FG502/Repairs

• Helitrim potentiometers are prone to failure due to a cracking plastic axle.
• Failed (Tantalum) electrolytic capacitors, especially on the output transistors.
• FG502 repair report @ amplifier.cd (German)
• FG502 repair report @ amplifier.cd (English Translation)
• The Tektronix Function Generator Teardown - Paul Rako @ electronicdesign.com
• For serial numbers below B050740, some FG502s may not shift Output Frequency 1000:1 with 10 V or less as specified. To correct this problem, change R125 from 10 kΩ to 9.41 kΩ.