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VSX-LX53

STANDBY/ON

ENTER

ADVANCED iPod
BAND TUNE MCACC PQLS HDMI iPhone PRESET TUNER EDIT

INPUT AUTO SURR/ALC/ ADVANCED STANDARD MULTI-ZONE MASTER
SELECTOR STREAM DIRECT STEREO SURROUND SURROUND HOME THX SPEAKERS CONTROL ON/OFF VOLUME

PHONES
VIDEO CAMERA
ORDER NO.
RRV4133
iPod
iPhone
MCACC SETUP MIC USB HDMI 5

VSX-LX53

AUDIO/VIDEO MULTI-CHANNEL RECEIVER

VSX-LX53
VSX-2020-K
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
Model Type Power Requirement Remarks
VSX-LX53 SYXJ5 AC 220 V to 230 V
VSX-2020-K SYXJ5 AC 220 V to 230 V

This service manual should be used together with the following manual(s).
Model No. Order No. Remarks
VSX-LX53 RRV4134 PCB RETRIEVAL DIAGRAM
VSX-2020-K

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

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
K-FZV JUNE 2010 Printed in Japan
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[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.
A
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.

B 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.
C 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.
D 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.

3. Lubricants, Glues, and Replacement parts
Use grease and adhesives that are equal to the specified substance.
Make sure the proper amount is applied.
E

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.

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.

