B225 powers on but not respond

[mvdventura]

Hello All,

Greetings from Spain.

The thing is that I own a B225 cd player and after cleaning up the interior of the device using an air blower the player powers on automatically when plugged in, the cd tray opens and closes with no issues but the command keys do not respond when pressed. Also, no information appears on the front screen and I cannot power off the device with the "Power" key -the player has to be plugged off.

I have to remark that the player was working fine before cleaning up.

Note: the command key contacts are pretty clean, as the connector pins of every PCB board.

Would you help me out?

Thank you in advance.

Daniel

[MilanMilosevic]

Re: B225 powers on but not respond

Check that all connectors cables are plugged properly and tight in place.

[mvdventura]

AW: Re: B225 powers on but not respond

Check that all connectors cables are plugged properly and tight in place.

What "connectors cables" are you referring to?

Thank you.

Daniel

[borchee]

AW: B225 powers on but not respond

Hola Daniel,

what did you actually do?...just opening the lid and blowing out dirt? - according to: "Note: the command key contacts are pretty clean, as the connector pins of every PCB board.", you disassembled the player at least partially.

And what is ment with: "...the cd tray opens and closes with no issues but the command keys do not respond when pressed."?...can you open/close the drawer with the Load-Button?

As for the Connectors...see picture...check all of them, not just the two ones.

What's your opinnion, Milan, could Daniel have a problem with the end-switch (rear light barrier)?

Regards
Borut

[mvdventura]

AW: B225 powers on but not respond

"what did you actually do?...just opening the lid and blowing out dirt? - according to: "Note: the command key contacts are pretty clean, as the connector pins of every PCB board.", you disassembled the player at least partially."


First, I opened the lid and blowed dirt. The player was very dirty but working correctly.

Second, after cleaning the player up I tried it on and found out it was defective as previously mentioned. Then I checked the pins of every PCB board in order to get them properly connected to the front board, also I checked the command keys to see if they had any filth that prevented the player from working and they were very clean.


"And what is ment with: "...the cd tray opens and closes with no issues but the command keys do not respond when pressed."?...can you open/close the drawer with the Load-Button?"


I can open and close the drawer with the "Load-Button"


"As for the Connectors...see picture...check all of them, not just the two ones."

I´ve checked all the connector several times and they seem to be tightly connected.


Finally, the impression I got is that the player gets power from the mains but at the same time seems to be blocked as the different function keys do not work.

Thank you for your assistance.

Daniel

[borchee]

AW: B225 powers on but not respond

I'm pretty sure you have a problem with the end switch. Naimly, this thing tells the player that the drawer is closed and it should be ready to accept commands.

My english is poor, unfortunatelly, but you'll see what i mean:
- i own a B225 in working condition
- if i open the drawer with the load button, display is blank, player can't be turned off with power button and it responds only to three commands/buttons...load (closes drawer, display stays blank), play (closes drawer, begins to play and display goes on) and programm (displays goes on awaiting next programm steps...drawer stays open).

If your player performs the same way (with drawer closed), the drawer isn't closed/told to be closed to the player. Please, bear in mind, that i'm no expert, but the more information you disclouse, the better the troubleshooting.

Regarding to the service manual, the player can be fooled into thinking the drawer is closed, when actually open, with "bypassing" the end switch - this thing can be phisically adjusted (i mean by hand, not by electronic settings), so it could be you accidentaly messed it up.

[mvdventura]

AW: B225 powers on but not respond

I'm pretty sure you have a problem with the end switch. Naimly, this thing tells the player that the drawer is closed and it should be ready to accept commands.

My english is poor, unfortunatelly, but you'll see what i mean:
- i own a B225 in working condition
- if i open the drawer with the load button, display is blank, player can't be turned off with power button and it responds only to three commands/buttons...load (closes drawer, display stays blank), play (closes drawer, begins to play and display goes on) and programm (displays goes on awaiting next programm steps...drawer stays open).

If your player performs the same way (with drawer closed), the drawer isn't closed/told to be closed to the player. Please, bear in mind, that i'm no expert, but the more information you disclouse, the better the troubleshooting.

Regarding to the service manual, the player can be fooled into thinking the drawer is closed, when actually open, with "bypassing" the end switch - this thing can be phisically adjusted (i mean by hand, not by electronic settings), so it could be you accidentaly messed it up.

Hello Borchee,

Thank you for your help.

I think you describe pretty well what is happening with my B225, except when the drawer is open if I press Play the drawer closes but does not start playing. I did not try the "Programme" button with the drawer open, though.

Would you let me know where can I find that "end switch" inside the B225 or in the service manual -that I have one PDF file-?

Anyway, you are very kind.

Thank you again.

Regards,

Daniel

[borchee]

AW: B225 powers on but not respond

Hi Daniel,

...I think you describe pretty well what is happening with my B225, except when the drawer is open if I press Play the drawer closes but does not start playing...

i thought you might say that.

If i'm not wrong, the player won't start playing because he thinks the drawer is still open due to false information from the light barrier/end switch/opto-coupler. This thing is being closed/opened trough a plate which can be adjusted and also easily messed up (by bumping into it with a vacuum hose, for example ) if the screw isn't tightened properly/got loose.

The picture shows:
plate B that operates the switches/opto-couplers C (there are two of them, the other is to the front) and is held in place with the screw A...see also picture in Post #4 - you can find the thing left off the lower arrow.

Hope this could be helpfull.

