Denon ACD-HD Owner's Manual

•  The ACD-HD is an option board exclusively for the TU-604CI.
•  This option board can be used as an HD Radio when inserted in 
one of the option slots on the main unit's rear panel.
•  The option board can be inserted into any of the option slots (3 
to 6) on the rear panel.
•  Read the main unit’s manual carefully before assembling.
•  For operating instructions, see the TU-604CI’s owner’s manual.
Check that the following parts are supplied with the product.
q Owner’s manual ...................................................................... 1
w Warranty (for North America model only) ................................ 1
e Service station list ...................................................................1
r Audio cable .............................................................................. 1
t AM loop antenna (Large) ......................................................... 1
y FM indoor antenna ..................................................................1
u Hand screw .............................................................................2
Accessories
r t y
u

1
Unplug the power cord.
2
Make  the  preparations  for  mounting  the  option 
board.
n When mounting an option board for the first time
n When replacing option boards
3
Insert the option board.
4
Use the two xing screws to fasten the option board to 
the main unit.
Remove  the two  screws  fixing the 
cover, then remove the cover.
q  Remove  the  two  screws  fixing 
the option board.
w  Screw  in  the  two  hand  screws 
about  5  mm,  then  pull  out  the 
option board.
e   Remove the two hand screws.
e
 
ACD-HD 
[Option Board]  Owner’s manual
NOTE
Always  be  sure  to  turn  off  the  power  and  unplug  the  power  cord 
before mounting or removing option boards. Doing so with the power 
turned on could cause damage.
Installing
NOTE
Push  the  option  board  all  the  way 
in.
NOTE
Not  fixing  the  option  board  with 
the  two screws could  lead  to  poor 
contact or other problems.
When replacing an option board, we recommend mounting the two 
hand  screws removed  in  step 2  to  the option  board  to store them. 
(See the diagram above.)
• Reuse  the  two  fixing  screws  to 
fasten the option board.
• Be  sure  to  keep  the  removed 
cover for future use.
Denon Brand Company, D&M Holdings Inc.
Printed in China   00D 511 4741 001
www.denon.com
Reuse  the  two  fixing  screws  to 
fasten the option board.
CAUTION:
•  Because  of  risk  of  accidental  ingestion,  please  keep  small 
components such as screws out of reach of children.
• Never disassemble or modify the unit in any way.

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