Testing an STK0177 amplifier....need advice!

[Mcass]

I have come across an old Technics SA5160 stereo receiver that I am trying to bring back to life. There is no sound coming from the right channel. Each channel uses an STK0177 IC amplifier. Basically I have two questions. First, how can I test the STK0177 and second, how can I test the VR balance control? If anyone could help with explaining this and offer other potential issues in that part of the circuit I would appreciate it. It's been a long time since I've messed around with electronics and not real sure where to start.

 

[davenn]

hi there
welcome to EP

have you done any googling for a service manual or at minimum a schematic ?
its probably going to be needed for a repair like this

if and when you find one post a link to it so that those that may be able to help can see what they are dealing with


Dave

 

[Martaine2005]

Hi Mcass,
You can find the service manual here.
Under the the preview picture it will say .....processing.
WAIT a couple of seconds and it will say "Get Manual".

Martin

 

[Mcass]

hi there
welcome to EP

have you done any googling for a service manual or at minimum a schematic ?
its probably going to be needed for a repair like this

if and when you find one post a link to it so that those that may be able to help can see what they are dealing with


Dave

I was able to find this:

http://www.aliexpress.com/store/pro...-REGULATOR-APPLICATION/107262_1457029120.html

It looks though like that might be for a different IC than pictured though.

 

[Mcass]

Hi Mcass,
You can find the service manual here.
Under the the preview picture it will say .....processing.
WAIT a couple of seconds and it will say "Get Manual".

Martin

I was able to find a service manual but that doesnt tell me how to actually test the components in question. I can find them, just not sure how to test to verify which component is actually the issue here.