The photos I have of the 800a2 have 100 ohm resistors but its diagram shows 100 ohm resistors. It's an earlier version.
Do R16 and 25 heat up with those 4 resistors removed?
Do R16 and 25 heat up with those 4 resistors removed?
No .
In an earlier post I think post #7 I have a picture of 100 ohm resistors in locations R16,25
I think the diagram may be wrong
In an earlier post I think post #7 I have a picture of 100 ohm resistors in locations R16,25
I think the diagram may be wrong
On 1 side of R16 I get 20.66 volts the other side of that resistor I get 0.62volts
On 1 side of R25 I get -19.34 volts and 0.62 volts on the other side
So I think the value of the resistors is to high .
Should I gradually lower the value of 1 resistor to see what the voltage is on the opamp ?
Say start with a 470 ohm and see if I get voltage on the other side of the resistor
On 1 side of R25 I get -19.34 volts and 0.62 volts on the other side
So I think the value of the resistors is to high .
Should I gradually lower the value of 1 resistor to see what the voltage is on the opamp ?
Say start with a 470 ohm and see if I get voltage on the other side of the resistor
In post 7 they were open I replaced them according to the schematic now I get no voltage at the opamps .
In post 7 they were 100 ohm resistors I replaced them with 1k resistors since that’s what the schematic shows goes in those locations .
I put the 1k resistors in according to the schematic and not the picture since everytime I power the amp up it would burn a lot of resistors so I thought the value of 100 ohm may be wrong
In post 7 they were 100 ohm resistors I replaced them with 1k resistors since that’s what the schematic shows goes in those locations .
I put the 1k resistors in according to the schematic and not the picture since everytime I power the amp up it would burn a lot of resistors so I thought the value of 100 ohm may be wrong
I replaced them since post 7 .
And no I haven’t replaced them since post 107 since they measure fine
And no I haven’t replaced them since post 107 since they measure fine
a 1k resistor with 20v across it should be desoldering itself from heat.
After 107, did you say that they were within tolerance?
After 107, did you say that they were within tolerance?
After post #107 they are still within tolorance .
The problem I’m having is on 1 side of the resistors I get the + - voltages but on the other side of the resistors I only get 0.32 volts and on pins 4 and 8 of the opamps I only get 0.34 volts also
The problem I’m having is on 1 side of the resistors I get the + - voltages but on the other side of the resistors I only get 0.32 volts and on pins 4 and 8 of the opamps I only get 0.34 volts also
In 102, you stated that they aren't heating up.
Are you saying that 1k resistors with 20v across them are not heating up?
Are you saying that 1k resistors with 20v across them are not heating up?
Ok I rechecked them
They do not heat up before the mute delay is finished .
After the mute delay both resistors start heating up
They do not heat up before the mute delay is finished .
After the mute delay both resistors start heating up
Sorry my mistake they do heat up before the mute delay ends .
I still get 20 volts on 1 side of both of them and 0.62 volts on the other side of them
Also C305 in post 7 was a 20uf cap . I replaced it with a 100uf cap according to the schematic
I still get 20 volts on 1 side of both of them and 0.62 volts on the other side of them
Also C305 in post 7 was a 20uf cap . I replaced it with a 100uf cap according to the schematic
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Ok I figured the regulated voltages out finally .
The schematic is wrong on the values of C303,305
Now I have another problem .
On 2 channel I bet 7 volts measures across the speaker terminals
Other channel measures 25 volts across the speaker terminals
The schematic is wrong on the values of C303,305
Now I have another problem .
On 2 channel I bet 7 volts measures across the speaker terminals
Other channel measures 25 volts across the speaker terminals
On the schematic it shows them as 100uf caps . In locatiins C303,305
They are supposed to be 10uf caps
They are supposed to be 10uf caps