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AFG5101: Difference between revisions
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Added extra info.
Jaredcabot (talk | contribs) (Added PCB photos.) |
Jaredcabot (talk | contribs) (Added extra info.) |
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==Options== | ==Options== | ||
* Option 02: Frequency locked synthesizer for enhanced frequency stability | * Option 02: Frequency locked synthesizer for enhanced frequency stability | ||
==Internals== | |||
The backplane connectors use in this unit are DIN41612, or Eurocard connectors. The required extender cables can be easily made up using these connectors with ribbon cable to allow for adjustment and calibration. | |||
The front display uses a blue electroluminescent panel for backlighting, which is usually almost completely faded and dim by now, and the LCD contrast is usually quite poor too.<br> | |||
A standard cheap 5-volt Hitachi chipset compatible LCD module with 'parallel' interface can be used as a direct drop-in replacement, with the only modifications needed being the removal of the EL inverter from the rear of the front panel PCB, and the LED backlight to be wired to the supply side of the now-removed EL inverter. | |||
The RAM backup battery is another common point of failure, this was originally a Renata 125-1 3-volt primary cell in a potted enclosure with two diodes. | |||
A replacement can be replicated using a CR2032 cell and two 1N4148 diodes as used in the original part. See images below for the schematic of the original Renata part. | |||
==Pictures == | ==Pictures == | ||
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AFG5101_A3_Analog_Circuit_Board.jpg|A3 Analog Circuit Board | AFG5101_A3_Analog_Circuit_Board.jpg|A3 Analog Circuit Board | ||
AFG5101_A4_Output_Circuit_Board.jpg|A4 Output Circuit Board | AFG5101_A4_Output_Circuit_Board.jpg|A4 Output Circuit Board | ||
Renata_125-1_Schematic.png|Schematic of Renata 125-1 RAM backup battery | |||
</gallery> | </gallery> | ||