2K/4K MB3

2K/4K EPROM BOARD

DESCRIPTION & PRICES

o ALTAIR 8800 and IMSAI 8080 pIug compatible

o Option of 2K (8) or 4K (16) 1702.As o Dip s'witch selection of addressing

and wait cycles

o Reverse vol~age protection

o On board regulators for +5 & -9 v o All sockets included in kits o Gold plated finger contacts

Complete Kit (less EPROMS) $65,,00 Complete Kit (8 EPROlvrS) $145.00 Complete Kit (16 EPROJ.VIS) $225.00 Prices include postage for U.S.

and Canada" \AJe ship UPS Blue Label when appropriate. UPS COD orders accepted. No credit cards please:",

MB3

© lIne

BASIC KIT LIST 2 CTS dip switches

16

2h pin ^10lrJ profile sockets 6 16 pin low profile sockets

2 14 pin low profile sockets 2 LM340T-5 regulators

2 LM320T-8 regulators 4 IN4001 diodes

2 56 ohm 5% resistors 6 470 ohm 5% resistors 19 2.7 K ohm resistors

6 tantalum capacitors 2 .1 ceramic capacitors

1 74LOO

1 74104

.2 74L42

1 74175

2 DM8097

'1 DM8131

.L

1 PC board

L~ sets #6 screws,nuts & washers

~---=---~---~---

2/16

I:

CD W

•

,

t102A;i

"'IIii

1702

A ,. ~=

"

1702,A

~~

,

1102 A _{• CD}

E:;

~

170t.A ~

8

"

1102

A i~

~

1102 A

G.~

Solid State Music

MB-3 ASSY INSTRUCTIONS

1. Check the parts count \dth the packing slip.

2. Insert the 24-pin sockets in the PC board.

Be certain all pins are through the board before soldering.

2A. Place socket side of board on a flat surface and be sure that all sockets are flush with the board.

2B. Check to see if all socket pins are through the holes.

2C. Solder socket pins 1 and 24 on each socket. Check to see if sockets are flush with board, then solder remaining pins.

3A. Insert 16 pin sockets at U20, U22, U24, U25-U27.

3B.

Insert 14 pin sockets at U21 and U23.

3C. Solder two pins of each socket as in 2C.

3D.

Check for correct insertion - then solder remaining pins.

4A.

Bend leads of 340T-5 (+5V REGS) to match pads at Ul and U19.

4B.

If available, cover back surface of regulators with silicone grease.

4C. Install #6 screws from back side of board. Install nut and washer on component side.

4D. Solder leads to pads on reverse side of board.

5.

Install 320T-8

(-BV

REGS) in same manner.

6.

Install 4ea IN4001 diodes as shown on layout drawing. Be certain that the cathode band is toward the pad with the dotil (These diodes protect the 1702As from damage by reverse voltage.)

7.

Install and solder Cl and

C5.

Observe correct polarity. Round nose toward dot.

B.

Install and solder C3. Observe polarity&

9.

Install and solder C2, C4 and C6(jl Obser\re polarity",

10. Insert'Rl,R2, R? and R8e Solder in place.

(-9v

reference dividers.) 11. Install and 'solder C7 and C8.

12. Install board in computer and measure regulator output voltage.

+5v

and

-9v.

13. Install R9.

14. Install R10-R17, R18-R25 and R26-R27. (2.7K

1w)

15. Install R3-R6.

16. Install dip switches with the "on" mark toward the top

ot

the board.

17. Insert and solder jumper for 2K or 4K option.

WAIT CYCLE SETTINGS (T1 Through

T4)

1. All switches off: no wait cycle (5COns) 2. T1 on: one wait cycle (lus)

3. T2 on: two wait cycles (1.5~)

4 •. T3 on: three wait cycles (2.Ous) 5. T4 on: four wait cycles (2.5us)

ADDRESSING

(A12 Through A15)

000 000 to 017 377 020 000 to 037 377 ' 040 000 to 057 377 060 000 to 077 377 100 000 to 117 377 120 000 to 137 377 140 000 to 157 377 160 000 to 177 377 200 000 to 217 377 220 000 to 237 377 240 000 to 257 377 260 000 to 277 377 300 000 to 317 377 320 000 to 337 377 340 000 to 357 377 360 000 to 377 377

All switches on

A2, A3,

A4

on A1 ^t A3,

A4

on A3, A4 on A1, A2,

A4

on A2, A4 on A1, A4 on

A4

on

A1, A2, A3 on A2, A3 on A1, A3 on A3 on A1, A2 on A2 on A1 on none on Warranty

Parts are guaranteed to original purchaser for

90

daye. Send detective parts along with the board serial number (next to the top

lett

regulator on the back of the board) for replacement. Registration card must be·returned for warranty validation.

....

A completed board may be returned for service. The service charge is

$20.00, which will be waived if the problem is one that could

not

have been solved by reasonable effort on the part of the owner.

Our address: Solid State Music/ 2102A Walsh Ave./ Santa Cl~at CA

95050

.. ...

52

3Q.OT-S 7908

0 - N " " f o II) "",....

~<.·~("'~qctct"

fl?

5081 ³¹ 30 2:>, &'l 8'31

17 ,8 Iq 'lA 11

I

~

~

H

^{U I 0} ~~.--...,:t:-:-~:...V_)_ ... -_ ... --+-1---+-.... +I-I+-I-+-I-+-H+-H+-H+-H+-....-... -:~~~

~~D2

!o

-~

.~

(J/I • "I 0 14 • 11/

~

U2. U3 U4 ^'U5

¢¢

^{tf,/ (/)2 (1J~}

(PO y~~

5V :340;-5/. )

+ J~UF 7SDS (.2

,.,..SV)

I

/o~ ~ "'-u-I---'I r ~

.~ ~ .~ 1.~ ^D1₄^;\ c-:

J.

c~l

-I-l

r~--

...

~-·I---4-.;-u-t

... T ;,

:.~ ____ :+~ ____ :+~ ____ .~~ ___ ~'l~~·_/~

^__

·'_6_-.~c

¹ ...

.y_2-:U-/~9~-...~ el~

^{'3;;1/ .}

~

^D

J '---I~1-2

^-10...1

t-8v

~9,---_ _ _ _ ~ DI0

.~-,,;;:,'~----f?4)

^{01 J}

10

('l I~ ." 1# ^1,\11/ .,Il

~ v',~ 't:...

00

U~

Ur

\...\8 'u9 ⁰¹ ₁₎₂

¢.I/ rJj5 c2J~ rJ7 ^OJ

~ ,

o~, ^t(l

0., ^I

~~

'Icc I/Gr:

Yet: _'p ~~ _~'-

Ll \ P/~

_ _ _ _ _ , d . -_ _ _ .. " _ _ _ _ _ _ - - " _ _ _ _ _ _ _ _ _ ~ _ _ _ _ 4 _ _ - - - - . L . . - - - '

~

1'j

l'

Z

1&

u 2 )..

VI ~

o-n ro+----...

--...(")-<-..;.... C>-- i2

r-+-r---II-+tI~...(")-u.... 0 - T 3

~o 0- T4

19

\) V Q. ~

15

a

^f-

'12 ^{D lfJ Cl 7c;-}

g

()~~ ^~

5

'? -^~

4 ^t,,...~ _~ ^{U'2 \}

<tAl

'i

^{l U'2.0 4 5}

14

54

34

~ffl87 33 SS 8~ 32

471

⁷

81

tD(j\Q::~~7~~

,,«<c«c«1(~2 t.ll

~ «}

~ Q

@'116

~O~\l) STItfE MUS Ie MB'3 ~CHEMATIC