PATLITE FV-127JP - Manual (Page 11)

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5-2-2 FG Terminal Wiring / Noise Reduction Pin
When the FG terminal is connected to earth ground, depending on the environment, the noise generated can be
reduced.
The FG hole is connected internally to the circuitry.
Even with the FG Terminal connected to earth ground, in some cases when there is no change in noise reduction,
try changing the pin positions. Depending on the work environment, noise can be reduced by changing the pin
conditions.
Both pins are inserted at time of shipment, but depending on environment, both pins may not be necessary for noise
reduction.
Noise Filter Pin A --- Connects the Analog Ground to FG
Use for Speaker Output / AUX Output Noise Filtering.
Noise Filter Pin B --- Connects the Power Ground and Input Ground to FG.
Use for Input Terminal Line Noise Filtering
※ One of the two pins are connected upon factory shipment.
※ The part number for the pin used is JM-2BK-61 [JST Mfg. Co., Ltd.].
Pull the pin in an upward direction as depicted in the drawing below when removing.
When inserting the pin, ensure it is pushed all the way down as illustrated below.
FV-127JP
Input GND
Analog GND
FG
Terminal
Noise Filter Pin A
Noise Filter Pin B
FG