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7. ADJUSTMENT PROCEDURE
N. B.
This product is perfectly adjusted in the factory before
the shipment.
Do not touch the trimmer unless repair or further adjust¬
ment is required.
D/A, A/D OFFSET ADJUSTMENT (KLM-840)
1. SETTING
INPUT LEVEL
OUTPUT LEVEL
PATTERN
TIME
INTERNAL
TEST SW
0
*
*
*
T
(NOTE)
T
; TEST MODE
N ; NORMAL MODE
*
; Free setting
2. ADJUSTMENT PROCEDURE
1) Connect an oscilloscope (DC 0.5v/div, 2pis/div) to TP1
on the KLM-840. Both GNDs have to be also connected.
2) Confirm whether the waveform on the oscilloscope is
the good shape or not referring to the chart below.
3) In case it does not show any regular waveform, please
adjust with VR3.
Fig-1
NOTE:
Trigger from TP2 (IC9 PIN 9) will be synchronized on the
oscilloscope by connecting to its EXT TRIG IN, and
which simplify the measurement of the waveforms.
If it is not properly adjusted, noises may occur in changing
the LONG ON.
— 13
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