PIONEER VSX-50/KUXU/CA Service Manual

PIONEER VSX-50/KUXU/CA Service Manual
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Service Manual for PIONEER VSX-50/KUXU/CA, downloadable as a PDF file.

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ORDER NO.

PIONEER CORPORATION 4-1, Meguro 1-chome, Meguro-ku, Tokyo 153-8654, Japan

PIONEER ELECTRONICS (USA) INC. P.O. Box 1760, Long Beach, CA 90801-1760, U.S.A.

PIONEER EUROPE NV Haven 1087, Keetberglaan 1, 9120 Melsele, Belgium

PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 Alexandra Road, #04-01, Singapore 159936

PIONEER CORPORATION 2003

SOUND MODE

INPUT SELECTOR

MASTER

VOLUME

PHONES

ADVANCED

NEO:6

AUTO

STANDBY/ON

PULL-

OPEN

DTS

2PRO LOGICII

2DIGITAL

DOWN

VSX-50

RRV2797

AUDIO/VIDEO MULTI-CHANNEL RECEIVER

VSX-50

THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).

This product is a system(s) component.

Model

Type

Power Requirement

Remarks

VSX-50

KUXU/CA

AC120V

Component

System

Service Manual

Remarks

DVD RECEIVER

EX-500

RRV2798

AUDIO/VIDEO MULTI-CHANNEL RECEIVER

VSX-50

RRV2797

This Manual

DVD PLAYER

DV-50A

RRV2740

For details, refer to "Important symbols for good services".

T-ZZK JULY 2003 printed in Japan

VSX-50

1234

123

SAFETY INFORMATION

This service manual is intended for qualified service technicians; it is not meant for the casual

do-it-yourselfer. Qualified technicians have the necessary test equipment and tools, and have been

trained to properly and safely repair complex products such as those covered by this manual.

Improperly performed repairs can adversely affect the safety and reliability of the product and may

void the warranty. If you are not qualified to perform the repair of this product properly and safely, you

should not risk trying to do so and refer the repair to a qualified service technician.

WARNING

This product contains lead in solder and cer tain electrical par ts contain chemicals which are known to the state of California to

cause cancer, bir th defects or other reproductive harm.

Health & Safety Code Section 25249.6 Proposition 65

NOTICE

(FOR CANADIAN MODEL ONLY)

Fuse symbols

(fast operating fuse)

and/or

(slow operating fuse) on PCB indicate that replacement

parts must be of identical designation.

REMARQUE

(POUR MODÈLE CANADIEN SEULEMENT)

Les symboles de fusible

(fusible de type rapide)

et/ou

(fusible de type lent) sur CCI indiquent que

les pièces de remplacement doivent avoir la même désignation.

ANY MEASUREMENTS NOT WITHIN THE

LIMITS OUTLINED ABOVE ARE INDICATIVE

OF A POTENTIAL SHOCK HAZARD AND

MUST BE CORRECTED BEFORE RETURN-

ING THE APPLIANCE TO THE CUSTOMER.

2. PRODUCT SAFETY NOTICE

Many electrical and mechanical parts in the appliance

have special safety related character istics. These are

often not evident

from visual

inspection nor the

protection afforded by them necessarily can be obtained

by using replacement components rated for voltage,

wattage, etc. Replacement par ts which have these

special safety character istics are identified in this

Service Manual.

Electr ical components having such features are

identified by marking with a

on the schematics and

on the parts list in this Service Manual.

The use of a substitute replacement component which

does not have the same safety characteristics as the

PIONEER recommended replacement one, shown in the

parts list in this Service Manual, may create shock, fire,

or other hazards.

Product Safety is continuously under review and new

instructions are issued from time to time. For the latest

infor mation, always consult the current PIONEER

Ser vice Manual. A subscription to, or

additional copies

of, PIONEER Ser vice Manual may be obtained at a

nominal charge from PIONEER.

(FOR USA MODEL ONLY)

1. SAFETY PRECAUTIONS

The following check should be perfor med for the

continued protection of the customer and ser vice

technician.

LEAKAGE CURRENT CHECK

Measure leakage current to a known ear th ground

(water pipe, conduit, etc.) by connecting a leakage

current tester such as Simpson Model 229-2 or

equivalent between the ear th ground and all exposed

metal par ts of the appliance (input/output ter minals,

screwheads, metal overlays, control shaft, etc.). Plug

the AC line cord of the appliance directly into a 120V

AC 60 Hz outlet and turn the AC power switch on. Any

current measured must not exceed 0.5 mA.

