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Ultraview 1030/1050 Monitors — Service Manual

5-22

During normal operation, D2 will be dimly lit (it is actually flashing very rapidly). LED Error Codes

are shown in Table 2.

Table 2: Recorder Error Codes

Error

Code

(hex)

Failed Assembly or Likely Cause Program Modules

80 EPROM checksum bad

Recorder Code

Diagnostics

(RCDIAG)

8F Stack pointer bad RCDIAG

81 Internal RAM won’t write all zeroes RCDIAG

82 Internal RAM won’t write all ones RCDIAG

83 Timer 0 - No overflow RCDIAG

84 Timer 0 - High byte bad RCDIAG

85 Timer 0 - Low byte bad RCDIAG

86 Timer 1 - No overflow RCDIAG

87 Timer 1 - High byte bad RCDIAG

88 Timer 1 - Low byte bad RCDIAG

30 SDLC Errors - Bad Xmit status RCDIAG

31 SDLC Errors - No SI RCDIAG

32 SDLC Errors - No start flag RCDIAG

33 SDLC Errors - Bad address RCDIAG

34 SDLC Errors - Bad frame type RCDIAG

35 SDLC Errors - No end flag RCDIAG

10 Stuck I/O bus bit 0 low RCDIAG

11 Stuck I/O bus bit 1 low RCDIAG

12 Stuck I/O bus bit 2 low RCDIAG

13 Stuck I/O bus bit 3 low RCDIAG