Sony STRVX-500 Service manual

STR-VX500

SERVICE MANUAL

This set is the tuner and amplifier section in MHC-VX500.

SPECIFICATIONS

Amplifier section

The following measured at AC 120, 220, 240V 50/60 Hz DIN power output (Rated) (FRONT)

120 + 120W (6 Ω at 1kHz DIN)

Continuous RMS power output (Reference)

FRONT SPEAKER: 150 + 150W (6 Ω at 1kHz, 10% THD)

Inputs MD/VIDEO 1 IN (phono jacks): voltage

450/250mV, impedance 47kΩ AV INPUT AUDIO (phono jacks): voltage 250mV, impedance 47kΩ MIX MIC 1/2 (phone jack): sensitivity 1mV, impedance 10kΩ

Output 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 REAR SPEAKER: accepts impedance of 16Ω SUPER WOOFER: Voltage 1V, impedance 1kΩ

Tuner section

FM stereo, FM/AM superheterodyne tuner

FM tuner section

Tuning range 87.5 – 108.0MHz Antenna terminals 75Ω unbalanced Intermediate frequency 10.7MHz

AM tuner section

Tuning range MW: 531 – 1,602kHz (with the MW tuning

Intermediate frequency 450kHz Antenna AM loop antenna External antenna terminal

General

Power requirements 120V, 220V or 230 – 240V AC, 50/60Hz

Power consumption 290W Dimensions (w/h/d) Approx. 288 × 205 × 375mm Mass Approx. 8.6kg

E Model

interval set at 9kHz) 530 – 1,710kHz (with the MW tuning interval set at 10kHz) SW: 5.95 – 17.90MHz (with the SW tuning interval set at 5kHz)

Adjustable with voltage selector

MICROFILM

Design and specifications are subject to change without notice.

FM STEREO/FM-AM RECEIVER

TABLE OF CONTENTS

1. GENERAL ····································································· 3

2. DISASSEMBLY

2-1. Sliding Panel Assembly ······················································ 5 2-2. Level Slider ········································································ 5

3. SERVICE MODE·························································· 6

4. DIAGRAMS

4-1. Circuit Boards Location ····················································· 9 4-2. Block Diagrams

• Main Section ·································································· 10

• Power Section ································································ 11 4-3. Printed Wiring Board Main Section ······························· 13 4-4. Schematic Diagram Main (1/2) Section ························· 14 4-5. Schematic Diagram Main (2/2) Section ························· 15 4-6. Schematic Diagram Power Amp Section ······················· 16 4-7. Printed Wiring Board Power Amp Section····················· 17 4-8. Schematic Diagram Display Section ······························ 18 4-9. Printed Wiring Board Display Section ··························· 19 4-10. Schematic Diagram Sliding Panel Section ····················· 20 4-11. Printed Wiring Board Sliding Panel Section ·················· 21 4-12. Printed Wiring Board Trans Section······························· 22 4-13. Schematic Diagram Trans Section ································· 23 4-14. Schematic Diagram AV/Mic Section······························24 4-15. Printed Wiring Board AV/Mic Section ··························· 25 4-16. IC Block Diagrams ··························································· 26 4-17. IC Pin Function ································································ 29

5. EXPLODED VIEWS

5-1. Case and Sliding Panel Section ········································ 32 5-2. Front Panel Section ·························································· 33 5-3. Slide Mechanism Section ················································· 34 5-4. Circuit Boards and Back Panel Section···························· 35

6. ELECTRICAL PARTS LIST ··································· 36

SAFETY-RELATED COMPONENT WARNING !!

