What is the DC voltage on all 3 terminals of Q22? Please just give me the exact voltages. Copy and paste the following and fill in the 3 voltages.
Base?
Collector?
Emitter?
Base?
Collector?
Emitter?
Q21 voltage regulator 6cw bc81740
I have
Base 12.43vdc
Collector 0.00
Emitter 0.00
Datasheet says I should have
Base 12.43
Collector Base voltage +-1%
Emitter 5v
I have
Base 12.43vdc
Collector 0.00
Emitter 0.00
Datasheet says I should have
Base 12.43
Collector Base voltage +-1%
Emitter 5v
I apologize I made a mistake the correct info is
Q22
Base 12.43vdc
Collector 0.576vdc
Emitter 12.45vdc
Q22
Base 12.43vdc
Collector 0.576vdc
Emitter 12.45vdc
Q21 correct readings
Base 0.000
Emitter 0.000
Collector 12.43
Still learning sorry for wrong values but these are correct .... i read datasheet and realized I'd used wrong pin out first readings my mistake
Base 0.000
Emitter 0.000
Collector 12.43
Still learning sorry for wrong values but these are correct .... i read datasheet and realized I'd used wrong pin out first readings my mistake
"Q21 voltage regulator 6cw bc81740" <<< What do you mean by 'voltage regulator'?
Are you sure that Q21 is that part number?
Are you sure that Q21 is that part number?
I know q21 has 6cw written on it. ..... bc81740 came up but it was listed as voltage regulator and it obsolete it says I probably found wrong part # I'm struggling matching component markings to correct datasheet I've downloaded 20 datasheets tonite trying to find q21
So sot-223 is smaller than Sot-23 ?
So when I'm looking for datasheets I should type the smd code printed on transistor followed by sot-223 or sot-23 depending on which size I need?
For example
Q21
6cw sot-223 transistor
Is what I should type to find q21's datasheet and part number?
So when I'm looking for datasheets I should type the smd code printed on transistor followed by sot-223 or sot-23 depending on which size I need?
For example
Q21
6cw sot-223 transistor
Is what I should type to find q21's datasheet and part number?
Attachments
Last edited:
Q21 is RJJ
Q22 is 6CK
I am doing horrible keep things straight I apologize .... I'm going to write down anything I do, every voltage, every component ,markings etc, and hopefully I can keep things straight and not be so overwhelmed... I'm out of my league here.. but I'm learning alot
Q22 is 6CK
I am doing horrible keep things straight I apologize .... I'm going to write down anything I do, every voltage, every component ,markings etc, and hopefully I can keep things straight and not be so overwhelmed... I'm out of my league here.. but I'm learning alot
Did you look at the datasheet I posted? The marking is AH-16. It's shown in the DS.
This is for Q22 (attached).
When you list voltages, do so in a vertical list, with the exact voltage that your meter reads, including the terminal names. Use the datasheets to determine the terminal names.
Is Q22 shorted between any 2 of its terminals?
Did you confirm that you have remote voltage?
This is for Q22 (attached).
When you list voltages, do so in a vertical list, with the exact voltage that your meter reads, including the terminal names. Use the datasheets to determine the terminal names.
Is Q22 shorted between any 2 of its terminals?
Did you confirm that you have remote voltage?
Q22. Bcp53 sot-223
1. Base= 12.08vdc
2. Collector=304.7 MVdc
3. Emitter= 12.43vdc
4. Collector= 337.2 MVdc
1. Base= 12.08vdc
2. Collector=304.7 MVdc
3. Emitter= 12.43vdc
4. Collector= 337.2 MVdc
I am supplying 12.45vdc from my power supply to remote terminal of amp
On back side of amplifier at remote terminals solder trace I have 12.45vdc
There is no noticeable visual damage on other side of pcb. There is however a raised piece of pcb that holds smart leds and some 5v protection circuits .... I have not removed the led pcb to inspect for damage underneath yet.
On back side of amplifier at remote terminals solder trace I have 12.45vdc
There is no noticeable visual damage on other side of pcb. There is however a raised piece of pcb that holds smart leds and some 5v protection circuits .... I have not removed the led pcb to inspect for damage underneath yet.