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Sony SA-WCT770, Service Manual

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Sony SA-WCT770 Service Manual Download Page 27

SA-WCT770

27

– POWER Board –
IC910  STR-A6159M

IC920  STR-W6735N (US, Canadian and Taiwan models)
IC920  STR-W6765N (Except US, Canadian and Taiwan models)

1

SOURCE/OCP

8 D
7 D

5 STARTUP

6 NC

2

VCC

4

FB/OLP

3

GND

THERMAL

SHUTDOWN

DELAY

BUFFER

BLANKING

DISCHARGE

LATCH

INTERNAL

BIAS

UNDERVOLTAGE

LOCKOUT

OVER LOAD

PROTECTION

OVER VOLTAGE

PROTECTION

OVER

CURRENT

PROTECTION

OFF TIMER

DRIVE

+
–

S

R

PWM

LATCH

FEED
BACK

BIAS

BURST

Q

D 1

NC 2

S/GND 3

VCC 4

SS/OLP 5

FB 6

OCP/BD 7

DELAY

Q

R

S

+
–

+
–

+

–

Q

S

R

+

–

BOTTOM

SELECTOR

COUNTER

OSC

R

Q

S

SOFT START

+
–

OVP

REGULATOR

& ICONST

+
–

BURST

CONTROL

START/STOP

BURST

PROTECTION

LATCH

DRIVE

REGULATOR

OLP

BSD

BD

OCP

FB

Ver. 1.1

Summary of Contents for SA-WCT770

Page 1: ...0 W per channel at 4 ohms 100 Hz Except Chinese model 75W per channel at 4 ohms 100 Hz Chinese model Speaker system Subwoofer system Bass reflex Speaker 160 mm 6 3 8 in cone type Rated impedance 4 ohms Power requirements 120 V AC 60 Hz US and Canadian models 220 V 240 V AC 50 Hz 60 Hz AEP UK Australian Chinese and Singapore models 110 V 240 V AC 50 Hz 60 Hz Saudi Arabia model 120 V AC 50 Hz 60 Hz ...

Page 2: ...incorporates High Definition Multimedia Interface HDMI technology The terms HDMI and HDMI High Definition Multimedia Interface and the HDMI Logo are trademarks or registered trademarks of HDMI Licensing LLC in the United States and other countries BRAVIA logo is a trademark of Sony Corporation DSEE is a trademark of Sony Corporation x v Color and x v Color logo are trademarks of Sony Corporation P...

Page 3: ...1 14 3 TROUBLESHOOTING 15 4 DIAGRAMS 4 1 Block Diagram 16 4 2 Printed Wiring Board SUB MAIN Board Side A 18 4 3 Printed Wiring Board SUB MAIN Board Side B 19 4 4 Schematic Diagram SUB MAIN Board 1 2 20 4 5 Schematic Diagram SUB MAIN Board 2 2 21 4 6 Printed Wiring Board POWER Board 22 4 7 Schematic Diagram POWER Board 23 4 8 Printed Wiring Boards SUB LED SUB KEY Boards 24 4 9 Schematic Diagram SUB...

Page 4: ...ck in advance that you have all of the units NOTE OF PERFORMING THE OPERATION CHECK IN THE STATE THAT HEAT SINK WAS REMOVED When performing the operation check in the state that this unit was disassembled it is possible to perform the operation check in the state that heat sink was removed But don t perform the operation check in the long time and perform the operation check in the volume state as...

Page 5: ...ay be different from the model number label of a main unit Rear view Rear view US and Canadian models MODEL NUMBER LABEL 4 488 123 0 UC MODEL NUMBER LABEL Part No Destination code Destination Part No Destination code AEP UK 4 488 132 0 CEL Singapore 4 529 514 1 SP1 Australian 4 529 515 1 AU1 Taiwan 4 529 591 0 TW2 Chinese 4 529 593 0 CN4 Saudi Arabia 4 531 646 1 EA3 Ver 1 1 ...

Page 6: ...POWER BOARD Page 9 2 10 REAR PLATE BLOCK Page 11 2 11 SUB MAIN BOARD Page 12 2 9 RF MODULATOR SWA12 4V RX RF1 Page 11 2 13 LOUDSPEAKER 16 cm SP1 Page 14 2 12 BOTTOM PANEL BLOCK Page 13 2 4 SUB LED BOARD Page 8 2 6 TOP PLATE BLOCK FUSE F900 Page 9 1 five screws BVTP3 u 8 3 Pull out the power cord 2 Remove the rear panel block in the direction of an arrow 4 rear panel block Rear view JIG When disass...

