Zenith PRO 895x/900x

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Vertical board

The V board flips up to expose the component side. The V board contains the output section for the convergence section and for the vertical deflection.

The V board has a green LED on it to indicate that the V output section is working correctly. Generally this board is reliable and gives few problems. A convergence problem with one tube will usually indicate a problem on this board. The V and convergence connectors are also located on the bottom of this board to orient correct projection depending on the mounting of the set. The orientation is stamped right on this board at each connector.

CRT sockets

The CRT sockets and the CRT tubes in general are very reliable and do not fail. All of the wiring save for the ground leads will unplug at the tubes. The thick focus lead that goes into the CRT socket will come out of the CRT socket once all other wiring is disconnected. The CRT socket as a plastic tab that flips out, releasing the focus wire.

HV quadrupler

Similar to the PRO 851, the PRO 880 and PRO 900 sets used a 2 piece focus block. One part contains the focus controls that are siliconed into place, and permanently stuck G2 controls. Since this set has an AKB adjustment, the G2 controls are permanently set and never need adjustments. The other part of the HV splitter/quadrupler sits between the R and B tubes at the bottom of the chassis. This block can crack and arc and cause other problems in the set. Replacement is done as a whole, these blocks cannot be repaired.

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