Sharp ER-A770 User manual

MODEL ER-A770
(For "V" version)
CHAPTER 1. SPECIFICATIONS ................................................................1 - 1
CHAPTER 2. OPTIONS..............................................................................2 - 1
CHAPTER 3. SERVICE PRECAUTION......................................................3 - 1
CHAPTER 4. SRV RESET (Program LoopReset)and switchtoSRVmode...4 - 1
CHAPTER 5. MASTER RESET ..................................................................5 - 1
CHAPTER 6. DIAGNOSTICS SPECIFICATIONS.......................................6 - 1
CHAPTER 7. CIRCUIT DESCRIPTION......................................................7 - 1
CHAPTER 8. CIRCUIT DIAGRAM..............................................................8 - 1
CHAPTER 9. PWB LAYOUT.......................................................................9 - 1
PARTS GUIDE
CONTENTS
Parts marked with " " are important for maintaining the safety of the set. Be sure to replace these parts with specified
ones for maintaining the safety and performance of the set.
SHARP CORPORATION This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
SERVICE MANUAL

CHAPTER 1. SPECIFICATION
1. Apearance
External view
Front view
Rear view
2. Rating
External dimensions 290 (W) 365 (D) 282 (H) mm
Weight 5.5 kg
Power source Official voltage and frequency
Power consumption Stand-by: 26W
Operating: 32W (max.)
Working temperatures 0 to 40 °C
3. Keyboard
1) Standard keyboard layout
2) Key top name
Standard key top
KEY TOP DESCRIPTION
0 ~ 9,000,00 Numeric keys
Decimal point key
CL Clear key
Multiplication key
VAT SHIFT Value-added tax shift key
RF Refund key
VOID Void key
PLU / SUB Price lookup / Subdepartment key
1 ~ 96 Direct price look up key
L1 ~ L3 PLU level shift 1 ~ 3 keys
FINAL Tentative finalization key
MISC FUNC Miscellaneous function key
MODE Mode menu key
ENTER Enter key
AUTO1,2 Automatic sequencing 1 and 2 keys
CR# Credit menu key
CH# Check menu key
ST Subtotal key
TL Total key
PAGE UP Page up key
PAGE DOWN Page down key
Cursor right key
Cursor left key
Cursor up key
Cursor down key
CANCEL Cancel key
WITH With key
WITH OUT Without key
TEXT1 ~ 6 Direct text 1 ~ 6 keys
PRICE SHIFT 1 ~ 3 Price level shit 1 ~ 3 keys
GC RCPT Guest check receipt key
GUEST # Guest number entry key
OPENED GLU Opened GLU list key
GLU Guest lookup key
NBAL New balance key
TRANS OUT Transfer out key
TRANS IN Transfer in key
Operator display
Keyboard
Switch cover Contrast control
Clerk switch
Left side
of the
machine
Power switch
Insure that the power
switch is placed in the
OFF position prior to
connecting AC power.
Brightness
control
Power switch
Rear cover
12
11
10
9
8
7
6
5
4
3
2
1
24
23
22
21
20
19
18
17
16
15
14
13
36
35
34
33
32
31
30
29
28
27
26
25
48
47
46
45
44
43
42
41
40
39
38
37
60
59
58
57
56
55
54
53
52
51
50
49
72
71
70
69
68
67
66
65
64
63
62
61
84
83
82
81
80
79
78
77
76
75
74
73
96
95
94
93
92
91
90
89
88
87
86
85
TEXT
1TEXT 2TEXT 3
TEXT
4TEXT 5TEXT 6
MISC
FUNC
GC
RCPT
TRANS
OUT TRANS IN VAT
SHIFT
WITH
OUT
PRICE
SHIFT3
PRICE
SHIFT2
PRICE
SHIFT1
ENTER
CANCEL
ST TL
BS BT
VOID RF
GLU
WITH
L1
L2
L3
SLIP
FINAL
NBAL
GUEST
#
CR
#
CH
#
PAGE
UP PAGE
DOWN
PLU/
SUB
AUTO
1
AUTO
2
MODE
•
00 0 000
CL
789
456
123
OPENED
GLU

