Yamaha NS-BP300 Service Manual page 32

R-840/NS-BP300
4-4. THM
Temperature detection
Temperature of the heatsink is detected by IC501 of the MAIN P.C.B..
Normal value:
* If THM becomes out of the normal value range, the protection function works to turn off the power.
4-5. VOLUME
VOLUME knob position detection
The voltage at 97 pin (I-VOL) of microprocessor IC101 is displayed.
Normal value:
4-6. BASS
BASS knob position detection
The voltage at 94 pin (I-BAS) of microprocessor IC101 is displayed.
Normal value:
4-7. TBL
TREBLE knob position detection
The voltage at 95 pin (I-TRE) of microprocessor IC101 is displayed.
Normal value:
4-8. BAL
BALANCE knob position detection
The voltage at 93 pin (I-LRBAL) of microprocessor IC101 is displayed.
Normal value:
4-9. CNT
Center position detection of BASS, TREBLE and BALANCE knobs
Normal value:
32
41 to 317
(Reference voltage: 5.0 V = 1023)
4 4 . T H M : 0 1 8 6
0 (MIN) to 1010 or more (MAX)
(Reference voltage: 5.0 V = 1023)
4 5 . V O L : 0 0 0 0
0 (-) to 1010 or more (+)
(Reference voltage: 5.0 V = 1023)
4 6 . B A S : 0 5 0 2
0 (-) to 1010 or more (+)
(Reference voltage: 5.0 V = 1023)
4 7 . T B L : 0 5 0 2
0 (L) to 1010 or more (R)
(Reference voltage: 5.0 V = 1023)
4 8 . B A L : 0 5 0 2
470 to 552
(Reference voltage: 5.0 V = 1023)
4 9 . C N T : 0 5 0 2