have an Insignia is-pd040922 7" portable dvd player with "no disk" problem
on all video dvd's.
Have cleaned the lens, cleaned the sliding mechanism with no help.

Tried with an Audio CD and this works fine, so probably lets out the above
causes, as well as the spindle motor
Searching on google finds hundreds of similar complaints about Insignia
..
Does the CD use the same laser and lens as the dvd ?
Would appreciate any other ideas to try before I give up on this machine

"Ray"...

Does the CD use the same laser and lens as the dvd ?


** CDs use an infra-red laser while DVDs use a visible red one.

758nm as compared to 657 nm.



..... Phil

Thanks Phil...

I guess these lasers must be integrated into the same lens, cause I cant see
2 different optical units..

Ray






"Phil Allison" wrote in message
...

"Ray"...

Does the CD use the same laser and lens as the dvd ?


** CDs use an infra-red laser while DVDs use a visible red one.

758nm as compared to 657 nm.



.... Phil

On Fri, 16 Dec 2011 19:45:43 -0800, "Ray"
put finger to keyboard and composed:

I guess these lasers must be integrated into the same lens, cause I cant see
2 different optical units..

Here is a reference circuit for a Cheertek chipset:
http://www.users.on.net/~fzabkar/DVD...65-AM5868S.pdf

You can see the pinout of a Hitachi HOP-1200W optical pickup at the
top of page 3. Notice that there are separate pins for the DVD and CD
laser diodes (DVDLD and CDLD).

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

I guess these lasers must be integrated into the same lens, cause I cant
see
2 different optical units..

Here is a reference circuit for a Cheertek chipset:
http://www.users.on.net/~fzabkar/DVD...65-AM5868S.pdf

You can see the pinout of a Hitachi HOP-1200W optical pickup at the
top of page 3. Notice that there are separate pins for the DVD and CD
laser diodes (DVDLD and CDLD).

- Franc Zabkar


Thanks Frances


I found what looks to be the same assembly as mine on ebay

http://www.ebay.ca/itm/170696204492?... 4.m1423.l2649

Do you think it would work without much adjusting ? Everything looks fixed
except
for 2 little round things on the side of the pickup that might be pots,
except
I dont see a screwdriver slot. Looking at your diagram I cant spot any
adjustments

for only about $10 it might be worth trying

Ray

On Sun, 18 Dec 2011 18:04:19 -0800, "Ray"
put finger to keyboard and composed:

I found what looks to be the same assembly as mine on ebay

http://www.ebay.ca/itm/170696204492?... 4.m1423.l2649

Do you think it would work without much adjusting ? Everything looks fixed
except
for 2 little round things on the side of the pickup that might be pots,
except
I dont see a screwdriver slot. Looking at your diagram I cant spot any
adjustments

for only about $10 it might be worth trying

Ray

I used the Hitachi pickup as a general example that illustrates the
point that there are two laser diodes in a DVD player. I have no idea
what kind of pickup is actually used in your unit.

BTW, it's "Franc", originally pronounced as in Franz, but pronounced
as "Frank" when anglicised. And Frances is a female name -- Francis is
male. :-)

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.