Device

under

test

Leakage

current

tester

Earth

ground

Reading should

not be above

0.5 mA

Also test with

plug reversed

(Using AC adapter

plug as required)

Test all

exposed metal

surfaces

AC Leakage Test

VSX-50

1234

123

CONTENTS

SAFETY INFORMATION ..................................................................................................................................... 2

1. SPECIFICATIONS ............................................................................................................................................ 5

2. EXPLODED VIEWS AND PARTS LIST ............................................................................................................ 6

2.1 PACKING ................................................................................................................................................... 6

2.2 EXTERIOR SECTION................................................................................................................................ 8

2.3 INTERIOR SECTION ............................................................................................................................... 10

2.4 FRONT PANEL SECTION ....................................................................................................................... 12

3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM ..........................................................................................14

3.1 BLOCK DIAGRAM ................................................................................................................................... 14

3.1.1 AUDIO BLOCK .................................................................................................................................. 14

3.1.2 VIDEO AND POWER SUPPLY BLOCKS .......................................................................................... 16

3.2 OVERALL WIRING DIAGRAM................................................................................................................. 18

3.3 VIDEO ASSY ........................................................................................................................................... 20

3.4 AUDIO INPUT ASSY ............................................................................................................................... 22

3.5 MOTHER ASSY (1/5)............................................................................................................................... 24

3.6 MOTHER ASSY (2/5) and DSP KAWA ASSY .........................................................................................26

3.7 MOTHER ASSY (3/5)............................................................................................................................... 28

3.8 MOTHER ASSY (4/5)............................................................................................................................... 30

3.9 MOTHER ASSY (5/5)............................................................................................................................... 32

3.10 DSP ASSY (1/2)..................................................................................................................................... 34

3.11 DSP ASSY (2/2)..................................................................................................................................... 36

3.12 FRONT IN and AMP KAWA ASSYS ...................................................................................................... 38

3.13 6CH AMP ASSY .................................................................................................................................... 40

3.14 AMP OUT ASSY .................................................................................................................................... 42

3.15 ENCODER, FRONT and 1P-SW ASSYS .............................................................................................. 44

3.16 PRIMARY, D5V, 12V and VHVL ASSYS ................................................................................................ 46

3.17 FM/AM TUNER MODULE ...................................................................................................................... 48

4. PCB CONNECTION DIAGRAM ..................................................................................................................... 50

4.1 FM/AM TUNER MODULE ........................................................................................................................ 51

4.2 AUDIO INPUT and 12V ASSYS............................................................................................................... 52

4.3 MOTHER, DSP KAWA and D5V ASSYS ................................................................................................. 54

4.4 DSP ASSY ............................................................................................................................................... 58

4.5 FRONT IN ASSY...................................................................................................................................... 60

4.6 AMP KAWA ASSY ................................................................................................................................... 61

4.7 6CH AMP ASSY ...................................................................................................................................... 62

4.8 AMP OUT ASSY ...................................................................................................................................... 64

4.9 ENCODER, FRONT and 1P-SW ASSYS ................................................................................................ 66

4.10 PRIMARY ASSY .................................................................................................................................... 70

4.11 VHVL ASSY ........................................................................................................................................... 71

4.12 VIDEO ASSYS ....................................................................................................................................... 72

4.13 S-VIDEO ASSYS ................................................................................................................................... 73

5. PCB PARTS LIST ........................................................................................................................................... 74

6. ADJUSTMENT ............................................................................................................................................... 80

6.1 TUNER SECTION .................................................................................................................................... 80

7. GENERAL INFORMATION ............................................................................................................................. 81

7.1 DIAGNOSIS ............................................................................................................................................. 81

7.1.1 Test Mode .......................................................................................................................................... 81

7.1.2 Protection Circuit ............................................................................................................................... 82

7.1.3 Specifications of Speaker Detection .................................................................................................. 83

7.1.4 Circuit Description ............................................................................................................................. 84

7.1.5 Troubleshooting.................................................................................................................................. 85

7.1.6 Timing Chart ...................................................................................................................................... 87

7.2 PARTS...................................................................................................................................................... 91

7.2.1 IC ....................................................................................................................................................... 91

7.2.2 DISPLAY ............................................................................................................................................ 97

7.3 CLEANING............................................................................................................................................... 98

8. PANEL FACILITIES ........................................................................................................................................ 99

VSX-50

678

1. SPECIFICATIONS

Amplifier section

Continuous average power output of 42 watts* per

channel, min., at 6 ohms, from 20 Hz to 20,000 Hz with

no more than 0.9 %** total harmonic distortion (front).

Continuous Power Output (

STEREO mode)

Front. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 W + 42 W

(FTC 2020 kHz, THD 0.9 %, 6

)

RMS Power Output

Front. . . . . . . . . . . . . . . . . .100 W/ch (1 kHz, THD 10 %, 6

)

Center . . . . . . . . . . . . . . . . . .100 W ( 1 kHz, THD 10 %, 6

)

Surround. . . . . . . . . . . . . .100 W/ch ( 1 kHz, THD 10 %, 6

)

Surround back . . . . . . . . . . . 100 W ( 1 kHz, THD 10 %, 6

)

Audio section

Input (Sensitivity/Impedance). . . . . . . . . . . . . . .200 mV/47 k

Output (Level/Impedance)

DVR/VCR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .200 mV/2.2 k

Measured pursuant to the Federal Trade Commission's Trade

Regulation rule on Power Output Claims for Amplifiers.

