Repair of Yamaha A-700 amplifier

[Emil88d]

Hello, can someone help me with repairing old yamaha?🤔 I would like to repair this amplifier to learn a Little about electronics but i dont know how to start. When i buy it it has broken transistor 2SC1815 and smoked resistor 1.5k ohm and i replace them and try to power on through lamp and it started then i pluged fuse and the resistor started to burn. I discontcted power source from the main board and measured the voltage on the 2 big capacitors and it was + and - 58,6v
Can someone help me what i need to check more to find what coused burning of the resistor.
I am adding the schematic and the picture where the parts was damaged.

[PKTKS]

There is no magic or fancy solution here

All discrete boards require testing each component per si

It seems you do have a dead short

A common "fit all"  solution is to power the board
with a variac..  raising it enough to not burn...

But enough (via CC/CV control) to hot spot the dead short culprit
Today thermal cameras are handy..
10y ago we just put  some vapor like fluid or alcohol

your finger sometimes...

Paul

[PKTKS]

and BTW.. there is a SERVICE MANUAL for this class
which in time was quite complex to diagnose.

It helps a lot with proper check points...

Paul

[Emil88d]

Ok thank you for targeting me to resolve the problem.👌

[Emil88d]

I dont find any hot spots but i started to desolidering end transistors and all at the end are shortcircut and even other transistors at this channel so i think it is not worth to buy all of the transistors.