DV-NC55 (serv.man5). Disassembly instructions - Sharp DVD Service Manual (repair manual). Page 4

<Replacing the pickup and the spindle motor>

Since the pickup optical axis and turntable inclination of DVD are adjusted with higher accuracy than of CD/MD, make a replacement
as a mechanism service chassis ass'y (refer to Parts List).

Front Side

Sled Motor Lead Wire

Pickup FFC

Traverse Fixing Screw

Loading Motor Lead Wire

Pickup interface PWB

Pickup FFC

Short Land

<Take out disk>

1. Remove the mechanism with angle from the set (refer to  35  on page 156).
2. It is in such cases as the thin driver, and it is pushed in slowly, and a tray is drawn in the arrow direction the slide rack on the

left of the base chassis.

3. Take out disk.

<Disassembling and assembling the mechanism chassis>

1. After setting the mechanism chassis to the angle state, ground it to prevent the electrostatic discharge damage of the pickup.
2. Remove  S  and the DVD shield (lower)  56  (refer to the illustration on page 156).
3. Remove  P ,  Q ,  Z  and  R   83  from the DVD main PWB unit  68 , and loosen the 4 screws  45  to remove the DVD main PWB

unit  68 . (Pickup relay FFC 74  isn't removed.) (refer to the illustration on page 156)

4. Remove screws fixing the base chassis (located at the back right and at front left when facing the set).
5. With the pickup FFC connected, turn over the base chassis and short (solder) two short lands on the pickup interface PWB in

order to prevent the electrostatic discharge damage of the pickup.

6. Remove the pickup FFC from the main PWB.
7. Remove the pickup FFC from the pickup interface PWB.
8. Remove the traverse mounting screws to remove the traverse chassis ass'y.
Note: After assembly and wiring, remove the solder joint of the short land. If short-circuited, a disk is not played back.