[SOLVED] PC Engine Duo - No disc spin: not pots and new laser?

[beepinghazel]

I lubricated the rails and cleaned the gears, and that really reset things (they must have been adding some resistance to read operations). Luckily I went back and got everything working again. It's down to a low hiss that's not really detectable against the background/ambient noise of the room.

(pots)

http://sendvid.com/3dlpl3rt (video)

So far so good.

edit: thanks Keith Courage for the VR104 tip. That got it quiet.

edit: Oddly enough, there's a slight tradeoff between it being quiet and load speeds during track changes. Is that my imagination? I prefer quiet to load speed.

[thesteve]

There is a trade off if you set it too quiet
It also makes it less vibration sensitive

[thesteve]

More not less

[sherpard]

Good morning,
I followed the work carefully.

I tested the voltages that occur on the moteus, optical block. Everything seems ok
I make a cap head kit.

When I press run on the screen tells me "just a moment" and nothing else happens
Red led does not light

I have the impression that there is a command does not arrive at a component

I found the values in OHM

Vr101 = 12.56 kohm
Vr102 = 968 ohm
Vr103 = 3.22 kohm
Vr104 = 4.66 kohm
Vr105 = 2.13 kohm

If you have an idea???

Thank you for your help

[beepinghazel]

When I press run on the screen tells me "just a moment" and nothing else happens

 * Do you see a laser coming from the lens? (My R199 was bad)
 * Does it try to focus the laser (move up and down)? (One of my BA6290 chips was dead)

For me, each of those was a separate problem.

[sherpard]

Hey
I do not have a laser beam
I replaced 2 6290. nothing has changed
I also changed the lens. Nothing has changed

I measured the resistance that gives me 4.67k

Is it the right value?
What is the component that activates the cd?

[thesteve]

the LED not lighting is your first clue
odds are its also not reading the lid switch
look for a missing signal to IC501

[sherpard]

the LED not lighting is your first clue
odds are its also not reading the lid switch
look for a missing signal to IC501

I can not find the datasheet for ic501 (NEC D91317GD)

Have you ??

What pine I have to do the test ?

Thank you for your help

[thesteve]

search it on this forum, i posted a pin list