Simulated Failure Symptoms - Quick Fixes - Panasonic SAHT730 - DVD THEATER RECEIVER Technical Manual

3. Simulated Failure Symptoms – quick fixes
Although sensor failures cause the following symptoms listed in table 3, the more
common failure is an internally broken ribbon cable that carries the sensor signal to
the microprocessor.
To determine which is at fault, begin testing using figures 4 and 5 or order the cable
with the corresponding sensor. For example the motors (#6 & #7 in table 3) and
S9001 (#4) can be quickly checked with an ohmmeter at the CN2010/2011 cable end
(see figures 4 or 5). If the part tests bad bypass the cable and recheck the part right
at the part's terminal.
CN2010 ribbon cable p/n = REZ1484 (11 pins)
CN2011 ribbon cable p/n = REZ1483 (10 pins)
Sensor
1. Disc Det Q9103
open
2. Tray rotation Q9102
open.
3. Tray position
Q9101 open.
4. Main gear position
Q9001 open.
5. Tray out switch
S9001 open.
6. Tray Loading Motor
7. Tray Rotation Motor
SA-HT730 / SAHT930
Simulated Failures
Cable
CN2010 No disc detected (no PB possible).
CN2010 Tray motor rotates back & forth for ¼ rotation then
shuts down. H01 error code shown.
CN2010 Slow continuous CCW rotation of the tray. "INIT"
appears and no buttons work except power.
CN2011 Tray moves out and spins, then the tray moves in.
and the mech clamps & then unclamps. Repeats.
CN2011 Normal start up. Pressing the open tray button
permits the tray to open but it closes
automatically.
CN2011 Front panel display = "Please Wait" or
"Open/Close"
CN2010 Front panel display = "Please Wait"
Table 3
Symptom
7
Comments
Unit shuts
down.
Unit does not
shutdown.
Unit does not
shutdown.
Tray will not
stay open.
Motor = 14
ohms