Yamaha CS-30 Service Manual page 36

CS-30(S/2£ 1001 —)
c. The inverse waveform of terminal C output should be obtained at terminal D ( 3 —6). Confirm that T
above is multiplied by 3.3 to 6.1 when NORMAL/TIME x 5 switch (PSW8) is at TIME x 5 position.
Also make sure that LED indicator (LE10) glows when the key is ON.
C. EG3
a. Respectively turn KBD/SEQ/EXT selector switch (PSW6) to KBD, NORMAL/TIME x 5 switch
(PSW9) to NORMAL, both DECAY TIME (PVR20) and RELEASE TIME (PSW9) levers to S and
SUSTAIN LEVEL lever (PVR21) to 0 positions. Turn ATTACK TIME lever (PVR19) until +8 ±
0.2V appears in TP5. Adjust (VRl2l so that the above rising curve is obtained from terminal E
( 3.-5) with 4 ± 0.1 mS of T when the key is ON (—7V is applied to terminal TR
( \y—
5)). Also adjust
[VRllj so that the voltage is levelled off at 0 ± 0.01V 5 seconds or later after the key is turned ON.
b. Turn ATTACK TIME lever until +3 ± 0.1V appears in TP5. Adjust VR13] to lengthen T when it
exceeds 125mS or to shorten it when it is less than that. Adjust [VR12) again so that T becomes
4 ± 0.1 mS when TP5 is +8 ± 0.1V. Repeat this adjustment until T becomes 125 ± 5mS when TP5 is
+3 ± 0.1V.
c. Make sure that T is multiplied by 3.3 to 6.1 when NORMAL/TIME x 5 switch (PSW9) is at TIME x 5
position and that LED indicator (LE11) glows when the key is ON.
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