Sharp CE-1600E Service Manual

SHARP

-

CE-1600E

SERVICE MANUAL

1. SPECIFICATIONS

Model:
Product name:
Power source:

Power required:
Batlery operating time:

Temperature:
Dimensions:
Weight:
Accessories:

Optional Accessories:

Usable Printers:

CE-1600E
Parallel and pocket disk interface

7.5V DC supplied by five AA batleries or
optional AC adaptor (EA-160)

2.8W
approx. 50 minutes using manganese
batleries approx. 120 minutes using
alkalinebatleries (at20°C with a CE-1600F
connected while continuously writing and
reading a 4 K-byte prägram at 5 second
intervals)
1Q°C - 35°C
320mm(W) x 123mm(D) x 40mm(H)
approx. 640g (includes batleries)
AA batleries (5), screws (XBBSD20P
05000, PRICE RANK: AA) (2), Operation

Manual (1)
EA-158C (printer cable)
EA-160 (AC adaptor)
CE-1600F (pocket disk drive)
SHARP CE-515P, CE-516P, CE-700P
EPSON FX-80
See the operation manual for your printer
for information on electrical requirements
and printable characters.
Be sure to confirm compatibility (e.g. by
referring to the printer's manual) before
use for any printer no listed above.

2. SYSTEM ORGANIZATION

The entire system is shown below.

CE-1600F
(optional)

Printer
(optional)

EA-158C

, (optional)

"",,,,(, pti~~

CODE: OOZCE1600f:SME

MODEL CE-1600E

PARALLEL AND POCKET DISK INTERFACE

(FOR PC-1600)

3. NAME OF EACH PART AND ITS
USE

® Pocket disk drive

connector
(50-pin)

@

Adaptor plug

Note: The interface does not have apower switch. The power is

switched together with the power switch of the connected
computer. Disconnecting the computer turns off the power
for the interface.

CD

Computer connector
Connects the computer (PC-1600).

® Printer connector

Connects a printer through the printer cable (EA-158C).

® Pocket disk drive connector

Connects the pocket disk drive (CE-1600F)

@

Adaptor plug
Connects the AC adaptor (EA-160)

4. POWER SUPPLY

Size AA batleries (or an adaptor) are required in the interface to
operate the disk drive.

When the

I

BAIT

I

symbol is shown on the top right of the computer's
display, the batlery vohage is low. Replace the batleries in the
interface early.

Note: The interface and computer both supply power alternately.

Thus, operation is possible if power is available from either
one. However, the disk drive's motoroperates from the power
supplied by the interface.

5. ERROR CODES

The interface issues error code 69 during an error.

ErrorCode

Description

Printer is not connected. Printer is not on. Printer

69

is out of paper. Other printer related error
conditions.

SHARP CORPORATION

•

CE-1600E

If the printer takes 10 seconds or more lor the new page operation,

an error occurs when an attempt is made to output data following
the new page code (LPRINT CHR$(12);). I1 an error occurs, add
the following command.
1 ON ERROR GOTO 60000

60000 IF ERN=69 THEN RESUME
Lines 1 and 60000 are repeated until the new page operation is

completed.

6. END OF LlNE CODES AND
PROGRAM LlSTING FORMATS

Output of the end of line code at the end of a line can be turned
on and off if the amount of data exceeds the number of columns
per line specified in the PCONSOLE statement. Also, when
outputling a program listing, printing of the 2nd and subsequent
lines can be started from the first column or the 8th column.

End of Llne Code Output

Problems may arise if the number of print columns per line set in
the PCONSOLE statement is not the same as the number of printable
columns for the printer. Furthermore, most printers automatically
perform a line feed after receiving an entire line of printable

characters.
(1) Select "do not output end 01line code" Irom below il the value

132 is set in the PCONSOLE statement and the number of

printable columns for the printer is 80.

If "output end of line code" is selected, the printer will
automatically perform a line feed after the 80th column and
again after the 132nd column.

(2) Select "output end of line code" from below if the value80is

set in the PCONSOLE statement and the number 01 printable
columns for the printer is 132.

I1"do not output end of line code" is selected, the 81st column
will be output on the same line. Furthermore, if "print from the

8th column" has been selected, 7 spaces will be inserted

between the 80th and 81st columns.

Selectlon of the Start Prlntlng Position

Since the line number is printed from the first column, long program

lines that require 2 or more printed lines can be printed with 2nd
and subsequent printed lines starting from the 8th column to make
the overall program listing easier to read. Select this indentation
leature for easier to red program listings.

Key Entry: POKE & FE79, X

(X denotes the value 0-3 as shown in the table below.)

x

Output End 01Line Code

Listing Format

0

No

Print from 8th column

1

Yes

Print from 8th column

2

No

Print from 1st column

3

Yes

Print from 1st column

~-

When the PC-1600 is connected to interface for the first time or
when the raset button is pressed, X=0 will be selected. Futhermore,
whenever the power is tumed on again, the previous values that
were specified belore the power was tumed off are retained.

