Philips CD692 - Page 27

cted
gram
mode
‘input
CHECK OF THE PHOTODIODES
signal Signal depends on Distance tens «>
IR LED of remote control
T-23366A
CHECK OF LASER SUPPLY
The laser, the lasersupply plus the monitor diode form a feedback system.
A defect in the lasersupply may result in the destruction of the laser. If, in that case, the laser is replaced, (= complete
C.D.M.-unit) the new laser will also become defective. However, it is impossible to check and repair a feedback system if
a link is missing. For this reason the laser supply can be checked with teh replacement circuit for laser assembly.
1 SK
2 Sk
CONNECT
to LM DIRECTLY
TO PANEL
10.)
The:
teewack
sysiem’
sees
te-vit.
inet
the
same
amount
of
current
flows
trough
ihe
LED
[BF recon cn 3 Shas
fel | lel Oe fore [toe
After
opening
SK,
the
led
will
emit
more
light
for
a
short
moment.
Sag
CHECK OF CDM-9
[Stee] Signal_[ Mode [| |
1 | S current i tonal 56<mV<76
= voltage iy (v) <2)
WARNINGS
across
R3000
1. Never disconnect flex when power is on.
2. Laser power is adjusted during the production process
and may not be readjusted.