Canon BJC-8500 Service Manual

Also see for BJC-8500: User manual

Contents

6. Pin AssignmentsNote:*1. All -RET signals are connected to signal ground (0V).*2. N.C. means non-connection.*3. For No. 18 and 35 (Peripheral Logic High), the level is connected to +5.0V at 390Ω.*4. For No. 14/No. 36, the level is connected to +5.0V at 3.3kW.*5 Refer to"Part 5: 8.2 Circuit Diagrams LOGIC BOARD 12" (page 5-64).7. Signals (Compatibility Mode)Input signals:1) DATA STROBEThis signal is a strobe signal for reading DATA1 to DATA8.This signal is high in normal condition, and the signal goes low when the printerreceives data.The BUSY signal is kept high until this signal changes from low to high.2) DATA1 to 8The printer receives data by the DATA STROBE signal.Each bit of DATA1 to DATA8 must not change until 0.5 μs or more passes after theDATA STROBE signal's rising edge.3) INITWhen the specified period of time has passed after the signal changes from high tolow and the signal becomes high again, the printer considers the signal as a inputprime and performs the following:a) Initialization is performed when the parallel port is selected.b) Ignores the input prime when the serial port is selected.4) AUTO FEED XTIn the BJC-8500, this signal is used only as a transmission signal from theCompatible mode to negotiation mode.Part 2: Product Specifications BJC-85002-14No.123456789101112131415161718SignalDATA STROBEDATA1DATA2DATA3DATA4DATA5DATA6DATA7DATA8ACKNLGBUSYP.E.SELECTAUTO FEED XT *4N.C. *2GNDGNDPeripheral Logic High *3Circuit Diagram *5STROBEDATA1DATA2DATA3DATA4DATA5DATA6DATA7DATA8ACKBUSYPErrorSelectAuto Feed XTN.C.GNDGNDPeripheral Logic HighIN/OUTININ/OUTIN/OUTIN/OUTIN/OUTIN/OUTIN/OUTIN/OUTIN/OUTOUTOUTOUTOUTINNo.192021222324252627282930313233343536IN/OUTINOUTINCircuit Diagram *5GNDGNDGNDGNDGNDGNDGNDGNDGNDGNDGNDGNDINITFAULTGNDN.C.—SLCT INSignalDATA STROBE -RET * 1DATA1 -RET * 1DATA2 -RET * 1DATA3 -RET * 1DATA4 -RET * 1DATA5 -RET * 1DATA6 -RET * 1DATA7 -RET * 1DATA8 -RET * 1ACKNLG -RET *1BUSY -RET *1P.E. -RET * 1INITFAULTGNDN.C.*2Peripheral Logic High *3SELECT INX *4