Korg DSS-1 - Test Procedures (DDL Checks)

IPROCEDURE3
Press Up Key (▲) of Data Entry to advance program
number. Display shows as Fig. 13.
Fig. 13
SYSA P03: VCF0-R3
VOICE No.1
Now it is in VCF fo Check Mode.
• VCF fo level check and Adjustment (KLM-783)
1. Play C4 key and confirm waveform of Fig. 14 (Voice
1)
Fig. 14
0.4 - 0.45V!
\
Note:
The point of the widest amplitude of the waveform is
for adjustment. However as the point of each voice
is not completely same, select one point of a voice
as a standard adjusting point and adjust other 7
voices with it.
4. Among the 8 voices, difference between Max. and
Min. value must be less than 40mVp-p.
5. Play C6 key to confirm if level is as Fig. 14 (Voice 1).
(Frequency is about 4 times as much)
6. Adjust VR102 if necessary.
7. Repeat above 5, 6 to check Voice 2 — Voice 8 and
adjust VR202 — VR802 if necessary.
8. Among the 8 voices, difference between Max. and
Min. value must be less than 40mVp-p.
2. Adjust VR103 if necessary.
3. Repeat above 1, 2 to check Voice 2 — Voice 8 and
adjust VR203 - VR803 if necessary.
IPROCEDURE 4
Press Up Key (A) of Data Entry to advance Program
Number. Display shows as Fig. 15.
Fig. 15
SYSA P04: RES0-R4
VOICE No.1
Now It is In Resonance Check Mode.
• Resonance Check and Adjustment (KLM-783)
1. Play C4 key to confirm waveform as Fig. 16 (Voice 1)
Fig. 16
DC, 0.1V/div,
1mS/div
2. Confirm if the value of the envelope of resonance
oscillation waveform is 2mS. Adjust VR104 if
necessary.
3. Repeat above 1, 2 to check Voice 2 — Voice 8. Ad
just VR204 — VR804 if necessary.
4. Also confirm if there is no irregular oscillation in each
voice.
2mS
45
Scan by Manual Manor
http://www.markglinsky.com/ManualManor.html