KEY TOP DESCRIPTION
SLIP Slip print key
BS Bill separation key
BT Bill totalize / Bill transfer key
Optional key top
KEY TOP DESCRIPTION
97 ~ 135 Direct price look up keys
1 ~ 99 Department keys
%1 ~ %9 Percent 1 ~ 9 keys
1 ~ 9 keys Discount 1 ~ 9 keys
CR1 ~ CR8 Credit 1 ~ 8 keys
CA2 Cash total 2 key
RA1,RA2 Received on account 1 and 2 keys
PO1,PO2 Paid out 1 and 2 keys
AUTO3 ~ AUTO25 Automatic sequencing 3 ~ 25 keys
CH1 ~ CH4 Check 1 ~ 4 keys
CASH TIP Cash tip key
TIP PAID Tip paid key
# Non-add code entry key
NS No-sale key
MGR# Manager code entry key
OPEN TARE Tare entry Key
REPEAT Repeat entry key
PERSON# Person number entry key
IND. PAYMENT Individual payment key
RCP. SW Receipt ON / OFF key
SCALE Scale entry key
TEXT 7 ~ 40 Text 7 ~ 40 keys
EX1 ~ 9 Foreign currency exchange 1 ~ 9 keys
AMT Amount entry key
DRV NC New check 2 key (For drive-thruogh)
DRV GLU Guest look up 2 key (For drive-through)
VAT Value-added tax key
NON-CASH TIP Non-cash tip key
1/2 1/2 key
CLERK# Clerk code entry key
RCPT Receipt print key
PINT Pint key
DEPO(+) Deposit plus entry key
DEPO(–) Deposit minus entry key
TEXT# Text number key
EMP# Employee key
TIME IN Time in key
SBTL VOID Subtotal void key
TIME OUT Time out key
BREAK IN/OUT Break in/out key
VP Validation print key
RTN Return key
DEPT SHIFT 1 ~ 4 Department shift 1 ~ 4 keys
DIFFER ST Difference subtotal key
C.BILL Cumulated bill key
GC COPY Guest check copy key
EX# Foreign currency exchange menu key
VIP VIP sale key
H.T. Hotel transfer key
CLK1 ~ 10 Clerk entry 1 ~ 10 keys
CHECK PRINT Check print key
BACK SPACE Back space key
DEL Delete key
L4 ~ L10 PLU level shift 4 through 10 keys
KEY TOP DESCRIPTION
PRICE SHIFT 4 ~
PRICE SHIFT 7 Price level shift 4 through 7 keys
PLU MENU 01 ~
PLU MENU 50 PLU menu 1 through 50 keys
WASTE WASTE mode key
WAIT WAIT mode key (for drive-thru)
RECALL Re-call key (for drive thru)
C_NEXT Condiments next key
D_DISP Drive-thru menu key
E. BILL Entertainment bill key
RC TTL Recall TOTAL STATUS key
3) Text programming key sheet layout
: The shaded area contains the character keys which are
used for programming characters.
KEY TOP DESCRIPTION
SHIFT Used for programming characters. For more
information about programming characters,
see the section "How to Enter Alphanumeric
Characters."
DC
INS
DEL
BACK SPACE
[], [ ], [ ], [ ] Used to move the cursor.
ENTER Used to program each setting.
TL Used to finalize programming.
CANCEL Used to cancel programming and to get back
to the previous screen.
MODE Used for changing the operating mode.
PREV RECORD Used to go back to the previous record, e.g., from the department 2 programming window
back to the department 1 programming window.
NEXT RECORD Used to go to the next record, for example, in order to program unit prices for sequential
departments.
PAGE DOWN Used to scroll the window to go to the next
page.
PAGE UP Used to scroll the window to go back to the
previous page.
CL Used to clear the last setting you have
programmed or clear the error state.
Used to toggle between two or more options.
ST Used to list those options which you can toggle
by the key.
RECALL Used to call up a desired code.
Numeric keys Used for entering figures.
BACK
SPACE
Prev.
Record
Next
Record
(CANCEL)
(SHIFT) (SHIFT)
(SPACE) (SPACE) (SPACE) (SPACE) (SPACE) (SPACE)
(ENTER)
PAGE
DOWN
PAGE
UP
(MODE)
(INS)
(DEL)
(RECALL)
(DC)
•
A
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HJKL
ERTY
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Ñ Ø
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-
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1/2 1/4 3/4 Æ û
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ù ú Ç Å £
3
2
1
4 5 6 7 8 9 0
©
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Helvetica/ Helvetica-Condensed/ Century-Schoolbook/ Symbol & OriginalFonts: (RingWorld2/RingFont2/Pa
Symbol/PartsCod)
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

