Error Display - Denon AVR-1912E3 Service Manual

1.3. Error display

See the following table for each "Error information" display and its explanation (status).
Display order is q , w , e , r , t .
Condition
Compared with the destination setting
on the board. This is displayed when the
q
Firm Check model name or destination information
NG written into the firmware does not match.
( b )
w
No response from DIR.
DIR NG
When DSP code boot is performed, the
DSP FLAG0 port does not change to "H"
even if DSP reset is executed.
Before DSP command is issued, the DSP
BUSY port does not change to "L". d
When DSP data read is performed,
executing WRITE="L" does not result in
ACK="H".
e
When DSP data read is performed,
DSP NG
executing REQ="L" does not result in
ACK="L".
When DSP data writing is performed,
executing WRITE="H" does not result in
ACK="H".
When DSP data writing is performed,
executing REQ="L" does not result in
ACK="L".
Error occurs in EEPROM checksum.(*** is
r
EEPROM NG a block address number.)
t
Both DSP /
EEPROM OK
b
The written Firmware and product settings
(model name, brand name, destination)
are compared. If Firmware that is not
designed for this product is written, ▲ is
displayed in the first column, as shown on
the right. d
Status
(No error display, version display only)
Status
FL Display
F I R M E R R O R
D I R E R R O R
D S P E R R O R
D S P E R R O R
D S P E R R O R
D S P E R R O R
D S P E R R O R
D S P E R R O R
E 2 P R O M E R R * * *
FL Display
M a i n : * * * * * * * *
D S P
A u d i o P L D : * * . * *
O S D : * * * * * * * *
22
Trouble shooting
• Please check the
destination-resistors
(R773/R776, HDMI
B'D).
• Please write the
firmware of correct
destination.
• Please check DIR
（IC21, HDMI B'D) and
0 1
around circuits.
0 1
0 2
0 3
• Please check DSP
（U8, HDMI B'D) and
around circuits.
0 4
0 5
0 6
: * * . * *