COMPONENTS IDENTIFIED BY MARK ! OR DO TTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

Front Panel

SECTION 1

GENERAL

es ea

3 4

ej ehqk

1 MOVIE button 2 MUSIC button 3 GAME button 4 PLACE button 5 P FILE button 6 EFFECT ON/OFF button 7 OPEN/CLOSE button 8 TUNER BAND button 9 STEREO/MONO button 0 MEMORY button qa KARAOKE PON/MIX button qs MIC LEVEL/ECHO VOL dial qd MIX MIC1 jack qf GROOVE button qg VOLUME dial qh M + button qj ENTER/NEXT button qk MULTI JOG STATION dial

ql m – button w; NON-STOP button wa EDIT button ws FLASH button wd PLAY MODE button wf REPEAT button wg PHONES jack wh LOOP button wj CLOCK/TIMER SET button wk TIMER SELECT button wl FUNCTION button e; PROLOGIC button ea DSP button es DBFB button ed DISPLAY/DEMO button ef I/1 (POWER) button eg MIX MIC2 jack eh KEY CONTROL (#) ej KEY CONTROL (2)

Rear Panel

1 SYSTEM CONTROL jack 2 ANTENNA terminal 3 REAR SPEAKER terminal 4 MONITOR OUT jack 5 FRONT SPEAKER terminal 6 MD/VIDEO 1 jack

SECTION 2

DISASSEMBLY

Note: Follow the disassembly procedure in the numerical order given.

2-1. SLIDING PANEL ASSEMBLY

Flat type cable (19 core)

Slide mechanism

Push the OPEN/CLOSE button to

open the Sliding panel assembly.

Sliding panel assembly

2-2. LEVEL SLIDER

(Perform this DISASSEMBLY after the front panel is removed.)

Screw (BVTP2.6 × 8)

Top bracket

Four screws

(BVTP2.6 × 8)

Holder (L) assembly

Screw

(BVTP2.6 × 8)

Screw (BVTP 3 × 8)

Holder level

Remove the Level slider direction of arrow.

Holder (R) assembly

NOTE FOR INSTALLATION:

Attach in the reverse order, but make sure the rollers (a, b) of the holder (L) assembly and holder (R) assembly fit into the grooves of the level slider.

Four screws (BVTP2.6 × 8)

SECTION 3

SERVICE MODE

Connections and Operations When Used Alone

Normally, use the unit connected to the HTC-VX500 as follows. Basically, when servicing the unit, connect the unit as follows.

UNIT

SYSTEM CONTROL 17P

AC IN

Even when not connected to the HTC-VX500, the unit can operate alone as it mounts a power supply (some functions will however not be available).

MC Cold Reset

• The cold reset clears all data including preset data stored in the RAM to initial conditions. Execute this mode when returning the set to the

customer.

Procedure:

1. Press three buttons EDIT , ENTER/NEXT , and DISPLAY/DEMO simultaneously.

2. The fluorescent indicator tube becomes blink instantaneously, and the set is reset.

CD Delivery Mode (This mode can be used only when the HTC-VX500 is connected.)

• This mode moves the pick-up to the position durable to vibration. Use this mode when returning the set to the customer after repair.

Procedure:

1. Press 1/1 button to turn the set ON.

2. Press LOOP button and 1/1 button simultaneously.

3. A message “LOCK” is displayed on the fluorescent indicator tube, and the CD delivery mode is set.

MC Hot Reset

• This mode resets the set with the preset data kept stored in the memory . The hot reset mode functions same as if the po wer cord is plugged

in and out.

Procedure:

1. Press three buttons REPEAT , ENTER/NEXT , and DISPLAY/DEMO simultaneously.

2. The fluorescent indicator tube becomes blink instantaneously, and the set is reset.

HTC-VX500

Sled Servo Mode (This mode can be used only when the HTC-VX500 is connected.)

• This mode can run the CD sled motor freely. Use this mode, for instance, when cleaning the pick-up.

Procedure:

1. Select the function “CD”.

2. Press three buttons FLASH , ENTER/NEXT , and KARAOKE PON/MIX simultaneously.

3. The Sled Servo mode is selected, if “CD” is blinking on the fluorescent indicator tube.

4. With the CD in stop status, press M + button move the pick-up to outside track, or – m button to inside track.

5. To exit from this mode, perform as follows:

1) Move the pick-up to the most inside track.

