PIONEER VSX-821-K, VSX-921-K, VSX-521-K User manual

2011

VSX-821-K

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

AUDIO/VIDEO MULTI-CHANNEL RECEIVER

VSX-821-K

VSX-921-K VSX-521-K

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

Model Type Power Requirement Remarks

VSX-821-K CUXCNSM AC 120 V

VSX-921-K UXCNCB AC 120 V

VSX-521-K CUXCNSM AC 120 V

ORDER NO.

RRV4167

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-IZV MAR.

2011 Printed in Japan

1

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

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.

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 120 V 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)

2 3 4

SAFETY INFORMATION

A

B

C

D

E

F

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1

2 3 4

VSX-821-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

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C

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VSX-821-K

6 7 8

E

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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 SERVICE NOTICE ..........................................................................................................................................................5

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

3. BASIC ITEMS FOR SERVICE...............................................................................................................................................9

3.1 CHECK POINTS AFTER SERVICING............................................................................................................................9

3.2 JIGS LIST........................................................................................................................................................................9

3.3 PCB LOCATIONS .........................................................................................................................................................10

4. BLOCK DIAGRAM...............................................................................................................................................................14

4.1 OVERALL WIRING DIAGRAM......................................................................................................................................14

4.2 AUDIO BLOCK DIAGRAM (for VSX-821-K, VSX-521-K)..............................................................................................16

4.3 AUDIO BLOCK DIAGRAM (for VSX-921-K)..................................................................................................................18

4.4 D-MAIN BLOCK DIAGRAM (for VSX-821-K, VSX-521-K) ............................................................................................20

4.5 D-MAIN BLOCK DIAGRAM (for VSX-921-K)................................................................................................................22

4.6 VIDEO BLOCK DIAGRAM............................................................................................................................................24

4.7 POWER SUPPLY and MAIN UCOM BLOCK DIAGRAM..............................................................................................26

5. DIAGNOSIS.........................................................................................................................................................................28

5.1 TROUBLESHOOTING ..................................................................................................................................................28

5.2 ADAPTER ERROR MESSAGE.....................................................................................................................................44

5.3 USB / iPod ERROR MESSAGE ....................................................................................................................................45

5.

4 DETECTION CIRCUIT..................................................................................................................................................46

6. SERVICE MODE .................................................................................................................................................................48

6.1 SERVICE MODE...........................................................................................................................................................48

7. DISASSEMBLY ....................................................................................................................................................................52

8. EACH SETTING AND ADJUSTMENT ................................................................................................................................62

8.1 ADJUSTMENT REQUIRED WHEN THE UNIT IS REPAIRED OR REPLACED ..........................................................62

8.2 UPDATING OF THE FIRMWARE..................................................................................................................................63

8.3 IDLE CURRENT ADJUSTMENT ..................................................................................................................................67

9. EXPLODED VIEWS AND PARTS LIST ...............................................................................................................................70

9.1 PACKING SECTION......................................................................................................................................................70

10. SCHEMATIC DIAGRAM ....................................................................................................................................................80

10.1 AUDIO ASSY ..............................................................................................................................................................80

10.2 AMP ASSY (1/2) (for VSX-921-K)...............................................................................................................................82

10.3 AMP ASSY (2/2) (for VSX-921-K)...............................................................................................................................84

10.4 AMP ASSY (1/2) (for VSX-821-K, VSX-521-K)...........................................................................................................86

10.5 AMP ASSY (2/2) (for VSX-821-K, VSX-521-K)...........................................................................................................88

10.6 M

AIN ASSY.................................................................................................................................................................90

10.7 SUBWOOFER, HEADPHONE, MIC, GUIDE L, R, WIRE GUIDE A and B ASSYS....................................................92

10.8 VIDEO ASSY ..............................................................................................................................................................94

10.9 F-VIDEO, FRONT and POWER ASSYS.....................................................................................................................96

10.10 CPU, BRIDGE A and B ASSYS ................................................................................................................................98

10.11 STANDBY ASSY .....................................................................................................................................................100

10.12 D-MAIN ASSY (1/4) ................................................................................................................................................102

10.13 D-MAIN ASSY (2/4) ................................................................................................................................................104

10.14 D-MAIN ASSY (3/4) ................................................................................................................................................106

10.15 D-MAIN ASSY (4/4) ................................................................................................................................................108

10.16 USB ASSY (VSX-821-K, VSX-921-K only) .............................................................................................................110

10.17 BT ASSY .................................................................................................................................................................112

11.

PCB CONNECTION DIAGRAM ......................................................................................................................................114

11.1 AUDIO ASSY ............................................................................................................................................................114

11.2 AMP ASSY (for VSX-921-K) .....................................................................................................................................116

11.3 AMP ASSY (for VSX-821-K, VSX-521-K) .................................................................................................................118

11.4 MAIN ASSY...............................................................................................................................................................120

11.5 SUBWOOFER, HEADPHONE and MIC ASSYS ......................................................................................................124

11.6 GUIDE L, R, WIRE GUIDE A and B ASSYS.............................................................................................................126

11.7 VIDEO ASSY ............................................................................................................................................................128

11.8 F-VIDEO, FRONT and POWER ASSYS ...................................................................................................................130

11.9 CPU ASSY ................................................................................................................................................................134

11.10 BRIDGE A and B ASSYS........................................................................................................................................138

11.11 STANDBY ASSY .....................................................................................................................................................139

11.12 D-MAIN ASSY.........................................................................................................................................................140

11.13 USB A

SSY (VSX-821-K, VSX-921-K only) .............................................................................................................144

11.14 BT ASSY .................................................................................................................................................................145

12. PCB PARTS LIST ............................................................................................................................................................146

F

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VSX-821-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".

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1. SERVICE PRECAUTIONS

1.1 NOTES ON SOLDERING

A

B

1.2 SERVICE NOTICE

C

D

E

F

VSX-821-K

5

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5

1

Amplifier section

Continuous average power output of 80 watts* per channel, min., at 8 ohms, from 20 Hz to 20 000 Hz with no more than 0.08 %** total harmonic distortion.

Front (stereo)............................................................80 W + 80 W

Power output (1 kHz, 8 Ω, 0.05 %).......................110 W per channel

Guaranteed speaker impedance

FRONT:A, B................................................................6 Ω to 16 Ω

FRONT:A+B..............................................................12 Ω to 16 Ω

SURROUND, CENTER...................................................6 Ω to 16 Ω

* Measured pursuant to the Federal Trade Commission’s Trade Regulation rule on Power Output Claims for Amplifiers ** Measured by Audio Spectrum Analyzer

Audio Section

Input (Sensitivity/Impedance)

LINE.......................................................................200 mV/47 kΩ

Output (Level/Impedance)

REC.......................................................................200 mV/2.2 kΩ

Signal-to-Noise Ratio (IHF, short circuited, A network)

LINE.....................................................................................98 dB

Signal-to-Noise Ratio [EIA, at 1 W (1 kHz)]

LINE.....................................................................................79 dB

Video Section

Signal level

Composite...............................................................1 Vp-p (75 Ω)

Component Video.............................................Y: 1.0 Vp-p (75 Ω)

PB, PR: 0.7 Vp-p (75 Ω) Corresponding maximum resolution

Component Video..................................................1080p (1125p)

Tuner Section

Frequency Range (FM)...................................87.5 MHz to 108 MHz

Antenna Input (FM).................................................75 Ω unbalanced

Frequency Range (AM).....................................530 kHz to 1700 kHz

Antenna (AM)...............................................................Loop antenna

Digital In/Out Section

HDMI terminal............................................................Type A (19-pin)

HDMI output type............................................................5 V, 100 mA

USB terminal.........................................USB2.0 Full Speed (Type A)

iPod terminal........................................USB, and Video (Composite)

SIRIUS antenna cable.......................................8-pin mini DIN cable

ADAPTER PORT terminal..............................................5 V, 100 mA

Miscellaneous

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

Power Consumption.................................................................415 W

In standby...........................................................0.4 W (Control OFF)

Dimensions....................435 mm (W) x 168 mm (H) x 362.5 mm (D)

17

3

/16 in. (W) x 65/8 in. (H) x 145/16 in. (D)

Weight (without package)......................................9.2 kg (20 lb 5 oz)

Furnished Parts

Microphone (for Auto MCACC setup)...............................................1

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

Dry cell batteries (AAA size IEC R03)..............................................2

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

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

iPod cable.........................................................................................1

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

Note

Specifications and the design are subject to possible modifications without notice, due to improvements.

VSX-821-K

iPod cable (L308102013020-IL)

Accessories

Remote control (8300762100010-IL)

AM loop antenna (E601019000010-IL)

FM wire antenna (E605010140010-IL)

Dry cell batteries (AAA size IEC R03) x2

Microphone (for Auto MCACC setup) (APM7008)

2. SPECIFICATIONS

A

2 3 4

B

C

D

E

F

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1

2 3 4

VSX-821-K

Amplifier section

Continuous average power output of 80 watts* per channel, min., at 8 ohms, from 20 Hz to 20 000 Hz with no more than 0.08 %** total harmonic distortion.

Front (stereo)............................................................80 W + 80 W

Power output (1 kHz, 8 Ω, 0.05 %).......................110 W per channel

Guaranteed speaker impedance.....................................6 Ω to 16 Ω

* Measured pursuant to the Federal Trade Commission’s Trade Regulation rule on Power Output Claims for Amplifiers ** Measured by Audio Spectrum Analyzer

Audio Section

Input (Sensitivity/Impedance)

LINE.......................................................................200 mV/47 kΩ

Output (Level/Impedance)

REC.......................................................................200 mV/2.2 kΩ

Signal-to-Noise Ratio (IHF, short circuited, A network)

LINE.....................................................................................98 dB

Signal-to-Noise Ratio [EIA, at 1 W (1 kHz)]

LINE.....................................................................................79 dB

Video Section

Signal level

Composite...............................................................1 Vp-p (75 Ω)

Component Video.............................................Y: 1.0 Vp-p (75 Ω)

PB, PR: 0.7 Vp-p (75 Ω) Corresponding maximum resolution

Component Video..................................................1080p (1125p)

Tuner Section

Frequency Range (FM)...................................87.5 MHz to 108 MHz

Antenna Input (FM).................................................75 Ω unbalanced

Frequency Range (AM).....................................530 kHz to 1700 kHz

Antenna (AM)...............................................................Loop antenna

Digital In/Out Section

HDMI terminal............................................................Type A (19-pin)

HDMI output type............................................................5 V, 100 mA

USB terminal.........................................USB2.0 Full Speed (Type A)

iPod terminal........................................USB, and Video (Composite)

SIRIUS antenna cable.......................................8-pin mini DIN cable

ADAPTER PORT terminal..............................................5 V, 100 mA

Miscellaneous

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

Power Consumption.................................................................500 W

In standby...........................................................0.4 W (Control OFF)

Dimensions....................435 mm (W) x 168 mm (H) x 362.5 mm (D)

17

3

/16 in. (W) x 65/8 in. (H) x 145/16 in. (D)

Weight (without package)......................................9.6 kg (21 lb 3 oz)

Furnished Parts

Microphone (for Auto MCACC setup)...............................................1

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

Dry cell batteries (AAA size IEC R03)..............................................2

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

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

iPod cable.........................................................................................1

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

Note

Specifications and the design are subject to possible modifications without notice, due to improvements.

VSX-921-K

iPod cable (L308102013020-IL)

Accessories

Remote control (8300762100010-IL)

AM loop antenna (E601019000010-IL)

FM wire antenna (E605010140010-IL)

Dry cell batteries (AAA size IEC R03) x2

Microphone (for Auto MCACC setup) (APM7008)

5

6 7 8

A

B

C

D

5

6 7 8

VSX-821-K

E

F

7

A

Amplifier section

Continuous average power output of 80 watts* per channel, min., at 8 ohms, from 20 Hz to 20 000 Hz with no more than 0.08 %** total harmonic distortion.

