Casio Qt 7300 Service Manual

							SERVICE MANUAL
ELECTRONIC CASH REGISTER
(without price)
QT-7300 (EX-963)
MAY. 2001 
						

							CONTENTS
QT-7300PAGE
1. EXPLANATION OF PRODUCT ................................................................... 1
1-1. General Description ................................................................................................... 1
1-2. System Overview ........................................................................................................ 1
1-3. Major Component ....................................................................................................... 2
1-4. Specifications .............................................................................................................3
1-5. I/O Outlets ................................................................................................................... 5
2. DISASSEMBLY ............................................................................................ 6
3. INSTALLATION ......................................................................................... 10
4. SYSTEM INSTALLATION .......................................................................... 11
4-1. CPU ............................................................................................................................ 11
4-2. DRAM ......................................................................................................................... 11
4-3. HDD ............................................................................................................................ 12
4-4. Serial Ports ................................................................................................................12
4-5. Parallel Port ...............................................................................................................12
4-6. VGA ............................................................................................................................ 12
4-7. Ethernet ..................................................................................................................... 12
4-8. Cash Drawer .............................................................................................................. 13
4-9. Keyboard ...................................................................................................................14
4-10. PS/2 Mouse ............................................................................................................... 14
4-11. External FDD ............................................................................................................. 14
4-12. Expansion Slot .......................................................................................................... 15
4-13. System O/S and Software Installation .................................................................... 15
4-14. Award BIOS Setup .................................................................................................... 16
4-15. Watchdog Function .................................................................................................. 28
4-16. Touch screen ............................................................................................................ 29
4-17. ETHERNET INTRODUCTION .................................................................................... 31
5. CIRCUIT EXPLANATIONS ........................................................................ 34
5-1. Explanations of each block ..................................................................................... 34
5-2. Block diagram ........................................................................................................... 37
5-3. Jumper setting .......................................................................................................... 38
6. DIAGNOSTIC OPERATION ....................................................................... 41
6-1. Diagnositc softwares ............................................................................................... 41
6-2. Customer display ..................................................................................................... 41
6-3. Drawer test ................................................................................................................45
6-4. Touch panel test ....................................................................................................... 46
7. TROUBLESHOOTING ............................................................................... 48
8. DATA SHEET ............................................................................................. 50
8-1. Power Supply (100W) ............................................................................................... 50
9. CIRCUIT DIAGRAM ................................................................................... 51
10. PARTS LIST ............................................................................................... 76 
						

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1. EXPLANATION OF PRODUCT
1-1. General Description
The QT-7300 is a PC-based POS terminal which integrates SVGA, 12.1 LCD panel, Touch screen, Ethernet,
USB, multi I/O ports for wide range of PC peripherals and special PC technologies like watchdog timer together
with regular POS functionality like Cash Drawer interfaces all in a single system.
The QT-7300 features desktop free standing and wall mounting for a wide variety of applications. An unique cable
management device is also provided to trim the operation environment. In conformity to IPX1 standard, water-
resistant system design is adopted. Designed by the PC and POS experts for the POS professionals, the QT-
7300 is virtually the ultimate solution for hospitality applications.
1-2. System Overview
Operator display with Touch screen
TFT color LCD
Side panel
LCD Display Contrast adjustment
Large Hinge cap (Large Hinge inside)
Cable management shroud
Main prop 
						

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1-3. Major Component
1. Touchscreen: The QT7300 features a quick-response touchscreen for keyboardless operation. The
standard touch adapted in this computer is 12.1 analog resistive type Fujitsu touchscreen. Its durability is
10 million touches in life.
2. Flat panel: To provide the best visual resolution and viewing angle, the standard display panel adapted in
the QT7300 is 12.1 active-matrix TFT passive matrix flat panel.
3. Metal front compartment: The universal mounting design of the front metal compartment is able to mount
most brands of 12.1 flat panel and the EMI issue is also considered.
4. Touchscreen controller: The RS-232 touchscreen controller shares COM1.
5. Power supply: The power supply adapted in this computer is a super-slim 100W power which meets FCC/
VDE Class B specification.
6. System control board: The system engine used is SBC8360-4M. The controller combines both notebook
and industrial computer technology to most compact and stable computer.
7. Main prop: The main prop is made up by a inner metal piece with an outside plastic clothing. It consists of
a set of strong hinges to ensure the whole unitÕs stability when a certain touch pressure is applied on the
touchscreen.
8. Cable management shroud: The shroud is made of the mixture of PC and ABS material. The only purpose
of this shroud is to hide the cables coming down from the bottom side of the chassis and to make the operation
environment look trimmed. 
						

