Pioneer VSX-1018-AHK, VSX-1018-AHS, VSXLX-51 Service manual
PIONEER CORPORATION 4-1, Meguro 1-chome, Meguro-ku, Tokyo 153-8654, Japan
PIONEER ELECTRONICS (USA) INC. P.O. Box 1760, Long Beach, CA 90801-1760, U.S.A.
PIONEER EUROPE NV Haven 1087, Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 Alexandra Road, #04-01, Singapore 159936
PIONEER CORPORATION
2008
VSX-LX51
For details, refer to "Important Check Points for good servicing".
AUDIO/VIDEO MULTI-CHANNEL RECEIVER
VSX-LX51
VSX-1018AH-K
VSX-1018AH-S
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
Model Type Power Requirement Remarks
VSX-LX51 HYSXJ5 AC 220 V to 230 V
VSX-1018AH-K YSXJ5 AC 220 V to 230 V
VSX-1018AH-S
YSXJ5
AC 220 V to 230 V
ORDER NO.
RRV3765
T- Z Z V MAY
2008 Printed in Japan
1
This service manual is intended for qualified service technicians ; it is not meant for the casual do-ityourselfer. Qualified technicians have the necessary test equipment and tools, and have been trained
to properly and safely repair complex products such as those covered by this manual.
Improperly performed repairs can adversely affect the safety and reliability of the product and may
void the warranty. If you are not qualified to perform the repair of this product properly and safely, you
should not risk trying to do so and refer the repair to a qualified service technician.
2 3 4
SAFETY INFORMATION
A
B
C
D
E
F
2
1
2 3 4
VSX-LX51
5
[Important Check Points for Good Servicing]
In this manual, procedures that must be performed during repairs are marked with the below symbol.
Please be sure to confirm and follow these procedures.
1. Product safety
Please conform to product regulations (such as safety and radiation regulations), and maintain a safe servicing environment by
following the safety instructions described in this manual.
1 Use specified parts for repair.
Use genuine parts. Be sure to use important parts for safety.
2 Do not perform modifications without proper instructions.
Please follow the specified safety methods when modification(addition/change of parts) is required due to interferences such as
radio/TV interference and foreign noise.
3 Make sure the soldering of repaired locations is properly performed.
When you solder while repairing, please be sure that there are no cold solder and other debris.
Soldering should be finished with the proper quantity. (Refer to the example)
4 Make sure the screws are tightly fastened.
Please be sure that all screws are fastened, and that there are no loose screws.
5 Make sure each connectors are correctly inserted.
Please be sure that all connectors are inserted, and that there are no imperfect insertion.
6 Make sure the wiring cables are set to their original state.
Please replace the wiring and cables to the original state after repairs.
In addition, be sure that there are no pinched wires, etc.
7 Make sure screws and soldering scraps do not remain inside the product.
Please check that neither solder debris nor screws remain inside the product.
8 There should be no semi-broken wires, scratches, melting, etc. on the coating of the power cord.
Damaged power cords may lead to fire accidents, so please be sure that there are no damages.
If you find a damaged power cord, please exchange it with a suitable one.
9 There should be no spark traces or similar marks on the power plug.
When spark traces or similar marks are found on the power supply plug, please check the connection and advise on secure
connections and suitable usage. Please exchange the power cord if necessary.
a Safe environment should be secured during servicing.
When you perform repairs, please pay attention to static electricity, furniture, household articles, etc. in order to prevent injuries.
Please pay attention to your surroundings and repair safely.
2. Adjustments
To keep the original performance of the products, optimum adjustments and confirmation of characteristics within specification.
Adjustments should be performed in accordance with the procedures/instructions described in this manual.
4. Cleaning
For parts that require cleaning, such as optical pickups, tape deck heads, lenses and mirrors used in projection monitors, proper
cleaning should be performed to restore their performances.
3. Lubricants, Glues, and Replacement parts
Use grease and adhesives that are equal to the specified substance.
Make sure the proper amount is applied.
5. Shipping mode and Shipping screws
To protect products from damages or failures during transit, the shipping mode should be set or the shipping screws should be
installed before shipment. Please be sure to follow this method especially if it is specified in this manual.
