Pioneer VSX-920-K Service manual

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

2010

VSX-920-K

AUDIO/VIDEO MULTI-CHANNEL RECEIVER

VSX-920-K

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

Model Type Power Requirement Remarks

VSX-920-K UXCNCB AC 120 V

This service manual should be used together with the following manual(s).

Model No. Order No. Remarks

ORDER NO.

RRV4048

VSX-820-K/CUXCNSM RRV4043

For SPECIFICATIONS and PANEL FACILITIES, refer to the operating instructions.

K-ZZZ MAR.

2010 Printed in Japan

1

2 3 4

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 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.) Nos. indicate the pages and Nos. in the service manual for the base model.

NOTES:

When ordering resistors, first convert resistance values into code form as shown in the following examples. Ex.1 When there are 2 effective digits (any digit apart from 0), such as 560 ohm and 47k ohm (tolerance is shown by J=5%, and K=10%).

Ex.2 When there are 3 effective digits (such as in high precision metal film resistors).

5

6 1

4 7 3

R 5 0

1

R 0

RD1/4PU J RD1/4PU J RN2H K RS1P K

56 x 10

1

47 x 103 R50 1R0

561 473

RN1/4PC F562 x 10

1

5621 5 26 1

6 7 8

1. CONTRAST OF MISCELLANEOUS PARTS

CONTRAST TABLE

VSX-820-K/CUXCNSM and VSX-920-K/UXCNCB are constructed the same except for the following:

