Did you add tiny dabs of 70% isopropyl alcohol or tape head cleaner fluid to the tiny brushes? I did.
No, that doesn't sound like a good idea to me. Maybe it's perfectly safe to have alcohol fly off the disc inside the machine as soon as you load it but that's not something I'd be willing to try.Did you add tiny dabs of 70% isopropyl alcohol or tape head cleaner fluid to the tiny brushes? I did.
I still have one of those! I have it plugged into a backup battery, but if we lose power for longer than the backup can cover, it loses my timed recording settings and the clock setting. Scanned channels (and everything recorded) are always still intact. So I can't really help you, except to say my experience is different from yours - even without power, it remembers the channels but forgets the timers.I have one of the first ones made Philips branded 3575. When I turn it off, it forgets my channels, but only my channels. I have to rescan each time. This is very time consuming and annoying and defeats the purpose of having timed recordings since it records a blank. Does this thing have some sort of battery, or something? I don't see one. Got any suggested fixes, because I don't see any.
Yeah, I think the only useful advice I have heard here is to try getting rid of the dust. I already tried that, and it only works less bad. But that was before I read about someone else doing it here. I should try again more aggressively to see if that works better. Possibly remove the MB completely and carefully wash and dry.I still have one of those! I have it plugged into a backup battery, but if we lose power for longer than the backup can cover, it loses my timed recording settings and the clock setting. Scanned channels (and everything recorded) are always still intact. So I can't really help you, except to say my experience is different from yours - even without power, it remembers the channels but forgets the timers.
Hmmm, I thought I replied to this last week. Anyway, I skimmed through the info at the beginning of the thread and didn't find anything about how to magically make all of my recordings disappear. Not that I want it to happen again.Mallo, a full HD has never caused a problem with any maggie I have, so far. It DOES blank the timers if it is full and a scheduled recording cannot be done. One thing that will clear the HD is to format it as 'new'.
Back at the beginning of this thread, there are instructions on many functions, much better explained than the manual does. There are a few 'magic' remote sequences that CAN also blast a disk to completely blank. The remote keypresses must be done quickly for them to be recognized.
I have not seen your exact problem.I have a H2160MW9 that powers up for about ten seconds, then shuts down. During the brief 10-second power-up period, the hard drive spins up but the fluorescent display only shows "------- " and the cooling fan does not run. Pushing the power button on the front of the unit has no effect. The power supply output voltages are normal during the brief power up period, then drop to half their usual voltage when it powers down.
I have checked all the power supply components and changed two capacitors that were a little high on ESR, but that did not make a difference. I checked the fan and it is okay. It’s just not getting any voltage. I suspect that the power supply is being shut down via the LOW-POWER, SAFETY2 or PWR-SW2 circuits from other boards, but the service manual lacks sufficient documentation of power-on and shutdown voltages for me to know what is normal.
Has anyone seen these symptoms and found a solution?
Thanks for the comments. Here are some replies:After seeing a youtube video on 12voltvids mentioning the solder joints around the transformer from the hot to cold side could "break" or destabilize the lead-free solder.
You should be able to check the opto-isolator with a continuity or diode tester.. but you might have to remove it to be sure.. or test with a skeptical eye to the results.
Other components can fail, like resistors and transistors.. the longer they run with failing Caps.. the more damage they can cause.
Be very Very cautious around the hot side capacitors. The 200 Volt or 400 Volt filter cap can hold a charge for many days.. and it can pierce your skin by arc'ing. It hurts a lot and its dangerous. Good luck.