Yamaha RX-V675 Service Manual page 65

P1-3. THM
Temperature of the heatsink (THM) is detected.
The voltage at 12 pin (THM1) of IC78/1 pin (THM2) of IC76 are displayed.
Normal value
THM1: 42 to 255
THM2: 42 to 255 (U, C models)
(Reference voltage: 3.3 V=255)
* If THM1 or THM2 becomes out of the normal value range, the protection function works to turn off the power.
P1-4. INVALID ITEM
Not for service.
P1-5. OUTPUT LEVEL
Output level of speaker output is detected.
The voltage at 4 pin (AMP_OLV) of IC78 is displayed.
(Reference voltage: 3.3 V=255)
P1-6. LIMITER CONTROL
Power limiter control is detected.
The voltage at 4 pin (AMP_LMT) of IC83 is displayed.
(Reference voltage: 3.3 V=255)
P1-7. L3 (J model)
Not for service.
P 1 - 3
T M a : 1 1 2 / 1 0 5
THM2
THM1
P 1 - 4
I N V A L I D I T E M
P 1 - 5
O U T L V L : 2 5 5
P 1 - 6
L M T C N T : 2 5 5
P 1 - 7
L 3 : 0
RX-V675/HTR-6066/RX-A730/TSR-6750
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