Pioneer VSX-74TXVi User 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 2005
STANDBY/ON

AUDIO/VIDEO MULTI-CHANNEL RECEIVER VSX-74TXVi
INPUT
SELECTOR MASTER
VOLUME
PHASE
CONTROL
MCACC
POSITION
AUTO SURR/
STREAM DIRECT
PHASE
CONTROL
DIGITALPRECISION
PROCESSING
HOME
THX
STANDARD
SURROUND
ADVANCED
SURROUND
VSX-74TXVi
PROVISIONAL
AUDIO/VIDEO MULTI-CHANNEL RECEIVER
VSX-74TXVi
VSX-74TXVi-S
VSX-72TXV
VSX-72TXV-S
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
Model Type Power Requirement Remarks
VSX-74TXVi KUXJ/CA AC120V
VSX-74TXVi-S KUXJC AC120V
VSX-72TXV KUXJ/CA AC120V
VSX-72TXV-S KUXJC AC120V
For details, refer to "Important Check Points for Good Servicing".
T-ZZK AUG. 2005 printed in Japan

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SAFETY INFORMATION
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.
WARNING
This product contains lead in solder and certain electrical parts contain chemicals which are known to the state of California to
cause cancer, birth defects or other reproductive harm.
Health & Safety Code Section 25249.6 – Proposition 65
NOTICE
(FOR CANADIAN MODEL ONLY)
Fuse symbols (fast operating fuse) and/or (slow operating fuse) on PCB indicate that replacement
parts must be of identical designation.
REMARQUE
(POUR MODÈLE CANADIEN SEULEMENT)
Les symboles de fusible (fusible de type rapide) et/ou (fusible de type lent) sur CCI indiquent que
les pièces de remplacement doivent avoir la même désignation.
ANY MEASUREMENTS NOT WITHIN THE
LIMITS OUTLINED ABOVE ARE INDICATIVE
OF A POTENTIAL SHOCK HAZARD AND
MUST BE CORRECTED BEFORE RETURN-
ING 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.
(FOR USA MODEL ONLY)
1. SAFETY PRECAUTIONS
The following check should be performed for the
continued protection of the customer and service
technician.
LEAKAGE CURRENT CHECK
Measure leakage current to a known earth ground
(water pipe, conduit, etc.) by connecting a leakage
current tester such as Simpson Model 229-2 or
equivalent between the earth ground and all exposed
metal parts of the appliance (input/output terminals,
screwheads, metal overlays, control shaft, etc.). Plug
the AC line cord of the appliance directly into a 120V
AC 60 Hz outlet and turn the AC power switch on. Any
current measured must not exceed 0.5 mA.
Device
under
test
Leakage
current
tester
Earth
ground
Reading should
not be above
0.5 mA
Also test with
plug reversed
(Using AC adapter
plug as required)
Test all
exposed metal
surfaces
AC Leakage Test

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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.
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.
1Use specified parts for repair.
Use genuine parts. Be sure to use important parts for safety.
2Do 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.
3Make 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)
4Make sure the screws are tightly fastened.
Please be sure that all screws are fastened, and that there are no loose screws.
5Make sure each connectors are correctly inserted.
Please be sure that all connectors are inserted, and that there are no imperfect insertion.
6Make 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.
7Make sure screws and soldering scraps do not remain inside the product.
Please check that neither solder debris nor screws remain inside the product.
8There 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.
9There 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.
0Safe 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.

