173
UF-5500 / 4500
7. Check the top cover sensor .......... “TOP COVER OPEN”
8. Check the toner sensor .......... “TONER LOW”, “CHANGE DRUM”
CROSS REFERENCE:
NG
OK
NG
IC300 NG
Replace SW1 (H.V.P.S)
Check the connection of signal
line and check the soldering at
R516, R517, Q507 (Main Board).
Check the voltage at pin W25 of
IC300.
Check the voltage at pin W25 of
IC300 (Main Board).
The sensor lever pressed: 0V
(The top cover is closed.)
The sensor lever released: 3.3V
(The top cover is opened.)
NG
OK
NG
IC300 NG
Replace IC51 (Toner Board)
Check the connection of signal
line and check the soldering at
R523, R527, C516 (Main Board).
Check the waveform at pin AE22
of IC300 again.
Check the waveform at pin AE22 of
IC300 (Main Board).
The waveform should change
between 0V and 3.3V.
(Refer to SENSOR AND SWITCHES
SECTION)
Summary of Contents for UF-5500
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...
Page 297: ...297 UF 5500 4500...
Page 305: ...305 UF 5500 4500...
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...
Page 362: ...362 UF 5500 4500...