Circuit Description - Kenwood VR-505 Service Manual

1. Initial and Backup Function
1-1 Initial State
Below are set value if the microcomputer is initialized
when reset:
(1) AMP function initialization
• POWER
• Input Selector
• Preset device
• Visual output
• Speaker A relay
• Speaker B relay
• Volume
• BASS
• TREBLE
• INPUT LEVEL
• SOURCE DIRECT
• MONITOR
• VIDEO2/MONITOR
• MD/TAPE
• RF BAND
(2) SURROUND function initialization
• LISTEN MODE
• INPUT MODE
CD/DVD
VIDEO2
VIDEO3
DVD/6ch
• SUBWOOFER
2. Destination List of Tuner
RECEIVING
SET TYPE
TYPE
BAND
FREQUENCY RANGE
K1 FM 87.5MHz-108.0MHz
K, P, R
1700 AM 530kHz-1700kHz
Y, M, I, K2 FM 87.5MHz-108.0MHz
C, V 1610
AM 530kHz-1610kHz
K3
FM 87.5MHz-108.0MHz
1610
Y
RBDS AM 530kHz-1610kHz
K4
FM 87.5MHz-108.0MHz
K, P 1700
AM 530kHz-1700kHz
RBDS
Y, M, I,
FM 87.5MHz-108.0MHz
C, V,
E1
AM 531kHz-1602kHz
E, X, H
FM 87.5MHz-108.0MHz
E2
T MW 531kHz-1602kHz
LW
LW 153kHz-279kHz
E3 FM 87.5MHz-108.0MHz
E, T
RDS
AM 531kHz-1602kHz
E4 FM 87.5MHz-108.0MHz
T LW MW 531kHz-1602kHz
RDS
LW 153kHz-279kHz
FM L 65.0MHz-74.0MHz
Q1
Q
FM H 87.5MHz-108.0MHz
RDS
AM 531kHz-1602kHz
FM L 65.0MHz-74.0MHz
Q2 FM H 87.5MHz-108.0MHz
Q
RDS
MW 531kHz-1602kHz
LW 153kHz-279kHz
Y, M, I, K2/E1 are decided by Tuner Destination Port 1 input.
M
C, V
Y K3/E1 are decided by Tuner Destination Port 0 input.
Y
RBDS

CIRCUIT DESCRIPTION

POWER OFF (STANDBY)
TUNER
None
VIDEO1
ON
OFF
-66dB
0dB
0dB
0dB
0dB
0dB
VIDEO2
TAPE
BAND 1
STEREO
DIGITAL AUTO
ANALOG
ANALOG
DIGITAL AUTO
ON
CHANNEL
IF PLL
SPACE
100kHz +10.7MHz 25kHz
10kHz +450kHz 10kHz
100kHz +10.7MHz 25kHz
10kHz +450kHz 10kHz
100kHz +10.7MHz 25kHz
10kHz +450kHz 10kHz
100kHz +10.7MHz 25kHz
10kHz +450kHz 10kHz
50kHz +10.7MHz 25kHz
9kHz +450kHz 9kHz
50kHz +10.7MHz 25kHz
9kHz +450kHz 9kHz
9kHz +450kHz 9kHz
50kHz +10.7MHz 25kHz
9kHz +450kHz 9kHz
50kHz +10.7MHz 25kHz
9kHz +450kHz 9kHz
9kHz +450kHz 9kHz
10kHz +10.7MHz 5kHz
50kHz +10.7MHz 5kHz
9kHz +450kHz 9kHz
10kHz +10.7MHz 5kHz
50kHz +10.7MHz 5kHz
9kHz +450kHz 9kHz
9kHz +450kHz 9kHz
(0=K2 type 1=E1 type)
(0=K3 type 1=E1 type)
VR-505/506/507/509/510/517
• FRONT speaker size
• CENTER speaker size
• SURROUND speaker size
• DISTANCE
Cch
Sch
• LEFT level
• RIGHT level
• CENTER level
• REAR (SL,SR) level
• SUBWOOFER level
• MIDNIGHT
• CINEMA EQ
(3) TUNER function initialization
• BAND
• PRESET CHANNEL
• Frequency receive
K1/K2
E1
• AUTO MANUAL
1-2 Backup Function
When the AC power supply is turned off, the receiver micro-
computer enters the backup mode. As a result, it will return
to the last state before the AC OFF when the AC power sup-
ply is turned ON again
0 : Pull down,1:Pull up
Tuner Destination Port
PORT3(68PIN) PORT2(67PIN) PORT1(66PIN)
(CP205) (W109) (W105)
0 0 0
0 0 0
0 0 1
1 0 1
0 0 1
0 1 0
0 1 0
0 1 1
1 0 1
1 1 0
0 0 X
0 0 1
LARGE
NORMAL
NORMAL
Fch 3.0m / 10ft
3.0m / 10ft
1.5m / 5ft
0dB
0dB
0dB
0dB
0dB
OFF
OFF
FM
" - - "
Each destination
minimum value
FM : 87.50 MHz
AM : 530 kHz
FM : 87.50 MHz
AM : 531 kHz
AUTO
PORT0(65PIN)
(W106)
0
1
0
0
1
0
1
0
1
0
1
X
3