Circuit Description - Kenwood KRF-V7020D Service Manual

1. The back up item and initialization
condition
1-1 Back up
• POWER
• VOLUME LEVEL
• AUDIO INPUT SELECTOR
• VIDEO INPUT SELECTOR
• SPEAKER A
• SPEAKER B
• BASS
• TREBLE
• INPUT LEVEL
• SOURCE DIRECT
• MONITOR
• DIMMER
• LISTEN MODE
• VIRTUAL SURROUND
• INPUT MODE
• SUB WOOFER
• FRONT SP. SIZE
• CENTER SP. SIZE
• SURROUND SP. SIZE
• DISTANCE
2. Condition by the destination or model
Reception
TYPE BAND
frequency
FM 87.5MHz~108.0MHz
K1
1700
AM 530kHz~1700kHz
FM 87.5MHz~108.0MHz
K2
1610
AM 530kHz~1610kHz
FM 87.5MHz~108.0MHz
K4
1700 RBDS
AM 530kHz~1700kHz
FM 87.5MHz~108.0MHz
E1
AM 531kHz~1602kHz
FM 87.5MHz~108.0MHz
E3
AM 531kHz~1602kHz
RDS
FM L 65.0MHz~74.0MHz
Q1
FM H 87.5MHz~108.0MHz
RDS
AM 531kHz~1602kHz
K2/E1 is switched with only the setting of DSW1 (X11 : S601).
M
(DSW1 = 0 : K2 type, 1 : E1 type)
3. TEST MODE
[setting method]
While pressing INPUT SELECTOR key, plug the AC
power cord into an AC outlet (K, P type) or turn on the
AC POWER switch. When a set is set up in test mode
condition a set becomes the following condition. Auto-
matic POWER ON. All indicator tube (FL) and CLIP INDI-
CATOR LED are lighted. The other LED are flashed.

CIRCUIT DESCRIPTION

: POWER OFF
: -66dB
: TUNER
: VIDEO 1
: ON
: OFF
: 0dB
: 0dB
: 0dB
: OFF
: OFF
: DIMMER 1 (LIGHTEST)
: STEREO
: OFF
: DIGITAL AUTO
: YES(ON)
: NORMAL
: NORMAL
: NORMAL
: Fch 10ft/3m
: Cch 10ft/3m
: Sch 10ft/3m
Channel
IF
space
100kHz +10.7MHz
10kHz +450kHz
100kHz +10.7MHz
10kHz +450kHz
100kHz +10.7MHz
10kHz +450kHz
50kHz +10.7MHz
9kHz +450kHz
50kHz +10.7MHz
9kHz +450kHz
10kHz +10.7MHz
50kHz +10.7MHz
9kHz +450kHz
KRF-V7020D/V8020D/VR-307/309/357
• FRONT (L,R) LEVEL
• CENTER LEVEL
• REAR (LS,RS) LEVEL
• SUB WOOER LEVEL
• MIDNIGHT
• BAND
• FM FREQUENCY
• AM FREQUENCY
• PRESET CH.
• PRESET MEMORY FREQUENCY
• TUNING MODE
1-2 The initial setting
While pressing POWER key, plug the AC power cord into
an AC outlet (K,P type) or turn on the AC POWER
switch.
PLL standard
frequency
DSW3
77
25kHz
0
10kHz
25kHz
0
10kHz
25kHz
1
10kHz
25kHz
0
9kHz
25kHz
0
9kHz
5kHz
5kHz
1
9kHz
0
A backup at the thing except ON/OFF of POWER is ini-
tialized.
[cancel method]
The power supply is turned off.
: 0dB
: 0dB
: 0dB
: 0dB
: OFF
: FM
: 87.50MHz
: 531kHz(CH.SPACE 9kHz)
: 530kHz(CH.SPACE 10kHz)
: [ --ch ]
: PRESET MEMORY
FREQUENCY
: AUTO
(0 : Pull down, 1 : Pull up)
Diode sw
DSW2 DSW1 DSW0
76 75 74
0 0 0
0 0 1
0 1 0
0 1 1
1 0 1
0 1 1
0 X 1
7