Power-On Is Not Possible - Toshiba e-STUDIO170F Service Manual

11.4.1

Power-ON is not possible

Step
1 Is the power cord plugged in an appropriate out-
let (of the correct voltage)?
2 Are the connections secure between the LVPS
(CN1) and the main PBA (CN17)?
3 Does the connector pin come off or is the cable
broken?
4 Are the rated voltages being output from the
LVPS?
5 If no problem is found in the steps above, the
main PBA may be defective.
11.4.2 Nothing is indicated on the LCD display
Step
1 Is the cable firmly connected between the opera-
tion panel (CN1) and the main PBA (CN4)?
2 Does the connector pin come off or is the cable
broken?
3 If no problem is found in the steps above, the
operation panel or main PBA may be defective.
11.4.3 Error message is re-displayed
[ 1 ] BROKEN REGISTRATION
Step
1 Has this machine been used in an environment
satisfying the specifications? Or has its power
switch been turned OFF for a long period of time.
2 Did anyone remove or attach an electronic com-
ponent with the power ON?
3 If no problem is found in the steps above, the
main PBA may be defective.
e-STUDIO170F Troubleshooting
Check points
Check points
Check points
Plug the power cord in an appropriate outlet.
Connect each PC board firmly.
Replace the cable.
Measure the voltages between the following pins of
the LVPS (CN1) When the rated voltage is not
measured, replace the LVPS.
Measuring points
Pin 2 - Pin 4
Pin 3 - Pin 4
Pin 6 - Pin 5
Pin 7 - Pin 5
Pin 14 - Pin 15
Replace the main PBA.
Insert the cable or connector to the connectors
firmly.
Replace the cable.
Replace the operation panel and then the main
PBA.
Charge the battery by leaving the unit plugged in
for 24 hours then check it again.
Replace the lithium battery on the main PBA
(BAT101) if it is more than 5 years old.
RAM data has been lost/corrupted. A full memory
clear is required, then the contents must be reset
using memory write, and all drum history data
erased.
Replace the main PBA.
11 - 50
Solutions
Rated voltage
DC +12V +10% / -10%
DC -12V +10% / -10%
DC +5.2V +0.25V / -0.25V
DC +5V +5% / -5%
DC +24V +5% / -5%
Solutions
Solutions
January 2005 © TOSHIBA TEC