Kenwood KRF-V7773D Service Manual page 7

Audio video surround receiver
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4-2 Pin Description of Main Microprocessor
Pin No.
Pin Name
I/O
1-8
REM_D0-D7
O
LCD ROMOTE DATA OUT (0-7)
9
VDD
-
+5V POWER SUPPLY
10
VOL_DATA
O
VOLUME IC DATA OUT
11
VOL_CLK
O
VOLUME IC CLOCK
12
VOL_STB
O
VOLUME IC STROBE
13
TONE_STB
O
TONE IC STROBE
14
VOL/TONE/SEL_DATA
O
TONE/SELECTOR IC DATA OUT
15
VOL/TONE/SEL_CLK
O
TONE/SELECTOR IC CLOCK
16-18
SEL_STB1-3
O
SELECTOR IC STROBE1-3
19
MODEL1
I
DISCRIMINATION SW1 FOR MODEL
20
MODEL2
I
DISCRIMINATION SW2 FOR MODEL
21
RF_PLL_CE
O
PLL(V2105V)CE FOR RF REMOTE CONTROL
22
VPP TEST
-
CONNECTED TO GND
23
STEREO
I
PLL(LC72131) STEREO
24
SD
I
PLL(LC72131) SD
25
[RF] PLL_CLK
O
PLL(LC72131) CLOCK RF REMOTE CONTROL(V2105V) CLOCK
26
[RF] PLL_DATA
O
PLL(LC72131) DATA RF REMOTE CONTROL PLL(V2105V) DATA
27
PLL_DO
I
PLL(LC72131) DO
28
PLL_CE
O
PLL(LC72131) CE
29
T_MUTE
O
TUNER MUTE
30
RELAY_CONT
O
RELAY CONTROL OUTPUT(REFER TO 5. SW CONTROL)
31-33
P_MACRO_A-C
O
PERFECT MACRO (A-C)
34
TV_SENS
I
TV SIGNAL DETECTION
35
ENC_A
I
VOLUME ENCODER INPUT A
36
ENC_B
I
VOLUME ENCODER INPUT B
37
VDD
-
+5V POWER SUPPLY
38
X2
O
12.5MHz OSCILLATOR
39
X1
I
12.5MHz OSCILLATOR
40
VSS
-
GND
41
XT2
-
UNUSED
42
XT1
-
CONNECTED TO GND
43
RESET
I
MAIN u-COM RESET
44
CE
I
CHIP ENABLE
45
DSW1
I
TUNER DESTINATION SW1
46
DSW2
I
TUNER DESTINATION SW2
47
POWER_KEY_IN
I
POWER KEY INPUT
48
RDS_CLOCK
I
RDS SYNCHRONIZED CLOCK
49
REM1
I
REMOTE CONTROL SIGNAL INPUT1 (FRONT PANEL)
50
REM2
I
REMOTE CONTROL SIGNAL INPUT (IR RECEIVER)
51
AVDD
-
+5V POWER SUPPLY
52
AVREF
-
+5V POWER SUPPLY
53
CLOSE_SENS
I
CLOSE SENSOR(PANEL DOOR)
54
OPEN_SENS
I
OPEN SENSOR(PANEL DOOR)
55
P_MACRO_IN
I
PERFECT MACRO INPUT
56
THERM_SW
I
THERMAL SW CHANGEOVER
57
S_LEVEL
I
RDS SIGNAL LEVEL INPUT
58
RDS_DATA
I
RDS SYNCHRONIZED DATA
59
DSW0
I
TUNER DESTINATION SW0
60
INPUT_DOWN_KEY_IN
I
INPUT DOWN KEY INPUT
61
AVSS
-
CONNECTED TO GND
62
S_DATA
I/O
SL16 DATA
63
S BUSY
I/O
SL16 BUSY
64
AVREF
-
+5V POWER SUPPLY
65
TEXT_RX
I
CD TEXT UART COMMUNICATION DATA IN
Pin No.
Description
5. Switch Control
5-1 Fan Control (X13, IC23)
FAN LOW SPEED
FAN LOW SPEED
5-2 Door Open/Close Control : FL Driver(X25,IC1)
CLOSE
BREAK
Pin Name
I/O
66
TEXT_TX
O
CD TEXT UART COMMUNICATION DATA OUT
67
SUB RESET
O
SUB u-COM RESET PORT
68
FL_DIN
I
FL DRIVER (uPD780204) DATA IN
69
FL_DOUT
O
FL DRIVER (uPD780204) DATA OUT
70
FL_CLK
O
FL DRIVER (uPD780204) CLOCK
71
FL_RST
O
FL DRIVER (uPD780204) RESET
72
FL_STB
O
FL DRIVER (uPD780204) STROBE
73
SDT
I
DATA COMMUNICATION BETWEEN MAIN & SUB u-COM
74
MDT
O
DATA COMMUNICATION BETWEEN MAIN & SUB u-COM
75
MCK
O
SUB u-COM CLOCK OUTPUT
76
MREQ
O
COMMUNICATION MASTER REQUEST BETWEEN MAIN & SUB u-COM
77
SREQ
I
COMMUNICATION SLAVE REQUEST BETWEEN MAIN & SUB u-COM
78
10dB CTL
O
-10dB AMP CHANGEOVER (AMP ON:H)
79
SW MUTE
O
SPEAKER S/W MUTE
80
MUTE
O
PREOUT SURROUND MUTE
81
B_MUTE
O
PREOUT B MUTE(ROOM B)
82
A_MUTE
O
ROOM A MUTE
83
DSW3
I
TUNER DESTINATION SW3
84
RELAY_CS
O
CENTER/SURROUND SP. RELAY CONTROL
85
RELAY_B
O
SP.B RELAY CONTROL
86
RELAY_A
O
SP.A RELAY CONTROL
87
RELAY_TR
O
TRANSFORMER TAP CHANGEOVER
88
POWER
O
POWER RELAY CONTROL
89
FAN_H/L
O
FAN MOTOR (H/L) CONTROL
90
FAN_ON/OFF
O
FAN MOTOR (ON/OFF)CONTROL
91
10W
I
10W DETECTION PORT
92
1W
I
1W DETECTION PORT
93
IR SELECT
O
IR REMOTE CONTROL SENSOR CONTROL
94
V_PROT
I
VOLTAGE DETECTION FOR PROTECTION
95
I_PROT
I
CURRENT DETECTION FOR PROTECTION
96
STBY_LED
O
STANDBY LED CONTROL
97
REM_RWR
I
LCD REMOTE RWR
98
REM_ENB
I
LCD REMOTE ENABLE
99
REM_REQ
O
LCD REMOTE REQUEST
100
VSS
-
CONNECTED TO GND
10W(91Pin)
1W(92Pin)
THERM SW(56Pin)
FAN STOP
H
H
H
L
FAN HI SPEED
L
L
H
H
H
L
FAN HI SPEED
L
L
DOOR OUT1(42Pin)
DOOR OUT2(41Pin)
OPEN
1
0
0
1
STOP
0
0
1
1
Description
FAN ON/OFF(90Pin)
FAN H/L(89Pin)
L
0
1
L
1
1
L
1
0
H
1
1
H
1
1
H
1
0
5-3 Open Close Sensor (X13,IC23 Main u-COM)
OPEN
CLOSE
SENS(54)
SENS(53)
END OF OPEN ACTION
0
1
END OF CLOSE ACTION
1
0

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