Korg DSS-1 Service Manual

ITEST DATA DISK
For testing DSS-1, load test data from this disk at first
and make it according to following procdure. When data
is loaded, display shows as Fig. 8.
Fig. 8
F1 SYS: A Completed
Select (1-9):
I PROCEDURE!
1. Press System Sw. (LED becomes lit) to call test pro
gram. Display shows as Fig. 9.
Fig. 9
SYSAP01: VCA1-R1
VOICE No.1
Now it is in OSC 1 Level Check Mode
• OSC 1 Level Check and Adjustment (KLM-783)
1. Connect an oscilloscope (DC, 0.1 V/div., 0.5mS/div) to
TP2 (IC15 7 pin). (GND to TP1)
Note:
While checking KLM-783, connect an oscilloscope
as above unless specified.
Fig. 10
0.5Vp-p
3. Adjust VR101 if necessary.
4. Repeat above 2), 3) to check Voice 2 — Voice 8 and
adjust VR201 — VR801 if necessary.
5. Among the 8 voices, difference of Max. and Min.
value must be less than 40mVp-p.
2. Play C4 key to confirm waveform of Fig. 10.
■ PROCEDURE 2.
Press up key (A) of Data Entry to advance program
number. Display shows as Fig. 11.
Fig. 11
SYSA P02: VCA2-R5
VOICE No.1
Now it is in OSC 2 Level Check Mode
• OSC 2 Level Check and Adjustment (KLM-783)
1. Play C4 key to confirm waveform of Fig. 12 (Fig. 10)
2. Adjust VR105 if necessary.
3. Repeat above 1, 2 to check Voice 2 — Voice 8 and
adjust VR205 — VR805 if necessary.
4. Among the 8 voices, difference between Max. and
Min. value must be less than 40mVp-p.
44
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Korg DSS-1 Specifications

General

Brand	Korg
Model	DSS-1
Category	Synthesizer
Language	English