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ZX81 の電気的特性と機能

ZX81のメーカーはsinclairです、この部品の機能は「Service Manual And Assembly Instructions」です。


製品の詳細 ( Datasheet PDF )

部品番号 ZX81
部品説明 Service Manual And Assembly Instructions
メーカ sinclair
ロゴ sinclair ロゴ 




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ZX81 Datasheet, ZX81 PDF,ピン配置, 機能
This technical manual was OCR'ed for the
Sinclair world by Andy Dansby.
[email protected] All intellicial
information contained inside this technical
manual is the property of Amstrad.

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ZX81 pdf, ピン配列
Although the I C. sockets do not need to go any particular way round, you may like to put the bevelled
corner at the notch end of the I.C. position as a reminder, since the semicircie printed on the board will
be covered by the socket in some cases.
(b) The diodes (prefix D) have their + end identified by the band painted on the body - or in the case of
components with several bands, the + end will be the widest band. This corresponds to the flat bar of
the symbol printed on the board. (See fig. 2).
(c) The electrolytic capacitors (C3 & C5}will have a + or - symbol printed on them, and the + wire is
usually longer. (See fig. 3).
(d) The transistors (prefix TR) go in the board as shown by the picture printed at their positions - i.e.
with their rounded corners facing the edge connector.
(e) The jack sockets and modulator need to have their business ends (i.e. where the plug goes in)
facing outwards, away from the components. This should be obvious by inspection of the board and
case.
(f) The regulator (REG) and heatsink need to go in a particular way round -just follow fig. 4.
(g) The keyboard connectors KB1 & KB2 have their pins offset from their centre line, and KB1 goes
the opposite way round to KB2. Make sure that in each case the body of the connector covers up the
component number on the board. (See fig. 5).
. , . ... ... . . - , . . . . ,. . ..
(h) The resistor packs (prefix RP) have a 'common' end marked wltn a whlte dot Thls snould at tne
end marked with a 'C' on the board.
(i) The single resistors, the rest of the capacitors, and the filter X1 may be put in either way round.


3Pages


ZX81 電子部品, 半導体
these locate Serious damage will result if the long screws are inserted in the wrong holes.
(iii) Locate the board on the pillars in the case, make sure the jack sockets are behind the holes in the
side, and screw it into the case. Only two holes need screws in them at this point - Fig. 11 tells you
which two; the others are for the case bottom fixing. Since the screws will have to form their own
threads in the plastic, they may be a bit stiff to turn the first time therefore it is essential that the proper
screwdriver should be used. An ordinary flat screwdriver will almost certainly slip, and may cause
damage to the circuitry when it does. See the list of tools given in section 1
(iv) Turn the case the right way up again, peel the protective paper off the back of the keyboard and stick
it into its recess in the moulding (the keyboard is self adhesive - no extra glue is necessary). It would be
as well to position the'keyboard correctly the first time, to avoid damaging it by continual relocating.
Locate the top edge of the keyboard against the top edge of the recess, and stick it down carefully,
working gradually towards the lower edge. Have a dry run first if you are in any doubt. Do not try to stick
the whole surface down in one go.
(v) After checking that the keyboard connections are still securely in place, locate the bottom half of the
case and screw it to the top with the remaining five screws. Finally the rubber feet plug into four of the
recesses, over the screw heads. Fig. 11 shows the location of screws and feet.
(vi) Give the computer a final check, and start using it. . . .
8. COMPONENT LIST
Note that some components are marked on the circuit board, but shown as "not used" in this list. Do
not put anything in these positions.
(a) Resistors.
All resistors have four colour bands: the fourth may be gold or silver.
No. Value
R1 10K
R2 680 Q
R3
R4 18K
R5 330 Q
R6 2K2
R7 470 Q
R8 470 Q
R9 470 Q
Markings
Brown Black Orange
Blue Grey Brown
Brown Grey Orange
Orange Orange Brown
Red Red Red
Yellow Purple Brown
Comments
Not used
5

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ページ 合計 : 43 ページ
 
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