4) Blank key sheet layout
3. Display
1) Operator display
Screen example 1 (REG mode)
Prive level shift indica-
tor (P1-P7) : Shows the PLU price level currently
selected.
PLU level shift indicator
(L01-L10) : Shows the PLU level currently se-
lected.
Stock alarm indicator
(!) : Appears when the stock of the PLU
which you entered is zero or negative.
Department shift status
indicator (D1-D4) : Shows the department shift status cur-
rently selected.
VAT shift status indica-
tor (V) : Appears when the VAT status is
shifted.
Receipt ON/OFF status
indicator (R) : Appears when the receipt ON-OFF
function signs OFF.
Sentinel mark (X) : Appears in the lower right corner of
the screen when the cash in drawer
exceeds a programmed sentinel
amount.
The sentinel check is performed for
the total cash in drawer.
Screen example 2 (PGM mode)
Screen save mode
When you want to save the electric power or save the display’s
life, use the screen save function. This function can turn the LCD
backlight off when any server does not operate the POS terminal
for an extended period of time. You can program the time for
which your POS terminal should keep the normal status (in which
the backlight is "ON") before it goes into the screen save mode.
To go back to the normal mode, press any key.
Device type LCD display
Dot format 320(W) 240(H) Full dot
Dot size 0.33 0.33 mm
Dot space 0.03 mm
Dot color White
Back color Dark blue
Weight 180 g
2) Display adjustment
You can adjust the brightness and contrast of the display by using the
corresponding controls.
Mode name
Clerk code
Time
Numeric entry:
Entered figures appear at
the cursor position.
Window:
In the REG mode, the window shows sales information you have
just entered such as items and media types.
Received media type
Sales amount including taxes
Clerk code
Mode name
Time
Double-size character mode indicator (W):
Appears when the double-size character
mode is selected during text programming.
Window
In the PGM mode,
programmable items are listed.
Caps lock indicator (A/a):
The upper-case letter "A" appears when
Caps Lock is on, and the lower-case
letter "a" appears when Caps Lock is off
during text programming.
Contrast control
Turning the control backwards
darkens the display and turning
it forwards lightens the display.
Brightness control
Turning the control backwards
darkens the display and turning it
forwards brightens the display.

4. Clerk Keys
This POS terminal allows the operator to use the following four clerk
identification systems :
Real clerk keys (standard 6 clerks / max. 126 clerks)
Clerk code entry (max. 255 clerks)
Clerk entry keys (max. 10 clerks)
WMF clerk keys (max. 127 clerks)
The standard POS terminal has been shipped with the real clerk key
system being programmed. If you want to change the clerk identifica-
tion system, contact your authorized SHARP dealer
Real clerk keys (1, 2, 3, 4, 5, and 6)
These keys serve to identify clerks. Put one of the 1 through 6 keys in
the clerk switch.
Clerk code entry (1 through 9999)
Enter the clerk code by using the following procedure :
Clerk entry keys
These keys identify clerks. Press any one of these keys.
WMF clerk keys
Put one of the WMF clerk keys in the WMF clerk switch.
XXXX
Clerk code
CLERK
#
CLK
1CLK
10

INLINE Communication
Expansion
memory
board
<Option>
UP-P02MB2
PC
<Local purchase>
EFT Terminal
<Local purchase>
Satelite
(RS-232)
(SRN)
Mastermachine
Remote
Drawer
<Option>
ER-03DW/
04DW/05DW
MCR
<Option>
UP-E12MR
Pole Display
<Option>
UP-P16DP
R/J Printer
<Option>
ER-01PU
RS-232 Communication
RS-232 Board <Option> ER-A7RS
EFT VF Board <Option> ER-02EF
Remote Printer
<Option>
ER-04RP/03RP
PC
<Local purchase>
Customer Display
<Option>
UP-I16DP
Drink Dispenser
<Local purchase>
Scale
<Local purchase>
CAT
<Local purchase>
CHAPTER 2. OPTIONS 1. System configuration

