Read Sony XR-4950X / XR-4954X Service Manual online
XR-4950X/4954X
19
19
– DISPLAY/KEY CONTROL/BUS CONTROL/POWER SUPPLY SECTION –
MASTER MICRO COMPUTER
IC501 (3/3)
82
RE-IN1
KEYACK
26
KEYIN1
RE-IN0
81
80
KEYIN0
RC-IN0
RC-IN1
5
4
7
24
KEY ON
SWITCH
Q551
D501
ENCODE –
ENCODE +
D533
AD-ON
S901 – 904
LSW901 – 904,
906, 907, 909
ROTARY
ENCODER
RE901
BU+B
(VOLUME)
RE901
J561
REMOTE IN
DOORSW
78
CN901
(FRONT PANEL SIDE)
CN701
(MAIN UNIT SIDE)
1
9
OSCOUT
OSCIN
XOUT
XIN
12
13
16
15
X501
18.432MHz
X502
32.768kHz
LSW901 – 904, 906, 907, 909
LSW912 – 917
LSW912 – 917
LED901 – 904
DI
64
CL
63
60
CE
OSC
62
LCD SO
CLK-LCD
CE-LCD
DATA-LCD
13
LCD CKO 14
16
LCD CE
FP+B
FP+B
LIQUID CRYSTAL DISPLAY DRIVER
IC901
4
–
51
S04
–
S51
52
–
55
COM1
–
COM4
LIQUID CRYSTAL DISPLAY
LCD901
09
BU+B
RESET
IC551
BATTERY CHECK
Q581
BATT B+
BUIN
BUIN
28
BUIN
33
D581
RESET
S551
(RESET)
DSTSEL
6
ANT+B
TU+B (8V)
REGULATOR
IC611
COM8V
TU+B (5V)
TUNER 5.6
TUNER 8.7
STB
18
BATT
ANT REM
6
CN781 (2/2)
(POWER CONNECTOR)
COM +8V
(AUDIO CIRCUIT B+)
D572
TU5V
FM/AM TUNER UNIT
TU8V
VCC
7
7
ACC
DOOR
INDICATOR
SWITCH
Q631
DOOR IND 79
LSW801
LED801
FP REGULATOR
DRIVE
Q602
ACCESSORY
CHECK
Q571
FP REGULATOR
Q601
FP B+
2
3
4
9
BU+B
BU +B
D551
5
10
11
8
AMP+B
6
TUON
PWON
83
ILL-ON
34
36
BATT B+
POWER AMP
(IC751) B+
AMP REM
5
D610
D611
38
ACC IN
XR-C4950X
XR-C4954X
S501
(FREQUENCY SELECT)
LSW801
NOSESW
18
(NOSE SW)
S552
BACK UP
LED910 – 914
(LCD BACK LIGHT)
NON BUS SWITCH
Q591, 592
BU+B
BATT+B
9 kHz
10kHz
R560
47k
BU+B
BU+B
BU+B
R531
22k
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