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Section I: Imagesetter
Diagnostics
3-3
Because the Avantra is a multi-controller system, it provides two levels of tests:
•
Level One (core tests)
–executed by each micro-controller as it is taken out
of reset by the DIAG. The test purpose is to verify that each micro-controller
and its hardware domain are functional.
•
Level Two (micro-controller handshake tests)
–provides confidence in
the inter-micro-controller communication bus and its peripherals.
Each micro-controller must be initialized prior to performing its own core and sub-
system tests. At power-up the DIAG micro-controller is configured as the master de-
vice. It takes each micro-controller out of reset, initializes it, and performs basic
confidence checks on the electronics. After all micro-controllers complete their tests,
results are reported back to the DIAG micro-controller. If an error has been detected,
the appropriate error message is reported and/or modem dial-out routine executes.
If the boot is successful, the DIAG micro-controller gives up its mastership role to the
DEC K-4.
3.2.2 Power-up Boot Sequence
The power-up boot sequence starts with a reset to the DIAG micro-controller. At
reset the DIAG micro-controller is programmed as the master of the SPI bus and is
initialized as follows:
Serial Communication: 9600 baud, 8 data bits, 1 stop, no parity
Serial Peripheral Interface (SPI) Communication mode: Master Mode
Operator Control Panel (OCP) held in reset
Digital Engine Controller (DEC-K4) held in reset
DSP held in reset
After the DIAG micro-controller initializes, it looks for a keyboard input (waits 5 sec-
onds). A keyboard input could come from the diagnostic port via a PC connected
directly or through a remote modem connection. If a key is pressed during this time,
the boot sequence and the diagnostics in the monitor mode abort.
If no key is pressed, the boot checks to see if a modem is present by sending an AT
modem command. If there is a modem response (OK), the dial-out feature enables.
If there is no response, the dial-out feature disables.
Содержание Avantra 36/44
Страница 1: ...The Avantra 36 44 Service Manual Part Number 580078 0002 ...
Страница 24: ...Section I Imagesetter ...
Страница 282: ...Section II Bridge ...
Страница 327: ...Section III Buffer ...
Страница 359: ...Section IV On line Processor ...
Страница 462: ...Avantra 36 44 Service Manual B 2 Spare Parts Avantra 36 44 OLP Parts ...
Страница 464: ...Avantra 36 44 Service Manual B 4 Spare Parts Avantra 36 44 OLP Parts ...
Страница 466: ...Avantra 36 44 Service Manual B 6 Spare Parts Avantra 36 44 OLP Cassette Parts ...
Страница 468: ...Avantra 36 44 Service Manual B 8 Spare Parts Avantra 36 44 OLP Feed Rack Parts ...
Страница 470: ...Avantra 36 44 Service Manual B 10 Spare Parts Avantra 36 44 OLP Tank Parts ...
Страница 472: ...Avantra 36 44 Service Manual B 12 Spare Parts Avantra 36 44 OLP Right Side View Parts ...
Страница 474: ...Avantra 36 44 Service Manual B 14 Spare Parts Avantra 36 44 OLP Control Panel Parts ...
Страница 476: ...Avantra 36 44 Service Manual B 16 Spare Parts Avantra 36 44 OLP Rack Spare Parts ...
Страница 478: ...Avantra 36 44 Service Manual B 18 Spare Parts Avantra 36 44 OLP Dryer Spare Parts 18 ...
Страница 480: ...Avantra 36 44 Service Manual B 20 Spare Parts Electronics upper Spare Parts ...
Страница 482: ...Avantra 36 44 Service Manual B 22 Spare Parts Electronics lower Spare Parts ...
Страница 484: ...C 1 Appendix C Wiring Diagrams ...
Страница 491: ...Section V Crane ...
Страница 521: ...Avantra 36 44 Service Manual I 4 Index ...