Page 1
CM 721/6 Plus
Technical Manual
Published on July, 2000
Version 1.0
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CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11
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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
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CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11
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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
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CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11
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1.4 OUTLINE
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CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11
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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
＊
HEAT SINK
PG
PG
＊
ZD1
HZ5C-3/RD5.6EB1
CN5
B6P-SHF-1AA
1
2
3
4
5
6
D6
1S20 76
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 100 uF /1 6V
+
D10
1S 20 76
D5
1S20 76
R29 470
D7
R L 10 2-E
T5
2SD837B
EC3
4700 uF 3 5V
+
C24 0.1u
R28
5.6K
D9
1S 20 76
D8
R L 10 2-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
F2
125V /500 mA
R24
10K
EC6 47uF/25V
+
D12
RL102-E
D13
RD 7. 5E B3
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CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11
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-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.
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CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11
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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
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CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11
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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)
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CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11
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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/AN33P72/AN24P71/AN15P70/AN0
6
P61/CNTR0/CNTR27P60/CNTR1
8
P47/INT2
9
RESET10P91/XCOUT
11
P90/XOIN
12
VSS
13
XIN
14
XOUT15VCC16P46/T3OUT17P45/T1OUT18P44/PWM119P43/BUZ01
20
P42/INT321P41/INT122P40/INT0
23
P17/FLD2341P16/FLD22
42
P74/AN42P75/AN5
1
P20/BUZ02/FLD0
64
P21/FLD163P22/FLD262P23/FLD361P24/FLD460P25/FLD559P26/FLD658P27/FLD757P00/FLD856P01/FLD9
55
P02/FLD1054P03/FLD1153P04/FLD1252P05/FLD1351P06/FLD1450P07/FLD1549P10/FLD1648P11/FLD1747P12/FLD1846P13/FLD1945P14/FLD2044P15/FLD21
43
P87/PWM O/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
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CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11
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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
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CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11
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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
P334P233P132P9311G302G293G284G275G266G257G248G239G
22
10G
21
12G
16
P515P414P713P6
12
13G
11
P1310P129P118P10
7
F12F1
1
F240F2
41
11G
17
P8
35
R1
0
R3
0
VFD2
13-LT-14G
P334P233P132P9
31
1G302G293G284G275G266G257G248G239G
22
10G
21
12G16P515P414P713P61213G
11
P1310P129P118P10
7
F12F1
1
F240F2
41
11G
17
P8
35
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CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11
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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
3
C1
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
2
3
U3B
HD14001BP
5
6
4
U3C
HD14001BP
8
9
10
U3D
HD14001BP
12
13
11
CN2
PRIN TER M42
1
2
3
4
5
6
7
8
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CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11
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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
REF UR D
/POR
DEPT
SHIFT
CN4
ZDIG1
DIG2
X
DIG3
C
REG
PRG
Return4
Return3
Return2
Return1
Control In
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
1S20 76ATE
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
1S20 76A T
E
5
2
00
D2
1S2076ATE
D3
1S20 76A TE
D4
1S20 76A TE
D5
1S2076ATE
D6
1S20 76ATE
D7
1S20 76ATE
D8
1S20 76A TE
D9
1S20 76A TE
D10
1S20 76A TE
X TI M E
CHARGE
CREDIT
CHECK
CASH
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CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11
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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).
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CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11
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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
