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Toshiba Work Light e-Studio160 Manuales De Servicio

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e-STUDIO160/200/250  TROUBLESHOOTING
4 - 48
December 2002 TOSHIBA TEC
4.1.15  Other abnormal service call
C91
SRAM abnormality
1. Turn the main switch OFF.  Perform the RAM clear ([1] [3] [*] + ON).
2. If C91 appears again after the RAM clear, go to step 3.
3. Confirm that the J1 short pin on the main PWA is inserted properly into the pin 1 side.
4. When the power is off, check that the voltage of the lithium battery (SY1) is 2.4V or more.
5. When the power is off, check that the SRAM backup voltage is 2.0V or more.
(Between IC58 or pin 14 (GND) of IC74 and pin 28 (+5VB))
6. Replace the lithium battery (SY1).
7. Replace the main PWA.
C95
Power supply unit fan motor abnormality
1. Check if each connector between the power supply unit fan motor and the relay PWA (CN50)
is disconnected.
2. Check if each connector between the relay PWA (CN21) and the main PWA (CN15) is dis-
connected.
3. Check if each connector pin is removed or the harness is broken.
4. Check if any conductor pattern on the relay and main PWA is open- or short-circuited.
5. Replace the power supply unit fan motor.
6. Replace the relay PWA.
7. Replace the main PWA.
C96
Process unit fan motor abnormality
1. Check if each connector between the process unit fan motor and the relay PWA (CN50) is
disconnected.
2. Check if each connector between the relay PWA (CN21) and the main PWA (CN15) is dis-
connected.
3. Check if each connector pin is removed or the harness is broken.
4. Check if any conductor pattern on the relay and main PWA is open- or short-circuited.
5. Replace the process unit fan motor.
6. Replace the relay PWA.
7. Replace the main PWA.