Page 7: ... and top panel block is removed 2 Insert the jig into a space and raise top panel block Note 2 When using a jig please work so as not to injure top panel block 2 Insert the jig into a space and raise top panel block Note 2 When using a jig please work so as not to injure top panel block 1 screw BVTP3 u 8 Note 1 Please use the extra long screwdriver 1 screw BVTP3 u 8 Note 1 Please use the extra lon...

Page 8: ...rd front edge of the top panel front edge of the top panel LED cover is over the front edge of the top panel OK NG 1 tapping screw 3 5 u 14 1 two tapping screws 3 5 u 14 3 speaker connector CN109 4 sub AMP block 1 tapping screw 3 5 u 14 2 Lift the sub AMP block in the direction of an arrow Rear view sub AMP block screw hole Speaker wire is front side Speaker wire is rear side sub AMP block screw h...

Page 9: ...he position of two holes match two bosses top plate block Sub AMP block rear view ire VeWWiQJ 5 screw BV3 u 8 CU 0 POWER board 4 connector CN114 8 Remove the POWER board block in the direction of the arrow clamp L35 power cord POWER board POWER board coating clip SUB MAIN board connector CN114 3RZHU FRUG VHWWLQJ LUH VHWWLQJ 2 power cord connector CN900 7 clamp L35 6 screw BV3 9 label fuse T H FHSW...

Page 10: ...power cord connector CN900 1 Remove the power cord from the clamp L35 3 Remove the power cord from two wire holders wire holder wire holder power cord POWER board 3RZHU FRUG VHWWLQJ power cord AC1 cord bushing FBS001 claw 270 mm to POWER board clamp L35 6XE 03 EORFN UHDU YLHZ Note When installing the power cord AC1 check the direction of claw of cord bushing FBS001 and install correctly 4 two claw...

Page 11: ... RF modulator block in the direction of the arrow Note 2 When installing the flexible flat cable ensure the colored line No slanting after insertion Sub AMP block rear view colored line colored line Insert is straight to the interior Insert is incline flexible flat cable flexible flat cable connector connector OK NG Sub AMP block rear view 1 two screws BV3 1 screw BV3 1 two screws BV3 1 screw BV3 ...

Page 12: ...5 heatsink main 3 connector CN111 1 Remove two wires from the coating clip coating clip SUB MAIN board connector CN114 connector CN111 LUH VHWWLQJ 6 screw BV3 u 8 CU Note When installing the heatsink main spread the compound referring to NOTE OF REPLACING THE IC104 ON THE SUB MAIN BOARD AND THE COMPLETE SUB MAIN BOARD on servicing notes page 3 ...

Page 13: ...moved 1 Insert a flat head screwdriver in two slits behind a unit and lift the bottom panel block a little 4 bottom panel block Note 3 When installing the bottom panel block remove the used bond and use a new bond to fix the bottom panel block 2 Insert the jig into a space and raise bottom panel block Note 2 When using a jig please work so as not to injure bottom panel block 2 Insert the jig into ...

Page 14: ... an arrow 3 terminal red wide side 3 terminal black narrow side Note 1 Please spread a sheet under a unit not to injure top panel Rear bottom view red wide side black narrow side ire VettiQJ rear side front side terminals position Note 2 When installing the loudspeaker 16 cm SP1 make sure that there is a position of the speaker terminal to the position shown in the figure below Bottom view ...

Page 15: ... 31 of IC104 on the SUB MAIN board do not short circuits or opens No Replace the IC104 on the SUB MAIN board Yes ON STANDBY lamp LED does not light up Power is not turned on The voltage of the following is 4 1 V POWER board CN901 pin 9 The voltage of the following is 3 3 V SUB MAIN board IC100 pin 61 62 Yes POWER board is damaged Yes Yes Vibrator X100 on the SUB MAIN board is oscillated after AC i...

Page 16: ...C_CUT RESET 13 P_CONT1 3 3V 12 P_CONT2 14 P_CONT_PVDD TH900 RECT D900 42 PVDD_SD_EN RECT D940 RECT D950 REGULATOR Q923 ISOLATOR PC901 RESET SWITCH Q102 SHUNT REGULATOR IC950 ISOLATOR PC902 ISOLATOR PC903 SHUNT REGULATOR IC940 POWER VOLTAGE CONTROL Q961 962 POWER ON OFF CONTROL Q960 VOLTAGE DETECT IC101 T901 SUB POWER TRANSFORMER T902 MAIN POWER TRANSFORMER D911 D929 D924 D925 926 D930 D928 TH920 D...

