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convert 5 meg to 10 meg
materials needed:
5 meg 10 meg
1. r-36 br,blk,br,gld br,gr, br, gld
100 ohms 150 ohms
2. r-40 br,gr,rd,gld rd,yellow,rd,gld
1500 ohms 2400 ohms
3. r.3? or,wt,br,blk,gld yellow,purp, br, blk,gld
390 ohms 470 ohms
4. r-41 br,gr/d,gld rd,yellow,rd,gold
1500 ohms 2400 ohms
5. r-10 br,vio,gray,br yellow^blk/d ,br
1781 ohms 4021 ohms
6r-14 yellow,gr,gr, blk,gld ye11ow,wt,wt,blk,gld
45.5 ohms 49.9 ohm
cut small trace on controller card between p-3 and u-41
install apple spec, st-412 Seagate hard drive
format drive and initialize spares tables
install 10 meg system z-8
all resistors gold bond 551
resistor tables
color band
value
multiplier
bleck (bl)
1
brown or tan (br)
1
10
red (rd)
2
100
orange (or)
3
1,000
yellow (yl)
4
10,000
green (gr)
5
100,000
blue (bl)
6
1,000,000
violet or purple (pur)
7
gray (gry)
8
white (wt)
9
silver
108
gold
58
black
18
red
.]%
orange
.018
yellow
.0018
locations of resistors
on analog card on row between component u-?(ca31273) and the ground
pin at the board edge oppiset the j-6 plug
r-36 the first component (1st resistor)
r-40 the fifth component (4th resistor)
r-3? the seventh component (6th resistor)
r-41 the ninth component (7th resistor)
these component positions ere counted from the board edge toward the
transistor q-1
at the other end of that seme row sterting et component cr-15 end
between component u- 1(6700) end component u-2(?4?-n)
r- 1 4 the fourth componant(4th resistor)
r- 10 the fifth componant(5th resistor)
on reverse side of board meke sure that there is the following
1. a jumper between pin one(1) and pin ten(IO) of the u-2(747-n)
2. a jumper between pin four(4) and pin thirteen(13) of the u-2(747-n)
3. a 3900 ohm (or,wt,rd,gld) resistor between pin four(4) of the u-2 and
the pin of the resistor above pin eight(6) of the u-3 componant. this pin is
located between pin eight (8) of the u-2 and pin eight (8) of the u-4
4. a 3900 ohm (or,wt,rd,gld) resistor between pin ten (10) of the u-2 and
the pin above pin fourteen (14) of the u-2 . this pin can be identified also
by a thick trace starting at this pin and going through the end pin at
connector j-6 and ending at a trace at the edge of the board running at
right angles.