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CONTENTS
SAFETY INFORMATION..................................................................................................................................... 2
1. SPECIFICATIONS ............................................................................................................................................ 6
2. EXPLODED VIEWS AND PARTS LIST ............................................................................................................ 8
2.1 PACKING ................................................................................................................................................... 8
2.2 EXTERIOR............................................................................................................................................... 10
2.3 CHASSIS SECTION ................................................................................................................................ 12
2.4 REAR PANEL SECTION.......................................................................................................................... 14
2.5 POWER AMP BLOCK.............................................................................................................................. 16
2.6 FRONT PANEL SECTION ....................................................................................................................... 18
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM..........................................................................................20
3.1 BLOCK DIAGRAM ................................................................................................................................... 20
3.1.1 OVERALL BLOCK DIAGRAM ........................................................................................................... 20
3.1.2 COMPOSITE V BLOCK DIAGRAM................................................................................................... 22
3.1.3 S-VIDEO BLOCK DIAGRAM............................................................................................................. 23
3.1.4 COMPONENT &VOL BLOCK DIAGRAM.......................................................................................... 24
3.1.5 DSP BLOCK DIAGRAM .................................................................................................................... 25
3.1.6 HDMI & DVC BLOCK DIAGRAM....................................................................................................... 26
3.1.7 MICROCOMPUTER BLOCK DIAGRAM ........................................................................................... 27
3.2 OVERALL WIRING CONNECTION DIAGRAM........................................................................................ 28
3.3 AUDIO & MULTI CH IN ASSY.................................................................................................................. 30
3.4 V-AUDIO ASSY ........................................................................................................................................ 32
3.5 FRONT-IN and HEADPHONE ASSYS..................................................................................................... 34
3.6 BRIDGE1, BRIDGE2, TRANS SIDE and BRIDGE3 ASSYS ................................................................... 36
3.7 COMPOSITE V ASSY.............................................................................................................................. 38
3.8 S-VIDEO ASSY........................................................................................................................................ 40
3.9 COMPONENT & VOL ASSY (1/4) ........................................................................................................... 42
3.10 COMPONENT & VOL ASSY (2/4) ......................................................................................................... 44
3.11 COMPONENT & VOL ASSY (3/4) ......................................................................................................... 46
3.12 COMPONENT & VOL ASSY (4/4) ......................................................................................................... 48
3.13 DIGITAL MOTHER ASSY (1/8) .............................................................................................................. 50
3.14 DIGITAL MOTHER ASSY (2/8) .............................................................................................................. 52
3.15 DIGITAL MOTHER ASSY (3/8) .............................................................................................................. 54
3.16 DIGITAL MOTHER ASSY (4/8) .............................................................................................................. 56
3.17 DIGITAL MOTHER ASSY (5/8) .............................................................................................................. 58
3.18 DIGITAL MOTHER ASSY (6/8) .............................................................................................................. 60
3.19 DIGITAL MOTHER ASSY (7/8) .............................................................................................................. 62
3.20 DIGITAL MOTHER ASSY (8/8) .............................................................................................................. 64
3.21 DSP ASSY (1/2)..................................................................................................................................... 66
3.22 DSP ASSY (2/2)..................................................................................................................................... 68
3.23 INTERFACE ASSY ................................................................................................................................ 70
3.24 POWER AMP IN and POWER PROTECT ASSYS................................................................................ 72
3.25 POWER AMP L ASSY ........................................................................................................................... 74
3.26 POWER AMP R ASSY........................................................................................................................... 76
3.27 LOCAL SUPPLY and DC/DC ASSYS .................................................................................................... 78
3.28 TRANS2-1, VH-TR, DIODE and SP/PS ASSYS .................................................................................... 80
3.29 TRANS2-2, TRANS1 and PRIMARY ASSYS.........................................................................................82
3.30 VOLUME, DISPLAY and INPUT SELECT ASSYS................................................................................. 84
3.31 PREOUT & CONTROL ASSY................................................................................................................ 86
3.32 1394 ASSY (1/2) .................................................................................................................................... 88
3.33 1394 ASSY (2/2) .................................................................................................................................... 90
3.34 HDMI&DVC ASSY (1/2) ......................................................................................................................... 92
3.35 HDMI&DVC ASSY (2/2) ......................................................................................................................... 94
4. PCB CONNECTION DIAGRAM ..................................................................................................................... 96
4.1 PRIOUT&CONTROL ASSY..................................................................................................................... 97
4.2 AUDIO&MULTI CH IN ASSY.................................................................................................................... 98
4.3 V-AUDIO ASSY ........................................................................................................................................ 99
4.4 HEAD PHONE and FRONT-IN ASSYS.................................................................................................. 100
4.5 BRIDGE1 and BRIDGE2 ASSYS .......................................................................................................... 101
4.6 TRANS SIDE and BRIDGE3 ASSYs ..................................................................................................... 102
4.7 COMPOSITE V ASSYS ......................................................................................................................... 104
4.8 S-VIDEO ASSY...................................................................................................................................... 105
4.9 COMPONENT&VOL ASSY.................................................................................................................... 106
4.10 DIGITAL MOTHER ASSY .................................................................................................................... 110
4.11 DSP ASSY ........................................................................................................................................... 114
4.12 INTERFACE ASSY .............................................................................................................................. 116

