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3 7 63 1515 0
SERVICE MANUAL
STR-WX7 is the tuner and amplifier
section in MHC-WX7AV.
Amplifier section
The following measured at AC 120, 220, 240 V 50/60 Hz
DIN power output (Rated) (FRONT)
Continuous RMS power output (Reference)
TE
L 13942296513
Inputs
Output
Video section
Inputs
Outputs
www
.
MICROFILM
http://www.xiaoyu163.com
120 + 120W (6 Ω at 1kHz DIN)
FRONT SPEAKER: 150 + 150W
(6 Ω at 1kHz, 10% THD)
CENTER SPEAKER: 60W
(8 Ω at 1kHz, 10% THD)
REAR SPEAKER: 40 + 40W
(8 Ω at 1kHz, 10% THD)
MD/VIDEO 1 IN (phono jacks): voltage
450/250mV, impedance 47kΩ
AV INPUT AUDIO (phono jacks):
voltage 250mV, impedance 47kΩ
MIX MIC (phone jack): sensitivity 1mV,
impedance 10kΩ
MD/VIDEO 1 OUT (phono jacks):
voltage 450/250mV, impedance 1kΩ
PHONES (stereo phone jack): accepts
headphones of 8Ω or more.
FRONT SPEAKER:
accepts impedance of 6 to 16Ω
CENTER SPEAKER:
accepts impedance of 8 to 16Ω
REAR SPEAKER:
accepts impedance of 8 to 16Ω
SUPER WOOFER:
Voltage 1V, impedance 1kΩ
AV INPUT VIDEO (phone jack): 1Vp-p,
75Ω
MONITOR OUT (phone jack): 1Vp-p,
75Ω
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http://www.xiaoyu163.com
STR-WX7
2 9
8
SPECIFICATIONS
5Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range
Q Q
Antenna terminals
3
6 7
1 3
1 5
Intermediate frequency
AM tuner section
Tuning range
Middle Easten models:
Australian, Thai models : 531 – 1,602kHz(with the AM tuning
Other models:
Intermediate frequency
Antenna
FM STEREO/FM-AM RECEIVER
co
.
9 4
2 8
E Model
Australian Model
87.5 – 108.0MHz
75Ω unbalanced
0 5
8
2 9
9 4
2 8
10.7MHz
531 – 1,602kHz(with the MW interval set at
9kHz)
5.95 – 17.90MHz (with the SW interval set
at 5kHz)
interval set at 9kHz)
530 – 1,710kHz (with the AM tuning
interval set at 10kHz)
MW :
531 – 1,602kHz(with the MW tuning
interval set at 9kHz)
530 – 1,710kHz (with the MW tuning
interval set at 10kHz)
SW :
5.95 – 17.90 MHz (with the SW tuning
interval set at 5kHz)
450kHz
AM loop antenna
External antenna terminal
— Continued on next page —
m
9 9
9 9
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Summary of Contents for Sony STR-WX7
- Page 1 STR-WX7 3 7 63 1515 0 SERVICE MANUAL E Model Australian Model STR-WX7 is the tuner and amplifier section in MHC-WX7AV. SPECIFICATIONS Amplifier section 5Tuner section The following measured at AC 120, 220, 240 V 50/60 Hz FM stereo, FM/AM superheterodyne tuner DIN power output (Rated) (FRONT) 120 + 120W (6 Ω...
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Page 2: Table Of Contents
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Page 3: General
http://www.xiaoyu163.com SECTION 1 GENERAL 3 7 63 1515 0 Front Panel 1 2 3 4 5 #¢ #£ #™ !º #¡ #º @ª !¡ @• !™ @¶ @§ !£ @∞ @¢ @£ @™ @¡ @º !ª !• !¶!§ !∞ !¢ 1 MOVIE button !£... -
Page 4: Disassembly
http://www.xiaoyu163.com SECTION 2 DISASSEMBLY 3 7 63 1515 0 Note: Follow the disassembly procedure in the numerical order given. 2-1. SLIDING PANEL ASSEMBLY 4 Flat type cable (19 core) Slide mechanism 1 Push the OPEN/CLOSE button to open the Sliding panel assembly. 2 Screw (BVTP 3x8) 5 Sliding panel assembly 3 Holder level... -
Page 5: Service Mode
http://www.xiaoyu163.com SECTION 3 SERVICE MODE 3 7 63 1515 0 Connections and Operations When Used Alone Normally, use the unit connected to the HTC-WX5 as follows. Basically, when servicing the unit, connect the unit as follows. HTC-WX5 UNIT SYSTEM CONTROL 17P AC IN Even when not connected to the HTC-WX5, the unit can operate alone as it mounts a power supply (some functions will however not be available). - Page 6 http://www.xiaoyu163.com 3 7 63 1515 0 LED and Fluorescent Indicator Tube All Lit, Key Check Mode (Do not connect the HTC-WX5.) Procedure: Press 1/u button to turn the set ON. Press the OPEN/CLOSE button to open the sliding panel. Press three buttons PROLOGIC , ENTER/NEXT , and DISPLAY/DEMO simultaneously. LEDs and fluorescent indicator tube are all turned on.
