Casio CE-6000 User manual

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Trouble shooting ECR V1.01
Trouble shooting guide for New ECR model
MODEL: CE-6000, CE-6100, CE-7000, TK-6000, TK-7000, TK-6500, TK-7500
< CONTENS >
1. Flowchart for trouble shooting procedures
2. Trouble shooting procedures
2-1. Mask diagnostic operation
2-2. Repair the Main P.C.Board 1
2-3. IPL loading
2-4. Normal diagnostic operation
2-5. Repair the Main P.C.Board 2
3. The example of repair
3-1. How to remove the IC
3-2. Preparation for mounting the new IC
3-3. How to fix the IC
3-4. Cleaning after mounting the IC
1. Flowchart for trouble shooting procedures
OK NG
NG
OK
START
2-1. Mask
diagnostic
Result
2-3. IPL
Loading
2-2. Repair the
Main P.C.Board 1
2-4. Normal
diagnostic
ti
Result
2-5. Repair the
Main P.C.Board 2
END
INDEX

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Trouble shooting ECR V1.01
2. Trouble shooting procedures
2-1. Mask diagnostic operation
The model CE-6000/7000 series and TK-6000/7000 series have the Mask diagnostic
operation in the machine.
The following test can be checked in the Mask diagnostic operation.
1) Flash ROM data erase after write test
2) RAM read after write test
To start the Mask diagnostic operation, perform the following operation.
START
Turn off the power switch and set the Mode switch to PGM position.
While pressing the reset switch and <JOURNAL FEED> button, turn the power switch on.
Release the reset switch first and then release the <JOURNAL FEED> button.
Then, the machine shows following code on the display.
( If it is no display, please refer the section 2-4 of page XX for repair.)
Display “EEEEEEEEEE” means the non application in Flash ROM.
If the display “EEEEEEEEEE”, please retry from START.
Display “0000000000” means waiting the IPL start command.
Input code “99990000” and press <SUB TOTAL> button.
Mask diagnostic program is started.
Flash ROM data erase operation.
Display “ XX “ XX = 00 ~ 31 1BLK = 64Kbytes
Flash ROM write test operation.
Display “ XX “ XX = 00 ~ 31 1BLK = 64Kbytes
RAM1 read/write test operation.
Display “XXX “ XXX = 1FD ~ 000 1BLK = 1Kbytes
END
Display “0000000000”. This is waiting mode for IPL code input.
If there is error, error code will be displayed.
“EX”
Display “E9X “ E91 = Flash ROM erase error.
E92 = Flash ROM write error.
E93 = Flash ROM read error.
E94 = RAM1 read/write error.
Note : If the power failure is happened during Mask diagnostic operation, the
operation will be stopped and will be “EEEEEEEEEE” display.

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Trouble shooting ECR V1.01
Special error message : Fatal error code
FErr20 Unfixed address is selected and unsettled error is happened.
FErr26 Abruption of program working. The interruption of abnormal condition
( Watch dog ) is happened.
FErr27 Stack pointer address become the except RAM address area.
Note : If this error is happened, the Flash ROM program and data is damaged.
Therefore, it is necessary to down load IPL data for ECR from a P/C or a RAM PACK.
For the error FErr20 and 27, it may occur when the local software (IPL) is developed in case the
developing time. Normally, this error is never happened in the standard IPL data.
For the error FErr26, it may occur when the hard ware has some problem like a poor soldering
at the Flash ROM pins or a spillage on the circuit of the address and data bus line.
In this case, please clean the PCB and try to re-solder the Flash ROM pins and try to down load
a IPL data.
[How to solved the FErr26]
When the error FErr26 is showed on the display at the machine, please resolder the Flash ROM 1
pins as showing in the figure.
Re-solder the all lines.
Flash ROM Re-soldering

