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Old 27th April 2006, 10:52 PM   #1
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Unhappy Just installed VAM1202.....

...on my Philips CD753, but the player is dead !
The tray opens but after closure the CD motor doesn't spin and the laser stands still in its position; the display says "READING" but after few minutes the tray opens itself.
I changed the older VAM1201 with replacement VAM1202 because I was receiving focus errors but now I'm stuck !
Where did I go wrong ?
Can you help me please ?

Pierluigi
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Old 28th April 2006, 12:15 AM   #2
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Default Re: Just installed VAM1202.....

Quote:
Originally posted by martipie
...on my Philips CD753, but the player is dead !
The tray opens but after closure the CD motor doesn't spin and the laser stands still in its position; the display says "READING" but after few minutes the tray opens itself.
I changed the older VAM1201 with replacement VAM1202 because I was receiving focus errors but now I'm stuck !
Where did I go wrong ?
Can you help me please ?

Pierluigi
on some Vams there is on bottom pcb beneath the laser, one soldered bridge (one circular dot cut in two halves)...look it is soldered or not; if yes,then desolder it
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Old 28th April 2006, 11:01 PM   #3
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Wink Re: Re: Just installed VAM1202.....

Quote:
Originally posted by choky

on some Vams there is on bottom pcb beneath the laser, one soldered bridge (one circular dot cut in two halves)...look it is soldered or not; if yes,then desolder it

THANK YOU Choky,
I read some post about the soldered bridge but couldn't find any....but after you advice I saw better and noticed 3 pins soldered togheter in the back of the laser.
Now all it works and the player is back to life.

Live long and prosper :-)

Pierluigi
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Old 18th September 2013, 04:35 PM   #4
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Hello guys,

Just having the same problem with the VAM 1201 I replaced today on a Philips CD750.

Pierluigi, can you please specify which two pins are soldered together on the back of the laser?

Looking at it, there is only one option, the top two on the left-hand side when looking from back to front, directly to the laser diodes solder pads.

Thanks in advance!

Best regards,

Radko
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Old 18th September 2013, 04:44 PM   #5
Mooly is offline Mooly  United Kingdom
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Any shorting pads would be arranged to directly short across the laser. If your stuck just post a clear photo of the foil and we should be able to tell from that but it should be straightforward to identify if it has or it hasn't.
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Old 18th September 2013, 06:13 PM   #6
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Hello!
Thanks for the reply!
Enclosed are some links to the pictures of the VAM1201 pickup
I suppose it is the tin bead on the left, but not exactly sure.

Click the image to open in full size.
Click the image to open in full size.
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Old 18th September 2013, 06:36 PM   #7
Mooly is offline Mooly  United Kingdom
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I can't clearly make it out but it doesn't look to be in the right location for a shorting link. Usually it would be on the plain foil somewhere... if it indeed has one. All the "similar" CDM12xxx type I have seen haven't got one.
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Old 18th September 2013, 06:41 PM   #8
Mooly is offline Mooly  United Kingdom
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Can you see any light from the laser in the couple of seconds when it does the focus search routine (lens bobbing up and down) ? Look from at least 30 cm away.
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Old 18th September 2013, 07:58 PM   #9
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The lens does focus, the up and down movement is present, the spindle works, spins up, but does not read the TOC. And after, it either freezes on READ, or gives ERROR message.

Forgot to say, no shorting link on the ribbon cable.
Just checked in the dark, no light from the laser.
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Last edited by radkosechko; 18th September 2013 at 08:03 PM.
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Old 19th September 2013, 06:13 AM   #10
Mooly is offline Mooly  United Kingdom
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I'm still not totally convinced on this. You say it spins up. Does it "spin up" with no disc present ? or if you put the disc in upside down ? Use a disc with a dark label for that.

Normally the spindle motor only operates after focus has been found and the fact yours is spinning suggests the laser is lit and the servo is at least finding focus. The light from the laser can be hard to see as its very near the infra red end of the spectrum. You could try looking at the lens through a digital camera to see if anything shows.
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