Sharp ER-1911 User manual

SHARP _ SERVICE MANUAL
CODE:00ZER1921SM2E
ELECTRONIC CASH REGISTER
No.2: Hardware manual
ER-1 91 1 (Europe Ver.)
ER-1921
ER-2 S386 us, Ver.)
move. ER-2396
SRV Key :LKGIM7113RCZZ
CONTENTS
L. ER-191 1/ER-2386 ........ cece cececereeeeeeeeseeereeeeeneerepereeensnsenerenaens
1. TEST FUNCTION (ER-1911/ER-2386)
2. CIRCUIT DESCRIPTION (ER-1911/ER-2386) ...
3. CIRCUIT DIAGRAM (ER-1911/ER-2386) ...........:ceeeeseeeeeeeeees 12
TL. ER-1921/ER-2396 .2.......cccecceeeneeeeeeeeeeeceeteseeceeesaseeaeeeeerenerene 15
4. TEST FUNCTION (ER-1921/ER-2396) .........ccccceseeeereseneeeeees 15
2. CIRCUIT DESCRIPTION (ER-1921/ER-2396) ...
3. CIRCUIT DIAGRAM (ER-1921/ER-2396)
TIL. INSTALLATION MANUAL FOR OPTIONS. .........:::eeeeeeereerees 32
a
SHARP CORPORATION This document has been provided for
service training program and is subject
to revision without notice.

I. ER-1911/ER-2386
1. TEST FUNCTION (ER-1911/ER-2386)
1-1. Start of test function
The following key operation is required in the SRV1 mode to start
the test
20 > RE] or [REND
Test command
RE] key : ER-1911
BEND] key : ER-2386
1-2. List of test command
No. Description Key operation
1_|Mode switch test 1 [RF] orfRFND.
2 |Key test XXx02 [RF] orfRFND!
3. | Display test 3 = [RF}or|REND]
4 .| Buzzer test 4 > [RE] or[REND.
5 | Receipt ON/OFF switch test 5 + [RF] or[RFND]
6 | Drawer open test {with option installed) 6 > [RF] or[RFND}
7_|Printer test 7 — [RF] or[REND-
8 | RAM test 8 = [RF] or[RFND]
9 | Key position code test 9 — [RF jor[RFND
10 [Sequential test XXX11 > [RE] or[AFND
XXX : Sum check data for standard key layout
ER-1911{5DEPT.)=22 ER-2386=237
ER-1911(10DEPT.)=213
41-3. Test description
1) Test No.1 : Mode switch test
® Key operation
1 -+ [BF] or REND)
Then, turn the mode switches in the following order.
Mode switch operation
SRVI
PGM
[eq] or VOID
of OFF
TIME i
REG
x
Display
Lary.
IM ine
x222 u
Mode switch position layout
For ER-1941
REG
For ER-2386
REG
TIME
o
xt xt
Z
X2Z2.
PGM
(SRV1)
(srv2) (SRV2)
@ Description
As the mode switch position number is displayed, check the
number.
@ Termination
The mode can be terminated when the mode switch is turned
to the SRV1 side from other position.
Termination print 1
Error print = 2 (zaaa 1E
2) Test No.2 : Key test
© Key operation
eo or [REND]
Test command
Sum check data
Enter the test command in succession to the sum check data
of the model.
Modet Sam check data_|
ER-1011 : SDEPT. 22
ER-1971 10DEPT. | 2is*
ER2386 10DEPT. 267"
* NOTE : Sum check data
The checksum is a decimal number obtained by converting
jow two digits of the hard code haxadecimal total of all keys.
The[TL] or keys are exception.
+ Next, push every key on the keyboard except for the receipt
and journal keys.
When the [TL] or [CA/AT] key is depressed, the termination
printout is immediately produced assuming that all keys have
been depressed.
There is no order in which the keys have to be depressed.
+ Keyboard position code of model vs. key lay out
[All key position code]
A2| 12 | 04 | 02 | 03
cic eel |
R lJ 41 | 42 | 72 A3 | 32 | 14 02; 01
43 | 44 92 |s2 73 A4 | B2/ 13 03 | 22
54 | 53 93 les 74 A1|B4) 34 11 | 24
52 | 63 81 loa 84 71 |B3/ 33 23
51 | 62 61 | 64 91 /B1)31 21
{ER-1911]
5 DEPT.
A2} 12 02
R ee 41 | 42 |72 32 01
43 | 44 92 |82 |73 B2 22
54} 53 93 (83 |74 B4 24
52/63 81 (94 |84 B3 23
51 62} 61 | 64 B1 TL