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Trouble shooting ECR V1.01
2-2. Repair the Main P.C.Board 1
To repair the No display machine, perform the following repair procedure.
Note 1 : Each repair procedure refers to the each repair section.
Note 2 : Refer the service manual section 5 for open the upper case procedure.
NG
OK
NG
OK
NG
OK
START
Check around the
power supply.
Check osillation of
the pulse signal
correct.
Check the data bus
line.
END
2-2-1. Repair around the
power supply.
2-2-2. Repair procedure 1
2-2-3. Repair procedure 2

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Trouble shooting ECR V1.01
2-2-1. Repair around the power supply
1) Check AC input voltage by a multimeter tester.
2) Check the voltage from each output pins of connector CN1 from the power supply PCB.
CN1 Pin No.1 — VC1(DC32.3V) :For the Display power
CN1 Pin No.2 — VC2(DC24V) :For the Printer power
CN1 Pin No.3 — VLED(DC5.85V) :For the Logic circuit power
CN1 Pin No.4 — GND :Signal GND
CN1 Pin No.1
DC 32.3V CN1 Pin No.3
DC 5.85V
CN1 Pin No.4
GND 0V
CN1 Pin No.2
DC 24V
Note: Use the following GND point on the Main PCB for the oscilloscope.
Use the GND point for the
Oscilloscope.
Connector
CN1

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Trouble shooting ECR V1.01
[DC/DC convertor circuit for Dot Display Tube at Display PCB E445B-E2]
D2
Q2 VD1
Signal at D2 position
Signal at VD1 position
Signal at Q2 position
3) Check the DC/DC convertor in display PCB.
[DC/DC convertor circuit for 7 segment Display Tube at Display PCB E445B-E2]
Q3
VF1
Signal at Q3 position
Signal at VF1 position

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Trouble shooting ECR V1.01
2-2-2. Procedure Repair 1
1) Check that contact of CPU defective. ( For example, pin of CPU is floating. )
2) Check that the power supply is supplied to CPU.
( For example, the cables between the CPU and the power supply are snapping. )
3) Check “X1” of oscillator whether the signal of wave form is as follow.
( If not, resolder the connection point or replace “X1” of oscillator. )
4) Check “IC10” of CPU.
( If there are no signal at the X1, resolder the connection point or replace “IC10” of CPU. )
2-2-3. Procedure Repair 2
1) Visually check on the Main P.C.Board.
( For example, cold solder and surface flaw. )
2) Check the data bus line and the address line of CPU. If there are a problem signals at the
line, find out the reason and change the problem IC. (The each signal should be a digital signal
like a following pulse wave form. If you see the voltage level is not +5V or 0V, find out the
problem IC to follow the line. For example, change the IC7 of SN74LV374 address latch.)
C
PU clock X1
VDD +5V
GND 0V
Data bus line D
0
Data bus
CPU clock X1 wave form
CPU Data bus D0 line wave form
CPU clock X1

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Trouble shooting ECR V1.01
3) Check the poor connection between CPU and RAM or Flash ROM1.
Specially, check the Flash ROM1 connection to re-solder the all lines.
4) Check the RAM1 or Flash ROM1 chip enable signal.
5) If the signals of the address bus and the data bus are not stable (Ex: After some time,
the all signal becomes GND level or so on.), replace “IC10” of the CPU to new one.
[ Flash ROM1 chip enable signal ]
Flash ROM1 chip enable signal
Flash ROM1 chip enable
Flash ROM1 pin No.9
Flash ROM1 IC6
Flash RST
Flash ROM1 chip enable
Bottom side of Main PCB
Pin No.3 of IC25 (74LV00)
Flash1 CE
Address bus

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Trouble shooting ECR V1.01
RAM1 Data bus D0
RAM Chip enable signal
RAM1 chip enable
RAM1 chip enable
Pin No.22
RAM1 Address bus A0
RAM1 IC3
[ RAM1 chip enable signal ]
RAM1 chip enable
RAM1 chip enable
Pin No.4 IC30 (74LV02)

