Interconnections

Pin connectors are used to connect wires to the interconnecting pins. They are grouped together and mounted in a plastic holder and should be removed, reinstalled, or replaced as a unit. If an individual wire or connector in the assembly is faulty, the entire cable assembly should be replaced. To provide correct orientation of this multipin connector when it is reconnected to its mating pins, an arrow is stamped on the circuit board, and a matching arrow is molded into the plastic housing of the multipin connector. Be sure these arrows are aligned with each other when the multipin connector is reinstalled.

Table 6-4 Maintenance Aids

Description

Specifications

Usage

Example

1. Soldering Iron

15 to 25W.

General soldering and unsoldering.

Antex Precision Model C.

2. Torx Screwdrivers

Torx tips #T7, #T8, #T9, #T15 and #T20.

Assembly and disassembly.

Tektronix Part Numbers #T7) 003-1293-00 #T8) 003-0964-00 #T9) 003-0965-00 #T15) 003-0966-00 #T20) 003-0866-00

3. Nutdrivers

1/4 inch, 9/32 inch, 5/16 inch, 1/2 inch, and 9/16 inch.

Assembly and disassembly.

Xcelite #8, #9, #10, #16, and #18.

4. Open-end Wrenches

1/4 inch, 7/16 inch, 1/2 inch, 9/16 inch, and 5/8 inch.

Assembly and disassembly.

5. Allen Wrenches

0.050 inch and 1/16 inch.,

Assembly and disassembly.

6. Long-nose Pliers

Component removal and replacement.

7. Diagonal Cutters

Component removal and replacement.

8. Vacuum Solder Extractor

No static charge retention.

Unsoldering components.

Pace Model PC-10.

9. Lubricant

No-Noise.

Switch lubrication.

Tektronix Part Number 006-0442-02.

10. Pin-replacement Kit

Replace circuit board connector pins.

Tektronix Part Number 040-0542-00.

To remove a soldered dual-in-line packaged (DIP) IC, do not heat adjacent conductors consecutively. Apply heat to pins at alternate sides and ends of the IC as solder is removed. Allow a moment for the circuit board to cool before proceeding to the next pin.

The heat-sink-mounted power supply transistors are insulated from the heat sink. In addition, a heat-sink compound is used to increase heat transfer capabilities. Reinstall the insulators and replace the heat-sink compound when replacing these transistors. The compound should be applied to both sides of the insulators and should be applied to the bottom side of the transistor where it comes in contact with the insulator.

NOTE

After replacing a power transistor, check that the collector is not shorted to the heat sink before applying power to the instrument.

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