AOR AR-3000A failure

[csialv]

It's strange: the 780S09 not musch years ago makes no stock. AOR instead proposed replacing it with a 7809 with a FET added to get the signal "Strobe". I'll look for you ..

 

[Rui]

good news L780S09

Csilva,
I found L780S12 meaning its not 9v output but 12v output, I am thinking what if you can decrease the 12v down to 9v with maybe with a 3-terminal 1 A positive voltage regulator ST 7809

the L780S12 is a five pin as you know with strobe, just like the L780S09

let me know !

Regards
Rui

 

[csialv]

Here I leave a link to the sale of the substitute 780S09:

http://www.aoruk.com/proddetail.asp?prod=AR3000A-9vreg

Here the replacement of the 5V regulator:

http://www.aoruk.com/proddetail.asp?prod=AR3000A-5vreg

And here the article promised to do it yourself in pdf format.

 

[Rui]

Ref L780S12

Csilva,

Thanks for the info!!...... the problem they are very far from London downtown

However do you think I should buy the L780S12 ?

I am thinking what if I can decrease the 12v down to 9v with maybe with a 3-terminal 1 A positive voltage regulator ST 7809

the L780S12 is a five pin as you know with strobe, just like the L780S09

I still having the problem of signal "poor" and "muffy" which is a normal FM station 106MHZ.

Csilva in which setting would one set on the AR3000a to listen on normal FM...is it NFM or WFM and which areial are you using

And if any member can help or same symptoms as above it would be great if the member can us how fix it.

I have try a outside ariel and with the ariel that the scanner come with ( with no results)

Regards
Rui

 

[csialv]

Regarding your first question (use a 780S12 instead of 780S09) tell you that is not easily feasible. For that reason I gave you the links where you can order through the web parts to AOR Uk mail.

Regarding the question of FM broadcasting say that 88 to 108 MHz (in Europe) will receive mode in WFM. NFM mode (narrowband) is used for listening to amateur radio stations, ships, services, etc..

You live in a big city? Near powerful transmitters broadcasting, television or telephone?. That may be the problem, desensitization of the receiver front stage due to strong nearby stations, which are usually broadcast. He arranges with a notch filter FM. Try to receive in the range of 144,500 to 146,000 MHz (ham radio) in NFM mode and tell me as they are received ...

The sound of analog TV is also broadcast in WFM mode, and can serve for testing, but not know the band plan in South Africa. In Europe goes from 470 to 860 MHz

 

[Rui]

L780S12 vsL780S09

csialv,
Thanks for all the info I going to test all info you gave me and I agree about L780S12 , I rather order from the UK

Regards
Rui

 

[Rui]

Csialv help agian

Csialv,
I hope you are keeping very well!!, I few question if a may:=

1. your connect of ar3000a to " RMT "form you computer /laptop to you scanner ?

2. if you do connect what type of software do you use and what type of cable?

3 I am using a usb to a rs232 to connect but nothing happens,even when the rmt is on

and got software for ports that not help me.


Maybe it me my connect but if have any software that works please let me know


I using AR000a with a vista 32


I hope you can help !!!

IF any member have any ideas that can help please lit me know?

Regards
Rui

 

[csialv]

Usually I connect my AR-3000A scanner to my desktop computer, but only to load new memory banks.

Formerly used the AOR "Acepac 3-A" but no longer use it because it is not compatible with the rapid current computers. I use a simple terminal communications program based on MS-DOS: TERM90 which was supplied with old Norton DOS utilities.

Any communications terminal program for making the serial port speed and configuration and be able to send txt files in ASCII mode is invalid.

The problem with USB to serial converters is know the port generated every time it connects and then configure it correctly in the program to use.

Please note, the type of programs you propose is for operation via keypad, following commands are explained at the end of the manual of the receiver.

Ah! I forgot to tell you that you need to know what is the position of intenal switch, near the internal reset button, which selects the speed of communications at 4800 or 9600 baud. My setup is COM1 serial port, 9600, 8, n, 2

 

[Rui]

Csiala rs232 cable connecting

Hi Csialv,
Is good to hear from you again, I am “trying” to uses radiomax software, how ever its does not seem to work, this what I have done.

I got a usb connector to rs232 cable then changes with software on my laptop to com1 speed I think 9600,8,n,2

I am not sure if from the top of ar3000a looking down to the rest set button if left is 4800 or right is 9600 ?

then I set the radiomax conf to com1 band 9800 8,n,2, and switch on the RMT button rear of ar 3000a on, but no connect…. Maybe there some wrong with remote unit?

I am using a dell 1525 vista

Regards

Rui

 

[csialv]

First you must make sure the serial number that is generated by connecting the USB-Serial converter is port 1. Look in hardware devices - properties.

Regarding the speed, test in both ...

The problem of FM is possible due to a bad capacitor. To identify the need for a signal injector and perhaps an oscilloscope, and a good schematic diagram of your model.

 

[Rui]

Problem of FM is possible due to a bad capacitor

Csialv,

I hope you are keeping well.. just to let you know I found the problem with FM sounding fizzy or muffy was a 1uh choke coil (SMD) that was broken, anyway it is fixed now.

Thanks
Rui

Next... I am still trying to connect with the ar3000a, this I cannot get my head round it .. If it could the cpu or rs232 chip , which I did put a new rs232 chip but nothing changed.

could it really be that handshake between the vista x32 ? and ar3000a

cheers
Rui

 

[csialv]

Thanks for the information Rui.

In reference to your problem with the serial port: do not get in any way bind the receiver with the PC?

Why suspect to be the MAX232 chip?

Got a real serial port? I mean one that meets the standard, not those Chinese converter USB to Serial.

I await your response.

 

[Rui]

Is it a real serial port ?

Good day Csialv,

Well it is a cable that connect to the usb port into my laptop and at the end of this cable is a 9 pin serial connector, then I use a adaptor to connect the 9 pin to a 25 pin for connect to ar3000a, a disc come with cable which has a driver for vista

I have install the driver which at the control panel i can choose the port normaly com1 or 2 which then I get a " error " with the RMT on.

And that where I am now

I have check the rs232 chip and it show 4.7v to [5v], however I believe it should be 10v is this correct?

Here is quote from a member

"What you have run into is the serial port (not rs232 specs) voltage probllems.It looks like your serial to radio interface cable is looking for 10v (rs232) but it looks like your usb-serial is supplying 5v(usb 5V).
I ran into this problem with my toshiba A60 which had a serial port (but checking it didn't say it met rs232 specs).It was supplying 5v not10 v required for rs232 specs.
Hope this helps,”
Ray


So this were I stand,...... can not understand it,.
Question: if the CPU was not working properly would I pick it up, due to all the frequencies are working correctly now and modes..

Thanks
Rui
Have a good summer

 

[csialv]

Try another serial interface, preferably a computer tower, not portable.

The RS232 standard requires that the low level (space) corresponds to voltages between +3 and +15 V. The high (or mark) corresponds to negative voltages between -3 to -15V.

There are several cards drivers serial ports with PCI interface for personal computers, for a low price, $ 15, you will have several serial ports in keeping with regulations.

As a last resort is to build the emulator of serial port with a source symmetric eg +12 and-12V, to deliver the proper voltage. It would take a simple circuit with a pair of transistors to convert your current tensions to +-12V.

Another option, although risky, is to communicate directly with AOR 3000A microprocessor, before MAX232, pure TTL levels, but again, it's very risky.

 

[tarekomari]

Hi.
Can you place the parts layout of the otherside.I am trying to fine IC10.
Regards
Tarek Omari.

 

[csialv]

Tarek, excuse me, but do not understand what is your question .... try again