F

2 VSX-LX53
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CONTENTS
1. SERVICE PRECAUTIONS .................................................................................................................................................... 5
1.1 NOTES ON SOLDERING ............................................................................................................................................... 5
1.2 NOTES ON REPLACING ............................................................................................................................................... 5 A
1.3 CAUTION........................................................................................................................................................................ 5
2. SPECIFICATIONS................................................................................................................................................................. 6
2.1 SPECIFICATIONS .......................................................................................................................................................... 6
2.2 PANEL FACILITIES......................................................................................................................................................... 7
3. BASIC ITEMS FOR SERVICE ............................................................................................................................................ 11
3.1 CHECK POINTS AFTER SERVICING ......................................................................................................................... 11
3.2 PCB LOCATIONS ......................................................................................................................................................... 12
3.3 JIGS LIST ..................................................................................................................................................................... 13
4. BLOCK DIAGRAM .............................................................................................................................................................. 14
4.1 OVERALL WIRING DIAGRAM ..................................................................................................................................... 14
4.2 BLOCK DIAGRAM FOR AUDIO BLOCK ...................................................................................................................... 16
4.3 BLOCK DIAGRAM FOR DIGITAL MAIN VIDEO BLOCK ............................................................................................. 18 B
4.4 BLOCK DIAGRAM FOR COMPOSITE VIDEO BLOCK ............................................................................................... 19
4.5 BLOCK DIAGRAM FOR COMPONENT VIDEO BLOCK.............................................................................................. 20
4.6 BLOCK DIAGRAM FOR POWER BLOCK(1) ............................................................................................................... 22
4.7 BLOCK DIAGRAM FOR POWER BLOCK(2) ............................................................................................................... 24
5. DIAGNOSIS ........................................................................................................................................................................ 26
5.1 DIAGNOSIS FLOWCHART .......................................................................................................................................... 26
5.2 CIRCUIT DESCRIPTION.............................................................................................................................................. 49
6. SERVICE MODE ................................................................................................................................................................. 55
6.1 TEST MODE................................................................................................................................................................. 55
7. DISASSEMBLY ................................................................................................................................................................... 57
7.1 DISASSEMBLY............................................................................................................................................................. 57
C
8. EACH SETTING AND ADJUSTMENT ................................................................................................................................ 73
8.1 HOW TO SAVE AND LOAD THE SETTINGS USING BACKUP FUNCTION WITH USB MEMORY ........................... 73
8.2 HOW TO UPDATE FIRMWARE.................................................................................................................................... 74
9. EXPLODED VIEWS AND PARTS LIST............................................................................................................................... 78
9.1 PACKING SECTION ..................................................................................................................................................... 78
9.2 EXTERIOR SECTION .................................................................................................................................................. 80
9.3 REAR SECTION........................................................................................................................................................... 82
9.4 FRONT SECTION ........................................................................................................................................................ 84
10. SCHEMATIC DIAGRAM .................................................................................................................................................... 86
10.1 AUDIO ASSY(1/3)(GUIDE PAGE) .............................................................................................................................. 86
10.2 AUDIO ASSY(2/3)....................................................................................................................................................... 92
10.3 AUDIO ASSY(3/3)....................................................................................................................................................... 94 D
10.4 COMPOSITE ASSY.................................................................................................................................................... 96
10.5 DAC LOW ASSY(1/2) ................................................................................................................................................. 98
10.6 DAC LOW ASSY(2/2) ............................................................................................................................................... 100
10.7 COMPONENT ASSY................................................................................................................................................ 102
10.8 DIGITAL MAIN ASSY(1/10)(GUIDE PAGE) .............................................................................................................. 104
10.9 DIGITAL MAIN ASSY(2/10) ...................................................................................................................................... 110
10.10 DIGITAL MAIN ASSY(3/10) .................................................................................................................................... 112
10.11 DIGITAL MAIN ASSY(4/10) .................................................................................................................................... 114
10.12 DIGITAL MAIN ASSY(5/10) .................................................................................................................................... 116
10.13 DIGITAL MAIN ASSY(6/10) .................................................................................................................................... 118
10.14 DIGITAL MAIN ASSY(7/10) .................................................................................................................................... 120
10.15 DIGITAL MAIN ASSY(8/10) .................................................................................................................................... 122 E
10.16 DIGITAL MAIN ASSY(9/10) .................................................................................................................................... 124
10.17 DIGITAL MAIN ASSY(10/10) .................................................................................................................................. 126
10.18 FRONT MIC&VIDEO ASSY.................................................................................................................................... 128
10.19 FRONT HDMI USB ASSY ...................................................................................................................................... 130
10.20 POWER AMP ASSY(1/2)........................................................................................................................................ 132
10.21 POWER AMP ASSY(2/2)........................................................................................................................................ 134
10.22 PRESTAGE ASSY .................................................................................................................................................. 136
10.23 DISPLAY ASSY ...................................................................................................................................................... 138
10.24 PRIMARY ASSY ..................................................................................................................................................... 140
10.25 USB REGULATOR ASSY ....................................................................................................................................... 142
10.26 XM REGULATOR ASSY ......................................................................................................................................... 144
F
10.27 REGULATOR ASSY ............................................................................................................................................... 146
10.28 POWER SW, ENCODER and HEADPHONE ASSYS ............................................................................................ 148
10.29 CONNECT and A-DAC BRIDGE ASSYS ............................................................................................................... 149
10.30 D-AUDIO BRIDGE ASSY ....................................................................................................................................... 150
VSX-LX53 3
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10.31 D-DAC BRIDGE ASSY............................................................................................................................................151
10.32 POS 1-3 ASSYS .....................................................................................................................................................152
10.33 BIND L FRONT and BACK, BINDER, BIND DM CABLE, BIND R BACK and FRONT, BIND DISP FFC ASSYS ..153
11. PCB CONNECTION DIAGRAM ......................................................................................................................................154
A 11.1 AUDIO ASSY ............................................................................................................................................................154
11.2 COMPOSITE ASSY ..................................................................................................................................................158
11.3 DAC LOW ASSY .......................................................................................................................................................160
11.4 COMPONENT ASSY ................................................................................................................................................162
11.5 DIGITAL MAIN ASSY ................................................................................................................................................164
11.6 FRONT MIC&VIDEO and FRONT HDMI USB ASSYS.............................................................................................168
11.7 POWER AMP ASSY .................................................................................................................................................170
11.8 PRESTAGE ASSY.....................................................................................................................................................174
11.9 DISPLAY ASSY.........................................................................................................................................................178
11.10 PRIMARY ASSY .....................................................................................................................................................182
11.11 USB REGULATOR and XM REGULATOR ASSYS.................................................................................................184
11.12 REGULATOR ASSY................................................................................................................................................186
B
11.13 POWER SW, ENCODER and HEADPHONE ASSYS ............................................................................................190
11.14 CONNECT and A-DAC BRIDGE ASSYS................................................................................................................192
11.15 D-AUDIO and D-DAC BRIDGE, POS 1-3 and BIND L FRONT ASSYS..................................................................194
11.16 BIND L BACK, BINDER, BIND DM CABLE, BIND R BACK/FRONT, BIND DISP FFC and BLUETOOH ASSYS ..196
12. PCB PARTS LIST ............................................................................................................................................................198

C

D

E

F

4 VSX-LX53
1 2 3 4
5 6 7 8

1. SERVICE PRECAUTIONS
1.1 NOTES ON SOLDERING