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8 114A
HP
Service Guide
Timing Board
This board consists mainly of data-controlled devices and
troubleshooting is reduced to replacing suspect devices. However,
checks
basic
can be performed on some parts of the circuitry:
Supply Voltages
Check whether the power supply voltages are present on the board.
Measure against AGND at the positive pole of capacitor C109.
F L G N D
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I
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I WING
B O A R D
Figure 5-6. Supply Voltages Testpoints on the Timing Board
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Troubleshooting