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4.13 POWER AMP IN ASSY ........................................................................................................................120
4.14 POWER PROTECT ASSY....................................................................................................................121
4.15 POWER AMP L and POWER AMP R ASSYS......................................................................................122
4.16 LOCAL SUPPLY and DC/DC ASSYS ...................................................................................................126
4.17 TRANS2-1, VH TR, DIODE and TRANS2-2 ASSYS ............................................................................128
4.18 SP/PS ASSY.........................................................................................................................................130
4.19 TRANS1 and PRIMARY ASSYS ..........................................................................................................132
4.20 VOLUME, DISPLAY and INPUT SELECT ASSYS ...............................................................................134
4.21 HDMI&DVC ASSY ................................................................................................................................138
4.22 1394 ASSY ...........................................................................................................................................140
5. PCB PARTS LIST ..........................................................................................................................................141
6. ADJUSTMENT ..............................................................................................................................................188
7. GENERAL INFORMATION ...........................................................................................................................189
7.1 DIAGNOSIS............................................................................................................................................189
7.1.1 TEST MODE.....................................................................................................................................189
7.1.2 PROTECTION CIRCUIT SPECIFICATION ......................................................................................193
7.1.3 TROUBLESHOOTING THE DSP BLOCK ........................................................................................195
7.1.4 DIAGNOSIS OF THE HDMI BLOCK AND RELATED SYSTEMS ....................................................203
7.1.5 FLOWCHART OF CONNECTION DIAGNOSIS OF THE HDMI BLOCK .........................................216
7.1.6 DIAGNOSIS OF THE 1394 ASSY....................................................................................................219
7.1.7 iPod INFORMATION.........................................................................................................................224
7.1.8 XM RADIO INFORMATION..............................................................................................................226
7.1.9 HOW TO REWRITE THE DSP FLASH ROM BY PLAYING BACK A CD.........................................227
7.1.10 HOW TO REWRITE THE FLASH ROMS FOR VARIOUS MICROCOMPUTERS..........................230
7.1.11 DISASSEMBLY ..............................................................................................................................233
7.1.12 FAILURE DIAGNOSIS OF THE POWER AMP BLOCK .................................................................242
7.2 PARTS ....................................................................................................................................................243
7.2.1 IC......................................................................................................................................................243
8. PANEL FACILITIES .......................................................................................................................................275

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1. SPECIFICATIONS
possible modifications without notice, due to
Output Claims for Amplifiers
5 Hz to 100,000 Hz
180 W + 180 W (74TXVi)
140 W + 140 W (74TXVi)
Specifications
Amplifier section
Continuous average power output of 140 (or 130)
watts* per channel, min., at 8 ohms, from 20 Hz
to 20,000 Hz with no more than 0.09%** total
harmonic distortion (front).
Continuous Power Output (20Hz-20kHz, 8Ω, 0.09%)
Front . . . . . . . . . . . . . . . . 130 W + 130 W (72TXV)
Center . . . . . . . . 130 W (72TXV), 140 W (74TXVi)
Surround . . . . . . . . . . . . . 130 W + 130 W (72TXV)
140 W + 140 W (74TXVi)
Surround back . . . . . . . . 130 W + 130 W (72TXV)
140 W + 140 W (74TXVi)
Continuous Power Output (1 kHz, 6 Ω, 1.0%)
Front . . . . . . . . . . . . . . . . 160 W + 160 W (72TXV)
Center . . . . . . . . 160 W (72TXV), 180 W (74TXVi)
Surround . . . . . . . . . . . . . 160 W + 160 W (72TXV)
180 W + 180 W (74TXVi)
Surround back . . . . . . . . 160 W + 160 W (72TXV)
180 W + 180 W (74TXVi)
Total harmonic distortion . . . . . . . . . . . . . . . 0.05%
(20 Hz-20 kHz, 120 W, 8 Ω) (72TXV)
(20 Hz-20 kHz, 130 W, 8 Ω) (74TXVi)
Audio Section
Input (Sensitivity/Impedance)
LINE . . . . . . . . . . . . . . . . . . . . . 335 mV/47 kΩ
Frequency Response (LINE) . . . . . . . . . . . . . . . . .
dB
Output (Level/Impedance)
REC . . . . . . . . . . . . . . . . . . . . . 335 mV/2.2 kΩ
Tone Control
BASS . . . . . . . . . . . . . . . . . . . ±6 dB (100 Hz)
TREBLE . . . . . . . . . . . . . . . . . ±6 dB (10 kHz)
LOUDNESS . . . . . . +4/+2 dB (100Hz/10 kHz)
(at volume position -40 dB)
Signal-to-Noise Ratio (IHF, short circuited, A network)
LINE . . . . . . . . . . . . . . . . . . . . . . . . . . . 103 dB
Signal-to-Noise Ratio [EIA, at 1W (1kHz)]
LINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 dB
* Measured pursuant to the Federal Trade
Commission’s Trade Regulation rule on Power
** Measured by Audio Spectrum Analyzer
Composite Video / S-Video Section
Input (Sensitivity/Impedance) . . . . . . 1 Vp-p/75 Ω
Output (Level/Impedance) . . . . . . . . . 1 Vp-p/75 Ω
Signal-to-Noise Ratio . . . . . . . . . . . . . . . . . . 65 dB
Frequency Response . . . . . . . . . . 5 Hz to 10 MHz
Component Video Section
Input (Sensitivity/Impedance) . . . . . . . 1 Vp-p/75 Ω
Output (Level/Impedance) . . . . . . . . . 1 Vp-p/75 Ω
Signal-to-Noise Ratio . . . . . . . . . . . . . . . . . . 65 dB
Frequency Response . . . . . . . . . 5 Hz to 100 MHz
FM Tuner Section
Frequency Range . . . . . . . . 87.5 MHz to 108 MHz
Usable Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . .
Mono: 13.2 dBf, IHF (1.3 µV/75 Ω)
50 dB Quieting Sensitivity . . . . . . . Mono: 20.2 dBf
Stereo: 38.6 dBf
Signal-to-Noise Ratio . . . . Mono: 73 dB (at 85 dBf)
Stereo: 70 dB (at 85 dBf)
Distortion . . . . . . . . . . . . . . . . Stereo: 0.5% (1 kHz)
Alternate Channel Selectivity . . . . 60 dB (400 kHz)
Stereo Separation . . . . . . . . . . . . . . 40 dB (1 kHz)
Frequency Response . . . . 30 Hz to 15 kHz ±1dB
Antenna Input . . . . . . . . . . . . . . . 75 Ωunbalanced
AM Tuner Section
Frequency Range . . . . . . . . 530 kHz to 1,700 kHz
Sensitivity (IHF, Loop antenna) . . . . . . . 350 µV/m
Selectivity . . . . . . . . . . . . . . . . . . . . . . . . . . 25 dB
Signal-to-Noise Ratio . . . . . . . . . . . . . . . . . . 50 dB
Antenna . . . . . . . . . . . . . . . . . . . . . . Loop antenna
Miscellaneous
Power Requirements . . . . . . . . . . AC 120 V, 60 Hz
Power Consumption . . . . . . . . . . . 530 W, 690 VA
In standby . . . . . . . . . . . . . . . . . Less than 0.6 W
AC Outlet . . . . . . . . . . . . . (switched) 100 W MAX.
Dimensions . . . . . 420 (W) x 187 (H) x 462 (D) mm
(169/16 (W) x 73/8(H) x 181/4(D)in.)
Weight (without package) . . . . . . . . . . . . . . . . . . . .
16.0 kg (35.3 lb) (74TXVi)
15.9 kg (35.1 lb) (72TXV)
Furnished Parts
Setup microphone (for Auto MCACC setup) . . . . 1
AA/IEC R6P dry cell batteries . . . . . . . . . . . . . . . 2
Remote control unit . . . . . . . . . . . . . . . . . . . . . . . 1
AM loop antenna . . . . . . . . . . . . . . . . . . . . . . . . .1
FM wire antenna . . . . . . . . . . . . . . . . . . . . . . . . . 1
Audio control cable for iPod . . . . . . . . . . . . . . . . 1
Warranty card . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Operating instructions
Note
Specifications and the design are subject to
improvements.
Cleaning the unit
Use a polishing cloth or dry cloth to wipe off dust
and dirt.
When the surface is dirty, wipe with a soft cloth
dipped in some neutral cleanser diluted five or
six times with water, and wrung out well, and
again with a dry cloth. Do not use furniture wax
or then wipe cleansers.
Never use thinners, benzine, insecticide sprays
or other chemicals on or near this unit, since
these will corrode the surface.

