Spare Parts - Kenwood TS-900 Operating Manual

6.14 AUDIO AMPLIFIER BIASING CURRENT
Remove the jumper between TP4 and the GND terminals
on the AF board and replace it with a DC ammeter (0O—0.3
amps). VR2 on the AF board (see Figure 26) should be
adjusted for an idling current of 50 ma. When finished,
replace the jumper.
CAUTION
Excessive current can damage the AF amplifier.
6.15 CLEANING the DIAL SCALE
Do not use chemicals to clean the dial scale because they
will disolve the dye on the plastic scale. Usually warm water
works well for removing dust or dirt.
6.16 ORDERING SPARE PARTS
When ordering replacement or spare parts for your equip-
ment, be sure to specify the following information:
Model number and serial number of the equipment —
Schematic number of the part — and the board number
on which the part is located.
Should it ever be necessary to return the equipment for
repair be sure to pack it very carefully and include a full
description of the problems involved,
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