2) Press three buttons in the same manner as step 2.

Note:

• Always move the pick-up to most inside track when exiting from this mode. Otherwise, a disc will not be unloaded.

• Do not run the sled motor excessively, otherwise the gear can be chipped.

Change-over of FUNCTION Name

• The FUNCTION name of external input terminal can be changed over to VIDEO 1 or MD. W ith the FUNCTION selected to “MD”, about

5dB mute is applied to the input gain.

Procedure:

1. Press 1/1 button to turn the set OFF.

2. Press 1/1 button together with FUNCTION b utton, and the power is turned on, the display of fluorescent indicator tube changes to

“MD” or “VIDEO 1” instantaneously, and thus the FUNCTION is changed over.

Change-over of AM Tuner Step between 9kHz and 10kHz

• A step of AM channels can be changed over between 9kHz and 10kHz.

Procedure:

1. Press 1/1 button to turn the set ON.

2. Select the function “TUNER”, and press TUNER/BAND button to select the BAND “MW”.

3. Press 1/1 button to turn the set OFF.

4. Press ENTER/NEXT and 1/1 buttons simultaneously, and the display of fluorescent indicator tube changes to “MW step 10” or

“MW step 9”, and thus the channel step is changed over.

LED and Fluorescent Indicator Tube All Lit, Key Check Mode (Do not connect the HTC-VX500.)

Procedure:

1. Press 1/1 button to turn the set ON.

2. Press the OPEN/CLOSE button to open the sliding panel.

3. Press three buttons DELAY , ENTER/NEXT , and DISPLAY/DEMO simultaneously.

4. LEDs and fluorescent indicator tube are all turned on. Each time the MOVIE button is pressed, the fluorescent indicator tube lights up as follows: lights up completely n lights up partially 1 n lights up partially 2 n lights up completely.

5. Press GAME button, and the key check mode is activated.

6. In the key check mode, the fluorescent indicator tube displays “K @@ V0 J0”. Each time a button is pressed, “K”value decreases. However, once a button is pressed, it is no longer taken into account. (@@ means the total of buttons) “J” Value increases like 1, 2, 3 ... if rotating JOG knob in “+” direction, or it decreases like 0, 9, 8 ... if rotating in “-” direction. “V” Value increases like 1, 2, 3 ... if rotating VOLUME knob in “+” direction, or it decreases lik e 0, 9, 8 ... if rotating in “-” direction.

7. Pressing all buttons lights up the fluorescent indicator tube completely.

8. To exit from this mode, press three buttons EDIT , ENTER/NEXT and DISPLAY/DEMO simultaneously. (COLD RESET)

9. To exit from this mode, press three buttons in the same manner as step 1, or disconnect the power cord.

CD, TAPE Deck Aging Mode (This mode can be used only when the HTC-VX500 is connected.)

This mode can be used for checking the operations of the CD player and tape deck.

• When problems occur;

Aging stops, and the stopped state is displayed on the fluorescent indicator tube.

• When no problems;

Aging continues.

Preparations:

• Set the CD on the DISC1 tray.

• Insert a commercially available tape for recording (tapes which contents can be erased, etc.) in decks A and B.

Setting the aging mode:

Press the PLAY MODE button, ENTER/NEXT button, and STEREO/MONO button together. When the aging mode is set, the CD roulette mark blinks. To exit the mode, press the 1/1 button and turn OFF the power.

Sequence:

The aging mode is executed in the following sequence. If the function is set to “CD” when the aging mode is set, aging is performed starting from the CD player. When set to “TAPE A” or “TAPE B”, aging is started from deck A. If the function is set to others, aging will not be started until the function is switched to CD or TAPE.

Aging of CD player (12 minutes)

Aging of deck A

Aging of deck B

12 minutes

Display of status:

• The aging status is displayed on the fluorescent indicator tube.

• Normally, the CD player displays the remaining aging time. But if operations ended abnormally, it displays the cause.