Front (stereo)............................................................80 W + 80 W

Power output (1 kHz, 8 Ω, 0.05 %).......................110 W per channel

Guaranteed speaker impedance.....................................6 Ω to 16 Ω

* Measured pursuant to the Federal Trade Commission’s Trade Regulation rule on Power Output Claims for Amplifiers ** Measured by Audio Spectrum Analyzer

Audio Section

Input (Sensitivity/Impedance)

LINE.......................................................................200 mV/47 kΩ

Output (Level/Impedance)

REC.......................................................................200 mV/2.2 kΩ

Signal-to-Noise Ratio (IHF, short circuited, A network)

LINE.....................................................................................98 dB

Signal-to-Noise Ratio [EIA, at 1 W (1 kHz)]

LINE.....................................................................................79 dB

Video Section

Signal level

Composite...............................................................1 Vp-p (75 Ω)

Component Video.............................................Y: 1.0 Vp-p (75 Ω)

PB, PR: 0.7 Vp-p (75 Ω) Corresponding maximum resolution

Component Video..................................................1080p (1125p)

Tuner Section

Frequency Range (FM)...................................87.5 MHz to 108 MHz

Antenna Input (FM).................................................75 Ω unbalanced

Frequency Range (AM).....................................530 kHz to 1700 kHz

Antenna (AM)...............................................................Loop antenna

Digital In/Out Section

HDMI terminal............................................................Type A (19-pin)

HDMI output type............................................................5 V, 100 mA

ADAPTER PORT terminal..............................................5 V, 100 mA

Miscellaneous

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

Power Consumption.................................................................415 W

In standby...........................................................0.4 W (Control OFF)

Dimensions....................435 mm (W) x 168 mm (H) x 362.5 mm (D)

17

3

/16 in. (W) x 65/8 in. (H) x 145/16 in. (D)

Weight (without package)....................................9.0 kg (19 lb 14 oz)

Furnished Parts

Microphone (for Auto MCACC setup)...............................................1

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

Dry cell batteries (AAA size IEC R03)..............................................2

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

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

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

Note

Specifications and the design are subject to possible modifications without notice, due to improvements.

VSX-521-K

Accessories

Remote control (8300761900010-IL)

AM loop antenna (E601019000010-IL)

FM wire antenna (E605010140010-IL)

Dry cell batteries (AAA size IEC R03) x2

Microphone (for Auto MCACC setup) (APM7008)

1

2 3 4

B

C

D

E

F

8

1

2 3 4

VSX-821-K

5

Items to be checked after servicing

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.

No.

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

Procedures Check points

1 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.

2 Check the analog audio playback.

(Make the analog connections with a DVD player.)

Each channel audio and operations must be normal.

3 Check the digital audio playback.

(Make the digital connections with a DVD player.)

Each channel audio and operations must be normal.

4 Check surround playback.

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

Each channel audio and operations must be normal.

5 Check the video outputs.

(Connect with a DVD player.)

Video and operations must be normal.

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

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

8 Check the appearance of the product.

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 scratches or dirt on its appearance after receiving it for service.

Jigs List

Jig Name Part No. Remarks

RS-232C update jig (Jig + 10P FFC) GGF1642

Firmware update (RS-232C ↔ Rear panel)

RS-232C cable (9-pin to 9-pin, straight cable)

9P extension jig cable (for 5 ch) GGD1739

Diagnosis (AMP Assy ↔ AUDIO Assy)

31P extension jig FFC GGD1738 Diagnosis (DISPLAY Assy ↔ CPU Assy)

Diagnosis (D-MAIN Assy ↔ CPU Assy)

Diagnosis (D-MAIN Assy ↔ BRIDGE A Assy)

13P extension jig cable (for 7 ch) GGD1740

Board to board extension jig cable GGD1733

Board to board extension jig cable GGD1734

Lubricants and Glues List

Name Part No. Remarks

Silicon grease GEM1057 Refer to "9.2 EXTERIOR SECTION (VSX-821-K, VSX-921-K)"

and "9.3 EXTERIOR SECTION (VSX-521-K)".

Silicon adhesive GYA1011

(KE40RTV-W)

Refer to "9.2 EXTERIOR SECTION (VSX-821-K, VSX-921-K)" and "9.3 EXTERIOR SECTION (VSX-521-K)".

6 7 8

3. BASIC ITEMS FOR SERVICE

3.1 CHECK POINTS AFTER SERVICING

A

B

3.2 JIGS LIST

5

6 7 8

VSX-821-K

C

D

E

F

9

1

H

GUIDE L ASSY

P

CPU ASSY

• This photo. is VSX-821-K.

VSX-821-K, VSX-921-K

T

D-MAIN ASSY

R

BRIDGE B ASSY

BRIDGE A ASSY

J

WIRE GUIDE A ASSY

N

FRONT ASSY

E

SUBWOOFER ASSY

L

VIDEO ASSY

F

HEADPHONE ASSY

U

USB ASSY

V

BT ASSY

A

AUDIO ASSY

G

MIC ASSY

M

F-VIDEO ASSY

O

POWER ASSY

I

GUIDE R ASSY

S

STANDBY ASSY

K

WIRE GUIDE B

ASSY

C

AMP ASSY

B

D

MAIN ASSY

Q

3.3 PCB LOCATIONS

A

2 3 4

B

C

D

E

F

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VSX-821-K

1

2 3 4

5

NSP 1..MAIN ASSY (VSX-821-K) 7025HK1011010-IL NSP 1..MAIN ASSY (VSX-921-K) 7025HK1014010-IL

2..MAIN ASSY (VSX-821-K) 70280702710H0-IL

2..MAIN ASSY (VSX-921-K) 70280702710G0-IL

2..SUBWOOFER ASSY 7028070272070-IL

2..GUIDE L ASSY 7028070273070-IL

2..GUIDE R ASSY 7028070274070-IL

2..WIRE GUIDE A ASSY 7028070276070-IL

2..WIRE GUIDE B ASSY 7028070277070-IL

NSP 1..AMP1 ASSY (VSX-821-K ONLY) 7025HK1011017-IL

2..AMP ASSY (VSX-821-K ONLY) 7028070241030-IL

NSP 1..AMP2 ASSY (VSX-921-K ONLY) 7025HK1014016-IL

2..AMP ASSY (VSX-921-K ONLY) 7028070251040-IL

NSP 1..BT ASSY 7025HK1009019-IL

2..BT ASSY 7028070231010-IL

NSP 1..VIDEO ASSY (VSX-821-K) 7025HK1011016-IL NSP 1..VIDEO ASSY (VSX-921-K) 7025HK1014017-IL

2..VIDEO ASSY (VSX-821-K) 7028070261060-IL

2..VIDEO ASSY (VSX-921-K) 7028070261070-IL

NSP 1..CPU ASSY (VSX-821-K) 7025HK1011011-IL NSP 1..CPU ASSY (VSX-921-K) 7025HK1014014-IL

2..CPU ASSY (VSX-821-K) 7028070221030-IL

2..CPU ASSY (VSX-921-K) 7028070221070-IL

2..BRIDGE A ASSY 7028070222070-IL

2..BRIDGE B ASSY 7028070223070-IL

2..STANDBY ASSY (VSX-821-K) 7028070225030-IL

2..STANDBY ASSY (VSX-921-K) 7028070225070-IL

NSP 1..FRONT ASSY (VSX-821-K) 7025HK1011013-IL NSP 1..FRONT ASSY (VSX-921-K) 7025HK1014013-IL

2..FRONT ASSY 7028070211050-IL

2..POWER ASSY 7028070212050-IL

2..MIC ASSY 7028070213050-IL

2..F-VIDEO ASSY 7028070214050-IL

2..HEADPHONE ASSY 7028070215050-IL

NSP 1..AUDIO ASSY (VSX-821-K) 7025HK1011014-IL NSP 1..AUDIO ASSY (VSX-921-K) 7025HK1014011-IL

2..AUDIO ASSY (VSX-821-K) 7028070181030-IL

2..AUDIO ASSY (VSX-921-K) 7028070181050-IL

NSP 1..USB ASSY 7025HK1014012-IL

2..USB ASSY 7028070201050-IL

NSP 1..D-MAIN ASSY (VSX-821-K) 7025HK1011012-IL NSP 1..D-MAIN ASSY (VSX-921-K) 7025HK1014018-IL

2..D-MAIN ASSY (VSX-821-K) 7028070191030-IL

2..D-MAIN ASSY (VSX-921-K) 7028070191050-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.

6 7 8

A

B

C

D

E

F

VSX-821-K

5

6 7 8

11

A

NSP 1..MAIN ASSY 7025HK1012010-IL

2..MAIN ASSY 70280702710D0-IL

2..SUBWOOFER ASSY 7028070272050-IL

2..GUIDE L ASSY 7028070273070-IL

2..GUIDE R ASSY 7028070274070-IL

2..WIRE GUIDE A ASSY 7028070276070-IL

2..WIRE GUIDE B ASSY 7028070277070-IL

NSP 1..AMP1 ASSY 7025HK1011017-IL

2..AMP ASSY 7028070241030-IL

NSP 1..BT ASSY 7025HK1009019-IL

2..BT ASSY 7028070231010-IL

NSP 1..VIDEO ASSY 7025HK1011016-IL

2..VIDEO ASSY 7028070261060-IL

NSP 1..CPU ASSY 7025HK1012011-IL

2..CPU ASSY 7028070221020-IL

2..BRIDGE A ASSY 7028070222070-IL

2..BRIDGE B ASSY 7028070223070-IL

2..STANDBY ASSY 7028070225030-IL

NSP 1..FRONT ASSY 7025HK1012013-IL

2..FRONT ASSY 7028070211020-IL

2..POWER ASSY 7028070212050-IL

2..MIC ASSY 7028070213020-IL

2..HEADPHONE ASSY 7028070215050-IL

NSP 1..AUDIO ASSY 7025HK1011014-IL

2..AUDIO ASSY 7028070181030-IL

NSP 1..D-MAIN ASSY 7025HK1012012-IL

2..D-MAIN ASSY 7028070191020-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.

H

GUIDE L ASSY

N

FRONT ASSY

G

MIC ASSY

P

CPU ASSY

VSX-521-K

T

D-MAIN ASSY

R

BRIDGE B ASSY

BRIDGE A ASSY

J

WIRE GUIDE A ASSY

V

BT ASSY

E

SUBWOOFER ASSY

O

POWER ASSY

F

HEADPHONE ASSY

I

GUIDE R ASSY

S

STANDBY ASSY

K

WIRE GUIDE B

ASSY

A

AUDIO ASSY

L

VIDEO ASSY

C

AMP ASSY

D

MAIN ASSY

Q

1

2 3 4

B

C

D

E

F

12

1

2 3 4

VSX-821-K

5

6 7 8

A

B

C

D

E

F

VSX-821-K

5

6 7 8

13

1

Q

BRIDGE A ASSY (7028070222070-IL)

V

BT ASSY (7028070231010-IL)

T

( 1/4- 4/4)

T

(VSX-821-K:7028070191030-IL) (VSX-921-K:7028070191050-IL)

A

AUDIO ASSY (VSX-821-K/521:702807018030 (VSX-921-K:702807018050-IL)

E

SUBWOOFR ASSY (VSX-821-K/921:7028070272070-IL)

(VSX-521-K:7028070272050-IL)

(VSX-521-K:7028070191020-IL)

B

AMP ASSY (7ch) ( 1/2, 2/2)

B

(VSX-921-K:7028070251040-IL)

POWER ASSY

O

(7028070212050-IL)

F-VIDEO ASSY

M

(VSX-821-K/921:7028070214050-IL

FRONT ASSY

N

(VSX-821-K/921:7028070211050-IL) (VSX-521-K:7028070211020-IL)

HEADPHONE ASSY

F

(

7028070215050-IL

)

MIC ASSY

G

(VSX-821-K/921:7028070213050-IL) (VSX-521-K:7028070213020-IL)

D

MAIN ASSY

(VSX-821-K: 70280702710H0-IL) (VSX-921-K: 70280702710G0-IL) (VSX-521-K: 70280702710D0-IL)

S

STANDBY ASSY

(VSX-821-K/521:7028070225030-IL)

(VSX-921-K:7028070225070-IL)

C

AMP ASSY (5ch) ( 1/2, 2/2) (VSX-821-K/521:7028070241030-IL)

D-MAIN ASSY

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

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.

1.FLAC

2.FLCT

3.FLAC

4

3

5 6

1

4

3

5

1

2.AGND

1.HP_L

3.HP_R

CN2

123

12

34

2

910..

2.NC

4.NC

5.SR

4.SL

3.C

1.FL

. .

2

. 2 1

11

. .

2

16

14.AGND

11.BT_L

9.BT_R

10.AGND

6.AGND

4.AGND

2.AGND

. .

2

14

9..2

3.-6.8V

.

17

16

1

. .

15

14

1

4

51

2

4

2

..

12 8

CP304

2

6

2

1

..

89

123

1910..

1.AC

5.AC

12

2.FR

1

34

5

4

5

CP2

.

10

1

17

12.AGND

8.AGND

1

15

.