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Accessories
AM Loop Antenna
(ATB7013)
Remote Control Unit
(AXD7409)
Setup Microphone
(for Auto MCACC setup)
(APM7006)
FM Wire Antenna
(ADH7030)
AA/IEC R6P Dry Cell Batteries
SLEEP
+10
SR+
ANALOG
ATT
DISC
VIDEO
SEL
DIMMER
CLASS
D.ACCESS
RECEIVER SOURCE
SYSTEM OFF
INPUT
SELECT
ENTER
TV CONTROL
SHIFT
VOL
DVD SAT VIDEO 1 TVCONT
DVR1
TUNE
TUNE
ST ST
STATUS
MCACC
S.DIRECT
MULTI OPE
SIGNAL SEL
SBch STEREO
MEMORY
TV CH
INPUT
SELECT
MPX
AUDIO
SUBTITLE
ADV. SURRSTANDARD
PHASE
THX
DTV INFO MUTE
REC
TV VOL
i Pod TUNER RECEIVER
ENTER
REC STOP
HDD
CH CH
DVD
AV PARAMETER
TOP MENU 
DTV MENU
CH LEVEL
MENU
T.EDIT
BAND
GUIDE

RETURN SETUP
CATEGORY
CD
DVR2 CD-R
TV VIDEO 2
XM RADIO ROOM2/3
DISP
RECEIVER

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2. EXPLODED VIEWS AND PARTS LIST
2.1 PACKING
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.)
NOTES:
12
10
8
11
16
9
2
3
4
7
15
13
14
6
5