10 DEPT.
a fh 41 (42 |72 32) 14 01
43 | 44 92 | 82 |73 B2| 13 22
54 | 53 93 | 83 |74 B4| 34 24
52/63 81 1.94 | 84 B3 | 33 23
51 | 62 eife4} | B1|31 Th
ER-2386] aw
02 |03
als 4 a2 |72 32 [14 o1
43 | 44 92 82 |73 Ba {13 22
54/53 j93 83 |74 11 | 24
52 | 63 [at 94 | 84 23
51 | 62 61 | 64 CAAT
® Description
Until the depression of the [TL] or [CA/AT} key, the sum of key
position codes is compared with the sum.check data, except
for the [TL] or [CA/AT] key.
® Display
+ Display the hard code of the key pressed.
+ High and low digits of the hard code are separated with a
hyphen *-".
+ Ifthe hard code value is A or B, it will be converted into
decimal equivalent and displayed.
A 10
Boil
© Termination
The test terminates with the depression of the [TL] or [CAYAT]
key and the termination printout is produced.
Termination print: | 2/24
Error print |
3) Display test
@ Key operation
RE} or] REND
35
@ Description
The display pattem is kept displayed in the given interval after
the test mode was established.
Press any key to cancel the test mode. In this event, the
display returns to the initial message display.
+ Disptay
'
Li Bel 86 di:
Lott al 6 8 tt
7
15 66 AB
LS 6 648 2 ly
al £6 4 8 AA OY
Eee ce
@ Termination print : { a |
4) Test No.4 : Buzzer test
@® Key operation
4 [RF] or [RFND)
@ A continuous beep will be issued when in this mode. Press any
key to cancel the test mode, The beeper will then be turned
off.
+ Display
@ Termination print : I 4 1
5) Test No.5 : Receipt ON/OFF test
@ Key operation
5 [BE] or [RFR
@ Description
The following is dispiayed according to the location of the
receipt on/off switch.
Display : | 5 O|Receipt on (contacts open)
5 C]Receipt off (contacts closed)
® Termination
With depression of any key,
Print out : { 5 t
6) Test No.6 : Drawer open test
© Key operation
6 > [RE] or [RFND
@® Description
With this test, the drawer opens and its state is displayed in
the following manner.
Display: [ 6 0} Drawer open
fa C] Drawer close
For the model with the drawer ‘open sensor, check that the
display shows “0 when the drawer opens, and "C* when it
closes.
For the mode! without the drawer open sensor, check that the
display always shows "C’.