2

CP702

9.HDMI+12V

7.PDN

8.STBY_RLY

5.CPU_+3.3V

3.FLAC

4.GNDU

1.FLAC

1 2 3

3.GNDU

4.INPUT_DN

5.ST_H+5V

6.POWER_LED

1.STBY_KEY

3.FL2

1.FL1

CP701

CN721

1

CP403

CP405

CN3

2.NC

3.SBR

10.PREGND

9.HIGHGND

5.-HIGHB

6.-HIGHB

7.HIGHGND

4.-HIGHB

1.+HIGHB

2.+HIGHB

CP1

3.GND

(S1)

1

1.FL

2.FR

3.C

CP402

CN1

17.TUNER_+5V

14.TUNER_SEN

12.TUNER_SCLK

13.TUNER_SDIO

8.BT_DET

9.BT_TX

10.BT_RX

3.SIRIUS_P/E

5.BT_ON/CE

6.BT_+5V

4.U/DGND

1.SIRIUS_RX

(SW)

9.BT_TX

10.BT_RX

11.BT_/OC

7.BT_ID

6.BT_+5V

15.SIRIUS_R

13.SIRIUS_L

2.AGND

3.BT_L

CP603

(BT)

(SW)

5.TUNER_R

10

1.SW_MUTE

CP601

9.MIC_DET

10.MIC_SEL

7.GNDA

5.GNDA

6.PORTABLE_L

10

1.+6.8V

2.GNDA

16.GPIO2/INT

17.+5V(TUNER)

14./SEN

13.SDIO

12.SCLK

9.BT_RX

8.BT_DET

10.BT_TX

5.BT_ON/OFF

3.SIRIUS_P/E

4.U/DGND

6.+5V(BT)

1.SIRIUS_RX

(MAIN)

14.AGND

15.SIRIUS_R

13.SIRIUS_L

(MAIN)

10.AGND

11.BT_L

8.AGND

9.BT_R

6.AGND

5.TUNER_R

4.AGND

2.AGND

1.SW_MUTE

CN601

3

18.GNDA

15.SW_OU

13.C_OUT

14.GNDA

8.GNDA

9.SR_OU

10.GNDA

6.GNDA

4.GNDA

5.FR_OU

2.GNDA

1.AIN_R

6.CPU_ST_VCC

2.FLCT

9

2.INPUT_UP

2

(S5)

4.H/P DETECT

2

1.SBL

8.HIGHGND

(MAIN)

3.+HIGHB

(MAIN)

4.SL

5.SR

3

(MAIN)

16.TUNER_INT

15.TUNER_RST

11.BT_OC

7.BT_ID

2.SIRIUS_TX

CP602

8.BT_DET

7.TUNER_L

11

3.SW_OUT

1.BT_R

4.CPU_GND

5.BT_ON/CE

8.MICOUT

4.PORTABLE_R

15./RST

7.BT_ID

11.BT_OC

2.SIRIUS_TX

CP6

12.AGND

CP5

7.TUNER_L

3.SW_OUT

CN209 (BRIDGE_A)

16.GNDA

11.SL_OU

12.GNDA

7.FL_OU

3.AIN_L

CN702

CP701

3.GNDU

6.POWER_LED

5.ST_H+5V

4.INPUT_DN

1.STBY_KEY

9.HDMI+12V

7.PDN

5.CPU+3.3V

6.CPU_ST_VCC

2.FLCT

10.PREGND

8.HIGHGND

5.-HIGHB

6.-HIGHB

7.HIGHGND

3.+HIGHB

1.+HIGHB

2.+HIGHB

(S1)

11.BT_/OC

9.BT_TX

10.BT_RX

6.BT_+5V

7.BT_ID

5.BT_ON/CE

3.BT_L

2.AGND

1.BT_R

CN901

3

17.SBR_O

19.SBL_O

8.STBY_RLY

2.INPUT_UP

4.GNDU

9.HIGHGND

4.-HIGHB

(S2)

(S3,4)

(MAIN)

8.BT_DET

4.CPU_GND

1

5

(921

AC CORD or INLET

MAIN TRANS

2 3 4

4. BLOCK DIAGRAM

4.1 OVERALL WIRING DIAGRAM

A

B

C

D

E

F

14

1

2 3 4

VSX-821-K

L

VIDEO ASSY (VSX-821-K/521:7028070261060-IL) (VSX-921-K:7028070261070-IL)

1/4- 4/4)

T

R

BRIDGE B ASSY (7028070223070-IL)

P

CPU ASSY

(VSX-821-K: 7028070221030-IL)

(VSX-921-K: 7028070221070-IL)

(VSX-521-K: 7028070221020-IL)

H

GUIDE L ASSY (7028070273070-IL)

I

GUIDE R ASSY (7028070274070-IL)

J

WIRE GUIDE A ASSY (7028070276070-IL)

U

USB ASSY

(VSX-821-K/921:7028070201050-IL)

K

WIRE GUIDE B ASSY (7028070277070-IL)

4

51

2

4.GNDA

2.GNDV

3.-6.8V

4

1

2

1

10

.

2

1

.

23.+12V

24.HP_R

26.HP_L

19.GNDA

20.GNDA

21.-12V

17.GNDA

15.GNDA

9.GNDA

5.GNDA

13.SBR

11.SBL

9.FR

5.C

1.FL

3.SL

.

11.MIC

2

.

. .

19

. 2 1

27

6.-6.8V

8.GNDA

1.HP_L

3.HP_R

4.+6.8V

5.+12V

10.F-VR

18.BT_L

CP2

.

12 10..13

8.AGND

9.FR

2.AGND

3.SL

4.AGND

5.C

3.DGND

2.12V

3.DGND

4.DGND

2

2 3

1

123

1234

. .

2

1

12

3.+12V

.

CP8

10

16

2

.

1

.

10

CP9

4

10.+5V

4.GNDV

2.GNDA

. .

27

.

2

1

3

29

28

.

1 2

11

10

1 2

2

1

.

28

1

10

1

.

27

.

1

.

5

1

2

.

11

.

534

8.BT_R

7.GNDA

22.GNDA

3.GNDA

1

7.SR

1

CP803

CP17

.

26

5.GNDA

12.F-VL

7.-12V

CP3

(S2)

3

1

6.AGND

7.SR

1.FL

2.NC

1.SPDIF

1.12V

3

CN801

1

4

CN5

CN1

CN2

4.+12V

17

9

11

9.Y_IN

11.-5V

2.GNDD

.

CN704A

31

.

2

29

CN203

11

2

.

1

2

123

5

CN212 CN205

(921/821 ONLY)

1.GND-USB

2.GND-USB

3.USB_SPDIF

CN802

CP1302

CN207

CN208

CN601

3

18.GNDA

15.SW_OUT

13.C_OUT

14.GNDA

8.GNDA

9.SR_OUT

10.GNDA

6.GNDA

4.GNDA

5.FR_OUT

2.GNDA

1.AIN_R

16.GNDA

11.SL_OUT

10.GNDA

12.GNDA

7.FL_OUT

6.GNDA

8.GNDA

2.GNDA

3.AIN_L

4.GNDA

19

2.HPGND

CP400

1.HP_L

CP721

CP901

(BRIDGE_B)

(D-MAIN) CP1305

2.USB_RDY

3.USB_TX/RXD

4.USB_RX/TXD

CN703

10.GNDA

8.GNDA

6.GNDA

4.GNDA

CN211

2.GNDA

10

18

(AUDIO)

16.SB_MUTE

17.SW_SUM

18.VOL_CLK

12.Z2_MUTE

13.MIC_MUTE

14.REC_MUTE

6.-6.8V

7.PORTABLE_R

8.GNDA

1.HP_L

2.HPGND

3.HP_R

25.HPGND

14.SIRIUS_R

16.VIDEO_L

CP401

(AUDIO)

10.BT_L

11.GNDA

12.SIRIUS_L

2

4.TUNER_R

6.TUNER_L

26

1.SW_MUTE

2.SW_OUT

5.U_PWR_ON

2.USB-RDY

1.RESET#

3.UART-TX/RXD

(S3,4)

16.SB_MUTE

17.SW_SUM

18.VOL_CLK

11.MIC

12.Z2_MUTE

13.MIC_MUTE

14.REC_MUTE

7.PORTABLE_R

2.HPGND

2.HP_FL

1.MUTE_B+

6.AGND

4.HP_FR

11.AGND

9.AGND

15.AGND

14.SIRIUS_R

13.GNDA

19.AGND

17.AGND

24.TUNER_R

23.AGND

22.TUNER_L

27.SW_MUTE

26.SW_OUT

13.SBR

CP401

10.AGND

..

(MAIN)

4

4.+12V

3.+12V

1.DGND1

(D-MAIN)

4.DGND1

2.+12V

1.+12V

17.COMP_DET

14.GNDD

15.CVBS_IN

13.CR_IN

17

11.CB_IN

10.GNDD

9.Y_IN

. .

9

10

5.CR_OUT

7.CV_OUT

6.GNDD

2.GNDD

1.Y-OUT

11

8.OSD_CLK

9.U/DGND

10.+5V

4.NJW1327_SCL

5.OSD_RST

6.OSD_CE

1.F_VIDEO

2.GNDD

(MAIN)

3

2.DGND2

1.DGND2

14.GNDD

15.CVBS_IN

16.CVBS_DET

10.GNDD

11.CB_IN

12.GNDD

(MAIN)

6.GNDD

8.GNDD

7.CVBS_OUT

2.GNDD

1.Y-OUT

3.CB_OUT

(MAIN)

8.OSD_CLK

9.U/DGND

5.OSD_RST

6.OSD_CE

4.NJW1327_SCL

1.F_VIDEO

3

(D-MAIN)

31 .

2

CP404

3.ASO_DET

4.RADI_DET

(CPU)

1.DC_DET4

27.HDMI_5V

28.GND-H

29.THRU_LED

24.4588_PDN

25.DSD_SEL

20.DSP_SCL

21.DSP_SDA

22.4588_SCL

17.DSP_CS

18.DSP_SDOUT

19.DSP_RST

14.SUB_ON

15.HDMI_SEL

11.SUB_PDN

12.MAIN_IRQ

7.CSCK_MAIN

8.SCDO_MAIN

9.SCDI_MAIN

4.CPU_ST_VCC

5.ST_H+5V

6.RX_MUTE

1.GNDU

2.GNDU

CN404

CP204

9.REC_MUTE

10.MIC_MUTE

11.Z2_MUTE

6.SW_SUM

7.SB/Z2_MUTE

2.MIC_SEL

3.MIC_DET

4.VOL_DATA

CP16

CP14

15.DC_DET

16.FL-30V

17.GNDU

14.NC

11.S_RLY

12.C_RLY

10.SB_RLY

7.MUTE_B+

8.H/P_RLY

6.GNDU

4.TUNER_SDIO

3.TUNER_SEN

2.TUNER_RST

9.BT_/OC

6.BT_DET

5.BT_ID

7.BT_RX

2.SIRIUS_RX/TXD

3.SIRIUS_P/E

1.SIRIUS_TX/RXD

8.DC_TRG+12V

9.AGND

6.OSD_CLK

4.OSD_CE1

5.OSD_DATA

2.1327_SCL

1.1327_SDA

8.GNDV

9.CVBS_IN

10.CVBS_DET

3.Y_IN

4.GNDV

5.CB_IN

1.+5V

CN209 (BRIDGE_A)

16.GNDA

11.SL_OUT

12.GNDA

7.FL_OUT

3.AIN_L

18.GNDA

14.GNDA

13.C_OUT

9.SR_OUT

5.FR_OUT

1.AIN_R

4.H/P DET

3.HP_R

2

5.U_PWR_ON

1.USB_RST

12.GNDA

13

CP402

15.AMUTE

10.GNDA

5.GNDA

9.PORTABLE_L

19.VOL_DATA

4.+6.8V

27.MUTE_B+

13.GNDA

18.VIDEO_R

27

1

4.UART-RX/TXD

15.AMUTE

10.GNDA

9.PORTABLE_L

19.VOL_DATA

2

(D-MAIN)

16.SIRIUS_L

8.AGND

3.GND_HP

25.AGND

21.AGND

20.BT_R

11.SBL

12.AGND

2.DGND1

CP1304

3.DGND1

16.CVBS_DET

12.GNDD

921 9P

ONLY

16

4.GNDD

8.GNDD

3.CB_OUT

11.-5V

10

3.NJW1327_SDA

7.OSD_DATA

CN6

17.COMP_DET

13.CR_IN

921 9P

ONLY

5.CR_OUT

4.GNDD

7.OSD_DATA

3.NJW1327_SDA

CN1304

(CPU)

2.DC_DET3

5.TRTHER_DET

CN204

23.4588_SDA

26.HDMI+12V

10.SUB_RST

13.SUB_IRQ

16.DSP_RDY

3.CPU_ST_VCC

4

1.HP_DET

5.VOL_CLK

8.A_MUTE

CP11

CP12

13.F_RLY

9.SPK_FH/B_RLY

5.TUNER_SCLK

1.TUNER_INT

8.BT_TX

4.BT_ON/OFF/CE

7.H+5V

3.OSD_RST1

6.GNDV

11.COMP_DET

7.CR_IN

2.GNDV

CN201

921 ONLY

3.VIDEO_R

19.SBL_OUT

15.SW_OUT

17.SBR_OUT

CN210

10.MIC_SEL

7.GNDA

6.POT_L

(BRIDGE_B)

4.POT_R

2.GNDA

17.SBR_OUT

19.SBL_OUT

(BRIDGE_B)

CP1303

(MAIN)

5.TR_THERMAL

4.RADI_THERMAL

3.ASO_DET

1.DC_DET4

5.VIDEO_V

1.VIDEO_L

(MAIN)

(CPU)

