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Troubleshooting
6--68
TDS7104 & TDS7054 Service Manual
Table 6--10: Beep codes (Bali) (Cont.)
Beeps
Description
8
Display memory R/W error
9
ROM checksum error (not used)
10
CMOS shutdown register test error
11
Invalid BIOS (for example, POST module not found, etc.)
BIOS Beep Codes (Radisys NLX)
When the NLX board powers on, a number of the BIOS checkpoints generate an
audible ‘beep’ code on failure using the standard PC speaker (also routed through
the board audio system). The beep codes are made up of up to 4 groups of short
beeps and are listed in Table 6--11.
If your instrument does not contain a speaker, attach a speaker to the display-
adapter board square pins to hear the codes.
Table 6--11: Beep codes (Radisys)
Check-
point code
Error message
Beep code
16h
BIOS ROM checksum
1-2-2-3
20h
Test DRAM refresh
1-3-1-1
22h
Test 8742 keyboard controller
1-3-1-3
2Ch
Test 512 Kb base address lines
1-3-4-1
2Eh
Test low byte of 512 Kb base memory
1-3-4-3
46h
Check ROM copyright notice
2-1-2-3
58h
Test for unexpected interrupts
2-2-3-1
98h
Search for option ROMs (beep for bad checksum)
1-2
B4h
One beep before boot
1
Dip Switch Controls
Dip switches are used to direct program flow during power on self test (POST).
A switch set to ON is closed and presents a low state (0 V) to the switch buffer.
This is the default switch position. A switch set to OFF is open and presents a
high state (3.3 V) to the switch buffer. This is the ‘set’ position. Table 6--12
describes the switch functions.
Содержание TDS7054
Страница 4: ......
Страница 14: ...Table of Contents x TDS7104 TDS7054 Service Manual...
Страница 18: ...Service Safety Summary xiv TDS7104 TDS7054 Service Manual...
Страница 22: ...Preface xviii TDS7104 TDS7054 Service Manual...
Страница 56: ...Operating Information 2 12 TDS7104 TDS7054 Service Manual...
Страница 60: ...Theory of Operation 3 4 TDS7104 TDS7054 Service Manual...
Страница 64: ...Performance Verification 4 4 TDS7104 TDS7054 Service Manual...
Страница 76: ...Brief Procedures 4 16 TDS7104 TDS7054 Service Manual...
Страница 86: ...Performance Tests Semi Automated Method 4 26 TDS7104 TDS7054 Service Manual...
Страница 144: ...Performance Tests 4 84 TDS7104 TDS7054 Service Manual...
Страница 160: ...Maintenance 6 6 TDS7104 TDS7054 Service Manual...
Страница 165: ...Removal and Installation Procedures TDS7104 TDS7054 Service Manual 6 11 Figure 6 2 Knob removal...
Страница 230: ...Troubleshooting 6 76 TDS7104 TDS7054 Service Manual...
Страница 232: ...Repackaging Instructions 6 78 TDS7104 TDS7054 Service Manual...
Страница 238: ...Electrical Parts List 8 2 TDS7104 TDS7054 Service Manual...