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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.