors? or silicone pads or chasey? and did you mark were they came out of ? and is that related to were the open resistors you found? I think your on the right track you could have blow some of the resistors when the Transistors blow, You might want to look at that area out (most of the time the resistors will have a crack in them and Open up , like you found out) if open you will have to replace them.
Also look for open traces and other components in that area (or the whole left back channel ) I would start their and test the Bias Transistor also Good Luck

four actually...the open resistor is within a half inch of where the solder touched the pin on the affected output transistor...nothing shows burned or cracked...just an OL reading on dvm across that top emitter resistor...and of course i have none of those...

 

[MusicSteve]

four actually...the open resistor is within a half inch of where the solder touched the pin on the affected output transistor...nothing shows burned or cracked...just an OL reading on dvm across that top emitter resistor...and of course i have none of those...

I think that's good news, Hopefully nothing up stream is damaged.

 

[George S.]

four actually...the open resistor is within a half inch of where the solder touched the pin on the affected output transistor...nothing shows burned or cracked...just an OL reading on dvm across that top emitter resistor...and of course i have none of those...

You found it all most probably, if comparative testing shows the control board voltages are correct. Thanks to Mark L. for introducing the term "comparative testing" a good while back.

 

[gene french]

well not quite all....
voltages check good...+-15v and rail voltage...meters light....etc...
fuses good...on chassis and on back planes...
right channel components check good...populated and bias set....
left channel....here we go...
with one leg removed from the back plane....
1 of the 6 emitter resistors is open
4 of the 6 emitter resistors are shortes...measuring in the M ohms
2 measure .5 ohm...normal measurement....as per right side too...
r1 on the backplane shows 600k ohms...shorted...
r3 had a small black spot under it...did not see it at first...measures 212k...also shorted....and it left the burn spot on the board....which came right off...
they are supposed to 1 ohm ....
both diodes checked good....
all other resistors checked ok...
so....
i guess i need to order some stuff...
crap....

 

[gene french]

if anyone knows what more i need to check....please speak now...before i order my stuff....
good morning phoenix

 

[WOPL Sniffer]

Anything measuring more than an ohm or two is not shorted. 212K ohms is DEFINITLY not shorted. Maybe I misunderstood what you were saying. Shorted is like putting your meter leads together.

 

[gene french]

ok....then it is 212,000 times over the specified resistance....
better???
lol

 

[George S.]

Gene, while your at it consider getting a good Fluke meter and installing all the upgrades to the amp like feet and Phoenix Contacts on the backplanes. The Phoenix Contact part#s are at the end of the control board BOM PDF. Just saying, consider it. May as well at this point.
If you get a meter ask the guys for recommended model #s. My Flukes are older US Govt. NSN models made for general use, model# 77 B/N. Better are available.

 

[George S.]

Also, is your relay still clicking and the contacts are clearly not welded? Additional fuses, bias transistors. No visible swelling or leakage of any electrolytic caps?