Pioneer VSXC-301 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 2003
STANDBY/ON
FRONT INPUT
DIGITAL INPHONES
VIDEO AUDIO RL
DTS
2
PRO LOGIC
2
DIGITAL
VSX-C301-S
II
PHONESADVANCEDSTEREOAUTO
MASTER
SOUND MODE
INPUT SELECTOR
VOLUME
DOWN UP
AUDIO/VIDEO MULTI-CHANNEL RECEIVER
VSX-C301-S
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
Model Type Power Requirement Remarks
VSX-C301-S KUCXU AC120V
ORDER NO.
RRV2753
For details, refer to "Important symbols for good services".
T-ZZK MAY 2003 printed in Japan
1234
SAFETY INFORMATION
A
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
B
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)
C
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.
(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
D
E
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.
Reading should
not be above
0.5 mA
Earth
ground
Device
under
test
Also test with
plug reversed
(Using AC adapter
plug as required)
Test all
exposed metal
surfaces
Leakage
current
tester
AC Leakage Test
ANY MEASUREMENTS NOT WITHIN THE
LIMITS OUTLINED ABOVE ARE INDICATIVE
OF A POTENTIAL SHOCK HAZARD AND
MUST BE CORRECTED BEFORE RETURNING THE APPLIANCE TO THE CUSTOMER.
2. PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in the appliance
have special safety related characteristics. These are
often not evident from visual inspection nor the
protection afforded by them necessarily can be obtained
by using replacement components rated for voltage,
wattage, etc. Replacement parts which have these
special safety characteristics are identified in this
Service Manual.
Electrical components having such features are
identified by marking with a
on the 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.
on the schematics and
F
2
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VSX-C301-S
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[ Important symbols for good services ]
In this manual, the symbols shown-below indicate that adjustments, settings or cleaning should be made securely.
When you find the procedures bearing any of the symbols, be sure to fulfill them:
1. Product safety
You should conform to the regulations governing the product (safety, radio and noise, and other regulations), and
should keep the safety during servicing by following the safety instructions described in this manual.
2. Adjustments
To keep the original performances of the product, optimum adjustments or specification confirmation is indispensable.
In accordance with the procedures or instructions described in this manual, adjustments should be performed.
3. Cleaning
For optical pickups, tape-deck heads, lenses and mirrors used in projection monitors, and other parts requiring cleaning,
proper cleaning should be performed to restore their performances.
4. Shipping mode and shipping screws
To protect the product from damages or failures that may be caused during transit, the shipping mode should be set or
the shipping screws should be installed before shipping out in accordance with this manual, if necessary.
A
B
5. Lubricants, glues, and replacement parts
Appropriately applying grease or glue can maintain the product performances. But improper lubrication or applying
glue may lead to failures or troubles in the product. By following the instructions in this manual, be sure to apply the
prescribed grease or glue to proper portions by the appropriate amount.For replacement parts or tools, the prescribed
ones should be used.
C
D
56
VSX-C301-S
E
F
7
8
3
CONTENTS
SAFETY INFORMATION ..................................................................................................................................... 2
A
B
C
D
E
1. SPECIFICATIONS ............................................................................................................................................5
2. EXPLODED VIEWS AND PARTS LIST ............................................................................................................ 6
2.1 PACKING ................................................................................................................................................... 6
2.2 EXTERIOR SECTION................................................................................................................................ 8
2.3 INTERIOR SECTION............................................................................................................................... 10
2.4 FRONT PANEL SECTION ....................................................................................................................... 12
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM..........................................................................................14
3.1 BLOCK DIAGRAM ................................................................................................................................... 14
3.1.1 AUDIO AND VIDEO BLOCK ................................................................................................................. 14
3.1.2 POWER SUPPLY BLOCKS ..................................................................................................................16
3.2 OVERALL WIRING DIAGRAM................................................................................................................. 18
3.3 FM/AM TUNER MODULE........................................................................................................................ 20
3.4 VIDEO ASSY ........................................................................................................................................... 22
3.5 AUDIO INPUT ASSY ...............................................................................................................................24
3.6 MOTHER ASSY (1/5)............................................................................................................................... 26
3.7 MOTHER ASSY (2/5) and DSP KAWA ASSY .........................................................................................28
3.8 MOTHER ASSY (3/5)............................................................................................................................... 30
3.9 MOTHER ASSY (4/5)............................................................................................................................... 32
3.10 MOTHER ASSY (5/5)............................................................................................................................. 34
3.11 DSP ASSY (1/2)..................................................................................................................................... 36
