Pioneer VSX-520-K, VSX-820-K Service manual

2010

VSX-820-K

For details, refer to "Important Check Points for good servicing".

AUDIO/VIDEO MULTI-CHANNEL RECEIVER

VSX-820-K

VSX-520-K

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

Model Type Power Requirement Remarks

VSX-820-K CUXCNSM AC 120 V

VSX-520-K CUXCNSM AC 120 V

ORDER NO.

RRV4043

PIONEER CORPORATION 1-1, Shin-ogura, Saiwai-ku, Kawasaki-shi, Kanagawa 212-0031, 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

K-IZK MAR.

2010 Printed in Japan

1

1. SAFETY PRECAUTIONS

The following check should be performed for the
continued protection of the customer and service
technician.

LEAKAGE CURRENT CHECK

Measure leakage current to a known earth ground
(water pipe, conduit, etc.) by connecting a leakage
current tester such as Simpson Model 229-2 or
equivalent between the earth ground and all exposed
metal parts of the appliance (input/output terminals,
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.

ANY MEASUREMENTS NOT WITHIN THE LIMITS
OUTLINED ABOVE ARE INDICATIVE OF A POTENTIAL
SHOCK HAZARD AND MUST BE CORRECTED BEFORE
RETURNING THE APPLIANCE TO THE CUSTOMER.

2. PRODUCT SAFETY NOTICE

Many electrical and mechanical parts in the appliance

have special safety related characteristics. 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 parts which have these special safety
characteristics are identified in this Service Manual.
Electrical 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
information, always consult the current PIONEER Service
Manual. A subscription to, or additional copies of,
PIONEER Service Manual may be obtained at a nominal
charge from PIONEER.

Leakage
current
tester

Reading should
not be above

0.5 mA

Device
under
test

Test all
exposed metal
surfaces

Also test with
plug reversed
(Using AC adapter
plug as required)

Earth
ground

AC Leakage Test

(FOR USA MODEL ONLY)

WARNING

This product may contain a chemical known to the State of California to cause cancer, or birth 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.

This service manual is intended for qualified service technicians ; it is not meant for the casual do-it­yourselfer. 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.

2 3 4

SAFETY INFORMATION

A

B

C

D

E

F

2

1

2 3 4

VSX-820-K

5

[Important Check Points for Good Servicing]

In this manual, procedures that must be performed during repairs are marked with the below symbol.
Please be sure to confirm and follow these procedures.

1. Product safety

Please conform to product regulations (such as safety and radiation regulations), and maintain a safe servicing environment by
following the safety instructions described in this manual.

1 Use specified parts for repair.

Use genuine parts. Be sure to use important parts for safety.

2 Do not perform modifications without proper instructions.

Please follow the specified safety methods when modification(addition/change of parts) is required due to interferences such as
radio/TV interference and foreign noise.

3 Make sure the soldering of repaired locations is properly performed.

When you solder while repairing, please be sure that there are no cold solder and other debris.
Soldering should be finished with the proper quantity. (Refer to the example)

4 Make sure the screws are tightly fastened.

Please be sure that all screws are fastened, and that there are no loose screws.

5 Make sure each connectors are correctly inserted.

Please be sure that all connectors are inserted, and that there are no imperfect insertion.

6 Make sure the wiring cables are set to their original state.

Please replace the wiring and cables to the original state after repairs.
In addition, be sure that there are no pinched wires, etc.

7 Make sure screws and soldering scraps do not remain inside the product.

Please check that neither solder debris nor screws remain inside the product.

8 There should be no semi-broken wires, scratches, melting, etc. on the coating of the power cord.

Damaged power cords may lead to fire accidents, so please be sure that there are no damages.
If you find a damaged power cord, please exchange it with a suitable one.

9 There should be no spark traces or similar marks on the power plug.

When spark traces or similar marks are found on the power supply plug, please check the connection and advise on secure
connections and suitable usage. Please exchange the power cord if necessary.

a Safe environment should be secured during servicing.

When you perform repairs, please pay attention to static electricity, furniture, household articles, etc. in order to prevent injuries.
Please pay attention to your surroundings and repair safely.

2. Adjustments

To keep the original performance of the products, optimum adjustments and confirmation of characteristics within specification.
Adjustments should be performed in accordance with the procedures/instructions described in this manual.

4. Cleaning

For parts that require cleaning, such as optical pickups, tape deck heads, lenses and mirrors used in projection monitors, proper
cleaning should be performed to restore their performances.

