MARK LEVINSON NO25
Instrukcja Obsługi

Internal adjustments: cartridge loading

The high-gain and low-gain phono options offer internally selectable cartridge loading via two four-pole miniature rocker switches, one for each channel. The high-gain and low-gain options have been factoryadjusted at 825� and 47K�, respectively. If you wish to change the factory-adjusted cartridge loading, see "Making the internal adjustments;" refer to the table below for the proper switch positions for each load setting.

Cartridge loading settings (high-gain option)

Switch #1 #2 #3 #4

30� Off Off On Off

100� Off On Off Off

825� On Off Off Off

10K� Off Off Off Off

Optional Off Off Off On

Cartridge loading settings (low-gain option)

Switch #1 #2 #3 #4

825� Off Off On Off

10K� Off On Off Off

22K� On Off Off Off

47K� Off Off Off Off

Optional Off Off Off On

Internal adjustments: optional load terminals

Resistance values other than those listed above can be accommodated via the optional load terminals. Load resistors can be inserted into these terminals, allowing virtually any load desired.

Terminating the optional load

Solder

Optional load component

Solder

PC board
See "Making the internal adjustments;" refer to the "Cartridge loading settings" tables for the proper switch positions for the optional load. Because the inherent input resistance (all switches off) is in parallel with the optional load terminals, use this formula to calculate the actual resistor needed: R = 1/ (1/RD - X) RD = Desired resistance in ohms X = 0.00002 for Low-gain Phono Option, 0.0001 for High-gain Phono Option Note: We recommend precision metal-film resistors; see your Mark Levinson dealer.

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