Pioneer VSX-523-K Service Manual page 25

5
No. Symbol I/O
51 C_RLY O
52 NC
53 SP_DC O
54 NET_PWR O
55 H+1.8V_ON O
56 D+3.3V_ON O
57 MIC_DET O
58 4588_PDN O
59 4588_SDA I/O
60 4588_SCL O
61 DSP_SIMO O
62 3V3
63 DSP_SPICLK O
64 GND
65 DSP_RST O
66 NC
67 DSP_SOMI
68 DSP_CS O
69 DSP_ENABLE
70 HDMI_SEL O
71 PROTECT2
72 H+3.3V_FET_ON O
73 SUB_ON O
74 SUB_IRQ
75 HDMI_MUTE
76 USB5V_ON O
77 SUB_RST O
78 USB5V_DET O
79 SCDO_MAIN O
80 CSCK_MAIN O
81 SET OPTION
82 STEP OPTION
83 VIDEO_MUTE O
84 OSD/FLT_DATA O
85 PROTECT1
86 VOL_DN
87 VOL_UP
88 IN_UP
89 NC
90 KEY1
91 KEY3
92 KEY2
93 IN_DN
94 FLT_CE O
95 NC
96 GND
97 USBDCERR O
98 3V3
99 3V3
100 V+5V_DET
5
6
Tr driven control pins at the Center speaker output Relay (active at H)
Not used
HDMI LED on/off control pin if Speaker DC Protection
Control pin HDMI IC +5 V REG. IC (on: H)
Control pin HDMI IC +1.8 V REG. IC (on: H)
Control pin digital +3.3V DC/DC IC (on: H)
Monitoring the input pin microphone connection (detection: L)
Output for AK4588 power down
Data signal output for AK4588 (I2C)
Clock signal output for AK4588 (I2C)
Data signal Input for DA808
+3.3 V Power Supply
Clock signal output for DA808 (SPI)
Ground
Output to reset DA808
Not used
I Data signal output for DA808 (SPI)
Chip select signal output for DA808
I SPI Enable signal input from DA808
IC signal of the control pins at select HDMI or analog audio
I AMP Assy input signal of the RADIATOR THERMAL pin (L = PROTECTION)
Control pin HDMI IC +3.3 V REG. IC (on: H)
Control pin sub CPU IC +3.3 V REG. IC (on: H)
I Interrupt signal output pin to main CPU
I Input for HDMI_RX_MUTE condition
Output for NCP380 Enable Input
Output to reset sub CPU
USB+5 Voltage monitor input pin overcurrent protection
Data signal output to sub CPU
Clock signal output for sub CPU
I Input for Set option
I Input for Step (Group) option
Ouput for Video IC MUTE condition
OSD or FLT Data pin
I AMP Assy Protection detection signal input pin (ASO = 0.82 V, DC = 1.39 V)
I Data input for VOLUME encoder (VOLUME DOWN is counterclockwise direction)
I Data input for VOLUME encoder (VOLUME UP is clockwise direction)
I Data input for INPUT selector encoder
Not used
I Data input for Key1 scan
I Data input for Key3 scan
I Data input for Key2 scan
I Data input for INPUT selector encoder
Output for chip enable of SC16315
Not used
Ground
Not used
+3.3 V Power Supply
+3.3 V Power Supply
I Detection pin V+5V protection
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7
Description
VSX-523-K
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8
A
B
C
D
E
F
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