Tektronix Phaser 840, Service Manual

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Service Guide
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Contents
General Information 1
Phaser 840 printer overview 2
Phaser 850 printer overview 4
Solid inks 5
About RAM upgrades 5
Memory considerations 6
Print engine assemblies 8
Combination sensors and their meanings 16
Media tray type sensing 16
The main board 17
Front panel 19
Rear panel 20
Phaser 840 and Phaser 850 printer differences 23
Specifications 24
Regulatory specifications 28
Error Codes and Messages 29
Rear panel LED error codes 29
Error messages 32
Troubleshooting 55
Front panel shortcuts 55
Access fault history 55
Set front panel language 55
Access service menu 55
Fast time to ready 55
Network Event Logs (Phaser 850) 56
System power-up sequence 57
No lights, no sound on power-up 59
Verifying main board CPU operation 59
Verifying print engine operation by printing its startup page 59
Verifying power supply operation 60
Measuring power supply voltages 60
Inspecting the power supply fuses 61
Testing for shorted drivers 62
Testing for a shorted motor 63
Testing motor and solenoid resistances 63
Testing the cap/wipe/purge vacuum system 63
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