YORKVILLE TRAYNOR YCS50 Service Manual page 14

M1294
MODEL(S):-
YCS50/90
# DATE VER# DESCRIPTION OF CHANGE
1 2007/02/08 1.00 PC#7287, replace input eyelets with RCA jacks #6541
2 . . PC#7298, Change R94 from 180k to 82k, #4837 and
3 . . Change R91 from 47R to 33R, #4816
4 . . PC#7336, CHANGE R74 FROM 47K,#4834 TO 120K, #4851
5 . 1.01 CHANGE R98 FROM 2K2, #4847 TO 4K7,#4827
6 . . CHANGE R100 FROM 27K, #4833 TO 33K, #4840
7 . . CUT R91 CONNECTION AND RECONNECT IT TO W30 P4
8 2007/12/10 2.00 REVISED BOARD PER PC#7333
9 . . PC#7446, ONLY FOR YCS90, T&R WILL REMOVE TWO
10 . . RESISTORS, R256 AND R257.
11 D V N
12 D V N
13 D V N
1 D V N
2 D V N
3 D V N
4 D V N
5 D V N
6 D V N
7 D V N
8 D V N
9 D V N
10 D V N
11 D V N
12 D V N
13 D V N
M1294 DRILL HISTORY
MODEL(S):-
YCS50/90
# DATE VER# DESCRIPTION OF CHANGE
1 2007/08/08 1.00 RELEASED FOR PRODUCTION
2 2007/12/10 2.00 REVISED BOARD PER PC#7333
3 D V N
4 D V N
5 D V N
6 D V N
SEE LAYOUT DIAGRAM
Potlist
YCS50/90
MODEL(S):-
REF FUNCTION PART# KNOB {NEW}
P1 TREBLE 4424 8431 N
P2 BASS 4425 8431 N
P3 MID 4423 8431 N
P4 CL GAIN 4425 8431 N
P5 OD GAIN 4425 8431 N
P6 TREBLE 4424 8431 N
P7 BASS 4425 8431 N
P8 MID 4423 8431 N
P9 OD VOLUME 4425 8431 N
P10 Resonance 4425 8431 N
P11 MASTER VOLUME 4423 8431 N
P12 Send Level 4417 8431 N
P13 FX Ret 1 4423 8431 N
P14 Presence 4423 8431 N
P15 REVERB1 4423 8431 N
P16 CL VOLUME 4425 8431 N
P17 REVERB2 4423 8431 N
P18 FX Ret 2 4423 8431 N
P19 BOOST LEVEL 4425 8431 N
R F P K N
R F P K N
R F P K N
R F P K N
R F P K N
PIN CONFIGURATION
2N5401
2N5551
MPSA06
MPSA13
MPSA43
BC550C J109
MPSA56
BC560C
2N5638
MPSA63
C B E
E B C D S G
TO-92 TO-92 TO-92 "STYLE_P32"
H
H 1P
5
4 6
2K 1G
1
+V 8
3 7
A
2
7
B
2G 2 8 1K
3
6
1 9
4 -V
5
2P HT
6882_PC
12AX7A
"STYLE_P28"
G2 G1
4 5
P NC
3 6
H H
2 7
1 8
K
NC
G3
5881WXT