Dentsply Sirona
Operating Instructions CEREC AC Connect
10 PC Diagnostic Tool
10.4 Troubleshooting
64 32 087 D3492
D3492.201.07.24.02 07.2018
83
10.4.1
Customer Diagnostics & Technician Diagnostics
Test
Test description / condition
Action if problems occur
Display Script
Control command without a test
function
n.a.
Activity is rotating cursor
Test CPU-1
The CPU test checks the control,
address, data, and flag register of
the system processor.
When testing the floating point unit
(NPU, Numeric Processing Unit) the
system's mathematics processor
and the interface between the two
functions are checked.
➢ Replace the PC.
Test CPU-2
Test NPU-1
Test NPU-2
Test Timer
In this test a number is loaded into
the three timer channels and then a
check is made on whether the
countdown takes place at the right
speed in the individual channels
(not too fast or too slow).
➢ Replace the PC.
Test Keyboard Controller
This test checks the proper function
of the electrical circuit for the key-
board controller.
➢ Replace the PC.
Test INT #1
The test tool checks the system in-
terrupt controller. These controllers
contain the interrupt mask register,
in-service register, interrupt request
register, and all of the interrupt re-
quest lines. All channels on the in-
terrupt controllers are checked for
problematic, incorrect, or defective
interrupts.
➢ Replace the PC.
Test INT #2
Test DMA #1
During the test all of the registers
and status ports of the two DMA
controllers are checked. The DMA
controller is extremely important for
system operation, as it has separate
channels which the E/A devices can
use to directly access the system
RAM. This enables high data trans-
fer rates without using the micropro-
cessor.
➢ Replace the PC.
Test DMA #2
Test SM Bus
This test checks the SMBus. This
bus is mainly used in systems to
manage the battery and sensor. The
SMBus is also used to access the
SPD data on the memory modules.
➢ Replace the PC.
Содержание CEREC AC
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