Kenwood KRF-X7775D Service Manual page 10

KRF-X7775D/X7775D-S/VR-5080/5090
7. Description of the Circuit Control
7-1 Fan Control (X13,IC3)
Fan
FAN STOP
FAN LOW SPEED
FAN HI SPEED
FAN LOW SPEED
FAN HI SPEED
7-2 Door Open/Close Control : FL Driver(X25,IC1)
KRF-X9995D/VR-5900 only
DOOR OUT1(42Pin) DOOR OUT2(41Pin)
OPEN
CLOSE
STOP
BREAK
7-3 Open Close Sensor(X13,IC3 : Main u-com)
KRF-X9995D/VR-5900 only
END OF OPEN ACTION
END OF CLOSE ACTION
7-4 Relay Control : X13,IC3(Main u-com)
SELECTOR
PHONO
TUNER
CD1
MD/TAPE1
CD-R
CD2/TAPE2 MONITOR
VIDEO1
VIDEO2
VIDEO3
VIDEO4
DVD
AV/AUX
8. Sub microcomputer: uPD784224K507(X08, IC43)
8-1 Sub microcomputerperiphery block diagram
10
CIRCUIT DESCRIPTION
10W(91Pin) 1W(92Pin)
H H
H L
L L
H H
H L
L L
1 0
0 1
0 0
1 1
OPEN CLOSE
SENS(59Pin) SENS(58Pin)
0 1
1 0
RELAY CONT.(63Pin)
0
1
X13, IC3
Main u -Com
X25,IC11
X08, IC5
Digital
Selector
X13
Video
Selector
IC502,504,505
IC603,604
IC701~703
X08, IC31
THERMAL SW(55Pin) FAN ON/OFF(90Pin)
L
L
L
H
H
H
7-5 IR Remote Control
WITH RF RF ON
VERSION RF OFF
FRONT
WITHOUT
RF VERSION FRONT
IR OFF
7-6 P Macro Video Switch(X13,IC505)
SELECTOR
VIDEO1
VIDEO2
VIDEO3
VIDEO4
DVD
7-7 Video/TV Detection : X13,IC3
Video Detection
Video Signal
Yes
No
TV Detection
TV POWER
ON
OFF
X08, IC43
Sub Microcomputer
D S P
FAN H/L(89Pin)
0
1
1
1
1
1
X25,IC401 X25,IC401 IR SELECT
RF IN IR IN
(7Pin) (6Pin)
X O
O X
X O
IR ON
O X
P MACRO P Macro
A(3Pin) B(4Pin)
0 0
0 1
1 0
1 1
0 0
P Macro IN(62Pin)
H
L
TV SENS.(34Pin)
H
L
X08, IC7
A/D
X08, IC11,14
IC17, 20
D/A
X08, IC6
DIR
1
1
0
1
1
0
X13,IC3
(93Pin)
0
1
0
1
P Macro
C(5Pin)
0
0
0
0
1