Dead Hello Kitty Karaoke Sanrio machine

[Welchs101]

Re: Dead Hello Kitty Karaoke Sanrio machine

things seem to be working......i am going to post pics of how i soldered wire from black lead of battery to underside of black wire on main board.

[Welchs101]

Re: Dead Hello Kitty Karaoke Sanrio machine

SUCESSSSSSSSSSSSSSSSS

such a sweet word.............

THANKS THANKS THANKS................

my daughter thanks you as well...............

i think its working...............i did what you said........connected black wire from batter to main board.........i will post pic later............anyway, it plays a cd.........i still have to check other functions............i will let you know what i find..........but looks good thus far.

[Welchs101]

Re: Dead Hello Kitty Karaoke Sanrio machine

ok.... i will give that a try..........

[selldoor]

Re: Dead Hello Kitty Karaoke Sanrio machine

No - dont think that right - the switch in the socket switches the battery on when the
adapter is removed ( But the switch is not working). If you remove the socket and the switch then the battery will still not be switched on. I still think if you just solder a wire from black to black you will be ok

[Welchs101]

Re: Dead Hello Kitty Karaoke Sanrio machine

ok i removed the socket and ...well......i would have thought that this would allow the batteries to do their job............i removed the socket, inserted all the batteries, flipped the switch and .......nothing.........still did not work..........

[Welchs101]

Re: Dead Hello Kitty Karaoke Sanrio machine

one last thing.........if i remove the socket.......then the batter should work right.....without having to bypass anything.......right?

[selldoor]

Re: Dead Hello Kitty Karaoke Sanrio machine

If you mean to power straight from the battery - then no harm - I believe the circuitry on that half of the little board is mainly to help cut out ac that might get through from the adapter.

[Welchs101]

Re: Dead Hello Kitty Karaoke Sanrio machine

to bypass the socket just to see if it works is there any harm in taking the black and red wires to the main board?

[selldoor]

Re: Dead Hello Kitty Karaoke Sanrio machine

Just in time - I am away now for a week - all depends on how you are going to use it.
If you will ever want to use the adapter then I would replace the socket.
If you just want to use on battery then bypass the socket all together.
If you take the socket off you may be able to correct the switch problem or replace it with a new one Whatever -you have nothing to lose by taking it off and trying.

However you may wish to do the bypass for now and if it all works on battery then look to doing something with the socket.

[Welchs101]

Re: Dead Hello Kitty Karaoke Sanrio machine

selldoor, just now getting back to this.........been busy with other things.......

anyway, i think your on to something..........just wondering if i should "desolder" the ac/dc plug or should i just run both black and red wires to the main board...........anythoughts..........or should i adjust the ac/dc plug so that its not always "on".........



thoughts?

[Welchs101]

Re: Dead Hello Kitty Karaoke Sanrio machine

selldoor,
you might be on to something. I added a wire from the "grn" side of the battery and shorted this wire to the black wire on the "main" board..........things kinda came to life. I just did a quick test to see if anything would happen and much to my surprise the cd player laser head moved and the lcd come on. Tomorrow i will try a more stringent test.......but i wanted to let you know.

i will update you again tomorrow.

[selldoor]

Re: Dead Hello Kitty Karaoke Sanrio machine

The little one with the power socket on - I willl want you to get a short piece of wire and
connect the black lead from the battery to the black lead that goes to the big board
and possibly another piece to join the red lead from the battery to the red lead that goes to the big board. In effect cutting out that board all together. You dont need to solder
just hold in position and see if it comes on try the black to black first then the red to red.
Then if nothing both at the same time. I am just not sure if the switch is on the black side or the red side - that is why I wanted the picture.

[Welchs101]

Re: Dead Hello Kitty Karaoke Sanrio machine

selldoor, which board did you want me to take a picture of exactly?

also, to prove/disprove your idea what do you think i should try?

[selldoor]

Re: Dead Hello Kitty Karaoke Sanrio machine

Ok - i think we are right back at the beginning. I cant quite make out all the traces on that little board - can you do a straight on picture of the right hand side.

I still think the problem is inside the barrel power connector there is a switch. When you plug in the power supply in it cuts off the battery supply. When you unplug the power supply it reconnects the battery supply - I think it is not working.

[Welchs101]

Re: Dead Hello Kitty Karaoke Sanrio machine

I really like the pics with the meter on them.........

I put the battery in the unit. I measured 0Volts between the two nodes as you showed in the pic.

I measured the resistance between the two nodes and ....well....it was hard to get a reading but it varied and it was around 120Kohms........kinda jumped all around. but i think this is what the avg value would be.

[selldoor]

Re: Dead Hello Kitty Karaoke Sanrio machine

Its like snakes and ladders

Try this as I asked in post13

Actually I think you have answered that - it was zero - yes.

Try this one instead

[selldoor]

Re: Dead Hello Kitty Karaoke Sanrio machine

Its like snakes and ladders

Try this as I asked in post13

[Welchs101]

Re: Dead Hello Kitty Karaoke Sanrio machine

sorry forgot to mention that.....

for switch in the "off" position
ALL ZERO VOLTS

similarly, for he switch inthe "on" position
ALL ZERO VOLTS

i could not get any reading again, that is when i use the gnd on teh back of the board.

[selldoor]

Re: Dead Hello Kitty Karaoke Sanrio machine

And with the switch switched?

[Welchs101]

Re: Dead Hello Kitty Karaoke Sanrio machine

ok......with volt meter on measuring DC voltages.

Black probe on the "Gnd" label on the back of the board.

Red probe on the numbered nodes 1,2,3,4,5 and 6.

ALL voltages measured 0Volts.