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5-3. Trouble shooting for circuitry
(1)
No LCD lights when AC Power is ON.
Have you checked the connection
?
1
YES
Is CN5 5-6 pin +5V normal ?
1
:s*
C heck the power supply section
Can the keys be operated ?
YES
NO
Check Ml board, CPU and the
peripheral circuit
v
Check the LCD panel
I
(2) The display shows [CHECK PAPER]
~Is the recording paper set properly ?
I
YES
Li---
Is the paper recewlng section securly
I Check the Ml P.W.B.
I
I check 'he 'eCording
I
-~
I paper sensor
(3) No motor rotates when the original
is inserted
(4) CIS lamp does not turn on during copying
(The motor is operating)
Is the S1 (lC14-80pin)
LOW ?
+
1
YES
Is the RMO 0-3
(CN6 l-6pin)
OK ?
J-
YES
.—
Check the motor
I
1
NO
1Is CIS in working order ?
I
I
I
YES
v
IS GLED (CN4-1O) LOW ?
NO
YES
v
!
1
1
~Check +24V (M5) ~
Check CIS ON
I
I
I
I
I
(5) No copy is made
Does the machine receive fax
transmission
properly ?
Check the reading section
I
Check the printing section
v
Is VIDEO (CN4-1) normal ?
NO
~NO
&&&
22
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Table of Contents
Troubleshooting