- Page 7 http://www.xiaoyu163.com 3 7 63 1515 0 • When operations end abnormally: Display of fluorescent display tube Display Main Cause NO DISC ERR DISC 1 is NO DISC from the beginning FOCUS1 ERR Focus is not imposed properly FOCUS2 ERR The focus deviated several times after the disc rotated normally GFS ERR GFS ERROR FBIAS ERR...
- Page 8 http://www.xiaoyu163.com 3 7 63 1515 0 PANEL Aging Mode This mode is used for opening and closing the sliding panel continuously. Setting the aging mode : With the set at standby condition, press FLASH button, ENTER/NEXT button and STEREO/MONO button together. The aging will start and sliding panel will follow aging sequence as described below.
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Page 9: Diagrams
STR-WX7 SECTION 4 DIAGRAMS 3 7 6 3 1 5 1 5 0 4-1. CIRCUIT BOARDS LOCATION THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.) PRIMARY board For schematic diagrams. -
Page 10: Block Diagrams
STR-WX7 3 7 6 3 1 5 1 5 0 4-2. BLOCK DIAGRAM MAIN SECTIOAN VIDEO VOLUME IC111(1/2) IC111(2/2) L-CH R-CH(CD R) SELECT MUTE SWITCH MICON MD/V1 R-CH(PB R) Q183 INTERFACE CN101 R-CH POWER IC113(2/2) SYSTEM R-CH MUTE SECTION... -
Page 11: Power Section
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Page 12: Main Section
STR-WX7 3 7 6 3 1 5 1 5 0 4-3. PRINTED WIRING BOARD MAIN SECTION • Refer to page 9 for Circuit Boards Location. (Page 23) (Page 17) (Page 15) (Page 15) (Page 19) • Semiconductor Location Ref. No. Location... -
Page 13: Schematic Diagram Main(1/2) Section
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Page 14: Schematic Diagram Main (2/2) Section
STR-WX7 3 7 6 3 1 5 1 5 0 4-5. SCHEMATIC DIARGAM MAIN(2/2) SECTION • Refer to page 12 for Printed Wiring Board. • Refer to page 26 for IC Block Diagrams. (Page 13) (Page 13) (Page 13) -
Page 15: Schematic Diagram Av/Mic Section
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Page 16: Schematic Diagram Power Amp Section
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Page 17: Printed Wiring Board Power Amp Section
STR-WX7 3 7 6 3 1 5 1 5 0 4-9. PRINTED WIRING BOARD POWER AMP SECTION • Refer to page 9 for Circuit Boards Location. 1 3 9 4 2 2 9 6 5 1 3 (Page 23) -
Page 18: Schematic Diagram Display Section
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Page 19: Printed Wiring Board Display Section
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Page 20: Schematic Diagram Sliding Panel Section
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Page 21: Printed Wiring Board Sliding Panel Section
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Page 22: Schematic Diagram Surround Section
STR-WX7 3 7 6 3 1 5 1 5 0 4-14. SCHEMATIC DIAGRAM SURROUND AMP SECTION 1 3 9 4 2 2 9 6 5 1 3 The components identified by mark ! or dotted line with mark ! are critical for safety. -
Page 23: Printed Wiring Board Surround Section
STR-WX7 3 7 6 3 1 5 1 5 0 4-15. PRINTED WIRING BOARD SURROUND AMP SECTION • Refer to page 9 for Circuit Boards Location. (Page 17) (Page 12) 1 3 9 4 2 2 9 6 5 1 3... -
Page 24: Printed Wiring Board Trans Section
STR-WX7 3 7 6 3 1 5 1 5 0 • Refer to page 9 for Circuit Boards Location. 4-16. PRINTED WIRING BOARD TRANS SECTION 1 3 9 4 2 2 9 6 5 1 3 w w w u 1 6 3 http://www.xiaoyu163.com... -
Page 25: Schematic Diagram Trans Section
STR-WX7 3 7 63 1515 0 4-17. SCHEMATIC DIAGRAM TRANS SECTION The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. L 13942296513 u163 http://www.xiaoyu163.com... -
Page 26: Ic Block Diagrams
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Page 28: Ic Pin Function
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- Page 30 http://www.xiaoyu163.com 3 7 63 1515 0 Pin No. Pin Name Description — Ground MOTOR1 Panel motor control output MOTOR2 PANEL OPEN Panel open switch output PANEL CLOSE Panel close switch output ST. MUTE ST mute signal output STEREO Stereo detection input for tuner TUNED Tuner detection input for tuner Tuner PLL latch output...
