hi everyone, new here , hope i'm in the right place. i'll start with my first problem....., not a hi fi amp but a chip amp all the same, i have an indie sky 10 guitar amp (please don't laugh, i know it's a bit rubbish , all the same it does suit my purposes very well at the moment, problem is it's given up the ghost.., guitarist friend used it on a jam session a while back and it was used very hard all day,,, it then just stopped. he gave it to me (if i could fix it!!!!) to use in my home studio. even though its not great the overdrive channel sounded ...goood.
this is the problem.
1. it doesn't power up, no pilot light, no switch on thump or anything
2. there is no evidence of blown components, no burning at all and no damage to any components
3.i have checked the transformer, there appears to be no voltage at all from the power transformer, or any voltage anywhere on the board. (it did say .03 volts (ac at the transformer)?,
could it simply be power supply problem?
brief rundown
the amp is rated at 10 watts output, it uses tda 2050A chip
the power diodes are 1n4002 ( 4 of)
the transformer siply gives 4TZ-10, TY0603, cant find any info on this at all,.... i assume it is split rail ( red black red on the output side, any idea on voltages (for replacement)
Please help!!!! the photos give you an idea of layout.
i have built ("from kits") a pair of maplin 50 watt mono blocks with uprated power supplies,(individual to each channel,) and a pre amp, they are rather goood, these are kit amps and i merely followed the instructions but when it comes to troubleshooting i'm a bit lost. could anyone give any help on the indie repair, there is no point buying anything else as i'm sure it must be a simple repair, anyway thanks in advance for any help you can give,,