Xerox Phaser 7100

Error Troubleshooting
Phaser 7100 Service Manual Xerox Internal Use Only2-180
IOT-ESS Communication Fail/ Communication Fail 6
IOT communication error has occurred due to one of the following problems.
• An abnormal parameter was set in the argument of the sending function, which causes an error.
• Communication failure has occurred because no ACK was received despite having re-sent twice.
(The Sequence No. of the sent Message Packet is incorrect.)
• Communication failure has occurred because no ACK was received despite having re-sent twice.
(The Packet No. of the sent Message Packet is incorrect.)
• Communication failure has occurred because no ACK was received despite having re-sent twice.
(The Message Length of the sent Message Packet is incorrect.)
• Communication failure has occurred because no ACK was received despite having re-sent twice.
(The Check Code of the sent Message Packet is incorrect.)
• Communication failure has occurred because no ACK was received despite having re-sent twice. (A
parity error was detected in the hardware at the IOT side.)
Applicable Fault Codes
• 024-340: (IOT) - MCU Send Error Detected by Controller (Invalid parameter was used)
• 024-341: (IOT) - MCU Send Error Detected by Controller (Sequence No. error)
• 024-342: (IOT) - MCU Send Error Detected by Controller (Packet No. error)
• 024-343: (IOT) - MCU Send Error Detected by Controller (Message length error)
• 024-345: (IOT) - MCU Send Error Detected by Controller (Check code error)
• 024-346: MCU Send Parity Error Detected by Controller
Initial Actions
• Power cycle the printer.
• If the problem persists, perform the following procedure
.
Troubleshooting Reference
Applicable Parts Wiring and Plug/Jack Map References
• Image Processor PWB, PL 12.4.1
Troubleshooting Procedure
Step Actions and Questions
1. Go to IOT System Fail on page 2-407.
2. If the problem persists, replace the I/P PWB (REP 12.17 Image Processor (I/P) PWB on page 4-228).