Mark No. Symbol and Description VSX-820-K/CUXCNSM VSX-920-K/UXCNCB Remarks

PCB ASSEMBLIES

NSP 1..MAIN ASSY 7025HK0916010-IL 7025HK0917060-IL

P68-16 2..MAIN ASSY 7028069111010-IL 7028069321010-IL

P68-6 2..PT ASSY 7028069112010-IL 7028069325010-IL

P68-9 2..CNT2 ASSY 7028069113010-IL 7028069322010-IL

P68-4 2..HEADPHONE ASSY 7028069114010-IL 7028069324010-IL

P68-7 2..HP_GUIDE ASSY 7028069115010-IL 7028069323010-IL

P68-5 2..MIC ASSY 7028069116010-IL 7028069327010-IL

P68-10 2..GUIDE_L ASSY 7028069117010-IL 7028069328010-IL

P68-11 2..GUIDE_R ASSY 7028069118010-IL 7028069329010-IL

P68-8 2..CNT1 ASSY 7028069119010-IL 7028069326010-IL

A

B

C

NSP 1..VIDEO ASSY 7025HK0916013-IL Not used

P68-12 2..VIDEO ASSY 7028069141010-IL Not used

NSP 1..VIDEO ASSY Not used 7025HK0917062-IL

P68-12 2..VIDEO ASSY Not used 7028069301010-IL

P68-3 2..SPEAKER ASSY Not used 7028069302010-IL

NSP 1..FRONT ASSY 7025HK0916011-IL 7025HK0917067-IL

P68-13 2..F-VIDEO ASSY 7028069123010-IL 7028069124010-IL

NSP 1..INPUT ASSY 7025HK0916012-IL 7025HK0917061-IL

P68-1 2..INPUT ASSY 7028069131010-IL 7028069291010-IL

NSP 1..SPEAKER ASSY 7025HK0916014-IL Not used

P68-3 2..SPEAKER ASSY 7028069151010-IL Not used

NSP 1..DSP ASSY 7025HK0916015-IL 7025HK0917063-IL

P68-19 2..DSP ASSY 7028069161010-IL 7028069311010-IL

P68-17 2..REG ASSY 7028069162010-IL 7028069312010-IL

NSP 1..HDMI ASSY 7025HK0916018-IL 7025HK0917064-IL

P68-18 2..HDMI ASSY 7028069191010-IL 7028069331010-IL

NSP 1..USB ASSY 7025HK0916016-IL 7025HK0917066-IL

P68-20 2..USB ASSY 7028069171010-IL 7028069173010-IL

5

6 7 8

VSX-920-K

D

E

F

3

1

2 3 4

Mark No. Symbol and Description VSX-820-K/CUXCNSM VSX-920-K/UXCNCB Remarks

NSP 1..AMP ASSY 7025HK0916019-IL 7025HK0917065-IL

P68-2 2..AMP ASSY 7028067523010-IL 7028069231020-IL

A

PACKING SECTION

P65-7 Operating Instructions (En/Frca/Es) 5707000003160-IL Not used

Operating Instructions (En/Sp) Not used 5707000003260-IL

P65-10 Box, Gift 6007211700060-IL 60072117000D0-IL

EXTERIOR SECTION

P68-22 Power Trans. 8200960610590-IL 8200960610700-IL

P68-27 Cable, Flat Card 1.25 N712232533810-IL N712232513880-IL

P68-30 Sheet 1210210762000-IL 1210211232000-IL

P68-35 Panel Front 3067214861000-IL 3067214861010-IL

B

P68-38 Chassis Back 3207213456000-IL 3207213456400-IL

Posistor Not used F320121021240-IL No. 69

NSP Label Getter 920U Not used 5507000004550-IL

NSP Label Hot Surface Not used 5507000003730-IL

C

D

E

F

4

1

2 3 4

VSX-920-K

5

×7

×5

×6

×3

×21

×7

C

F

Q

F

B

F

Jigs List

Jig Name Part No. Remarks

RS-232C upgrade jig GGF1642

Firmware upgrade (RS-232C ↔ Rear panel)

10P to 8P FFC GGF1676

Board to board extension jig cable GGD1674 Diagnosis (DSP Assy ↔ MAIN Assy)

13P extension jig cable GGD1669 Diagnosis (AMP Assy ↔ INPUT Assy)

8P extension jig cable GGD1670 Diagnosis (AMP Assy ↔ MAIN Assy)

7P extension jig cable GGD1671 Diagnosis (AMP Assy ↔ SPEAKER Assy)

2P short connector jig GGD1672 Diagnosis (Posistor ↔ MAIN Assy)

EXPLODED VIEWS

EXTERIOR SECTION

6 7 8

A

B

2. BASIC ITEMS FOR SERVICE

2.1 JIGS LIST

C

D

E

5

VSX-920-K

6 7 8

F

5

1

AMP ASSY (7028069231020-IL)

SPEAKER ASSY (7028069302010-IL)

HEADPHONE ASSY (7028069324010-IL)

REG ASSY (7028069312010-IL

O

P

FUNCTION ASSY (7028069122010-IL)

USB ASSY (702806917301

BT ASSY (702806918101

R

F

U

F

D

F

B

F

C

F

2 3 4

3. BLOCK DIAGRAM

3.1 OVERALL WIRING DIAGRAM

A

B

C

D

E

F

6

1

VSX-920-K

2 3 4

-

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

-

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

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

-

: The power supply is shown with the marked box.

MAIN ASSY (7028069321010-IL)

VIDEO ASSY (7028069301010-IL)

HDMI ASSY

(7028069331010-IL)

CNT2 ASSY (7028069322010-IL)

INPUT ASSY (7028069291010-IL)

CNT1 ASSY

(7028069326010-IL)

PT ASSY

(7028069325010-IL)

F-VIDEO ASSY

(7028069124010-IL)

O

FRONT ASSY (7028069121010-IL)

V

MIC ASSY (7028069327010-IL)

DSP ASSY (7028069311010-IL)