3. Lubricants, Glues, and Replacement parts

Use grease and adhesives that are equal to the specified substance.
Make sure the proper amount is applied.

5. Shipping mode and Shipping screws

To protect products from damages or failures during transit, the shipping mode should be set or the shipping screws should be
installed before shipment. Please be sure to follow this method especially if it is specified in this manual.

6 7 8

A

B

C

D

5

VSX-820-K

6 7 8

E

F

3

1

2 3 4

CONTENTS

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

1. SERVICE PRECAUTIONS ....................................................................................................................................................5

A

B

C

D

E

1.1 NOTES ON SOLDERING ...............................................................................................................................................5

1.2 CAUTION........................................................................................................................................................................5

2. SPECIFICATIONS .................................................................................................................................................................6

2.1 SPECIFICATIONS...........................................................................................................................................................6

2.2 PANEL FACILITIES .........................................................................................................................................................8

3. BASIC ITEMS FOR SERVICE.............................................................................................................................................16

3.1 CHECK POINTS AFTER SERVICING..........................................................................................................................16

3.2 PCB LOCATIONS .........................................................................................................................................................17

3.3 JIGS LIST......................................................................................................................................................................19

4. BLOCK DIAGRAM...............................................................................................................................................................20

4.1 OVERALL WIRING DIAGRAM......................................................................................................................................20

4.2 OVERALL BLOCK DIAGRAM.......................................................................................................................................22

4.3 POWER SUPPLY and MAIN UCOM BLOCK DIAGRAM..............................................................................................24

5. DIAGNOSIS.........................................................................................................................................................................26

5.1 DIAGNOSIS FLOWCHART...........................................................................................................................................26

5.2 ADAPTER ERROR MESSAGE.....................................................................................................................................42

5.3 DETECTION CIRCUIT..................................................................................................................................................43

6. SERVICE MODE .................................................................................................................................................................46

6.1 SERVICE MODE...........................................................................................................................................................46

7. DISASSEMBLY....................................................................................................................................................................49

8. EACH SETTING AND ADJUSTMENT ................................................................................................................................59

8.1 HOW TO UPDATE FIRMWARE ....................................................................................................................................59

IDLE CURRENT ADJUSTMENT ..................................................................................................................................62

8.2

9. EXPLODED VIEWS AND PARTS LIST...............................................................................................................................64

9.1 PACKING SECTION......................................................................................................................................................64

9.2 EXTERIOR SECTION (VSX-820-K) .............................................................................................................................66

9.3 EXTERIOR SECTION (VSX-520-K) .............................................................................................................................70

10. SCHEMATIC DIAGRAM ....................................................................................................................................................74

10.1 INPUT ASSY...............................................................................................................................................................74

10.2 AMP ASSY..................................................................................................................................................................76

10.3 SPEAKER, HEADPHONE and MIC ASSYS...............................................................................................................78

10.4 PORTABLE, PT, HP_GUIDE, CNT1, CNT2, GUIDE_L and GUIDE_R ASSYS..........................................................79

10.5 VIDEO ASSY ..............................................................................................................................................................80

10.6 F-VIDEO, FRONT and FUNCTION ASSYS................................................................................................................82

10.7 MAIN and REG ASSYS ..............................................................................................................................................84

10.8 HDMI ASSY ................................................................................................................................................................86

10.9 DSP

ASSY (1/2)..........................................................................................................................................................88

10.10 DSP ASSY (2/2)........................................................................................................................................................90

10.11 USB ASSY (VSX-820-K ONLY).................................................................................................................................92

10.12 BT ASSY...................................................................................................................................................................94

11. PCB CONNECTION DIAGRAM ........................................................................................................................................95

11.1 INPUT ASSY...............................................................................................................................................................96

11.2 AMP ASSY..................................................................................................................................................................98

11.3 SPEAKER, HEADPHONE, MIC and PORTABLE ASSYS ........................................................................................100

11.4 PT, HP_GUIDE, CNT1, CNT2, GUIDE_L and GUIDE_R ASSYS ............................................................................102

11.5 VIDEO ASSY ............................................................................................................................................................104

11.6 F-VIDEO, FRONT and FNCTION ASSYS ................................................................................................................106

11.7 MAIN and REG ASSYS ............................................................................................................................................110

11.8 HDMI ASSY ..............................................................................................................................................................114

11.9 DSP

ASSY ................................................................................................................................................................116

11.10 USB ASSY (VSX-820-K ONLY)...............................................................................................................................118

11.11 BT ASSY.................................................................................................................................................................120

12. PCB PARTS LIST ............................................................................................................................................................121

F

4

1

2 3 4

VSX-820-K

5

• For environmental protection, lead-free solder is used on the printed circuit boards mounted in this unit.
Be sure to use lead-free solder and a soldering iron that can meet specifications for use with lead-free solders for repairs
accompanied by reworking of soldering.