6 7 8
A
B
C
D
5
VSX-LX51
6 7 8
E
F
3
1
2 3 4
CONTENTS
SAFETY INFORMATION ..........................................................................................................................................................2
1. SERVICE PRECAUTIONS ....................................................................................................................................................6
2. SPECIFICATIONS .................................................................................................................................................................7
A
B
C
D
E
F
2.1 ACCESSORIES ..............................................................................................................................................................7
2.2 SPECIFICATIONS...........................................................................................................................................................8
2.3 PANEL FACILITIES .........................................................................................................................................................9
3. BASIC ITEMS FOR SERVICE.............................................................................................................................................14
3.1 CHECK POINTS AFTER SERVICING..........................................................................................................................14
3.2 PCB LOCATIONS .........................................................................................................................................................15
3.3 JIGS LIST .....................................................................................................................................................................17
4. BLOCK DIAGRAM...............................................................................................................................................................18
4.1 OVERALL WIRING DIAGRAM......................................................................................................................................18
4.2 BLOCK DIAGRAM FOR AUDIO BLOCK ......................................................................................................................20
4.3 BLOCK DIAGRAM FOR VIDEO BLOCK ......................................................................................................................21
4.4 BLOCK DIAGRAM FOR HDMI FOR VSX-LX51 ...........................................................................................................23
4.5 BLOCK DIAGRAM FOR HDMI FOR VSX-1018AH ......................................................................................................24
4.6 BLOCK DIAGRAM FOR USB BLOCK ..........................................................................................................................25
4.7 BLOCK DIAGRAM FOR U-COM ..................................................................................................................................26
4.8 BLOCK DIAGRAM FOR POWER SUPPLY BLOCK .....................................................................................................27
5. DIAGNOSIS.........................................................................................................................................................................28
5.1 DIAGNOSIS FLOWCHART...........................................................................................................................................28
5.2 CIRCUIT DESCRIPTION..............................................................................................................................................61
6. SERVICE MODE .................................................................................................................................................................64
6.1 TEST MODE .................................................................................................................................................................64
7. DISASSEMBLY....................................................................................................................................................................67
8. EACH SETTING AND ADJUSTMENT ................................................................................................................................71
8.1 HOW TO UPDATE FIRMWARE....................................................................................................................................71
9. EXPLODED VIEWS AND PARTS LIST...............................................................................................................................76
9.1 PACKING SECTION .....................................................................................................................................................76
9.2 EXTERIOR SECTION...................................................................................................................................................78
9.3 CHASSIS SECTION .....................................................................................................................................................80
9.4 POWER AMP SECTION...............................................................................................................................................82
9.5 FRONT PANEL SECTION ............................................................................................................................................84
10. SCHEMATIC DIAGRAM ....................................................................................................................................................86
10.1 AUDIO IN ASSY (1/2) .................................................................................................................................................86
10.2 AUDIO IN ASSY (2/2) .................................................................................................................................................88
10.3 MAIN ASSY (1/4)........................................................................................................................................................90
10.4 MAIN ASSY (2/4)........................................................................................................................................................92
10.5 MAIN ASSY (3/4)........................................................................................................................................................94
10.6 MAIN ASSY (4/4)........................................................................................................................................................96
10.7 DSP & USB ASSY (1/5)..............................................................................................................................................98
10.8 DSP & USB ASSY (2/5)............................................................................................................................................100
10.9 DSP & USB ASSY (3/5)............................................................................................................................................102
10.10 DSP & USB ASSY (4/5)..........................................................................................................................................104
10.11 DSP & USB ASSY (5/5)..........................................................................................................................................106
10.12 FRONT IN ASSY.....................................................................................................................................................108
10.13 INTERFACE ASSY .................................................................................................................................................110
10.14 HDMI & DVC ASSY (1/2) (VSX-LX51)....................................................................................................................112
10.15 HDMI & DVC ASSY (2/2) (VSX-LX51)....................................................................................................................114
10.16 HDMI ASSY (VSX-1018AH)....................................................................................................................................116
10.17 BINDER, BIND L FRONT, BIND L BACK, BIND R FRONT and BIND R BACK ASSYS ........................................118
......
10.18 POSI1, POSI2 and POSI3 ASSYS ...............................................................................................
....................119
10.19 DISPLAY ASSY.......................................................................................................................................................120
10.20 MULTI JOG, POWER SW, DIODE, HEADPHONE, PRIMARY and DC/DC ASSYS...............................................122
10.21 POWER AMP ASSY (1/2).......................................................................................................................................124
10.22 POWER AMP ASSY (2/2).......................................................................................................................................126
10.23 PRE-STAGE AMP ASSY ........................................................................................................................................128
10.24 REGULATOR ASSY................................................................................................................................................130
11. PCB CONNECTION DIAGRAM ......................................................................................................................................133
11.1 AUDIO IN ASSY........................................................................................................................................................134
11.2 MAIN ASSY ..............................................................................................................................................................138
11.3 DSP & USB ASSY ....................................................................................................................................................142
11.4 FRONT IN ASSY.......................................................................................................................................................144
11.5 INTERFACE ASSY ...................................................................................................................................................146
11.6 HDMI & DVC ASSY (VSX-LX51) ..............................................................................................................................148
4
1
2 3 4
VSX-LX51
5
6 7 8
11.7 HDMI ASSY (VSX-1018AH) ..................................................................................................................................... 152
11.8 BINDER, BIND L FRONT and BIND L BACK ASSYS..............................................................................................154
11.9 BIND R FRONT and BIND R BACK ASSYS ............................................................................................................ 155
11.10 DISPLAY, MULTI JOG and POWER SW ASSYS ................................................................................................... 156
11.11 DIODE ASSY.......................................................................................................................................................... 160
11.12 HEADPHONE ASSY .............................................................................................................................................. 161
11.13 POWER AMP ASSY ............................................................................................................................................... 162
11.14 PRE-STAGE AMP ASSY ........................................................................................................................................ 166
11.15 PRIMARY ASSY ..................................................................................................................................................... 170
11.16 REGULATOR ASSY ............................................................................................................................................... 172
11.17 DC/DC ASSY.......................................................................................................................................................... 174
11.18 POSI1, POSI2 and POSI3 ASSYS......................................................................................................................... 175
12. PCB PARTS LIST............................................................................................................................................................ 176
A
B
C
D
E
F
VSX-LX51
5
6 7 8
5
1
• 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 °C.
Therefore, for lead-free soldering, the tip temperature of a soldering iron must be set to around 373 °C 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.
• Before removing the Power Amp Assy, it is neccessary to discharge C5721 and C5722.
For more detail, please refer to page 67.
