DVD Drive motor power

[Chas]

Working on a friends Goldstar GBV441 DVD/RW/CD/RW-VHS/RW unit.
The DVD motor does not spin.
. . I did cut one wire on the DVD drive motor...it showed resistance. Just
to be sure
(cheapo multimeter) I ran 5 vdc (from a model RY controller) and the motor
spun with no problems...
.. . . The motor gets it power from a small board. This is a mount for a 2
wire N.O. switch feeding the drive motor? The switch is activated by the
optical sensor moving to the front and pushing a lever on the switch. This
switch board is not getting power from the optical board which in turn is
connected to a daughterboard above the main motherboard. The llaser is lit
and the optical drive motor is working on the optical frame. The disc door
works ok.
.. . . .I pulled and re-inserted the two small ribbon cables (between the
daugherboard and the optical frame) a few times, just to make sure no
corosion was in the contacts and
that did not help. I would imagine the narrowest ribbon cable is the
power/control feed, and the widest one is the data cable. The laser tracking
slide moves ok and the laser is illuminated. The spinner frane elevates and
depresses ok. Everything seems to be working fine except the DVD motor is
not getting power.
.. . . I am sure my friend would appreciate this one having its DVD working
as it also plays mp3's
.. . . .in advance. . .thanks
.. . . . . .charlie.

 

[DA]

responding to
http://www.electrondepot.com/repair/dvd-drive-motor-power-136411-.htm
DA wrote:

Working on a friends Goldstar GBV441 DVD/RW/CD/RW-VHS/RW unit.
The DVD motor does not spin.
. . I did cut one wire on the DVD drive motor...it showed resistance.
Just
to be sure
(cheapo multimeter) I ran 5 vdc (from a model RY controller) and the
motor
spun with no problems...

DVD spindle motors are usually brushless DC (BLDC) motors that would not
work by just powering them with DC - you'd need a driver IC that creates
the proper waveforms. So, my guess is that this deck has just a simple DC
motor instead? Otherwise the 5VDC trick wouldn't work. How many wires are
coming out of that motor?

The laser tracking
slide moves ok and the laser is illuminated. The spinner frane elevates
and depresses ok. Everything seems to be working fine except the DVD motor
is not getting power.

I'm not familiar with the particular model but in those DVD drives I've
seen insides of, all motors (and also any solenoids) are driven by the
same IC. ROHM's BA5995FM would be one example (or others in BA68xx
series). It's a 28-leads HSOP28-M package (with a thick grounding/heat
sink solderable connector plate in a middle) that requires very little
extra components. In other words, if the motor does not spin and the motor
itself is OK, it's either the IC or the Hall-effect sensors (or whatever
other sensors there may be in the speed control feedback) - either way the
repair is very tricky because the faulty parts are the least serviceable.

I don't want to suggest it's necessarily your case but you may want to
look around for a 28+ pin driver IC that may be connected to the motor.
Then work your way from the motor (the best serviceable) down to the IC
(the least serviceable)

Post more info about the motor, I may be able to help more if it's type is
known.

Good luck!

 

[Mark Zacharias]

Working on a friends Goldstar GBV441 DVD/RW/CD/RW-VHS/RW unit.
The DVD motor does not spin.
. . I did cut one wire on the DVD drive motor...it showed resistance.
Just to be sure
(cheapo multimeter) I ran 5 vdc (from a model RY controller) and the
motor
spun with no problems...
. . . The motor gets it power from a small board. This is a mount for a 2
wire N.O. switch feeding the drive motor? The switch is activated by the
optical sensor moving to the front and pushing a lever on the switch. This
switch board is not getting power from the optical board which in turn is
connected to a daughterboard above the main motherboard. The llaser is lit
and the optical drive motor is working on the optical frame. The disc
door works ok.
. . . .I pulled and re-inserted the two small ribbon cables (between the
daugherboard and the optical frame) a few times, just to make sure no
corosion was in the contacts and
that did not help. I would imagine the narrowest ribbon cable is the
power/control feed, and the widest one is the data cable. The laser
tracking
slide moves ok and the laser is illuminated. The spinner frane elevates
and depresses ok. Everything seems to be working fine except the DVD
motor is not getting power.
. . . I am sure my friend would appreciate this one having its DVD working
as it also plays mp3's
. . . .in advance. . .thanks
. . . . . .charlie.

Bad laser pickups are quite common. Probably a waste of time.

Sorry.

Mark Z.

 

[Franc Zabkar]

Working on a friends Goldstar GBV441 DVD/RW/CD/RW-VHS/RW unit.

Service manual:
http://elektrotanya.com/goldstar_gbv-441.pdf/download.html
http://elektrotanya.com/lg_gbv441.pdf/download.html

User manual:
http://support.radioshack.com/manuals/ome16-3904.pdf
http://support.radioshack.com/produ...sku_id=16-3904&Name=DVD and LaserDisc&Reuse=N

- Franc Zabkar

 

[Franc Zabkar]

Hey Franc. Where's the actual download link on that page ? Every time I go
looking for a manual online, I keep fetching up at that site, but I never
seem to be able to find the download link to the actual pdf. Everything that
you can click on seems to be either a Google ad, or some ancillary program
download. I'm probably being blind and dumb. Put a dopey old sod out of his
misery, will you ?

Arfa

There is a "Get Manual" link about two thirds of the way down the
page, just to the right of centre.

- Franc Zabkar