Denon AVR-X4000 Service Manual page 23

Condition
t
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".
When DSP data read is performed, executing
WRITE="L" does not result in ACK="H".
y
When DSP data read is performed, executing
DSP1 NG
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".
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".
When DSP data read is performed, executing
WRITE="L" does not result in ACK="H".
u
When DSP data read is performed, executing
DSP2 NG
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".
i
Error occurs in E2PROM checksum.(*** is a
E2PROM
block address number.)
NG
o
Both DSP /
EEPROM
OK
b 1, b 2
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.
Status
(No error display, version display only)
Status
FL Display
D I R E R R O R
D S P 1 E R R O R
D S P 1 E R R O R
D S P 1 E R R O R
D S P 1 E R R O R
D S P 1 E R R O R
D S P 1 E R R O R
D S P 2 E R R O R
D S P 2 E R R O R
D S P 2 E R R O R
D S P 2 E R R O R
D S P 2 E R R O R
D S P 2 E R R O R
E 2 P R O M E R R * * *
FL Display
M a i n : * * . * *
S U B : * * . * *
D S P 1 : * * . * *
D S P 2 : * * . * *
A u d i o P L D : * * . * *
G U I : * * * * * * * *
23
Trouble shooting
• Please check DIR
（IC403, DIGITAL B'D)
0 1
and around circuits.
0 1
0 2
0 3
• Please check DSP
（IC408, DIGITAL B'D)
0 4
and around circuits.
0 5
0 6
0 1
0 2
0 3
Please check DSP
（IC421, DIGITAL B'D)
0 4
and around circuits.
0 5
0 6