® Termination
With depression of any key.
Print out : \
7) Test No.7 : Printer test
@ Key operation
7 -» [RE] or [REND
® Description
Receipt switch in the position OFF: Continuous printing is
done,
Receipt switch in the position ON : After a cycie of printing,
the operation terminates automatically.
Display :
® Termination
When the receipt switch is tuned fram OFF ta ON position
while printing is continuing, the test terminates after a cycle of
printing.
JA continuous print example]
Address vs. data
EB-2386 ER1aiL
oo
Cooo0ddsaaT
Uitidy tag rinttnia
2222222208 222222220
BE333333E0 33333333E
SEER AGELESS 44446446
5555555570 555555557
6666666608 656666660
TAVITTTIX TTVITITVIX
8eeaessare 88888883
I99DIIIOE 99999999K
Lea eee
peers!
terres y £4
8) Test No.8 ; RAM test
© Key operation
8 [RF] or [REND
® Description
After writing the tollowing data in the RAM, the data is check
by reading the RAM.
i an error occurs, the operation ends with the termination
error printout.
The application will handle it as address O00OH~3FFFH and
4-bit data by the handler and converted to the address
Q000H~1FFFH and 8-bit data,
NOTE: The data in the RAM is cleared by this test.
Perform a master reset function ater this test is completed.
“Torre gg se 7 a OP ATR CID ETE
TOI [Oi 2 ss 5 Si TSH ABCD RIE
DOR {PTOI 28 4S OTS I IAIBIC DIE
@0 4X )BiFi0/31213:4;5!6/7/ 8) 91AIBICID
@ ON [DIEIFlO1112:914'516:7:18:9:Ai BIC
O LOX (CIDIE:FHO(1i1 213341516171 819 1 ALB
OZONIBICIDIFIFLOL 21S 415 BT BGA
04 0X JAIBICIDIB FO 12 si a Si si 7i eis
THON |OABICIDIBIFi0 1; 213: 4 516/718
TOOX |Si9:AIBICIDIEiFiOilizisiai si giz
SOON IT SIV ABICIDIB FlOlil 273 afsis
‘The write data to other address will be 0.
Display: | 8
@ Termination
8 ( (=2Ses55 gE |
Normal termination print out Error print out
9) Test No.9 ; Key position code test
® Key operation
9» (BE or FAD}
® Description
Shows the hard code of the key pressed, except for the
[CA/AT}key- :
Press the[TL] or key to cancel this test mode.
* Display
LA 1.
: Indicates the hard code of the key depressed.
High and low digits of the hard code are separated with a
hyphen *-".
if the hard code value is A or B, it will be converted in to
decimal equivalent and displayed,
@ Termination
40) Test No.10 : Sequentiat test
@ Key operation
40 -» [RE) or [RFND}
Sum check data
@ Description
Checksum for the keyboard test js similar as the Jab#02, is a
decimal number obtained by converting low two digits of the
hard code hexadecimal total of all keys.
With this test, test items 1~8 are executed in succession. The
basic print pattem, however, is used for the printer aging test of
en 7.
The basic print pattem wilt be printed just for once, ragardless
of the receipt switch position.
Termination print (or error print) will be obtained avery time a
test has completed before going to a next test.
After compietion of the test item 8, the stamp is printed and a
receipt is issued and the sequential test terminates.

Key operation, display, and printout of tests
No. Test Key operation Display Print (norma! pattern) Note
1 | Mode switch
Made switch
2
SRV1
2 Key Key entry
TL key
3 Display
The display
pattern wil}
continue until a
key is pressed.
(Any key)
4 Beeper Beep
(Any key) Beep stop
5
Receipt
Receipt
issue
ON/OFF
active
—
Receipt issue
}
|
(Any
key)
not
acive
6 |Drawer open Drawer open
NOTE; Drawer
(Drawar
close)
open
sensor
kit
{Any
key)
must
be
installed.
7
Print
Le
ER-4911
ER-2386
| 8 RAM
(Stamp printed and
receipt issued)
@ Termination
All tests automatically terminate open finishing the stamp test.

2. CIRCUIT DESCRIPTION (ER-1911/2386)
Circuit block diagram
Voltage
regulator
Printer power source VP, VM
Display power source VDISP
AC power Power
Do-DC Drawer Buzzer
converter
Power ON/OFF switch
Strobe signal
ol aise
peta ae LsI
Mode switch} S808 x uPD75217
Receipt
ON/OFF
cutoy Address|
Latch
Power Ad-
switch dress
Operator
__ side display tube
display tube 9MT9BG
PMT98GY
RAM
HM6264,
Fig. 2-4