3.12 DSP ASSY (2/2)..................................................................................................................................... 38
3.13 FRONT IN and AMP KAWA ASSYS ...................................................................................................... 40
3.14 6CH AMP ASSY .................................................................................................................................... 42
3.15 AMP OUT ASSY .................................................................................................................................... 44
3.16 ENCODER, FRONT and POWER SW ASSYS .....................................................................................46
3.17 PRIMARY, D5V, 12V and VHVL ASSYS ................................................................................................ 48
4. PCB CONNECTION DIAGRAM ..................................................................................................................... 50
4.1 FM/AM TUNER MODULE........................................................................................................................ 51
4.2 AUDIO INPUT and 12V ASSYS............................................................................................................... 52
4.3 MOTHER, DSP KAWA and D5V ASSYS................................................................................................. 54
4.4 DSP ASSY ............................................................................................................................................... 58
4.5 FRONT IN ASSY...................................................................................................................................... 60
4.6 AMP KAWA ASSY ................................................................................................................................... 61
4.7 6CH AMP ASSY ...................................................................................................................................... 62
4.8 AMP OUT ASSY ...................................................................................................................................... 64
4.9 ENCODER, FRONT and POWER SW ASSYS ....................................................................................... 66
4.10 PRIMARY ASSY .................................................................................................................................... 70
4.11 VHVL ASSY ........................................................................................................................................... 71
4.12 VIDEO ASSYS ....................................................................................................................................... 72
5. PCB PARTS LIST ...........................................................................................................................................73
6. ADJUSTMENT ............................................................................................................................................... 79
6.1 TUNER SECTION ....................................................................................................................................79
7. GENERAL INFORMATION............................................................................................................................. 80
7.1 DIAGNOSIS ............................................................................................................................................. 80
7.1.1 Test Mode.............................................................................................................................................. 80
7.1.2 Protection Circuit................................................................................................................................... 81
7.1.3 Specifications of Speaker Detection .....................................................................................................82
7.1.4 Circuit Description................................................................................................................................. 83
7.1.5 Troubleshooting .....................................................................................................................................84
7.1.6 Timing Chart.......................................................................................................................................... 86
7.2 PARTS...................................................................................................................................................... 90
7.2.1 IC .......................................................................................................................................................... 90
7.2.2 DISPLAY ............................................................................................................................................... 96
7.3 CLEANING............................................................................................................................................... 97
8. PANEL FACILITIES ........................................................................................................................................ 98
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1. SPECIFICATIONS
Amplifier section
Continuous average power output of 28 watts* per
channel, min., at 6 ohms, from 20 Hz to 20,000 Hz with
no more than 0.9 %** total harmonic distortion (front).
Continuous Power Output (
STEREO mode)
Front. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 W + 28 W
(FTC 20–20 kHz, THD 0.9 %, 6 Ω)
RMS Power Output
Front. . . . . . . . . . . . 75 W/ch (DIN 1 kHz, THD 10 %, 6 Ω)
Center . . . . . . . . . . . . .75 W (DIN 1 kHz, THD 10 %, 6 Ω)
Surround. . . . . . . . .75 W/ch (DIN 1 kHz, THD 10 %, 6 Ω)
Audio section
Input (Sensitivity/Impedance) . . . . . . . . . . 200 mV/47 kΩ
Output (Level/Impedance)
DVR/VCR. . . . . . . . . . . . . . . . . . . . . . . . . 200 mV/2.2 kΩ
* Measured pursuant to the Federal Trade Commission’s Trade
Regulation rule on Power Output Claims for Amplifiers.
** Measured by Audio Spectrum Analyzer.
Video section
Input (Sensitivity/Impedance) . . . . . . . . . . . . 1 Vp-p/75 Ω
Output (Level/Impedance). . . . . . . . . . . . . . . 1 Vp-p/75 Ω
Manufactured under license from Dolby Laboratories.
"Dolby", "Pro Logic", and the double-D symbol are
trademarks of Dolby Laboratories.
