Service manual

Wells-Garnder Color Vector Monitor Guide
Page 42 of 73
Version 2 Deflection Board
Perform the following procedure for Version 2 of the Wells-Gardner 6100 display.
1. Verify that the Preliminary Procedure has been performed. [see above]
2. Use a 1/4-inch hex driver to secure the modified Deflection PCB to the display chassis.
CAUTION! Make certain that the harness from Q705 and Q706 is connected to P700
and not P100.
3. Connect the harnesses to the appropriate Deflection PCB connectors.
Version 3 Deflection Board
Perform the following procedure for Version 3 of the Wells-Gardner 6100 display.
1. Verify that the Preliminary Procedure has been performed. [see above]
2. Locate the wire connected to resistor R1 (22K ohm) and the collectors of transistors Q1
and Q3 (type 2N3904) on the Input Protection Circuit PCB and the point shown in Figure
7 on the Deflection PCB.
3. Use a wire cutter to cut the wire, located in step 2, halfway between the two PCBs.
4. Use a soldering iron to solder a 1K-Ohm, +/-5%, 1/4 W resistor (not included in the kit)
between the two ends of the wire cut in step 3.
5. Use a 1/4-inch hex driver to secure the modified Deflection PCB to the display chassis.
CAUTION! Make certain that the harness from Q705 and Q706 is connected to P700
and not P100.
6. Connect the harnesses to the appropriate Deflection PCB connectors.
Version 4 Deflection Board
Perform the following procedure for Version 4 of the Wells-Gardner 6100 display. NOTE: This
version of the display requires that an Input Protection Circuit PCB assembly be installed on the
Deflection PCB as part of the display modification procedure. This PCB assembly is not
included in the kit. However, to obtain the Input Protection Circuit PCB assembly, use the order
form at the back of this document.
1. Verify that the Preliminary Procedure has been performed. [see above]
2. Install the Input Protection Circuit PCB to the Deflection PCB as described in the
instructions supplied with the Input Protection Circuit PCB assembly.
3. Use a 1/4-inch hex driver to secure the modified Deflection PCB to the display chassis.
CAUTION! Make certain that the harness from Q705 and Q706 is connected to P700
and not P100.
4. Connect the harnesses to the appropriate Deflection PCB connectors.