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Page 31: Exploded Views
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Page 32: Front Panel Section
X-4951-665-1 ESCUTCHEON (L) ASSY * 62 4-932-810-11 CUSHION (FL) X-4949-994-1 ESCUTCHEON (EQ) ASSY * 63 4-900-849-01 HOLDER (FL) 4-962-708-11 EMBLEM (4-A), SONY * 64 1-669-957-11 FRONT AV BOARD 4-951-620-01 SCREW (2.6 × 8), +BVTP * 65 4-210-042-01 BRACKET (SENSOR) * 59... -
Page 33: Slide Mechanism Section
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Page 34: Circuit Boards And Back Panel Section
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Page 35: Electrical Parts List
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- Page 37 http://www.xiaoyu163.com MAIN 3 7 63 1515 0 Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks C172 1-162-291-31 CERAMIC 560PF C348 1-136-165-00 FILM 0.1uF C173 1-136-165-00 FILM 0.1uF C349 1-136-165-00 FILM 0.1uF C174 1-136-165-00 FILM 0.1uF C350 1-164-159-11 CERAMIC 0.1uF C175...
- Page 38 http://www.xiaoyu163.com MAIN 3 7 63 1515 0 Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks < DIODE > Q851 8-729-900-63 TRANSISTOR DTA124ES Q852 8-729-900-36 TRANSISTOR DTC124ES D101 8-719-911-19 DIODE 1SS119 Q853 8-729-900-36 TRANSISTOR DTC124ES D102 8-719-911-19 DIODE 1SS119 Q854 8-729-900-63 TRANSISTOR DTA124ES D131...
- Page 39 http://www.xiaoyu163.com MIC/ECHO MAIN 3 7 63 1515 0 Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks R307 1-249-433-11 CARBON 1/4W R853 1-249-429-11 CARBON 1/4W R308 1-249-433-11 CARBON 1/4W R854 1-249-397-11 CARBON 1/4W F R310 1-247-903-00 CARBON 1/4W R855 1-249-441-11 CARBON...
- Page 40 http://www.xiaoyu163.com MIC/ECHO MOTOR PANEL 3 7 63 1515 0 Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks R6008 1-249-429-11 CARBON 1/4W C521 1-162-306-11 CERAMIC 0.01uF R6009 1-247-885-00 CARBON 180K 1/4W C522 1-126-157-11 ELECT 10uF R6010 1-247-807-31 CARBON 1/4W C523 1-126-157-11 ELECT...
- Page 41 http://www.xiaoyu163.com PANEL 3 7 63 1515 0 Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks < IC > R537 1-247-807-31 CARBON 1/4W R538 1-247-807-31 CARBON 1/4W IC501 8-759-525-50 IC uPD780016AYGF-012-3BA R539 1-247-807-31 CARBON 1/4W IC502 8-759-165-82 IC PST600E-T R540 1-247-807-31 CARBON 1/4W...
- Page 42 http://www.xiaoyu163.com PANEL POWER AMP 3 7 63 1515 0 Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks R598 1-249-403-11 CARBON 1/4W F A-4419-957-A POWER AMP BOARD, COMPLETE (EXCEPT TH) R599 1-249-403-11 CARBON 1/4W F *************************** R600 1-249-403-11 CARBON 1/4W F A-4426-819-A POWER AMP BOARD, COMPLETE (TH)
- Page 43 http://www.xiaoyu163.com POWER AMP PRIMARY SECONDARY SURR AMP 3 7 63 1515 0 Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks < RESISTOR > 1-669-953-11 PRIMARY BOARD ************** R133 1-249-425-11 CARBON 4.7K 1/4W F R134 1-249-437-11 CARBPN 1/4W F 1-533-293-11 FUSE HOLDER R183...
- Page 44 STR-WX7 SURR AMP SURR SPK 3 7 63 1515 0 Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks C4053 1-162-282-31 CERAMIC 100PF 1-669-963-11 SURR SPK BOARD C4054 1-126-964-11 ELECT 10uF *************** C4055 1-126-964-11 ELECT 10uF...