Hi Humphrey
Need repair advice to fix a Go Video VR5940. DVD laser head
moves in/out, up/down, red light briefly on, disk begins to spin slow, then
stops and ejects DVD, displays C02. Also, there’s a tiny red light lit up on
PCB at D301. Thank you.
Hi Jack,
For your DVD with problems you highlighted, here is my take.
First how did the problem start? Sometimes if you load two
disks by mistake and close the drawer, then the disk table will be pressed down
and this will affect the disk height and the error of disk being ejected can
occur….
Also if drawer belts are worn or oily can cause this
problem. Or could just be broken gear teeth or stripped gear.
This problem sound mechanical and therefore you should
concentrate on the drawer mechanism and pickup mechanism Jack
All the best
Regards Humphrey
Humphrey,
The drawer belts are both loose and greasy with a good bit
of dust on loader cam mechanism so since I can’t get Go Video parts any more,
I'll clean and try DVD again. However, the spindle motor in this DVD is not the
type in your book. This motor is a BLDC using PWM and Hall Effect feedback and
is connected to loader PCB with a 13-pin ribbon cable. How do you bench test
the BLDC motor? Any thoughts on the tiny red LED on D301 of the supply board?
Thanks again!
Regards,
Jack R.
Hi Jack,
The spindle motor was not a suspect; I only suspected the
height which could have caused the symptoms you said.
The main suspect now is the rubber belts and the oily belt
as you rightly put it.
So just replace or clean up that belt and see if it will
solve the problem.
All the best Jack.
Regards Humphrey
Humphrey,
I wish I had your confidence that the problem was the loader
mechanism! I can't understand how a slipping loader belt would even allow the
laser head to traverse into the center of the disc, then briefly turn on the
spindle motor, then stop and fully eject the disc. However, I'll do what you
recommend and let you know the result. Thanks.
Regards,
Jack R.
Hi Jack.
I think the laser is okay, this going up and down fast means
it is trying to focus.
So the main suspect now is the CD table height.
If too low you will it making noise as it touches disk bed.
Regards Humphrey
Humphrey,
I repaired the DVD by
replacing the laser head and now the laser beam is bright enough to be visible
from the top side of the disk (see photo attached). I appreciate your help and
feedback. Thank you.
Regards,
Jack R.
Hi Jack,
Long time, congratulations for the success report, noted you
are a fighter, By the way Jack, did you take the photo at night/ with light off?
Regards Humphrey
Humphrey,
The photo was taken inside building with a ceiling light and
table lamp both turned on (60-watt bulbs each). The camera was iPhone 4S with
flash disabled. Thanks again!
Regards,
Jack R.
Jack
Oh I see, I have never considered looking at the laser light
with the disk on place but I tried it after this case and indeed confirmed it
possible though the DVD I used was very faint than yours.
Yes I have learned something new from you Jack.
Thanks, hope to write an article on this soon
Regards Humphrey
My dear friends and fellow technician, hope you have learn
something from this conversation between me and Jack, I did not ask him if he
is a technician or do it yourself gentleman but I have a feeling that he is a
do it yourself guy.
Anyone who encountered such a problem and solved it by
changing lens kindly feel free to drop a line on the comment box
Stay safe
Humphrey
Want to learn more about DVD player repair? kindly consider this eBook written from technician workbench point of view.
click the book cover for more info.
Hi Humphrey
ReplyDeleteThanks dear for this conversation I learned a lot god give more power to your arm
Cheers ...beh
Thanks for your feedback Beh, always a pleasure reading your feedback.
DeleteGod bless you too
Regards Humphrey