(BRIDGE_B)

(CPU)

10.GNDV

11.+5V

6.GNDV

7.CB_IN

2.CVBS_DET

3.CVBS_IN

1.COMP_DET

(VIDEO)

4.GNDV

(VIDEO)

1.VIDEO_L

5.VIDEO_V

(921/821 ONLY)

(BRIDGE_A)

9.MIC_DET

8.MICOUT

5.GNDA

1.+6.8V

(AUDIO)

CN400

2.DC_DET3

CP7

3.VIDEO_R

(921/821 only)

CN704B

(921/821:31P 521:27P)

5.CR_IN

8.GNDV

9.Y_IN

(AUDIO)

5

6 7 8

A

B

C

5

6 7 8

VSX-821-K

D

E

F

15

1

U

USB ASSY (VSX-821-K only)

M

F-VIDEO ASSY (VSX-821-K only)

N

FRONT ASSY

A

AUDIO ASSY

D

MAIN ASSY

F

HEADPHONE ASSY

G

MIC ASSY

V

BT ASSY

2 3 4

4.2 AUDIO BLOCK DIAGRAM (for VSX-821-K, VSX-521-K)

A

B

C

D

E

F

16

VSX-821-K

1

2 3 4

5

D

MAIN ASSY

C

AMP ASSY

D

MAIN ASSY

E

SUBWOOFER ASSY

6 7 8

A

B

C

D

E

F

VSX-821-K

5

6 7 8

17

1

U

USB ASSY

M

F-VIDEO ASSY

N

FRONT ASSY

A

AUDIO ASSY

D

MAIN AS

F

HEADPHONE ASSY

G

MIC ASSY

BT ASSY

V

Not used

2 3 4

4.3 AUDIO BLOCK DIAGRAM (for VSX-921-K)

A

B

C

D

E

F

18

VSX-821-K

1

2 3 4

5

D

MAIN ASSY

B

AMP ASSY

D

MAIN ASSY

E

SUBWOOFER ASSY

6 7 8

A

B

C

D

E

F

VSX-821-K

5

6 7 8

19

1

T

D-MAIN ASSY

VSX-821 only

2 3 4

4.4 D-MAIN BLOCK DIAGRAM (for VSX-821-K, VSX-521-K)

A

B

C

D

E

F

20

1

2 3 4

VSX-821-K

5

6 7 8

A

B

C

D

E

F

VSX-821-K

5

6 7 8

21

1

T

D-MAIN ASSY

2 3 4

4.5 D-MAIN BLOCK DIAGRAM (for VSX-921-K)

A

B

C

D

E

F

22

1

2 3 4

VSX-821-K

5

6 7 8

A

B

C

D

E

F

VSX-821-K

5

6 7 8

23

1

1K

UP-Cr

COMP2-Cr

COMP1-Cb

OSD

COMP1-Y

FRONT-V

VIDEO

TV/SAT

NJW1327

2V

1K

1V(0dB) 1K

2V 75

1K

DET.

COMP1-Cr

UP-Cb

COMP2-Cb

UP-Y

COMP2-Y

OSD

DVR

DVD

2V

1K

1V(0dB)

1V(0dB) 1K

2V 75

2V

1K

2V 75

2V

75

NM

2V 75

DET.

COMPONENT & CVBS SELECT

L

VIDEO ASSY

VSX-921 only

VSX-921, VSX-821

only

4.6 VIDEO BLOCK DIAGRAM

A

B

2 3 4

C

D

E

F

24

1

2 3 4

VSX-821-K

5

1K

75

1K

DET.

75

1K

75

1K

75

NM

75

DET.

6 7 8

A

B

C

D

E

VSX-821-K

5

6 7 8

F

25

1

S4(FLT)

S4(USB)

S3(DSP, HDMI)

AC CORD

S2(+12V,-12V)

S1(AMP B+/B-)

MAIN TRANS

SUB TRANS

VSX-921/821 only

D

MAIN ASSY

S

STANDBY ASSY

Not use

2 3 4

4.7 POWER SUPPLY and MAIN UCOM BLOCK DIAGRAM

A

B

C

D

E

F

26

1

2 3 4

VSX-821-K

5

P

CPU ASSY

Not used

6 7 8

A

B

C

D

E

F

VSX-821-K

5

6 7 8

27

1

Step 0: Preliminary confirmation

CP1306,CN1304,CP1305,CP1304,CN1303

To Step 1

Are the connectors

securely inserted?

Step 1: Fixed board

Confirm the following items before checking

To Step 2

Tighten screws securely.

Do screws of chassis back

securely tighten?

Ye s

B to B connector, wire

Note1: CN1304-using the model VSX-921/40/826 Note2: CN1303-using the model VSX-921/40/826/821

Note: Refer to "3.4 How to cancel the status after detection of the DC error " of [6.1.3] .

Ye s

No

Step 2: Power supply

CP1304 (pins 1, 2)

IC1306 (pin 2)

Is the voltage 12 V?

Check the wire between D-MAIN and MAIN Assys.

Is the voltage of 12 V input?

Is the voltage 3.3 V output?

Is pin 6 (en) of IC1306 high?

Is the voltage of 1.2 V output?

Is it the VSX-921, 826, 40?

Ye s

IC1306 (pins 7, 8)

REG1302 (pin 2)

Check the IC1324 DSP power pin (cvdd and dvdd): cvdd: 1.2 V, dvdd: 3.3 V.

Ye s

DSP +3.3V line is OK.

OK

Ye s

No OK

Check the IC1306 and its peripheral circuits.

Check the peripheral circuits or the SUB CPU (IC1316).

No

Check the IC1324 DSP power pin (cvdd and dvdd) and its peripheral circuits or must be replaced IC1324, REG1302.

No

Replace IC1306.

NG

Replace IC1306.

OK

Check the MAIN Assy.

Go to Step 3.

No

Go to [2] DSP TROUBLESHOOTING below.

Check which error is detected and diagnosis the circuit.

No

12 V input

(to chassis)

Note1: IC1306 - using the model VSX-921/40/826 Note2: IC1306 - non using the model VSX-821/521/421

[2] DSP TROUBLESHOOTING

[1] No Power

TROUBLESHOOTING FOR ALL DESTINATION

Does the unit power on

at the moment when canceling

DC error detection?

5. DIAGNOSIS

5.1 TROUBLESHOOTING

A

2 3 4

B

C

D

E

F

28

1

VSX-821-K

2 3 4

Ye s

Step 3: Power supply

IC1305 (pin 2)

IC1305 (pins 7,8)

Check the IC1324 DSP power pin (cvdd & dvdd): cvdd : 1.2 V, dvdd : 3.3 V

Is the voltage of 12 V input?

Check the IC1305 and its peripheral circuits.

Is the voltage 3.3 V output?

Is pin 6 (en) of IC1305 high?

Is the voltage of 1.2 V output?

Ye s

REG1302 (pin 2)

+3.3V line of D-MAIN Assy is OK

OK

Check the IC1318 power pin (dvdd, avdd, PVDD) : dvdd: 5 V, avdd: 5 V, PVDD: 5 V

Ye s

HDMI+5V line is OK

OK

Check the IC1303 HDMI power pin (avcc12) : avcc : 1.2 V

Ye s

+3.3V line of D-MAIN Assy is OK

OK

No

Check the IC1324 DSP power pin (cvdd & dvdd) and its peripheral circuits or must be replaced IC1324, REG1302.

No

Check the peripheral circuits or the SUB CPU (IC1316).

No

OK

Ye s

Check the IC1325 and its peripheral circuits.

No

Replace IC1325.

NG

Ye s

Check the peripheral circuits or the SUB CPU (IC1316).

No

Replace IC1305.

OK

Replace IC1305.

OK

Replace IC1305 or Check the MAIN Assy.

12 V input

Step 4: Power supply

CP1304 (pins 1, 2)

IC1325 (pin 2)

IC1325 (pins 7, 8)

Is the voltage 12 V?

Check the wire between D-MAIN and MAIN Assys.

Is the voltage of 12 V input?

Is the voltage 5 V output?

Is pin 6 (en) of IC1325 high?

No OK

Check the MAIN Assy.

12 V input

(to chassis)

Is the voltage of 1.2 V output?

IC1300 (pin 2)

Check the IC1303 HDMI POWER pin (avcc33, avcc12) and its peripheral circuits or must be replaced IC1303, IC1300.

No

(to chassis)

5

6 7 8

A

B

C

D

E

F

VSX-821-K

5

6 7 8

29

A

Ye s

Step 5: X'tal

IC1318 (pins 6, 7)

IC1324 (pin 17)

Is there a 24.576 MHz

output?

Check the IC1318 and its peripheral circuits. or replace XTAL1300.

No

Ye s

Is there a 24.576 MHz

input?

Check the IC1318 and its peripheral circuits or replace XTAL1300.

No

XMCK

To Step 6

Ye s

Step 6: DIR

IC1319 (pins 3, 5)

IC1318 (pins 61, 63)

IC1318 (pin 67)

IC1318 (pin 71)

Can observe the

digital signal?

Check the path to output pin of JACK1305, JACK1306.

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

No

Ye s

Can observe the

digital signal?

Check the IC1319 and its peripheral circuits or replace IC1319.

Can observe the

digital signal?

Can observe the

digital signal?

Ye s

No

Check the path to pins 8 to 11 of IC1319 or replace IC1319.

Check that it changes in the playback and pause modes of the USB (iPod).

Ye s

Check that the data and clock signals are output.

No

Check the path to CP1303 connector.

No

Check the USB Assy.

61: opt1 63: opt2

coax

from USB Assy

3: opt1 5: opt2

(0 V ↔ 3.3 V)

B

1

2 3 4

C

D

E

F

30

1

VSX-821-K

2 3 4

5

Ye s

No

Check the IC1318 and its peripheral circuits of IC1319.

No

Check the IC1322 and its peripheral circuits of IC1322.

OK

Check the CP1306.

No

Check the CPU Assy.

OK

Replace IC1318, IC1322.

OK

Replace IC1318, IC1322.

Replace IC1322.

OK

IC1318 (pin 10)

IC1318 (pin 16)

Ye s

IC1318 (pin 14)

Ye s

IC1318 (pin 15)

IC1322 (pin 4)

IC1322 (pin 7)

IC1322 (pin 9)

Is there a master clock

output?

Is the voltage of PDN IC1318

pin 31 3.3V?

Is there a LR clock

output?

Is there a DATA output?

Is there a master clock

output?

Ye s

Is there a LR clock output?

Is there a bit clock output?

Is the voltage of IC1322

pin 1 0 V?

Is there a bit clock output?

DIR_MCK (master clock)

DIR_LRCK (LR CLOCK)

DIR_SDTO (DATA)

DIR_BCK (bit clock)

DAI_MCK (MASTER CLOCK)

DAI_LRCK (LR CLOCK)

DAI_bck (bit CLOCK)

*IC1322 pin 1 0 V: DIR

3.3 V: HDMI

SWITCH

(0 V ↔ 3.3 V)

Check the IC1318 and its peripheral circuits of IC1319.

No

Check the path between IC1322 pin 1 and CPU Assy.

No

Replace IC1318.

OK

Check the IC1318 and its peripheral circuits of IC1319.

Check the IC1322 and its peripheral circuits of IC1322.

No

OK

To Step 7

6 7 8

A

B

C

D

E

F

VSX-821-K

5

6 7 8

31

1

Ye s

Step 7: DSP output (digital)

IC1318 (pin 18)

IC1318 (pin 19)

Is there a bit clock input?

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

Is there a LR clock

output?

Is there a data input?

Ye s

IC1318 (pin 28)

IC1318 (pin 27)

Ye s

IC1318 (pin 26)

Ye s

IC1318 (pin 25)

Ye s

DSP_BCK (BIT CLOCK)

DSP_LRCK (LR CLOCK)

front L/R data

surround L/R data

CENTER/LFE data

surround back L/R data

(0 V ↔ 3.3 V)

To Step 8

No

Check the path between IC1324 and data & address lines. SDRAM (IC1321), FLASH ROM (IC1323).

A

2 3 4

B

C

D

E

F

32

VSX-821-K

1

2 3 4

5

Ye s

Step 8: CODEC output (ANALOG)

IC1318 (pin 49)

IC1318 (pin 47)

Is there a audio signal

output?

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

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

Ye s

Is there a audio signal

output?

front R out

front L out

IC1318 (pin 45)

Ye s

Is there a audio signal

output?

surround R out

IC1318 (pin 43)

Ye s

Is there a audio signal

output?

surround L out

IC1318 (pin 43)

surround L out

IC1318 (pin 41)

Ye s

Is there a audio signal

output?

center out

Ye s

IC1318 (pin 41)

center out

IC1318 (pin 39)

Ye s

Is there a audio signal

output?

