Circuit Description - Kenwood KRF-V7030D-S Service Manual

KRF-V7030D/V8030D/VR-407/409
QQ
3 7 63 1515 0
This unit works backup by microprocessor if power is off. The
microprocessor carries out the power-off-checking by 1ms. It
sets up the initialized data if the backup data is destroyed.
Also plug in and out the power cord from the outlet with
pressing the power switch for initialization.
1. Backuped Data
A) Amp
Power on/off
Selector
Device preset
Video output
Speaker A relay on/off
Speaker B relay on/off
Volume level
Bass, Treble level
Input level(every inputs)
Subwoofer yes/no
Dimmer level
2. Condition by the destination or model
TYPE BAND
FM
K1
1700
AM
FM
K2
TE
L 13942296513
1610
AM
FM
E1
AM
FM
E3
RDS AM
K2/E1 is switched with only the setting of DSW1
M
(DSW1 = 0 : K2 type, 1 : E1 type)
3. Main microprocessor: X14,IC1(MN101C35DRA)
3-1 Microprocessor periphery block diagram
X07, IC106, 109/X08,IC12,14
NJU7313AM, NJU7311AM
SEL. DT, SEL. CLK, SEL. ST1,
SEL. ST2
X08, IC51
CS493263 or CS493253
DSP. INTREQ, DSP. CDIN,
DSP. CDOUT, DSP. CCLK,
DSP. CS, DSP. PD
X08, IC2
AK4527
CODEC. CDIN, CODEC. CDOUT,
CODEC. CCLK, CODEC. CS,
CODEC. PD, CODEC. DZF1
X08, IC5
AK4110
DIR. CDIN, DIR. CDOUT, DIR.
CCLK, DIR. PD, DIR. ERR
www
MUTE
/A. MUTE, /PRE. OUT. MUTE
/T. MUTE, /20dB. ATT
.
SERIAL
S. DATA, S. BUSY
X08, IC15
M62446FP
4 VOLDT, VOL. CLK, VOL. ST

CIRCUIT DESCRIPTION

Channel
Reception
space
frequency
87.5MHz~108.0MHz 100kHz
530kHz~1700kHz 10kHz
87.5MHz~108.0MHz 100kHz
530kHz~1610kHz 10kHz
87.5MHz~108.0MHz 50kHz
531kHz~1602kHz 9kHz
87.5MHz~108.0MHz 50kHz
531kHz~1602kHz 9kHz
x ao
y
i
X14, IC4
BU1923F
RDS. CLK, RDS. DATA
8
Monitor no/off
MD/TAPE mode
Video2/Monitor mode
b)Surround function
Listen mode(input:analog/PCM only)
Speaker setup
Distance(how far)
Left, Right, Center level
Surround level
Subwoofer level
Input mode(CD,Video2/3)
Midnight on/off(CD,Video2,3)
C)Tuner
Band
Preset channels
Receiving frequency
Auto/manual
PLL standard
IF
frequency
+10.7MHz 25kHz
+450kHz 10kHz
Q Q
+10.7MHz 25kHz
3 6 7 1 3
+450kHz 10kHz
+10.7MHz 25kHz
+450kHz 9kHz
+10.7MHz 25kHz
+450kHz 9kHz
REMOCON
X14, IC1
MN101C35DRA
X1
OSC
8MHz
u163
.
X07, IC201
TUNER
/SD, /STEREO, CH. SPACE
S. LEVEL
2 9 9 4 2 8
(0 : Pull down, 1 : Pull up)
Diode
DSW3 DSW2 DSW1
0 0 0
1 5 0 5 8 2 9 9 4
0 0 0
0 0 1
0 1 0
0 0 X
X14, ED1
FL
11-MT-120GK
LED
STANDBY. LED, DTS. LED,
DOL. DIG. LED, PROL. LED,
3STEREO. LED,
CS. LED(DOWNMIX. LED)
RELAY
POWER. RLY, SPA. RLY, SPB. RLY
CENTER. RLY, SURR. RLY,
LIMITER, PACK. CONT
ENCODER
VOL. ENC. A, VOL. ENC. B,
m
SEL. ENC. A, SEL. ENC. B
co
A/D KEY
AD. KEY1, AD. KEY2
PROTECTION
THERMAL. SENS, PROTECTION1
PROTECTION2
X07, IC202
LC72131
PLL. DO, PLL. DT, PLL. CK,
PLL. CE
9 9
DSW0
0
2 8 9 9
1
1
1
1