Sony MDX-C7970/C7970R, Service Manual

Page: 26 / 74

MDX-C7970/C7970R
– 31 –
4-5. BLOCK DIAGRAM – BUS CONTROL/POWER SUPPLY Section –
– 32 –
5V
5V
RESET SIGNAL
GENERATOR
IC801
SIRCS BUFFER
Q602
REMOTE CONTROL
RECEIVER
IC502
RAM RESET
IC802
BATTERY
DETECT
Q601
ACCESSORY CHECK
Q900
LEVEL SHIFT
Q603
6
8
4
CLK
ANT+B
FM8V
AMP+B
REGULATOR
IC800
COM8V
AM8V
MODE1 MODE2 STB
CLK IN
DATA OUT
DATA
2
RST
RESET
SWITCH
BUS ON
SWITCH
13
11
1
BUS ON
OUT
BUS
ON IN
12
9
DATA IN
SONY BUS INTERFACE
IC600
MASTER CONTROLLER
IC700 (4/4)
MD MECHANISM CONTROLLER
IC501 (2/2)
BUS ON SWITCH
Q600
BATT
BATT B+
BUS ON
DATA
CLK
RESET
7
6
5
4
2
SIRCS
3
16
BATT
ANT REM
AMP REM
6
5
CNJ600
BUS CONTROL IN
(FOR SONY BUS)
CNP500 (2/2)
(POWER CONNECTOR)
REGULATOR
CONTROL SWITCH
Q906
F1
COM +8V
(AUDIO CIRCUIT B+)
05
RST
3
BATT BATTERY
SWITCH
10
BU IN
UNISI
50 UNISO
UNICKIO
MDMON 10
76
36
22 UNI CKIO
20 UNI SI
21 UNI SO
86 HSTX
29
24 SIRCS
90
65 MD-ON
D702
D916
D605
TH600
D604
D603
D606
D913
D500
LED891,
LSW890
LED891
(MD DISC SLOT)
VCC
AM B+
(AM CIRCUIT B+)
FM B+
(FM CIRCUIT B+)
VCC 7
7
ACC
14
ILL IN
+5V
REGULATOR
Q6
+10V
REGULATOR
Q903, 904
+12V
REGULATOR
Q254
+3.3V
REGULATOR
IC401, Q401
DC/DC
CONVERTER
IC250
+5V
(TUNER CIRCUIT B+)
TUNER B+
B+ SWITCH
Q402, 403
B+ SWITCH
Q250, 251
+3.3V
D3
D803
D804
5V
2 3 4
9
BU+B 5
10
11
8
6
FM-ON
TU-ON
LAMP ON (ILL ON)
64
108
110
PW-ON 109
111
RESET
SYSRST
RAMBU
BU-IN
BUS-ON
RESET
LINKOFF
BU-IN
BUS-ON
ACC IN
57
ILL IN
25 PACK-IND
48
61
60
30
49
46
102
J
(Page 28)
MUTE
H
(Page 28)
AMP ON
I
(Page 28)
STB
5V
MOTOR/COIL DRIVER
(IC303) B+
LOAD +12V
LOADING MOTOR
DRIVER (IC305) B+
REGULATOR
CONTROL SWITCH
Q907
REGULATOR
Q908
LCD +10V
LCD DRIVER (IC501)/
ILLUMINATION LED B+
REGULATOR
CONTROL SWITCH
Q255
BATT B+
POWER AMP
(IC500) B+
S900
(RESET)
D802
D607
LSW890
6