LFE out

Ye s

IC1318 (pin 39)

LFE out

IC1318 (pin 49)

Ye s

Is the output 2.5 V fixing?

front R out

IC1318 (pin 47)

Ye s

Is the output 2.5 V fixing?

front L out

IC1318 (pin 45)

Ye s

Is the output 2.5 V fixing?

surround R out

End

No

Replace IC1318.

6 7 8

A

B

C

D

VSX-821-K

5

6 7 8

E

F

33

1

Cause for noncomplection of HDMI authentication between the source equipment and this unit. (the HDMI indicator is unlit or flasher)

Causes for no display or sound from the monitor

[3] HDMI TROUBLESHOOTING

Replace the HDMI cable.

NG

OK

Replace the HDMI cable.

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

OK

Repare the Receiver.

NG

Replace the Player.

OK

Repare the Player.

NG

Replace the Monitor.

OK

Repare the Monitor.

HDMI Troubleshooting

HDMI Simple Diagnosis

Step 0: Preliminary confirmation

Confirm the following items before checking

To Step 1

Do screws of chassis back

securely tighten?

To Step 2

Tighten screws securely.

Ye s

No

Step 1: Connect the HDMI equipment

Source equipment: Connect a dvd player to VIDEO or BD or DVD or DVR/BDP.

Sink equipment: Connect a TV to HDMI OUT

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

Switch the function that HDMI was assigned. Factory shipments setting: HDMI1: DVR/BDR HDMI2: DVD HDMI3: BD HDMI4: VIDEO1

Function switch (VIDEO or BD or DVD or DVR/BDP)

POWER ON

A

2 3 4

B

C

D

E

F

34

1

2 3 4

VSX-821-K

Step 2: Power supply

CP1306 (pin 14)

IC1315 (pin 4)

CP1306 (pins 10, 11)

Is the voltage 0 to 3.3 V?

Is the voltage 3.3 V?

Is the voltage 12 V?

Is the voltage 5 V?

Is pin 6 (en) of IC1325

high?

Ye s

Is +3.3 V output voltage?

Ye s

CP1304 (pins 1, 2)

Ye s

CP1304 (pins 1, 2)

Ye s

IC1305 (pins 7, 8)

Ye s

Q1318 (collector)

Ye s

IC1325 (pins 7, 8)

Ye s

Is pin 5 of IC1315

an above 6 V?

Ye s

Check the parts and pattern in the path. (CP306 pin 4)

Check the parts and pattern in the path. Replace Q1318,Q1319.

No

Replace IC1315.

Replace IC1325.

Replace IC1305.

Replace Q1318.

Ye s

No

Diagonose the CPU Assy.

No

Diagonose the CPU Assy.

No

Diagonose the SUB CPU (IC1316).

No

Is pin 6 (en) of IC1305

high?

Ye s

Check the parts and pattern in the path of Q1318, Q1319 etc.

Ye s

No

Diagonose the SUB CPU (IC1316).

No

Q1318 base voltage

is 2.6 V?

No

Q1318 collector voltage

is 0 V? (base is 3.3 V)

No

Diagonose the MAIN Assy.

Is the voltage 12 V?

Is the voltage 3.3 V?

No

Diagonose the MAIN Assy.

SUB_ON

3.3 V input

HDMI_12V

HDMI_5V

HDMI_3.3V

ABT1015 3.3V

A

5

6 7 8

A

B

C

D

5

VSX-821-K

6 7 8

E

F

35

1

IC1310 (pin 3)

Is the voltage 3.3 V?

Is the voltage 1.8 V?

Is IC1310 abnormally hot?

IC1310 (pin 2)

Ye s

Check the parts and pattern in the path.

The output and GND may be short-circuited. Check the path between them.

Replace IC1310.

No

Check the parts and pattern in the path.

Diagonose the MAIN Assy.

No

Check the parts and patterns in the path IC706.

No

Is IC1300 abnormally hot?

Ye s

Replace IC1300.

No

HDMI 3.3V

CP1306 (pin 10)

Is the voltage 0 to 3.3 V?

Diagonose the MAIN Assy.

No

Diagonose the MAIN Assy.

No

Diagonose the MAIN Assy.

No

Is the voltage 0 to 3.3 V?

Is there a data input?

(0 to 3.3 V)

Is there a data output?

(0 to 3.3 V)

Is there a data input?

(0 to 3.3 V)

Diagonose the MAIN Assy.

No

Is there a data input?

(0 to 3.3 V)

SUB_RESET

SUB_PDN

HDMI 1.8V

IC1300 (pin 3)

Is the voltage 1.2 V?

Ye s

IC1300 (pin 2)

Ye s

CP1306 (pin 11)

Ye s

CSCK_MAIN

CP1306 (pin 7)

Ye s

SCDO_MAIN

CP1306 (pin 8)

Ye s

MAIN_IRQ

CP1306 (pin 12)

Ye s

SUB_IRQ

CP1306 (pin 13)

Ye s

HDMI 3.3V

HDMI 1.2V

A

B

To Step 3

Step 3: Diagnosis

Each data lines confirmation checks it after standby off/on.

A

2 3 4

B

C

D

E

F

36

1

VSX-821-K

2 3 4

CP1306 (pin 9)

Is there a data output?

(0 to 3.3 V)

Ye s

Check the parts and patterns in the path IC1316.

No

Is the voltage 0 to 3.3 V?

Is there a data 0 to 3.3 V?

Ye s

Check the parts and patterns in the path pin 87 of IC1316.

No

Check the parts and patterns in the path pin 89 of IC1316.

No

Check the parts and patterns in the path pin 56 of IC1316.

No

Replace IC1316 or X1303.

Replace IC1303 or X1300.

No

SCDI_MAIN

IC1303 (pin 21)

HR_RST

ADV_RST

Is the voltage 0 to 3.3 V?

Check the parts and patterns in the path pin 59 of IC1316.

No

Check the path to pin 13 of IC1316. Replace IC1316.

No

Check the path to pin 4 of IC1303. Replace IC1303.

Check the path to pin 1,2,6,7 of IC1312. Replace IC1312 or XTAL1300.

No

Check the path to pin 22 of IC1302. Replace IC1302.

No

Replace IC1302 or X1301.

No

Is the voltage 0 to 3.3 V?

IC1308 (pin 25)

Ye s

IC1302 (pin 51)

ABT_RST

Ye s

IC1311 (pin 63)

Ye s

IC1316 (pin 15)

Is there a 16 MHz output?

IC1316 (pin 13)

Ye s

IC1303 (pin 5)

Ye s

IC1303 (pin 4)

Ye s

IC1311 (pin 7)(921,40,826)

Ye s

IC1302 (pin 21)

Ye s

IC1302 (pin 22)

Is there a 27 MHz output?

Is there a 28.63636 MHz

output?

Is there a 28.63636 MHz

output?

B

Step 4: X'TAL

To Step 4

Ye s

To Step 5

5

6 7 8

A

B

C

D

VSX-821-K

5

6 7 8

E

F

37

1

* when connected the equipment to IN1 (VIDEO):

+5V_R3

Check the JACK1303. If JACK1303 is failure, replace JACK1303.

JACK1302 (pin 18)//+5V_R2//IN2 (BD) JACK1301 (pin 18)//+5V_R1//IN3 (DVD) JACK1300 (pin 18)//+5V_R0//IN4 (DVR/BDR)

No

Check the JACK1303. If JACK1303 is failure, replace JACK1303.

No

(0 to 5 V)

Check the JACK1303 and IC1303. If JACK1303 or IC1303 failure, replace JACK1303 or IC1303.

No

Repeat

Ye s

JACK1302 (pin 18)//+5V_R2//IN2 (BD) JACK1301 (pin 18)//+5V_R1//IN3 (DVD) JACK1300 (pin 18)//+5V_R0//IN4 (DVR/BDR)

Ye s

JACK1303 (pin 18)

Is the voltage 5 V?

HPD_SINK

HPD3

Ye s

JACK1303 (pin 19)

Is the voltage 5 V?

Is the voltage 5 V when

selecting IN3?

Step 5: INPUT/OUTPUT Diagnosis

Step 6: Hot Plug Detect

Ye s

To Step 6

Ye s

To Step 7

Repeat

SDA (HDMI_OUT)

Check the JACK1304 and IC1308. If JACK1304 or IC1308 is failure, replace JACK1304 or IC1308.

No

Check the JACK1304 and IC1308. If JACK1304 or IC1308 is failure, replace JACK1304 or IC1308.

No

Check the IC1308 and IC1303. If IC1308 or IC1303 is failure, replace IC1308 or IC1303.

No

Repeat

Ye s

IC1308 (pin 47)

Does a signal output

in constant period

(0 to 5 V)?

Does a signal output

in constant period

(0 to 5 V)?

SCL (HDMI_OUT)

SDA _SINK

IC1308 (pin 46)

Ye s

Is there a same signal

as IC1308-pin 24

(0 to 3.3 V)?

Check the IC1308 and IC1303. If IC1308 or IC1303 is failure, replace IC1308 or IC1303.

No

Check the IC1308 and JACK1303. If IC1308 or JACK1303 is failure, replace IC1308 or JACK1303.

No

Check the IC1308 and JACK1303. If IC1308 or JACK1303 is failure, replace IC1308 or JACK1303.

No

Is there a same signal

as IC1308-pin 23

(0 to 3.3 V)?

IC1308 (pin 49)

SCL_SINK

Ye s

IC1308 (pin 48)

SDA3 (HDMI IN1(VIDEO))

Ye s

IC1303 (pin 44)

SCL3 (HDMI IN1(VIDEO))

Ye s

IC1303 (pin 43)

Is there a same signal

as IC1308 pin 49 when

selecting IN1?

(0 to 5 V)

Is there a same signal

as IC1308 pin 48 when

selecting IN1?

Step 7: SDA /SCL

C

A

2 3 4

B

C

D

E

F

38

1

2 3 4

VSX-821-K

SDA (ABT)

COMP_DET

Check the line and IC1308, RESET (63_H). If IC1311 is failure, replace IC1311.

No

Turn the power off and insert the wire securely.

No

Check the line and IC1308, RESET (63_H). If IC1311 is failure, replace IC1311.

No

Check the line and IC1308, RESET (51_H). If IC1302 is failure, replace IC1302.

No

Ye s

IC1311 (pin 61)

Does a signal output

in constant period

(0 to 3.3 V)?

Ye s

Does a signal output

in constant period

(0 to 3.3 V)?

Does a signal output

in constant period

(0 to 3.3 V)?

SCL (ABT)

IC1311 (pin 62)

SDA (DECODER)

IC1302 (pin 53)

Ye s

SCL (DECODER)

TMDS OUTPUT

IC1302 (pin 54)

Check the line and IC1308, RESET (51_H). If IC707 is failure, replace IC1302.

No

Does a signal output

in constant period

(0 to 3.3 V)?

Ye s

C

To Step 8

Ye s

To Step 9

Ye s

Yes (3.3 V)

CN1304

IC1316 (pin 55)

IC1302 (pins 36, 47, 48, 49, 50)

Are the connectors

securely inserted?

Does a signal output

in constant period

(WAVE)?

Check the line and IC1316. If IC1316 is failure, replace IC1316.

Check the line and IC1302. If IC1302 is failure, replace IC1302. IC1302 (pin 36 (CVBS), 47 (CR), 48 (CB), 49 (Y), 50 (SOY))

No

(0 V)

Does a signal output

in constant period

(0 to 3.3 V)?

Step 8: ANALOG UP

Check the IC1308 or IC1303. If IC1308 or IC1303 is failure, replace IC1308 or IC1303.

No

Ye s

IC1308 (pins 30,31,33,34,36,37,39,40)

Are there signals

(approx. 0.5 Vp-p)

IN all lines?

Step 9: TMDS

End

5

6 7 8

A

B

C

D

E

F

VSX-821-K

5

6 7 8

39

1

Step 0: Preliminary confirmation

Confirm the following items before checking

To Step 1

Do screws of USB Assy

securely tighten?

Ye s

[4] iPod TROUBLESHOOTING

Tighten screws securely.

No

OK

Step 1: Power supply

CN801 (pins1, 2)

IC806 (pin 2)

Is the voltage 12 V?

Is the voltage 5 V output?

Is pin 6 (en) of IC806 high?

Is the voltage of 5V input?

Is the voltage 3.3 V output?

Is the voltage of 12 V input?

Ye s

Check the wire between USB and MAIN Assys.

No

12 V input

IC806 (pins 7, 8)

Ye s

REG2 (pin 3)

Ye s

Check the IC806 and its peripheral circuits.

No

Is REG2 abnomally hot?

No No

(to chassis)

REG2 (pin 2)

Ye s

3.3 V output

Check the pattern in the path.

No

The output and GND may be short-circuited. Check the path between them.

Check the IC806 and its peripheral circuits. (CP803 pin 5)

No

Check the MAIN Assy.

OK

Replace IC806.

OK

Replace IC806.

Replace REG2.

D

A

2 3 4

B

C

D

E

F

40

1

2 3 4

VSX-821-K

Is the voltage 5 V?

