JBL stage micro, no sound?

[gilly1984]

As title guys, fixing this to make some cash.

It powers on but i get no audio.

I have tested for continuity on the speaker terminals and both + and - are grounded??

Any idea where to start. Pics attached. (Better this time Retiredcaps)

[selldoor]

Re: JBL stage micro, no sound?

Photos are fairly good but a bit too much flash.
Have you tested the fuse? - at least I think its a fuse looks like an F just before its obliterated by the flash.
Also looks like a voltage regulator at U6 can you post the part number and try to locate a datasheet.
On the pic of the bottom the soldering on the pins (right hand side bottom and top) doesnt look great - can you check its ok.

[gilly1984]

Re: JBL stage micro, no sound?

Photos are fairly good but a bit too much flash.
Have you tested the fuse? - at least I think its a fuse looks like an F just before its obliterated by the flash.
Also looks like a voltage regulator at U6 can you post the part number and try to locate a datasheet.
On the pic of the bottom the soldering on the pins (right hand side bottom and top) doesnt look great - can you check its ok.

Checked the fuse and its fine, although no voltage on it? Also the bad looking solders are fine, i have scraped around them with the end of my dmm thats why they look poor but make great connection.

U6 has this number on it 33ys932 but the only result is a site that can harm your computer, it also has 5209 on it.

Thanks selldoor

[retiredcaps]

Re: JBL stage micro, no sound?

As title guys, fixing this to make some cash.

Where is our cut?

Pics attached. (Better this time Retiredcaps)

Photo quality and how you upload it matters if you are going to be a regular here.

[retiredcaps]

Re: JBL stage micro, no sound?

Checked the fuse and its fine, although no voltage on it?

Something is not right with your fuse voltage if you say there is power, but no audio.

Are you measuring AC or DC?

I can't tell, but is this JBL using an external power adapter?

U6 has this number on it 33ys932 but the only result is a site that can harm your computer, it also has 5209 on it.

It is likely a 3.3V regulator from the part number.

1) Set your multimeter (if manual range) to 20V DC.

2) Put your black probe on a ground screw. Leave it there the entire time. This is your ground.

3) Put your red probe on each of the pins including, but ignore the "fat" tab. The fat tab is "up" or "north". Number the pins left to right.

4) You should have 3 readings per regulator.

5) Report them like so.

pin 1 = 0.0
pin 2 = 3.3
pin 3 = 5.0

[gilly1984]

Re: JBL stage micro, no sound?

Where is our cut?

I will donate if i make enough lol.

I will take it apart again tonight/tomoz and get them voltages.

[gilly1984]

Re: JBL stage micro, no sound?

Something is not right with your fuse voltage if you say there is power, but no audio.

Are you measuring AC or DC?

I can't tell, but is this JBL using an external power adapter?



It is likely a 3.3V regulator from the part number.

1) Set your multimeter (if manual range) to 20V DC.

2) Put your black probe on a ground screw. Leave it there the entire time. This is your ground.

3) Put your red probe on each of the pins including, but ignore the "fat" tab. The fat tab is "up" or "north". Number the pins left to right.

4) You should have 3 readings per regulator.

5) Report them like so.

pin 1 = 0.0
pin 2 = 3.3
pin 3 = 5.0

Totally forgot about this thread.

I have opened it up again and have some readings for U6,

"TAB FACING UP",,

Pin 1 7.52v
Pin 2 0.00v
Pin 3 3.31v

Also i have circled what i believe is a transistor, When the dock is switched off the 2 pins i have pointed out have no continuity but when i switch the dock on is shows continuity, I am pretty sure it is shorting to ground but only when switched on?

Any ideas?

[gilly1984]

Re: JBL stage micro, no sound?

Sack it boys, gonna throw it in the bin, cant be arsed with it.