Measured by Audio Spectrum Analyzer.

Video section

Input (Sensitivity/Impedance). . . . . . . . . . . . . . . .1 Vp-p/75

Output (Level/Impedance). . . . . . . . . . . . . . . . . . 1 Vp-p/75

FM tuner section

Frequency Range . . . . . . . . . . . . . . . . 87.5 MHz to 108 MHz

Usable Sensitivity. . . . . . .Mono:13.2 dBf, IHF (1.3

µV/ 75 )

50 dB Quieting Sensitivity . . . . . . . . . . . . . . .Mono: 20.2 dBf

Stereo: 38.6 dBf

Signal-to-Noise Ratio. . . . . . . . . . . .Mono: 76 dB (at 85 dBf)

Stereo: 72 dB (at 85 dBf)

Distortion. . . . . . . . . . . . . . . . . . . . . . . Stereo: 0.6 % (1 kHz)

Alternate Channel Selectivity . . . . . . . . . . . 60 dB (400 kHz)

Stereo Separation. . . . . . . . . . . . . . . . . . . . . . 40 dB (1 kHz)

Frequency Response . . . . . . . . . . . 30 Hz to 15 kHz (

±1dB)

Antenna Input (DIN). . . . . . . . . . . . . . . . . .75

unbalanced

AM tuner section

Frequency Range . . . . . 530 kHz to 1,700 kHz (10 kHz step)

Sensitivity (IHF, Loop antenna). . . . . . . . . . . . . . . .350

µV/m

Selectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 dB

Signal-to-Noise Ratio. . . . . . . . . . . . . . . . . . . . . . . . . . .50 dB

Antenna. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Loop antenna

Miscellaneous

Power Requirements . . . . . . . . . . . . . . . . . . AC 120 V, 60 Hz

Power Consumption. . . . . . . . . . . . . . . . . . . . . . . . . . . 170 W

In standby . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 W

Dimensions. . . . . . . . 16 /16 (W) x 2

/16 (H) x 15 /8 (D) in.

913

Weight (without package) . . . . . . . . . . . . . . . . . . . . . . .15 lb.

Furnished parts

Microphone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Microphone stand. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Coaxial cable (black). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Video cable (yellow). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Audio cable (black). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Stereo audio cable (red/white). . . . . . . . . . . . . . . . . . . . . . . 1

SR mini-plug cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

SR+ mini-plug cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

AM loop antenna. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

FM wire antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Power cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Dry cell batteries (AA size IEC R6P) . . . . . . . . . . . . . . . . . . 2

Remote control unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Operating instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Quick Setup Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Speaker cable labels. . . . . . . . . . . . . . . . . . . . . . . . . .1 sheet

Warranty card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Note

· Specifications and the design are subject to possible

modifications without notice, due to improvements.

Manufactured under license from Dolby Laboratories.

"Dolby", "Pro Logic", "Surround EX" and the double-D

symbol are trademarks of Dolby Laboratories.

"DTS", "DTS-ES Extended Surround", "Neo:6" and "DTS 96/

24" are trademarks of Digital Theater Systems, Inc.

FRONT

CENTER

SURROUND

BACK

SURROUND

BACK

Accessories

· Remote Control Unit

(AXD7363)

· Power Cable

(ADG7021)

· Microphone

(APM7004)

· Microphone stand

(AEB7313)

· SR+ mini-plug cable

(ADE7095)

· SR mini-plug cable

(PDE1297)

· FM wire antenna

(ADH7004)

· AM loop antenna

(ATB7009)

· Coaxial cable (black)

Audio cable (black)

(ADE7087)

· Video cable (yellow)

(VDE1055)

· Stereo audio cable

(red/white)

(VDE1054)

· Speaker cable labels

(ARW7232)

· Dry Cell Battery

(AA size IEC R6P)

(VEM1030)

DVD RECEIVER

SOURCE

RECEIVER

SYSTEM OFF

OPEN/CLOSE

RECEIVER

SLEEP

DVD

TV/SAT

DVR/VCR

FM/AM

SIGNAL

INPUT

SURROUND

ADVANCED

SURROUND

SOUND

MODE

SBch MODE

DISPLAY

DIALOG

AUTO

STEREO

SUBTITLE

ANGLE

PLAY MODE

AUDIO

MUTE

MASTER

VOLUME

DTV MENU

TOP MENU

T.EDIT

RETURN

MCACC

SETUP

HOME

TUNE

RECEIVER

SETUP

BAND

DTV ON/OFF

DISPLAY

/ +10

CLASS

MPX

D.ACCESS

ENTER

CLEAR

CH SELECT

GUIDE

TEST TONE

TV CONTROL

CHANNEL

ZOOM

SURROUND

DIMMER

CHANNEL

VOLUME

INPUT

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