2-1. hPD75217 Terminal signal
No.|[ Name Description T/o
T ss Kéy strobe/Display tube segment signal (d) out
2] s2 Key strobe/Display tube segment signal (c) out
3] $2 Key strobe/Display tube segment signai (b) out
4| so Key strobe/Display tube segment signal (a) out
5 | POO Power off signal in
6 | Pol Print data shift clock output out
7 | Boz Print data output out
8 | Po3 Key return signal in
3] a Printer timing signal input in
10] P11 Key return signal in
Ir | Piz Key return signal in
12 | P13 Key return signal in
13 |. -cs1 RAM chip. select signal out
14 [° -wE RAM write signal out
15 | P22 Printer motor on signal out
16 | P23 Drawer open signal out
17 | P30 Mode switch return in
18] P31 Key return signal in
19 | P32 Address latch enable for RAM out
20 | A12 RAM Address bus Al2 out.
21 AB RAM Address bus Aé out
22 AD RAM Address bus A9 out
23 All RAM Address bus All out
24 ALO RAM Address bus Al0 out
25 DI/A0 Data bus D2/Address bus _Al0 in/out,
26 D6/A: Data bus Dl/Address bus Al in7out
27 DS/A4 Data bus DO/Address bus A4 in/out
28 D4/A2 Data bus D7/Address bus A2 in/out
29 PPO Buzzer signal out
30 XL X'tal terminal 4.19MHz in
31 X2 X'tal terminal 4. 19MHz in
32 vss GND in
33 xTL Timer X‘tal terminal 32.768KHz in
34 XT2 Timer X'tal terminal 32.768KHz in
35 DO/A7 Data bus DO/Address bus A7 in/out.
6 DIZA' Data bus Di/Address bus A6 in/out
37 D2/A5 Data bus D2/Address bus AS in/out
38 D3/A3 Data bus..D3/Address. bus A3 in/out
39 ~RESET Reset signal input in
40 TO Display tube 1st digit drive signal out
Hitt} bisslay tubs and digit drive signal ——— out
a2 | T2 Display tube 3rd digit drive signal out
43 | T3 Display tube 4th digit drive signal out
44] T4 Display tube 5th digit drive signal out
45 | TS Display tube 6th digit drive signal out
a6 TS |— Display tube 7th digit drive Signal out
47 | 17 Display tube 8th digit drive signal out
48} T8 Display tube 9th digit drive signal out
a9 | T9 NU
50 | PH3 NU
Si | PHZ Wo
2 | PHL Printer magnet data output enable signal out
53 | PHO Printer magnet data strobe signal out
54] Sil Key strobe signal out
55.| S10 Key strobe signal out
[se + Vioad Power (-20V) for display in
57 | Vpre Power (-4V) for display in
58] 59 Key strobe signal out
59] 58 Key strobe signal, Display tube segment (¥) out
60 | S87 Key strobe/Display tube segment (DP) signal out
ei | 56 Kéy strobe/Display tube Segment signal (9) out
62 | s5 Key strobe/Display tube segment signal (f) out
63; S4 Key strobe/Display tube segment signal (e) out
64 | vpDD Power (+5V) in

2-2. Circult description
4) RAM Read/write circult
HM5264 pPD75217
Data bus i
po-07 K DOYA7-D7/A0
Address bu
ADAI2
P32
40
AB-AIL
WE We
os E tsi
Fig. 2-2
Since the 8-bit data bus of the pPD75217 shares the same lines
with the 8-bit address bus of the HM6264, selection of the RAM
chip by the pPD75217 causes the HC973 to latch the 8-bit
address when P32 of uPD75217 is inputted.
DOK?
~DIIA2
HC978
output
Ta =
wR H
RAM data read timing
2) Battery Circuit
o os .
v0.00 —D+ De vecisvi
ama voo isv
a0
cr
—- : Battery recharge current
---+ : Battery discharge circuit
Fig. 2-3
3) P-OFF Circuit
Power SW
Torr eweon
Fig. 2-4
At power on
When P-ON voltage reaches 16V, the current flows through the
zener diode (MTZ16B) so that the level at point @ goes high.
‘The eve} of P-OFF rises as VCC increases. As a result, the P-
OFF signal changes from low to high level.
At power off
When the power is turned off, the P-ON voltage drops under 15V
causing the zener diode to stop current flow, which causes
potential at point @ to drop.
Power ON Powe: OFF
sav
Pon / \ as
tov
rom @ / \ eno
tv
Pore Se
~ 8y
Reset GND
Fig. 2-5
4) Key and switch
so~-S11 Key scan signal
POS, P1i~P13 Key return signal
vo : Power switch
P-ON Made switch
P3ok Mode switch
Return signat

