Olimpia CM 721/6 Plus User manual

CM 721/6 Plus
Technical Manual
Published on July, 2000
Version 1.0

CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11 1
TABLE OF CONTENTS
1. INTRODUCTION ....................................................................2
1.1 PRINCIPAL SPECIFICATION .......................................................2
1.2 BASIC FUNCTION ................................................................ 2
1.3 SYSTEM BLOCK DIAGRAM ..........................................................2
1.4 OUTLINE ....................................................................... 3
2. CIRCUIT .........................................................................4
2.1 POWER SUPPLY CIRCUIT ..........................................................4
2.2 TRANSFORMER WIRING DIAGRAM .................................................... 6
2.3 POWER SUPPLY SPECIFICATION .................................................... 6
2.4 MAIN CIRCUIT .................................................................. 7
2.4.1 CPU ....................................................................... 7
2.4.2 BEEP AND DRAWER DRIVER CIRCUITS ........................................... 9
2.4.3 RESET CIRCUIT AND POWER DOWN CIRCUIT ...................................... 9
2.4.4 DISPLAY CIRCUIT .......................................................... 10
2.4.5 PRINTER CIRCUIT .......................................................... 11
2.4.6 KEYBOARD MATRIX .......................................................... 12
3. TROUBLE SHOOTING PROCEDURE......................................................13
4. PRINTER INFORMATION.............................................................14
5. DISPLAY INFORMATION.............................................................16
6. CIRCUIT DIAGRAM ................................................................17
7. REMOVAL, RE-ASSEMBLE............................................................18
7.1 Keyboard Assembly ............................................................18
7.2 Cash Drawer Assembly .........................................................19
7.3 Cash Drawer Tray Assembly .................................................... 20
7.4 Cash Drawer Case Assembly .................................................... 21
7.5 GENERAL DRAWING of CM721/CM726 ............................................... 22

CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11 2
1. INTRODUCTION
1.1 PRINCIPAL SPECIFICATION
Primary Power 230V ± 10%, 50Hz or 60Hz ± 10%
Maximum Power Consumption 15.0W
Backed-up Power Ni_Cd Battery 3.6V, 270mAh
Printer EPSON M-42V
Microcontroller MITSUBISHI M38B57M6 24K ROM and 1K RAM
Roll Paper 58(W)*50(D) mm
Display Panel of CM721 Front Fluorescent Tube, 12 digits
Display Panel of CM726 Front and Rear Fluorescent Tube, 12 digits
Keyboard 39 KEYS
External Dimension 425(L)325(W)200(H) MM
Weight 5.0 ± 0.5Kg
1.2 BASIC FUNCTION
This kinds of ECR uses a 8-bits single chip microcontroller M38B57M6.It utilizes 24k bytes of
mask ROM On-Chip and 1K bytes of RAM On-Chip. This terminal also has a battery-backed up
clock which keeps track of the year, month, date, hour , minute and seconds.
Keyboard 39 Keys
Number of departments 6/12 Department
Number of PLU 100
Printer EPSON M-42V, 19 columns
1.3 SYSTEM BLOCK DIAGRAM
AC 230V F1,F2
BATTERY -30V,+17V P0,P10,P14-17,P3
+P6V,+6V
VCC,VBB
/RST P3,P16,P17,P20-24
P40
P32-37 P46
P43 P41,42
P44
P25,P64
P65
M38B57M6
PRINTER INTERFACE
DRAWER DRIVER
KEYBOARD
CASH DRAWER
PRINTER
DISPLAY
MOTOR DRIVER PAPER WINDING MOTOR
RESET & POWER
DOWN CIRCUIT
CONTROL LOCK
BUZZER
POWPER

CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11 3
1.4 OUTLINE

CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11 4
2. CIRCUIT
2.1 POWER SUPPLY CIRCUIT
FIG 2.1 Power Supply Circuit
+17V
+17V is used as the power source for the cash drawer and buzzer.
15.6V AC inputted into pin 1 and 2 of CN5 is rectified by diode D7,D8,D11,D12 and filtered by EC3
4700uF to become +17V DC unstable power source.
+P6V
This voltage is made from 17V. It applies to the collector of T5, a 2SD837B transistor.
It is also dropped across R25 an 2.2K ohm resistor, and D13 rated at 7.5V. This provided a bias
voltage of about 7.5V DC on the base of T5. This output voltage is filtered by EC4, a 100uF
capacitor.
+6V
This voltage is made from 17V. It applies to the collector of T6, a 2SC3242A transistor.
It is also dropped across R26 an 2.2K ohm resistor, and ZD2 rated at 6.2V. This provided a bias
voltage of about 6.2V DC on the base of T6. This output voltage is filtered by EC5, a 100uF
capacitor.
VCC (+5.0V)
The circuit generates the VCC by a diode (1S2076) to +6V. +6V applies to the “A” of D5, D5’S
Output is VCC. This voltage is used by U1(LB1268) and U3(HD14001BP).
VBB(+5.0V)
When the voltage at +6V has dropped, voltage back-up is provided by the battery.
This voltage is used by CPU and external RAM.
-30V
F1
F2
+6V
+17V+P6V
VBBVCC
＊
HEATSINK
PG
PG
＊
ZD1
HZ5C-3/RD5.6EB1
CN5
B6P-SHF-1AA
1
2
3
4
5
6D6
1S2076
C25 0.1u D11
RL102-E
R25
2.2K
CN6
B2B-XH-
A
1
2
EC2
100uF 50V
+
F3
125V/1A
T6
2SC3242A
R30
56K JP1
JUMPER
C23 0.1u
R26
2.2K
E C5 100uF /1 6V
+
D10
1S2076
D5
1S2076
R29 470
D7
R L102-E
T5
2SD837B
EC3
4700uF 35V
+
C24 0.1u R28
5.6K
D9
1S2076
D8
R L102-E
R27 470
D4
RL102-E
R31 1/2W 100 TC1
1uF/35V T
+
EC4
100uF 16V
+
FUSE(SLOW BLOW)1
250V 1A
ZD2
HZ6C-3/RD6.2EB3
F2125V/500mA
R24
10K
EC6 47uF/25V
+
D12
RL102-E
D13
RD 7. 5EB3

CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11 5
-30V
The -30V circuit uses 27V AC across pins 3 and 4 of CN5. This AC voltage is rectified by D4 a
RL102-E diode, and filtered by EC2, a 100uF capacitor.
-30V is approximately -30V DC. This voltage is used by the display and CPU.
Filament Voltage (F1, F2)
The display tube uses the filament voltage F1, F2.
Its AC input is 4.0V, and uses a ground reference -25V from the -30V circuit dropped across ZD1
and R27, R29 470 ohm register.

CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11 6
GRAY
ORANGE
YELLOW
YELLOW
ORANGE
ORANGE
RED
RED
4.45V
15.6V
27V
AC230V
50Hz
CT-63E
2.2 TRANSFORMER WIRING DIAGRAM
FIG 2.2 Transformer Wiring Diagram
2.3 POWER SUPPLY SPECIFICATION
Input-Power Consumption
Standing by Maximum 6.5 watts
Printing Maximum 15.0 watts
Output-Rated Voltage
+17V to GND Voltage 12V ± 0.85V
Ripple Less than 1.0V p-p
+P6V to GND Voltage 6.0V ± 0.2V
Ripple Less than 0.3V p-p
Stability Line regulation - Less than 0.3V
Temp regulation - Less than 0.3V
+6V to GND Voltage 6.0V ± 0.2V
Ripple Less than 0.3V p-p
Stability Line regulation - Less than 0.3V
Temp regulation - Less than 0.3V
+VCC to GND Voltage 5.0V ± 0.5V
Ripple Less than 0.1V p-p
Stability Line regulation - Less than 0.2V
Temp regulation - Less than 0.2V
-30V to GND Voltage -30V ± 2V
Ripple Less than 4.0V p-p
Stability Line regulation - Less than 8V
Temp regulation - Less than 2V
F1 to F2 Voltage 4.0V ± 0.2V AC (on -18V)
Stability Line regulation - Less than 1.0V

CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11 7
2.4 MAIN CIRCUIT
2.4.1 CPU
GENERAL DESCRIPTION
The M38B57M6 is a 8-bit microcomputer with 24K Bytes ROM, 1K Bytes RAM, and incorporate many
hardware peripherals such as an VFD controller/driver,8 bit resolution A/D converter, serial interface,
timer counter and interrupt function integrated on one chip..
FEATURES
• Number of basic instructions 71
• Memory Size 24K bytes of On-Chip mask ROM
1K bytes of On-Chip Data RAM
• Instruction execution time 0.48us (minimum instructions, at 4.19MHz)
• Supply power 2.7-5.5V
• Interrupt 21 Interrupt source
• Timers 16-bit TIMERX, 8-bit TIMER1-6
• FLD controller/driver Segment 15 to 25 lines,Digit 8 to 20 lines
• Programmable I/O ports 55
• Serial I/O Full duplex serial1,serial2
• Buzzer output 1kHZ, 2kHZ, 4kHZ(at M-clock 4.19MHZ)
• Power Saving Modes M-clock HALT ,STOP,S-clock HALT mode
• System Clock output Main system clock 4.19MHz ,subsystem clock 32.768kHz
• Package 80-pin plastic QFP(14X20mm)

CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11 8
PIN ARRANGEMENT (TOP VIEW)
FIG 2.3 CPU Pin Configurtion (Top View)
P00 to P07,P30 to P37,P10 to P17 :Fluorescent indicator panel
P20 to P27 :Key matrix Retrun(Keyboard)
P40 to P42 :Interrupt from Peripherals
P46 :Drawer
P43 : Buzzer output
P50 to P56 :ADDRESS BUS(A8 To A14)
P61 :EXTERNAL RAM ‘CS’
P62 :EXTERNAL RAM ‘WR’
P63 :EXTERNAL RAM ‘OE’
P64 :Printer solendoid drive signal
P65 :Printer motor drive signal
P70 to P77 :DATA BUS(D0 to D7)
P80 to P87 :ADDRESS BUS(A0 To A7)
XIN,XOUT :Crystal(Main)
XCOUT,XOIN :Crystal
RESET :Reset
U4
M38B57M6-183FP
P73/AN3
3
P72/AN2
4
P71/AN1
5
P70/AN0
6
P61/CNTR0/CNTR2
7
P60/CNTR1
8
P47/INT2
9
RESET
10
P91/XCOUT
11
P90/XOIN
12
VSS
13
XIN
14
XOUT
15
VCC
16
P46/T3OUT
17
P45/T1OUT
18
P44/PWM1
19
P43/BUZ01
20
P42/INT3
21
P41/INT1
22
P40/INT0
23
P17/FLD23 41 P16/FLD22 42
P74/AN4
2P75/AN5 1P20/BUZ02/FLD0 64
P21/FLD1 63 P22/FLD2 62 P23/FLD3 61 P24/FLD4 60 P25/FLD5 59 P26/FLD6 58 P27/FLD7 57 P00/FLD8 56 P01/FLD9 55
P02/FLD10 54 P03/FLD11 53 P04/FLD12 52 P05/FLD13 51 P06/FLD14 50 P07/FLD15 49 P10/FLD16 48 P11/FLD17 47 P12/FLD18 46 P13/FLD19 45 P14/FLD20 44 P15/FLD21 43
P87/PWMO/FLD39
24
P86/RTP1/FLD38 25
P85/RTP0/FLD37 26
P84/FLD36 27
VEE 28
P83/FLD35 29
P82/FLD34 30
P81/FLD33 31
P80/FLD32 32
P37/FLD31 33
P36/FLD30 34
P35/FLD29 35
P34/FLD28 36
P33/FLD27 37
P32/FLD26 38
P31/FLD25 39
P30/FLD24 40
P76/AN6
80 P77/AN7
79 P62/SRDY1/AN8
78 P63/AN9
77 P64/INT4/SBUSY1/AN10
76 P65/SSTB1/AN11
75 VREF
74 AVSS
73 P50/SIN1
72 P51/SOUT1
71 P52/SCLK11
70 P53/SCLK12
69 P54/RXD
68 P55/TXD
67 P56/SLCK21
66 P57/SRDY2/SCLK22
65

CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11 9
2.4.2 BEEP AND DRAWER DRIVER CIRCUITS
The solenoid for a drawer is activated using the signal P46 from the CPU.
This signal is normally Low, and goes High to cause the drawer to run. When P47 is High, T4 is on.
Current flow through the transistor cause the collector to be held Low, near grand potential.
The buzzer signal from the CPU P43 output is buzzer signal.
Its signal is square wave.
FIG 2.4 beep and drawer driver circuits
2.4.3 RESET CIRCUIT AND POWER DOWN CIRCUIT
The reset circuit prevents the CPU from starting to operate before the system is fully powered-up
and initialized.
Then 2uS after power is applied, reset goes high and the CPU can begin functioning.
When power in first applied to the circuit, the VBB begins charging EC1, a capacitor. While EC1 is
charge.
Once EC1 is fully charged, the voltage drops scores the capacitor.
A circuit using the +5.4V voltage generates power fall signal.
When power is on and the system is operating normally, the power fall signal stays at a high level.
The CPU watches power failure signals all the time. When power failure is detected, the CPU
commands to stop the Main clock and switch to Sub clock, under which it consumes about 20μA.
During the power failure, count up of the clock and power failure signals is kept watched.
The power failure circuit controls chip selection of the RAM and it keeps Low level under normal
condition and High level during power failure.
FIG 2.5 Reset And Power down Circuit
+17V
PG
BUZZER
BZ1
R12
4.7K
T1
2SC5395
+17V
PG
CN4
DRAWER
1
2
3
D3
RL102-E
R23 22K
T4
2SD986
+6V VBB
R16
4.7K
T3
2SC5395
R15
4.7K
R17 220
C20
0.01u
T2
2SA1993
R18 4.7K
D2
HZ5C-2
R19
4.7K
VBB
C13
0.1u EC1
1uF 50V
+
D1
1S2076
R7
100K

CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11 10
2.4.4 DISPLAY CIRCUIT
Scan signal for the display outputs from P30-P37, P14-P17 P21 of CPU. It goes to display grid
signals 1G-12G. P00-P07 and P10 indicate segment signal and these are connected to each
segment of the digit.
Along with Segment signal and Grid signal, High level segment is turned on.
I/O port of the CPU, which controls Segment, is high-voltage port and directly drives fluorescent
display.
High-voltage port is special I/O port designed for fluorescent display and Vee level (-30V) will be
output as a low level.
Front display and Rear display are connected in parallel.
FIG 2.6 Display Circuit
DIG_9
DIG_9 DIG_7
SEG_G
SEG_B
SEG_D
DIG_11
DIG_6 SEG_DP
SEG_D
SEG_B
DIG_11
SEG_COM
DIG_3 DIG_1
DIG_1 DIG_5 DIG_3
DIG_7
SEG_G
DIG_4
DIG_8
DIG_8 SEG_C
SEG_E
DIG_12 SEG_A
SEG_COM
SEG_F SEG_A DIG_12
DIG_10 SEG_E
DIG_2
DIG_10
SEG_DP DIG_2 SEG_C DIG_6 DIG_4
DIG_5
SEG_F
F2 -30V F1
F1 F2
VFD1
13-LT-14G
P3 34 P2 33 P1 32 P9 31 1G 30 2G 29 3G 28 4G 27 5G 26 6G 25 7G 24 8G 23 9G 22
10G 21 12G 16
P5 15 P4 14 P7 13 P6 12
13G 11
P13 10 P12 9 P11 8 P10 7
F1 2 F1 1 F2 40 F2 41
11G 17
P8 35
R1
0
R3
0
VFD2 13-LT-14G
P3
34 P2 33 P1 32 P9 31 1G
30 2G 29 3G 28 4G 27 5G 26 6G 25 7G 24 8G 23 9G 22 10G
21
12G
16 P5 15 P4 14 P7 13 P6 12 13G 11 P13
10 P12
9P11 8P10 7
F1
2F1 1
F2
40
F2
41
11G
17
P8
35

CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11 11
2.4.5 PRINTER CIRCUIT
The printer circuit consists of printer detect and printer drive circuit, printer timing and
detection is generated by using U3(HD14001). U1 usesd for printer driving. U1-6 drives
printer motor, the printer motor is activated by using the signal “PRINT” of CPU. The signal is
normally low, and goes high to activate the motor. U1-8 drives the printer trigger solenoid,it is
activated by “TRIG” of CPU. The paper winding motor is activated by “wind” of CPU.
CN2 socket is used for connecting printer M-42V.
No.1 pin of CN2: Trigger solenoid driver.
No.2 pin of CN2: +P6V power for trigger solenoid.
No.3 pin of CN2: +P6V power for print motor.
No.4 pin of CN2: Printer motor driver.
No.5 pin of CN2: Timing signal T from mechanical switch
No.6 pin of CN2: Reset signal R from mechanical switch.
No.8 pin of CN2: Timing sub-signal t from mechanical switch .
No.7 pin of CN2: Signal(No5,6,8)’s common power 5.4V.
FIG 2.7 printer and printer driver Circuit
+P6V
VCC
VCC
M
+-
T
P
t
PG
PG
MOTOR
TRG
MOTOR_ON_OFF
C9
1000P
C4
470P
C12
1000P
R6 47K
C6
470P
C7
1000P
C10
470P
R4 47K
R5 47K
C11
1000P
CN1
CON3
1
2
3C1
0.1u
R2
1W 47
C3
0.01u
U1
LB1268
IN1 1
IN2 2
IN3 3
GND 4 VCC
5
OUT3
6
OUT2
7
OUT1
8
U3A
HD14001BP
1
23
U3B
HD14001BP
5
64
U3C
HD14001BP
8
910
U3D
HD14001BP
12
13 11
CN2
PRINTER M42
1
2
3
4
5
6
7
8

CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11 12
2.4.6 KEYBOARD MATRIX
P16,P17,P30-P37 of CPU provide the strobe lines to keyboard,and the keyboard return
lines to P20-P24 of CPU.
FIG 2.8 Keyboard Circuit
C
REFURD
/POR
DEPT
SHIFT
CN4
ZDIG1
DIG2
X
DIG3
C
REG
PRG
Return4
Return3
Return2
Return1
ControlIn
DIG4
OFF
DIG5
DIG6
DIG7
DIG8
DIG9
DIG10
0
8
1/7 +
+% ST
PO
1
PLU
COUPON
CLEAR
FCE
6/12
2/8 -
NS#
7
-%
4
3
CASH
-/EC
9RA
3/9 X
FEED 4/10
5/11
6
CLERK
VOID
D1
1S2076ATE
1
4
3
2
0
9
C
C
C
C
C
C
CN1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
D11
1S2076AT
E
5
2
00
D2
1S2076ATE
D3
1S2076ATE
D4
1S2076ATE
D5
1S2076ATE
D6
1S2076ATE
D7
1S2076ATE
D8
1S2076ATE
D9
1S2076ATE
D10
1S2076ATE
X TI ME
CHARGE
CREDIT
CHECK
CASH

CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11 13
3. TROUBLE SHOOTING PROCEDURE
In the Event Following Abnormal Symptom Happened Upon Turning Power On
** Trouble shooting should be fixed by service personnel**
• The ECR does not respond at all, no display, no print
Actions: ( Please check the ECR in the following sequence )
a) To check electric conductivity of AC cable and AC plug.
b) To check transformer
c) To check fuse F1 at parts side.
d) To check voltages at logic PCB.
e) To check logic PCB in detail.
• The ECR prints but does not show any on display
Actions: ( Please check the ECR in the following sequence )
a) To check display tube.
b) To check the voltage of F1,F2,-30V, if they are abnormal,to check ,D4,ZD1.
c) To check transformer.
• The ECR display but printer does not print any
Actions: ( Please check the ECR in the following sequence )
a) To check connector between logic PCB to printer.
b) To check printer.
c) To check printer control circuit in PCB U1,U3.
• The ECR display erroneous figures or abnormal sign
Actions: ( Please check the ECR in the following sequence )
a) To check display connected circuit in PCB
• The printer prints abnormally
Actions: ( Please check the ECR in the following )
a) To check printer.
b) To check detector circuit of PCB, U3
• The data error in memory (the data displayed on the VFD is incorrect; the data printed is not
corresponding with what you want)
Actions: ( Please check in the following sequence )
a) To check software version resistor R8-11(confirm your version is USA or UNIVERSAL version).

CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11 14
4. PRINTER INFORMATION
• Printing Method : Character wheel type serial printer
• No. of printed columns : Maximum 19 columns(2 symbol columns are included)
• Character Types : Symbol 13 positions +1 spaces
Numeral 14 positions
• Character Size : 1.6mm(W)X2.8mm (H)
• Character Intervals
1) Between columns : between numerals 2.1mm
between numeral and symbol 2.6mm
between symbols 2.3mm
2) Between Lines : 4.6mm
• Printing Speed : (average printing speed at 6.0 VDC)
1) For 19-column printing : Typ. 0.9 line/sec)
2) For 7-column printing : Typ. 2.2 line/sec)
• Paper High quality paper of 57.5mm width
• Paper feeding : Fast feeding can be performed at typically 8.0 lines/sec
Provided with a paper free mechanism
• Inking Method : Ink roll method
• Motor
1) Terminal voltage : 6.0+0.5/-2.0VDC
Restarting-up voltage 4V or less (at 25°C)
2) Mean current : Typ. 0.25A (6.0 VDC AT 25C,19 columns 7 position shift
printing)
3) Driving : Motor shall be controlled by switching on-off Motor Drive
Signal
• Detectors : Mechanical contact point
The detectors generate the Reset signal R, Timing signal T,
and Timing Sub-signal t.
• Trigger Solenoid
1) Terminal voltage : 6.0+0.5/-2.0 VDC
2) DC resistance : 20±2 Ω
3) Drive circuit : Diode is used as current suppressor Diode should be prepared
by customers.(1S2075K equivalent)
• Connection Method
(on printer side) : By jumper wire
• Operating Temperature : 0 to 50°C
• Reliability : MCBF=700000 lines
• Terminal Assignment
Note: Terminal in detector side is numbered 1.

CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11 15
Connection Teminal No.
Trigger Solenoid (-) 1
Trigger Solenoid (+) 2
Motor (+) 3
Motor (-) 4
Timing Signal T 5
Reset Signal R 6
Common C 7
Timing Sub-Signal T 8
• Character Lay
19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
0 ０ ０ ０ ０ ０ ０ ０ ０ ０ ０ ０ ０ ０ ０ ０ ０ ０ Ｇ ＋
1 １ １ １ １ １ １ １ １ １ １ １ １ １ １ １ １ １ Ｋ Ｘ
2 ２ ２ ２ ２ ２ ２ ２ ２ ２ ２ ２ ２ ２ ２ ２ ２ ２ √ ÷
3 ３ ３ ３ ３ ３ ３ ３ ３ ３ ３ ３ ３ ３ ３ ３ ３ ３ Ｐ ◇
4 ４ ４ ４ ４ ４ ４ ４ ４ ４ ４ ４ ４ ４ ４ ４ ４ ４ Ｄ ＊
5 ５ ５ ５ ５ ５ ５ ５ ５ ５ ５ ５ ５ ５ ５ ５ ５ ５ Ｓ
6 ６ ６ ６ ６ ６ ６ ６ ６ ６ ６ ６ ６ ６ ６ ６ ６ ６ Ｍ Ｔ
7 ７ ７ ７ ７ ７ ７ ７ ７ ７ ７ ７ ７ ７ ７ ７ ７ ７ △ Ｍ
8 ８ ８ ８ ８ ８ ８ ８ ８ ８ ８ ８ ８ ８ ８ ８ ８ ８ ＋ Ｃ
9 ９ ９ ９ ９ ９ ９ ９ ９ ９ ９ ９ ９ ９ ９ ９ ９ ９ － ＝
10 － － － － － － － － － － － － － － － － －
11 ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， Ｒ －
12 ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ． ％
13 ＃ ＃ ＃ ＃ ＃ ＃ ＃ ＃ ＃ ＃ ＃ ＃ ＃ ＃ ＃ ＃ ＃ Ａ Ｅ
←Columns
←Positions

CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11 16
5. DISPLAY INFORMATION
Itron Type Name : 13-LT-14G
1) Ratings
Parameter Symbol Minimum Typical Maximum Unit
Operating Temp. To -20 - +70 ºC
Storage Temp. Ts -55 - +80 ºC
Filament Voltage Ef 3.6 4.0 4.4 Vac
Grid Voltage ec - 26.0 31.0 Vp-p
Anode Voltage eb - 26.0 31.0 Vp-p
2) Electrical Characteristics
Parameter Sym. Test Condition Minimum Typical Maximum Unit
Filament Current I f Ef=4.0 Vac
eb=ec=0V 135 150 165 mA
Grid Current I c
13G
1-12G
Ef=4.0 Vac
ec=26.0 Vp-p
eb=26.0 Vp-p
-
5.5
6.0
11
12
mA
Anode Current I b Ef=4.0 Vac
ec=26.0 Vp-p
eb=26.0 Vp-p
- 4.5 9.0 mA
Luminance L
(G) Ef=4.0 Vac ec=26.0 Vp-p
eb=26.0 Vp-p
240
( 70 ) 580 (170) - - cd/m²
( fL )
Grid Cut-off Voltage Ecco Ef=4.0 Vac
Eb=26.0 Vdc
Ec=Vary
-4.8 - - Vdc
Anode Cut-off
Voltage Ebco Ef=4.0Vac ec=26.0vp-p
eb=Vary
-4.8 - - Vdc
• Effective value at 50 or 60 Hz sine wave.
• Test Condition : Duty factor (DV) = 1/17.5
: Pluse width (tp) = 80 usec
• Unless specified. the grid and anode current are measured per each grid. When all anodes
turned on.
• With respect to center-tap of filament transformer.

CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11 17
6. CIRCUIT DIAGRAM
+P6V
VBB
+P6V
+17V
+6V
VCC
VCC
VCC
VBB
+6V
VBB
VBB
VBB
VCC
VCC
VCC
VCC
+17V
VCC
+17V
F2
F1
-30V
-30V
F1
F2
F1
F2
-30V
M
+-
T
P t
1 2 3 4 5 6
1 2 3 4 5 6
FUSE 250V 250mA CT-63A
AC115V
60Hz
PG
PG
PG
HEAT SI NK
PG
PG
For AMERICA
For EUROPE
R8, 10
○ ×
R9, 11 R8, 10
×
R9, 11
○
＊
＊
PG
PRINTERM42
MOTOR TRG
SEG_DP
SEG_C
SEG_G
SEG_F
SEG_B
SEG_A
SEG_D
SEG_E
SEG_COM
DIG_10
DIG_1
DIG_2
DIG_3
DIG_4
DIG_5
DIG_6
DIG_7
DIG_8
DIG_9
DIG_12
DIG_11
SEG_E
SEG_D
SEG_A
SEG_B
SEG_F
SEG_G
SEG_C
SEG_DP
SEG_COM
DIG_10
DIG_1
DIG_2
DIG_3
DIG_4
DIG_5
DIG_7
DIG_9
DIG_8
DIG_6
DIG_12
DIG_11
DIG_10
DIG_9 DIG_8 DIG_7 DIG_6 DIG_5 DIG_4 DIG_3 DIG_2 DIG_1
A4 A5 A7 A6 A9
A10 A11 A12 A13 A14
A8
RAM_OE# RAM_CS# RAM_WE#
A5
DIG_3
CTL_IN
D1
A3
A11
A0
DIG_4
P57
SEG_G
A0
P22
A1
A8
D6
SEG_F
A14
P60
A6
SEG_C
SEG_A
DIG_11 A10
MOTOR
DIG_10
D4 D6
P27
P21
RAM_CS#
D1
DIG_1
D2
DIG_6
MOTOR_ON_OFF
A2
D0 D5
DIG_12
SEG_E
A3
D7
SEG_B
P45
P23
A4
RAM_OE#
A1
D3 RAM_WR#
DIG_2
P20
A9
D4 D5
SEG_DP
DIG_7
D2
A7
A13
DIG_8
SEG_D
D7
DIG_5
SEG_COM
P45 P60
D0
A12
P26
DIG_9
MOTOR_ON_OFF
A2 D3
TRG
C19
0.1u
C9
1000P
C4
470P
C12
1000P
R6
47K
C6
470P
C7
1000P
C10
470P
R4
47K R5 47K
C11
1000P
C5
1000P
EC2
100uF 50V
+
CN5
B6P- SHF -1AA
1 2 3 4 5 6
R30
56K
R29
470
D4
RL102-E
CN6
B2B- XH-A
1 2
R27
470
CN1
B3B-XH-A
1 2 3
C1
0.1u
R2
1W 47
C3
0.01u
ZD1HZ 5C-3 /RD5. 6EB1
R25
2. 2K
R28
5. 6K
TC1
1uF/35V T
+
T6
2SC3242A
D8
RL102-E
D11
RL102-E
C24
0.1u ZD2
HZ6C-3/ RD6. 2EB3
D12
RL102-E
EC5
100uF/16V
+
EC3
4700uF 35V
+
FUSE(SLOWBLOW)1
250V 1A
C25 0.1u
R26
2. 2K
T5
2SD837B D13 RD7. 5EB3
D6
1S2076
RA3
10K x 4
2 1
3
4
5
C15
1000P
C18
1000P
PS1740P02
BZ1
T1
2SC5395
R12
4. 7K
C23 0.1u
D7
RL102-E
EC4
100uF 16V
+
U1
LB1268
IN11 IN22 IN33
GND4
VCC
5
OUT3
6
OUT2
7
OUT1
8
EC6
47uF/25V
+
D5
1S2076
R3
1.2
R1
0
C16
1000P
C13
0.1u
EC1
1uF 50V
+
D1
1S2076
R7
100K
R16
4. 7K
T3
2SC5395
R15 4. 7K
R17
220
C20
0.01u
T2
2SA1993
R18
4. 7K
D2
HZ5C-2
C8
0.1u
R24
10K
VFD2
13-LT-14G
P3 34
P2 33
P1 32
P9 31
1G 30
2G 29
3G 28
4G 27
5G 26
6G 25
7G 24
8G 23
9G 22
10G 21
12G 16
P5 15
P4 14
P7 13
P6 12
13G 11
P13 10
P12 9
P11 8
P10 7
F1 2
F1 1
F2 40
F2 41
11G 17
P8 35
VFD1
13-LT-14G
P3
34 P2
33 P1
32 P9
31 1G
30 2G
29 3G
28 4G
27 5G
26 6G
25 7G
24 8G
23 9G
22 10G
21
12G
16 P5
15 P4
14 P7
13 P6
12 13G
11 P13
10 P12
9P11
8P10
7
F1
2F1
1
F2
40
F2
41
11G
17
P8
35
R19
4. 7K
U2
IS62C256-70U
A0
10
A1
9
A2
8
A3
7
A4
6
A5
