Denon AVR-3808CI Service Manual page 7

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µcom/DSP Error Display Mode
1. Operation Spec
µcom version display mode:
When the following conditions are satisfied at its starting state, error information is displayed before version information.
Starting method (same as µcom version display):
While pressing 2 buttons, "STATUS (S07)" and "RETURN (S19)", turn on Power switch.
Then, press "STATUS" button to display the following information on the FL Display.
2. Display Order
Error information Destination information Main-µcom version information
DSP version information
3. Display
Any one of the following list is displayed, in the priority of
Condition State
Sub-µcom NG No response from Sub-µcom
No response from DIR
DIR NG
When DSP boot, executing DSP reset makes no change to BUSY port "L".
DSP1 NG
No change to BUSY port "L" before issuing DSP command.
T E
When DSP data read, executing WRITE="L" makes no change to ACK="H". L 1 3 9 4 2 2 9 6 5 1 3
When DSP data read, executing REQ="L" makes no change to ACK="L".
When DSP data write, executing WRITE="H" makes no change to
ACK="H".
When DSP data write, executing REQ="L" makes no change to ACK="L".
When DSP special code boot, executing DSP reset makes no change to
BUSY port "L".
No change to BUSY port "L" before issuing DSP special read command.
No change to BUSY port "L" before DSP version read.
When DSP boot, executing DSP reset makes no change to BUSY port "L".
DSP2 NG
No change to BUSY port "L" before issuing DSP command.
When DSP data read, executing WRITE="L" makes no change to ACK="H".
When DSP data read, executing REQ="L" makes no change to ACK="L".
When DSP data write, executing WRITE="H" makes no change to
ACK="H".
When DSP data write, executing REQ="L" makes no change to ACK="L".
When DSP special code boot, executing DSP reset makes no change to
BUSY port "L".
No change to BUSY port "L" before issuing DSP special read command.
No change to BUSY port "L" before DSP version read.
Both SUB/DSP OK
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Sub-µcom version information
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Display
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(No error display, version display only)
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