5) Display control
80-88
pPD75217
Fig.10-7
a~g: Display segment
DP :. Decimal point
Vv: Indicator
Fig, 2-7
A-G, PLY
Display tude

6) Printer control
Block diagram
CR-802A or UCR-802A PRINTER
yPD75217
PO2 -}———|
PHO | -
we
us Charactor
Pot aa selecting
he magnet
PHI ju}
xe |
st oy a,
Mio
ee]
st
bas
cK OS.
ane, |
Ca ag
ie
a
imet a et
STAMPmagnet
ar J-FEED magnet
<I>. iia} A-FEED magnet
alo; MOTOR
“f+ |
sco
TIMMING
GENERATOR;
HH
Fig. 28

Po2 : Print data output (seria output)
POo1 : Print data shift clock
PHO: Printer magnet data strobe signal
PHI: Printer magnet data output enable signal
M1
Print magnet drive signal
Mio
VP: Printer power
a : Printer timing signal
Mit: Receipt side magnet common
Mi2.: Journal side magnet common
Mi4_: STAMP drive
M15: Receipt feed
M16: Journal feed
Printer control procedure
Printer is controtled mainly with CPU signals PHO, PH1, PO1,
PO2, a, and P22.
1) Make P22 high to drive the motor with the CPU. This activates
VP to rotate the printer motor.
2) a (Timing Signal) from the printer allows output of the first line
print data,
8) Print data is outputted serial-parallel converted in TC4094 and
internally latched by the strobe signal of PHO.
When PH1 output enabie signal is inputted. The latched data
is outputted as M1~M16.
4) The next & is detected and procedure 3) is repeated.
T4094 internai circuit
TANF vow
vaTA ouriur
cack as
a sy
Re
a3
ue
Yes
(tor vIRE>
Timing
ornaer,
ovrivr
a
&@
&
as
&
ae
E
ee
—10—
PAARL,

7) Printer motor drive circuit VP 7 +20
BLOCK diagram VFI, VF2 : -4.3VAC
VDISP -25V
voc +5V
VDD 7 +8V
Power
leceenr {2) Regulator circuit
Fig. 2-9
pea
From wPO76212
A high on P22 of the 4PD75212 makes TRS active and TR4
inactive so that current flows through the motor to run. On the
other hand, a low on P22 turns off TR3 and turns on TR4 stop the
motor.
Fig. 2-12
8) Drawermagnet drive
1) If VO-P-ON was not shorted within the mode switch (power
off), TR1 remains inactive as no voltage is applied to the base
of TR1.
2) If VO-P-ON was shorted, TR1 goes active as voltage is added
to the base of TRI.
3) With activation of TRI, the voltage VM begins to increase.
(8) DC-DC converter
@ o
uPD75217
15K
R25
Fig, 2-10
205
De
The drawer magnet isdriven when P23 of the pPD75212 changes
®)
from low ta high state bod
Fig. 2-13
9) Power circult ‘The bias is added to the base of TRS when the power switch is
tumed on, so that TRS starts self-oscillation. VLOAD from the
(1) Block diagram secondary side is fed back through the zener diode ZD3 to
suppress voltage fluctuation on the secondary side.
Fig. 2-11
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JACNW-6891RCZZ_
244