Page 17: ... the side which enables seeing The other layers patterns are not indicated Abbreviation CND Canadian model TW Taiwan model Indication of transistor C B These are omitted E Q C E B These are omitted Caution Pattern face side SIDE B Parts face side SIDE A Parts on the pattern face side seen from the pattern face are indicated Parts on the parts face side seen from the parts face are indicated Wavefo...

Page 18: ...L169 SL122 CL170 CL171 CL172 CL173 CL174 CL175 CL176 FB100 FB101 FB102 FB103 FB104 FB105 R103 R104 R105 R108 R109 R110 R111 R112 R113 R114 R115 R117 R118 R119 CN102 R120 R121 CN107 R124 R125 CN109 R126 R127 R128 CN111 CN113 R130 CN114 R131 R135 C101 C102 C103 C104 C105 C106 C107 C108 C109 R148 R149 C110 X100 X101 C112 C113 C114 C115 R152 C116 R153 C118 R154 C119 R155 R156 R158 R159 C120 C122 R160 ...

Page 19: ...L187 CL188 CL189 CL190 CL191 CL192 JL104 JL105 JL106 JL107 JL113 JL114 JL115 JL116 JL117 JL118 JL122 JL123 JL124 JL125 JL126 JL127 JL128 JL129 JL131 JL132 JL135 JL137 JL139 JL144 JL148 JL150 JL152 JL153 JL157 JL158 JL159 JL160 JL161 JL162 JL163 JL164 JL165 JL166 JL167 JL168 JL169 JL170 SUB MAIN BOARD SIDE B 1 889 802 A B C D E F 1 2 3 4 5 6 7 8 9 10 11 11 12 11 12 Ver 1 1 ...

Page 20: ...8 DRIVE_RST EN 29 DAMP_INIT 30 DAMP_OVF 31 DAMP_LATCH 32 DAMP_SOFT_MUTE 33 DAMP_OVF2 34 DAMP_LATCH2 35 NO USE 36 AC_CUT 37 FW_TxD 38 FW_RxD 39 NO USE 40 NO USE 41 NO USE 42 PVDD_SD_EN 43 DC_DET 44 NO USE 45 DRIVE_SD 46 S AIR FREQ DET 47 S AIR DET 48 S AIR_GPIO2 49 KEY_POWER 50 S AIR_RESET 51 KEY_PAIRING 52 SUR_MODE_SW 53 SHIMUKE 54 MODEL 55 FAN_ON 56 FAN_DET 57 S AIR_RF_FB 58 NO USE 59 Vss 60 NO U...

Page 21: ..._C OUT_C PVDD_C BST_C BST_B PVDD_B OUT_B GND_B GND_A OUT_A PVDD_A PVDD_A NC BST_A GVDD_A 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 CXD9843AR IC105 XVSS VSUBC VSSR OUTR2 VDDR OUTR1 VSSR VSSL OUTL2 VDDL OUTL1 VSSL XOVSS XFSOOUT XOVDD DVDD DVSS NSPMUTE SOFTMUTE PGMUTE SCDT SCSHIFT SCLATCH FLAGR FLAGL SFLAG IN...

Page 22: ... D929 D930 D931 D932 1 1 3 1 3 4 2 3 1 4 5 8 3 4 6 7 5 E 10 6 5 1 2 4 7 8 14 1 1 2 4 3 1 2 4 3 1 2 4 3 E E 9 1 D940 IC920 D950 JS901 JS902 JS903 JS904 JS905 LF001 LINE FILTER F900 Q901 Q920 PC901 PC902 PC903 EB901 EB902 VDR900 R900 R911 R913 CN900 CN901 R921 R922 R923 FR910 R924 R926 FH900 FH901 C903 US CND TW C904 Except US CND TW TH900 A001 A002 C907 C911 C914 C917 C919 C924 C927 C940 C941 C951 ...

Page 23: ... OCP BD JL913 JL902 JL909 JL917 JL911 JL901 JL908 JL904 JL912 JL903 JL919 JL914 JL900 JL905 JL915 JL906 JS902 JS904 JS901 JS903 JS905 LF001 EL816M B DTE S PC902 1 2 4 3 EL816M B DTE S PC901 1 2 4 3 2SA1980 AT Q901 LSCR523UBFS8TL Q961 2SD1388TP 4 Q920 2SC5053T100Q Q923 LTC044EUBFS8TL Q960 LTC044EUBFS8TL Q962 LTC044EUBFS8TL Q921 LTA014EUBFS8TL Q922 1 2W FR910 1 R923 R926 820 47 R924 2W R913 100k R91...

