©2001 Marchand Electronics Inc. PO Box 473 Webster NY 14580 (585)872 0980 www.marchandelec.com
11
Q18** IRFI9640
P-Channel Power MOSFET
*Q1,Q2 come as a matched pair
**Q17 & Q18 8 places each matchesd sets
Q9,Q11,Q12,Q13 need heatsink
The MB401 main board kit contains the
following parts:
Qu.
Value
Description
Resistors
16
49.9 Ohm
1%, 1/4W, Metal Film
3
100 Ohm
1%, 1/4W, Metal Film
4
499 Ohm
1%, 1/4W, Metal Film
19
2.00K
1%, 1/4W, Metal Film
2
10.0K
1%, 1/4W, Metal Film
2
24.9K
1%, 1/4W, Metal Film
3
100K
1%, 1/4W, Metal Film
5
1.00M
1% ,1/4W, Metal Film
1
100 Ohm
Trim Pot, 10 turn
1
10 KOhm
Trim Pot, 10 turn
16
1.0 Ohm
5W Wirewound
Capacitors
2
1.0uF
Stacked Film
2
1pF
NPO Ceramic
1
1000 pF
Ceramic Disk
1
0.22uf.
Stacked Film
2
4.7uf, 250v Aluminum Electrolytic, R
2
47uf, 100v
Aluminum Electrolytic, R
4
6800uf, 6.3v Aluminum Electrolytic, R
8
2200uf, 80v Aluminum Electrolytic, SF
R: radial
SF: snapfit
Diodes
4
1N4735
6.2 Volt Zener Diode
6
1N4148
Signal Diode
2
HER106
High Efficiency Diode
1
LED
Transistors
1 pair ZVNL120A
N-Channel SS MOSFET
3
ZVNL120A
N-Channel SS MOSFET
2
ZVP2120A
P-Channel SS MOSFET
2
IRF710
N-Channel MOSFET
2
MTP2P50E P-Channel MOSFET
9*
IRFI640
N-Channel Power MOSFET
8*
IRFI9640
P-Channel Power MOSFET
1
2N2222
NPN transistor
1
2N2907
PNP transistor
*
Matched sets of power transistors
Mechanical
Quantity
Description
2
3 Pos. Terminal block Blue
1
3 Pos. Terminal block Black
1
4 Pos. Terminal block Black
17
4/40x3/4” Machine Screw
17
4/40 Nut
17
#4 flat washer
34
#4 split lockwasher
1
Heat Sink Bracket
2
TO220 heatsink, TALL
1
Bag Heat Sink Compound
1
MB401 circuit board
2
testpoint
Assembly Instructions
Most parts are installed in the usual way. Insert the
part at the location on the circuit board as indicated by
the silk screen identification and solder on the solder
side of the board. Start with installing smaller parts
and install large parts last. This makes installation
easiest. The circuit board has plated through holes, so
parts need only be soldered on the solder side of the
board.
Resistors
: The 1% metal film resistors are identified
with colored bands in the usual way. The 1% Metal
film resistors have the following markings:
49.9 Ohm Yellow-White-White-Gold--Brown
100 Ohm
Brown- Black -Black-Black--Brown
499 Ohm
Yellow-White -White -Black--Brown
2.00 K
Red -Black-Black-Brown--Brown
10.0 K
Brown-Black-Black- Red --Brown
24.9 K
Red-Yellow -White-Red--Brown
100 K
Brown-Black-Black-Orange--Brown
1.00 M
Brown-Black-Black-Yellow--Brown
The multiturn trimmer resistors should be installed so
that the screw is at the location indicated by the white
square.
Jumpers
: Install wire jumper is location J1 and any
other locations as shown in the parts list, using bare
hookup wire. Make sure the bare wire of the jumpers
does not touch the surface of the circuit board.
Capacitors
: The Electrolytic capacitors are all radial
type. Be
sure
to observe polarity markings when
installing. The stacked film capacitors are brown and
have marking 224 for .22 uF and 105 for the 1 uF part.