2. Sales Options
No. CLASSIFICATION COMPONENT NAME MODEL NAME REMARK
1Printer External R/J printer ER-01PU Via RS-232 I/F
Remote printer ER-03RP Via SRN I/F
ER-04RP
2Display Remote display (Pole type) UP-P16DP 11-Dig. 7-Seg. +16-Dig. Dot
Customer display UP-I16DP 11-Dig. 7-Seg. +16-Dig. Dot
3
Drawer Remote drawer ER-03DW
ER-04DW
ER-05DW
Coin case ER-48CC2 4B/8C
ER-48CC3 4B/8C
ER-58CC2 5B/8C
Coin case cover ER-01CV1-5
ER-02CV1-5
ER-03CV
4 Memory Expansion RAM disk board UP-P02MB2 2M bytes PS-RAM board
5 On-line function RS232 I/F board ER-A7RS 2 ports RS232 I/F
6OTHER MCR (Magnetic Card Reader) UP-E12MR for ISO 1 & 2 stripe card
EFT terminal I/F ER-02EF
3. Local purchase options
No. COMPONENT NAME MODEL NAME
1External printer TM-T85/T88
TM-U210
2Slip printer TM-U295
TM-H5000
3ScaleI/F
4 Drink Dispensor
4. Service options
No. NAME PARTS CODE DESCRIPTION
1 1 hole clerk key
The key No.1 to No.6 ore supplied together with ER-A770. Key No. 7
Key No. 8
Key No. 9
Key No. 10
Key No. 11
Key No. 12
Key No. 13
Key No. 14
Key No. 15
Key No. 16
Key No. 17
Key No. 18
Key No. 19
Key No. 20
Key No. 21
Key No. 22
Key No. 23
Key No. 24
Key No. 25
Key No. 26
Key No. 27
Key No. 28
>>>>> USE FONT <<<<<
Helvetica/ Helvetica-Condensed/ Century-Schoolbook/ Symbol & OriginalFonts: (RingWorld2/RingFont2/Pa
Symbol/PartsCod)
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

No. NAME PARTS CODE DESCRIPTION
1 1 hole clerk key
The key No.1 to No.6 ore supplied together with ER-A770. Key No. 29
Key No. 30
Key No. 31
Key No. 32
Key No. 33
Key No. 34
Key No. 35
Key No. 36
Key No. 37
Key No. 38
Key No. 39
Key No. 40
Key No. 41
Key No. 42
Key No. 43
Key No. 44
Key No. 45
Key No. 46
Key No. 47
Key No. 48
Key No. 49
Key No. 50
Key No. 51
Key No. 52
Key No. 53
Key No. 54
Key No. 55
Key No. 56
Key No. 57
Key No. 58
Key No. 59
Key No. 60
Key No. 61
Key No. 62
Key No. 63
Key No. 64
Key No. 65
Key No. 66
Key No. 67
Key No. 68
Key No. 69
Key No. 70
Key No. 71
Key No. 72
Key No. 73
Key No. 74
Key No. 75
Key No. 76
Key No. 77
Key No. 78
Key No. 79
Key No. 80
Key No. 81
Key No. 82
Key No. 83
Key No. 84
Key No. 85
Key No. 86
Key No. 87
Key No. 88

No. NAME PARTS CODE DESCRIPTION
1 1 hole clerk key
The key No.1 to No.6 ore supplied together with ER-A770. Key No. 89
Key No. 90
Key No. 91
Key No. 92
Key No. 93
Key No. 94
Key No. 95
Key No. 96
Key No. 97
Key No. 98
Key No. 99
Key No. 100
Key No. 101
Key No. 102
Key No. 103
Key No. 104
Key No. 105
Key No. 106
Key No. 107
Key No. 108
Key No. 109
Key No. 110
Key No. 111
Key No. 112
Key No. 113
Key No. 114
Key No. 115
Key No. 116
Key No. 117
Key No. 118
Key No. 119
Key No. 120
Key No. 121
Key No. 122
Key No. 123
Key No. 124
Key No. 125
Key No. 126
5. Service tools
No. NAME PARTS CODE PRICE DESCRIPTION
1 Terminator(50 )AZ for SRN in-line system
2 MCR test card BE for UP-E12MR
3 RS232 loop back connector BC for RS232 connector
4 Expansion PWB BX
6. Supplies : None
No. NAME PARTS CODE PRICE
1 Blank key sheet AQ

7. How to use service tools
7-1. Expansion PWB : CKOG-6724BHZZ
Extrenal view
Plain view
Connection diagram
7-2. MCR test card: UKOG-6718RCZZ
Used when executing the diagnostics of the UP-E12MR.
External view
Test pins : Used to check the bus signals.
Bus connector : Used to check the bus signals.
Connected to the UP-3300 Mother PWB.
ER-A770 bus connector
ER-A7RS