Sharp ER-A850 (serv.man2) Service Manual ▷ View online
SERVICE MANUAL
CODE: 00ZERA850VSME
MODEL
ER-A850
MODEL
ER-A880
CHAPTER 1. SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
CHAPTER 2. OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
CHAPTER 3. SERVICE PRECAUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
CHAPTER 4. ER-A850/A880 DIAGNOSTICS SPECIFICATIONS . . . . . . . . . . . 9
CHAPTER 5. CIRCUIT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
CHAPTER 6. CIRCUIT DIAGRAM & PWB LAYOUT . . . . . . . . . . . . . . . . . . . . 78
CONTENTS
SHARP CORPORATION
Parts marked with "
!
" is 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.
ER-A850
ER-A880
CHAPTER 1. SPECIFICATIONS
1. Apearance
ER-A850
ER-A880
2. Rating
External dimensions
ER-A850 290(W) x 372(D) x 242(H) mm
ER-A880 290(W) x 372(D) x 98(H)mm
ER-A880 290(W) x 372(D) x 98(H)mm
Weight
ER-A850 5.1
kg
ER-A880 4.0
kg
Power source
Official (nominal) voltage and frequency
Power consumption
Operating: 30 W
Working temperature
0°C to 40°C
3. Keyboard
Item
ER-A850
ER-A880
Type
Flat keyboard
Touch screen keyboard
Key position
156
Max. 250 (by application software)
4. Clerk key
Item
ER-A850/A880
Type
1-hole (6bit)
Number of keys
6 kinds x 2 pcs.: Standard
Max. 63 kinds: Service root option
Max. 63 kinds: Service root option
5. Display
Item
ER-A850
ER-A880
Device type
LCD display
LCD display
Color
Black & White
Black & White
Black light
Available
Available
Number of dots
640 x 200 dots
640 x 400 dots
Dot size
0.33 mm pitch
0.30 mm pitch
6. System switch
<Shipping conditions>
Switch descriptions
APLD = Application program loader
*
When executing the diagnostic program, perform the following set-
ting.
ting.
External
keyboard port
keyboard port
AC cord
Keyboard
Display
Power switch
Clerk switch
AC cord
Power switch
Clerk switch
External
keyboard
port
keyboard
port
Touch sensitive
display
display
1
2
3
4
ON
OFF
ON
1
2
3
4
SW4
OFF
ON
Function
SW3
OFF
ON
Function
SW2
OFF
ON
Function
SW1
OFF
ON
Function
Floppy disk
Disable
Enable
Hard disk or
RAM disk
RAM disk
RAM
disk
disk
Hard
disk
disk
Initialize RAM disk
at boot
at boot
Not
initialize
initialize
Initialize
1
2
3
4
ON
OFF
All ON positions
– 1 –
WIRING DIAGRAM
ER-A8RS
1
50
CON9
98P
98P
49
98
1
50
CON9
98P
98P
49
98
ISA PWB
ER-03DW
RS-232 devices
CON23
3P CON24
3P
C
O
N
21 3P
C
O
N
22 3P
P2 9P
P1 9P
CON3
100P
100P
CON6
10P
10P
ER-A8DP
CON11
2P
2P
SAN (In-line)
connector
connector
ER-03MB
or
04MB
or
04MB
Power supply
unit
unit
CO
N5
50P
CO
N1
2
10P
CON1
2P
2P
CON26
10P
10P
CO
N2
5
4P
CO
N2
6P
CO
N4
15P
CO
N7
10P
AT-keyboard
Ni-cd battery
MAIN PWB
ER-A880 LCD UNIT
640 x 400 dots
640 x 200 dots
ER-A850 LCD UNIT
CN1
44P
CN2
2P
2P
CN4
4P
4P
CN3
2P
2P
* : ER-A850: CN2,CN3
* : ER-A880: CN4
* : ER-A880: CN4
CON17
A850: 13P
A880: 25P
A850: 13P
A880: 25P
CON14
A850: 12P
A880: 10P
A850: 12P
A880: 10P
CN2
0
10P
CN2
0
8P
ER-A850
Flat keyboard
Flat keyboard
ER-A880
Tuch panel
keyboard
Tuch panel
keyboard
ER-A8MR
WMF key
CN19 12P
CON16
7P
7P
Clerk key
IOC PWB
INVERTOR PWB
CHAPTER 2. OPTIONS
1. System configuration
CUSTOMER DISPLAY(Option)
<ER-A8DP>
for displaying amount
<ER-A8DP>
for displaying amount
MCR (Option)
<ER-A8MR>
for magnetic card
<ER-A8MR>
for magnetic card
DRAWER (Oprion)
<ER-A3DW>
for holding bills and coins
<ER-A3DW>
for holding bills and coins
MEMORY BOARD (Option)
<ER-03MB> (1MB)
<ER-04MB> (2MB)
for memory expansion
<ER-03MB> (1MB)
<ER-04MB> (2MB)
for memory expansion
AT FULL KEYBOARD (Local purchase)
for maintanance program
for maintanance program
CENTRONICS PRINTER
(Local purchase)
for printing reports and accounts
(Local purchase)
for printing reports and accounts
HALF SIZED PC CARD
(Local purchase)
for enhanced system
(Local purchase)
for enhanced system
2 slots
MASTER ECR
RS-232
Stamdard: 2 port
Max.: 6 port
by local purchased
half sized PC card
INLINE
(SRN)
(SRN)
(SRN)
(RS-232C)
(GATE WAY)
(Ponding)
(Ponding)
SATELLITE ECR
for order entry
for order entry
(RS-232C)
(GATE WAY)
(Ponding)
(Ponding)
ROLL PRINTER (Local puchase)
for issuing slip bill
for issuing slip bill
PERSONAL COMPUTER/
Work station (Local purchase)
for control employee and customer
Work station (Local purchase)
for control employee and customer
REMOTE PRINTER (Option)
<ER-03RP>
for printing ordered items in kitchen
<ER-03RP>
for printing ordered items in kitchen
SRIP PRINTER (Local purchase)
by EPSON co.
for issuing slip bill
by EPSON co.
for issuing slip bill
ROLL PRINTER (Local purchase)
for printing detail registration
for printing detail registration
CAT·EFT (Local purchase)
for credit authorization
for credit authorization
PERSONAL COMPUTER (Local purchase)
for consolidating data
for consolidating data
COIN DISPENSER (Local purchase)
by TELEQUIP co.
for dispensing changeing coins
by TELEQUIP co.
for dispensing changeing coins
SCALE (Local purchase)
by TOLEDO SCALE co.
for weighting
by TOLEDO SCALE co.
for weighting
REMOTE DISPLAY (Local purchase)
for displaying store's messages
for displaying store's messages
– 2 –