YORKVILLE YBA300, Service Manual

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11 11
10 10
9 9
8 8
7 7
6 6
5 5
4 4
3 3
2 2
1 1
A
A
B
B
C
C
D
D
E
E
F
F
G
G
H
H
I
I
J
J
K
K
L
L
M
M
N
N
O
O
P
P
Q
Q
of
Filename:
PCB# Sheet 2 2
Product
Date: Rev: YsType:YsType
M1301V04sch.sch2006
M1301
Tue Apr 19, 2016
NOTES
V04
YBA300
MC33078
12AU7
6840_PC
"STYLE_P32"
REF KNOB PART#
MODEL(S):-
FUNCTION
R
R
R
R
R
R
F
F
F
F
F
F
K
K
K
K
K
8430
8430
K
8430
8430
8430
8430
P
P
P
P
P
P
N
N
N
N
N
N
N
N
N
N
N
{NEW}
N
M1301 POTLIST
YBA300
P3 GAIN 4425
P1 BASS 4424
P5 MID 4424
P4 FREQ 4466
P2 TREBLE 4424
P6 MASTER 4424
1
3
4
5
7
2 8
9
6
12AX7A
"STYLE_P34"
13
10
7
4
1
9
11
12
8
#
2
3
5
6
VER#
MODEL(S):-
DATE DESCRIPTION OF CHANGE
V
V03
.
1.00p3
1.00p1
.
2.00
1.00
.
.
1.00p2
D
12-JULY-2011
2011/01/05
2010/10/13
2010/02/02
N
PC8294: Add W3 and GRN wire to chassis. GG
Deleted 'Polarized' attribute from C22
Change input link to #2345 connectors with 3056 cable.
All new layout.
.
2011/04/06
2010/12/10
.
.
2010/09/10
Added two 100N caps C38 and C39
Revised per PC# 8247
Final proto and first run build.
Moved some XH connectors to make them accessible
Add shield to switch pcb. Move DI switch to back.
Value changes for sound tweaks. Change x-f to connector.
YBA300
M1301.PCB_DATABASE_HISTORY
PC8303: USE ONLY MC33078 FOR #6840 GG . 12-OCT-2011
19-APR-2016 V04 PC8472: Add C40, C41. Double sided No eyelets
12
9
6
3
13
10
11
7
4
1
2
5
8
V
V
V
V
V
V
V
V
V
V
V
V
V
D
D
D
D
N
N
N
N
D
D
D
D
D
D
D
D
D
N
N
N
N
N
N
N
N
N