Kenwood KRF-X7775D Service Manual page 9

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