A few sounds (the spinner and the rollover above the golden cliffs) come out as a faint click or ticking while the others are fine. Voltages are correct.

Some sounds only tick or click: the 4526 counter on the sound board

Cause: The 4526 down counter at U5 on the sound board had failed.

Checks

• With a scope or logic probe, check the counter stages that set the tone for the affected sounds.

Fix

• Replace the 4526 at U5.

Systems

• Bally MPU AS-2518-35

Games

• Paragon

Related tips

• Cheap Squeak sound board gives only faint tones and hum: failed DAC

Source: Pinball Repair help group!! (Facebook group)