2 3 4
1. SERVICE PRECAUTIONS
1.1 NOTES ON SOLDERING
A
B
C
1.2 CAUTION
D
E
F
6
1
2 3 4
VSX-LX51
2. SPECIFICATIONS
[1] Accessories
Remote Control Unit
(AXD7518: VSX-LX51)
(AXD7526: VSX-1018AH-K)
(AXD7527: VSX-1018AH-S)
Setup Microphone
(for Auto MCACC setup)
(APM7008)
AM Loop Antenna
(ATB7013)
FM Wire Antenna
(ADH7030)
AA/LR6 Dry Cell Batteries
(VEM1031)
SR+ mini-plug cable
(ADE7095)
SERVICE PARTS
2.1 ACCESSORIES
5
6 7 8
A
B
C
D
E
F
VSX-LX51
5
6 7 8
7
1
(LX51)
13.3 kg (1018AH)
2.2 SPECIFICATIONS
A
B
2 3 4
C
D
E
F
8
1
2 3 4
VSX-LX51
[1] Rear panel
VSX-LX51
5
2.3 PANEL FACILITIES
6 7 8
A
B
C
D
E
F
VSX-LX51
5
6 7 8
9
1
VSX-LX51
[2] Front panel
A
B
2 3 4
C
D
E
F
10
1
2 3 4
VSX-LX51
[3] Display
5
6 7 8
A
B
C
D
E
F
VSX-LX51
5
6 7 8
11
1
[4] Remote control
AXD7518
(VSX-LX51 Only)
A
B
2 3 4
C
D
E
F
12
1
2 3 4
VSX-LX51
5
6 7 8
A
B
C
D
E
F
VSX-LX51
5
6 7 8
13
1
To keep the product quality after servicing, confirm recommended check points shown below.
No.
Procedure 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 sound from headphone output. Sound must be normal, without noise.
7
Check the appearance of the product. No scratches or dirt on its appearance after receiving
it for service.
See the table below for the items to be checked regarding video and audio:
Items to be checked regarding video Item to be checked regarding audio
Block noise Distortion
Horizontal noise Noise
Dot noise Volume too low
Disturbed image (video jumpiness) Volume too high
Too dark Volume fluctuating
Too bright Sound interrupted
Mottled color
2 3 4
3. BASIC ITEMS FOR SERVICE
3.1 CHECK POINTS AFTER SERVICING
A
B
C
D
E
F
14
1
2 3 4
VSX-LX51
AUDIO IN ASSY
A
FRONT IN ASSY
D
DISPLAY ASSY
M
POWER SW
ASSY
O
MULTI JOG
ASSY
N
HEADPHONE ASSY
Q
REGULATOR ASSY
U
DC/DC ASSY
V
BINDER ASSY
H
POSI1 ASSY
W
POSI3 ASSY
Y
POSI2 ASSY
X
BIND_L_BACK
ASSY
J
BIND_L_FRONT
ASSY
I
PRIMARY
ASSY
T
PRE-STAGE AMP
ASSY
S
BIND_R_BACK
ASSY
L
BIND_R_FRONT
ASSY
K
HDMI&DVC ASSY
(VSX-LX51)
F
INTERFACE ASSY
E
DSP&USB ASSY
C
POWER AMP
ASSY
R
DIODE ASSY
P
HDMI ASSY
(VSX-1018AH-K,
VSX-1018AH-S)
G
MAIN ASSY
B
5
3.2 PCB LOCATIONS
6 7 8
A
B
C
D
E
VSX-LX51
5
6 7 8
F
15
1
LIST OF ASSEMBLIES
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.
NOTES:
Mark Symbol and Description
VSX-LX51
/HYSXJ5
VSX-1018AH-K
/YSXJ5
VSX-1018AH-S
/YSXJ5
NSP
1..MAIN ASSY AWK8053 AWK8058 AWK8058
1..AUDIO IN ASSY AWK8051 AWK8051 AWK8051
1..COMPLEX ASSY AWK8047 AWK8064 AWK8064
2..DISPLAY ASSY AWX9117 AWX9214 AWX9214
2..POWER SW ASSY AWX9118 AWX9118 AWX9118
2..MULTI JOG ASSY AWX9119 AWX9119 AWX9119
2..BINDER ASSY AWX9120 AWX9120 AWX9120
2..FRONT IN ASSY A
WX9121 AWX9121 AWX9121
2..HEADPHONE ASSY AWX9122 AWX9122 AWX9122
2..PRIMARY ASSY AWX9124 AWX9124 AWX9124
NSP 1..LOCAL POWER ASSY AWK8041 AWK8041 AWK8041
2..DIODE ASSY AWX8985AWX8985AWX8985
2..REGULATOR ASSY AWX8986AWX8986AWX8986
2..DC/DC ASSY AWX8988 AWX8988 AWX8988
2..PRE-STAGE AMP ASSY AWX8989AWX8989AWX8989
2..INTERFACE ASSY AWX8990
A
WX8990 AWX8990
NSP 1..AMP ASSY AWK8038 AWK8038 AWK8038
2..POWER AMP ASSY AWX8984AWX8984AWX8984
2..POSI1 ASSY AWX9132 AWX9132 AWX9132
2..POSI2 ASSY AWX9133 AWX9133 AWX9133
2..BIND_L_FRONT ASSY AWX9217 AWX9217 AWX9217
2..BIND_L_BACK ASSY AWX9218 AWX9218 AWX9218
2..BIND_R_FRONT ASSY AWX9219 AWX9219 AWX9219
2..BIND_R_BACK ASSY A
WX9220 AWX9220 AWX9220
2..POSI3 ASSY AWX9223 AWX9223 AWX9223