• During the aging of the tape deck, the operations performed will be displayed. If operations ended abnormally, this will be di splayed at the

fluorescent display tube.

CD Player

• During normal operations:

Display of fluorescent indicator tube

**1-@@

**: Displays “CD” and the remaining aging time (minutes) alternately. The remaining aging time is counted down from 12.

@@: Track number being accessed.

• When operations end abnormally:

Display of fluorescent display tube

Display

NO DISC ERR FOCUS1 ERR FOCUS2 ERR GFS ERR FBIAS ERR SENSOR ERR TABLE ERR TRAY ERR

Tape Deck

Display of Operations

T APE A AG-1 T APE A AG-2 T APE A AG-3 T APE A AG-4 T APE A AG-5 TAPE B AG-1 TAPE B AG-2 TAPE B AG-3 TAPE B AG-4 TAPE B AG-5

Main Cause

DISC 1 is NO DISC from the beginning Focus is not imposed properly The focus deviated several times after the disc rotated normally GFS ERROR Error during focus bias adjustment DISC 1 was found to be NO DISC by the disc sensor The table did not rotate normally The tray containing the BD did not operate normally

Operation

T APE A REW T APE A FWD T APE A FF T APE A REV T APE A REW TAPE B REW TAPE B FWD TAPE B FF TAPE B REV TAPE B REW

Shutoff 2 minute playback 20 seconds or shutoff 2 minutes playback Shutoff Shutoff 2 minute playback 20 seconds or shutoff 2 minute playback Shutoff

Timing of Ending

Operations during aging

• Operations are performed in the following sequence during aging.

1. The CD tray rotates and disc 1 is selected.

2. Chucking is performed.

3. TOC is read.

4. Track 1 played back for 2 seconds.

5. The last track is played back for 2 seconds.

6. 1 to 5 is repeated.

7. After 12 minutes of aging, aging is switched to the tape deck.

1. The tape in deck A is rewound to the head.

2. The FWD side is played back for 2 minutes.

3. The tape is fast forwarded (FF) for 20 seconds. The following procedure is performed when the tape end is reached before the 20 seconds.

4. The REV side is played back for 2 minutes.

5. The tape is rewound to the head (REW).

6. The tape in deck B is rewound to the head.

7. The FWD side is played back for 2 minutes.

8. The tape is fast forwarded (FF) for 20 seconds. The following procedure is performed when the tape end is reached before the 20 seconds.

9. The REV side is played back for 2 minutes.

10. The tape is rewound to the head (REW).

11. Aging is switched to the CD player.

SECTION 4

MIC / ECHO board

POWER AMP board

SURR SPK board

PRIMARY board

ENCAPSULATED COMPONENT (AM/FM TUNER)

SECONDARY board

HEADPHONE board

LOADING PANEL board

DIAGRAMS

STR-VX500

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.

• When problems occur ; Aging stops and “AGING ERROR” is displayed on the fluorescent indicator tube.

• When no problems; Aging is carried out repeatedly. After 65000 times, “AGING STOP” is displayed and aging stops.

Aging Sequence

Stops for one second in the opened state

Panel open Panel close

Counts up

n n

Stops for one second in the closed state

Each time the DISPLAY/DEMO button is pressed, the display switches as follows.

Aging @@@@@ (No. of agings carried out) OP Max @.@@ (Maximum time taken for OPEN:In seconds) OP Min @.@@ (Minimum time taken for OPEN:In seconds)

4-1. CIRCUIT BOARDS LOCATION

CL Max @.@@ (Maximum time taken for CLOSE:In seconds) CL Min @.@@ (Minimum time taken for CLOSE:In seconds)

MOTOR board

FRONT AV board

PANEL board

DETECTOR board

MAIN board

STR-VX500

4-2. BLOCK DIAGRAMS

MAIN SECTION

CN101

SYSTEM

CONTROL

HTC-VX500

5 6

16 17

IIC DATA IIC CLK

AC1

AC2

R-CH(CD R)

