Although the design is greatly simplified from previous optical assemblies, the entire chassis must be removed to access it.
LAMP DRIVER
This board is not as easily accessible as were prior designs
The entire chassis must be removed to access this circuit.
REAR COVER REMOVAL
NEW LOCKING CONNECTORS
- Three types of locking connectors are used to secure the wiring to the circuit boards. Other types of locking connectors are used for cable-to-cable connections and these have been used in the past so they will not be covered. The connectors used on the circuit boards are of a small design and it is not easy to identify the locking mechanisms used unless one is already aware of them. Because of their small size, they could be easily damaged if an attempt is made to pull them directly out of their socket. The illustration below shows the 3 types of connectors and how they are released.
- Place the chassis assembly aside to begin the next steps to remove the Lamp Driver or Optical Block. Note how the wire harness is rested on top of the B Block to protect the connectors from snagging onto other items. [How to remove chassis will be illustrated by next post].
RE-INSTALLING WIRE HARNESS
- When re-installing the chassis, it is important to install the wire harness properly. If it is not, the B Block assembly will not seat correctly and wires may be damaged. The most important step is to place the harness in the upper retainers as shown below so that it rests below the cabinet ridge to clear the backside of the B Block.
LAMP DRIVER AND OPTICAL BLOCK REMOVAL
- The following steps will remove these items from the cabinet assembly. The units will be separated and each can be serviced from that point.
- The Lamp Driver and Optical Block must now be separated in order to service the units individually.
LAMP DRIVER DISASSEMBLY
- This step disassembles the Lamp Driver housing to gaIn access to the Lamp Driver board. NOTE: When re-installing the lamp connector to the brackets, make sure the connector is installed as shown. The connector should sit flat on the bracket and the tabs on the ends should seat flush with the bracket. If not done correctly, the lamp cannot be installed.
OPTICAL BLOCK REPLACEMENT
- Replacement Optical Blocks are shipped as shown, minus the Iris and LVDS cables. Transfer these cables and any cloth tape pieces to the new Optical Block.