Note: The end of line code referred to on the previous page is

specified in the PCONSOLE statement. However, if a program
line is less that the number of columns per line specified in
the PCONSOLE statement, the end of line code specified in

the PCONSOLE statement will be output.

-2-

7.

PRINTER INTERFACE

The interface can connect with most Centronics compatible printers.
The interface uses handshaking through the BUSY siqnal. For your
reference, the printer interface connector signals, printer cable
wiring, signal timing chart, and electrical

requtrements

are given in
the following. The information is not necessary il a SHARP
recommended printer and cable are used.

(1) Printer Interface Connector Signals

\<D

0 0 --------------- 00

®}

~ 0-------------------0

®

Direction of

Pin

Signal

signal as seen

Description

Number

Name

fromthe

interface

1

STROBE

Output

Strebe

pulse used to output

data.

2

DATA1

Output

3

DATA2

Output

4

DATA3

Output

8 bit data signals with the

5

DATA4

Output

signal high when the data
is

"1".

6

DATA5

Output

The MSB is DATA 8.

7

DATA6

Output

The LSB is DATA 1.

8

DATA7

Output

9

DATA8

Output

The printer is ready to

10

BUSY

Input

receive data when low.

EXPRM

Signal used to initialize the

11

Output

printer.

A

Iow

pulse isoutput

when

the

computer is tumed
on (exceptwhen ~ is
pressed after an auto-
power off) or when the
reset button is pressed.

12

N.C.

Notused

13

N.C.

Notused

14 - 25

GND

Ground

(2) Printer Cable Wlring

The EA-158C is wired as shown below.

Computer end

Printer end

1
2

3

4

5
6

7

8
9

10

11

14-25

1
2
3

4

5
6

7

8
9
11

31
16,17,19 - 27,

29,30

Pin 36 at the printer is not connected in the EA-158C. Some printers
use pin 36 for the SELECT IN signal which must be in the SELECT
state. See the operaation manual for your printer. Also some printers
provide a switch for the SELECT state.

--

CE-1600E

(3) Signal Timing Chart

Moment when the power is turned on or when the reset button is
pressed (except when

@ffi

is pressed after an auto-power off.)

(4) Electrical Requirements

1.

Signal Levels

Input signal: TTL level

Output signal: TTL level (capable of driving one TTL IC)

1/0

-1

EXPRMt--Tt--I

2.
Input signal:

V

cc

DATA1- .... _ x:---x

DATA8~~-
STROBE Tl: approx. 20ms

T2: 1.5ms or more
T3: 1.5ms or more
T4: 15-20 µ.s

Output signal:

2.8K

M54514AP
orequivalent

Since all the outputs are through an open-collector, a pull-up resistor
(approx.

1kn - 10kn)

at the printer is required. SHARP

recommended printers already include a pull-up resistor.

8. Block diagram

Centronics interface

PC-l600

v« __

---!

v

rc

ir

PC-l600 '-- __

..J

power supply circuit

EA-l60

(AC adapter)

AAx5
(SUM3x5)

CE-I600F

(2.5"FDD)

11!Q

,--- 1 ...

PTI .PUI .EZI

MINI.IORQ
MRQI.RDNI
WRNI

I'BO-7N

NU

RSTI--~----4_------~--~

Bu

: 8 bits

1/0

Buffer

I'CO-7N

Mu

: Mul t iplexer

FFl-3

: 8 bi ts Latch

DCl-3

Decorder

INT

: Interrupt circuit

RST

: Reset cireuit

PAO-7I

: 8 bi ts input

PBO-7N : 8 bi ts output port

PC 0-7 N : 8 bi ts output port

~-----

,

- -----,------ -- - -- - .- - -f -

-f - .,

CSNO

107N

RSTN

GNU

vcc

[Fig.2) LR38045 block diagram gate array

-

CE-1600E

9. Description of each block

9-1.

LR38045 gate array

Table-1 describes the gate array internal blocks and port addresses
(see block diagram [Fig.2]).

Block

name

Description

Bu

Bidirectional8- bit 10 buffer.

(8-bit inputoutput buffer)

Mu

Datai1 FF1, FF2, FF3, or PA Port are sent from

(Multiplexer)

the

gate array.

FF1-FF3

FF1: FF1outputisused to control

the

interrupt

(8-bit latch)

circuit. For instance, '1'ina bit

FF2:
FF3:

DC1-3

DC1: 32KB ROMc~ select (CSNO)

(Decoder)

DC2: 2.5' FDD select signal (I07N)
DC3: FF1- - - FF3 and FDD reset latch select

during data write.
FF1- - -FF3 and PA port select during
data read.

INT

Ths

signalisOOedwi1ha PA POrt(PAOI- - -61)

(Interrupt circuits)

i1put to be sUppliedto IRQas an

nternet

signa,

As

PA01---61 correspond wi1h00---06 of
FF1, the interrupt becomes valid when '1' is
establishedfor FF

I.
(The interrupt equivelent circuit is shown in
[Fig.3J. )

, RO

.

ri

~

~ I~

OO~

PAO I

0'

~

PA I

J

02

PA2 I

OS

V"

PA3t

O'

"""

PA. I

Q5

PAS I

Q6

A.