1..HDMI&DVC ASSY AWX9170 Not used Not used
FLASH ROM AYW7203
1..HDMI ASSY Not used AWX9131 AWX9131
FLASH ROM
1..DSP&USB ASSY
FLASH ROM
AYW7203 AYW7203
AWX9176 AWX9176 AWX9176
AYW7213 AYW7213 AYW7213
1..FM/AM TUNER UNIT AXX7248 AXX7248 AXX7248
Not used Not used
Not used
A
2 3 4
B
C
D
E
F
16
1
2 3 4
VSX-LX51
5
Name Jig No. Remarks
11P board to board extension jig
cable GGD1576
Diagonosis
19P board to board extension jig cable GGD1577
GGD1492
Diagonosis
Diagonosis
11P FFC
30P board to board extension jig cable
GGD1578
Diagonosis
RS-232C I/F jig GGF1348
Update the Flash ROMS
7-pin FFC VDA1681
Update the Flash ROMS
[1] Jigs list
3.3 JIGS LIST
6 7 8
A
B
C
D
E
F
VSX-LX51
5
6 7 8
17
1
VEF1040-A
VEF1040-A VEF1040-A
VEF1040-AVEF1040-A
VEF1040-A
VEF1040-A
JA3601
JA3631
JA3641
JA3651
VIDEO IN
AUDIO IN
OPT IN
USB
MIC IN
CN3601
CN3602
*CN3001 *CN3002
CN3003
JH3001JH3002
CN3401 CN3501
CN109
J51 ADD7635
33/610
for download
JP3001
D20PDD0305E
D20PDD0405E
JP3002
CN1001CN1002
CN801
CN4809
J0 ADX7619
9/470(Shielded Cable)
J52 ADD7636
11/390
CN702
CN101CN102
CN118
CN703
CN704
CN104CN103
CN601
JP113JP117JP116
CN1401
CN116
CN111CN119CN112
CN7001CN7003CN7002
PG02KA-E07
PG03KS-E07
PG02KA-E07
CN110
CN506
J54 ADD7637
11/100
CN501
J55 ADD7638
23/180
*CN117
for service
CN106 CN107 CN108
CN4803CN4802CN4801
CN502CN503
CN4806
CN4805
11/60
CN1
ADD7639
J56
CN507
*4
4/400
ADX7652
PF09PG-R35
9/350
PF07PG-R40
7/400
JP3710
D20PDY0620E
J**
JP****
CABLE WIRE
1.25mm FFC
2.0mm FLAT CABLE
1.25mm FFC CONNECTOR(L)
CN****
CN****
(*1.00mm FFC CONNECTOR)
(*1.00mm FFC CONNECTOR)
1.25mm FFC CONNECTOR(I)
JH****
CN****
2.0mm CABLE HOLDER
2.0mm WIRE TRAP
KM200NA*
CN****
CN****
CN****
B*B-EH
EH CONNECTOR
ANOTHER TYPE
CODE SOCKET
1.25mm B to B
XKM****
XKP****
CN****
CN****
CN****
TUC-P**X-B1
1.25mm B to B
2.0mm B to B SOCKET
TUC-P**P-B1
2.0mm B to B CONNECTOR
!
HYS,YS
*1
T1501
ATT7419
AC CORD
VDG1080
*2
HYS,YS
REK1061
(T5AL/250V)
FU1 FU2,3
-
FU4
AEK1060
(T4AL/250V)
FU5
(T3.15AL/250V)
AEK1059
FU6,7
AEK7072
(T800mAL/250V)
FU8,9
(T2.5AL/250V)
AEK1058
!
*3
CN**
BOARD IN WIRE
CN****
of identical designation.
be sure to use parts
The
the importance of the
Therefore, when replacing,
safety factor of the part.
component parts indicates
mark found on some
FRONT IN ASSY
(AWX9121)
D
DISPLAY ASSY
(VSX-LX51 : AWX9117)
(VSX-1018AH-K, VSX-1018AH-S
: AWX9214)
M
POWER SW ASSY
(AWX9118)
O
MULTI JOG ASSY
(AWX9119)
N
HDMI & DVC ASSY
(VSX-LX51 : AWX9170)
F
HDMI ASSY
(VSX-1018AH-K,
VSX-1018AH-S : AWX9131)
G
MAIN ASSY
(VSX-LX51 : AWK8053)
(VSX-1018AH-K,
VSX-1018AH-S : AWK8058)
B
BIND_L_FRONT
ASSY (AWX9217)
I
BIND_L_BACK
ASSY (AWX9218)
J
DSP & USB ASSY
(AWX9176)
C
BINDER ASSY
(AWX9120)
H
BIND_R_FRONT
ASSY (AWX9219)
K
BIND_R_BACK
ASSY (AWX9220)
L
INTERFACE ASSY
(AWX8990)
E
FM/AM TUNER
UNIT
(AWX7248)
POSI 1
ASSY
(AWX9132)
W
POSI 3
ASSY
(AWX9223)
Y
POSI 2
ASSY
(AWX9133)
X
2 3 4
4. BLOCK DIAGRAM
4.1 OVERALL WIRING DIAGRAM
A
B
C
D
E
F
18
1
2 3 4
VSX-LX51
5
CN504
CN4804
J58
19/165
ADD7641
CN6603
ADD7640
J57
17/75
CN505
CN6410 CN6110 CN6310 CN6610 CN6010 CN6510 CN6210
CN5410
CN5310
CN5210
CN5610
CN5010
CN5110 CN5510
CN5802
CN4807 CN4808
CN5803
CN4251
CN4004CN4003
CN4252
!
!
FU4
FU5
*3
!
FU6
FU7
!
FU8
FU9
!
!
CN4001
CN4071
JH3701
JP5750
PF04PG-R50
*3
MAIN TRANS
*1
!
T1501
FU2
FU3
FU1 !
!
!
CN3706 3709
CN3704
*3
CN5701
!
