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Agilent E7495 linux root account
kirill_ka:
Good. If you'd be so kind to grab the firmware, the programming header (2mm pitch) pinout is as follows:
1. PGD (PIC pin 17)
2. PGC (PIC pin 16)
4. MCLR (PIC pin 18)
6. VDD (PIC pin 7)
8. VSS (PIC pin 6)
Please, double check the connections before trying.
In my E7495A PIC pin 17 is connected to the header through 10K resistor, so I had to connect the PICkit to the pin 17 directly.
Other than that I had no problems reading the firmware with the board powered off.
9aplus:
Locally can find only:
"
Vellman VM203
PICKit™2 Development Programmer is very versatile.
It features on board sockets for many types of PIC® microcontrollers.
Also provided is an ICSP connector, to program your onboard device.
https://www.velleman.eu/downloads/0/modules/usermanual_vm203.pdf
"
On A4A4 ISCP is marked like "PIC PGM PORT J55"
Do you know the layout?
Or you have some tool to clamp on PIC 16F877 directly ?
Do you have any picture how did you manage to read out that PIC ???
kirill_ka:
--- Quote from: 9aplus on November 24, 2018, 08:25:41 am ---Locally can find only:
"
Vellman VM203
PICKit™2 Development Programmer is very versatile.
It features on board sockets for many types of PIC® microcontrollers.
Also provided is an ICSP connector, to program your onboard device.
https://www.velleman.eu/downloads/0/modules/usermanual_vm203.pdf
"
--- End quote ---
It should work. However, if it's becoming too complex, please, don't waste your time on this.
--- Quote from: 9aplus on November 24, 2018, 08:25:41 am ---On A4A4 ISCP is marked like "PIC PGM PORT J55"
Do you know the layout?
--- End quote ---
Yes, I noted it above. 1. 2. 4. 6. 8. are the pin numbers of J55.
--- Quote from: 9aplus on November 24, 2018, 08:25:41 am ---Or you have some tool to clamp on PIC 16F877 directly ?
--- End quote ---
No.
--- Quote from: 9aplus on November 24, 2018, 08:25:41 am ---Do you have any picture how did you manage to read out that PIC ???
--- End quote ---
Unfortunately no, my unit is assembled already. I made an adapter to connect PICkit 3 to the J55. Then I cut the trace going to J55 pin 1 and added a bodge wire to connect J55 pin 1 directly to the pin 17 of PIC. That's because I wanted to program it many times. If you do it once, you may just solder wires directly to the pins of PIC16 (U201).
9aplus:
@kirill ok on all
It seems that my unit will remain open for some time ;)
After reassembly
Power on, green LED ON, no sign on LCD screen, after couple of seconds green LED off
tested on internal BAT and external PS
It seems that some voltages are missing...
The puzzle is that initially with blown tantalum, unit was able to blink LCD powered from BAT...
Possible that I mix some interconnections, but I followed instructions from bellow DOC.
All ideas or experience is more than welcome.
Regarding documentation have only:
Service Guide
Agilent Technologies E7495A/B
Base Station Test Set
Any other available?
To be continued...
9aplus:
UPDATE:
For sure some voltage was missing, on recheck have find out one grey wire set
routing from A4A4 to CPU A4A1 board not fitted properly.
Now all good.
Unit boot OK
Just must finish assembly to perform proper test
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