Philips AS660C/41 - CD Servo Servicing Hints

10-4
CD SERVO SERVICE HINTS
CHARGED
CAPACITORS
ON
THE
SERVO
BOARD
MAY
DAMAGE
THE
CDM-ELECTRONICS
WHEN
CONNECTION
A
NEW
CDM
MECHANISM.
THAT'S
WHY,
BESIDES
THE
SAFETY
MEASURES
LIKE
-
SWITSH
OFF
POWER
SUPPLY
- ESD PROTECTION
ADDITIONAL ACTIONS MUST BE TAKEN BY THE REPAIR TECHNICIAN.
ate
following
steps
have
to
be
done
when
replacing
the
CDM
mechanism:
.
Disconnect
old
CDM
flexfoil
from
printed
board
Connect
paperclip
to
CDM
flexfoil
to
short-circuit
flexfoil
(fig.
1)
Short-circuit
printed
board
with
brass-sheet
(4822
321
11197)
plugged
into
the
flexfoil
connector
(fig.
2)
Remove
old
CDM
mechanism
Position
new
CDM
mechanism
in
its
studs
Remove
short-circuit
from
printed
board
connector
Remove
short-circuit
from
flexfoil
of
new
CDM
8.
Connect
new
flexfoil
to
print
connector
(fig.
3)
NOTSRONS
Paper Clip :
fig. 1
Service Position for CDC module
1) Follow the dismantling sequence shown in page 3-3 before coming to service position A.
PCS 90 101