Read Sony STR-KM22 / STR-KM55 / STR-KM77 Service Manual online
5-4. BLOCK DIAGRAM – DISPLAY/POWER SUPPLY Section –
70 TEMP_SENSOR_1
43 FL_CLK
1 VO
44 FL_DATA
45 FL_LAT
45 FL_LAT
SYSTEM CONTROL
IC2106
(4/4)
+3.3V REG
IC1601
+3.3V (STBY)
VACUUM FLUORESCENT
DISPLAY
ND101
POWER
TRANSFORMER
(MAIN)
T901
POWER
TRANSFORMER
(SUB)
T903
F921
RECTIFIER
D1002
TH252
REMOTE CONTROL
SIGNAL RECEIVER
IC102
INPUT_JOG 52
INPUT_LED 30
CLK 29
DIN 27
STB 31
SIRCS_IN 53
1 F+
15 VDD
2 F+
53 F-
54 F-
54 F-
INPUT
SELECTOR
EN100
VOLTAGE
SELECTOR
S901
VOLUME_JOG 54
POWER_DET 56
MASTER
VOLUME
VOLUME
EN101
SPEAKER
SETTINGS
"/1
S100
AD_KEY1 57
AD_KEY2 55
S101
MUSIC/
MOVIE
S102
M-TURBO
S103
GAME
S104
FOOTBALL
S105
LED DRIVER
Q112
RELAY DRIVER
Q903
+3.3V
STBY SUPPLY
Q2709
VOL_LED 31
LED DRIVER
Q111
LED_BAR 32
LED DRIVER
Q110
BAR LED
D130, D132, D133
D135, D136, D138
D135, D136, D138
VOLUME LED
D139, D141, D142
D144, D146, D147
D144, D146, D147
INPUT LED
D110 ~ D115
69 TEMP_SENSOR_2
TH251
66 TEMP_SENSOR_3
TH253
40 POWER_RY
39 STOP
PH 8
2 VIN
BOOT 1
+3.3V (VMCU)
+6V
+4V
+3.3V (AUDIO)
+3.3V (AUDIO)
SWITCHING
TRANSISTOR
Q101
F101
FAN DRIVER
Q900 ~ Q902
Q900 ~ Q902
12 VIN
8 VH
10 SW
24 LOT26_PCONT
11 BRIDGEABLE_RY
41 FUSE_DET
42 FAN _BLK
18 PROTECT
37 FAN _CTRL
~ AC IN
120V
220V
240V
F922
F902
F901
RECTIFIER
D902 ~ D905
D960
RECTIFIER
D910 ~ D913
POWER
TRANSFORMER
(SUB)
T904
RELAY DRIVER
Q920
AC OFF DETECT
Q904
RY901
+6V REG
IC1500
PH 8
2 VIN
+13V
-7V
+7V
+B
-B
BOOT 1
+4V REG
IC1600
PH 8
2 VIN
BOOT 1
+3.3V REG
IC2010
VO 1
6 VCC
4 EN
4 EN
+12V REG
IC900
OUT 3
1 IN
F914
RECTIFIER
D921
F915
-7V REG
IC352
OUT 3
2 IN
+7V REG
IC350
OUT 3
1 IN
F911
F910
+3.3V REG
IC103
VOUT 3
4 VDD
17 K2
21 K1
21 K1
+5V REG
IC1602
D1603
OUT 3
1 IN
+12V REG
IC1603
OUT 3
1 IN
D102, D103
CN904
2 1
CN903
2 1
3
M
M2
(FAN)
M
M1
(FAN)
D2306
(2/2)
RY920
RELAY DRIVER
Q931
+B
-B
F931
RECTIFIER
D932
F932
RY931
3
KM55, KM77
KM55, KM77
E51, EA
E51, EA
EXCEPT E51, EA
STR-KM22/KM55/KM77
STR-KM22/KM55/KM77
18
18
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