T T

1/2, 2/2

T

F

A

F

I

F

G

F

Q

F

R

F

S

F

E

F

M

F

N

F

J

F

S S

1/2, 2/2

CN201CN207CN208

5

6 7 8

A

B

C

D

E

F

5

6 7 8

VSX-920-K

7

1

B D0-D11

G Q12-Q23

R Q24-Q35

R D-24-D35

B Q0-Q11

RXODCK

RXDE RXHSYNC RXVSYNC

G D12-D23

RX_MCK,SDO/DLO,SCK/DCK,WS/DRO

VIDEO ASSY

INPUT ASSY

MAIN ASSY

INPUT

ASSY

VIDEO

ASSY

HDMI ASSY

USB ASSY

MAIN ASSY

MIC ASSY

DSP ASSY

V

BT ASSY

F-VIDEO ASSY

U

F

S

F

Q

F

T

F

E

F

M

F

N

F

2 3 4

3.2 OVERALL BLOCK DIAGRAM

A

B

C

D

E

F

8

1

2 3 4

VSX-920-K

5

HEADPHONE ASSY

SPEAKER ASSY

PT ASSY

INPUT ASSY

MAIN ASSY

SPEAKER

ASSY

AMP ASSY

O

FRONT ASSY

A

F

B

F

D

F

G

F

C

F

6 7 8

A

B

C

D

E

5

6 7 8

VSX-920-K

F

9

1

Step 3: Regulator IC

REG101 (Pin 3)

Is the

voltage of around

3.3 V input?

Replace REG103.

Check the ZD200 3.0B and IC106.

To Step 3

To Step 4

Step 0: Preliminary confirmation

Confirm the following items before checking

Tighten screws securely.

No

Yes

To Step 1

No

[1] DSP TROUBLESHOOTING

Step 2: Regulator IC

Check the REG101, and MAIN Assy

Check the REG103 and MAIN Assy.

REG103 (Pin 3)

Is the

voltage of around

5 V input?

No

Yes

(to chassis)

ZD200 cathode

Is the

voltage of 3.0 V

output?

No

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

*The IC106 power of DSP Assy

*The DSP IC CORE power of DSP Assy

XMCK

REG103 (Pin 2)

Is the

voltage of 3.3 V

output?

No

Yes

Is the

voltage of 1.2 V

output?

Replace REG101.

Check the path to XTAL101.

No

Yes

(to chassis)

REG101 (Pin 2)

(to chassis)

Step 1: BtoB connector, wire

CN201,CN207,CN208,

CP200,CP105

Are the

connectors securely

inserted?

Turn the power off and insert the connectors securely.

No

Yes

To Step 2

*CP200 connectors doesn't connection in case of DSP JIG B'D use.

BtoB connector, wire

Do screws of COAX

Jack securely tighten?

OR connect GND wire of

DSP JIG B'D to chassis.

Step 4: X'tal

To Step 5

Yes

IC109 (Pin 6, 7)

No

Is there

a 24.576 MHz

output?

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

Yes

IC102 (Pin 17)

No

Is there

a 24.576 MHz

input?

4. DIAGNOSIS

4.1 DIAGNOSIS FLOWCHART

A

2 3 4

B

C

D

E

F

10

1

VSX-920-K

2 3 4

5

Replace IC109.

Yes

IC109 (Pin 15)

DIR_BCK (Bit clock)

No

Is there

a bit clock

output?

(0 V ⇔ 3.3 V)

Yes

IC106 (Pin 4)

DAI_MCK (Master clock)

Is there

a master clock

output?

(0 V ⇔ 3.0 V)

Yes

IC106 (Pin 7)

DAI_LRCK (LR clock)

Is there

a LR clock

output?

(0 V ⇔ 3.0 V)

Yes

IC106 (Pin 9)

DAI_BCK (Bit clock)

*IC106 Pin 1 0 V : DIR

3.3 V : HDMI

Is there

a bit clock

output?

(0 V ⇔ 3.0 V)

Replace IC106.

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

No

Is the

voltage of

IC106-pin 1

0 V?

Yes

Switch

Step 5: DIR

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

Check the path to CP105 connector.

Replace IC109.

Check the path to OUTPUT PIN of JACK105, JACK106.

IC110 (Pins 3, 5)

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

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

Can

observe the

digital signal

?