PA61

'--

?1",+-tv'J

-t'"

[Fig.3J Interrupt circuit

RST

An input of the reset signal on RSTI resets

(Reset circuit)

FF1- - -3. At the same time, RSTN is issuedto
the

2.5" FDD reset line and remains issued until

the

reset signa is canceled soltwarewise.

It is

possble

to output RSTNsoftwarewiserrespecti
ve of the i1put to RSTI.
ReseteQuivaientcircuit is sOOwnin [Fig,4] andits
timings in [Fig. 5], )

-4-

Block name

Description

{

VCC~

Reset line capacitor /' RST' ~

.P""'~J~"OO::.~

RSTN

'RESET SW

'';TE.

IlI>Il·~'

I ;

t>

1 I

(PC-1600J:1) :0 .FFI-3RESET'

'---- ---

-----

-

-----

------]

[Fig.4] Reset circuit

W-, Tt_

Reset signal, ~

F~'~~

sv ~

'----v-------

FD resets softwarewise

[Fig.5] Reset circuit timings

NOTE: Port PA, PB, PC are all active high inside the gate array,

but converted into active low outside the gate array (see
the figure below).

Gate array

,

Inside , Outside

PA

PB

ACTIVE HIGH

ACTIVE LOW

For instance, "1" on 00 of FF2 sets the PBON output low.

·_

CE-1600E

10RQ

Address

Data

MI A7

A6 AS A4 A3

A2 Al AO

WR

IID

Operation

D7 D6 05 D4 D3 D2

01

DO

1

1

0 0

v------

FD INT

l-----

--

0 0 0

0

0

0

1

FFI data write

0

*

-----

---

Enable

1

0

FF1 data read

1

1 1

1

1 1 1 1

FD reset

0 0 0

1

0

1

FD Reset

(0: reset)

PAO-7read

.>

(0 ) (0) (0)

Comparator

Vp LB

Centronics

1

Q

FD INT

LB BUSY

FF2(~)

-:

Centronics Centronics

I----

--

0 0

1

0 0

I

Pullup

~

data write

iNiT

"STJm!it

--

1

11

FF2(~)

1

1

1

1

1

1 1

1

data read

0

FF3(~)

Centronics

~entronics

Centronics

Centronics

Centronics

Centronics

Centronics Centronics

0

1 1

0

1

data write

DATAI

DATA2 DATA3 DATA4 OATAS DATA6 DATA7 DATA8

1

0

FF3(~)

1 1 1

1 1 1

1

T

data read

NOTE: All

are active high (1: active, 0: inactive) as seen Irom the

CPU,

except lorFDreset (0: active).

©

LR38045gate array signal description

PIN No.

Pin name

1/0

effective Highlow at reset

Descriltion

1-8

PC7N-PCON

Out

low High

8-bit output

port

(port address 83H)

00-D7 corresponds to PCO-7N via FF3.

9-16

PB7N-PBON

Out

low High

I-bit output

port (port

address 82H)

00-D7 corresponds to PCO-7N via FF2.

17

(NC)

18

PUl

In

(Low)

PU input

[ Used to create 32KB ROM select signal (CSNO).

J

19

PTI

In

(High)

PT input

20

EZI

In

(High)

Eminput

21

MINI

In (High)

MI irclut

[~edtocreate 107N and gate array interna! enableJ

22

10RQ

In High

IORQ input

Signals.

23

MRQI

In High

MREQ input (used to create CSNO).

24

RSTI

In High

Reset

input.

When

the

reset

signalisentered,

the

intemal

~1Iopisreset

and RSTN (2.5' FDD reset signal)issent out.

25

Vcc

.

26

GND

) Power supply

27

IRQ

Out

Low High Z

All N-cIW1nel

open

drain interrupt signal output wtich

is

puIed ~

toVCC

on

the

PC-1600 siele.

28

RDNI

In

low

Jm"input

29

WRNI

In

low

WR"input

30

I

AOI- A71A141, A1SI

In

Address input

39
40

(NC)

2.5' FDD reset

signal

output.Sent out lIlCOIidiliolfilly

with

the

reset

signal

41

RSTN

Out

low

low

and

mustbecanceled by means of software.Itis

possble

to

send

out

softwarewise. (Address 81H, 00,

WR")

42

107N

Out

low (High)

2.5' FOD select signal.
(SenT out

via

address 70H-7FH.)

43

CSNO

Out

low

(High)

321<8ROM select signal.

rm

MREQ. PT············High

pU·····················low

Address········· ···4000H -7FFFH
(PV"'low; Centronics interface, High; FDD)

44-51

DBO-DB7

ln/Out

(8-bit) data input

and

output.

52

I

PAOI-PASI

In

low

Il1lut

port

(port

address 81H)

57

PAD-61 corresponds to DO-6.

60

PA61

(Interrupt controled by FFI (address 80H) output 00-6.)

58

GNO'

Power supply

59

(NC)

61

PA7B

Out

High

62

PA7N

(Out)

64

PA71

In

High

63

(NC)