Marantz 74 CD38/o1B - Radial Tracking Path Troubleshooting; Radial Tracking and Eye Pattern; Driver and Connection Checks; Flex Impedance and Sledge Motor

18
1)
-Radial tracking o.k.?
No
OTD
(testpoint
67)
activity.
2)
-Check driver 7060A.
Suppiy:
C2071,C2Q74.
Components:
C2067,C2068,C2069,R3068,R3069,R3070,R3071
,R3072,R3073.
3)
-Check connections
radiai
actuator.
Switch
power
off.
Measure
impedance
of
18 Ohm(-i-/-20%)
between
pin 1 and pin
4 of
connector
1052.
4)
-Check
impedance on
fiex.
Power off.
Disconnect
CDM-fiex.
Measure impedance of 18
0hm(-i-/-20%)
between pin
1 and pin
4 of
connector
1052.
5)
-Test siedge.
Power on.
invoke
service
mode
0.
Move siedge out (whith
search
forward
key).
Siedge moves to init
position after reieasing
key.
Not o.k.
if siedge
doesn’t
move,doesn’t reach
the
outer
position or makes
a
ratiing
noise at
the
inner
side.
6)-Check
driver 7061 B.
Suppiy: C2060,C2064.
Components: C2062,C2063,C2066,R3060,R3062,R3064,R3065,R3066,R3067.
70*Check connections
of siedge
drive.
Power
off.
Measure impedance of
11 Ohm(+/-20%)
between pin
5
and
pin
6
of
connector
1070.
8)-Check siedge
motor.
Remove
CDM.
Measure impedance
of
11
Ohm(+/-20%)
between
motor
terminais.
PCS
60
681
18