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: 76.0 dB (at 85 dBf)
Stereo: 72.0 dB (at 85 dBf)
Distortion . . . . . . . . . . . . . . . . . . . . . .Stereo: 0.6 % (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 (DIN) . . . . . . . . . . . . . . . . .75 Ω unbalanced
AM tuner section
Frequency Range. . . . .530 kHz to 1,700 kHz (10kHz step)
Sensitivity (IHF, Loop antenna). . . . . . . . . . . . . . 350 µV/m
Selectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 dB
Signal-to-Noise Ratio. . . . . . . . . . . . . . . . . . . . . . . . .50 dB
Antenna. . . . . . . . . . . . . . . . . . . . . . . . . . . . .Loop antenna
Miscellaneous
Power Requirements. . . . . . . . . . . . . . . .AC 120 V, 60 Hz
Power Consumption . . . . . . . . . . . . . . . . . . . . . . . . 130 W
In standby. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 W
Dimensions. . . . 16 9/16(W) x 2 13/16(H) x 15 1/8 (D) in.
Weight (without package) . . . . . . . . . . . . . . . . .14 lb 6 oz
Furnished parts
AM loop antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
FM wire antenna. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Dry cell batteries (AA size IEC R6P) . . . . . . . . . . . . . . . 2
Remote control unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Power cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Coaxial cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Speaker cable labels . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Operating instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Warranty card. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Note
• Specifications and the design are subject to possible
modifications without notice, due to improvements.
A
B
C
D
"DTS" and "DTS Digital Surround" are trademarks of
Digital Theater Systems, Inc.
Accessories
• Power Cable
(ADG7021)
FM wire antenna
(ADH7004)
AM loop antenna
(ATB7009)
Coaxial cable
(ADE7087)
56
Speaker cable labels
(ARW7163)
FRONT
L
FRONT
L
FRONT
R
FRONT
R
CENTER
CENTER
SURROUND
SURROUND
SURROUND
SURROUND
VSX-C301-S
• Remote Control Unit
(AXD7350)
E
C
R
U
O
S
RECEIVER
RECEIVER
DVR/TV
TEST TONECH SELECT
ADVANCED
STB
FRONT FM/AM
LEVEL
DVD
VIDEO
INPUT
SLEEP
AV DIRECT
SURROUND
SURROUND
STEREO
AUTO
MENU
T.EDITDTV MENU
SELECT
SIGNAL
STST
SETUP
SYSTEM
DIALOG
ENTER
TUNE
VOLUME
MASTER
MODE
SOUND
ROOM
SETUP
MUTE
TOP MENU
GUIDE
SEARCH
SUBTITLE
TUNE
AUDIO
VIRTUAL SB DIMMER
RF ATT
A
BANDEON RETURN
D.ACCESSDISPLAY
CLASS MPX
BC DE
10
DISC
ENTER
VOLUME
CHANNEL
TV CONTROL
RECEIVER
INPUT
CHANNEL
E
• Dry Cell Battery (R6P, AA)
(VEM1030)
L
L
R
R
7
8
F
5
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2. EXPLODED VIEWS AND PARTS LIST
NOTES:
A
2.1 PACKING
B
C
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.)
1
2
3
4
5
20
9
14
11
17
D
15
E
19
13
12
18
16
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VSX-C301-S
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PACKING parts List
Mark
No. Description Part No.
1 FM Wire Antenna ADH7004
2 AM Loop Antenna ATB7009
3 Power Cable ADG7021
4 Speaker Cable Label ARW7163
5 Operating instructions 301 ARE7328
(English)
6• • • • • •
7• • • • • •
8• • • • • •
NSP 9 Polyethylene Bag Z21-038
(0.03*230*340)
10 • • • • • •
11 Remote Control Unit AXD7350
12 Battery Cover AZA7424
NSP 13 Dry cell batteries (R6P,AA) VEM1030
NSP 14 Warranty Card ARY7045
15 Left Pad 301 AHA7407
A
B
16 Right Pad 301 AHA7408
17 Spacer AHB7088
18 Packing Sheet AHG7015
19 Packing Case AHD8158
20 Coaxial Cable ADE7087
C
D
E
56
VSX-C301-S
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7
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2.2 EXTERIOR SECTION
A
6
7
18
17
10
18
12
23
A
NON-CONTACT
18
18
18
1
SIDE
19
18
CONTACT SIDE
18
8
18
18
5
17
B
Refer to
C
"2.3 INTERIOR SECTION".
25
26
B
28
20
20
29
D
E
F
20
27
Refer to
"2.4 FRONT PANEL SECTION".
20
A
22
I
20
20
A
18
3
2
20
16
O
20
22
4
16
2214
24
*Serial Number Label is put on
bottom of Under Base.
22
14
22
20
15
9
21
13
22
20
15
22
8
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VSX-C301-S
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EXTERIOR SECTION parts List
Mark
No. Description Part No.
