YAMAHA B-4 power amp

[salamander]

Hello ! I really need help finding a service manual for the YAMAHA B-4 . Thank you in advance!!!

 

[bobdod]

HiFi engine has the manual for the M-4. It's the same amp for the most part from what I understand.

 

[avionic]

HiFi engine has the manual for the M-4. It's the same amp for the most part from what I understand.

Different power supply.. M-4 has two big caps and the B-4 has 4 big caps for starters.

 

[bobdod]

Different power supply.. M-4 has two big caps and the B-4 has 4 big caps for starters.

Interesting, I always thought they only had minor differences, but you are very much correct. Was the B-4 even sold in North America, or was it JDM only?

 

[avionic]

I've only seen 100v Japan models.

 

[salamander]

bobdod and avionic - thank you for the useful information ! I'll look at the service manual for the M-4.