199
UF-5500 / 4500
11.2.21.2. Troubleshooting Flow Chart
Is F1 open?
Check the Fuser Unit.
Is D1 short?
Replace F1.
Is F2 open?
Yes
No
Yes
Is C5 short?
Replace D1.
Yes
Yes
Is Q1(D-S, D-G
or S-G) short?
Replace C5.
Replace Q1.
Check the Main Board.
Yes
No
Power ON
24V output OK?
Yes
No
No
No
No
Power OFF
7V output OK?
Yes
END
Replace the whole board.
No
OK
7pin-5pin of
CN101 is short?
Is F101 open?
Yes
No
Replace F2.
Replace F101.
Yes
No
Replace D104.
Is D104 short?
Yes
No
Is D503 short?
Yes
No
Replace D503.
Summary of Contents for UF-4500
Page 180: ...180 UF 5500 4500 ...
Page 248: ...248 UF 5500 4500 13 5 Test Chart 13 5 1 ITU T No 1 Test Chart ...
Page 249: ...249 UF 5500 4500 13 5 2 ITU T No 2 Test Chart ...
Page 281: ...281 UF 5500 4500 10 10 11 15 12 17 18 19 20 21 22 23 24 28 29 30 27 25 26 21 13 14 16 30 ...
Page 287: ...287 UF 5500 4500 130 131 132 133 134 135 136 137 138 139 140 141 PCB2 A UF 5500 only CN1 ...
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Page 311: ...311 UF 5500 4500 501 502 503 504 506 507 505 508 509 511 510 514 513 512 P51 P53 P54 A51 P52 ...
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