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Trouble shooting ECR V1.01
2-3. IPL loading ( Initial program loading opertion )
After preforming the MASK diagnostic operation, it is necessary to dawn load the IPL data.
To start the IPL loading, perform the following opertion.
[In case of using the P/C communication]
START
Turn off the power switch and set the Mode switch to PGM position.
While pressing the reset switch and <JOURNAL FEED> button, turn the power switch on.
Release the reset switch first and then release the <JOURNAL FEED> button.
Then, the machine shows following code on the display.
( If it is no display, please refer the section 2-2 of page 4 for repair.)
Display “EEEEEEEEEE” means the non application in Flash ROM.
If the display “EEEEEEEEEE”, please retry from START.
Display “0000000000” means waiting the IPL start command.
Input code “44449999” and press <SUB TOTAL> button.
Display “IPL 0000”. This is waiting a IPL data from a P/C or a Memory Cassette.
Connect RS232C cable (PRL-CB-2) between COM1 port of ECR and COM2 of P/C.
And, prepare the IPL file for ECR in the P/C. (IPL.exe file and IPL data XXXXXX)
Press <SUB TOTAL> button for ECR and then input “IPL XXXXXX” and Enter key at the P/C.
( XXXXXX = Program name <EX> AAIYAC )
Display is changing from “0 IPL XXX” to “0 IPL4 XXX”.
(XXX number will be counted down.)
If the number does not count down, please check the connection of RS232C cables.
When the ECR beeps 3 times and the display is changed to “0000000000”, the IPL loading is
finished.
END
ECR side P/C side
COM2
COM1
Cable PRL-CB-2

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Trouble shooting ECR V1.01
[In case of using the Memory Cassette RAC-9]
START
Turn off the power switch and set the Mode switch to PGM position.
While pressing the reset switch and <JOURNAL FEED> button, turn the power switch on.
Release the reset switch first and then release the <JOURNAL FEED> button.
Then, the machine shows following code on the display.
( If it is no display, please refer the section 2-2 of page 4 for repair.)
Display “EEEEEEEEEE” means the non application in Flash ROM.
If the display “EEEEEEEEEE”, please retry from START.
Display “0000000000” means waiting the IPL start command.
Input code “44449999” and press <SUB TOTAL> button.
Display “IPL 0000”. This is waiting a IPL data from a P/C or a Memory Cassette.
Set the Memory Cassette RAC-9 that has IPL data to the ECR.
Input code “20” and press <SUB TOTAL> button.
Display is changing from “2 IPL4 XXX” to “2 IPL XXX”.
(XXX number will be counted down.)
If the number does not count down, please check the connection of the Memory Cassette.
When the ECR beeps 3 times and the display is changed to “0000000000”, the IPL loading is
finished.
END
ECR side
Memory Cassette RAC-9
[Error code for IPL loading]
Display
On line error In line erro
r
Flash Pack IPL erro
r
01: LRC check erro
r
11: LRC check error 21: Write protect switch ON erro
r
02: Time out error (over time between 12: Time out error (over time between 22: IPL time limit = 0
Packet 180sec, Data 5sec) Packet 180sec, Data 5sec) 23: No IPL data
03: Receive data format erro
r
13: Receive data format erro
r
24: Format erro
r
Sequence counter error Sequence counter error 26: Load memory size over erro
r
08: Code flash erase/write erro
r
14: ARCNET open error 28: Flash erase/write error
18: Code flash erase/write erro
r
Error code
1IPL1E03

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Trouble shooting ECR V1.01
2-4. Normal diagnostic opertion
The following test can be checked in the diagnostic test.
1) Key code test
2) switch status test
3) Individual function test
Note : Details of Normal diagnostic opertion, refer to the “SERVICE MANUAL”.
NG
O
K
NG
O
K
NG
O
K
NG
O
K
NG
O
K
NG
O
K
START
To START Normal diagnostic
operation, refer to the
"SERVICE MANUAL".
Display test
END
A
A
A
A
A
A
2-5. Repair the
MainP.C.Board 2 A
Keyboard test
RAM2,3 or 4
test
Flash Rom2
test
Print test
RS232C test