1 FM/AM TUNER MODULE AXQ7245
2 6CH AMP Assy AWM7786
3 D5V Assy AWX8224
NSP 4 AMP MODULE 6CH AXQ7247
5 Bonnet Case AZN7934
6 Label ARW7217
7 License Label ARW7220
8 Fan Cover AMR7446
9 Rear Panel 301SKU ANC8157
10 Tuner Barrier AEC7383
11 • • • • • •
12 AC Inlet Assy VKP2126
13 DC Fan Motor AXM7025
14 Fan Plate ANG7462
15 FET Bracket A ANG7418
NSP 16 Heat Sink ANH7161
17 Screw BCZ40P060FNI
18 Screw BBZ30P080FZK
19 Screw PPZ30P100FZK
20 Screw BBZ30P060FMC
A
B
C
21 Screw BBZ30P300FZK
22 Screw BBZ30P140FMC
23 J1905 13P FFC/60V ADD7402
NSP 24 Label VRW1629
25 VIDEO Assy AWX8225
NSP 26 PCB Spacer AEC7156
NSP 27 Energy Star Label AAX7876
28 J1911 19P FFC/60V ADD7422
NSP 29 Binder ZCA-BK1
D
E
56
VSX-C301-S
F
7
8
9
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2.3 INTERIOR SECTION
A
B
B
22
H
32
31
I
31
4
F
E
5
L
H
B
31
31
P
3
12
M
23
I
M
F
D
D
28
C
1
31
N
31
31
17
N
31
16
F
31
7
E
13
14
31
18
A
31
C
6
33
19
D
31
24
31
L
34
31
33
N
A
32
C
D
31
NON-CONTACT
E
C
SIDE
8
J
H
CONTACT SIDE
9
31
31
25
10
Q
31
E
27
26
30
F
10
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VSX-C301-S
29
>
>
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INTERIOR SECTION parts List
Mark
No. Description Part No.
1 AUDIO-INPUT Assy AWX8227
2• • • • • •
3 12V Assy AWX8170
4 DSP Assy AWX8241
5 DSP KAWA Assy AWX8167
6 PRIMARY Assy AWX8190
7 MOTHER Assy AWX8197
8 AMP KAWA Assy AWX8223
9 AMP OUT Assy AWX8177
10 VHVL Assy AWX8259
11 • • • • • •
12 J1911 19P FFC/60V ADD7422
13 J1906 10P FFC/60V ADD7405
14 J1909 19P FFC/60V ADD7422
15 • • • • • •
16 J1901 17P FFC/60V ADD7398
17 J1904 17P FFC/60V ADD7401
18 FU1 Fuse (6.3A) REK1069
19 T1 Power Transformer ATS7347
20 • • • • • •
A
B
C
21 • • • • • •
22 Core Stay A ANG7447
23 Core Stay B ANG7448
24 Jack Stay ANG7450
25 Trans Frame ANG7446
NSP 26 Under Base ANA7151
27 PCB Support AEC7365
28 PCB Mold AMR2533
NSP 29 PC Support VEC1749
30 Foot REC-434
31 Screw BBZ30P060FMC
32 Screw BCZ40P060FNI
33 Screw BBZ30P180FMC
NSP 34 Fuse Card AAX2374
D
E
56
VSX-C301-S
F
7
8
11
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2.4 FRONT PANEL SECTION
A
22
19
B
8
C
7
11
G
1
10
5
14
M
15
22
2
18
12
17
22
22
22
L
21
6
20
3
22
22
16
22
K
4
12
11
10
NON-CONTACT
SIDE
CONTACT SIDE
D
E
13
F
12
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FRONT PANEL SECTION parts List
Mark
No. Description Part No.
