Denon DVD-1720/556 Service Manual page 12

Reference Notes
1. CAUTION 1: Locking Tabs (L-1), (L-2), (L-3) and
(L-4) are fragile. Be careful not to break them.
1) Release two Locking Tabs (L-1), then release
two Locking Tabs (L-2).
2) Release three Locking Tabs (L-3).
3) Disconnect connector CN2001 and remove the
Front Assembly.
2. CAUTION 2: Electrostatic breakdown of the laser
diode in the optical system block may occur as a
potential difference caused by electrostatic charge
accumulated on cloth, human body etc., during
unpacking or repair work.
To avoid damage of pickup follow next
procedures.
1) Short the three short lands of FPC cable with
solder before removing the FFC cable (CN201)
from it. If you disconnect the FFC cable
(CN201), the laser diode of pickup will be
destroyed. (Fig. D5)
2) Disconnect Connectors (CN301), (CN401) and
(CN601). Remove two Screws (S-5A) and
(S-5B) and lift the DVD Main CBA Unit.
(Fig. D5)
3. CAUTION 3: When reassembling, confirm the
FFC cable (CN201) is connected completely.
Then remove the solder from the three short lands
of FPC cable. (Fig. D5)
[1] Top Cover
(S-1)
(S-1)
(S-1)
Fig. D1
12
[3] Tray Panel
(L-4)
(L-4)
(L-2)
(L-1)
(L-1)
(L-3)
[4] Function CBA
[5] Front Assembly
DVD-1720/556
CN2001
(L-2)
[2] Front Unit
Fig. D2
(S-2)
(S-2)
Fig. D3