176
UF-5500 / 4500
11.2.14. LSU Section
CROSS REFERENCE:
LSU (Laser Scanning Unit) Section
LSU
Does the POLYGON
MOTOR rotate?
Repair.
YES
NO
YES
NO
Replace LSU.
YES
Is the POLYGON
signal from Q503
Base, Q505 Base
output?
Is the signal from
pins 4, 5, 6 of CN500
output?(Refer to
LSU wave form)
Replace IC300.
NO
NO
Check the solder at R511, R501,
R502.
Is the signal from
R511(IC300 Side)
R501(IC300 Side)
R502(IC300 Side)
output?(Refer to LSU
wave form)
YES
Replace LSU.
Is the voltage at R504
(IC300 Side) about 0V?
Check the solder
at R504.
YES
NO
OK
Is the voltage at pin 5
of CN501 about 24V?
Is the voltage at pin 1
of CN500 about 5V?
Check C501, C503, C505.
Check C504,
IC501, D504, C512.
NO
NO
YES
YES
IC300 NG.
Is the solder at
Q503, Q505 OK?
YES
NO
Replace Q503/Q505.
OK?
NO
Содержание UF-4500
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Страница 248: ...248 UF 5500 4500 13 5 Test Chart 13 5 1 ITU T No 1 Test Chart ...
Страница 249: ...249 UF 5500 4500 13 5 2 ITU T No 2 Test Chart ...
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Страница 287: ...287 UF 5500 4500 130 131 132 133 134 135 136 137 138 139 140 141 PCB2 A UF 5500 only CN1 ...
Страница 289: ...289 UF 5500 4500 PCB8 PCB4 160 161 163 162 164 167 168 171 177 178 172 173 174 173 176 169 170 162 164 A A 165 ...
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Страница 305: ...305 UF 5500 4500 ...
Страница 309: ...309 UF 5500 4500 A1 A3 A4 A6 A7 A8 A9 A10 P1 P2 P3 P4 P5 P6 P7 P8 P7 Drum Cartridge Toner Cartridge P9 A11 ...
Страница 311: ...311 UF 5500 4500 501 502 503 504 506 507 505 508 509 511 510 514 513 512 P51 P53 P54 A51 P52 ...
Страница 362: ...362 UF 5500 4500 ...
Страница 365: ...365 UF 5500 4500 Published in Japan ...