• Compared with conventional eutectic solders, lead-free solders have higher melting points, by approximately 40 ºC.
Therefore, for lead-free soldering, the tip temperature of a soldering iron must be set to around 373 ºC in general, although
the temperature depends on the heat capacity of the PC board on which reworking is required and the weight of the tip of
the soldering iron.

Do NOT use a soldering iron whose tip temperature cannot be controlled.

Compared with eutectic solders, lead-free solders have higher bond strengths but slower wetting times and higher melting
temperatures (hard to melt/easy to harden).

The following lead-free solders are available as service parts:

• Parts numbers of lead-free solder:
GYP1006 1.0 in dia.
GYP1007 0.6 in dia.
GYP1008 0.3 in dia.

• Discharging

For more detail, please refer to “7. DISASSEMBLY - 1. Discharging”.

• Notes on Ground Points Connection

For more detail, please refer to “7. DISASSEMBLY - 2. Notes on Ground Points Connection”.

6 7 8

1. SERVICE PRECAUTIONS

1.1 NOTES ON SOLDERING

A

B

1.2 CAUTION

C

D

E

5

VSX-820-K

6 7 8

F

5

1

iPod cable
(L308102013010-IL)

Accessories

Remote control
(8300758300010-IL)

AM loop antenna
(E601016000010-IL)

FM wire antenna
(E605010070001-IL)

Dry cell batteries
(AAA size IEC R03) x2

Microphone (for Auto MCACC setup)
(M040000300200-IL)

2. SPECIFICATIONS

2.1 SPECIFICATIONS

2.1.1 VSX-820-K

A

B

2 3 4

C

D

E

F

6

1

2 3 4

VSX-820-K

5

Accessories

Remote control
(8300758600010-IL)

AM loop antenna
(E601016000010-IL)

FM wire antenna
(E605010070001-IL)

Dry cell batteries
(AAA size IEC R03) x2

2.1.2 VSX-520-K

6 7 8

A

B

C

D

E

5

6 7 8

VSX-820-K

F

7

1

Front panel

2.2 PANEL FACILITIES

2.2.1 VSX-820-K

A

B

2 3 4

C

D

E

F

8

1

2 3 4

VSX-820-K

Display

5

6 7 8

A

B

C

D

E

F

VSX-820-K

5

6 7 8

9

1

Remote control

A

B

2 3 4

C

D

E

F

10

1

2 3 4

VSX-820-K

5

6 7 8

A

B

C

D

E

F

VSX-820-K

5

6 7 8

11

2.2.2 VSX-520-K

Front panel

A

B

1

2 3 4

C

D

E

F

12

1

2 3 4

VSX-820-K

Display

5

6 7 8

A

B

C

D

E

F

VSX-820-K

5

6 7 8

13

1

Remote control

A

B

2 3 4

C

D

E

F

14

1

2 3 4

VSX-820-K

5

6 7 8

A

B

C

D

E

F

VSX-820-K

5

6 7 8

15

1

Item to be checked regarding video Item to be checked regarding audio

Block noise Distortion
Horizontal noise Noise
Flicker Volume too low
Disturbed image (video jumpiness) Volume too high
Too dark Volume fluctuating
Too bright Sound interrupted
Mottled color

No. Procedures Check points

1

2

3

4

5

6

7

8

Confirm whether the customer complain has been solved.
If the customer complain occurs with the particular source,
such as Dolby Digital, DTS, AAC, DVD-A and HDMI, input it for
the operation check.

The customer complain must not be reappeared.
Video, Audio and operations must be normal.

Check the analog audio playback.
(Make the analog connections with a DVD player.)

Each channel audio and operations must be normal.

Check the digital audio playback.
(Make the digital connections with a DVD player.)

Each channel audio and operations must be normal.

Check surround playback.
(Select Surround mode and check the multichannel operations
via the DSP circuit.)

Each channel audio and operations must be normal.

Check the tuner (AM and FM) operations. Audio and operations must be normal.

Check the video outputs.
(Connect with a DVD player.)

Video and operations must be normal.

Check the sound from headphone output. Sound must be normal, without noise.

