Sony DSX-A50BT, Service Manual

Page: 26 / 40

DSX-A50BT
DSX-A50BT
26 26
• IC Block Diagrams
– MAIN Board –
IC102, 601 MM1836A33NRE
VOUT 4
CONT 1
GND 2
NC 3
VIN 5
+
–
VOLTAGE
REFERENCE
REGULATOR
CURRENT
LIMIT
THERMAL
SHUTDOWN
BIAS
IC304 LV47011P-E
TAB 1
PWR GND2 2
PWR GND1 8
PWR GND3 18
PWR GND4 24
OFFSET DIAG 25
OUT 2– 3
OUT 1– 7
OUT 2+ 5
VCC1/2 6
VCC3/4 20
OUT 1+ 9
STBY 4
+
–
+
–
STANDBY
SWITCH
MUTE
CIRCUIT
PROTECTIVE
CIRCUIT
PROTECTIVE
CIRCUIT
DC 10
IN1 11
RIPPLE
FILTER
IN3 15
AC GND 16
IN2 12
PRE GND 13
IN4 14
OUT 3+ 17
OUT 3– 19
+
–
MUTE 22
OUT 4+ 21
OUT 4– 23
+
–
IC401 LV56831P-E
NC
1
NC
4
NC
7
VCC
8
VCC1
9
AUDIO_EN
2
REG_EN
10
IKREG
11
AMP_EN
12
AMP
13
GND
14
AUDIO
3
+ –
VDD
5
IKVDD
6
REG
15
+ – + – + –
START
UP
VREF
OVER VOLTAGE
PROTECTION
THERMAL
SHUTDOWN
OUTPUT
CONTROL
IC402 S-1142B90I-E6T1U
VOUT 1
ON/OFF 3
VIN 6
NC 4
VSS 5
VSS 2
+
–
OVERCURRENT
PROTECTOR
THERMAL
SHUTDOWN
REFERENCE
VOLTAGE
ON/OFF
CONTROL
IC501 OZ529IGN-A1-TR
BST 1
LX 2
FLT_USB 9
VIN 3
EN_SYS 4
USBOUT 5
ISET_USB 10
RT 15
VREF 16
FB_USB 6
USBIN
2V
UVLS
7
SYNC 8
GNDA 14
VIC_USB 11
SS_SYS 13
EN_USB 12
HDR
+
OSCILLATOR
REFERENCE
GENERATOR
OVER CURRENT
PROTECTION
VS
SEL
Q
S
R
ADJUSTMENT
GENERATOR
CHARGE
PUMP
OVER-CURRENT
LIMIT
USB FAULT
PROTECITON
VOUT_SYS (USBIN)
FAULT PROTECTION
+ –
+
–
+
–
+
–
– KEY Board –
IC901 PT6586-LQ
1 2 3 4 5 6 7 8 9 10 11 12
13
14
15
16
17
18
19
20
21
22
23
24
25 26 27 28 29 30 31 32 33 34 35 36
37
38
39
40
41
42
43
44
45
46
47
48
COM3
COM4
SEG35
OSC
CS
CLK
SI
VDD
VLCD1
VLCD2
VSS
SEG1/GP1 SEG2/GP2 SEG3/GP3 SEG4/GP4
SEG5 SEG6 SEG7 SEG8 SEG9
SEG10
SEG1
1
SEG12
SEG34 SEG33 SEG32 SEG31 SEG30 SEG29 SEG28 SEG27 SEG26 SEG25 COM2 COM1
SEG24
SEG23
SEG22
SEG21
SEG20
SEG19
SEG18
SEG17
SEG16
SEG15
SEG14
SEG13
SEGMENT
DRIVER & LA
TCH
SHIFT
REGISTER
COMMON
DRIVER
CLOCK
GENERATOR
ADDRESS
DETECTOR
INHB