*2
AC CORD
JA3701
JA3702
CN4701
JH5801
CN3451
JP5801
D20PDY0460E
JP5701
ANOTHER TYPE
CN****
CN****
B to B SOCKET
ANOTHER TYPE
B to B CONNECTOR
HYS,YS
TUNER
MODULE
AXX7248
J56
ADD7637
FAN D-TERMINAL J59
--
-
*4 *5 *6
ADX7051
DC/DC ASSY
(AWX8988)
V
REGULATOR ASSY
(AWX8986)
U
PRIMARY ASSY
(AWX9124)
T
PRE-STAGE AMP ASSY
(AWX8989)
S
DIODE ASSY
(AWX8985)
P
HEADPHONE
ASSY
(AWX9122)
Q
POWER AMP ASSY
(AWX8984)
R
AUDIO IN ASSY
(AWK8051)
A
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.
4/500
6 7 8
A
B
C
D
E
F
VSX-LX51
5
6 7 8
19
1
S
A
F
G
C
D
R Q
ER
IC101
HDMI
RECEIVER
SII9135CTU
OPT IN1
OPT IN2
OPT IN3
COAX
COAX
BD
HDMI IN1
HDMI IN2
IC1151
HDMI
SELECTOR
VIDEO
VIDEO
USB
MIC
IC801
USB HOST
LC87F1HC8A
IC101
DIR&DIT
AK4114VQ
OPT OUT
HDMI
IC202
USB
SELECTOR
IC203
HDMI
SELECTOR
IC401
1st DSP
DSPA56720AG
RX3
2ch DAC
192kHz/24bit
×4
IC251
BASICAUDIO
SELECTOR
IC301
HDMI
TRANSMITTER
SII9134CTU
IC591
2ch ADC
96kHz/24bit
IC681
DAC for 2nd ZONE
192kHz/24bit
TX0
I2S
I2S
CD
CD-R
TV/SAT
DVR1
DVR2
TUNER Module
DVD
MULTI IN L/R
MULTI IN SL/SR
MULTI IN SBL/SBR
MULTI IN C/SW
PREOUT L/R
PREOUT SW
PREOUT SL/SR
PREOUT SBL/SBR
CD-R REC
DVR1 REC
DVR2 REC
ZONE2 OUT
IC501
Selector / Volume / PRE Amp
BD3473KS2
IC503
ZONE2
E-VOL
M61545FP
SP L/R
SP C
SP SL/SR
SP SBL/SBR
HP
LPF
SW DownMix
IC601
IC621
IC641
IC661
JA1152
JA1151
JA1102
JA102
JA103
JA104
JA101
(1/2)
LX51 Only
JA301
JA105
(1018AH:HDMI IN1−>BD)
JA101
(2/2)
JA3601
JA3631
JA3651
JA3641
IC701
IC741
IC761
IC781
IC801
IC502,IC702
JA502
JA505
JA503
JA503
JA504
JA504
SW PRE Amp
IC821
NJM4565MD
<<POWER AMP>>
JA502
JA505
JA503
JA504
JA3451
JA5801
JA5801
JA5801
JA5802
JA5802
JA506
JA506
JA507
JA507
JA5803
JA5803
JA5804
JA5804
PREOUT C
JA506
2 3 4
4.2 BLOCK DIAGRAM FOR AUDIO BLOCK
A
B
C
D
E
F
20
1
2 3 4
VSX-LX51
DET
Sync
C
TC74HC4051AFT
IC1202
+
+
C
Y
Y
C
Y
C
Y
C
CCYYY
TC74HC4051AFT
IC1201
CN102
11
CN3601
CN108
IC1006
17 22
13
PDC162A
+
+
+
IC1203
TC74HC4053AFT
LA7109
IC1205
+
C
Y
Y
C
161420
18
CN102
24
+
TC74HC4053AFT
+
IC1003
+
+
TC74HC4051AFT
IC1001
+
TC74HC4051AFT
IC1002
+
LA7109
IC1004
13
4
5
2
3
15
14
1
12
2117
14 23
13
4
2
15
5
3
14
1
12
13
4
2
15
5
3
14
13
14 31
11 25
7
3
12
5
1
2
4
15
433
351
5
3
4
17
12
13
2
1
15
14
14
7
11
21
23
31
25
12
1
4
13
2
15
5
3
4
14
1
12
1
33
35
CVOUT
C Selector
DVR 2
6dB AMP
MUTE
MUTE
OUT
DVR 2
DVR 1
Y Selector
TV/SAT
DVD
to DVC
VIDEO
from DVC
OSD IC
for Video
Selector
DVR 2
Selector
Input
DVR 1
TV/SAT
Selector
for DVC/Through
MUTE
C
Y MUTE
OUT
DVR 1
MONITOR
OUT
from DVC
to DVC
for OSD/Through (VSX-1018AH)
Selector
for DVC/Through (VSX-LX51)
6dB AMP
MUTE
MUTE
OUT
MONITOR
OUT
DVR 1
DVD
MUTE
MUTE
Input Selector
for MR Video & OSD
OUT
DVR 2
ZONE 2
OUT
• COMPOSITE BLOCK
FRONT-IN ASSY
INTERFACE ASSY
D
E
MAIN ASSY
B
• S-VIDEO BLOCK
9
10
11
9
10
11
51C
51B
51A
9
10
11
51C
51B
51A
9
10
11
S53ABC
9
10
11
51C
51B
51A
M51C
M51B
9
10
V53C
V53B
M51A
20
13
30
3
20
13
30
3
Buffer
Buffer
Buffer
LX51 Only
LX51 Only
1018AH Only
1018AH Only
1018AH Only
IC1271
MAIN
5
6 7 8
4.3 BLOCK DIAGRAM FOR VIDEO BLOCK
A
B
C
5
