Trio™ Service Manual
0070-10-0591-01
4 - 15
Repair Information
Disassembly Instructions
4.5.5
Removal of PCB Chassis Assembly
1.
Remove four (4) 3 x 6 mm Phillips panhead screws from rear housing.
2.
Remove two (2) 4 x 10 mm Phillips panhead screws from bottom of rear housing.
3.
Carefully pull entire PCB chassis assembly, along with right side parameter panel,
forward until it is completely removed from the rear housing.
4.
Disconnect cable assemblies from connectors JP1 and JP3 of thermal printhead
Recorder.
4.5.6
Removal of Display Mounting Plate
1.
Remove two (2) 3 x 6 mm Phillips panhead screws at left and right of HV inverter PCB.
2.
Gently lift display mounting plate up from chassis assembly so that locking tabs at top of
mounting plate clear their slots.
3.
Pull display mounting plate forward and away from chassis assembly.
4.
Disconnect cable assemblies from P1 of CPU PCB (display cable assembly) and CN2 of
HV inverter PCB.
4.5.7
Replacement of 3V Lithium Cell Battery
1.
With the display mounting plate removed, the CPU PCB is accessible. A 3volt Lithium
cell battery is installed in the battery socket at the lower center of the CPU PCB.
2.
Using a small flat blade screwdriver, push the tab (located at the 7 o'clock position on
the battery holder) toward outer edge of battery socket.
3.
The 3 volt lithium battery should pop out of holder. Remove and discard battery.
4.
With positive (+) terminal facing up, push new 3 volt Lithium battery into battery holder
until tab locks battery in place.
4.5.8
Removal of Power Supply Assembly
1.
Remove two (2) 3 x 6 mm Phillips panhead screws at front left and front center of PCB
chassis assembly.
2.
Remove two (2) 3 x 6 mm Phillips panhead screws lower left side rear and lower right
side rear of PCB chassis assembly.
3.
Remove cable assemblies from J2, J10, J4, J5, and J3 of Power Supply PCB.
4.
Pull power supply assembly straight back from rear of PCB chassis assembly.
4.5.9
Removal of PCB Chassis Rear Panel Plate
1.
Remove four (4) 3 x 6 mm Phillips panhead screws from rear panel of PCB chassis.
2.
Remove rear panel plate. This will allow access to NIBP Module and optional IBP PCB.