Yamaha YHT-196 Service Manual
Also see for HTR-2064: Owner's manual
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9-2. TH1/TH2Temperature of the heatsink is detected.Detection port: 89 pin (THM1)90 pin (THM2) (U, C models)Normal value: 87 to 255(Reference voltage: 3.3 V=255)* If TH1 or TH2 becomes out of the normal value range, the protection function works to turn off the power.9-3. TH3Temperature of the bridge diode (D24 on MAIN P.C.B.) is detected.Detection port: 63 pin (THM3)Normal value: 88 to 255(Reference voltage: 3.3 V=255)* If TH3 becomes out of the normal value range, the protection function works to turn off the power.9-4. AMP/DKAMP: Power amplifier output level is detected.Detection port: 88 pin (AMP_OLV)Normal value: 128 to 255(Reference voltage: 3.3 V=255)DK: Not for service.38HTR-2064/NS-B20/NS-C20/NS-SWP20HTR-2064/NS-B20/NS-C20/NS-SWP20 |
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