D
E
F
21
VSX-LX51
6 7 8
1
TC74LVX4052FT
IC1401
TC74LVX4053FT
IC1403
NJM2581M
IC1404
IC1402
TC74LVX4052FT
CN102
1
4
3
2
5
12
15
11
13
14
3
5
1
1
4
2
13
12
2
3
5
12
11
13
3
54
11
9
15
1
14
13
14
15
IN3
Cb
Cr
for DVC/Through
Y
Cr
IN2
Y
Cb
Cr
Cb
IN1
Selector
6dB AMP
Cr
Cb
COMPONENT OUT
Y
Y
Input Selector
Input Selector
from DVC
• COMPONENT BLOCK
MAIN ASSY
B
12 810 2 64
Buffer
Buffer
Buffer
9
10
C52A
C52B
9
10
C52A
C52B
9
10
11
C53ABC
to DVC
LX51 Only
1018AH Only
1018AH Only
COMPONENT
COMPONENT
COMPONENT
2 3 4
A
B
C
D
E
F
22
VSX-LX51
1
2 3 4
5
HDMI IN2
HDMI OUT
HDMI IN1
BD IN
JA1151
(19P)
JA1152
(19P)
IC1151
IC101
IC301
SD[1:3]
HDSPDIF
DCK
HSYNC
D[0:5,8:9, 12:15,24:27]
D[16:23]
D[28:35]
JA301
(21P)
IC1301
FLI2310-LF-CF
IP Convert/Scaler
IC1351
IS42S32200E-6TL
64M SDRAM
4
141612
20
CN1002
(30P)
IC401
ADV7800BSTZ-80
VIDEO DECODER
VCV IN
VCY
IC601
ADV7172KSTZ
VIDEO ENCODER
VCV OUT
VCC
VCCY OUT
VCCb OUT
VCCr
P[22:29]
HS
VS
IC1381
TC74LCX541FTS1
IC1383
TC74LCX541FTS1
TC74LCX541FTS1
IC1384
IC202
ICS571LMF
MCLKO,BCKO,LRCKO,SD[0:3]O,SPDIFO
CN1001
(30P)
IC501
PEG118A
HDMI CPU
IC502
AYW7243
4M Flash ROM
TC74VHC541FTS1
JA1102
(19P)
IC251
TC74LCX157FTS1
AUDIO SELECTOR
HDMI RECEIVER
HDMI TRANSMITTER
HDMI SELECTOR
HDMCLK
MCLK,SCK,WS,SD0
26-
BAMCK,BABCK,BALRCK,BADAT
IC203
TC7WH74FU
IC204
TC7WH157FU
IC205
TC7WH157FU
D[6:7,10:11
SCK,WS,SD0
F
6 7 8
4.4 BLOCK DIAGRAM FOR HDMI FOR VSX-LX51
A
B
C
D
E
F
VSX-LX51
5
6 7 8
23
1
HDMI IN
HDMI OUT
BD IN
JA1152
(19P)
IC101
IC301
SD[1:3]
HDSPDIF
DCK
VSYNCDEHSYNC
D[0:5,8:9,12:15,24:27
D[16:23]
D[28:35]
JA301
(21P)
8
10
12
18
20
24
CN1002
(30P)
IC401
ADV7800BSTZ-80
VIDEO DECODER
VCV IN
VCYINVCC IN
VCCY IN
VCCb IN
VCCr IN
P[22:29]
LLC
HS
VS
P[12:19]
IC1256
TC74LCX541FTS1
IC1257
TC74LCX541FTS1
TC74LCX541FTS1
IC1258
MCLKO,BCKO,LRCKO,SD[0:3]O,SPDIFO
6-15
CN1001
(30P)
IC501
PEG118A
HDMI CPU
IC502
AYW7243
4M Flash ROM
TC74VHC541FTS1
IC201
JA1102
(19P)
HDMCLK
MCLK,SCK,WS,SD0
26-
29
BAMCK,BABCK,BALRCK,BADAT
P[10:11,20:21]
D[6:7,10:11
SCK,WS,SD0
IC251
TC74LCX157FTS1
IC1259
TC7SZ125FU
G
HDMI RECEIVER
HDMI TRANSMITTER
AUDIO SELECTOR
2 3 4
4.5 BLOCK DIAGRAM FOR HDMI FOR VSX-1018AH
A
B
C
D
E
F
24
VSX-LX51
1
2 3 4
5
IC808
341S2154
IC851
TC74VHC157
IC802
AAT4618
CN801
D+
D-
SPI_SIMO
SPI_UCLK
SPI_nSS
CPRST
CPRDY
SPI_SOMI
UMCKIMCK
OSCU
ULR
UBCK
MSSS
ILRCK
IBCLK
MSCK
ISDAT
MSDA
UDT
to IC202
IPIF_SW
UASW
USBCTL
V5USB
D-
D+
GNDD
V5DU
XFLAG
CN701
CN702(KU model)
IPIF SW
USB AUDIO SW
USB CTRL
USB XFLAG
CN704
V+5D
(from IC503)
24.576MHz
from IC705Q871
Q872
USB POWER
USB RESET
USB DAI
USB DAO
IC801
PDC180A8
USB U-Com
(FLASH built-in)
5=>3
3=>5
IC701
IC702
12
11
218
V+3DU V3D
V+3DU
V+3DU
V+3DU
37
38
USBREQ
OSCU
(from IC401 83p)
Audio OUTPUT
28
3427332631
18
USBRST
USB DAI
USB DAO
12
13
14
22
21
1
45
44
2
15
USBREQ
46
Digital Audio
Signal selector
SW
USB Power SW
iPod
authentication
IC
USB Bus Power
Control
(Over Current
detection)
USB Block DSP Block
Digital Audio Signal Output
C
C
6 7 8
4.6 BLOCK DIAGRAM FOR USB BLOCK
A
B
C
D
5
E
6 7 8
VSX-LX51
F
25
1
u-com