No

(0 V ⇔ 3.3 V)

Yes

IC109 (Pin 67)

COAX

Can

observe the

digital signal

?

No

Yes

Check that the data and clock signals are output.

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

(0 V ⇔ 3.3 V)

Yes

IC109 (Pin 71)

From USB Assy

Can

observe the

digital signal

?

No

(0 V ⇔ 3.3 V)

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

IC109 (Pins 61, 63)

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

Can

observe the

digital signal

?

No

Yes

(0 V ⇔ 3.3 V)

Check the MAIN Assy.

IC109 (Pin 10)

DIR_MCK (Master clock)

No

Yes

Is there

a master clock

output?

IC109 (Pin 16)

DIR_LRCK (LR clock)

No

Is there

a LR clock

output?

Replace IC109.

(0 V ⇔ 3.3 V)

Yes

IC109 (Pin 14)

DIR_SDTO (Data)

No

Is there

a data

output?

Is the

voltage of PDN

IC109-pin 31

3.3 V?

Check the USB Assy.

No

To Step 6

6 7 8

A

B

C

D

5

VSX-920-K

6 7 8

E

F

11

1

Step 6: DSP output (digital)

Yes

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

IC109 (Pin 26)

Center/LFE data

No

Is there

a data input?

Yes

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

IC109 (Pin 25)

Surround back L/R data

No

Is there

a data input?

Yes

IC109 (Pin 27)

Surround L/R data

No

Is there

a data input?

Yes

IC109 (Pin 18)

DSP_BCK (Bit clock)

No

Is there

a bit clock

input?

Yes

IC109 (Pin 19)

DSP_LRCK (LR clock)

No

Is there

a LR clock

input?

Yes

IC109 (Pin 28)

Front L/R data

No

Is there

a data input?

(0 V ⇔ 3.3 V)

To Step 7

A

2 3 4

B

C

D

E

F

12

1

VSX-920-K

2 3 4

5

Ye s

Replace IC109.

IC109 (Pin 49)

Front R out

No

Is the output

2.5 V fixing?

Replace IC109.

Ye s

IC109 (Pin 43)

Surround L out

No

Is the output

2.5 V fixing?

Replace IC109.

IC109 (Pin 41)

Center out

No

Is the output

2.5 V fixing?

Ye s

Replace IC109.

IC109 (Pin 39)

End

LFE out

No

Is the output

2.5 V fixing?

Ye s

Replace IC109.

IC109 (Pin 47)

Front L out

No

Is the output

2.5 V fixing?

Replace IC109.

IC109 (Pin 45)

Surround R out

No

Is the output

2.5 V fixing?

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

Replace IC109.

Ye s

IC109 (Pin 43)

Surround L out

No

Is there

a audio signal

output?

Replace IC109.

Ye s

IC109 (Pin 41)

Center out

No

Is there

a audio signal

output?

Replace IC109.

Ye s

IC109 (Pin 39)

LFE out

No

Is there

a audio signal

output?

Step 7: Codec output (analog)

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

Replace IC109.

Ye s

IC109 (Pin 49)

Front R out

No

Is there

a audio signal

output?

Replace IC109.

Ye s

IC109 (Pin 47)

Front L out

No

Is there

a audio signal

output?

Replace IC109.

Ye s

IC109 (Pin 45)

Surround R out

No

Is there

a audio signal

output?

6 7 8

A

B

C

D

E

F

VSX-920-K

5

6 7 8

13

1

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

[2] HDMI TROUBLESHOOTING

Causes for no display or sound from the monitor

HDMI Simple Diagnosis

Replace the HDMI cable.

NG

OK

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

Replace the Player.

Replace the HDMI cable.

Repare the Receiver.

Repare the Player.

NG

OK

Replace the Monitor.

Repare the Monitor.

NG

POWER ON

Confirm the following items before checking

Do

screws of HDMI

jack securely

tighten?

Tighten screws securely.

