Chapter 66-16.1 Troubleshooting6.1.1 Outline6.1.1.1 Outline of Troubleshooting 0012-65981. OutlineTroubles subject to troubleshooting are classified into those shown on the display (warning, error, and service call) and those not shown on the display.2. Precautions for Troubleshooting1) Check the environmental conditions and the media used for printing.2) Before performing troubleshooting, make sure that all connectors and cables are connected properly.3) When servicing the printer with the external cover removed and the AC power supplied, be extremely careful to avoid electric shock and shorting electricaldevices.4) In the following sections, the troubleshooting steps are described such that the component related to the most probable cause of the problem will be repairedor replaced first, being followed by components with less problem probability. If multiple components have the same problem probability, the steps are describedbegging with the easiest one.After performing each step, check to see if the problem has been resolved by making test prints. If the problem persists, proceed to the next step.5) After completion of the troubleshooting, check that all connectors and cables have been reconnected and screws have been tightened firmly.6) Whenever you have performed replacement or repair services, make test prints to check whether the problem has been resolved.6.2 Location of Connectors and Pin Arrangement6.2.1 Main controller PCB 0017-5652F-6-1T-6-1T-6-2J1001PinNumberSignal name IN/OUT Function1 VBUS IN USB VBUS (+5V)2 D- IN/OUT USB data (-)3 D+ IN/OUT USB data (+)4 GND - USB GND5 GND - GND (Connector shell)6 GND - GND (Connector shell)J1001PinNumberSignal name IN/OUT Function1 GND - GND2 GND - GND3 GND - GND4 +3.3V OUT Power supply (+3.3V)5 +3.3V OUT Power supply (+3.3V)6 +3.3V OUT Power supply (+3.3V)J3411 J3101J1101J3701J1201J1001J2703J3203J3211J2801J3911J2511J3011J2512 11111111J2601J3411 J3101J3402J1101J3701J3801J1801J1801J1201J1001J2703J3202J3211J2801J3911J2511J3011J2512 1111111 1 1111 1111111J2712J27121