Check the appearance of the product. No scratches or dirt on its appearance after receiving it for

service.

Items to be checked after servicing / VSX, SC

To keep the product quality after servicing, confirm recommended check points shown below.

See the table below for the items to be checked regarding video and audio.

2 3 4

3. BASIC ITEMS FOR SERVICE

3.1 CHECK POINTS AFTER SERVICING

A

B

C

D

E

F

16

1

2 3 4

VSX-820-K

5

NSP 1..MAIN ASSY 7025HK0916010-IL

2..MAIN ASSY 7028069111010-IL

2..PT ASSY 7028069112010-IL

2..CNT2 ASSY 7028069113010-IL

2..HEADPHONE ASSY 7028069114010-IL

2..HP_GUIDE ASSY 7028069115010-IL

2..MIC ASSY 7028069116010-IL

2..GUIDE_L ASSY 7028069117010-IL

2..GUIDE_R ASSY 7028069118010-IL

2..CNT1 ASSY 7028069119010-IL

NSP 1..VIDEO ASSY 7025HK0916013-IL

2..VIDEO ASSY 7028069141010-IL

NSP 1..FRONT ASSY 7025HK0916011-IL

2..FRONT ASSY 7028069121010-IL

2..FUNCTION ASSY 7028069122010-IL

2..F-VIDEO ASSY 7028069123010-IL

NSP 1..INPUT ASSY 7025HK0916012-IL

2..INPUT ASSY 7028069131010-IL

NSP 1..SPEAKER ASSY 7025HK0916014-IL

2..SPEAKER ASSY 7028069151010-IL

NSP 1..DSP ASSY 7025HK0916015-IL

2..DSP ASSY 7028069161010-IL

2..REG ASSY 7028069162010-IL

NSP 1..HDMI ASSY 7025HK0916018-IL

2..HDMI ASSY 7028069191010-IL

NSP 1..USB ASSY 7025HK0916016-IL

2..USB ASSY 7028069171010-IL

NSP 1..BT ASSY 7025HK0916017-IL

2..BT ASSY 7028069181010-IL

NSP 1..AMP ASSY 7025HK0916019-IL

2..AMP ASSY 7028067523010-IL

Mark No. Description Part No. Mark No. Description Part No.

LIST OF ASSEMBLIES

NOTES: - Parts marked by “NSP” are generally unavailable because they are not in our Master Spare Parts List.

-

The > mark found on some component parts indicates the importance of the safety factor of the part.

Therefore, when replacing, be sure to use parts of identical designation.

O

FRONT ASSY USB ASSY

U

R

REG ASSY

L

GUIDE_R ASSY

I

CNT1 ASSY

T

DSP ASSY

A

INPUT ASSY

S

HDMI ASSY

N

F-VIDEO ASSY

B

AMP ASSY

E

MIC ASSY

G

PT ASSY

P

FUNCTION ASSY

K

GUIDE_L ASSY

D

HEADPHONE ASSY

H

HP_GUIDE ASSY

M

VIDEO ASSY

Q

MAIN ASSY

J

CNT2 ASSYBT ASSY

VC

SPEAKER ASSY

3.2 PCB LOCATIONS

3.2.1 VSX-820-K

6 7 8

A

B

C

5

6 7 8

VSX-820-K

D

E

F

17

1

NSP 1..MAIN ASSY 7025HK0915010-IL

2..MAIN ASSY 7028069111060-IL

2..PT ASSY 7028069112010-IL

2..CNT2 ASSY 7028069113010-IL

2..HEADPHONE ASSY 7028069114010-IL

2..HP_GUIDE ASSY 7028069115010-IL

2..GUIDE_L ASSY 7028069117010-IL

2..GUIDE_R ASSY 7028069118010-IL

2..CNT1 ASSY 7028069119010-IL

2..PORTABLE ASSY 702806911A010-IL

NSP 1..VIDEO ASSY 7025HK0915013-IL

2..VIDEO ASSY 7028069141040-IL

NSP 1..FRONT ASSY 7025HK0915011-IL

2..FRONT ASSY 7028069121020-IL

2..FUNCTION ASSY 7028069122010-IL

NSP 1..INPUT ASSY 7025HK0915012-IL

2..INPUT ASSY 7028069131020-IL

NSP 1..SPEAKER ASSY 7025HK0915014-IL

2..SPEAKER ASSY 7028069151030-IL

NSP 1..DSP ASSY 7025HK0915015-IL

2..DSP ASSY 7028069161020-IL

2..REG ASSY 7028069162010-IL

NSP 1..HDMI ASSY 7025HK0915016-IL

2..HDMI ASSY 7028069191020-IL

NSP 1..BT ASSY 7025HK0916017-IL

2..BT ASSY 7028069181010-IL

NSP 1..AMP ASSY 7025HK0916019-IL

2..AMP ASSY 7028067523010-IL

Mark No. Description Part No. Mark No. Description Part No.