No

Yes

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

To Step 2

To Step 1

Sink equipment: Connect a TV to HDMI OUT.

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

Function switch (BD or DVD or TV or DVR)

Switch the function that HDMI was assigned. Factory shipments setting:

HDMI 1: BD HDMI 2: DVD HDMI 3: TV/SAT HDMI 4: DVR/VCR

HDMI Troubleshooting

Step 0: Preliminary confirmation

Step 1: Connect the HDMI equipment

A

2 3 4

B

C

D

E

F

14

1

2 3 4

VSX-920-K

CN701 (Pin 1)

Is the voltage

0 to 3.3 V?

No

SUB_ON

Diagnose the MAIN Assy.

Yes

CN701 (Pin 9)

Is the voltage

3.3 V?

Is the voltage

3.3 V?

Is the voltage

3.3 V?

Is the voltage

5 V?

No

SUB MICOM 3.3V

Q711, Q722 (collector)

No

SUB MICOM 3.3V, IC709 3.3V

Yes

CN702 (Pin 17)

No

HDMI_5V

Yes

CN704 (Pins 3, 4)

No

HDMI_3.3V

Yes

Is

Q711,Q722

base voltage

2.6 V?

No

Yes

To Step 3

Is the voltage

3.3 V?

Is the voltage

1.8 V?

Is the voltage

3.3 V?

Is the voltage

1.2 V?

Replace IC704.

Replace IC701.

IC704 (Pin 3)

No

HDMI 3.3V

Yes

IC704 (Pin 2)

No

HDMI 1.8V

Yes

Check the parts and patterns in the path.

Is IC704

abnormally

hot?

Is IC701

abnormally

hot?

No

Yes

IC701 (Pin 3)

No

HDMI 3.3V

HDMI 1.2V

Yes

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

Check the parts and patterns in the path. Replace Q711, Q722, IC706, etc.

Check the parts and patterns in the path Q711, Q722, Q714, Q721, etc.

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

Is the voltage

3.3 V?

Is the voltage

1.8 V?

Replace REG101.

REG101 (Pin 3)

No

HDMI 3.3V

Yes

REG101 (Pin 2)

No

ABT 1V8

Yes

Check the parts and patterns in the path.

Is REG101 abnormally

hot?

No

Yes

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

IC701 (Pin 2)

No

Yes

No

Yes

Step 2: Power supply

Replace Q714, Q721.

No

Yes

Is

Q714,Q721

collector voltage

0 V? (base is 3.3 V)

5

6 7 8

A

B

C

D

5

VSX-920-K

6 7 8

E

F

15

1

Check the parts and patterns in the path of pin 87 of IC706.

Is the voltage

0 to 3.3 V?

Is there a data

0 to 3.3 V?

IC703 (Pin 21)

No

HR_RST

Yes

IC702 (Pin 25)

No

Yes

Check the parts and patterns in the path of pin 89 of IC706.

To Step 4

Check the parts and patterns in the path of pin 56 of IC706.

Is the voltage

0 to 3.3 V?

Is there a data

0 to 3.3 V?

IC707 (Pin 51)

No

ADV_RST

ABT_RST

Yes

IC709 (Pin 63)

No

Yes

Check the parts and patterns in the path of pin 59 of IC706.

Step 3: Diagnosis

CN701 (Pin 5)

Is the voltage

0 to 3.3 V?

No

SUB_RESET

Diagnose the MAIN Assy.

Yes

CN701 (Pin 4)

Is the voltage

0 to 3.3 V?

No

SUB_PDN

CN701 (Pin 8)

Is there

a data input?

(0 to 3.3 V)

Is there

a data input?

(0 to 3.3 V)

No

CSCK_MAIN

Yes

CN701 (Pin 3)

Is there

a data input?

(0 to 3.3 V)

No

MAIN_IRQ

Yes

CN701 (Pin 2)

Is there

a data output?

(0 to 3.3 V)

Is there

a data output?

