Philips MCM8/21 Service Manual page 46

Service hints
CAUTION
CHARGED CAPACITORS ON THE SERVO BOARD MAY DAMAGE THE CD DRIVE ELECTRONICS WHEN
CONNECTING A NEW CD MECHANISM. THAT´S WHY, BESIDES THE SAFETY MEASURES LIKE
• SWITCH OFF POWER SUPPLY
• ESD PROTECTION
ADDITIONAL ACTIONS MUST BE TAKEN BY THE REPAIR TECHNICIAN.
The following steps have to be done when replacing the CD mechanism:
1. Disconnect flexfoil cable from the old CD drive
2. Put a paperclip onto the flexfoil cable to short-circuit the contacts (fig.1)
3. Remove the old CD drive
4. Remove paperclip from the flexfoil cable and connect it to the new CD drive
5. Position the new CD drive on its studs
6. Remove solder joint from the Laser unit (see below)
Attention: The laser diode of this CD drive is protected against ESD by a solder joint which short-circuits the
laser diode to ground.
For proper functionality of the CD drive this solder joint must be removed after connecting the drive to
the set.
Emergency open
In case of a Supply fault, the drawer can be opened manually.
1. Remove the top cover of the set to get access to the CD Module.
2. Proceed as shown in picture below.
10-2
fig.1
Service hints
Dismantling of Drawer
1. Open the drawer and release 2 catches
as shown in fig. 2
2. Pull drawer out.
Assembling of Drawer
→ see
1. Check if slider is on the right side
picture below.
2. If necessary - move slider to the right end
position first.
3. Insert the Drawer.
10-2
fig.2