Epson FX 1170 Service Manual - Page 115

Repairing the Board Assembly, PSB/PSE

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5.3 Repairing the Board Assembly, C076 PSB/PSE REV.-A This section provides instructions for repairing the BOARD ASSEMBLY, C076 PSB/PSE. It describes various problems, likely causes, checkpoints, and solutions. The checkpoint column provides proper waveforms, resistance values, and other information for each component of the C076 PSB/PSE. The OPERATE button on the control panel turns on or off only the secondary power circuit, so the primary power circuit IS Ilve as long as the printer IS connected to an AC power outlet. rDow not touchA the heatR sink atta: chedN to the FEG T (Ql) when the printer is powered. Table 5-4. Repairing the BOARD ASSEMBLY, C076 PSB/PSE 5-11

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5.3
Repairing the Board Assembly,
C076
PSB/PSE
This section provides instructions for repairing the BOARD ASSEMBLY,
REV.-A
C076
PSB/PSE.
It describes various
problems, likely causes, checkpoints, and solutions.
The checkpoint column provides proper waveforms,
resistance values, and other information for each component of the
C076
PSB/PSE.
rwAR:NG
The OPERATE button on the control panel turns on or off only the secondary power circuit, so the
primary
power
circuit
IS
Ilve
as
long as the printer
IS
connected to an AC power outlet.
Do not touch the heat sink attached to the FET
(Ql)
when the printer is powered.
Table 5-4. Repairing the BOARD ASSEMBLY,
C076
PSB/PSE
5-11