Block Diagram - JVC MX-KB2 Service Manual

Block diagram

Key board section
CD2
S501
SC6122
REMOTE RECEIVER
ENCODE VOLUME
4 5 JOG-A
JOG-B
3 2 1
+9V
U101
TA8189
H CASS A
4CH Pre+Rec
L CASS B
AMP with ALC
BIAS OSC
REC-E
R/P SWITCH CIRCUIT
H-PLAY
L-REC
LOGIC DECK-TP
+9V
IC602
TA2149BFN
IF
IC600
TC9257 PLL
AUX INPUT
2-4
VFD
Filament
AC3.3V
+5V
STANDBY LED
U500 SC6311
VFD CONTROL / DRIVER
KEY SCAN
GVSW
CDR-W GAIN
CONTROL
+5V
VCC
DATA AND CONTROL
CPU
87EP26F-4K76
U406
TC74HC14
STB
DATA
CK
L CH
R CH
REC SIGNAL
OUTPUT
L CH
R CH
PICKUP
+5V
U402 TA2153
RF AMPLIFIER
U401 TC9462
BUS
DIGITAL SERVO
1 BIT D/A CONVERTER
L CH
R CH
U404 TC94A02F
SDA
CD ROM DECODE
REQ
MP3 DECODE
D/A CONVERTER
SCL
+9V
R832
10k
U201 TC9422F
R83110k
SYSTEM E.VOLUME
(Tone control input
selector Main volume)
D803
IN4001
Q812
SYS_MUTE
8050
+5V
FOO
TRO
U403 TA20
DMO
DIGITAL SERVO
FMO
LIMIT SW
ADDRESS BUS
U405 SRAM
128k x 8 (15
DATA BUS
VDD 3V
VDOT 3.3V
IC801 STK402-050
LOW LOGIC DETECT
PROTECT ENABLE
Q860,Q861,Q864,Q865
When use head
Q813
the control volt
8050
logic low le