Is the voltage 1.8 V output?

Is REG1 abnomally hot?

Is pin 4 (en) of IC805 low?

Ye s

No

5 V input

1.8 V output

The output and GND may be short-circuited. Check the path between them.

REG1 (pin 3)

REG1 (pin 2)

Ye s

Is the voltage 5 V input?

Is the voltage 5 V output?

No

Is pin 8 (fault) of IC805 high?

No

Ye s

OK

Ye s

Ye sYe s

5 V input

IC805 (pins 2, 3)

USB bus power

IC805 (pins 6, 7)

Check the pattern in the path.

No

Check the parts and pattern in the path of CN801.

No

DATA and ADDRESS lines between SDRAM (IC803), FLASH ROM (IC802), and IC801 are may not be connected.

Check the CN704B of CPU Assy and CN704A of FRONT Assy.

Check the parts and pattern in the path. Replace XTAL1, etc..

Operation of IC801 is OK. Go to step 3.

D+ and D- should have waveform during normal condition. Check the pattern in the path of IC801. etc..

No

Check the pattern in the path.

No

Replace REG1.

Replace IC805.

D

To Step 2

Step 2: Operation of USB Media Control IC

IC801 (pins 54, 55)

CN802 usb_rx,tx (pins 4, 5)

Ye s

JACK801 (pins 2, 3)

IC801 (pin 44) -> IC803 (pin 38)

Is there a 12 MHz output?

CP803 pins 1, 2 (reset,rdy)

is high?

Are there the waveforms

like figure?

After turning the power on and

several seconds later,does SDCLK

change 12 MHz to 80 MHz?

No

usb_rx and usb_tx should be high during operation. Check the pattern in the path of FRONT and CPU Assys.

No

Check the path to CPU Assy.

NG

xin/xout

initial communication [SDCLK]

Do usb_rx and usb_tx

communication

with main micom?

Fig. D+

X: 1 μS/div, Y: 2 V/div

Fig. D-

5

6 7 8

A

B

C

5

VSX-821-K

6 7 8

D

E

F

41

1

Ye s

OK

Check the path between IC801 (pin 120).

Replace IC804.

Operation of IC804 is OK. Go to step 4.

Step 3: Operation of iPod (Authentication process)

IC804 (pins 12, 13)

Do scl and sda

communicate?

Does reset_auth

(pin 4) reset it?

High after the reset.

No

When scl and sda are normal operation = high (3.3 V) connect iPod, and communicate it about 10 seconds later (authentication starts). And communicate i

t about 60 seconds later (authentication is complete).

scl, sda (I2C between IC801 and IC804)

Ye s

Refer to "[1] DSP TROUBLESHOOTING."

Check the path between IC801 (pin 105).

Check the parts and pattern CN802 and IC801.

Replace IC801.

Step 4: Audio out check

CN802 (pin 1)

Is there a S/PDIF signal?

No NG

S/PDIF output

A

2 3 4

B

C

D

E

F

42

1

2 3 4

VSX-821-K

5

Step 0: Preliminary confirmation

Confirm the following items before checking

To Step 1

Do screws of PLATE_SCREW

securely tighten ?

Ye s

To Step 2

Ye s

[5] BT (Bluetooth) TROUBLESHOOTING

Tighten screws securely.

No

OK

Step 1: BT_DET

CP603 (pin 8)

Is the voltage 0 V?

OK

Check the pattern in the path and SUBWOOFER Assy.

Check the pattern in the path and MAIN and CPU Assys.

No

5 V input

Check the pattern in the path.

Check the SUBWOOFER Assy.

Check the pattern in the path and MAIN and CPU Assys.

Check the pattern in the path and SUBWOOFER Assy.

Check the pattern in the path and MAIN and CPU Assys.

To Step 3

Ye s

To Step 2

Ye s

Step 2: Power supply

CP603 (pin 6)

Is the voltage 5 V?

Is there any loose connection

CN602, CP602 of

SUBWOOFER Assy?

No

To Step 4

Ye s

Step 3: BT_ID

CP603 (pin 7)

Is the voltage 0.7 to 1.2 V?

No

bt_rx and bt_tx should be high during operation. Check the pattern in the path of SUBWOOFER Assy.

bt_rx and bt_tx should be high during operation. Check the pattern in the path of MAIN and CPU Assys.

To Step 5

Ye s

Step 4: Communication

CP603 bt_rx,tx (pins 9, 10)

Do bt_rx and bt_tx

communication

with main micom?

No

Ye s

Check the MAIN, CPU and AUDIO Assys.

OK

Step 5: Audio out check

CP603 (pins 1, 3)

Is there a audio signal?

No

6 7 8

A

B

C

D

E

F

VSX-821-K

5

6 7 8

43

1

Functional Name

Adapter port overcurrent detection

Outline

When the BT adapter is inserted in Adapter port, turn off the power of the Adapter port forcibly when it detects an overcurrent. And display ERROR state in FL.

Explain Operation Detail

For detection method

• Confirm a detection port at intervals of 20 msec to 50 msec (*2), and judge it as an overcurrent when you detected an error consecutively three times.

*2 It is assumed that it is fixed value of the 20 msec to 50 msec degree.

*1 Return the "ADP ERR" display to the normal display if you change it into other FUNCTION only in the APAPTER PORT FUNCTION. Also display "ADP ERR" if the ADAPTER PORT FUNCTION is ERROR state.

Basic Operation

Front Key Sequence

Change

Character Display Time (sec.)

Icon Display

(FL)

LED Display

A

*1

When the overcurrent is detected

The display continues until the power is turned off.

Check it after turning the power once off then back on again, and it becomes the normal operation if normal.

D P E R R

12 12345678

2 3 4

5.2 ADAPTER ERROR MESSAGE

A

B

C

D

E

F

44

1

2 3 4

VSX-821-K

5

Functional Name

iPod ERROR MESSAGE

Outline

Error message is displayed at abnormality time.

Basic Operation

Front Key Sequence Change OSD display Time (sec) FL Display

I

The communication error iPod/USB communication error

Generation error

/U ERR1

I/U ERR2

Loading error

I/U ERR3

OverHeat error

I/U ERR4

No Track Caution

N OTRACK

5.3 USB / iPod ERROR MESSAGE

6 7 8

A

B

C

D

E

F

VSX-821-K

5

6 7 8

45

1

[1] Overload and DC Protection Circuit

P

CPU ASSY

CB

AMP ASSY

CB

AMP ASSY

D

MAIN ASSY

2 3 4

5.4 DETECTION CIRCUIT

A

B

C

D

E

F

46

1

2 3 4

VSX-821-K

5

[2] TEMP Protection Circuit

P

CPU ASSY

CB

AMP ASSY

CB

AMP ASSY

6 7 8

A

B

C

D

5

VSX-821-K

6 7 8

E

F

47

1

[1] Display mode for numbers of protection detections

[Purpose]

[Basic operations]

FL Display Description of IndicationsKey Operation

(STANDBY state)

[PRESET –] + [STANDBY/ON] keys (Initial display)

[ENTER] key

(Initial display)

5 (-> normal) *1

Number of DC error detections

Number of OVERLOAD error detections

Number of abnormal-temperature

error detections

Time (sec.)

The numbers of detections for various protection processes are displayed.

*1 "5 (-> normal)" denotes that the display will return to the normal indication when no key operation is performed for 5 seconds. *2 Variable range: 0 to 255

[How to enter/exit]

During Standby mode, simultaneously press and hold the [PRESET –] and [STANDBY/ON] keys for 2 seconds to enter this mode. The display will return to the normal indication when no key operation is performed for 5 seconds.

Counter

*2

The above-mentioned Display mode is available only when the product operates properly.

If any protection function is activated while the product is in use, the product cannot be turned ON and enter the above Display mode. In such a case, cancel the protection function, referring to “3.4 How to cancel the status after detection of the DC error." If a protection function is activated immediately after the previous protection function is canceled, cancel that protection function again then enter STBY mode immediately. You can then see the error logs, following the above procedures, until a next protection function is activated.

2 3 4

6. SERVICE MODE

6.1 SERVICE MODE

A

B

C

D

E

F

48

1

2 3 4

VSX-821-K

5

[2] Reset mode for numbers of protection detections

[Purpose]

[Basic operations]

FL Display Description of IndicationsKey Operation

(STANDBY state)

[ALC/STANDARD SURR] + [STANDBY/ON] keys (press and hold the keys for 10 seconds.)

(Counter Clear end)

[ENTER] key

(Normal display)

5 (-> normal) *1

usually

*2

Time (sec.)

For clearing all the counts of protection detections. (This mode resets the counts of protection detections.)

1. When the procedures for Reset mode for numbers of protection detections are completed, all the counters will be reset to "000."

2. Prohibitions: The protection detection counts cannot be cleared (reset to 000) with the MEMORY CLEAR process. They can only be cleared when the procedures of Reset mode are completed.

*1 "5 (-> normal)" denotes that the display will return to the normal indication when no key operation is performed for 5 seconds. *2 Indication when the BD function is selected

[How to enter/exit]

During Standby mode, simultaneously press and hold the [ALC/STANDARD SURR] and [STANDBY/ON] keys for 10 seconds to enter this mode. The display will return to the normal indication when no key operation is performed for 5 seconds.

[Detailed explanations]

6 7 8

A

B

C

D

E

F

VSX-821-K

5

6 7 8

49

1

[3]

The unit’s operation when a error is detected

[Purpose]

[Basic operations]

FL Display Description of IndicationsKey Operation

3.1 DC (AMP is abnormality) error detection

(Normal display)

(DC detection)

(Auto)

(RECEIVER POWER OFF)

usually

*1, *2

Normal display

Time (sec.)

• The unit’s operation when a DC/OVER/TEMP error is detected is described here.

• How to cancel the status after detection of a DC error is described here, because no key input will be accepted after a DC error detection.

FL Display Description of IndicationsKey Operation

3.2 OVERLOAD (overcurrent) error detection

(Normal display)

(OVERLOAD detection)

(Auto)

(RECEIVER POWER OFF)

usually

*1

Normal display

Time (sec.)

A

2 3 4

B

C

D

E

F

50

1

2 3 4

VSX-821-K

5

Simultaneously holding the [ADVANCD SURROUND] and [STANDBY/ON] keys on the front panel pressed for 2 seconds will cancel Key Input Inhibition mode after a DC error detection and turn the unit ON.

[Detailed explanations]

3.3 TEMP (AMP overheat) error detection

For detection of a TEMP error, the unit monitors both the TR_DET and PROTECT2 signals. If a TEMP error is detected, the processes shown below will be performed. The processes shown below are rough operational specifications and are not the actual commands from the mounted components. After a TEMP error is detected, the count of protection activation detections will be updated.

FL Display Description of IndicationsKey Operation

3.4 How to cancel the status after detection of the DC error

(STANDBY state)

(Normal display)

usually

Normal display

Time (sec.)

[ADVANCED SURROUND] + [STANDBY/ON] keys (press and hold the keys for 2 seconds.)

Counter: Temp2

TR_DET P6_4 (34 pin) (TRTHER_DET from AMP Assy)

Normal Operations

Deduct 3 from the current VOL value. Have "TEMP" flashing on the FL display for 3 sec.

POWER OFF (STBY)

*1

*1: The detection interval must be 1 sec or less. *2: If PROTECT 2 is detected while TR_DET detection is prohibited for 2 min, the PROTECT 2 function will be activated.

Prohibit detection of TR_DET for 2 min. *2

Is TR_DET detected?

Is the VOL value 5

or less?

No

Ye s

Detection of TR_DET

is resumed after 2 min.

Is TR_DET detected?

Counter: Temp1

PROTECT2 PL2_1 (71 pin) (RADI_DET from AMP Assy)

Normal Operations

MUTE ON and ALL Speakers/ Phones Relay are set to OFF. Have "OVERHEAT" flashing on the FL display for 3 sec.

*3

*3: The detection interval must be 1 sec or less.

Timer START is performed for 3 sec.

PROTECT2 detected?

No

Ye s

After 3 sec,

PROTECT 2 is rechecked.

Is PROTECT 2 detected?

POWER OFF (STBY)

6 7 8

A

B

C

D

5

6 7 8

VSX-821-K

E

F

51

1

1. Discharging

(1) Unplug the power cord. (2) Disconnect the 10P connector from CP403 of the AMP Assy between CN3 of the MAIN Assy. (3) Connect +B and –B terminal of the D7, using resistor leads with 47 - 100 ohms (2 W or higher), for discharging. ∗ Discharging time: 30 - 60 seconds, depending on the level of resistance. (4) Check that the voltage between the +B and –B terminals is less than 1 V, using a tester. ∗ Be sure to connect the GND terminal of the tester to the chassis. ∗ If the voltage is still 1 V or higher, repeat Step (3).

