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Watkiss Automatic SpineMaster Service Manual - Edited 17/06/04
Service Procedures
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Replacing Components
4. Remove the PCB.
5. When fitting the new PCB, check that all the fuses are the correct rating as
this PCB is used in other products (see 7.1).
4.8.3 Replacing the Transformer
The Transformer may need replacing if there is no power supply to the Power
Interface PCB, or if the Mains Input fuses blow regularly.
Procedure
1. Switch off the power and disconnect the mains input lead. Position the
ASM so that the RH side is easily accessible.
2. Remove the RH Side Cover.
3. Remove the power and earth cables from the Power Interface PCB Assem-
bly. Note their position for refitting. The cables will only fit into the cor-
rect connector in the correct orientation (see Figure 4:27).
4. Remove the Infeed Assembly (see 4.6.1) to give access to the Transformer
mounting screws.
5. Remove the M5 screws that hold the Transformer in place, remove Trans-
former.
6. When fitting the new Transformer Assembly, be sure to attach the earth
lead.
CAUTION
Before switching on the machine, check the voltage tappings on the
Transformer (see 7.4).
4.8.4 Replacing the Carriage Motor Ballast Resistor
The Ballast Resistor, fitted in to the Wiring Loom between PCB 900-197 and
the Carriage Motor, is a current surge-limiting device. In the unlikely event
that this component should fail, it is a recommended precaution that the com-
plete assembly be replaced in case of wiring damage.
PARTS REQUIRED
TOOLS REQUIRED
908-882 Transformer Assy.
3mm Allen Key
4mm Allen Key
8mm Spanner
Figure 4:27 Electrical Power Assembly
PCB 900-141
Transformer
PARTS REQUIRED
TOOLS REQUIRED
905-377 Carriage Motor Ballast Resistor Assy
2.5mm Allen Key
3mm Allen Key