(0 to 3.3 V)

No

SUB_IRQ

Check the parts and patterns in the path of IC706.

Yes

CN701 (Pin 7)

No

SCDO_MAIN

Yes

CN701 (Pin 6)

No

SCDI_MAIN

Yes

Check the parts and patterns in the path of IC706.

Each data lines confirmation checks it after standby OFF/ON.

A

2 3 4

B

C

D

E

F

16

VSX-920-K

1

2 3 4

5

Step 4: X'TAL

Replace IC706 or X702.

Replace IC703 or X701.

Is there

a 16 MHz

input?

Is there

a 16 MHz

output?

Is there

a 27 MHz

input?

Is there

a 27 MHz

output?

IC706 (Pin 15)

No

Yes

IC706 (Pin 13)

No

Yes

Check the path to pin13 of IC706. Replace IC706.

IC703 (Pin 5)

No

Yes

IC703 (Pin 4)

No

Yes

Check the path to pin4 of IC703. Replace IC703.

To Step 5

Replace IC707 or X705.

Is there

a 27 MHz

input?

Is there

a 28.63636 MHz

input?

Is there

output?

IC709 (Pin 7)

No

Yes

Check the path to pin1,2,6,7 of IC712. Replace IC712 or X704.

IC707 (Pin 21)

No

Yes

IC707 (Pin 22)

No

Yes

Check the path to pin22 of IC707. Replace IC707.

JACK701 (Pin 18)

+5V_R3

Is the voltage

5 V?

Is the voltage

5 V?

Is the voltage

5 V?

Check the JACK705. If JACK705 is failure, replace JACK705.

Check the JACK704. If JACK704 is failure, replace JACK704.

Check the JACK703. If JACK703 is failure, replace JACK703.

Yes

JACK703 (Pin 18)

+5V_R2

Yes

No

JACK704 (Pin 18)

No

+5V_R1

Yes

* When connected the equipment to IN1(BD);

* When connected the equipment to IN2(DVD);

* When connected the equipment to IN3(TV/SAT);

Is the voltage

5 V?

Check the JACK705. If JACK705 is failure, replace JACK705.

JACK705 (Pin 18)

No

+5V_R0

Yes

* When connected the equipment to IN4(DVR/VCR);

To Step 6

Step 5: IN/OUTPUT Diagnosis

6 7 8

A

B

C

D

E

F

VSX-920-K

5

6 7 8

17

1

JACK702 (Pin 19)

HPD_SINK

Check the JACK702. If JACK702 is failure, replace JACK702.

Yes

JACK701 (Pin 19)

HPD3

Yes

No

Check the JACK703 and IC703. If JACK703 or IC703 is failure, replace JACK703 or IC703.

JACK703 (Pin 19)

No

HPD2

Check the JACK701 and IC703. If JACK701 or IC703 is failure, replace JACK701 or IC703.

Yes

JACK704 (Pin 19)

HPD1

* When connected the equipment to IN2 (DVD);

* When connected the equipment to IN1 (BD);

* When connected the equipment to IN3 (TV/SAT);

Is the

voltage 5 V

when selecting

IN2?

Is the

voltage 5 V

when selecting

IN1?

Is the voltage

5 V?

Check the JACK704 and IC703. If JACK704 or IC703 is failure, replace JACK704 or IC703.

No

Yes

Is the

voltage 5 V

when selecting

IN3?

JACK705 (Pin 19)

HPD0

* When connected the equipment to IN4 (DVR/VCR);

Check the JACK705 and IC703. If JACK705 or IC703 is failure, replace JACK705 or IC703.

No

Yes

Is the

voltage 5 V

when selecting

IN4?

To Step 7

Step 6: Hot plug detect

A

2 3 4

B

C

D

E

F

18

VSX-920-K

1

2 3 4

SDA2 (HDMI IN2 (DVD))

No

IC703 (Pin 40)

Is

there a same

signal as IC702-pin 49

when selecting

IN2?