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(1) PACKING SECTION PARTS LIST
(2) CONTRAST TABLE
VSX-74TXVi/KUXJ/CA, VSX-74TXVi-S/KUXJC, VSX-72TXV/KUXJ/CA and VSX-72TXV-S/KUXJC are constructed
the same except for the following:
Mark No. Description Part No.
1Audio Control Cable for iPod ADE7119
2 FM Wire Antenna ADH7030
3 AM Loop Antenna ATB7013
4 Setup Microphone APM7006
(for Auto MCACC setup)
5 Remote Control Unit AXD7409
6 Battery Cover XZN3140
NSP 7 AA/IEC R6P Dry Cell Batteries VEM1031
8 Operating Instructions ARB7334
(English)
9 Operating Instructions ARE7600
10 Caution Sheet SP, E ARM7056
NSP 11 Warranty Card ARY7007
NSP 12 Polyethylene Bag AHG7117
13 Packing Sheet RHC1023
14 Front Pad 74 AHA7446
15 Rear Pad 74 AHA7447
16 Packing Case See Contrast table (2)
Mark No. Symbol and Description VSX-74TXVi
/KUXJ/CA
VSX-74TXVi-S
/KUXJC
VSX-72TXV
/KUXJ/CA
VSX-72TXV-S
/KUXJC
16 Packing Case AHD8345 AHD8396 AHD8346 AHD8397

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2.2 EXTERIOR
CONTACT SIDE
NON-CONTACT
SIDE
Refer to
"2.6 FRONT PANEL SECTION".
4
Refer to
"2.3 CHASSIS SECTION".
5
3
4
2
1
8
8
8
9
9
6
8
8

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(1) EXTERIOR SECTION PARTS LIST
(2) CONTRAST TABLE
VSX-74TXVi/KUXJ/CA, VSX-74TXVi-S/KUXJC, VSX-72TXV/KUXJ/CA and VSX-72TXV-S/KUXJC are constructed
the same except for the following:
Mark No. Description Part No.
1 Bonnet See Contrast table (2)
2 Left Beam 45 ANG7401
3 Center Beam V1 ANG7482
4 Insulator AMR7198
NSP 5 Energy Star Label AAX8022
6 Label (DD/DTS/THX) ARW7320
7iPod Label ARW7326
8 Screw See Contrast table (2)
9 Screw See Contrast table (2)
Mark No. Symbol and Description VSX-74TXVi
/KUXJ/CA
VSX-74TXVi-S
/KUXJC
VSX-72TXV
/KUXJ/CA
VSX-72TXV-S
/KUXJC
1 Bonnet 74B AZN8006 Not used AZN8006 Not used
1 Bonnet AX4S Not used AZN8008 Not used AZN8008
8 Screw BCZ40P060FTB BCZ40P060FNI BCZ40P060FTB BCZ40P060FNI
9 Screw BBZ30P080FTB BBZ30P080FNI BBZ30P080FTB BBZ30P080FNI

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2.3 CHASSIS SECTION
CONTACT SIDE
NON-CONTACT
SIDE
B
C
C
G
G
H
H
I
J
J
K
K
O
P
P
O
L
L
M
M
N
N
I
D
D
E
P
P
E
F a
F a
F b
F b
B
A
A
T
N
L
M
E
S
G
YZU
W
X
V
AG
AF
AA
HEADPHONE
CN3551
DISPLAY
3202
Refer to
"2.5 POWER AMP BLOCK".
Refer to
"2.4 REAR PANEL SECTION".
52
52
52
52
52
21
4
7
9
13
27
10
8
16
3
20
19
28
30
44 43
31
32
41
22
45
40
39
12
45
34
39
39
34
46
35
36
29
14
39 6
42
51
51
52
17
18
5
38
25
24
37
VSX-74TXVi and
VSX-74TXVi-S
only
VSX-74TXVi and
VSX-74TXVi-S
only
33
21
15
52
26
32
11

