Read Sony SRS-DB500 Service Manual online
SRS-DB500
SRS-DB500
10
10
4-3. BLOCK DIAGRAM - PANEL/POWER SUPPLY Section -
3
POWER CONTROL
IC901
D
(AC IN)
MAIN POWER
TRANSFORMER
T901
SUB POWER
TRANSFORMER
T902
F901
D908
ISOLATOR
PC901
B+ SWITCH
Q901
4 VCC
1 OCP/SYNC
5 FB/OLP
1
POWER CONTROL
IC921
DRAIN
4 VCC
6 FB/OLP
8 START_UP
RECT
D931
D931
D932
SHUNT
REGULATOR
IC931
D922
D910
D905
D906, 907
POWER ON/OFF
CONTROL
Q943, 947
+28V
RECT
D943
D943
D914, 915
TH901
POWER VOLTAGE
CONTROL
Q981, 982
ISOLATOR
PC902
LF901
LINE
FILTER
LF902
LINE
FILTER
RECT
D901
D901
AMP +1.8V
+1.8V
REGULATOR
IC491
RECT
D941
D941
+12V
REGULATOR
IC941
A +9V
SHUNT
REGULATOR
IC951
49
P_CON1
50
P_CON2
SYSTEM CONTROLLER
IC001 (3/3)
7 LED_A
2 LED_CKS
4 LED_CKL
2 LED_CKS
4 LED_CKL
LED DRIVER
IC005
4
A
8
CKS
6
CKL
6 LED_/OE
5
/OE
/Q1 – /Q9
21 SIRCS
ROTARY
ENCODER
S001
REMOTE CONTROL
RECEIVER
IC002
I/
1
32 PWR_KEY
15
14 MASTER_VOLUME1
S051
+9V
REGULATOR
IC253
D909
MASTER_VOLUME2
A +12V
+3.3V
REGULATOR
IC943
D +3.3V
D051
LED DRIVE
Q001
13 LED_STANDBY
ISOLATOR
PC903
43 STATIC_KEY2
+5V
REGULATOR
IC391
+5V
8
RESET
RESET SIGNAL
GENERATOR
IC004
RIPPLE
FILTER
Q921
D923
(AEP, UK, SP, AR, AUS, CH)
D001
I/
1
JOG
(VOLUME, BASS, TREBLE)
INPUT
S052
42 STATIC_KEY1
S053
41 STATIC_KEY0
S054
D003 – 010,
D002
(VOLUME/BASS/TREBLE LEVEL)
/Q14 – /Q16
D011 – 014
(ILLUMINATION)
D053
16 /Q11
INPUT 2
D015
17 /Q10
MUTING
D054
15 /Q12
D055
14 /Q13
E +4V
TREBLE
BASS
TREBLE
BASS
1, 2, 24 – 18
13, 1
1, 12
(US, CND, E92, MX, TW)
: Chinese model
Abbreviation
CH
: Canadian model
CND
: Brazilian, Colombian and Venezuelan models
E92
: Mexican model
MX
: Argentina model
AR
: Australian model
AUS
: Singapore model
SP
: Taiwan model
TW
Ver. 1.3
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