[1] MAIN Assy Capacitor (C55, C58)

[Procedures]

(1) Unplug the power cord. (2) Connect CN704A pins 1 or 2 (–30V) of the FRONT Assy and GND terminal A, using resistor leads with 47-100 ohms (2 W or higher), for discharging. ∗ Discharging time: 5 - 10 seconds, depending on the level of resistance. (3) Check that the voltage between the –30V terminal is less than 1 V, using a tester. ∗ Be sure to connect the GND terminal of the tester to the chassis. ∗ If the voltage is still 1 V or higher, repeat Step (2).

[2] FL-30 V Capacitor

[Procedures]

47 - 100 ohms (2 W or higher)

47 - 100 ohms

(2 W or higher)

C55

+B–B

D7

CN704A

CP403

C58

Note:

(1) Even if the unit shown in the photos and illustrations in this manual may differ from your product, the procedures described here are common. (2) For performing the diagnosis shown below, the following jigs for service is required:

• Board to board extension jig cable (GGD1733)

• Board to board extension jig cable (GGD1734)

• 31P extension jig FFC (GGD1738)

• 9P extension jig cable (GGD1739)

• 13P extension jig cable (GGD1740)

MAIN Assy

AMP Assy

FRONT Assy

A

2 3 4

7. DISASSEMBLY

A

B

C

D

E

F

52

1

2 3 4

VSX-821-K

5

2. Notes on Ground Points Connection

During repair, before checking the MAIN Assy, etc., with the rear chassis removed, be sure to connect the GND terminal of the main capacitor to the chassis back (speaker chassis), as shown below, then connect the power cord.

Without grounding connection, the protection circuit will be activated. After repairing, be sure to remove the ground wire before reassembling.

[Note]

Main capacitor GND

MAIN Assy (SIDE B)

Speaker chassis

Chassis back

GND wire

(Be sure to disconnect the GND wire before reassembly.)

6 7 8

A

B

C

D

E

F

VSX-821-K

5

6 7 8

53

1

3. Disassembly

[1] Front Panel Section

Remove the cabinet by removing the 10 screws.

(1) Remove the five screws. (BBZ30P080FTB)

Note: The photo. without the explanatory note is VSX-821-K.

(2) Remove the two screws. (1500001206010-IL) (3) Remove the one screw. (BBZ30P080FTC)

(4) Unhook the two hooks.

(5) Arrange the front panel section as shown in the photo below.

1 1 1 1 1

2

4 4

2

3

5

• Bottom view

(VSX-821-K, VSX-921-K)

(VSX-521-K)

Front panel section

A

2 3 4

B

C

D

E

F

54

1

2 3 4

VSX-821-K

5

[2] Heatsink Section

Remove the cabinet by removing the 10 screws.

Caution: Heatsink section in work becomes hot, and be careful with it.

(1) Remove the three screws. (BBZ30P080FTC)

(2) Remove the six screws. (BBZ30P080FTC)

(3) Remove the one screw. (BBZ30P080FTC) (4) Remove the WIRE GUIDE A Assy. (5) Cut the binder.

GUDE R Assy GUDE L Assy

1

2

2 2

1 1

• Bottom view

WIRE GUIDE A Assy

4

3

5

6 7 8

A

B

C

D

5

VSX-821-K

6 7 8

E

F

55

1

(6) Disconnect the one connector. (CP401)

(7) Connect the extension jig cable. (8) Rotate the heatsink section in the direction of the arrow.

AMP Assy

Heatsink

6

7

8

CP401

Extension jig cable (VSX-821-K, VSX-521-K: GGD1739) (VSX-921-K: GGD1740)

A

B

2 3 4

C

D

E

F

56

1

2 3 4

VSX-821-K

5

[3] D-MAIN Assy

Remove the cabinet by removing the 10 screws.

(1) Remove the five screws. (BBT30P100FTB) (2) Remove the five screws. (BSZ30P040FTB)

(3) Cut the binder. (4) Disconnect the two B to B connectors. (CP1305, CP1306) (5) Remove the D-MAIN Assy.

1

• Rear view

Chassis back

2

1

×5

1

×3

(VSX-821-K, VSX-921-K)

(VSX-521-K)

1

• Rear view

Chassis back

2

1

×5

1

×3

D-MAIN Assy

BRIDGE A Assy

AUDIO Assy

CPU Assy

3

4

5

4

CP1306

CP1305

(6) Connect the two extension jig cables. (7) Arrange the D-MAIN Assy in the photo below. (8) Insert any insulation sheet.

Note:

Confirm that a B to B connector of BRIDGE A Assy is connected to AUDIO Assy tightly.

Insulation sheet

8

6

Borad to board extension jig cable (GGD1734)

6

Borad to board extension jig cable (GGD1733)

7

6 7 8

A

B

C

D

5

6 7 8

VSX-821-K

E

F

57

1

[4] MAIN Assy

[4-1] Chassis back, D-MAIN Assy

Remove the cabinet by removing the 10 screws.

(1) Remove the 14 screws. (BBT30P100FTB) (2) Remove the five screws. (BSZ30P040FTB) (3) Remove the D-MAIN Assy. (See procedure [3].)

1

• Rear view

Chassis back

2

1

1 1

1

1 1 1

1 1

×5

1

×3

(VSX-821-K, VSX-921-K)

(VSX-521-K)

1

• Rear view

Chassis back

2

1

×5

1

×3

[4-2] MAIN Assy

(1) Remove the four screws. (BBZ30P180FTC) (2) Remove the two screws. (BBZ30P080FTC) (3) Cut the four binders. (4) Remove the BRIDGE A and B Assys.

1

3

2

WIRE GUIDE A Assy BRIDGE A Assy

MAIN Assy

BRIDGE B

Assy

4

A

2 3 4

B

C

D

E

F

58

VSX-821-K

1

2 3 4

5

(5) Remove the four screws. (BBZ30P080FTC)

(6) Arrange the unit as shown in the photo below. (7) Connect the chassis ground. See “2. Notes on Ground Points Connection”.

5 5 5

5

6

7

MAIN Assy

[4-3] Regulator ICs and Recifier diode

(1) Remove the support. (2) Tighten then loosen the screw in each of the four holes for temporary joining that are located on the rear side of the main chassis. (This is for shaving the thread grooves to facilitate attachment in the next step.)

Support

MAIN Assy

Main chassis

Screwdriver

1

2

222

6 7 8

A

B

C

D

E

F

VSX-821-K

5

6 7 8

59

1

(3) Attach the three regulator ICs and a rectifier diode to the holes tapped in Step (2). Be sure to place them in a direction perpendicular to the board and take care that the jumper wires will not become distorted.

Note: While securing the regulator ICs and rectifier diode to the holes for temporary joining, tighten the screws while holding the regulator ICs and rectifier diode with your fingers so that the jumper wires will not become distorted.

MAIN Assy

333

3

[4-4] Diagnosis

(1) Remove the one screw and remove the earth lead jumper. (BBZ30P080FTC) (2) Reassemble the earth lead jumper. (3) Remove the WIRE GUIDE A Assy.

WIRE GUIDE A Assy

Earth lead jumper

WIRE GUIDE A Assy

3

1

2

A

2 3 4

B

C

D

E

F

60

VSX-821-K

1

2 3 4

5

(4) Reassemble the BRIDGE A and BRIDGE B Assys. (5) Reassemble the D-MAIN Assy with extension jig cables. (See procedure [3].) (6) Insert any insulation sheet between D-MAIN Assy and MAIN Assy. (7) Connect the extension jig FFC.

Insulation sheet

CPU Assy

6

CN704B

D-MAIN Assy

5

4

7

Extension jig FFC (GGD1738)

6 7 8

A

B

C

D

E

F

VSX-821-K

5

6 7 8

61

1

• If the adjustment is shifted or if it becomes necessary to readjust because of part replacement, etc., perform the adjustment as described below.

• Any value changed in Adjustment mode will be stored in memory as soon as it is changed. Before readjustment, take note of the original values for reference in case you need to restore the original settings.

• Use a stable AC power supply.

AMP Assy "8.3 IDLE CURRENT ADJUSTMENT" (All channel)

Other assemblies No adjustment required

When any of the following assemblies is replaced

AMP Assy "8.3 IDLE CURRENT ADJUSTMENT"

(Only channel of replacement parts)

Other assemblies No adjustment required

When any of the following parts is replaced

2 3 4

8. EACH SETTING AND ADJUSTMENT

A

B

8.1 ADJUSTMENT REQUIRED WHEN THE UNIT IS REPAIRED OR REPLACED

C

D

E

F

62

1

2 3 4

VSX-821-K

5

[Purpose]

(1) MAIN and SUB microcomputers update

PC

UPDATE jig

GGF1642

Straight Cable Adapter JIG's side

RS-232C

Straight cable

Rear side (VSX-821-K)

(SUB microcomputer)

(MAIN microcomputer)

10P

Refer to this section when updating the firmware of each microcomputer is required by the service information, etc.

[Necessary Tools]

• PC with a serial port

• RS-232C cable (9-pin to 9-pin, straight cable)

• RS-232C UPDATE jig: GGF1642 (Use FFC of GGF1642. (10P to 10P FFC))

• Firmware

[Connections]

Connect as shown in the figure below. Insert the FFC with its contact surface facing the " mark.

[Procedures]

for MAIN microcomputer

1. Unplug the AC cord. Connect the FFC cable. ( MAIN microcomputer ) Start up application FlashSta on the PC.

3. Press the OK button.

[ if the following messages are displayed ]

Please push the cancel button and press the JIG's RESET button. And confirm a connection of FFC. Please return to procedure 1.

2. Plug the AC cord. (STANDBY mode) For updating of the MAIN microcomputer, proceed with the following steps in STANDBY mode.

10P to 10P FFC

Select for COM port.

6 7 8

8.2 UPDATING OF THE FIRMWARE

A

B

C

D

5

VSX-821-K

6 7 8

E

F

63

1

4. Select the update file and enter ID. 6. Update Finished MAIN microcomputer.

7. Unplug the AC cord. Disconnect the FFC cable. Connect the FFC cable. ( SUB microcomputer ) Plug the AC cord. (STANDBY mode) Turn the main unit on. For updating of the SUB microcomputer, proceed with the following steps in POWER ON mode. Push the (reset) button on the JIG's Board. Start up application on the PC.

5. Set speed update and update the MCU.

1 Selection of upgrade file

1 Select the update file

2 Enter ID.

Select "VSX821 Main V0xx.mot" file to update the MCU.

2 Enter ID. Enter "ff" in all field.

Press the OK button.

(Default Baud rate is 9600)

Set Baud rate to 38400.

Press the OK button.

Press the OK button. Press the Exit button.

Please wait for until this window disappears.

3 Press OK button to go to next step.

2 Update the MCU. E.P.R=>Erase+Program+Read

2 Update the MCU Press the E.P.R … button

1 Set speed of update.

Press OK button.

for SUB microcomputer

[ if the following messages are displayed ]

Please push the cancel button and press the JIG's RESET button. And confirm a connection of FFC. Please return to procedure 7.

A

2 3 4

B

C

D

E

F

64

1

2 3 4

VSX-821-K

5

8. Select the update file and enter ID. 10. Update Finished SUB microcomputer.

11. Turn the main unit off. (STANDBY mode) Disconnect the FFC cable.

9. Set speed update and update the MCU.

1 Selection of upgrade file

1 Select the update file

2 Enter ID.

Select "VSX821Sub_v112.mot" file to update MCU.

821 & 521 & 421: Select "VSX-x21Sub_v0xx.mot" file to update the MCU. 921/K & 40 & 826: Select "VSX-921Sub_v0zz.mot" file to update the MCU.

2 Enter ID. Enter "ff" in all field.

Press the OK button.

Push the (reset) button during 1sec on the JIG's Board. Press the OK button.

Select the 9600 of the Board rate then press the OK button

(Default Baud rate is 9600)

Set Baud rate to 38400.

Press the OK button.

Press the OK button. Press the Exit button.

Please wait for until this window disappears.

3 Press OK button to go to next step.

2 Update the MCU. E.P.R=>Erase+Program+Read

2 Update the MCU Press the E.P.R … button

1 Set speed of update.

Press OK button.

If the following messages are displayed, shut the update program down, and start the update again from step 1.

6 7 8

A

B

C

D

5

VSX-821-K

6 7 8

E

F

65

1

12. Make sure that the main unit is in STANDBY mode. Press and hold the "ENTER" and "STANDBY/ON" keys, then press the "ENTER" key to display each UCOM version. Each time the "ENTER" key is pressed, then indications on the FL display change as follows:

13. Turn the main unit off.

Check to the software VER of MAIN & Sub microcomputers.

* The version of the USB UCOM is displayed only when USB/iPod FUNCTION is selected. (Except for VSX-521 & 421)

"ENTER" "ENTER"

"ENTER"

"ENTER" "ENTER" "ENTER"

MAIN UCOM MAIN V0.xx

SUB UCOM SUB V0zz

CEC CEC V1.yy

DSP UCOM

(USB UCOM)

All segments lit.