1 FRONT IN Assy AWX8219
2 POWER SW Assy AWX8174
3 FRONT Assy AWX8199
4 ENCODER Assy AWX8175
5 Front Panel Assy AXG7186
6 Front Panel AMB7839
NSP 7 Power Button AAD7696
8 PIONEER Name Plate VAM1129
9• • • • • •
10 Insulator Ring AAK8091
11 Rubber Foot VEB1325
12 VOL Ring ABH7220
13 Volume Knob AAB7252
14 Select Knob AAB7254
15 LED Lens 301 AAK8084
16 J1903 9P FFC/60V ADD7400
17 J1902 15P FFC/60V ADD7399
18 J1911 19P FFC/60V ADD7422
19 Jack Cover AMR7447
20 Front Frame ANG7445
A
B
C
NSP 21 Display Window 301 AAK8083
22 Screw PPZ30P080FMC
D
E
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3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM
3.1 BLOCK DIAGRAM
3.1.1 AUDIO AND VIDEO BLOCK
A
B
C
FRONT L
DIGITAL
IN
G
AUDIO INPUT
L CH
DVD
TV/SAT
VIDEO
DVR/VCR
DVR OUT
DIGITAL
AUDIO INPUT
DVD
OPT 1
TV/SAT
OPT 2
DVR/VCR
(19P)
CN4102
FRONT IN
ASSY(1/2)
7
8 9
2 5
3
4
10 12
11
IC701 NJU7312AM
SELECTOR
IC901 TC7WU04F
AUDIO INPUT ASSY
C
17
8
FRONT L
F. OPT
CN1204
(19P)
3
12
FRONT L
2
3
IC702 (1/2)
UPC4570G2
FM/AM TUNER
A
MODULE
CN801(13P)
CN1262
(19P)
3
8
CN701
(19P)
3
8
1
CN901
(19P)
INPUT L
19
COAX
11
OPT1
7
OPT2
9
CN1263
19
11
7
9
(19P)
7
IC1261 (1/2)
NJM2100M
3
1
2
MOTHER ASSY
D
LOW PASS FILTER
IC1101 (1/2)
NJM4558MD
3
1
2
IC1105 (1/2)
NJM4558MD
2
1
3
IC1102 (1/2)
NJM4558MD
3
1
2
IC1103 (1/2)
NJM4558MD
3
1
2
IC1103 (2/2)
NJM4558MD
5
7
6
D
E
F
VIDEO INPUT
DVD
TV/BS
DVR/VTR
VIDEO
CONTROL
INPUT
OUTPUT
IC2501 NJM2296M
FUNCTION SELECTOR
VIDEO ASSY
B
CN9001
(19P)
12 4 10 7
SR IN/OUT
OPT2
OPT1
CN1264
(10P)
COAX
23 11 8
F.OPT
1 13 16 20 22 21
CN1811
(13P)
3 3 7 11 15 13
CN1265
4 2 3
LIN
FLO
SLO
(23P)
CO
SWO
CN1801
(23P)
CN1813
(15P)
E
DSP KAWA
ASSY
4 10 7
CN8017
(10P)
5 1 3 7
IC8401
AK4114VQ
DIR & DIT
DSP ASSY
F
VIN1
13
VOUT3
11
VIN3
7
VIN2
9
VOUT1
VIN4
5
1
CN2501
(19P)
OUTPUT
DVR/VTR
SR IN/OUT
8
VIDEO
(to TV)
CN8003
IC8501 DSPD56367PV150(AX6)
3 3 7 11 15 13
(13P)
31
28 9
DSP for DECODE
IC8401 AK4529VQ
27 25 23 24
8 ch CODEC
CN8009
(15P)
14
1234
VSX-C301-S
5678
A
AMP KAWA ASSY
H
IC1221 BD3814FV
6 CH E.VOL
FL
FL
19
13
15
9
27
IN
OUT
SL
SL
30
IN
OUT
C
C
29
IN
OUT
SW
SW
32
IN
OUT
IC9001 PD5863A
MAIN MICROCOMPUTER
Remote
Sensor
Unit
ANDREW PREAMP
IC1305
7
7
7
1
CN9006
(15P)
CN4203
(15P)
NJU7311AM
29
28
2
3
23
22
8
9
L
22
IC1301 (1/2)
NJM4558MD
5
6
IC1302 (2/2)
NJM4558MD
5
6
IC1303 (1/2)
NJM4558MD
5
6
IC1303 (2/2)
NJM4558MD
3
2
1
SR IN/OUT
1
17
IC4201 PE5368B
FL CONTROL
MICROCOMPUTER
IC1501 (2/2)
27
4
21
10
UPC4570G2
IC1502 (1/2)
UPC4570G2
IC1503 (2/2)
UPC4570G2
IC1503 (1/2)
UPC4570G2
CN1501
5
6
5
6
5
6
3
2
