7-13
7.17 Copy All Black
Copy again and check if
OK
No
Yes
Check the soldering
state of U17, U3 are
normal
Yes
No
Check if J3-10=24V
when "ISON" is hign
Solder anew
Yes
Check printer board
No
Check if Q1-B pin = 0.7V
No
Yes
Check U1-86
Check if Q1-C, E pin
conductive (0V)
Yes
No
Check Q1
Insert a white paper
to do calibration
END
Check if R36, 37 normal
Yes
No
Solder anew R36, 37
Check if Q2-C pin
conductive (24V)
Yes
No
Check Q2
Check power 24VC
J2-4, 5
Summary of Contents for TF-300P
Page 1: ...I TF 300P Field Service Manual Ver 02 July 8 1999 TTIC...
Page 12: ...1 7 1 3 General Appearance 1 3 1 Appearance 1 3 2 Show the operation panel...
Page 84: ...7 23 Check the status of C24 C25 C26 R32 R34 L11 and L12 Check the Microphone inside handset...
Page 100: ...9 1 9 MECHENICAL DRAWING AND PARTS LIST...
Page 101: ...9 2...
Page 102: ...9 3...
Page 103: ...9 4...
Page 104: ...9 5...
Page 105: ...9 6...
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Page 115: ...9 16...
Page 116: ...10 1 10 CIRCUIT DRAWING...
Page 117: ...10 2...
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