Check the IC702 and JACK703. If IC702 or JACK703 is failure, replace IC702 or JACK703.

* When connected the equipment to IN2 (DVD):

SCL2 (HDMI IN2 (DVD))

No

IC703 (Pin 39)

Is

there a same

signal as IC702-pin 48

when selecting

IN2?

Yes

Check the IC702 and JACK703. If IC702 or JACK703 is failure, replace IC702 or JACK703.

(0 to 5 V)

SDA1 (HDMI IN3 (TV/SAT))

No

IC703 (Pin 36)

Is

there a same

signal as IC702-pin 49

when selecting

IN3?

Yes

Check the IC702 and JACK704. If IC702 or JACK704 is failure, replace IC702 or JACK704.

* When connected the equipment to IN3 (TV/SAT):

SCL1 (HDMI IN3 (TV/SAT))

No

IC703 (Pin 35)

Is

there a same

signal as IC702-pin 48

when selecting

IN3?

Yes

Check the IC702 and JACK704. If IC702 or JACK704 is failure, replace IC702 or JACK704.

(0 to 5 V)

SDA0 (HDMI IN4 (DVR/VCR))

No

IC703 (Pin 32)

Is

there a same

signal as IC702-pin 49

when selecting

IN4?

Yes

Check the IC702 and JACK705. If IC702 or JACK705 is failure, replace IC702 or JACK705.

* When connected the equipment to IN4 (DVR/VCR):

SCL0 (HDMI IN4 (DVR/VCR))

No

IC703 (Pin 31)

Is

there a same

signal as IC702-pin 48

when selecting

IN4?

Check the IC702 and JACK705. If IC702 or JACK705 is failure, replace IC702 or JACK705.

(0 to 5 V)

IC702 (Pin 47)

SDA (HDMI OUT)

SDA3 (HDMI IN1(BD))

Does

a signal output in

constant period

(0 to 5 V)

?

Check the JACK702 and IC702. If JACK702 or IC702 is failure, replace JACK702 or IC702.

No

Yes

IC702 (Pin 46)

SCL (HDMI OUT)

Does

a clock output in

constant period

(0 to 5 V)

?

Check the JACK702 and IC702. If JACK702 or IC702 is failure, replace JACK702 or IC702.

Yes

IC703 (Pin 44)

Is

there a same

signal as IC702-pin 49

when selecting

IN1?

Yes

Check the IC702 and JACK701. If IC702 or JACK701 is failure, replace IC702 or JACK701.

* When connected the equipment to IN1(BD);

SCL3 (HDMI IN1(BD))

No

IC703 (Pin 43)

Is

there a same

signal as IC702-pin 48

when selecting

IN1?

Yes

Check the IC702 and JACK701. If IC702 or JACK701 is failure, replace IC702 or JACK701.

HDMI_SDA

No

HDMI_SCL

IC702 (Pin 49)

Is

there a same

signal as IC703-pin 24

(0 to 3.3V)

?

Yes

Check the IC702, IC703 and IC706. If IC702 or IC703 is failure, replace IC702 or IC703.

IC702 (Pin 48)

Is

there a same

signal as IC703-pin 23

(0 to 3.3V)

?

Yes

(0 to 5 V)

Step 7: SDA /SCL

A

5

6 7 8

A

B

C

D

E

5

VSX-920-K

6 7 8

F

19

A

IC702 (Pins 30,31,33,34,36,37,39,40)

TMDS OUTPUT

Check the IC702 or IC703. If IC1702 or IC703 is failure, replace IC702 or IC703.

End

No

Are there

signals(approx. 0.5

Vp-p) in all

lines?

Yes

Step 9: TMDS

SDA (SCALER)

No

IC709 (Pin 61)

Yes

Check the line and IC702, RESET (63_H). Check the IC706. If IC709 is failure, replace IC709.

Check the line and IC702, RESET (51_H). Check the IC706. If IC707 is failure, replace IC707.

