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| Switch Position | Tester Connection | Measurement Value |
| "MODE" switch pushed | 1 - 2 | Approximately 270 Ω |
| "CH UP" switch pushed | Approximately 740 Ω | |
| "CH DOWN" switch pushed | Approximately 1.3 kΩ | |
| "VOL UP" switch pushed | Approximately 2.1 kΩ | |
| "VOL DOWN" switch pushed | Approximately 3.1 kΩ |