Advertisement
GX-1
(S#
5030~
K S
Circuit Board, Adjustment and Wiring
ee
ae
Tuning Congoi
(for Portame@nto Key)
EL Ao clorL robe ao
©
C
Uo? w/o]
f e
e,
ef
6
a
O
;
9
©
"SK KEY Voltage L
Ground
Voltage
Correction
Circuit
Wirings
K
Ss
No. |Termin al pda
Direction
No. | Terminal | Sle .
Direction
Terminal
ae
Direction
33|
AZ | SB|SK-A}
73|
F§ | VI | SK-F§
31}
As | GG|SK-A;
1)
<F 5 | BEESK-F ;
1.Ladder ground potential adjustment -- VR6
29)
G3 | WH)
SK-Gi
my
Es | Ghee.
Adjust for +0.1mV between terminal E2 (3) and the ladder net-
27) Gs | GY | SK-G;
67| Dé | YE|SK-D§
work ground point.
25|
F3 | vi | SK-F3
65
Ds | OR|SK-D;
2.
SK tuning (2.0V) adjustment --VR1
23;
F; | BE|SK-F;
63|
C § | RE|
SK-C§
Note: Set the tuning lever at center position.
21|
E; | GR|SK-E;
61|
C; | BR|SK-C;
Adjust for
es
at the TP (86) terminal
(this may vary slightly
19]
D ? | YE|SK-D?
591
B, | PK|
SK-B,
due to tuning).
¢
2
3.
SK voltage output amp offset adjustment -- VR3
.
=
=
alte
aoe
Conditions:Done while turning on C6 key.
15}
C3 | RE|SK-C;3
55|
A. | GG|SK-A,
Adjust for 2.000V at the O (9) terminal.
13}
C3 | BR|SK-C;
53
§ | WH|
SK-G?
4. 0.25V adjustment --VR2
12| —15 | GY | SK-L
51] Gs | GY SK-G,
Conditions:
Done while turning on C3 key.
S|
G | REI §s-cee
49|
F i | VI | SK-Fi
87,
T | VI | PN8-@
Adjust for 0.25V at the O (9) terminal.
8|
+15 | RE | sk-TR3
47;
F, | BE| SK-F,
86)
TP
5.
Portamento key voltage adjustment.
7|
Kz | BR|
SS-KEY(0
46]
E, | GR|SK-E,
85|
C. | BR|SK-C,
"C3 key adjustment - VR4
6 ) P, | RE por-1
43
D i | YE SK-Di
83/ C; | PK|SK-Bs
Carry out tuning comparing with the SK C3 key.
5|
P> | OR|
POR-3
"|
D. | oR SK-D,
811
A? | SB|SK-A?
Ref.:
Approximately —3.0V
should
be at the
P,
(6) terminal.
41
E,
|,BL,| Sk2-c6-¢
39
;
SK-C?
701
A
:
*
C6 key adjustment -- VR5
122) RA-E
« | RE
'
s | GG|
SK-A;
Tune while comparing with SK C6 key.
_i
as
ee
pee
eee
77|
Gé | WH|
SK-G3
Ref.:
Approximately 0.0V should be at P2 (5) terminal.
2)
E:
ie
RA-E
35|
Bs | PK| SK-B;
15)
Gs | GY | SK-Gs
Advertisement
