Imp Sw/Power Limit - Yamaha RX-V750 Service Manual

IMP SW/POWER LIMIT (Impedance/power limiter
detection)
Not applied to these models.
IMP:
PL: Power limiter detection value
The voltage value of pin No. 92 of IC502 is displayed,
using 5V/256 as standard.
The port (No. 3) output is controlled by using the
input voltage value of pin No. 92 of IC502.
K0/K1
This is the A/D value of the panel key input ports KEY0 and
KEY1 (main microprocessors of the main unit). The table
below shows the A/D value obtained when each key is
pressed. When the value is not within the standard value
range, no correct operation is provided. Referring to the table
below, check the value of each voltage dividing resistor of
each key, solder condition, etc.
RX-V750/DSP-AX750/RX-V650 [Table 1]
Display (%) K0
TUNING MODE
PURE DIRECT
INPUT MODE
PRESET w
PRESET q
A/B/C/D/E
TONE CONTROL
STRAIGHT
SPEAKERS B
SPEAKERS A
HTR-5760 [Table 3]
Display (%) K0
TUNING MODE
INPUT MODE
TONE CONTROL
STRAIGHT
SPEAKERS A
SPEAKERS B
–
–
–
–
IMP:8 PL:000
Not applied to these models.
K0:100 K1:100
DSP-AX750SE [Table 2]
Display (%)
K1
MULTI CH INPUT
MEMORY
FM/AM
PRESET/TUNING/EDIT
RDS PTY MODE
RDS PTY START
RDS EON
RDS MODE
–
–
K1
MULTI CH INPUT
MEMORY
PRESET w
PRESET q
A/B/C/D/E
FM/AM
PRESET/TUNING/EDIT
–
–
–
RX-V750/DSP-AX750/DSP-AX750SE
RX-V650/HTR-5760
K0
– MULTI CH INPUT
PURE DIRECT
INPUT MODE
LEVEL +
LEVEL -
NEXT
TONE CONTROL
STRAIGHT
SPEAKERS B
SPEAKERS A
K1
–
–
–
–
–
–
–
–
–
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