Yamaha RX-V730 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 IC441 is displayed,
using 5V/256 as standard.
When the power is turned on, the speaker impedance
switch setting is automatically detected, using the input
voltage value of pin No. 95 of IC441.
Input voltage value
Impedance switch setting
The port output is controlled by using the input voltage
value of pin No. 95 of IC441.
When higher than VthH, the port output is changed
from L to H.
When lower than VthH, the port output is changed from
H to L.
Markets Impedance
U, C, R, T, K, L 8/6 ohms
4 ohms
A, B, G 8/6 ohms
4 ohms
THM/FAN OUT (temperature detection/fan drive level)
THM: 500% display of the voltage based on the
temperature detected value. Reference voltage :
5V=500% (Normal value: U, C models ..... 30 to
173,
Others models ..... 30 to 163)
Fan: Current fan drive level on the left and the past fan
drive history on the right.
FAN DRIVE TEST (For models so equipped)
For models equipped with a fan
HIGH
FAN DRIVE TEST (For models so equipped)
For models equipped with a fan
MID
FAN DRIVE TEST (For models so equipped)
For models equipped with a fan
LOW
0 - 460mV 461mV - 5V
4 ohms 8 ohms
PORT VthL VthH
No.10 3.00V 3.50V
No.11 2.28V 2.78V
No.10 3.07V 3.57V
No.11 2.35V 2.85V
Display
fan drive level HIGH
RX-V730/RX-V730RDS/RX-V630/RX-V630RDS
HTR-5560/HTR-5560RDS/DSP-AX630/DSP-AX630SE
PORT VthL
No.10 2.80V
H M L
MID LOW
VthH
3.30V
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