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Trouble shooting ECR V1.01
2-5. Repair the Main P.C.Board 2
< Probable Causes >
1.Display tube is broken.
NG 2.Communication lines or data between
the display and the Main P.C.Board have
a problem caused a poor connection o
r
OK a some IC broken.
1.Button or Key switch is broken.
NG 2.Spillage problem.
3.Circuit of the key common sheet
is damaged.
OK
NG 1.RAM2,3 or 4 is broken.
2.Poor connection of solder line.
3.Chip enable IC is broken.
OK
NG 1.Flash ROM2 is broken.
2.Poor connection of solder line.
3.Chip enable IC is broken.
OK
1.Print head is broken.
( Printer ) 2.Poor connection of the cable.
3.Motor is broken.
4.Paper Jam
NG
1.Drive IC5 or transistor
OK Q6 or Q8 is broken.
( Main P.C.Board ) 2.CPU IC10 has poor connection
of solder lines.
1.COM1 IC18 is broken.
NG 2.CPU IC10 has poor connection
of solder lines.
3.Cable wiring is wrong.
OK
START
Display
Key Board
RAM2,3 or 4
Flash ROM2
END
RS232C
Printer

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Trouble shooting ECR V1.01
1) Warm IC by hotblow.
2) Warm all pins of IC generally.
3) Sometimes check condition
of IC with tweezers.
4) If solder gradually will melt, tweezers
is inserted little by little between IC
and P.C.B.
6) Remove IC slowly, while confirming
whether solder is melting.
5) IC clamps the location where there
is not pin with tweezers.
7) Complete.
Note : Please handle with care to re-
move ICs. Because, there are possibil-
ity that P.C.B breaks and also some pins
of IC bends, when remove IC forcibly.
3. The example of repair
3-1. How to Remove IC

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Trouble shooting ECR V1.01
1) Old solder is remaining, to the location
that removed IC yet.
First this old solder is removed.
2) Solder new solder at the pattern of IC.
3-2. Preparation of solder for IC
3) New solder and old solder can be removed
by sliding the new solder that melted with
soldering iron.
Remaining even 3 places work similarly.
4) Able to solder IC easily by above work “3)”.
5) New IC is put on P.C.B.
At this time, that the pin of IC does not
deviate from the pattern.
7) Temporary soldering of IC is corner
4 places of IC.
Refer to the above photograph.
6) Temporary soldering of IC.
Note : Do temporary soldering accurately.
In case that the location of IC deviated work
of becomes to do over again.

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Trouble shooting ECR V1.01
3-3. Solder IC
1) Much solder is soldered to all pins of IC.
4) Solder is removed, by raising the top of
the solder iron in a slanting direction.
6) In the case that a little of solder remains,
remove it by using the desoldering
equipment.
2) Solder iron is slid in the left end from the
right edge of IC like above photograph.
At this time, top of the solder iron is the
condition which only the solder is touching
and part from the pin. ( See “[ Fig ]” )
3) Most of the solder can cause to migrate it
to the left end of IC by the above work “2)”.
5) “2)” to “4)” of work are repeated.
After that become above photograph.
7) If removed solder too much with above
work “6)”, solder a little of solder again.
8) Above works to other 3 places.
Note : If stickiness appears and also
solder changes color, please add new
solder. It is easy to remove solder.
Solder
Gap
I C
IC-Pin
Solder iron
[ Fig ]

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Trouble shooting ECR V1.01
3-4. Clean around IC
1) Rosin is remaining, to the location that
soldered IC.
2) Ethyl alcohol is used, to remove rosin.
3) Rosin is removed carefully by using
alcohol and cotton applicator.
4) After that around IC becomes clean like
above photograph.
Note1 : Be sure that the IC have no bent pins.
Abent pin will make contact for a while, but
after vibration it no longer does.
Note2 : Cleanup does not use tissue paper.

CASIO TECHNO CO.,LTD.
Overseas Service Division
Nishi-Shinjuku Kimuraya Bldg. 1F
5-25, Nishi-Shinjuku 7-Chome
Shinjuku-ku, Tokyo 160-0023, Japan
Trouble shooting V1.01 : Correction of page lines for Miss print