5
A6
4
A7
3
A8
25
A9
24
A10
21
A11
23
A12
2
A13
26
A14
1
OE
22
CS
20
WE
27
D1 11 D2 12 D3 13 D4 15 D5 16 D6 17 D7 18 D8 19
VCC
28 GND14
R20
10M
R22 100K
X1
32.768KHz
C21 15P
C22 30P
CR1
KBR4.0MKS
1 3
2
C2
0.1u
R11
10K
R10 10K
R9
10K
R810K
RA1
4.7K x 4
21 3
4
5
RA2
10K x 8
21 3
4
5
6
7
8
9
U3BHD14001BP
5 64
U3CHD14001BP
8 910
U3D
HD14001BP
12 13 11
JP1
JUMPER
D10
1S2076
R31
1/ 2W 100
CN2
HBRN8S-2
1 2 3 4 5 6 7 8
R14
4. 7K
R32
1K
T4
2SD986
R23
4. 7K
EC7
1000uF /10V
+
R21
3. 3K
CN4
B3P-SHF-1AA
1 2 3
R33
1. 2K
D3
RL102-E
F2 125V/500mA
F3 125V/1A
C14 1000P
C17 1000P
CN3
HBRN9S-2/HBRN6S-2
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15
D9
1S2076
U4
M38B57M6-183FP
P73/AN3
3
P72/AN2
4
P71/AN1
5
P70/AN0
6
P61/CNTR0/CNTR2
7
P60/ CNTR1
8
P47/ INT2
9
RESET
10
P91/XCOUT
11
P90/XOIN
12
VSS
13
XIN
14
XOUT
15
VCC
16
P46/T3OUT
17
P45/T1OUT
18
P44/PWM1
19
P43/BUZ01
20
P42/ INT3
21
P41/ INT1
22
P40/ INT0
23
P87/PWMO/FLD39
24
P86/RTP1/FLD38
25
P85/RTP0/FLD37
26
P84/FLD36
27
VEE
28
P83/FLD35
29
P82/FLD34
30
P81/FLD33
31
P80/FLD32
32
P37/FLD31
33
P36/FLD30
34
P35/FLD29
35
P34/FLD28
36
P33/FLD27
37
P32/FLD26
38
P31/FLD25
39
P30/FLD24
40 P17/FLD23 41
P16/FLD22 42
P74/AN4
2P75/AN5 1P76/AN680
P77/AN779
P62/SRDY1/AN878
P63/AN977
P64/INT4/SBUSY1/ AN10 76
P65/SSTB1/AN11 75
VREF 74
AVSS 73
P50/ SI N172
P51/SOUT1 71
P52/ SCLK11 70 P53/ SCLK12 69
P54/RXD 68
P55/TXD 67
P56/SLCK21 66
P57/ SRDY2/ SCLK22 65
P20/BUZ02/FLD064
P21/ FLD163 P22/ FLD262 P23/ FLD361 P24/ FLD460 P25/ FLD559 P26/ FLD658 P27/ FLD757 P00/ FLD856 P01/ FLD955
P02/FLD10 54 P03/FLD11 53 P04/FLD12 52 P05/FLD13 51 P06/FLD14 50 P07/FLD15 49 P10/FLD16 48 P11/FLD17 47 P12/FLD18 46 P13/FLD19 45 P14/FLD20 44 P15/FLD21 43
U3AHD14001BP
1 23
C26
1000P
RA4
10K x 4
2 1 3 4 5
R13
10K

CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11 18
7. REMOVAL, RE-ASSEMBLE
7.1 Keyboard Assembly
Removal:
1) Unscrew the 5-screws (10), 10 screw (1) and remove keyboard PCB (2), rubber key (4).
2) Remove 1 double key cap (9) and 1 double key-top (6) and 12 number keys (13)~(24).
3) Remove the 26-transparency key caps (11), key label (7) or (8) and 26 single key-tops (12).
4) Unscrew the 2-screws (27) and remove control lock (26).
Re-assemble:
Reverse the procedure described above.

CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11 19
7.2 Cash Drawer Assembly
Removal:
1) Remove cash drawer tray (2)
Re-assemble:
Reverse the procedure described above.