DVD Player Doesn't Spin Up Disc

[John]

Hi,

I've got a Toshiba SD-1200 DVD player which won't spin up when you
insert a disc in the tray. Originally, the spindle motor had a bad
contact causing the motor not to spin at all with power applied. The
motor spins now after cleaning the contacts and power is applied
directly to the motor. But it won't spin when you connect the motor
back to the circuit.

By swapping the control board with my friend's working one, I was able
to determine that the fault lies somewhere on the control board - the
player works fine with the working control board installed.

Can anyone tell me what part has likely failed on the control board
which is likely to fix the player once the component is replaced?

Thanks,
John

 

[Sofie]

John:
It might be a bad motor driver chip or circuitry..... or problem could be
caused by a variety of things causing laser to not achieve focus.

 

[Sam Goldwasser]

John:
It might be a bad motor driver chip or circuitry..... or problem could be
caused by a variety of things causing laser to not achieve focus.

Since there was also a problem with the motor, a bad driver chip does
sound like a possibility. Any laser problem would not have damaged
the motor (or vice-versa).

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[Ampdoc]

IC503 is the 5-channel motor driver. Power for the SPDL comes from that IC,
it's a KA3032, Toshiba P/N 79040150. 48-pin surface mount, on the DVDM pcb.
Most likely your problem. I'd replace the spindle motor with a new one if I
were changing the IC simply because the IC costs more than the motor, and if
that motor is drawing too much current it will just cook the new IC.


--
Jammy Harbin
J & J Electronics, Inc.
227 S. 4th St.
Selmer, TN 38375
731-645-3311

 

[John]

Are spindle motors for DVD players available at a reasonable price? In
reviewing some of the past postings about spindle motors in various
newsgroups, it seems spindle motors are not sold as a discrete part by
manufacturers. Instead, the motor is sold as part of the laser
assembly. It seems like few people repair DVD players as a result
because the laser assembly often costs as much or more than the
original player itself when purchased from the manufacturer. This
doesn't include labor, of course.

What's the best way to unsolder a surface mount chip like this,
without lifting traces? A hot air gun comes to mind. I'll practice on
some scrap boards first, but thought I'd ask this before trying.

Thanks to everyone responding to my post!
John

 

[Mark D. Zacharias]

It is rare to find spindle motors separately for DVD players. Pioneer offers
them for some models. Toshiba doesn't sell them, but I was able to swap one
from a bad-laser unit to one which only had a bad spindle motor just today.
The entire subchassis was 130.00 wholesale ( I bet they sell a lot of
those!) the used motor was 0.00.

Mark Z.