Kenwood KRF-X7775D - Page 9

KRF-X7775D/X7775D-S/VR-5080/5090
9
CIRCUIT DESCRIPTION
Port No. Port Name I/O Function
51 VDD - +5V power supply
52 AVREF - Reference voltage input.
53 MODEL SEL I Discrimination port for model type.
54 DSW0 I Detection port for tuner destination SW 0.
55 THERM SW I Detection port for thermal switch. (Refer to 7-1)
56 S LEVEL I RDS signal level input. (E/T type only)
57 RDS DATA I Data input of RDS demodulator IC. (E/T type only)
58 CLOSE SENS I
Detection port of close sensor for panel door. (Refer to 7-3)
(KRF-X9995D/VR-5900 only)
59 OPEN SENS I
Detection port of open sensor for panel door. (Refer to 7-3)
(KRF-X9995D/VR5900 only)
60 INPUT DOWN KEY IN I Detection port of input down key.
61 AVSS - Connected to GND.
62 P MACRO IN I Input port of perfect macro. (Refer to 7-7)
63 RELAY CONT O Relay control output. (Refer to 7-4)
64 AVREF1 - Reference voltage input.
65 1394/TEXT RX I CD TEXT UTRA communication data input.
66 1394/TEXT TX O CD TEXT UTRA communication data output.
67 SUB RESET O Reset signal output to sub microcomputer.
68 RS RX1 I RS232C communication data input 1. (Except KRF-X7775D)
69 RS TX1 O RS232C communication data output 1. (Ditto)
70 RS RX2 I RS232C communication data input 2. (Ditto)
71 RS TX2 O RS232C communication data output 2. (Ditto)
72 LED O Control port for pro logic2 led.
73 SDT I Communication data input from sub microcomputer.
74 MDT O Communication data output to sub microcomputer.
75 MCK O Clock output to sub microcomputer.
76 MREQ O Communication master request.
77 SREQ I Communication slabe request.
78 F/CSW MUTE O Mute control port for room A.
79 PRE S/B MUTE O Mute control port for pre out surround.
80 SP S/B MUTE O Mute control port for S/B speakers.
81 PRE ZB MUTE O Mute control port for pre out B (zone B).
82 V/RECMUTE O Mute control port for video rec out.
83 10dB GAIN O Switching port for +10dB amplifier.
84 RELAY CS O Mute control port for center/surround speakers.
85 RELAY B O Relay control port for speaker B.
86 RELAY A O Relay control port for speaker A.
87 RELAY TR O Switching port for transformer tap.
88 POWER O Power relay control port.
89 FAN H/L O Control port for fan motor (H/L).
90 FAN ON/OFF O Control port for fan motor (on/off).
91 10W I 10W detection port for fan control.
92 1W I 1W detection port for fan control.
93 IR SELECT O RF/IR IN switch control. (Refer to 7-5), KRF-X9995D/VR-5900 only
94 V PROT I Detection port of protection signal.
95 I PROT I Detection port of protection signal.
96 STBY LED O Control port for standby led.
97 REM RWR I RWR from LCD remote controller.
98 REM ENB I Chip enable from LCD remote controller.
99 REM REQ O Request to LCD remote controller.
100 VSS - GND
✽ Refer to 7-1
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