Toshiba e-Studio 220P

Service checks 03

Dead machine service check

Note: Check the AC line voltage. The voltage should be within the following limits:

• 90 V ac–120 V ac for nominal–100 V model printer
• 100 V ac–127 V ac for the nominal–110 V model printer
• 200 V ac–240 V ac for the nominal–220 V model printer

Low voltage power supply (LVPS) service check

FRU	Action
Low voltage power supply (LVPS) (100 V, 110 V, or 220 V)	Unplug the power cord and verify that the cable is correct and functioning. Replace if necessary. With the power cord unplugged, remove the HVPS fan and disconnect the 8–pin (CN2) connector from the LVPS. Pin 8 is the topmost pin of the connector. • Verify pins #2, #5, and #6 are ground. Replug the power cord and turn the printer on. CAUTION: Be careful to not ground pins to cage while testing. • Verify pin #4 is +5 V dc. • Verify pins #7 and #8 are +24 V dc. If any one of these is incorrect, replace the LVPS. If these are correct, check the controller card, operator panel, and wiring Note: A “dead machine” implies no power beyond the LVPS. If the printer behaves “dead” but has correct power from the LVPS, unplug all connectors from the controller card except J18 (power from LVPS). Turn the printer on. If the printer does not beep 5 times, replace the controller card. If it does beep, turn the power off and plug in other devices such as sensors and operator panel one at a time. Turn the printer back on and observe any beeps and/or operator panel messages. This technique may be repeated to help isolate a faulty component or short.

FRU

Action

Low voltage power supply (LVPS) (100 V, 110 V, or 220 V)

Unplug the power cord and verify that the cable is correct and functioning. Replace if necessary.
With the power cord unplugged, remove the HVPS fan and disconnect the 8–pin (CN2) connector from the LVPS. Pin 8 is the topmost pin of the connector.
• Verify pins #2, #5, and #6 are ground. Replug the power cord and turn the printer on.
CAUTION:
Be careful to not ground pins to cage while testing.
• Verify pin #4 is +5 V dc.
• Verify pins #7 and #8 are +24 V dc.
If any one of these is incorrect, replace the LVPS.
If these are correct, check the controller card, operator panel, and wiring
Note:
A “dead machine” implies no power beyond the LVPS. If the printer behaves “dead” but has correct power from the LVPS, unplug all connectors from the controller card except J18 (power from LVPS). Turn the printer on. If the printer does not beep 5 times, replace the controller card. If it does beep, turn the power off and plug in other devices such as sensors and operator panel one at a time. Turn the printer back on and observe any beeps and/or operator panel messages. This technique may be repeated to help isolate a faulty component or short.

High voltage power supply (HVPS) service check

FRU	Action
HVPS Cartridge	Check continuity between the HVPS and the charge roll, Dr. B (doctor blade), TAR (toner adder roll), the developer roll, and the photoconductor (DC). Check as follows: Turn printer off. Remove the right side cover. See “Right side cover removal” for more information. Remove the print cartridge. Check from C on the HVPS to the bearing on the left side of the charge roll. See page 5-8 for more information. Check from the Dr. B, TAR, developer roll (D), transfer roll (T), and photoconductor (DC) respectively to the corresponding pin on the right side frame where the print cartridge makes its contacts. If any show discontinuity, remove the HVPS and check the cartridge contact assemblies (springs) for continuity and damage. If the charge roll and the cable at C show discontinuity, replace the left guide assembly. See “High voltage power supply (HVPS)” for testing the board.

FRU

Action

HVPS
Cartridge

Check continuity between the HVPS and the charge roll, Dr. B (doctor blade), TAR (toner adder roll), the developer roll, and the photoconductor (DC). Check as follows:

Turn printer off.
Remove the right side cover. See “Right side cover removal” for more information.
Remove the print cartridge.
Check from C on the HVPS to the bearing on the left side of the charge roll. See page 5-8 for more information.
Check from the Dr. B, TAR, developer roll (D), transfer roll (T), and photoconductor (DC) respectively to the corresponding pin on the right side frame where the print cartridge makes its contacts.

If any show discontinuity, remove the HVPS and check the cartridge contact assemblies (springs) for continuity and damage. If the charge roll and the cable at C show discontinuity, replace the left guide assembly. See “High voltage power supply (HVPS)” for testing the board.

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