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The following address check is performed further.
Check point address = 1C0000H, 1C0001H

1C0002H, 1C0004H
1C0008H, 1C0010H
1C0020H, 1C0040H
1C0080H, 1C0100H
1C0200H, 1C0400H
1C0800H, 1C1000H
1C2000H, 1C4000H
1C8000H, 1D0000H

Initialize the table pointer

Read check address from the
address table by pointer
sccess

Save data of check address
to the CPU register

Write data 55H to check
address

For check address other than
the current check address,
write AAH after saving 1-byte
data into the register

Is the

current check

address 55H?

Reset operation of saved data

Is the

operation comleted

for the other check

address?

Revise the table pointer

Is the

address table

completed?

End

YES

YES

YES

NO

Address
error

NO

NO

Check address
table

START

Table pointer

END

Operation flow

 40 

3

Check the following items:
Check the termination printout.

4

Test termination
The test terminates after printing the termination printout.

Termination printout:

 Normal termination

120 

  Abnormal termination

  Ex – – – – –

120 

≅≅≅≅≅

 

X = 1: Data check error

2: Address check error

Note: When an error occurs, the error print is performed and the

check is terminated. The error occurrence address is shown in
hexadecimal at positions shown with 

≅≅≅≅≅

.

1

Key operation

130 

→

 TL 

2

Functional description
Sum check of the standard ROM (C00000H - C7FFFFH) is per-
formed. If the lower two digits of SUM is 10H, it is normal. 

3

Check the following items:
Check the printout after the test.

4

Test termination
The test automatically terminates with termination message.

Normal termination print

 

130 

 ROM1

27040

≅≅≅≅≅

 

Error termination print

  E – – – –  

130 

 ROM1 

27040

≅≅≅≅≅

 

Note:  "

≅≅≅≅≅

" means the ROM version number. 

The underlined section (10 bytes) of code table is provided in
the ROM as a standard and the table content is always
printed. 
The table position is the upper 10 digits of the ROM address.
The check sum correction address is the last address -0FH.

The dot pulse width adjust circuit is provided to control the width of
the current applied to the dot head of the printer KI-OB6753RCZZ,
according to a supply voltage fluctuation. 
When the circuit is changed with a new one for such as a repair work,
the dot pulse width needs to be adjusted using the 200K pot VR1.

Fig. 3-3

1. Turn power on.

2. Measure the voltage of the VP line between the fuse F1 and GND.

Use a digital voltmeter capable of measuring 100mV steps.

3. Set the MODE switch to the SRV position and start the diagnostic

program Job #150 with the next command procedure.

150 

→

 TL 

4. Adjust pulse width of TPW at the test point TP1 as shown in the

graph in Fig.3. The pulse width of TPW can be adjusted using the
200K pot VR1.

5. To terminate the diagnostic program, just press any key.

FIg. 3-4

Fig. 3-5

∗

For the adjustment of VP, refer to CHAPTER 7. SERVICE PRE-
CAUTION. (Printer printing speed adjustment)

+24V

VP

TRG

2

IC183

TD62503

R152

130KF

D6

133

D23

E562

R97

R98

62K

2K

3

2

C124

0.01µ

ZD1

RD4.3

4

+

-

1

8

R99

3.3K

TP1

PE

IC21A

GL393

+5V

+5V

VR1

200K

VP

15

DOT DISPLAY :

S -

M

R O

VR1

TP1

GND

Pd

Pw

Pt

TRG

TP1(PE)

Pw
Pt

4µsec
1000µsec

Pd is adjusted to 518 usec when Vp is +24.0V.

 41 

1

Key operation

20X 

→

 TL 

JOB

#NO.

RAM NO.

Memory to be checked

Address

area to be

checked

200 Option RAM

(main)

ER-01RA

1E0000H

(

1E7FFFH

201 Option RAM

(main)

ER-02RA

1E0000H

(

1FFFFFH

202 ER-01MB

RAM1

ER-02RA+ER-01MB

1E0000H

(

21FFFFH

203 ER-01MB

RAM2

ER-02RA+
(ER-01MB+ER-02RA)

1E0000H

(

23FFFFH

204 ER-01MB

RAM3

ER-02RA+
(ER-01MB+ER-02RA

✕

2)

1E0000H

(

25FFFFH

205 ER-01MB

RAM4

ER-02RA+
(ER-01MB+ER-02RA

✕

3)

1E0000H

(

27FFFFH

206 ER-02MB

ER-02RA+ER-02MB

1E0000H

(

2FFFFFH

2

Content
The following check are performed for the optional RAM. Do not
change the memory contents before and after this check JOB.
The following process is performed for memory address to be
checked. 

PASS1: memory data save
PASS2: Data "0000H" write
PASS3: Data "0000H" read and comparison, data "5555H" write
PASS4: Data "5555H" read and comparison, data "AAAAH" write
PASS5: Data "AAAAH" read and comparison
PASS6: Memory data restore

If a compare error is found in the check sequence from PASS1 to
PASS6, error print (error code E1) is performed. If there is no error
found to the end of the last address, the operation is completed
normally. 