Regards
Borut

[MilanMilosevic]

Re: B225 powers on but not respond

Daniel, did you also blow air onto transport and laser pickup?

[mvdventura]

AW: B225 powers on but not respond

Hi Daniel,



i thought you might say that.

If i'm not wrong, the player won't start playing because he thinks the drawer is still open due to false information from the light barrier/end switch/opto-coupler. This thing is being closed/opened trough a plate which can be adjusted and also easily messed up (by bumping into it with a vacuum hose, for example ) if the screw isn't tightened properly/got loose.

The picture shows:
plate B that operates the switches/opto-couplers C (there are two of them, the other is to the front) and is held in place with the screw A...see also picture in Post #4 - you can find the thing left off the lower arrow.

Hope this could be helpfull.

Regards
Borut

Thank you so much Borut. I´ll check it out and I´ll let you know the results.

Daniel

[mvdventura]

AW: Re: B225 powers on but not respond

Daniel, did you also blow air onto transport and laser pickup?

Milan,

I did not blow air onto the transport and/or the laser pickup.

Thank you very much.

Daniel

[mvdventura]

AW: B225 powers on but does not respond

Hello Borut and Milan,

Unfortunately the issue is not at the light barrier.

I´ve proceeded as follow:

1.- Checked both screws (front and back light barrier) and found out they were tightly screwed.

2.- Pressed the load button to close the drawer and before it reached its stop position I covered the back light barrier with a piece of paper with te result of the drawer stopping. So I have to understand the light barrier is working fine. (I proceeded the same way with the front light barrier, in this case opening the drawer, with the same result.)

I´d appreciate very much what you think.

Daniel

[borchee]

AW: B225 powers on but does not respond

Hi Daniel,

...Pressed the load button to close the drawer and before it reached its stop position I covered the back light barrier with a piece of paper with te result of the drawer stopping. So I have to understand the light barrier is working fine...

Have you tried the commands with the drawer not fully closed and the light barrier interrupted?

I had prepare the following (you were faster and it seems i'm wrong, unfortunatelly):

i can think of a few disalignments (D, E, F) or reasons for it...no warranty, though :

D)
1 - the plate has been moved somehow...the screw might have been loose and the compressed air did the rest
2 - the whole drawer mechanism and/or the PC has been moved (there is a certain amount of tolerance between holes and screws in the mountings for fastening the mechanism/PCB to the chassis)...plausable but unlikely, as the fault occured prior to removing PCBs and/or mechanism

E)
- the plate has been rotated by bumping into it when blowing out dirt or like under D)1...plausable

F)
1 - the plate has been moved by bumping into it when blowing out dirt or like under D)1...plausable, altough i'm not sure if possible
2 - the PCB isn't completely inserted into the front PCB (pushed forward enough, altough i'm not sure if possible )...unlikely, as the fault occured prior to removing PCBs and/or mechanism.

In general, the light beam must be interrupted (light sensor completely covered with the plate to insure no LED-light falls onto it). You can test that with an insert (picture C) altough adjusting the plate should be equaly simple.

The last cause i can think of is that by blowing dirt around, some of it settled on the front optocoupler interrupting the light beam - i don't know though, how the player would behave with both optocoupler light beams interrupted.

And hereby my "wisdom" is drained.

Regards
Borut

P.s. I adjusted the plate by mine few years ago. Reason: bought on Ebay, poor packaging and no transport screws, had to remove the complete drawer mechanism and thereby i removed the plate also...sadly i can't recall in which directions and by how much can it actually be moved/rotated.

[borchee]

AW: B225 powers on but not respond

I'm still intrigued, Daniel, so...

...Pressed the load button to close the drawer and before it reached its stop position I covered the back light barrier with a piece of paper with te result of the drawer stopping. So I have to understand the light barrier is working fine...

Try the paper thing again on the rear one, only this time wait for the drawer to close - i wasn't reffering to faulty light barriers, but to the dissalignment of the plate which operates them. If this does the trick, either the drawer doesn't close properly (very likely) or the plate must be realigned.

If it doesn't, what happens, if as follows: drawer is open, display is blank, hitting Play closes drawer but won't start playing - does the display stay blank or does it go on when the drawer closes?

Milan's question about blowing air onto the transport and/or laser is legit - you may not have done so directly, but it is possible that dirt got swirrled up and:

1) settled on the guiding rails (they are greased, so dirt could stuck) of the drawer mechanism...this can cause the drawer not to close fully (as mentioned above) whereby the rear light barrier does not get interrupted (display should be blank)...push the drawer manually into full close and see what happens (display should go on and play should start - perhaps after hitting Play again, i'm not sure)...clean the rails (do that eitherway)

2) came between the laser and the lense...in this case the display goes on after closing, but play won't start because the laser can't focus (as recommended in the Service Manual, blow the dirt out).

Others have experienced similar problems due to capacitors problems and broken flat cable (the one to the mechanism i mean...the blue ones are told to be particullary prone to breaking).

NOW i'm done with ideas!

Borut

Oh, bytheway, the player CAN be powered down with drawer open:
- hit Programm
- hit Power
- hit Power again...player goes into standby and the drawer stays open.

[MilanMilosevic]

Re: AW: B225 powers on but does not respond

Pressed the load button to close the drawer and before it reached its stop position I covered the back light barrier with a piece of paper with te result of the drawer stopping.
Daniel

Did the display show something or did it remain blank?