Circuit Description - Kenwood DV-K750 Service Manual

DV-K750/S700
1. DV-K750 is constructed by DV-S700 and
Karaoke function.
When the port #34 of the microprocessor will be
connected to High level, specifications is the DV-S700. To
be connected to Low level will be the DV-K750.
2. DVD disc will have the region code in it.
(Refer to page 15.)
3. Initialization of unit
a) POWER :
b) 2-CHANNEL :
c) KARAOKE :
d) MIC-1 VOLUME :
e) MIC-2 VOLUME :
f) MIC ECHO :
g) KEY CONTROL :
4. Main microprocessor : HE643339A48F.
4-1 Block diagram
(X25) ED1
FL DISPLAY
(X25) IC
VFD Display
LC75710N
(X25) IC301
ON SCREEN DISPLAY
MB90089FP-188
(X25) IC604
CD TEXT DECODER
LC89170M
(W02) IC6031
MECHA MAIN u-COM
MN1020819N2C
(X05) A601
REMOTE SENSOR
KEY BOARD
REGION CODE/MODEL
OUTPUT
12

CIRCUIT DESCRIPTION

STANDBY
OFF
OFF
6
6
8
±0
(X25) IC603
VFD DOT DRIVER
CE
DI
CL
CS
SIN
SCLK
(X25)
IC602
SCLK
SCLK1
SRDT
RxD1
DQST
IRQ2
DV-S700 /
DV-K750
DSPSCLK
SCK0
CMD
TxD0
STATUS
RxD0
READY
IRQ1
2
2
h) MEMORY :
I) PROGRAM PLAY :
j) REPEAT :
k) VISUAL and AUDIO LIMIT :
l) PASS WORD of
VISUAL and AUDIO
LIMIT (DVD) :
m) AUDIO OUTPUT (DVD) :
n) CAPTION (DVD) :
o) DISC MENU (DVD ) :
p) TV SCREEN (DVD) :
q) OSD display :
r) CENTER CHANNEL :
s) SUB-WOOFER CHANNEL :
t) SURROUND CHANNEL :
non backup
4 ANALOG MUTE
3 SUBW, AC-3, KARAOKE
DVD LED
POWER
2
2
RD, WR
D0~D7
Address
A0~A15
BANK
MAIN u-COM
2
HD6433397A48F
IFL
STB
NON FIX
NON FIX
NORMAL PLAY
LEVEL 8 (NON LIMIT)
NON LIMIT
ORIGINAL
AUTOMATIC
ENGLISH
LETTER BOX
ON
ON
ON
ON
OTHER CIRCUIT
(X25) J1
BUSY, DATA
SYSYTEM CONTROL
(X25) IC605
READ / WRITE
SRAM
AS
DATA
HM62256BLFP-8T
8
16
3
(X25) IC19
IFS, IFD KARAOKE
TC9409BF
(X25) IC21
CK, DATA
ELECTRIC VOL.
TC9210P
(X25) S613
2
SHUTTLE SW(JOG DIAL)