Yamaha RX-V675 Service Manual page 93

IC79, 81: TC74VHC273FT (EL,K) (DIGITAL (1) P.C.B.)
Octal D-type flip-flop with clear
CLR 1 20 V CC
Q1 2 19
D1 3 18
D2 4 17
5 16
Q2
6 15
Q3
D3 7 14
D4 8 13
9 12
Q4
GND 10 11
Inputs Output
CLR D CK Q
L X X L
H L L
H H H
H X Q n
IC79
Pin R32C external
Function Name
No. bus data
2 D[8] HDMI_PON
5 D[9] HRTX_N_RST
6 D[10] MHLVB_PON
9 D[11] FLD_PON
12 D[12] FLD_N_RST
15 D[13] HTX_AUSEL
16 D[14] HAU_N_OE
19 D[15] STBY_LED
IC81
Pin R32C external
Function Name
No. bus data
2 D[0] HSW_N_RST
5 D[1] VDEC_N_RST
6 D[2] WIFI_PON
9 D[3] ---
12 D[4] FHDMI_N_RST
15 D[5] VID_PON
16 D[6] +3.3D_PON
19 D[7] PRY
Q8
D1
3
1
D8
CLR
D R
D7
Q7
CK Q
Q6
11
CK
D6
D5
2
Q5
Q1
CK
Function
Clear
−
−
No Change
I/O
Related Power Supply
OFF
HDMI_PON O
HDMI_PON O
HDMI_PON O
FLD_PON O
FLD_PON O
HDMI_PON O
HDMI_PON O
AC O
I/O
Related Power Supply
OFF
HDMI_PON O
HDMI_PON O
WIFI_PON O
AC O
HDMI_PON O
VID_PON O
+3.3D_PON O
PRY O
RX-V675/HTR-6066/RX-A730/TSR-6750
D2 D3 D4 D5
4 7 8 13
D R D R D R
CK Q CK Q CK Q
5 6 9
Q2 Q3 Q4
ON
O HDMI power supply (Necessary for DSP, A-VIDEO drive)
O HDMI receiver/transmitter reset
O MHL VBUS power supply control
H: feeding permission, L: feeding prohibition
O FL driver +3.3V power supply control
O FLD reset
O HDMI transmitter sound select
O HDMI to DIR sound output enable
O Standby LED control
ON
O HDMI switcher reset (L period: more than 5ms)
O Video decoder reset
O WiFi adaptor power supply control
O No used
O Front HDMI reset
O Video power supply
O OR of HDMI_PON, DSP_PON, NET_USB_PON
O Power relay
D6 D7 D8
14 17 18
D R D R D R D R
CK Q CK Q CK Q CK Q
12 15 16
Q5 Q6 Q7
Detail of Function
Detail of Function
19
Q8
93