Hameg HM1507-2 repiar

[jackie.cen]

hi there,

i got a hameg hm1507-2 scope.it did not display anything.so i repair it.it did not have the HV voltage.i change the voltage multiplier,it made by myself.
so it displayed.but the screen did not display the whole image ,only about 1/4 image.
i change the all of the potentiometers,it did not work as expect.does someone have the schematics for this model?

Best regards,
jackie

[jackie.cen]

the Follow

[jackie.cen]

the follow

[ElecSeb]

https://www.eevblog.com/forum/repair/hm1507/msg1565743/#msg1565743

[jackie.cen]

thank you!
i fix it,now it's ok!

[jackie.cen]

first i find the voltage multiplier is dead,so i made one by hand.it's about 85:8:800,65v 75% square singal input.

[jackie.cen]

after the new voltage multiplier,the screen is still blank.i change the resistances,the screen is work,but image is out of the screen.

[jackie.cen]

the image is bigger than screen,because the amplitude of x and y singal is big.my plan is reduce the amplitude of x and y singal.change 3 resistances ,about half of them.

[jackie.cen]

now the image is ok,but image is not clean,the text can't read.change the potentiometer and focus on the front panel.it would be ok.

[carlitos]

first i find the voltage multiplier is dead,so i made one by hand.it's about 85:8:800,65v 75% square singal input.

Hi,
sorry bother you, but I have same oscilloscope and I am repairing it.
Unfortunately the high voltage transformer was lost in transportation to a rewind shop to repair it.
Is it possible to send some details how you rewind this transformer, like how many turns, wire diameter, wire orientation and pinout connection.

Thanks a lot.

Best regards,
Carlos