Abs-1q76

[oztony]

Gday all,I was wondering if anyone had a schematic of the power supply of this decoder(AUSTAR ABS-1Q76.)Its flashing over on rv1 which looks like its across a coil.I just cant adentify this componet. and im out of an austar area atm to send it back but have a humax that doing the job for now.

Cheers Tony

[Mysterex]

not familiar with the atlas PSU but rv1 in a switchmode PSU is generally a MOV (Metal Oxide Varistor) or similar transient suppression device (surge protector)

Post a pic or whats printed on the package to make sure

if its in parallel with the AC supply and is breaking down under normal AC voltage you could try removing it

regards...

[vrsim]

- TVR 14621

OK to remove it to test if anything else wrong with power supply, only used as over voltage protection.
Cheers
vrsim

[oztony]

Thanks for the feedback I no what a MOV is and it dosent look like one Ill take a pic when I get home from work it look like a zener diode to me

[Mysterex]

circuits for ABS-6G76, 8776, 9876

is the RV1 located the same position as the MOV in these circuits - RV10 on the 6G76

MOVs are manufactured in different packages and don't necessarily look like a blue HV ceramic cap etc

notice the circuit symbol for the MOV - 2 forward facing zeners connected together

regards...

[oztony]

Sorry just got my internet connection back! Spot on Mysterex RV10 is across L11 so it looks like a z31045ul MOV so it a voltage protection device may be the coil L11 is faulty? look like just some filtering before it goes into the rectifier.Thanks for the schematics at least iv go somthing to work with now.Thanks again Mysterex and vrsim

Tony (ex TonyPsx)

[oztony]

Fixed cap c14 short circuit the mov was doing its job to protect the integrity of the circuit

Thanks again Mysterex and vrsim

Cheers Tony