Korg DSS-1 Service Manual

IPROCEDURE 5
Press Up Key (A) of Data Entry to advance Program
Number. Display shows as Fig. 17.
Fig. 17
SYSA P05: NOISE
VOICE No.1
Now it is in Noise Level Check Mode.
• Noise Level Check and Adjustment (KLM-783)
1. Connect a Noise Meter (1HF-A, -10dBm) to TP1.
(GND to TP2)
Fig. 18
2. Play any single key to confirm if the meter value is
-15dBm.
3. Adjust VR1 if necessary.
IPROCEDURE6
Press Up Key (▲) of Data Entry to advance Program
Number. Display shows as Fig. 19.
Fig. 19
SYSA P06: Offset
VOICE No.1
Now it is in DC Offset Check
• DC Offset Check (KLM-783)
1. Setting of the oscilloscope is DC, 5mV/div, 10mS/div.
2. Play C2, D2, E2, F2, G2, A2, B2, C3 in order, and confirm
waveform of Fig. 20.
Fig. 20
20mVp-p
KEY-ON KEY-OFF
Alteration of the signal at Key ON/OFF must be less
than 20mV. (With new version, Semi-Fixed VRs for ad
justing each voice will be added. VR106 ~ VR806)
IPROCEDURE 7
Press Up Key (A) of Data Entry to advance Program
Number. Display shows as Fig. 21
Fig. 21
SYSA P07: CENTER-1
VOICE No. 1
Now it is in DDL-1 Check Mode
Note:
There are two KLM-1050s for DDLs. Placed in the
left side of the panel is for DDL-1 and right side is for
DDL-2.
• DDL-1 Clock Check and Adjustment (KLM-1050)
1. Connect a Frequency Counter to TP-CLK of
KLM-1050 fixed in the left side of the panel. (GND to
TP-AG).
2. Confirm if the value is 20.0kHz.
46
3. Adjust VR3 if necessary.
4. Connect an oscilloscope (DC, 0.2V/div, 5mS/div) to
TP-EXP. (GND to TP-AG).
5. Play C4 key to confirm waveform of Fig. 22.
6. Adjust VR2 if necessary.
Fig. 22
Note:
Adjust lit line of the oscilloscope to the center and
then play C4 key to confirm center of amplitude of
the waveform is on the lit line.
Scan by Manual Manor
http://www.markglinsky.com/ManualManor.html

Korg DSS-1 Specifications

General

Brand	Korg
Model	DSS-1
Category	Synthesizer
Language	English