stalker 9 dx no audio from speaker
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- Dead Key
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- First Name: philip
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stalker 9 dx no audio from speaker
Radio Make and Model: stalker 9 dx
PCB Number: pc-893aa
PLL Number: not sure can find it on set
Test gear available: test meter
Symptoms: no sound from the speaker
What is working: everything checks out
What has been tried: done some circit tests
Did it suddenly happen ?: yes when i was talking to a friend
Anything else that may be of help?: My set was working brill was talking to a cb mate one day and the sound stopped i have done all the checks everything works 100% it keys up and it talks and recives a signal because the needle moves when i do checks with another set, The mike works brill i tested it with another cb, can someone tell me which audio part and its number to do some checks please any help would be (appreciated) thanks
PCB Number: pc-893aa
PLL Number: not sure can find it on set
Test gear available: test meter
Symptoms: no sound from the speaker
What is working: everything checks out
What has been tried: done some circit tests
Did it suddenly happen ?: yes when i was talking to a friend
Anything else that may be of help?: My set was working brill was talking to a cb mate one day and the sound stopped i have done all the checks everything works 100% it keys up and it talks and recives a signal because the needle moves when i do checks with another set, The mike works brill i tested it with another cb, can someone tell me which audio part and its number to do some checks please any help would be (appreciated) thanks
Re: stalker 9 dx no audio from speaker
Does the audio work on PA ?.
If not then check C159, 10v @330uF and C161, 10v @47uF, better still change both for 16v capacitors at the same uF value. IC507 is the audio chip.
Dave.
If not then check C159, 10v @330uF and C161, 10v @47uF, better still change both for 16v capacitors at the same uF value. IC507 is the audio chip.
Dave.
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How far is it.
Twice it's length from halfway.
Twice it's length from halfway.
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- Dead Key
- Posts: 29
- Joined: Sunday 22nd Nov 2009, 13:37
- First Name: philip
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Re: stalker 9 dx no audio from speaker
Thanks very much for your help) i done those checks c159 and c161 all checks out, i done checks with muilti meter tester ,i will have to get a ic507 audio chip; it run's very hot even when i was doing the checks so there must be a short in the chip thanks again davezodiac wrote:Does the audio work on PA ?.
If not then check C159, 10v @330uF and C161, 10v @47uF, better still change both for 16v capacitors at the same uF value. IC507 is the audio chip.
Dave.
Re: stalker 9 dx no audio from speaker
If you have any problems getting a new audio chip KCB (Knights)in the UK have them.
That's what happens when the radios been cross poled as well, It's the first IC to go pop when the idiot diode fails.
Dave.
That's what happens when the radios been cross poled as well, It's the first IC to go pop when the idiot diode fails.
Dave.
How far is it.
Twice it's length from halfway.
Twice it's length from halfway.
-
- Dead Key
- Posts: 29
- Joined: Sunday 22nd Nov 2009, 13:37
- First Name: philip
- Location: northern ireland
Re: stalker 9 dx no audio from speaker
yes the diode at the back of the set is blown and some guy has solderd a replacement onto the pcb and it looks an awfull soldering job on which i had to tidy up.many thanks dave for your help i will get onto knights about a replacement today and will let you know how things go with my stalkerzodiac wrote:If you have any problems getting a new audio chip KCB (Knights)in the UK have them.
That's what happens when the radios been cross poled as well, It's the first IC to go pop when the idiot diode fails.
Dave.
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- Dead Key
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- Joined: Sunday 22nd Nov 2009, 13:37
- First Name: philip
- Location: northern ireland
Re: stalker 9 dx no audio from speaker
hi dave would you have a part number for ic507, knights needs it to check to see if thay have them in stock thanks again dave .ragards philip.buzzby wrote:yes the diode at the back of the set is blown and some guy has solderd a replacement onto the pcb and it looks an awfull soldering job on which i had to tidy up.many thanks dave for your help i will get onto knights about a replacement today and will let you know how things go with my stalkerzodiac wrote:If you have any problems getting a new audio chip KCB (Knights)in the UK have them.
That's what happens when the radios been cross poled as well, It's the first IC to go pop when the idiot diode fails.
