15-07-2025, 08:25 PM
I opened it up today and found the board with the backup battery. A 2.4V 90mA NiCad and very dead. About 0.2V. There are some rough equivalents available at a price but it's going to get a pair of AAA NiMH cells for now and probably forever. Soldering to ordinary cells isn't very good for them but it's OK if done swiftly.
Calibration will be lost but within reason I don't care.
The service manual that Nick found (and is on the Agilent website) is not the right one for my instrument. Mine has a serial number starting 2904J while the manual is for 2738J. The board I'm working on (CPU and memory) looks totally different to the drawings in the manual. The CPU is a 68000 in a huge DIL package.
Calibration will be lost but within reason I don't care.
The service manual that Nick found (and is on the Agilent website) is not the right one for my instrument. Mine has a serial number starting 2904J while the manual is for 2738J. The board I'm working on (CPU and memory) looks totally different to the drawings in the manual. The CPU is a 68000 in a huge DIL package.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
