HP E2050A Gateway | Can't Reset to Default - Page 1
Forum section: electronics / testgear

author: Venturi962
author_rank: Regular Contributor
timestamp: April 21, 2021, 09:43:59 pm
content: Recently acquired an HP E2050A off eBay, but can't seem to have the device reset to default settings.Have tried combinations / lengths of holding the 'Config Preset' button while powering on but doesn't seem to have any effect. Based on the manual, expect to see the 'Conn' LED flash after this but no such luck.GPIB | SRQ LED remains on all the time which doesn't seem to be expected. Fault LED doesn't come up either. Anyone run into this?

author: Algoma
author_rank: Frequent Contributor
timestamp: April 22, 2021, 01:08:33 am
content: https://www.eevblog.com/forum/testgear/hp-e2050a-mini-teardown/gslick responds with some details on how to reset the unit from the console:Quote

author: Venturi962
author_rank: Regular Contributor
timestamp: April 22, 2021, 02:30:38 am
content: Thanks - did see that and no result either. Don't quite understand why the SRQ LED is on without any device plugged in as I believe that is reserved for devices. Also seems that SRQ is actually idle, measures 5V on the GPIB Controller (SMJ9914A).

author: gslick
author_rank: Frequent Contributor
timestamp: April 22, 2021, 06:02:26 pm
content: During power up of my E2050A the front panel LEDs briefly turn on in a few different patterns. After less than 10 seconds with nothing connected to the HP-IB / GPIB and LAN connectors the only LED that remains on is the Power LED.If the SRQ LED remains on with your E2050A with nothing connected to the HP-IB / GPIB connector and you cannot get any response on the serial port with a null modem cable connection at 19200 baud, 8 bit, no parity, then maybe your E2050A has a hardware fault. If you just acquired it off of eBay, it might not be too surprising if it turns out to be dead.Serial port output at 19200,N,8,1 after sending a CR to the E2050A after power up:Code:Welcome to the E2050A LAN/HP-IB Gateway configuration utility.Commands? Show additional commandsexit, quit Exit WITHOUT saving configuration changesreboot Save configuration changes and restartstatus Show the LAN/HP-IB Gateway connection statusConfiguration Parametershostname: E2050 # Internet domain namehardware-addr: 0800091AEE6E # Ethernet station addressip: 192.168.1.20 # Internet Protocol addressdefault-gw: 192.168.1.1 # Default subnet gateway IP addresssubnet-mask: 255.255.255.0 # Network subnet masksyslog-svr: 0.0.0.0 # Syslog server IP addressbootp: OFF # Obtain config via BOOTP/TFTPlan-timeout: 0 # LAN connect timeout in secondsio-timeout: 120 # Server I/O timeout in secondsallow: * # IP allow listhpib-address: 21 # HP-IB System Controller Addresshpib-name: gpib0 # HP-IB interface symbolic namehpib-unit: 7 # HP-IB logical unit number> ?Available commands are:allow: <ip> [<ip>] Set the allow list for IP securitybootp: <ON|OFF> Turn ON or OFF use of BOOTP/TFTPbye Quit without saving configuration - see rebootconfig Show current settingsdefault-gw: <ip address> Set the default subnet gateway addressexit Exit without saving configuration - see rebootfactory-reset Reset configuration to factory defaults and reboothardware-addr Display the ethernet station addresshelp Print help informationhostname: <string*35> Set the internet domain namehpib-address: <0-30> Set the HP-IB system controller addresshpib-name: <string*15> Set the HP-IB interface symbolic namehpib-unit: <1-255> Set the HP-IB logical unit numberio-timeout: <seconds> Set the server I/O timeout in seconds. 0 is Off.ip: <ip address> Set the IP addresslan-timeout: <seconds> Set the LAN connect timeout in seconds. 0 is Off.quit Quit without saving configuration - see rebootreboot Save configuration and restartstatus Show the LAN/HP-IB Gateway connection statussubnet-mask: <mask> Set the network subnet masksyslog-clear Clear the syslogsyslog-display Display the syslog contentssyslog-svr: <ip address> Set the syslog server addressversion Show the firmware revision> versionSoftware revision A.01.03Bootrom revision A.01.00

author: gslick
author_rank: Frequent Contributor
timestamp: April 22, 2021, 06:16:55 pm
content: If you bought this one, unfortunately you might be out of luck:https://www.ebay.com/itm/164773841521Quote

author: Venturi962
author_rank: Regular Contributor
timestamp: April 22, 2021, 07:21:05 pm
content: Thanks gslick - good thing I didn't pay seller's full price. Looks like I got a paperweight.

author: Tomorokoshi
author_rank: Super Contributor
timestamp: March 23, 2022, 01:18:40 am
content: I have the same problem with one E2050A. I have another that works. Here is the timing of the indicator light sequence:TimeWorkingNot Working0.0Power OnPower On1.0Power, Fault, Conn, Talk, Listen, SRQPower, Fault, Conn, Talk, Listen, SRQ2.0Power, SRQPower, SRQ2.1Power, Listen, SRQPower, SRQ2.2Power, ListenPower, SRQ3.0Power, Talk, Listen, SRQPower, SRQ3.1Power, Talk, SRQPower, SRQ3.2PowerPower, SRQ4.5Power, Tx, RxPower, SRQ4.6PowerPower, SRQ4.7Power, Tx, RxPower, SRQ4.8PowerPower, SRQIt seems that from around 1 second after power on to around 3 seconds it is testing the GPIB controller. The failed unit stops somewhere in the SRQ part of the test. Probing on the 68360 processor, it seems to get a /BERR (Bus Error). Other lines have activity consistent with /BERR being asserted.