Layout-m1237-k2-kbamp 2/2, See layout diagram, Pcbsa: do not break out board before testing – Yorkville Sound YS1044 User Manual
Page 9
NE5532N
MC33078P
MC33079P
SEE LAYOUT DIAGRAM
LEAD/PIN REFERENCE
4- AI, DO NOT STUFF R174 AND R175.
3- C167, B.A. WILL PUT A 220N #5600 INSTEAD OF 22N.
2- ADD RTV TO ALL CAPACITORS.
1- ADD THERMAL JOINT COMPOUND (GOOP)
BETWEEN Q9 AND Q13;
Q10 AND Q11 COVER WITH VINYL CAP (8609) AND RTV.
M1237 PRODUCTION NOTES
5- Q15 & Q16 ( #6787 & #6788 ) DON'T NEED ANY THERMO PAD OR SILICON
JUST PUT SOME THERMO CONDUCTIVE COMPOUND (WHITE GREASE).
E
B
C
TO-126
MJE350
MJE340
MJE271
BD237
BD238
BD139
MJE270
BD140
C
E
B
BC560C
BC550C
TO-92
D
G
S
2N5638
TO-92
MPSA56
MPSA06
MPSA63
2N5551
2N5401
MPSA43
E B C
TO-92
2G
2K
1
9
1K
1G
4
H
6
2
3
H
8
7
2P
5
HT
1P
12AX7A
5
2
#
6
3
4
1
DATE
MODEL(S):-
VER#
DESCRIPTION OF CHANGE
D
D
V
V
N
N
D
D
D
D
V
V
V
V
N
N
N
N
K2
M1237-02 DRILL HISTORY
4
1
6
5
3
#
2
MODEL(S):-
PC#
*PLACE IMPLEMENTED CHANGES INTO BOARD HISTORY
PENDING CHANGE
X
X
X
X
X
X
PC
PC
PC
PC
PC
PC
K2
M1237-02 PENDING CHANGES
11
8
5
2
12
9
6
13
10
7
3
4
1
D
D
D
D
V
V
V
V
N
N
N
N
D
D
D
D
D
D
D
D
D
V
V
V
V
V
V
V
V
V
N
N
N
N
N
N
N
N
N
12
9
6
3
#
13
11
10
5
4
8
7
2
1
DATE
MODEL(S):-
VER#
DESCRIPTION OF CHANGE
V
V
D
D
K2
V1.00
V2.00
FEB-27-2006
JULY-2006
#6860 OPTO-COUPLER REPLACED WITH NEW CIRCIUT
M1237-02.PCB_DATABASE_HISTORY
V1.01
.
PC#7089:AH:R44 4829 10K --> 4639 4K99, R48 10K 4829 -->
.
4K99 4639, R130 20K 4885 --> 4838 100K,CHANGE HPF FRQ
APR-07-2006
FIRST RELEASE:PC#7086 R52 #4840 33K->#4838 100K
N
N
V3.00
MAR-2007
PC7213: CHANGE, ADD AND DELETE FEW PARTS
.
.
.
.
.
PC#7217, REPLACE C167 22N #6435 WITH 220N #5600
.
JUN-24-2008
PC#7277, CE VERSION USE FUSE T3.15A #2475
PC#7292, REMOVE RESISTORS, R174 AND R175
PC#7592, NEW #6787 & #6788 NEED NO THERMO PAD
.
JAN-27-2009 .
PC#7695, REPLACED J11 PART 3445 WITH 3845
OCT-22-2009 V4.00
PC#7759: MODIFY TRACE AREA, FORCE UPDATE
FUNCTION
KNOB
REF
MODEL(S):-
PART#
P2
S3
R
P9
P8
P4
P6
P7
P10
P1
P3
P5
MONITOR GAIN
VOICING SW
F
MID
TREBLE
MASTER
MID
TREBLE
BASS
CH-1 GAIN
CH-2 GAIN
BASS
4454
3393
P
4453
4453
4452
4453
4453
4453
4452
4452
4453
N
N
N
N
N
N
N
N
N
N
N
N
9922
8400
K
8399
8399
8399
8399
8399
8399
8399
8399
8399
{NEW}
POT LIST
K2
6- PCBSA: DO NOT BREAK OUT BOARD BEFORE TESTING.