• T erminal Assignment
Note: Terminal in detector side is numbered 1.
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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
Page 17
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.
Page 18
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
12345
6
12345
6
FUS E
250V 250mA
CT-63A
AC115V
60Hz
PG
PG
PG
HEAT SINK
PG
PG
For AMERICA
For EUROPE
R8, 1 0
○
×
R9, 1 1
R8, 1 0×R9, 1 1
○
＊
＊
PG
PRINTER M42
MOTOR
TRG
SEG_D P
SEG_C
SEG_G
SEG_F
SEG_B
SEG_A
SEG_D
SEG_E
SEG_C OM
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_D P
SEG_C OM
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
A4A5A7A6A9
A10
A11
A12
A13
A14
A8
RAM_OE#
RAM_CS#
RAM_WE#
A5
DIG_3
CTL_I N
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_O N _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
1000 P
R6
47K
C6
470P
C7
1000 P
C10
470P
R4
47K
R5
47K
C11
1000 P
C5
1000 P
EC2
100u F 50 V
+
CN5
B6P- SHF- 1AA
12345
6
R30
56K
R29
470
D4
RL102-E
CN6
B2 B-XH- A
1
2
R27
470
CN1
B3B-XH-A
123
C1
0.1uR21W 47
C3
0.0 1u
ZD1
HZ5C-3/ RD5.6EB1
R25
2. 2K
R28
5. 6K
TC1
1uF/35V T
+
T6
2SC32 42 A
D8
RL102-E
D11
RL10 2-E
C24
0.1u
ZD2
HZ6C-3/ RD6.2EB3
D12
RL10 2-E
EC5
100uF/16V
+
EC3
4700uF 35V
+
FUSE(SLOW BL OW)1
250V 1A
C25
0.1u
R26
2. 2K
T5
2SD83 7B
D13
RD7.5EB3
D6
1S2076
RA3
10K x 4
2 1
3
4
5
C15
1000 P
C18
1000 P
PS17 40 P0 2
BZ1
T1
2SC5 39 5
R12
4. 7K
C23
0.1u
D7
RL102-E
EC4
100uF 16V
+
U1
LB1268
IN11IN22IN3
3
GND
4
VCC5OUT36OUT27OUT1
8
EC6
47uF /25V
+
D5
1S2076
R3
1.2
R1
0
C16
1000 P
C13
0.1u
EC1
1uF 50V
+
D1
1S2076
R7
100K
R16
4. 7K
T3
2SC539 5
R15 4. 7K
R17
220
C20
0.0 1u
T2
2SA199 3
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
9
P11
8
P10
7
F1
2
F1
1
F2
40
F2
41
11G
17
P8
35
R19
4. 7K
U2
IS6 2 C256-70U
A010A19A28A37A46A55A64A73A825A9
24
A1021A1123A122A1326A14
1
OE22CS20WE
27
D111D212D313D415D516D617D718D8
19
VCC
28
GND
14
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
6
4
U3CHD14001BP
8
9
10
U3D
HD140 01BP
12
13
11
JP1
JUMPER
D10
1S2076
R31
1/ 2W 100
CN2
HBRN8S-2
1234567
8
R14
4. 7K
R32
1K
T4
2SD986
R23
4. 7K
EC7
1000 uF/1 0V
+
R21
3. 3K
CN4
B3P-SHF-1AA
123
R33
1. 2K
D3
RL10 2-E
F2 125V/500 mA
F3
125V/1A
C14
1000 P
C17
1000 P
CN3
HBRN9S-2/HBRN6S-2
123456789
1011121314
15
D9
1S2076
U4
M38B 57 M 6-18 3F P
P73/AN 33P72/AN 24P71/AN 15P70/AN 0
6
P61/CNTR0 /CNTR27P60/ CNTR1
8
P47/ INT 2
9
RESET10P91/XCOUT
11
P90/XOIN
12
VSS
13
XIN
14
XOUT15VCC16P46/T3OUT17P45/T1OUT18P44/PWM119P43/BUZ01
20
P42/ INT 321P41/ INT 122P40/ INT 023P87/PWMO/FL D3924P86/RTP1 /FLD3825P85/RTP0 /FLD3726P84/FLD36
27
VEE
28
P83/FLD3529P82/FLD3430P81/FLD3331P80/FLD3232P37/FLD3133P36/FLD3034P35/FLD2935P34/FLD2836P33/FLD2737P32/FLD2638P31/FLD2539P30/FLD24
40
P17/FLD2341P16/FLD22
42
P74/AN 42P75/AN 5
1
P76/AN 680P77/AN 7
79
P62/SRDY1/AN8
78
P63/AN 9
77
P64/ INT 4 /S B US Y1/ AN10
76
P65/SSTB1 /AN11
75
VREF
74
AVSS
73
P50/ SIN1
72
P51/SOUT1
71
P5 2/SCLK 1170P5 3/SCLK 12
69
P54/RX D
68
P55/TXD
67
P56/SLCK2 1
66
P57/ SRDY2/ SCLK 22
65
P20/BUZ0 2 /FLD 0
64
P21/ FLD163P22/ FLD262P23/ FLD361P24/ FLD460P25/ FLD559P26/ FLD658P27/ FLD757P00/ FLD856P01/ FLD9
55
P02/FLD1054P03/FLD1153P04/FLD1252P05/FLD1351P06/FLD1450P07/FLD1549P10/FLD1648P11/FLD1747P12/FLD1846P13/FLD1945P14/FLD2044P15/FLD21
43
U3AHD14001 BP
1
2
3
C26
1000P
RA4
10K x 4
2 134
5
R13
10K
Page 19
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.
Page 20
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.
Page 21
CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11
20
7.3 Cash Drawer Tray Assembly
Removal:
1) Unscrew 3 screws (2), remove 3 plastic clip assemblies (4) (5) (6).
2) Remove 2 plastic plates (8).
3) Unscrew the nut hex (13) then remove it.
Re-assemble:
Reverse the procedure described above.
Page 22
CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11
21
7.4 Cash Drawer Case Assembly
Removal:
1) Unscrew the 6-screw (4), remove (15) from others.
2) Screw off 2 nuts (3). Then remove the (2).
3) Unscrew 3-screws (8), remove (5).
4) Unscrew the screws (13), then remove (12), (14).
5) Unscrew 2-screws (6) remove all the others.
Re-assemble:
Reverse the procedure described above.
Page 23
CM721/726 TECHNICAL MANUAL VERSION 1.0 2001.9.11
22
7.5 GENERAL DRAWING of CM721/CM726
Removal:
1). Remove the printer cover (6), and unscrew 4 screws (22), 2 screws fixing to cash drawer, and 2
screws fixing to metal support (23), remove the upper housing:
a). Remove 5 screws fixing to keyboard assembly (5) and remove (5).
b). Remove display lens (15), unscrew 2 screws fixing to control lock assembly (17) and remove
them.
2). Unscrew the screws (13) and remove motor assembly (14), unscrew 4 screws fixing to
mainboard, unscrew the screw (22), remove the paper guider (21) and printer assembly (20).
Note: only front display for CM721.
Re-assemble:
Reverse the procedure described above
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