Samsung OFFICESERV 7100 Service Manual page 132

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3.4.7.2 When the Power Is Not Supplied
The method to solve the problem when the power is not supplied to the 8COMBO port is
as follows:
Check the voltage of both ends
of TIP-RING.(-30 V or more)
Check if -34 V or more is
supplied to PIN7 of RELAY.
Is the voltage -34 V or more?
Yes
PIN of LD0-15 is HIGH?
Yes
Replace PZTA42.
End
3-38
No
Check or repair -48 V from the 30PIN
connector.
No
Check or repair the POWER control
port of SBS9401.
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