Reference Multimeter / 8½ Digit Multimeter
List of Replaceable Parts
41
Remove the Transformer Assembly
1. Remove the top cover.
2. Remove the 2 x T10 Torx Panhead screws from the mains inlet protection PCA, turn the PCA over
and remove the wires from the cable guide.
3. Remove the 4 x Transformer fixing screws (T20 x Panhead), taking care as the transformer is now
loose.
4. Unplug the connector to the A3 Digital PCA.
5. Unplug the connector to the A1 Mains Switching PCA.
6. Unplug the connector from the A2 Analog PCA, taking care to release the wires from the cable
guide fixed to the chassis and thread the plug through the Chassis hole.
7. The Transformer is now free to be lifted from the chassis.
Remove A3 Digital PCA Assembly
1. Remove Rear Panel.
2. Unplug the connector to the Transformer.
3. Unplug the small ribbon connector that connects to the A2 Analog PCA.
4. Unplug the large ribbon connector from the Front-panel assembly.
5. Remove the 1 x T10 Torx panhead screw. The A3 Digital is now free from the unit.
Remove the A2 Analogue Assembly
1. Remove the top cover.
2. Open the 4 x small white cable guides and release wires
3. Unplug the 5-way and 2 x 2way connectors that connect the A1 Current Shunt PCA to the A2
Analogue PCA.
4. Remove the T10 Torx Panhead screw that holds the A1 Current Shunt PCA to the metalwork
(located between the small fan and the large relay).
5. Move the A1 Current Shunt PCA including the large ferrite up and out of the way.
6. Unplug the 11 x 2-way connectors from the front panel and rear-input assemblies. Lift these out of
the way, including the large ferrite near the front terminals.
7. Remove the glass fiber air deflector.
8. Unplug the 10-way connector to the transformer and move away.
9. Unplug the small ribbon cable going to the A3 Digital PCA. The A2 analog PCA including its
mounting plate and Insulators, can now be lifted straight up and out of the chassis.
10. 14 x Light Grey insulators are keyed into the mounting plate. To remove, rotate approximately ¼
turn and lift away.
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