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Troubleshooting
CSA7404B, TDS7704B, TDS7404B, TDS7254B & TDS7154B Service Manual
6- 83
Diagnostic LED
Table 6--13 lists the actions performed at power-up of the power pc (PPC) and
the associated display on the diagnostic LED. Until the MPC106 is initialized
the LED is not active. RESET forces the display to .8. H, L, P, and a blinking --
indicate where the program is in the power-up sequence. As tests occur, the
associated number is displayed on the LED. A failing test displays a decimal
point and the test number.
Table 6- 13: Diagnostic LED
Diagnostic status
LED
Passed test
Testing
Test method
.8
MPC740 initialization,
MPC106 walking one test, or
MPC106 configuration test
Walk a one through configuration register. Use addresses
FEC00000 and FEE00000. A one is walked through the lower
data bus.
Requests the vendor identifier. Use addresses FEC00000 and
FEE00000. Vendor identifier data is presented on the lower
data bus. Data 0x0face106 is written to the MPC740 register
gpr2 if the correct vendor identifier is returned. If the incorrect
identifier is returned, data 0x01bad106 is written to the
register.
0
MPC740 initialization,
MPC106 walking one test, or
MPC106 configuration test
First PCI access test and
UART initialize
This is not a pass/fail test, only an attempt to read the PCI
bus. Read the configuration space of the SIO. The SIO should
return the vendor/device identifier (0x00021057), within
MPC740 gpr2 register. No data comparison or fault
determination occurs. DIP switches are not checked.
Set UART to 9600, n, 8, 1. No testing or fault reporting is
performed. Once completed, console is usable. Dip switches
are not checked.
1
First PCI access test and
UART initialize
PC87560 walking-one
Walk a one through the configuration register. Walk a one
through the AD bus.
2
PC87560 walking-one
PC87560 configuration
Request vendor/device identifier. Data 0x0face560 is written to
MPC740 register gpr6 if correct identifier is returned. If
incorrect identifier is returned, data 0x01bad560 is written to
MPC740 register gpr6.
3
PC87560 configuration
DEC21554 configuration
Request vendor/device identifier. Data 0x0face215 is written to
MPC740 register gpr6 if correct identifier is returned. If
incorrect identifier is returned, data 0x01bad215 is written to
MPC740 register gpr6.
4
DEC21554 configuration
RS232 interface test
Send UUUUUUUU (55hex, 1010101 binary) to console.
5
RS232 interface test
ROM checksum
Calculate device checksum and compare with checksum in
ROM.
6
ROM checksum
DRAM cell test with cache
Test address lines. Write patterns to address range set by
switch 1. From start address (000000000) to end address,
write hex pattern aaaaaaaa. Repeat for hex patterns cccccccc
and f0f0f0f0.
Содержание CSA7404B
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Страница 14: ...Table of Contents x CSA7404B TDS7704B TDS7404B TDS7254B TDS7154B Service Manual ...
Страница 18: ...Service Safety Summary xiv CSA7404B TDS7704B TDS7404B TDS7254B TDS7154B Service Manual ...
Страница 20: ...Environmental Considerations xvi CSA7404B TDS7704B TDS7404B TDS7254B TDS7154B Service Manual ...
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Страница 75: ...Performance Verification ...
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Страница 80: ...Performance Verification 4 4 CSA7404B TDS7704B TDS7404B TDS7254B TDS7154B Service Manual ...
Страница 92: ...Brief Procedures 4 16 CSA7404B TDS7704B TDS7404B TDS7254B TDS7154B Service Manual ...
Страница 120: ...Performance Tests 4 44 CSA7404B TDS7704B TDS7404B TDS7254B TDS7154B Service Manual ...
Страница 215: ...Adjustment Procedures ...
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Страница 219: ...Maintenance ...
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Страница 228: ...Maintenance 6 8 CSA7404B TDS7704B TDS7404B TDS7254B TDS7154B Service Manual ...
Страница 242: ...Removal and Installation Procedures 6 22 CSA7404B TDS7704B TDS7404B TDS7254B TDS7154B Service Manual ...
Страница 308: ...Troubleshooting 6 88 CSA7404B TDS7704B TDS7404B TDS7254B TDS7154B Service Manual ...
Страница 310: ...Repackaging Instructions 6 90 CSA7404B TDS7704B TDS7404B TDS7254B TDS7154B Service Manual ...
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Страница 319: ...Replaceable Electrical Parts ...
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Страница 323: ...Diagrams ...
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Страница 327: ...Replaceable Mechanical Parts ...
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