VSX-74TXVi 13
5678
5678
C
D
F
A
B
E
(1) CHASSIS SECTION PARTS LIST
(2) CONTRAST TABLE
VSX-74TXVi/KUXJ/CA, VSX-74TXVi-S/KUXJC, VSX-72TXV/KUXJ/CA and VSX-72TXV-S/KUXJC are constructed
the same except for the following:
Mark No. Description Part No.
NSP 1 BRIDGE 1 Assy AWX8667
2 1394 Assy See Contrast table (2)
3 TRANS 2-2 Assy AWX8626
4 PRIMARY Assy AWX8628
5 DIGITAL MOTHER Assy See Contrast table (2)
6 HDMI & DVC Assy AWQ7024
7 SP/PS Assy See Contrast table (2)
8 TRANS 2-1 Assy AWX8646
NSP 9 DIODE Assy AWX8648
10 VH TR Assy AWX8649
11 DC/DC Assy AWX8650
12 INTERFACE Assy AWX8651
NSP 13 TRANS SIDE Assy AWX8652
14 LOCAL SUPPLY Assy AWX8671
15 DSP Assy AWX8599
16 TRANS 1 Assy • • • • •
NSP 17 FFC Guard (Front) Assy AWX8634
NSP 18 FFC Guard (Side) Assy AWX8696
> 19 Power Transformer (T1501) ATS7402
> 20 Fuse (FU4 : 5A/125V) REK1067
> 21 Fuse (FU1 : 10A/125V) REK1087
> 22 Fuse (FU5, 6 : 1.25A/125V) REK1108
> 23 Fuse (FU7, 8 : 2.5A/125V) REK1112
24 22P Flexible Cable (J52) See Contrast table (2)
25 10P Flexible Cable (J53) See Contrast table (2)
NSP 26 Under Base 72 ANA7182
27 Under Beam V1 ANG7478
NSP 28 Trans. Frame 74 ANG7539
NSP 29 DSP Shield 74 ANG7540
NSP 30 Panel Stay 74 ANG7541
NSP 31 Transistor Holder ANG7543
NSP 32 DC Assy Holder ANG7544
NSP 33 HDMI Shield ANK7124
34 PCB Mold AMR2534
35 Inter Holder A AMR7500
36 Inter Holder B AMR7501
37 Shield Cushion See Contrast table (2)
38 Nyron Rivet See Contrast table (2)
39 Nyron Rivet AEC7408
40 Card Spacer AEC7502
NSP 41 FR IN Barrier AEC7538
42 Locking Card Spacer See Contrast table (2)
43 Locking Wire Saddle AEC7550
44 Side Clamp DEC2007
45 Card Spacer DNK2769
46 Locking Card Spacer PNW2917
47 • • • • •
48 • • • • •
49 • • • • •
50 • • • • •
51 Screw 3 x 15 ABA7100
NSP 52 Binder (BK-1) ZCA-BK1
Mark No. Description Part No.
Mark No. Symbol and Description VSX-74TXVi
/KUXJ/CA
VSX-74TXVi-S
/KUXJC
VSX-72TXV
/KUXJ/CA
VSX-72TXV-S
/KUXJC
2 1394 Assy AWK7882 AWK7882 Not used Not used
5 DIGITAL MOTHER Assy AWP7037 AWP7037 AWP7041 AWP7041
7 SP/PS Assy AWX8642 AWX8642 AWX8644 AWX8644
24 22P Flexible Cable (J52) ADD7517 ADD7517 Not used Not used
25 10P Flexible Cable (J53) ADD7518 ADD7518 Not used Not used
37 Shield Cushion AEB7372 AEB7372 Not used Not used
38 Nyron Rivet AEC7406 AEC7406 Not used Not used
42 Locking Card Spacer AEC7549 AEC7549 Not used Not used

VSX-74TXVi
14
1234
1234
C
D
F
A
B
E
2.4 REAR PANEL SECTION
A
B
B
A
CONTACT SIDE
NON-CONTACT
SIDE
K
J
I
B
F
H
A
AE
INTERFACE
CN4320
INTERFACE
CN4319
INTERFACE
CN4318
INTERFACE
CN4317
INTERFACE
CN4316
POWER AMP IN
CN5603 CN4315
CN4314
CN4324
INTERFACE
CN4313
CN4325
CN4312
16
23
21
15
17
26
14
18
12
9
19
5
27
3
2
6
10
13
22
20
11
7
1
8
4

VSX-74TXVi 15
5678
5678
C
D
F
A
B
E
(1) REAR PANEL SECTION PARTS LIST
(2) CONTRAST TABLE
VSX-74TXVi/KUXJ/CA, VSX-74TXVi-S/KUXJC, VSX-72TXV/KUXJ/CA and VSX-72TXV-S/KUXJC are constructed
the same except for the following:
Mark No. Description Part No.
NSP 1 BRIDGE 2 Assy AWX8668
2 COMPOSITE V Assy AWX8620
3SVIDEO Assy AWX8622
4 PREOUT & CONTROL Assy AWX8625
5 COMPONENT & VOL Assy See Contrast table (2)
6V-AUDIO Assy AWX8637
NSP 7 BRIDGE 3 Assy AWX8669
8AUDIO & MULTI CH IN Assy AWX8674
9 FM/AM TUNER Unit AXX7172
10 19P Flexible Cable (J45) ADD7511
11 17P Flexible Cable (J46) ADD7512
12 17P Flexible Cable (J47) ADD7513
13 26P Flexible Cable (J48) ADD7514
14 11P Flexible Cable (J54) ADD7519
15 Cord Stopper CM-22C
> 16 Power Cord VDG1075
17 Rear Panel See Contrast table (2)
18 FFC Cushion AEB7373
NSP 19 PCB Spacer (3 x 6) AEC7156
20 Nyron Rivet AEC7408
21 SP Sheet 74 AEC7537
NSP 22 Connect Barrier AEC7541
23 Cushion Circle 16B AED7052
24 • • • • •
25 • • • • •
26 Screw 2.85 x 7 ABA7078
27 Terminal Screw AKE-031
Mark No. Symbol and Description VSX-74TXVi
/KUXJ/CA
VSX-74TXVi-S
/KUXJC
VSX-72TXV
/KUXJ/CA
VSX-72TXV-S
/KUXJC
5 COMPONENT & VOL Assy AWQ7028 AWQ7028 AWQ7030 AWQ7030
17 Rear Panel 74KU ANC8324 Not used Not used Not used
17 Rear Panel 74SKU Not used ANC8366 Not used Not used
17 Rear Panel 72KU Not used Not used ANC8325 Not used
17 Rear Panel 72SKU Not used Not used Not used ANC8367