1. ER-1921/2396
1. TEST FUNCTIONS (ER-1921/2396)
1-1. Start of test function
The following key operation is required in the SRV1 mode to start the
test.
XXXX [TL] or [CAVAT
T
Test command
time.
1-2, List of test commands
Test No. | Test command Test description
1 1 Clerk/Made switch test
2 bois Keyboard test
3 3 Display and buzzer test
L 4 4 Receipt ON/OFF switch test
mate Drawer open test (The code 6 to 8
at are for optional drawers)
ba a) Continious print tes
10, 11 ROM test
RAM test
Key position code test
10 bug ‘Sequential test-1
1 XXXX22 Sequential test-2 (drawer open
ba | sensor disregarded)
Note: "1XXXX: ‘Sum check data for standard key layout
EA-1921 + 1519
ER-2396 — 1589
NOTE-1: Test message is printed on both the receipt and journal
NOTE-2; The contents of the totalizer and the preset values are not
erased by the test.
Test function
1) Test No.1: Clerk and mode switch test
® Key operation
Push the clerk switch -» clerk switch E.
1 [10] or [CHAT]
‘Then, push the clerk and mode switches in the following order.
Cierk and mode switch operation Display
Clerk SW. A oi
Clerk SW. B ge
Clerk SW. D oY
Clerk SW. E oe
Mode SW PGM ot
n
@ oryoo a2
or OFF A
OPX/Z or TIME ah
i
REG u
9
x1 a
Zt 56
x2/Z2 a4
SAVI 2.08
Sag
@ Description
As the clerk and mode switch position number is displayed
check the number.
® Termination
The test can be terminated when the mode switch is tumed
to the SRV1 side from other position.
Termination print at error ———- O1E
Termination print at normal end 01
2) Test No. 2: Keyboard
© Key operation
LX, XX) X, 02 [Tor [CAAT]
Test command
Sum check data
(1) Enter the test command in succession to the sum check data
of the model.
Sum check data
Model (standard key layout)
ER-1921 1519"
ER-2596 1580"
* NOTE: Sum check data
The check sum is a decimal number obtained by
converting of the hard code hexadecimal total of all
keys.
and keys are exception.
(2)Next, push every key on the keyboard except for the receipt
and journal keys.
When the [TL] or [CAVAT] key is depressed, the termination
printout is immediately produced assuming that all keys have
been depressed,
There is no order in which the keys have to be depressed,
[Keyboard position code of model vs, key to be depressed}
[All key position code]
Fig. 1
3D| 35 139 | 1A) 3A] 2A
3E|1E |3B;0C/1C)1D
t
2F | 1F 34 | 33 | 22 15 | 36 |29 | 2B) 20) 38
oo
10 | 20 24|23}12) | 05 | 16 |17 | 0B; 09) 18
30/21 03114 13 02 | 26 [27 | 2E|2D/28
00 | 31 01; 41 04 los 07 | 0E/ 00/08

ER-1921]
Fig. 2 35 [39 11a |3A| 24
a ly’| jorlar {32} {25/27/19} |3cioa
aFlir) j34|s3|22| |45/36|29| |2c/ 38
0/20} |24}e3}12] 05/16 | 47 18
gole1; fos l14|13| [02/26 |27 28
00| 31 o1{41]. [04 }06 | 07 TL
ER-2396]
Fig. 8 aD [35 [a [1a] aa [2a
als'| [or|se|se| [25]37]19] {acl oa
ar|iF| [34|s3|22| |15|36/20| | 2c/ 38
1020] |24}2a|12| [os [16/17] | 09 18
30) 21} |03.}14]13} 02/26 |27 28
00 | 31 o1{11| foslosjo7| | cwaT
@ Description
Until the depression if the [TL] or [CA/AT} key, the sum of key
position codes is compared with the sum check data, except
for the [TL] or [(CA/AT] key.
® Termination
The test terminates with the depression of the [TL] or [CA/AT]
key and the termination printout is produced.
Termination printout 02
Termination printout with error = -—---- 02E
3) Test No. 3: Display buzzer test
© Key operation
3 [TL] or |CAVAT
® Description
Continuous beeps and display are tested,
® Termination
The beep stops with any key depression and the display
returns to show 0.00
Termination print 03
46S
4) Test No. 4; Receipt on/off switch test
© Key operation
4 [TL Jor [CAAT
® Description
The foliowing is displayed according to the focation of the
receipt on/off switch.
Display
Receipt off (contacts closed) C
Receipt on (contacts open) g
End o
@ Termination
With depression of any key, the display shows 0.00
Termination print 04
5) Test No. 5: Drawer open test (Must have drawer open sensor
kit installed)
© Key operation
X [TL] or [CAAT]
Option drawer
Option drawer
® Description
With this test, the drawer opens and its state is displayed in
the following manner:
Drawer open -+ @
Drawer closed + ¢
“C’ is displayed for the model that has no drawer sensor switch.
@ Termination
With depression of any key, the display shows 0.00
0;
eee No. 5, 6, 7,8
Termination print
6) Test No. 6: Continuous print test
@ Key operation
9 — [TL] or (CAAT
® Description
Receipt switch at OFF: Continuous printing is done.
Receipt switch atON: After a cycle of printing, the operation
terminates automaticaily.