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1-4. Specifications
Core System (Motherboard)
¥ CPU: Celeron (566MHz)
¥ System Chipset: Intel 440BX
¥ BIOS: Award BIOS
¥ System Memory: 1 x 168-pin DIMM socket, 64MB standard, upgradable to 256MB(buffered)
¥ L2 Cache: Integrated in CPU
¥ Real Time Clock : ST M48T86PC1 with built-in battery lasting 10 years
¥ Expansion Slot: PC/104 and PCI expansion capability
¥ Watchdog timer: Generate a system reset. Software programmable time interval
I/O system
Built-in Peripherals
¥ 2.5 Hard disk (designed 10 GB )
¥ 12.1 Fujitsu analog resistive touch screen assigned RS-232 controller COM1 ¥ Standard I/O: 3 x serial ports w/ power; jumper selectable
1 x parallel port, SPP/EPP/ECP
1 x external FDD Interface
1 x keyboard Interface
1 x P/S Mouse Interface
2 x USB Interface (*)
* Note: with fuse protection and complies with USB Spec. Rev. 1.1A
¥ Cash Drawer: 2 x
¥ Ethernet: 10/100 Base-T Ethernet Controller, RJ-45 connector
¥ Display controller: AGP interface controller with integrated 4MB SDRAM
¥ Dual independent display supports CRT(*) and LCD display
* Note: Applicable CRT is automatic horizontal frequency detective type only. 
						

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¥ 12.1 TFT LCD display, resolution 800 X 600
¥ IPX1 water resistant system
¥ Cable management shroud
¥ A versatile pedestal for 30 ° table standing and wall mounting
¥ Heat dispensing design
¥ One free slot for PCI expansion
¥ 100W power supply
¥ System cooling fan
¥ Dimension (main body size): 360 x 277 x 82 mm (W x H x D)
¥ Net Weight: 4.6 Kg
¥ Operating Temperature Range: 5 °C ~ 35 °C
¥ Relative Humidity:  5 % to 95 %, non-condensing System Specification
Note: 1) Specifications subject to change without notice.
2) The floppy disk drive, mouse and the P/C keyboard are designed for the engineers who are trained
to use them for installation of the QT-7300 POS terminal and are not recommended to use at
customer site as regular POS function in store hours. It may cause fail of the radiation regulation (ie.
FCC or CE). 
						

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1-5. I/O Outlets
The following diagram shows the I/O arrangement of the QT-7300.
Bottom Panel
100–230VNET VGA COM2 COM3 COM4 PRNDRW2 DRW1
COM1
12346875
1) AC power switch
2) AC inlet
3) Ethernet 10/100 Base-T
4) Second VGA
5) Expansion slot
6) 3 X COM ports
7) 2X Cash Drawers
8) Parallel port
Side Panel
K/BUSBMOUSE FDD
4123
1) External PS/2 Keyboard
2) External PS/2 mouse
3) External FDD
4) USB 
						

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2. DISASSEMBLY
To open the case
1. Place the machine up side down.
2. Release the 2 screws of the case management
shroud. Then, remove the case management shroud
4 screws of the lower case.
3. Release the 3 screws of the lower case.
4. Release the 4 screws and  the 12 screws of the lower
case.
Then, open the lower case.
The lower case
Release the 2 screws.
The case management shroud
Release the 3 screws.
Release the 4 screws. Release the 12 screws. 
						

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5. Release the 4 screws of the Metal rear bracket.
Then, remove the Metal rear bracket with the HDD
unit.
6. Remove the Riser card from themother board.
Release the 4 screws of the Aluminum separator.
Then, remove the Aluminum separator.
7. Release the 2 screws of the Drawer drive board and
remove the power connector. Then, remove the
Drawer drive board.
Release the 4 screws.
The Metal rear bracket with the HDD unit
The metal rear bracket with the HDD unit
HDD unitReleace the 4 screws.
Remove the Riser card. The Aluminum separator
Remove the power connector.
Release the 2 screws.
The Drawer drive board 
						

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8. Release the 7 screws of the connector panel and
release the 10 connector screws. Then, remove the
connector panel.
9. Remove the connector from the Touchscreen con-
troller. Then remove the Multi-I/O conversion card.
10.Release the 2 screws of the side connector cover
and the 2 connector screws. Then, remove the side
connector cover and  the  KB /Mouse/External FDD
conversion card.
Remove 10 connector screws.
Remove 2 screws.
Remove 3 screws. Remove 2 screws.
Remove the connector from the
Touchscreen controller. Remove the Multi-I/O
conversion card.
The side connector cover
Release the 2 screws.Release the 2 connector screws.The KB/Mouse/External FDD
conversion card