Philips CD911 - Page 18

18
18
Radial tracking
path
1)-Radial tracking 0.k.?
No OTD (testpoint 67) activity.
N
Radial tracking
2)-Check driver 7060A.
Supply: C2071,C2074.
Components:
C2067,C2068,C2069,R3068,R3069,R3070,R3071,R3072,R3073.
.
3)-Check connections radial actuator.
Switch
power
off.
N
Measure
impedance
of
18
Ohm(+/-20%)
between
pin
1
and
pin
4
of
connector
1052.
Eye
pattern
Driver
7060A
0.k.?
0.k.?
4)-Check impedance on flex.
Power
off.
Y
Disconnect CDN-flex.
Measure
impedance
of
18
Ohm(+/-20%)
between
pin
1
and
pin
4
of
connector
1052.
Check
Check
lightpath
decoder
Connections
Impedance
5)-Test
sledge.
radial
motor
of
flex
Power
on.
0.k.?
Invoke service mode 0.
Move
sledge
out
(whith
search
forward
key).
Repl
Sledge
moves
to
init
position
after
releasing
key.
Con”
Not
o.k.
if
sledge
doesn’t
move,doesn’t
reach
the
outer
position
or
makes
a
ratling
invoke
saniice
noise
at
the
inner
side.
nM
ode
o
6)-Check driver 7061B.
Supply: C2060,C2064.
Components:
C2062,C2063,C2066,R3060,R3062,R3064,R3065,R3066,R3067.
7)-Check connections of sledge drive.
Power off.
Measure
impedance
of
11
Ohm(+/-20%)
between
pin
5
and
pin
6
of
connector
1070.
Y
8)-Check
sledge
motor.
Driver
Remove
CDM.
‘Check
IC7061B
Measure
impedance
of
11
Ohm(+/-20%)
between
motor
terminals.
lightpath
o.k.?
Replace
CDM
connection N
sledge
o.k.?
N
Impedance
sledge motor
0.k.?
Y
Y
Replace :
IC7000 Job done Replace Repair bad
CDM connection
PCS 60 681