LIST OF ASSEMBLIES

NOTES: - Parts marked by “NSP” are generally unavailable because they are not in our Master Spare Parts List.

-

The > mark found on some component parts indicates the importance of the safety factor of the part.

Therefore, when replacing, be sure to use parts of identical designation.

FRONT ASSY

R

REG ASSY

L

GUIDE_R ASSY

I

CNT1 ASSY

T

DSP ASSY

A

INPUT ASSY

S

HDMI ASSY

B

AMP ASSY

F

PORTABLE ASSY

G

PT ASSY

P

FUNCTION ASSY

K

GUIDE_L ASSY

D

HEADPHONE ASSY

H

HP_GUIDE ASSY

M

VIDEO ASSY

Q

MAIN ASSY

J

CNT2 ASSYBT ASSY

VC

SPEAKER ASSY

O

3.2.2 VSX-520-K

A

2 3 4

B

C

D

E

F

18

1

2 3 4

VSX-820-K

5

Jigs List

Jig Name Part No. Remarks

RS-232C update jig GGF1642

Firmware update (RS-232C ↔ Rear panel)

10P to 8P FFC GGD1676

Board to board extension jig cable GGD1673 Diagnosis (DSP Assy ↔ MAIN Assy)

10P extension jig cable GGD1628 Diagnosis (AMP Assy ↔ INPUT Assy)
8P extension jig cable GGD1629 Diagnosis (AMP Assy ↔ MAIN Assy)

Lubricants and Glues List

Name Part No. Remarks

Silicon grease GEM1057 Refer to “9.2 EXTERIOR SECTION (VSX-820-K)”

and “9.3 EXTERIOR SECTION (VSX-520-K)”.

Silicon adhesive GYA1011 (KE40RTV-W) Refer to “9.2 EXTERIOR SECTION (VSX-820-K)”

and “9.3 EXTERIOR SECTION (VSX-520-K)”.

6 7 8

3.3 JIGS LIST

A

B

C

D

E

F

VSX-820-K

5

6 7 8

19

1

Q

MAIN ASSY
(7028069111010-IL: VSX-820-K)
(7028069111060-IL: VSX-520-K)

B

AMP ASSY
(7028067523010-IL)

C

SPEAKER ASSY
(7028069151010-IL: VSX-820-K)
(7028069151030-IL: VSX-520-K)

H
(

M

VIDEO ASSY
(7028069141010-IL: VSX-820-K)
(7028069141040-IL: VSX-520-K)

A

INPUT ASSY
(7028069131010-IL:
VSX-820-K)
(7028069131020-IL:
VSX-520-K)

I

CNT1 ASSY
(7028069119010-IL)

H

G

HP_GUIDE ASSY
(7028069115010-IL)

PT ASSY
(7028069112010-IL)

CN1001

N

F-VIDEO ASSY
(7028069123010-IL)

CN701

VSX-820-K ONLY

VS

VSX-520-K ONLY

VSX-820-K
ONLY

VSX-820-K

ONLY

1,2,3 PIN
4,5 PIN

CN1002

CN807

CP804

CP802

CN707

CP805

CN121B

CN121A

CN803

CN806

CP122

CP123

CP110

CP117

CP118

CP125

CN201

CP126

CN202

C

CP109CP301CN106

AC CORD
OR INLET

F

CP120

CP121

V

BT ASSY
(7028069181010-IL)

E

MIC ASSY
(7028069116010-IL)

CN502

CP801

CP502

CP501

CN501

CN601

CP128

CP107

CN202

CP203 CN401

CP404

CN201

CP403CP405

CN104

CP402

CN103

CN703

F

PORTABLE ASSY
(702806911A010-IL)

2 3 4

4. BLOCK DIAGRAM

4.1 OVERALL WIRING DIAGRAM

A

B

C

D

E

F

20

1

2 3 4

VSX-820-K

5

-

When ordering service parts, be sure to refer to "EXPLODED VIEWS and PARTS LIST" or "PCB PARTS LIST".

-

The > mark found on some component parts indicates the importance of the safety factor of the part.