VSX-74TXVi
16
1234
1234
C
D
F
A
B
E
2.5 POWER AMP BLOCK
B
B
C
C
D
D
A
A
CONTACT SIDE
NON-CONTACT
SIDE
Q
O
R
P
COMPONENT & VOL
CN2601
TRANS 2-1
CN4202
DIGITAL MOTHER
CN103
LOCAL SUPPLY
J6104
TRANS SIDE
CN4403
6
4
10
8
2
8
8
12
13
13
15
15
9
5
3
11
7
12
12
12
9
1
8
10
8
8

VSX-74TXVi 17
5678
5678
C
D
F
A
B
E
POWER AMP BLOCK PARTS LIST
Mark No. Description Part No.
1POWER AMP-L Assy AWX8654
2POWER AMP-R Assy AWX8656
3POWER PROTECT Assy AWX8658
4POWER AMP IN Assy AWX8662
5 19P Flexible Cable (J43) ADD7509
6 19P Flexible Cable (J44) ADD7510
7 17P Flexible Cable (J51) ADD7516
8 PCB Angle 45 ANG7406
NSP 9 HS Angle 74 ANG7542
NSP 10 Heatsink 74 ANH7181
11 Nyron Rivet AEC7408
12 Mica Sheet AEC7545
NSP 13 Binder (BK-1) ZCA-BK1
14 • • • • •
15 Screw 3 x 19 ABA7085

VSX-74TXVi
18
1234
1234
C
D
F
A
B
E
2.6 FRONT PANEL SECTION
A
A
CONTACT SIDE
NON-CONTACT
SIDE
C
D
TRANS SIDE
4401
DIGITAL MOTHER
CN101
LOCAL SUPPLY
CN6103
INTERFACE
CN4301
AB
AC
AD
15
13
21
18
28
41
3
9
7
5
2
6
8
31
31
24
26
17
23
10
12
14
23
32
20
17
25
32
22
22
16
16
27
19
10