Check the line and IC702, RESET (63_H). Check the IC706. If IC709 is failure, replace IC709.

SCL (SCALER)

No

IC709 (Pin 62)

Yes

SDA (DECODER)

No

IC707 (Pin 53)

Yes

SCL (DECODER)

No

IC707 (Pin 54)

Yes

To Step 8

CN703

Wire

Are the

connectors securely

inserted ?

Does

a signal output in

constant period

(0 to 3.3 V)

?

Does

a signal output in

constant period

(0 to 3.3 V)

?

Does

a signal output in

constant period

(0 to 3.3 V)

?

Does

a signal output in

constant period

(0 to 3.3 V)

?

Check the line and IC706. If IC706 is failure, replace IC706.

Check the line and IC707. If IC707 is failure, replace IC707. IC707 (Pin 36 (CVBS), 47 (CR), 48 (CB), 49 (Y), 50 (SOY))

Check the line and IC706. If IC706 is failure, replace IC706.

No (0 V)

Yes (3.3 V)

COMP_DET

IC706 (Pin 56)

Yes (3.3 V)

SIGNAL INPUT

No

IC707(Pin 36,47-50)

Yes

To Step 9

Does

a signal output in

constant period

(0 to 3.3 V)

?

Does

a signal output in

constant period

(0 to 3.3 V)

?

Does

a signal output in

constant period

(WAVE)

?

Turn the power off and insert the wire securely.

No

Yes

IC706 (Pin 54)

CVBS_DET

Step 8: ANALOG UP

A

B

1

2 3 4

C

D

E

F

20

1

2 3 4

VSX-920-K

5

(1) Secure the wires from the USB Assy.

(4) Style the 4P wire (F-VIDEO) so that it goes below the corresponding cables marked with circles in the figure below.

(5) Style the remaining two wires above wire A, which connects the AMP and INPUT Assys.

(2) Secure the card cable and the remaining wires with the clamps.

(3) Wrap the remaining wires with CU tape foil then secure them with a cable tie.

CABLE DRESSING (VSX-920-K)

GUIDE_R Assy

Clamp

Wire (USB <-> DSP)

Card cable

Wires

The remaining wires

CU tape foil

Cable tie

The 4P wire (F-VIDEO)

Wire A

Style the wires so that they are placed above wire A.

Wire (USB <-> MAIN)

4P wire

5. DISASSEMBLY

5.1 DISASSEMBLY

6 7 8

A

B

C

D

E

F

VSX-920-K

5

6 7 8

21

1

(6) Secure the cables bound with CU tape foil to the chassis, using a cable tie for grounding.

• The wires bound with CU tape foil (part No.: 1220-21087-900-0S) are shown below.

When repairing an assy on the front side, as the wires are secured to the assys, it is necessary to peel off CU tape foil to unbind the wires in order to disconnect them. After repair, wrap the wires again, using new CU tape foil.

When repairing an assy on the rear side, as the wires are disconnected/connected with connectors, you don't have to peel off CU tape foil.

After disconnecting the wires, style them again, following the procedures shown above.

Cable tie

Directly mounted wire

Chassis

USB Assy

Front side Rear side

CU tape foil

DSP Assy

Directly mounted wire

F-VIDEO Assy

VIDEO Assy

Directly mounted wire

MIC Assy

INPUT Assy

A

2 3 4

B

C

D

E

F

22

1

2 3 4

VSX-920-K

Pioneer VSX-920-K Service manual

VSX-920-K

CONTENTS

1. CONTRAST OF MISCELLANEOUS PARTS

CONTRAST TABLE

EXPLODED VIEWS

2. BASIC ITEMS FOR SERVICE

2.1 JIGS LIST

3. BLOCK DIAGRAM

3.1 OVERALL WIRING DIAGRAM

3.2 OVERALL BLOCK DIAGRAM

4. DIAGNOSIS

4.1 DIAGNOSIS FLOWCHART

5. DISASSEMBLY

5.1 DISASSEMBLY