GE HEALTHCARE
DIRECTION 2307224-100, REVISION 6DISCOVERY LS SYSTEM SERVICE MANUAL
Page 216 Chapter 6 - Table
6.3.2 CT-PET Position Latch Solenoid Fails to Engage
6.3.2.1 Symptom
Refer to Figure 6-78 on page 166. The CT-PET Position Latch Solenoid fails to engage.
6.3.2.2 Probable Causes and Suggestions
1.) Bad solenoid. Replace the entire CT-PET Position latch assembly. Go to page 174 and check
the relationship between the latch arm and the pin. Go to page 182 and adjust the table latch
assembly. If necessary, characterize the base.
2.) Burned trace on the ETC I/F board. Check trace 15 and 16 on the J27 and J7 connectors on
the ETC I/F board.
• If a soldering iron and 30 gauge wire is available, solder replacement wires from J7 Pin 15
to J27 Pin 15 and J7 Pin 16 to J27 Pin 16.
• Otherwise, replace the ETC board.
6.3.3 Table Base or Cradle Unlatches
6.3.3.1 Symptom
The table base or cradle unlatches when pressing the Move to Scan button.
6.3.3.2 Probable Causes and Suggestions
Incorrect version of firmware. Call the Online Center.
6.3.4 Delta Z Not in Spec
6.3.4.1 Symptom
Image Alignment software reports that Delta Z is not in spec.
6.3.4.2 Probable Causes and Suggestions
1.) VQC report displays incorrect direction. Turn the positioning screw in the direction opposite
the displayed direction.
2.) CT Detent in the wrong location. Measure the distance between the notches on the detent
flags. The distance should equal 675 +/-14 mm.
6.3.5 Clutch Engages - Motor Does Not Spin
6.3.5.1 Symptom
The clutch engages, but the motor does not spin.
6.3.5.2 Probable Causes and Suggestions
Go to Section 6.2.6.11, and follow the instructions from page 143 to page 148. Check the Table
Bulkhead and Clutch Driver Unit cable connections.
6.3.6 Motor Spins - Clutch Does Not Engage
6.3.6.1 Symptom
The motor spins, but the clutch will not engage.
6.3.6.2 Probable Causes and Suggestions
Check the fuse on the Clutch Driver Unit.
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