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5
Service and Repair
E rror number and message
602: Internal IO to digitizer failed
603: LAN I/ O failure
604: Sample memory test failed
605: Sample memory DMA failed
606: Sample memory DMA address failed
607: Sample memory address line stuck low
608: Sample memory address line stuck high
609: Sample memory addressing failed
610: Sample clock PLL failed
612: External reference clock PLL failed
613: Input channel n: missing
614: Invalid channel n: for this model
615: Channel n: calibration gain DAC adjustment failed Analog Board for channel n
616: Channel n: calibration offset DAC adjustment
failed
618: Channel n: overvoltage protection test failed
620: Channel n: failed to transmit trigger
622: Channel n: DC blocking capacitor test failed
623: Channel n: with no attenuators failed
624: Channel n: (1:16) attenuator 1 failed
625: Channel n: (1:16) attenuator 2 failed
626: Channel n: (1:2) attenuator 3 failed
628: Channel n: x1.125 gain failed
629: Channel n: x2.250 gain failed
630: Channel n: x4.500 gain failed
631: Channel gain test failed
632: Calibration ground source failed
633: Calibration voltage source failed (50 Ohm)
634: Calibration voltage source failed (1 MOhm)
635: Channel n: 20 MHz filter failed
1. A failure of the Digital Board will cause these failures on all channels.
78
Probable Cause
Digital Board is most probable cause.
Be sure to test for -12 V Switched
power on the Carrier/ Processor Board
(see
page
75)
Carrier/ Processor Board
Digital Board
Digital Board
Digital Board
Digital Board
Digital Board
Digital Board
Digital Board
Digital Board
Analog Board for channel n
Indicates a mismatch between the
Carrier/ Processor Board and the
Analog Board(s). Entire unit should be
returned for repair.
Analog Board for channel n
Analog Board for channel n
Analog Board for channel n
Analog Board for channel n
Analog Board for channel n
Analog Board for channel n
Analog Board for channel n
Analog Board for channel n
Analog Board for channel n
Analog Board for channel n
Analog Board for channel n
Analog Board
Digital Board is most probable cause.
Be sure to test for -12 V Switched
power on the Carrier/ Processor Board
1
(see
page
75)
Digital Board
1
Digital Board
Analog Board for channel n
Agilent L4532A/ 34A Service Guide
1
1
1
1
1
1
1
1
1
1
1
1
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