Yamaha RX-V375U, Service Manual

Page: 71 / 138

Pin
No.
Port Name
Function Name
(P.C.B.)
I/O
Detail of Function
P
o
w
er of
f
MCU sleep A
C
of
f
115 P11_4 CPNT_N_PS O O O Component video selector IC power save
116 P11_3 VO_N_MT O O O Composite video selector mute
117 P11_2 VSEL3 O O O Video input select
118 P11_1 VSEL2 O O O Video input select
119 P11_0 VSEL1 O O O Video input select
120 AN7 DC_PRT I I I Power amp DC detection
121 AN6 AMP_OLV I I I Power amp output level detection
122 AN5 THM1 I I I Temperature detection 1
123 AN4 THM2 I I I Temperature detection 2
124 AN3 KEY2 I I I KEY AD value uptake 2
125 AN2 KEY1 I I I KEY AD value uptake 1
126 AN1 PS_PRT I I I PS protection detection
127 AVSS AVSS MCU MCU MCU Microprocessor ground
128 P10_0 (no use) O O O AD spare
Key detection for A/D port
Key input (A/D) pull-up resistance 10 k-ohms
0 Ω + 1.0 kΩ + 1.0 kΩ + 1.5 kΩ + 1.5 kΩ + 2.2 kΩ + 3.3 kΩ + 4.7 kΩ (22 kΩ + 33 kΩ) + 22 kΩ + 33 kΩ
Detected voltage value
at 124 pin
0 – 0.15 V 0.15 – 0.42 V 0.43 – 0.70 V 0.71 – 0.97 V 0.98 – 1.24 V 1.25 – 1.53 V 1.54 – 1.84 V 1.84 – 2.10 V 2.11 – 2.33 V 2.34 – 2.54 V 2.55 – 2.97 V
A/D value
(3.3 V=255)
0 – 11 12 – 32 33 – 54 55 – 75 76 – 96 97 – 119 120 – 142 143 – 163 164 – 181 182 – 197 198 – 229
KEY2
RADIO
(SCENE4)
CD
(SCENE3)
TV
(SCENE2)
BD/DVD
(SCENE1)
PROGRAM
>
PROGRAM
<
INPUT
>
INPUT
<
–
(Power)
TONE
CONTROL
0 Ω + 1.0 kΩ + 1.5 kΩ + 1.8 kΩ + 2.2 kΩ + 3.3 kΩ + 4.7 kΩ + 8.2 kΩ + 10 kΩ
Detected voltage value
at 125 pin
0 – 0.15 V 0.15 – 0.48 V 0.49 – 0.82 V 0.83 – 1.14 V 1.15 – 1.46 V 1.47 – 1.79 V 1.80 – 2.12 V 2.13 – 2.40 V 2.41 – 2.91 V
A/D value
(3.3 V=255)
0 – 11 12 – 37 38 – 64 65 – 88 89 – 113 114 – 139 140 – 164 165 – 186 187 – 226
KEY1 STRAIGHT
TUNING
>>
TUNING
<<
AM FM
PRESET
>
PRESET
<
MEMORY INFO
71
RX-V375/HTR-3066/HTR-2866
RX-V375/HTR-3066/
HTR-2866