Therefore, when replacing, be sure to use parts of identical designation.

-

: The power supply is shown with the marked box.

D

HEADPHONE ASSY
(7028069114010-IL)

S

HDMI ASSY
(7028069191010-IL:
VSX-820-K)
(7028069191020-IL:
VSX-520-K)

J

CNT2 ASSY
(7028069113010-IL)

VSX-820-K ONLY

VSX-820-K

ONLY

CN702

CN701

CP111

CP112

CP114

CP115

CN202

CP116

CP105

CN204

CP704

CN706

CP702

CN203

CP200 CN200

CN205

CP105

UPGRADE

CP703

CN703A

R

REG ASSY
(7028069162010-IL)

O

FRONT ASSY
(7028069121010-IL: VSX-820-K)
(7028069121020-IL: VSX-520-K)

P

FUNCTION ASSY
(7028069122010-IL)

U

USB ASSY
(7028069171010-IL)

K

GUIDE_L ASSY
(7028069117010-IL)

L

GUIDE_R ASSY
(7028069118010-IL)

CN207B

CP303

CP101

CP102CP109

CP301

FPC101

CN207A

CN702

CP703

CN802

CP802

CN807

CN805

POWER

TRANSFORMER

DSP ASSY
(7028069161010-IL:
VSX-820-K)
(7028069161020-IL:
VSX-520-K)

T

T T

1/2, 2/2

6 7 8

A

B

C

D

E

5

VSX-820-K

6 7 8

F

21

1

INPUT ASSY

BD
(VSX-820-K ONLY)

HDMI OUT

DVD(VSX-820-K)
BD(VSX-520-K)

TV/SAT(VSX-820-K)
DVD(VSX-520-K)

DVR/VCR(VSX-820-K)
TV/SAT(VSX-520-K)

73

76
67

71
69

84
82

72

75
66

70
68

64

85

83
81

65

59
63
61
79

58
62
60
78

F_AUX R

86

F_AUX L

T

INPUT ASSY

INPUT ASSY

INPUT ASSY

MAIN ASSY

MAIN ASSY

S

HDMI ASSY

U

USB
ASSY

Q

MAIN ASSY

E

MIC ASSY

DSP ASSY

V

BT ASSY

VSX-820-K
ONLY

VSX-820-K
ONLY

VSX-820-K
ONLY

VSX-520-K ONLY

F

PORTABLE ASSY

VSX-820-K
ONLY

4.2 OVERALL BLOCK DIAGRAM

A

B

C

2 3 4

D

E

F

22

1

VSX-820-K

2 3 4

D

HEADPHONE ASSY

C

SPEAKER
ASSY

G

PT ASSY

M

VIDEO ASSY

A

INPUT ASSY

MAIN ASSY

MAIN ASSY

INPUT

ASSY

VIDEO

ASSY

SPEAKER

ASSY

B

AMP ASSY

O

FRONT ASSY

N

F-VIDEO ASSY

The > mark found on some component parts
indicates the importance of the safety factor of the part.
Therefore, when replacing, be sure to use parts
of identical designation.

VSX-820-K
ONLY

VSX-820-K
ONLY

VSX-520-K
ONLY

VSX-820-K
ONLY

VSX-820-K ONLY

5

6 7 8

A

B

C

D

E

VSX-820-K

5

6 7 8

F

23

1

S4(FLT)

S3(DSP, HDMI)

AC CORD

S2(+12V,-12V)

S1(AMP B+/B-)

S4(DIR/CODEC, HDMI, USB)

MAIN TRANS

SUB TRANS

R

REG
ASSY

Q

MAIN ASSY

VSX-820-K
ONLY

2 3 4

4.3 POWER SUPPLY and MAIN UCOM BLOCK DIAGRAM

A

B

C

D

E

F

24

1

2 3 4

VSX-820-K

5

R

REG
ASSY

The > mark found on some component parts
indicates the importance of the safety factor of the part.
Therefore, when replacing, be sure to use parts
of identical designation.

INPUT ASSY

VSX-820-K ONLY

VSX-820-K ONLY

6 7 8

A

B

C

D

E

F

5

6 7 8

VSX-820-K

25

1

Step 3: Regulator IC

REG101, REG102 (Pin 3)

Is the

voltage of around

3.3 V input?

Replace REG103.

Check the ZD200 2.4 VB
and IC106.

To Step 3

To Step 4

Step 0: Preliminary confirmation

Confirm the following items before checking

Tighten screws securely.