VSX-74TXVi 19
5678
5678
C
D
F
A
B
E
(1) FRONT PANEL SECTION PARTS LIST
(2) CONTRAST TABLE
VSX-74TXVi/KUXJ/CA, VSX-74TXVi-S/KUXJC, VSX-72TXV/KUXJ/CA and VSX-72TXV-S/KUXJC are constructed
the same except for the following:
Mark No. Description Part No.
1 DISPLAY Assy See Contrast table (2)
2FRONT-IN Assy AWX8638
3 HEADPHONE Assy AWX8639
4 INPUT SELECT Assy AWX8640
5VOLUME Assy AWX8641
6 15P Flexible Cable (J41) ADD7507
7 23P Flexible Cable (J42) ADD7508
NSP 8 Cord with Plug ADH7022
9 Door Spring ABK7061
10 Cushion Circle See Contrast table (2)
11 Cushion 11 x 7 AED7092
12 Door Shaft 35 AMR7295
13 Door Base See Contrast table (2)
14 Door Panel See Contrast table (2)
15 Damper Assy (200) AXA7088
16 Rotary Knob See Contrast table (2)
17 Hinge Button See Contrast table (2)
18 ENTER Button See Contrast table (2)
19 Door Sheet See Contrast table (2)
20 Window See Contrast table (2)
21 Filter See Contrast table (2)
22 Ring ABH7213
23 Knob Spacer V1 AEC7519
24 Panel Base See Contrast table (2)
25 Front Panel See Contrast table (2)
26 Earth Plate A ANG7484
27 Name Plate See Contrast table (2)
28 STBY BTN Assy See Contrast table (2)
29 • • • • •
30 • • • • •
31 Screw ABA7110
32 Nut NK90FCU
Mark No. Description Part No.
Mark No. Symbol and Description VSX-74TXVi
/KUXJ/CA
VSX-74TXVi-S
/KUXJC
VSX-72TXV
/KUXJ/CA
VSX-72TXV-S
/KUXJC
1 DISPLAY Assy AWX8635 AWX8635 AWX8636 AWX8636
10 Cushion Circle 6B AED7083 Not used AED7083 Not used
10 Cushion Circle 6S Not used AED7080 Not used AED7080
13 Door Base BK AMR7508 Not used AMR7508 Not used
13 Door Base S Not used AMR7510 Not used AMR7510
14 Door Panel 74 ANB7369 Not used ANB7369 Not used
14 Door Panel 74S Not used ANB7391 Not used ANB7391
16 Rotary Knob BK AAA7031 Not used AAA7031 Not used
16 Rotary Knob S Not used AAA7025 Not used AAA7025
17 Hinge Button 74BK AAD7744 Not used AAD7744 Not used
17 Hinge Button AX4S Not used AAD7746 Not used AAD7746
18 ENTER Button 74BK AAD7747 Not used AAD7747 Not used
18 ENTER Button AX4S Not used AAD7749 Not used AAD7749
19 Door Sheet 74 AAK8291 Not used AAK8291 Not used
19 Door Sheet AX4HY Not used AAK8293 Not used AAK8293
20 Window 74 AAK8296 Not used Not used Not used
20 Window 74S Not used AAK8317 Not used Not used
20 Window 72 Not used Not used AAK8297 Not used
20 Window 72S Not used Not used Not used AAK8318
21 Filter 74 AAK8308 Not used AAK8308 Not used
21 Filter 74S Not used AAK8311 Not used AAK8311
24 Panel Base 74BK AMB7900 Not used AMB7900 Not used
24 Panel Base 74S Not used AMB7907 Not used AMB7907
25 Front Panel 74 ANB7374 Not used Not used Not used
25 Front Panel 74S Not used ANB7392 Not used Not used
25 Front Panel 72 Not used Not used ANB7375 Not used
25 Front Panel 72S Not used Not used Not used ANB7393
27 Name Plate B PAN1376 Not used PAN1376 Not used
27 Name Plate Not used VAM1124 Not used VAM1124
28 STBY BTN 915K Assy XAD3216 Not used XAD3216 Not used
28 STBY BTN 915P Assy Not used XAD3217 Not used XAD3217

VSX-74TXVi
20
1234
1234
C
D
F
A
B
E
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM
3.1 BLOCK DIAGRAM
3.1.1 OVERALL BLOCK DIAGRAM
DIR & DIT
96k/24bit
IC301
SELECTOR
IC304,IC305
INPUT SELECTOR
A/D
96k/24bit
IC482
ATT
IC481
PHONO
CD
CDR
DVD
TV
SAT
VIDEO1
DVR1
CDR REC
DVR1,2 REC
FL/FR
C/SW
SL/SR
SBL/SBR
MIC
FRONT IN(OPT)
DIGITAL IN(COAX1)
DIGITAL IN(COAX2)
DIGITAL IN(OPT2)
DIGITAL IN(OPT3)
DIGITAL IN(OPT4)
1394
PHY LINK
IC201
Rate
Controller
IC301
DSD-LPCM
Converter
IC401
i.LINK(S400)
i.LINK(S400)
DVD-A
S/PDIF
USB-S/PDIF
IC261
USB
DIGITAL IN(OPT1)
HDMI
RECEIVER
TRANSMITTER
IC101/IC301
HDMI OUT
HDMI IN 2
HDMI IN 1
CN101
CN102
CN301
JA201
JA202
JA261
JA301
JA305
JA304
JA303
JA302
JA307
JA306
VSX-74TXVi ONLY
CN6205
JA6301
CN6207 (1/2)
XMDT
IC281
IC6203
XM radio
DVD-A
S/PDIF
SELECTOR
IC306-IC309
IC2631
IC2636
SELECTOR
IC402,IC403,IC405
DVR2
iPod
CENTER
D/A
&
LPF
IC951,IC952
(VSX-74TXVi ONLY)
DIGITALOUT1(OPT)
DIGITALOUT2(OPT)
DSP1
DECODER
PORT
PROCESSING
Floating 32bit
IC101
CN6307
CN6308(1/2)
CN6309(1/2)
CN2804
CN6207(2/2)
CN6208
CN6209
JA3451
CN6308(2/2),
CN6309(2/2)
L
L
L
LL
K
L
IC6201
AIC6301
B
A
IC3451
C
IC2932
L
M
L
AG
AF AF
AF
AF
AE
IC309 :VSX-74TXVi ONLY
VSX-74TXVi ONLY
16 15
VSX-72TXV ONLY