YORKVILLE NX720S Service Manual page 7

M1330.PCB_DATABASE_HISTORY
MODEL(S):-
NX720S
# DATE VER# DESCRIPTION OF CHANGE
1 MAY 2006 1.00 MADE FROM NX750P M1231 V2.00 IN MAY 2006
2 D V M1231 HAD BEEN FULLY FORCE UPDATED ON MAY 2005
3 D V MAY 2006 FORCE UPDATED ALL COMPONENTS MODIFIED
4 D V WITH IN THE LAST YEAR USING TONY'S LIST. MR.
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
M1330 PENDING CHANGES
MODEL(S):-
NX720S
# PC# PENDING CHANGE
1 PC X
2 PC X
3 PC X
4 PC X
5 PC X
6 PC X
7 PC X
8 PC X
9 PC X
10 PC X
11 PC X
12 PC X
13 PC X
*PLACE IMPLEMENTED CHANGES INTO BOARD HISTORY
POT LIST
NX720S
MODEL(S):-
REF FUNCTION PART# KNOB {NEW}
P1 MAIN GAIN #4434 GREY #9916
P3 LOW PASS ADJ #4436 RED #9915
P4 BOOST ADJ #4434 GREEN #9917
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
R F P K N
R F P K N
R F P K N
R F P K N
INDICATES THERE IS GROUND CONNECTION UNDER SYMBOL
BETWEEN TWO DIFFERENT NETS. DON'T REMOVE.
SEE LAYOUT DIAGRAM
PRODUCTION NOTES
1. NOTE THAT THIER IS SEVERAL LINES ON THE DSBOTMASK LAYER.
THESE MAY BE USED FOR MARCONI TEST POINTS SO HAVE THIS LAYER
ON IF DOING ANY MODIFICATIONS.
2. MAKE SURE TO RTV ALL LARGE CAPACITORS TO SOMETHING CLOSE
3. C124 IS A FIXED DO NOT STUFF PART. CAN BE DELETED NEXT REVISION.
**************IMPORTANT******************
4. ADD AMPLE RTV UNDER ENTIRE BASE OF OUTPUT COIL L1
5. LEADS FOR 5 WATT RESISTORS MUST BE BENT ON THE MACHINE
LEAD LOOP MUST NOT BE ABOVE TOP OF RESISTOR
5 WATT
J109 BC550C
BC560C
2N5638
C B E
D S G
TO-92 TO-92 "STYLE_P32"
BD139
2N5401
BD140
IRFP9140N 2N5551
BD237
IRFP23N50L BD238 MPSA06
BDX54B-54C MJE270
MPSA13
MJE271
BDX53B-53C
MPSA43
MJE340
MPSA56
MJE350
MPSA63
MPSA92
G D S
E B C
B C E E C B
TO-247 TO-220 TO-126 TO-92
REWORK ON M1330
1. BOTTOM SIDE
ADD A #5194, 470P 100V SERIES
WITH A #4703 2R 2 W.
2. TOP SIDE
ADD A #5209, 4N7 250V BETWEEN
U9 PIN 5 AND C1 PIN1.
3. TOP SIDE
REMOVE R52 #4769 1K4 PIN 2
AND ADD A #5961 33U 16V IN SERIES.
4. TOP SIDE
DO SOLDER TOP OF THE
TAB W13 AND W17.
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