Then the following address check is performed by judging the
option chip to be integrated. The check point addresses are as
follows:

Check

Address

ϑΟΒ200 ϑΟΒ201 ϑΟΒ202 ϑΟΒ203 ϑΟΒ204 ϑΟΒ205 ϑΟΒ206

1E0000H

♠

♠

♠

♠

♠

♠

♠

1E0001H

♠

♠

♠

♠

♠

♠

♠

1E0002H

♠

♠

♠

♠

♠

♠

♠

1E0004H

♠

♠

♠

♠

♠

♠

♠

1E0008H

♠

♠

♠

♠

♠

♠

♠

1E0010H

♠

♠

♠

♠

♠

♠

♠

1E0020H

♠

♠

♠

♠

♠

♠

♠

1E0040H

♠

♠

♠

♠

♠

♠

♠

1E0080H

♠

♠

♠

♠

♠

♠

♠

1E0100H

♠

♠

♠

♠

♠

♠

♠

1E0200H

♠

♠

♠

♠

♠

♠

♠

1E0400H

♠

♠

♠

♠

♠

♠

♠

1E0800H

♠

♠

♠

♠

♠

♠

♠

1E1000H

♠

♠

♠

♠

♠

♠

♠

1E2000H

♠

♠

♠

♠

♠

♠

♠

1E4000H

♠

♠

♠

♠

♠

♠

♠

1E8000H

—

♠

♠

♠

♠

♠

♠

1F0000H

—

♠

♠

♠

♠

♠

♠

200000H

—

—

♠

♠

♠

♠

♠

210000H

—

—

♠

♠

♠

♠

♠

220000H

—

—

—

♠

♠

♠

♠

240000H

—

—

—

—

♠

♠

♠

260000H

—

—

—

—

—

♠

♠

280000H

—

—

—

—

—

—

♠

"

♠

" in the table shows that the check point address in the horizon-

tal column is valid, and "—" shows it is invalid. 
When any error occurs in this address check, error code E2 is
printed. 

3

Check the following items.
Check the termination print. 

4

Test termination
The test terminates after printing the termination printout. 

Termination print

Normal termination

 

20X 

Abnormal termination

  EY– – – –

20X 

   

≅≅≅≅≅≅

 

20X: JOB # (200~206)
Y:

Error code

Note: When an error occurs error print is performed and the error

address is displayed in position 

≅≅≅≅≅≅

 in hexadecimal. 

 42 

1

Key operation

30X 

→

 TL  (X: 0~6)

JOB

#NO.

RAM NO.

Memory to be checked

Address

area to be

checked

300 Option RAM

(main)

ER-01RA

1E0000H

(

1E7FFFH

301 Option RAM

(main)

ER-02RA

1E0000H

(

1FFFFFH

302 ER-01MB

RAM1

ER-02RA+ER-01MB

1E0000H

(

21FFFFH

303 ER-01MB

RAM2

ER-02RA+
(ER-01MB+ER-02RA)

1E0000H

(

23FFFFH

304 ER-01MB

RAM3

ER-02RA+
(ER-01MB+ER-02RA

✕

2)

1E0000H

(

25FFFFH

305 ER-01MB

RAM4

ER-02RA+
(ER-01MB+ER-02RA

✕

3)

1E0000H

(

27FFFFH

306 ER-02MB

ER-02RA+ER-02MB

1E0000H

(

2FFFFFH

2

 Functional description
The following check are performed for the optional RAM. Do not
change. 

Check

Address

ϑΟΒ300 ϑΟΒ301 ϑΟΒ302 ϑΟΒ303 ϑΟΒ304 ϑΟΒ305 ϑΟΒ306

1E0000H

♠

♠

♠

♠

♠

♠

♠

1E0001H

♠

♠

♠

♠

♠

♠

♠

1E0002H

♠

♠

♠

♠

♠

♠

♠

1E0004H

♠

♠

♠

♠

♠

♠

♠

1E0008H

♠

♠

♠

♠

♠

♠

♠

1E0010H

♠

♠

♠

♠

♠

♠

♠

1E0020H

♠

♠

♠

♠

♠

♠

♠

1E0040H

♠

♠

♠

♠

♠

♠

♠

1E0080H

♠

♠

♠

♠

♠

♠

♠

1E0100H

♠

♠

♠

♠

♠

♠

♠

1E0200H

♠

♠

♠

♠

♠

♠

♠

1E0400H

♠

♠

♠

♠

♠

♠

♠

1E0800H

♠

♠

♠

♠

♠

♠

♠

1E1000H

♠

♠

♠

♠

♠

♠

♠

1E2000H

♠

♠

♠

♠

♠

♠

♠

1E4000H

♠

♠

♠

♠

♠

♠

♠

1E8000H

—

♠

♠

♠

♠

♠

♠

1F0000H

—

♠

♠

♠

♠

♠

♠

200000H

—

—

♠

♠

♠

♠

♠

210000H

—

—

♠

♠

♠

♠

♠

220000H

—

—

—

♠

♠

♠

♠

240000H

—

—

—

—

♠

♠

♠

260000H

—

—

—

—

—

♠

♠

280000H

—

—

—

—

—

—

♠

"

♠

" in the table shows that the check point address is valid, and

"—" shows that it is invalid. 

3

Check the following items. 
Check the termination print. 

4

Test termination
The test terminates after printing the termination printout. 

Termination printout

Normal termination

 

30X 

Abnormal termination

  EY– – – –

30X 

   

≅≅≅≅≅≅

 

30X: JOB# (300~306)
Y:

Error code

Note: When an error occurs error print is performed and the error

address is displayed in position 

≅≅≅≅≅≅

 in hexadecimal.

1

Key operation:
400 

→

 TL 

2

Functional description:
A sum check is done for the option ROM (Address hex C80000H
thru CBFFFFH.)

3

Check the following items:
Check the termination printout.

4

Test termination:
The test terminates after printing the termination printout.

Termination printout

 Normal termination

400 

 ROM

27020

≅≅≅≅≅

 

  E – – – – –

400 

 ROM

27020

≅≅≅≅≅

 

The underlined section must be the same as the standard ROM
test specification. (Refer to JOB #130.)

DOT DISPLAY :

- R

M

O

 43 