@ Termination
When the receipt switch is turned from OFF to ON position
while printing is continuing, the test termination after a cycle of
printing.
EBi921
eaters dF
OOOCOCOOATE oo000000Ae
i 4111111188 PE1111T78>
222222220K 22222222d<
S5333335EN 33333333E>
4O4Gh Ga GT 4444444407
55555555TR 55555555TR
6666666600 6666666600
TTTTTTTTXD TTTTTTTIXG
B8R8BRsaTK BeeRseseas
99999999 EH 99999999RR
e @
a a
x x
Qo 6
1 1
2 2
by 3
4 4
5 5
Q Q
x x
8 8
9 9
4-01
000-0002A 0-01
01-03~00 000-00028
7) Test No. 7: ROM test
@ Key operation
CPU intemal! system ROM (0000H ~ OFFFH)
10 [TL] or [CWAT}
CPU intemal application ROM (8000H ~ FF7FH)
11 [TU] or (CAAT)
@ Test results
Termination print
Normal end’ At error
Seay eee tae io etna mee aT a oe
14 est t1E
8) Test No. 8:
@ Key operation
@® Description
Though readiwrite test is conducted from the address 60000H
to 7FFFH, the data is secured by saving it before the test
starts.
@ Test lesults Termination print
At normal end — 13
Error —> voree.
-~1T-
NOTE: If the CPU internal software timer interrupt was received in
a course of data write or read (verify) during this test mode, it
may affect the daia and an error max occur. Since the
problem could occur only with this test program, there is no
problem to the application software.
9) Test No. 9: Key position code read test
© Key operation
© Description
Key position of a key on the keyboard is displayed when any
key is depressed. (Hardware key contacts code. A hexadeci
mai number is converted into a decimal number before
displayd.)
The receipt and journal keys only feed paper without
displaying, and the[ TL] or {CA/AT] key is used to terminate
the test.
For key position codes display, refer to Fig.1 to 3.
@ Termination
Push thef TL] or[CA/AT] key.
Termination print 14
10) Test No, 9: Sequential test-1
© Key operation
XX, X,X, 00 >[TLor[CAAT]
Refer to 2) test No.2 for the sum check data.
@ Description
Within one second after the key operation, the test nos 1 thru
8, are able to carry out continuously.
NOTE-1: If a drawer sensor is equipped for test No. 5, the control
proceeds to a next step when the drawer is closed after
it was opened. If the sensor is not equipped, the contro}
jumps to a next step assuming it has no drawer is
installed.
NOTE-2: Simple print is done for the continuous print test of test
No. 6.
[A print example after the test]
EB2596 Ep-192t
ee EE
01-01-00
041
151902
03
04
Os
Bes ShESEh. he 01250
9876543288 987654328¢
10 i0
W 1
i3 13
4-02 =
000-0003E sooboese
= The upper four digits shows the sum of key position codes
which have been pressed in the key switch test.
@ Termination
Alltests automatically terminate upon finishing the stamp test.

11) Test No. 11: Sequential test-2
© Key operation
LXiX, XX, 22 3[jor[CAarT
Refer to 2) test No.2 for the sum check data.
@® Description
Itis similar as the test No. 10 except that it ignores the drawer
open test No. 5.
“Fa

2. CIRCUIT DESCRIPTION (ER-1921/ER-2396)
Circuit block diagram
Display: i
GMTSBGY (operator side}
QMT98G "(POP-UP side)}
Printer
CR-812A
UCR-812A
10 digit x2 *Key board | 64 key
*Mode SW}. pry2
* Clerk SW.
pPD78C11A
ROM 4K x 8
RAM 256 x 8
Driver
Drawer
Fig. 2-4
A399