Read Sony STR-DH740 Service Manual online
STR-DH740
STR-DH740
20
20
5-6. BLOCK DIAGRAM – DISPLAY/POWER Section –
+15V
RECT
D923
RECT
D910-913
SYSTEM CONTROL
IC2100 (6/6)
VACUUM FLOURESCENT
DISPLAY
ND100
MASTER
VOLUME
VOLUME
ROTARY
ENCODER
S121
S115
S108 ~ S110,
S111 ~ S114
S111 ~ S114
S101 ~ S105
X2100
4MHz
F910
RY951
F911
REMOTE CONTROL
SIGNAL RECEVER
IC101
INPUT
SELECTOR
ROTARY
ENCODER
S120
-7V
+HV
(VCC)
TO
AUDIO AMP
SECTION
-HV
(VCC)
+7V
+7V
+5V
+5V
+3.3V
F940
F941
+3.6V (DCDC)
+2V (DCDC)
+1.2V
+1.2V
+6V (DCDC)
STBY +3.3V
STBY +3.3V
D902
POWER
TRANSFORMER
(SUB)
T902
POWER
TRANSFORMER
(MAIN)
T901
F901
AC IN
RECT
D900 ~ D901,
D904 ~ D905
RECT
D921
RY920
F913
F912
F1
F2
+7V REG.
IC350
+7V REG.
IC351
-7V REG.
IC352
+5V REG.
IC2106
+5V REG.
IC2110
+3.3V REG.
IC102
RELAY DRIVE
Q920
+3.6V REG.
IC1902
+3.3V REG.
IC902
+1.2V REG.
IC2500
+1.2V REG.
IC3508
+5V
F1
F2
F2
+5V REG.
IC3503
+2V REG.
IC1903
+6V REG.
IC1904
RELAY DRIVER
Q901
DC CONVERTER
TRANSFORMER
T100
SWITCHING
TRANSISTOR
Q102
LED DRIVER
Q105
LED
(PURE DIRECT)
D104
LED DRIVER
Q110
LED DRIVER
Q111
LED
(ON/STBY)
D110
SWITCHING
TRANSISTOR
CONTROL
Q103 ~ Q104
AC OFF DETECT
Q900
98
POWER_RY
9
FL_ENABLE
64
WHITE_LED
71
FLASH_CLK/POWER_LED
82
STDBY_LED
93
AC_CUT
87
BRIDGEABLE_RY
42
40
38
53 FL_LAT
55 FL_CLK
54 FL_DATA
55 FL_CLK
54 FL_DATA
59 SIRCS_IN
63 VOLUME_JOG
52 INPUT_JOG
65 POWER_KEY
57 AD_KEY1
58 AD_KEY2
48 PE2/X0
49 PE3/X1
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