SRP-270
7-8 IEEE 1284 Problem
•Check the Control Line (CS3, WR, RD).
•Check the 1284 Control Line and Status Line.
•Check the Signal of ICs (U3, U6, U5)
•Check the related Circuit and Pattern on I/F PBA.
•Check the 1284 Control, Status Data Line.
7-9 USB Problem
•Check the Control Line & Signal. (CS3, RD, WR, INT)
•Check the Data Line & Signal.
•Check the Connector (34P)
•Check the Clock (48MHz)
•Check the related Circuit and Pattern on I/F PBA & Main PBA.
•Check the D+ whether it is Pull up to V3.3.
•Check the USB Cable whether it is open or short.
Rev. 3.02 | - 47 - |