No

Ye s

To Step 1

No

[1] DSP TROUBLESHOOTING

Step 2: Regulator IC

Check the REG101,
REG102 and MAIN Assy

Check the REG103 and
MAIN Assy.

REG103 (Pin 3)

Is the

voltage of around

5 V input?

No

Ye s

(to chassis)

ZD200 cathode

Is the

voltage of 2.5 V

output?

No

*The I/O power of DSP Assy is OK.

*The IC106 power of DSP Assy

*The DSP IC CORE power of DSP Assy

XMCK

Note: REG101, REG102 is made of
parallel connection.

REG103 (Pin 2)

Is the

voltage of 3.3 V

output?

No

Ye s

Ye s

Ye s

Is the

voltage of 1.2 V

output?

Replace REG101 and REG102.

Check the path to XTAL101.

No

Ye s

(to chassis)

(to chassis)

REG101, REG102 (Pin 2)

(to chassis)

Step 1: BtoB connector, wire

CN200,CN202,CN203,

CN204,CP105

Are the

connectors securely

inserted?

Turn the power off and
insert the connectors
securely.

No

Ye s

To Step 2

*CP105 connectors doesn't connection
in case of DSP JIG B'D use.

BtoB connector, wire

Do screws of COAX

Jack securely tighten?

OR connect GND wire of

DSP JIG B'D to chassis.

Step 4: X'tal

To Step 5

Ye s

IC109 (Pin 6, 7)

No

Is there

a 24.576 MHz

output?

Check the path to pins 6, 7 of IC109.
Replace XTAL101.

Ye s

IC102 (Pin 17)

No

Is there

a 24.576 MHz

input?

5. DIAGNOSIS

5.1 DIAGNOSIS FLOWCHART

A

2 3 4

B

C

D

E

F

26

1

VSX-820-K

2 3 4

5

Replace IC109.

Ye s

IC109 (Pin 15)

DIR_BCK (Bit clock)

No

Is there

a bit clock

output?

(0 V ⇔ 3.3 V)

Ye s

IC106 (Pin 4)

DAI_MCK (Master clock)

Is there

a master clock

output?

(0 V ⇔ 2.5 V)

Ye s

IC106 (Pin 7)

DAI_LRCK (LR clock)

Is there

a LR clock

output?

(0 V ⇔ 2.5 V)

Ye s

IC106 (Pin 9)

DAI_BCK (Bit clock)

*IC106 Pin 1
0 V : DIR

3.3 V : HDMI

Is there

a bit clock

output?

(0 V ⇔ 2.5 V)

Replace IC106.

Check the path
between IC106-pin 1
and MAIN Assy.

No

No

No

No

Is the

voltage of

IC106-pin 1

0 V?

Ye s

Switch

Step 5: DIR

Check the path to pins 10-13
of IC110 or replace IC110.

Check the path to CP105 connector.

Replace IC109.

Check the path to OUTPUT PIN of
JACK105, JACK106.

IC110 (Pins 3, 5)

OPTICAL (Pin 3: OPT2, Pin 5: OPT1)

Check that the S/PDIF signal is output.
Check that changes by pulling out and inserting the digital input lines.

Can

observe the

digital signal

?

No

(0 V ⇔ 3.3 V)

Ye s

IC109 (Pin 67)

COAX

Can

observe the

digital signal

?

No

Ye s

Ye s

Check that the data and clock signals are output.

Check that it changes in the Playback and Pause modes of
the USB (iPod).

(0 V ⇔ 3.3 V)

(0 V ⇔ 3.3 V)

(0 V ⇔ 3.3 V)

Ye s

IC109 (Pin 71)

From USB Assy

Can

observe the

digital signal

?

No

VSX-820-K ONLY

(0 V ⇔ 3.3 V)

Check the path to pins 4, 6 of
IC110 or replace IC110.

IC109 (Pins 61, 63)

OPTICAL (Pin 61: OPT2, Pin 63: OPT1)

Can

observe the

digital signal

?

No

Ye s

(0 V ⇔ 3.3 V)

Check the MAIN Assy.

IC109 (Pin 10)

DIR_MCK (Master clock)

No

No

Ye s

Is there

a master clock

output?

IC109 (Pin 16)

DIR_LRCK (LR clock)

No

Is there

a LR clock

output?

Replace IC109.

(0 V ⇔ 3.3 V)

Ye s

IC109 (Pin 14)

DIR_SDTO (Data)

No

Is there

a data

output?

Is the

voltage of PDN

IC109-pin 31

3.3 V?

Check the USB Assy.