Dave.
Re: stalker 9 dx no audio from speaker
Yes,
It's on the schematic above, UPC1182H.
It's on the schematic above, UPC1182H.
How far is it.
Twice it's length from halfway.
Twice it's length from halfway.
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- Dead Key
- Posts: 29
- Joined: Sunday 22nd Nov 2009, 13:37
- First Name: philip
- Location: northern ireland
Re: stalker 9 dx no audio from speaker
Thanks dave i should had seen that many thanks philipzodiac wrote:Yes,
It's on the schematic above, UPC1182H.
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- Dead Key
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- First Name: philip
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Re: stalker 9 dx no audio from speaker
hi dave i have just noticed that i have power to the speaker 0.07v and when i switch the rig on; the speaker sounds as it would when i power up the rig, would a squelch malfuncion cut the audio to the speaker. many thanks philip.buzzby wrote:Thanks dave i should had seen that many thanks philipzodiac wrote:Yes,
It's on the schematic above, UPC1182H.
Re: stalker 9 dx no audio from speaker
Yes it would mute the audio.
How far is it.
Twice it's length from halfway.
Twice it's length from halfway.
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- Dead Key
- Posts: 29
- Joined: Sunday 22nd Nov 2009, 13:37
- First Name: philip
- Location: northern ireland
Re: stalker 9 dx no audio from speaker
was wondering if there was a part where i could disconnect the sq just to see if it was it, thats causeing my trouble .thanks philip.zodiac wrote:Yes it would mute the audio.
Re: stalker 9 dx no audio from speaker
Can you hear a pop in the speaker when you turn the squelch control up and down, if you can then the squelch is working fine.
How far is it.
Twice it's length from halfway.
Twice it's length from halfway.
Re: stalker 9 dx no audio from speaker
These are the voltages on the audio chip pins starting at the back of the radio in FM mode.
13.5
12.3
7.0
0.9
2.11
2.9
0.9
13.5
12.3
7.0
0.9
2.11
2.9
0.9
How far is it.
Twice it's length from halfway.
Twice it's length from halfway.
-
- Dead Key
- Posts: 29
- Joined: Sunday 22nd Nov 2009, 13:37
- First Name: philip
- Location: northern ireland
Re: stalker 9 dx no audio from speaker
i done those checks and mine does not look the same, and the sq does nothing when you turn the switch upzodiac wrote:These are the voltages on the audio chip pins starting at the back of the radio in FM mode.
13.5
12.3
7.0
0.9
2.11
2.9
0.9
13.7
12.4
4.85
0.02
5.76
7.21
4.54
i think going with these checks that this output is fryed... was wondering what your opinion was dave or is it a blown part in the set
Thanks dave you are being very helpful and it is very much appriciated regards philip
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- Dead Key
- Posts: 29
- Joined: Sunday 22nd Nov 2009, 13:37
- First Name: philip
- Location: northern ireland
Re: stalker 9 dx no audio from speaker
my tx output has gone now as well the TA473 i think the damp has got to this set and have it stored in with the hotpress to dry it out hope this set is fixable would anyone know if cobraworx would service this set and bring it back to life i already asked and they have not yet got back to mebuzzby wrote:i done those checks and mine does not look the same, and the sq does nothing when you turn the switch upzodiac wrote:These are the voltages on the audio chip pins starting at the back of the radio in FM mode.
13.5
12.3
7.0
0.9
2.11
2.9
0.9
13.7
12.4
4.85
0.02
5.76
7.21
4.54
i think going with these checks that this output is fryed... was wondering what your opinion was dave or is it a blown part in the set
Thanks dave you are being very helpful and it is very much appriciated regards philip
Re: stalker 9 dx no audio from speaker
Phil,
You have a PM.
Dave.
You have a PM.
Dave.
How far is it.
Twice it's length from halfway.
Twice it's length from halfway.
-
- Dead Key
- Posts: 29
- Joined: Sunday 22nd Nov 2009, 13:37
- First Name: philip
- Location: northern ireland
Re: stalker 9 dx no audio from speaker
thanks dave ill check it out nowzodiac wrote:Phil,
You have a PM.
Dave.