Yamaha HTR-5635 Service Manual page 23

IMP SW/POWER LIMIT (Impedance/power limiter
detection)
IMP: 8 or 4 ohm impedance switch setting
PL: Power limiter detection value
The voltage value of pin No. 95 of IC301 is displayed,
using 5V/256 as standard.
When the power is turned on, the impedance of the
speaker being connected is automatically detected,
using the input voltage value of pin No. 95 of IC301.
Input voltage value
Impedance of speaker
The port output is controlled by using the input voltage
value of pin No. 95 of IC301.
When higher than VthH, the port output is changed
from L to H.
When lower than VthL, the port output is changed from
H to L.
Impedance PORT VthL
8/6 ohms No.10 2.85V
4 ohms No.11 1.88V
THM/FAN OUT (temperature detection/fan drive level)
THM: 500% display of the voltage based on the
temperature detected value. Reference voltage :
5V (Normal value: U, C models ..... 30 to 173)
Fan: Current fan drive level on the left and the past fan
drive history on the right.
(Not applied to HTR-5635)
0 - 460mV 461mV - 5V
4 ohms 8 ohms
VthH
3.30V
2.38V
11. IF STATUS (Input function status)
Using the sub-menu, the status data is displayed one after
another in the hexadecimal notation.
During signal processing, the status before execution of
this menu is maintained.
* Numeric values in the figure example are for reference.
IS1-3 (Internal status):
Indicates the status information of the microprocessor.
5th byte
4th byte
3rd byte
2nd byte
1st byte
<1st byte> Digital input/output setting value
Upper 4 bits: REC OUT selected /
lower 4 bits: INPUT selected
Value Choice
0 NONE
1 OPTA
2 OPTB
3 OPTC
4 OPTD
8 COAXA
HTR-5635
Preset name
DVD
CD
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