No

To Step 6

6 7 8

A

B

C

D

5

VSX-820-K

6 7 8

E

F

27

1

Step 6: DSP output (digital)

Ye s

Digital output of each CH when inputting the digital signal with audio.

IC109 (Pin 26)

Center/LFE data

No

Is there

a data input?

Ye s

Check the path between IC102
and data & address lines.
SDRAM (IC100), FLASH ROM
(IC101)

IC109 (Pin 25)

Surround back L/R data

No

Is there

a data input?

Ye s

IC109 (Pin 27)

Surround L/R data

No

Is there

a data input?

Ye s

IC109 (Pin 18)

DSP_BCK (Bit clock)

No

Is there

a bit clock

input?

Ye s

IC109 (Pin 19)

DSP_LRCK (LR clock)

No

Is there

a LR clock

output?

Ye s

IC109 (Pin 28)

Front L/R data

No

Is there

a data input?

(0 V ⇔ 3.3 V)

(0 V ⇔ 3.3 V)

(0 V ⇔ 3.3 V)

(0 V ⇔ 3.3 V)

(0 V ⇔ 3.3 V)

(0 V ⇔ 3.3 V)

To Step 7

A

2 3 4

B

C

D

E

F

28

1

VSX-820-K

2 3 4

5

Ye s

Replace IC109.

IC109 (Pin 49)

Front R out

No

Is the output

2.5 V fixing?

Replace IC109.

Ye s

Ye s

IC109 (Pin 43)

Surround L out

No

Is the output

2.5 V fixing?

Replace IC109.

IC109 (Pin 41)

Center out

No

Is the output

2.5 V fixing?

Ye s

Replace IC109.

IC109 (Pin 39)

End

LFE out

No

Is the output

2.5 V fixing?

Ye s

Ye s

Replace IC109.

IC109 (Pin 47)

Front L out

No

Is the output

2.5 V fixing?

Replace IC109.

IC109 (Pin 45)

Surround R out

No

Is the output

2.5 V fixing?

Analog output of each CH when inputting the digital
signal (-∞ dB (no signal)).

Replace IC109.

Ye s

IC109 (Pin 43)

Surround L out

No

Is there

a audio signal

output?

Replace IC109.

Ye s

IC109 (Pin 41)

Center out

No

Is there

a audio signal

output?

Replace IC109.

Ye s

IC109 (Pin 39)

LFE out

No

Is there

a audio signal

output?

Step 7: Codec output (analog)

Analog output of each CH when inputting the digital signal with audio.

Replace IC109.

Ye s

IC109 (Pin 49)

Front R out

No

Is there

a audio signal

output?

Replace IC109.

Ye s

IC109 (Pin 47)

Front L out

No

Is there

a audio signal

output?

Replace IC109.

Ye s

IC109 (Pin 45)

Surround R out

No

Is there

a audio signal

output?

6 7 8

A

B

C

D

E

F

VSX-820-K

5

6 7 8

29

1

1. Causes for noncompletion of HDMI authentication between the source equipment and this unit
(the HDMI indicator is unlit or flashes)

[2] HDMI TROUBLESHOOTING

Causes for no display or sound from the monitor

HDMI Simple Diagnosis

Replace the HDMI cable.

NG

OK

OK

OK

Connect the source equipment
(player) to the Sink equipment
(monitor) directly.

Replace the Player.

Replace the HDMI cable.

Repare the Receiver.

Repare the Player.

NG

OK

Replace the Monitor.

Repare the Monitor.

NG

POWER ON

Confirm the following items before checking

Do

screws of COAX

jack securely

tighten?

Tighten screws securely.

No

Ye s

Source equipment:
Connect a DVD player to BD or DVD or TV or DVR.

To Step 2

To Step 1

Sink equipment:
Connect a TV to HDMI OUT.

Turn on the power of the Receiver and equipments
which was connected with HDMI.

Function switch (BD or DVD or TV or DVR)

Switch the function that HDMI was assigned.
Factory shipments setting:
For VSX-820-K
HDMI 1: BD
HDMI 2: DVD
HDMI 3: TV/SAT
HDMI 4: DVR/VCR

For VSX-520-K
HDMI 1: BD
HDMI 2: DVD
HDMI 3: TV/SAT

HDMI Troubleshooting

Step 0: Preliminary confirmation

Step 1: Connect the HDMI equipment

A

2 3 4

B

C

D

E

F

30

1

2 3 4

VSX-820-K