R-CH(PB R)

R-CH(REC R)

VIDEO

IC111(1/2)

MD/V1

SELECT

SWITCH

R-CH

SPEANA

SELECTOR

IC505

42 41

AMP

BPF FILTER

SPEANA

IC506

3 60 57 58

VOLUME

IC111(2/2)

MICON

INTERFACE

32 34

123

R-CH

AMP

IC113(2/2)

SELECTOR

DBFB

IC112

MUTE

Q183

Q132

DET

D131

L-CH

S/W

MUTE

L+R

POWER SECTION

AV INPUT

(VIDEO 2)

VIDEO 1

FM/AM TUNER

TUNER UNIT IS

SUPPLIED AS

THE ASSEMBLED

BLOCK

POWER

SECTION

J6301

J101

MD/

VIDEO

AUDIO L

IN L

OUT L

COM DIN

COM DATA

ST CE

COM CLK

MUTE

STEREO

TUNED

POWER ON/OFF

AC1

AC2

VF1

VF2

ST L

FL601

FLUORESCENT

INDICATOR

TUBE

DISPLAY CONTROL

IC601

DATA

CLK

G15

S35

RESET

R-CH

AV SWITCH

Q6301

16 15 14 13

KEY

MATRIX

MULTI JOG

STATION

S653

VOLUME

S652

SLIDING SENSOR

IC504,Q513

REMOTE SENSOR

IC503

SPEANA CONT

SPEANA0

SPEANA1

AV IN

I2C DATA

I2C CLK

DATA OUT

DATA IN LAT

89 93

CLK ST MUTE

STREO

87 88

TUNED

POWER ON/OFF

FL DATA

FL CLK

FL LAT

FL RESET

KEY0

KEY3

JOG A

JOG B

VOL A

18 19

VOL B

SENSOR IN

SIRCSN

X501 5MHz

X2 X1 10 11

Y2 Z1 Z2

9 10

MASTER CONTROL

2 3 5

17 f1 16

f2 15 f3 14 f4 13 f

VACS

PRO-LOG CLK/LEVEL B

PRO-LOG DATA/LEVEL A

IC501

XT2 XT1

13 14

PANEL CLOSE

X502

32kHz

LINE

GEQ DATA

GEQ CLK GEQ LAT

DBFB B2 DBFB B1

TA MUTE

LED

RESET

ACCUT

PANEL OPEN

R-CH

3 2

5 6

82 83

84 85

D504

5 6

LED

ON/OFF

SWITCH

Q502-512

Q531-540

RESET

SWITCH

Q501

IC891

MOTOR DRIVER

PANEL

OPEN/CLOSE

S892

PANEL

LED

RESET

IC502

M891

PANEL

MOTOR

MIC AMP

IC6001(2/2)

D507

RV6001(2/2)

ECHO VOL

+5.6V

DELAY/REVERB SWITCH

DELAY LEVEL SELECT

IC402

DELAY

IC401

CLOCK

SWITCH

Q401

MUTE

SWITCH

Q121

IC6002

2 1

12 13

5 3

LPF 2 OUT

LPF 1 IN

15 10

14 11

4 9

LPF 1 IN

DELAY/REVERB

ECHO PROCESSOR

8 1

LPF 2 OUT

MIC AMP IC6001(1/2) 1

RV6001(1/2)

MIC LEVEL

• R CH: Same as L ch

• SIGNAL PATH : FM : AUDIO(AV INPUT) : MD/VIDEO : PB : VIDEO(AV INPUT)