RENESUS
M32C/87
DPS Control
144pin
OSD IC
HDMI Control
u-com
RENESUS
M16C/62P
HDMI/DVC
VIDEO SW IC
DSP
Expantion
Port IC
TUNER
MODULE
RDS IC
VOLUME
FUNCTION
IC
FL
USB
(SANYO
USB)
EEPROM
64kbyte
PE5615A-K
FL Driver
u-com (100p, 5V)
•FL,LED
PDC158A8
Event u-com
(100p, 5V)
•KEY,REMOTE
MAIN
IC801
IC401
IC401
IC601
(LX51 only)
IC1005
IC3001
V3001
IC3004
IC1006
IC261
IC501
IC1405
IC501
IC202
IC101
IC1001,IC1002,IC1003
IC1201,IC1202,IC1203
IC1401,IC1402,IC1403
A
F G
F G
C
C
M
M
M
B
B
B
B
B
B
2 3 4
4.7 BLOCK DIAGRAM FOR U-COM
A
B
C
D
E
F
26
1
2 3 4
VSX-LX51
5
MAIN ASSY
REGULATOR ASSY
PRIMARY ASSY
FU1
T3701
STBY
TRANSFORMER
ATT7040(HYS)
RY
IC3701
NJM78M56
+5.6V
AC
T1501
POWER
TRANSFORMER
ATS7419(HYS)
IC4004
NJM78M05
+5V
IC4005
NJM78M56
+5.6V
IC4006
NJM79M05
-5.6V
FL POWER
SUPPLY
BLOCK
IC5763
BA178M12
+12V
IC5751
NJM78M12
+12V
IC5752
NJM79M12
-12V
VL SELECTOR
+VH
SUPPLY
BLOCK
-VH
SUPPLY
BLOCK
POWER AMP ASSY
IC4251
PQ1CG3032
+5V
DC/DC ASSYHDMI ASSY
DSP ASSY
V+5AD
V+13UN
V+5D
VIDEO BLOCK
V-5.6V
V+5.6V
DISPLAY ASSY
IC3001
FL
u-com
IC3004
EVENT
u-com
LED BLOCK
KEY BLOCK
IC101
MAIN
u-com
MUTE Logic
232C Logic
RDS / Logic
3-5 / 5-3
V+5.6U
V+5.6ST
FL AC
V-VF
FL
DISPLAY
POWER AMP
BLOCK
±VL
PRESTAGE-AMP
ASSY
±VH
INTERFACE
ASSY
FRONT IN ASSY
AUDIO
ASSY
12V
TRG
232C
/ IR
V+12TRG
±7V
Rough
Lock
V+5OPT
V±7A
IC501
E-VOL
V±12A
LPF
PRE Amp
TUNER Module
V+9T
VSX model only
+9V
Rough
Lock
V+12T
+5V
Rough
Lock
+3V
Rough
Lock
-5V
Rough
Lock
-3V
Rough
Lock
V-3C
V+3C
V-5V
V+5V
IC1001
BD9011KV
+3.3/2.5V
IC1071
NJM78M05
+5V
IC1051
PQ200WNA1
+5V
IC704
BD9107FVM
+1V
IC705
PQ1LAX95M
+3.3V
A/D
comv.
R
U
S
E
A
V
F
G
C
D
M
B
T
6 7 8
4.8 BLOCK DIAGRAM FOR POWER SUPPLY BLOCK
A
B
C
D
5
6 7 8
VSX-LX51
E
F
27
1
Step 1: MUTE pin
Replace IC401.
Check the IC705.
Replace IC705.
To Step 2
To Step 4
Step 0: Preliminary confirmation
Confirm the following items before checking
Do screws
of COAX Jack
securely tighten
?
Tighten screws securely.
Note:
If this section is not fixed,
the GND for DSP module
may lifted from the chassis
and cause instable potential
and lead to product failures.
No
Ye s
To Step 1
IC401 (Pin 84)
Is the
voltage of output
signal 0 V
?
No
Ye s
DS0MUT3
Step 3: Regulator IC
Check the IC704 and
REGULATOR Assy.
Check the Q601 and
REGULATOR Assy.
IC704 (Pins 7,8)
Is the
voltage of around
5 V to 5.3 V
input?
No
Ye s
(to chassis)
IC705 (Pin 5)
Is the
voltage of 3.3 V
output?
No
(to chassis)
IC705 (Pin 4)
Is the
voltage of around
5 V to 5.3 V
output?
No
Ye s
Ye s
Replace IC704.
L705, L704 (stby side)
Is the
voltage of 1 V
output?
No
Ye s
(to chassis)
Replace Q601 and Q561.
Q601 (Pins 1, 2, 5, 6)
Is the
voltage of 5 V
output?
No
Is the
voltage of 5 V
input?
Q601 (Pin 4)
No
Ye s
Ye s
(to chassis)
(to chassis)
Part shape and Pin arrangement
of IC705
Step 2: BtoB connector and FFC
CN702, CN703, CN704, CN801
Are the
connectors securely
inserted?
Turn the power off and
insert the connectors
securely.
No
Ye s
CN601
Is the
FFC securely
inserted?
Turn the power off and
insert the connectors
securely.