Page 24: ... D901 A K A K RED GRN A A K K 1 889 803 LINK S001 002 1 889 804 SUB MAIN BOARD CN113 01P A B C D 1 2 3 4 SUB LED BOARD 11 12 11 12 11 12 11 12 3P CN901 LED R 1 LED G 2 GND 3 CL 165HR HG5 D T D901 R901 82 R900 220 0 R904 SUB LED BOARD CN111 SUB MAIN 02S 1 2 BOARD 1 C D 2 B 3 A 4 RED GRN ON STANDBY LAMP 0 1 C002 0 1 C001 CL004 CL005 3P CN002 1 GND 2 KEY_PAIR 3 KEY_POWER S001 S002 LINK SUB KEY BOARD ...

Page 25: ...RCV CTRL TIMING GATE DRIVE BTL PBTL CONFIGURATION PULLDOWN RESISTOR 26 33 34 32 31 30 8 PWM RCV CTRL TIMING GATE DRIVE BTL PBTL CONFIGURATION PULLDOWN RESISTOR 29 24 25 23 36 18 19 20 21 22 PWM RCV CTRL TIMING GATE DRIVE BTL PBTL CONFIGURATION PULLDOWN RESISTOR 27 28 POWER ON RESET TEMP SENSE UNDER VOLTAGE PROTECTION 4 VREG I SENSE 13 14 15 17 12 7 11 9 10 M3 M2 M1 PWM_C RESET_CD GVDD_B DTW NC NC ...

Page 26: ...MUTE SAMPLING RATE CONVERTER FILTER LOW CUT FILTER LINER INTERPOLATOR 6 48 XFSOIN 47 XVDD HPVDDL 46 45 HPOUTL1 HPVSSL 44 43 HPOUTL2 HPVDDR 42 41 HPOUTR1 HPVSSR 40 HPOUTR2 39 37 FSOCKO 38 FSOI 13 XOVSS 14 XFSOOUT 15 XOVDD 16 DVDD 17 DVSS 18 NSPMUTE 19 SOFTMUTE 20 PGMUTE SERIAL CONTROLLER 21 SCDT 22 SCSHIFT 23 SCLATCH 24 OVFFLAGR 28 MCKSEL 32 BFVDD 33 BFVSS 34 TEST 35 DVDD 36 XFSIIN LRCK BCK DATA VO...

Page 27: ...N DELAY BUFFER BLANKING DISCHARGE LATCH INTERNAL BIAS UNDERVOLTAGE LOCKOUT OVER LOAD PROTECTION OVER VOLTAGE PROTECTION OVER CURRENT PROTECTION OFF TIMER DRIVE S R PWM LATCH FEED BACK BIAS BURST Q D 1 NC 2 S GND 3 VCC 4 SS OLP 5 FB 6 OCP BD 7 DELAY Q R S Q S R BOTTOM SELECTOR COUNTER OSC R Q S SOFT START OVP REGULATOR ICONST BURST CONTROL START STOP BURST PROTECTION LATCH DRIVE REGULATOR OLP BSD B...

Page 28: ...d 31 DAMP_LATCH O Serial data latch pulse signal output to the stream processor 32 DAMP_SOFT_MUTE O Soft muting on off control signal output to the stream processor L muting on 33 DAMP_OVF2 I Overflow detection signal input terminal Not used 34 DAMP_LATCH2 O Serial data latch pulse signal output terminal Not used 35 NO USE O Not used 36 AC_CUT I AC cut detection signal input terminal L AC cut is d...

Page 29: ...number in the exploded views are not sup plied Color Indication of Appearance Parts Ex ample KNOB BALANCE WHITE RED Parts Color Cabinet s Color Abbreviation AUS Australian model CH Chinese model CND Canadian model EA Saudi Arabia model SP Singapore model TW Taiwan model 5 1 OVERALL SECTION A A not supplied SUB LED board not supplied not supplied not supplied sub AMP section subwoofer cabinet secti...

Page 30: ...32 51 FUSE H B C T 5 AH 250 V TW FFC1 9 885 194 87 FFC 24P RX SUB MAIN 77 RF1 1 492 348 11 RF MODULATOR SWA12 4V RX 3 7 685 648 79 SCREW BVTP 3X12 TYPE2 IT 3 Ref No Part No Description Remark Ref No Part No Description Remark C D B B D C C not supplied not supplied not supplied 51 3 3 AC1 57 51 51 51 51 51 not supplied not supplied not supplied 55 55 F900 52 51 51 Except US CND not supplied not su...