TA MUTE

J6001

MIX

MIC 1

J6002

MIX

MIC 2

: REC : CD

1010

POWER SECTION

VIDEO

RY781

STR-VX500

J781

VIDEO OUT

MAIN

SECTION

S/W

L+R

L-CH

TA MUTE

MUTE

MUTE Q181

POWER AMP

IC901

MUTE

SWITCH

Q901

OVER LOAD

DET

Q952

OVER LOAD

SWITCH

Q851

R-CH

PROTECTOR

IC851

VCC ON

MUTE

RY751

SUPER WOOFER

R-CH

D761

D751

ST+10V

UNREG

+12V

+7V

+5.6V

D813

+5V

M901

FAN

MOTOR

ST+10V

3 1

REG

IC804

+7V REG

IC801

+5.6V REG

IC803

FAN MOTOR

REG

Q731,732

RECT

D810,811

RECT

D805-808

–

R-CH

T901

POWER

TRANSFORMER

TB201

REAR

SPEAKER

TB751

FRONT

SPEAKER

J755

PHONES

MAIN

SECTION

POWER ON/OFF

AC1

AC2

VF1

VF2

D852,853

POWER ON

MUTE

Q852

SWITCH

Q853

-7V

-B

-7V REG

IC802

VG REG

Q801

RECT D801

–

VOLTAGE

RECT

D802, 803

SELECTOR

S871

AC IN

• R CH : Same as L ch

AC1

AC2

VF1

VF2

• SIGNAL PATH

: FM

: VIDEO (AV INPUT)

1111

STR-VX500

THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.)

For schematic diagrams.

Note:

• All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums.

• All resistors are in Ω and 1/ specified.

•

• 2 : nonflammable resistor.

• 1 : fusible resistor.

• C : panel designation.

• U : B+ Line.

• V : B– Line.

• H : adjustment for repair.

• Voltages and waveforms are dc with respect to ground

• Voltages are taken with a VOM (Input impedance 10 MΩ).

• Waveforms are taken with a oscilloscope.

• Circled numbers refer to waveforms.

• Signal path.

• Abbreviation

: internal component.

The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified.

under no-signal (detuned) conditions. Voltage variations may be noted due to normal produc-

tion tolerances. Voltage variations may be noted due to normal produc-

tion tolerances.

F : FM f : AM L : AUDIO (AV INPUT) g : MD/VIDEO i : VIDEO (AV INPUT) E : PB (DECK A) G : REC (DECK B) J : CD

HK : Hong Kong model SP : Singapore model MY : Malaysia model IA : Indonesia model EA : Saudi Arabia model

W or less unless otherwise

For printed wiring boards.

Note:

• X : parts extracted from the component side.

• Y : parts extracted from the conductor side.

• p : parts mounted on the conductor side.

•

• b : Pattern from the side which enables seeing.

: Through hole.

: internal component.

• Indication of transistor

These are omitte

These are omitted

• Wavef orms DISPLAY Section

5.5Vp-p

5MHz

IC501 0 X2

5Vp-p

32.768kHz

IC501 qd XT2

1212

STR-VX500

4-3. PRINTED WIRING BOARD MAIN SECTION

• Refer to page 9 for Circuit Boards Location.

• Semiconductor

Location

HTC-VX500

Ref. No. Location

D101 B-11 D102 B-11 D131 E-9 D401 D-5 D402 D-5 D403 C-9 D751 F-11 D752 E-10 D761 E-12 D781 G-10 D801 E-4 D802 F-5 D803 E-4 D804 C-2 D805 F-4 D806 F-4 D807 F-4 D808 F-4 D810 E-4 D811 E-4 D812 C-2 D813 B-2 D851 F-8 D852 G-8 D853 G-8

21 21

IC111 C-10 IC112 E-10 IC113 E-9 IC401 E-7 IC402 D-6 IC801 B-2 IC802 C-3

IC803 B-2 IC804 D-4 IC851 G-9

Q121 B-2 Q132 D-10 Q182 E-11 Q183 E-8 Q401 D-7 Q731 G-11

Q732 G-10 Q801 C-2 Q851 G-9 Q852 H-8 Q853 H-8 Q854 G-7 Q855 G-6

1313

STR-VX500

4-4. SCHEMATIC DIAGRAM MAIN (1/2) SECTION

• Refer to page 27 for IC Block Diagrams.

1414

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