No
Ye s
To Step 3
BtoB connector
FFC
Simplified diagnosis
Errors in DSP Assembly (Areas simply and roughly predictable by machine operation only)
• Sound abnormality in Delay
If sound abnormality does not occur in the Delay OFF state but occurs in the Delay ON state, it is most likely
that a failure has occurred in SDRAM (IC301) or LATCH (IC303, IC304) in the 1st DSP Block.
• No sound at analog signal input
If sound abnormality does not occur with a digital signal input (COAX, OPT) but occurs only with an analog signal input,
it is most likely that a failure has occurred in the AD converter (IC591).
Troubleshooting
[1] DSP Troubleshooting
2 3 4
5. DIAGNOSIS
5.1 DIAGNOSIS FLOWCHART
A
B
C
D
E
F
28
1
VSX-LX51
2 3 4
5
Step 7-1: DIR
Step 7
A
To Step 6
Check the parts and patterns
in the path.
Check the HDMI ASSY, and the parts
and patterns in the path.
IC701
Do
convert 5 V into
3 V for input?
Replace IC701.
No
Ye s
Check the OPTICAL IN JACK,
and parts and patterns in the path.
Check the pattern to pin 10 of IC851.
Replace IC851.
Check the FRONT IN ASSY, and
parts and patterns in the path.
IC101 (Pins 1, 3, 5 (VSX-LX51 only))
OPTICAL
Check that the S/PDIF signal is output.
Check that changes by pulling out and inserting the
digital input lines.
When the COAX or OPT is input, go to Step 7-1.
When the USB is input, go to Step 7-2.
When the HDMI (SPDIF line) is input, go to Step 7-1.
Used Source
[dts HD High Resolution Audio], [dts HD LBR],
[Dolby Digital Plus], [2ch of 48kHz sampling rate or less],
[Other compression stream]
When the HDMI (I2S line) is input, go to Step 7-3.
Used Source
[dts HD Master Audio], [Dolby True HD],
[PCM or LPCM of 88.2kHz sampling rate or more],
[LPCM Multi ch]
When the HDMI (SACD) is input, go to Step 7-5.
Used Source [SACD]
Can
observe the
digital signal
?
No
(0 V ⇔ 4 V)
Ye s
(0 V ⇔ 4 V)
IC101 (Pins 42, 44)
COAX
Can
observe the
digital signal
?
No
Ye s
Ye s
Check that it changes in the Playback and Pause modes of
the HDMI.
(0 V ⇔ 3.3 V)
IC101 (Pin 48)
From HDMI ASSY
Can
observe the
digital signal
?
No
(1.65 V center, amplitude more than 0.2 Vp-p)
IC101 (Pin 7)
FRONT OPTICAL
Can
observe the
digital signal
?
No
Ye s
Step 6: X'tal
To Step 7
Replace IC503 or X531.
Ye s
IC503 (Pin 6)
No
Is there
a 24.576 MHz
output?
Check the pattern to pin 30 of IC101.
Replace IC101.
IC503 (Pin 12)
No
Is there
a 24.576 MHz
output?
Check the pattern to pin 80 of IC401.
Replace IC401.
Ye s
Ye s
IC503 (Pin 10)
No
Is there
a 24.576 MHz
output?
Ye s
IC503 (Pin 8)
No
Is there
a 24.576 MHz
output?
Step 5: 5 V to 3 V conversion
Step 4: 3 V to 5 V conversion
IC702
Do
convert 3 V into
5 V for input?
To Step 5
Replace IC702.
No
Ye s
6 7 8
A
B
C
D
5
VSX-LX51
6 7 8
E
F
29
1
Replace IC101.
Ye s
IC101 (Pin 26)
DIRB (Bit clock)
No
Is there
a bit clock
output?
(0 V ⇔ 3.3 V)
To Step 7-3
Ye s
IC202 (Pin 4)
S2DT (Data)
Is there
a data
output?
(0 V ⇔ 3.3 V)
Ye s
IC202 (Pin 7)
S2BC (Bit clock)
Is there
a bit clock
output?
(0 V ⇔ 3.3 V)
Ye s
IC202 (Pin 12)
S2LR (LR clock)
Is there
a LR clock
output?
(0 V ⇔ 3.3 V)
To Step 7-2
Ye s
IC202 (Pin 9)
S2MC (Master clock)
Is there
a master clock
output?
(0 V ⇔ 3.3 V)
Replace IC202.
At COAX, OPT, HDMI or SPDIF input
Check the path
between Pin 1 of IC202
and microcomputer.
Check the path
between Pin 1 of IC202
and microcomputer.
No
No
No
No
No
Is the
voltage Pin 1 of
IC202 at
0 V?
Ye s
Replace IC202.
At USB input
No
Is the
voltage pin 1
of IC202 at
5 V?
Ye s
Step 7-2: Switch
Check that the data and clock signals are output.
A
Replace IC101.
(0 V ⇔ 3.3 V)
Ye s
IC101 (Pin 24)
DIRL (LR clock)
No
Is there
a LR clock
output?
Replace IC101.
(0 V ⇔ 3.3 V)
Ye s
IC101 (Pin 25)
DIRD (Data)
No
Is there
a data
output?
Replace IC101.
(0 V ⇔ 3.3 V)
Check the other assy.
(peripheral circuit of
the microcomputer)
IC101 (Pin 23)
DIRM (Master clock)
No
No
Ye s
Is there
a master clock
output?
Is the
voltage Pin 31
(PDN input signal)
of IC101 at
5 V?
No
Check that the data and clock signals are output.
A
2 3 4
B
C
D
E
F
30
1
2 3 4
VSX-LX51
Loading...