Page 31: ...4 452 796 01 SPACER CAB1 A 1989 232 A SPEAKER CABINET ASSY Including Speaker Wire US CND CAB1 A 1989 235 A SPEAKER CABINET ASSY Including Speaker Wire Except US CND SP1 1 858 535 21 LOUDSPEAKER 16 cm Ref No Part No Description Remark Ref No Part No Description Remark SP1 CAB1 101 102 104 103 101 101 101 103 103 103 103 103 103 103 Ver 1 1 ...

Page 32: ... 0 047uF 10 50V C954 1 118 345 11 CERAMIC CHIP 0 01uF 10 25V C960 1 118 347 11 CERAMIC CHIP 0 1uF 10 25V CONNECTOR 0 CN900 1 564 321 11 PIN CONNECTOR 3 96 mm PITCH 2P DIODE 0 D900 8 719 077 77 DIODE D3SB60F3 0 D901 8 719 063 74 DIODE D1NL20U TR2 0 D902 6 502 961 01 DIODE DA2J10100L 0 D910 6 501 297 01 DIODE 1F6G 0 D911 8 719 063 74 DIODE D1NL20U TR2 0 D912 6 503 022 01 DIODE DZ2J100M0L 0 D913 6 50...

Page 33: ... 61 METAL OXIDE 0 33 5 2W F US CND TW 0 R922 1 216 365 61 METAL OXIDE 0 47 5 2W F Except US CND TW 0 R923 1 215 929 51 METAL OXIDE 100K 5 3W F US CND TW 0 R923 1 216 492 51 METAL OXIDE 82K 5 3W F Except US CND TW 0 R924 1 249 401 91 CARBON 47 5 1 4W F 0 R925 1 216 829 91 METAL CHIP 4 7K 5 1 10W 0 R926 1 249 416 91 CARBON 820 5 1 4W F 0 R927 1 216 829 91 METAL CHIP 4 7K 5 1 10W 0 R928 1 216 864 91 ...

Page 34: ...5 908 11 CERAMIC CHIP 1uF 10 10V C165 1 118 048 11 CERAMIC CHIP 2 2uF 10 50V C166 1 118 459 11 CERAMIC CHIP 0 01uF 10 25V C167 1 116 719 11 CERAMIC CHIP 10uF 10 6 3V C170 1 110 530 11 ELECT CHIP 1000uF 20 6 3V C172 1 118 048 11 CERAMIC CHIP 2 2uF 10 50V C174 1 118 048 11 CERAMIC CHIP 2 2uF 10 50V C175 1 117 681 11 ELECT CHIP 100uF 20 16V C177 1 118 048 11 CERAMIC CHIP 2 2uF 10 50V C178 1 117 681 1...

Page 35: ...TAL CHIP 330 5 1 16W R160 1 218 945 11 METAL CHIP 220 5 1 16W R161 1 218 990 81 SHORT CHIP 0 R164 1 218 953 11 METAL CHIP 1K 5 1 16W R165 1 218 965 11 METAL CHIP 10K 5 1 16W R167 1 218 965 11 METAL CHIP 10K 5 1 16W R171 1 218 965 11 METAL CHIP 10K 5 1 16W R172 1 218 973 11 METAL CHIP 47K 5 1 16W R173 1 218 941 81 METAL CHIP 100 5 1 16W R174 1 218 981 81 METAL CHIP 220K 5 1 16W R175 1 218 969 11 ME...

Page 36: ...ORD POWER AUS 0 AC1 1 837 345 11 CORD POWER SUPPLY TW 0 AC1 1 837 822 21 CORD POWER SUPPLY CH 0 AC1 1 839 999 21 POWER SUPPLY CORD UK EA CAB1 A 1989 232 A SPEAKER CABINET ASSY Including Speaker Wire US CND CAB1 A 1989 235 A SPEAKER CABINET ASSY Including Speaker Wire Except US CND 0 F900 1 533 453 12 FUSE GLASS DIA 5 5 A 125 V US CND 0 F900 1 576 230 51 FUSE T 3 15 AH 250 V Except US CND TW 0 F900...

Page 37: ...MEMO SA WCT770 37 ...

Page 38: ... signal lines or the like in DIAGRAMS SECTION If a contact point of a BLOCK DIAGRAM PRINTED WIRING BOARD or SCHEMATIC DIAGRAM is shown in a different page use the PDF file search function to find one e g If a contact point is shown as follow the procedure below Procedure 1 Press the F key while pressing the Ctrl key 2 Input 001Z in the search box and press the Enter key 3 The relevant part page wh...

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