[Procedures]

(2) How to Update the USB Microcomputer (VSX-821-K, VSX-921-K ONLY)

1. Copy the "VSX_USB.rom" file to the root directory of a USB memory device.

2. Press the iPod USB key on the remote control unit to select iPod/USB function then connect the USB memory device.

3. After accessing the USB memory device, "UPG? NO" is displayed on the FL display and "UPDATE? NO" is displayed as an On-Screen display.

4. Press the iPod USB key on the remote control unit.

5. Send either iPod/USB Cursor Left or iPod/USB Cursor Right code.

6. "UPG? YES" is displayed on the FL display and "UPDATE? YES" is displayed as an On-Screen display.

7. After sending the iPod/USB Enter code, updating starts. (“UPDATE” is displayed on the FL display.)

8. When "UPG? NO" is displayed on the FL display and "UPDATE? NO" is displayed as the On-Screen display, updating is completed.

9. Disconnect the USB memory device then turn the unit off.

[Procedures]

(3) How to update the DSP Microcomputer

1. Select an Input Function that allows reception via Optical input 1 or 2 then set the unit to STBY_Off mode.

2. Press the SPEAKERS and STANDBY/ON keys simultaneously to enter DSP UpDate mode. ("DSP UP" is displayed.)

3. When "PLAY" is displayed, playback of the .wav file starts. (Play the file only once. NEVER repeat playback.) ("PLAY" is displayed.)

4. After playback is finished and "ENTER" is displayed, press the ENTER key on the front panel. ("ENTER" is displayed.)

5. "WRITING" is automatically displayed.

6. After writing is completed, "COMPLETE" is displayed.

7. Turn the unit off then confirm that the version has been updated.

[How to Confirm the Version of the USB Microcomputer]

1. Select the iPod/USB function then turn the unit off.

2. While holding the ENTER key on the front panel pressed, press the STNADBY/ON key.

3. When the receiver is turned on, press the ENTER key on the main unit three times. (Each time the ENTER key is pressed, the indications on the FL display change as follows: Main -> Sub -> DSP -> USB -> All segments lit.)

4. The version is displayed on the FL display, as "USB:***."

Notes on updating

• If you perform updating of the same software twice, it may fail.

• If the indication "UPDATE" on the FL display does not change, let it sit for a few minutes. If the indication on the FL display changes to one other than "UPDATE," the unit becomes operable. Turn the unit off after it becomes operable.

A

2 3 4

B

C

D

E

F

66

1

2 3 4

VSX-821-K

5

(SL)

• Adjustment points and measurement points.... see fig.1.

AMP ASSY

Fig.1

C

SIDE A

Adjustment

Points

Procedure

Measurement

Points

Channel

TP401 pin 1 (+) TP401 pin 3 (–)

1 Turn on the power.

2 Perform aging for one minute.

3 Connect a digital voltmeter to the measurement point.

4 Turn the adjustment VR so that the voltage becomes in 2.0 mV ± 0.2 mV.

(Condition : No signal and no load)

VR401

TP402 pin 1 (+) TP402 pin 3 (–)

VR402

TP403 pin 1 (+) TP403 pin 3 (–)

VR403

TP404 pin 1 (+) TP404 pin 3 (–)

VR404

TP405 pin 1 (+) TP405 pin 3 (–)

VR405

FL

FR

C

SL

SR

FL_VR401

SL_VR404 C_VR403 SR_VR405 FR_VR402

FL_TP401 SL_TP404 C_TP403 SR_TP405 FR_TP402

When any component parts which are within the red square on the following circuit diagram are replaced, the idle current adjustment of that channel is required. (Idle current adjustment for another channel is not required.) However, when any capacitors are replaced, the adjustment is not required. (The following circuit diagram is for SL channel, but another channel also has same circuit diagram and same adjustment is required)

for VSX-821-K, VSX-521-K

6 7 8

8.3 IDLE CURRENT ADJUSTMENT

A

B

C

D

VSX-821-K

5

6 7 8

E

F

67

1

(SL)

• Adjustment points and measurement points.... see fig.2.

AMP ASSY

Fig.2

B

for VSX-921-K

Adjustment

Points

Procedure

Measurement

Points

Channel

TP404 pin 1 (+) TP404 pin 3 (–)

1 Turn on the power.

2 Perform aging for one minute.

3 Connect a digital voltmeter to the measurement point.

4 Turn the adjustment VR so that the voltage becomes in 2.0 mV ± 0.2 mV.

(Condition : No signal and no load)

VR404

TP402 pin 1 (+) TP402 pin 3 (–)

VR402

TP403 pin 1 (+) TP403 pin 3 (–)

VR403

TP401 pin 1 (+) TP401 pin 3 (–)

VR401

TP405 pin 1 (+) TP405 pin 3 (–)

VR405

FL

FR

C

SL

SR

TP406 pin 1 (+) TP406 pin 3 (–)

VR406

TP407 pin 1 (+) TP407 pin 3 (–)

VR407

SBL

SBR

SIDE A

SL_VR401 FL_VR404 SR_VR405 FR_VR402 SBL_VR406 SBR_VR407C_VR403

SL_TP401 FL_TP404 C_TP403 SR_TP405 FR_TP402 SBL_TP406 SBR_TP407

When any component parts which are within the red square on the following circuit diagram are replaced, the idle current adjustment of that channel is required. (Idle current adjustment for another channel is not required.) However, when any capacitors are replaced, the adjustment is not required. (The following circuit diagram is for SL channel, but another channel also has same circuit diagram and same adjustment is required)

A

2 3 4

B

C

D

E

F

68

1

2 3 4

VSX-821-K

5

6 7 8

A

B

C

D

E

F

VSX-821-K

5

6 7 8

69

1

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.

-

Screws adjacent to b mark on product are used for disassembly.

-

For the applying amount of lubricants or glue, follow the instructions in this manual.

(In the case of no amount instructions, apply as you think it appropriate.)

Poly bag packing style

Cord AC

Tape (clear)

VSX-821-K, VSX-921-K

only

Dry cell batteries

Sheet SP caution

Label serial

Label getter

Label serial

1/2

2 3 4

9. EXPLODED VIEWS AND PARTS LIST

A

9.1 PACKING SECTION

B

C

D

E

F

70

1

2 3 4

VSX-821-K

5

6 7 8

(1) PACKING SECTION PARTS LIST

Mark No. Description Part No.

1 Remote Control See Contrast table (2)

2 AM Loop Antenna E601019000010-IL

3FM Wire Antenna E605010140010-IL

4 iPod Cable See Contrast table (2)

5 Microphone APM7008

(for Auto MCACC setup)

6 Operating Instructions See Contrast table (2)

(En, Frca, Es)

7 Box, Gift See Contrast table (2)

8 Cushion, Snow 6230212914000-IL

9 PE, Sheet 6327040059000-IL

(2) CONTRAST TABLE

VSX-821-K/CUXCNSM, VSX-921-K/UXCNCB and VSX-521-K/CUXCNSM are constructed the same except for the following:

A

B

Mark No. Symbol and Description

1 Remote Control 8300762100010-IL 8300762100010-IL 8300761900010-IL

4 iPod Cable L308102013020-IL L308102013020-IL Not used

6 Operating Instructions (En, Frca, Es) 5707000004990-IL 5707000004970-IL 5707000005040-IL

7 Box, Gift 60072118200G0-IL 6007211820090-IL 60072118200P0-IL

VSX-821-K

/CUXCNSM

VSX-921-K

/UXCNCB

VSX-521-K

/CUXCNSM

C

D

E

F

VSX-821-K

5

6 7 8

71

1

G

M

U

F

O

N

I

S

Nut

Cushion EVA

2 3 4

9.2 EXTERIOR SECTION (for VSX-821-K, VSX-921-K)

A

B

C

D

E

F

72

1

2 3 4

VSX-821-K

5

T

A

E

Q

L

P

R

K

H

D

J

B C

U

S

V

CONTACT SIDE

NON-CONTACT

SIDE

Silicon grease (GEM1057)

Silicon adhesive (GYA1011)

Cushion EVA

Heatsink

Cushion EVA

TUNER FM/AM

Main chassis

×

38

6 7 8

A

B

C

D

E

F

5

6 7 8

VSX-821-K

73

1

2 3 4

(1) EXTERIOR SECTION (for VSX-821-K, VSX-921-K) PARTS LIST

Mark No. Description Part No.

1 MAIN Assy See Contrast table (2)

A

2SUBWOOFER Assy 7028070272070-IL

3 GUIDE L Assy 7028070273070-IL

4 GUIDE R Assy 7028070274070-IL

5 WIRE GUIDE A Assy 7028070276070-IL

Mark

No. Description Part No.

46 Plate 4470212096000-IL

47 Plate 4470212066000-IL

48 Sheet 1217211472000-IL

49 Panel See Contrast table (2)

50 Window 5077213113020-IL

6 WIRE GUIDE B Assy 7028070277070-IL

7 AMP Assy See Contrast table (2)

8 BT Assy 7028070231010-IL

9 VIDEO Assy See Contrast table (2)

10 CPU Assy See Contrast table (2)

B

11 BRIDGE A Assy 7028070222070-IL

12 BRIDGE B Assy 7028070223070-IL

13 STANDBY Assy See Contrast table (2)

14 FRONT Assy 7028070211050-IL

15 POWER Assy 7028070212050-IL

16 MIC Assy 7028070213050-IL

17 F-VIDEO Assy 7028070214050-IL

18 HEADPHONE Assy 7028070215050-IL

19 AUDIO Assy See Contrast table (2)

C

20 USB Assy 7028070201050-IL

21 D-MAIN Assy See Contrast table (2)

> 22 Cord Assy L068125101710-IL > 23 Power Trans See Contrast table (2)

24 Cable, Flat Card 1.0 MM N711312022480-IL

25 Heatsink Assy See Contrast table (2)

51 Window 5077213123050-IL

52 Button 5090213741100-IL

53 Button 5090214561000-IL

54 Button 5090214571000-IL

55 Badge XAM3006

56 • • • • •

57 • • • • •

58 Screw 1500001206010-IL

59 Screw 1500001456010-IL

60 Screw BBT40P080FTB

61 Screw, Tap Tite BSZ30P040FTB

TC

62 Screw, Tap Tite BBZ30P0

80F

63 Screw, Tap Tite BBZ30P080FTB

64 Screw, Tap Tite BBT30P100FTB

65 Screw, Tap Tite BBZ30P180FTC

66 Screw, Tap Tite B020230063B10-IL

67 Screw, Tap Tite Assy B028940101B11-IL

> 26 Semi, TR/GE PNP 2SB J5011560Y0000-IL > 27 Semi, TR/GE NPN 2SC J502396400010-IL > 28 Semi, TR/GE NPN 2SD J5032390Y0000-IL

D

29 Bracket 4010056906010-IL

30 Screw, T

apping Assy B018230141H11-IL

31 Screw, Tap Tite B020030081B10-IL

32 Sheet 1210210235000-IL

33 Cabinet 3007211846000-IL

34 Cover 4317215111000-IL

35 Knob 5080212431000-IL

36 Sheet 1210211482000-IL

37 Chassis Back See Contrast table (2)

E

38 Foot 4007210391000-IL

39 Cushion 4050211385000-IL

40 Cushion 4050211605000-IL

41 Cushion 4050211745000-IL

42 Cushion 4050212685100-IL

43 Support 4070001601010-IL

44 Clamp 4330000310000-IL

45 Stopper 4380040162010-IL

F

74

1

2 3 4

VSX-821-K

5

6 7 8

(2) CONTRAST TABLE

VSX-821-K/CUXCNSM and VSX-921-K/UXCNCB are constructed the same except for the following:

Mark No. Symbol and Description

VSX-821-K

/CUXCNSM

1 MAIN ASSY 70280702710H0-IL 70280702710G0-IL 7 AMP ASSY 7028070241030-IL 7028070251040-IL

9 VIDEO ASSY 7028070261060-IL 7028070261070-IL 10 CPU ASSY 7028070221030-IL 7028070221070-IL 13 STANDBY ASSY 7028070225030-IL 7028070225070-IL

19 AUDIO ASSY 7028070181030-IL 7028070181050-IL 21 D-MAIN ASSY 7028070191030-IL 7028070191050-IL

> 23 Power Trans 8200960610850-IL 8200960610960-IL

25 Heatsink Assy 2128211908000-IL 2128211918000-IL 37 Chassis Back 3207213736000-IL 3207213746000-IL

49 Panel 3067215091000-IL 3067215091010-IL

VSX-921-K

/UXCNCB

A

B

C

D

E

F

VSX-821-K

5

6 7 8

75

1

G

F

O

N

I

S

Nut

Cushion EVA

2 3 4

9.3 EXTERIOR SECTION (for VSX-521-K)

A

B

C

D

E

F

76

1

2 3 4

VSX-821-K

PIONEER VSX-821-K, VSX-921-K, VSX-521-K User manual

Specifications and Main Features

Frequently Asked Questions

User Manual