7
7
7
CN9010
1
CN1204
(17P)
(17P)
(19P)
FRONT ASSY
4202
(3P)
CN4701
FL OUT
12
SL OUT
5
C OUT
7
SW OUT
17
HP L
1
HP L
10110
P-ON
(17P)
6
13
11
CN4102
(19P)
FRONT IN
G
ASSY(2/2)
STANDBY/ON
1
4501
(3P)
CN4706
(23P)
9
4
6
PHONES
S4501
6CH AMP
I
ASSY
IC3301
STK402-270
CN3002
(23P)
FL
15
SL
20
C
18
1
POWER
16
1
POWER
IC3401
STK402-270
CN3001
(23P)
6
7
AMP
18
19
6
7
AMP
CN203
FL OUT
C OUT
SL OUT
SW OUT
(19P)
17
16
14
13
10
9
1
HP L
17
CN301
(17P)
AMP OUT ASSY
J
7
8
14
15
22
23
RY301
RY303
RY304
RY304
FL OUT
C OUT
SL OUT
CN4705
(23P)
17
16
10
9
2
1
CN4703
(19P)
3
4
6
7
10
11
5 CH
SP OUT
FL
C
SL
SW
FL OUT
C OUT
SL OUT
B
C
D
V4301
FL DISPLAY
POWER SW ASSY
4206
(5P)
4401
(5P)
S4401,
S4402
ENCODER ASSY
K
M
VSX-C301-S
56
E
F
7
8
15
1234
3.1.2 POWER SUPPLY BLOCKS
A
POWER LINE
N
PRIMARY ASSY
B
D
MOTHER ASSY
B
P
12V ASSY
AUDIO
INPUT
ASSY
D622-D625
Q
C
VHVL ASSY
I
6CH AMP
ASSY
D
DSP ASSY
F
E
D
MOTHER ASSY
F
16
1234
VSX-C301-S
5678
A
B
C
D
E
56
VSX-C301-S
F
7
8
17
1234
3.2 OVERALL WIRING DIAGRAM
A
VIDEO ASSY
B
(AWX8225)
B
AC POWER CORD
ADG7021
AC INLET ASSY
VKP2126
C
AUDIO INPUT ASSY
(AWX8227)
12V ASSY
P
(AWX8170)
N
C
D
J4601
ADX7442
E
G
FRONT IN ASSY
(AWX8219)
PRIMARY ASSY
(AWX8190)
D
MOTHER ASSY
(AWX8197)
F
DSP ASSY (AWX8241)
D 1/5- D 5/5
CN8003CN8009
F 1/2- F 2/2
CN8012
M
POWER
SW ASSY
F
18
(AWX8174)
VSX-C301-S
1234
FRONT ASSY
L
(AWX8199)
5678
Note : When ordering service parts, be sure to refer to "EXPLODED VIEWS and PARTS LIST" or "PCB PARTS LIST".
A
FM/AM
TUNER
MODULE
ASSY
AMP OUT ASSY
J
(AWX8177)
H
AMP KAWA ASSY
(AWX8223)
DC FAN MOTOR
AXM7025
(AXQ7245)
I
6CH AMP ASSY
(AWM7786)
A
B
C
E
DSP KAWA
ASSY
(AWX8167)
D5V ASSY
O
(AWX8224)
Q
VHVL ASSY
(AWX8259)
D
E
K
ENCODER ASSY
(AWX8175)
56
VSX-C301-S
F
7
8
19
1234
3.3 FM/AM TUNER MODULE
A
FM/AM TUNER MODULE (AXQ7245)
B
A
FM FRONT END
C
(FM) (FM)
D
(FM)
(AM)
E
(AM)
(FM)
MW RF TUNING BLOCK
(AM)
(FM)
(AM) (AM)
OSC : 981 - 2052kHz 9k step
(FM)
(FM)
(FM)
(FM) (FM)
(AM)
F
A
20
1234
VSX-C301-S
ATF7026
5678
A
: The power supply is shown with the marked box.
(TX)
: AUDIO SIGNAL ROUTE (TUNER)
(AM)
: AM SIGNAL ROUTE
(FM)
: FM SIGNAL ROUTE
B
(FM)
(AM)
(AM)
(AM)
(AM)
AM/FM IF+MPX IC
(FM)
(AM)
(AM)
(AM)
(FM)
(AM)
L201
ATE7003
(AM)
(TX)
(FM)
(TX)
(TX)
(TX)
(TX)
C
CN801
D 1/5
D
PLL IC
56
VSX-C301-S
E
F
A
7
8
21
1234
3.4 VIDEO ASSY
A
VIDEO BLOCK
IC2501 NJM2296M
B
C
VIDEO ASSY (AWX8225)
B
CN9001
D 1/5
D
REAR PANEL
E
: VIDEO SIGNAL ROUTE
F
: The power supply is shown with the marked box.
B B
22
1234
VSX-C301-S
5 678
A
B
C
D
E
56
VSX-C301-S
F
7
8
23
1234
3.5 AUDIO INPUT ASSY
A
B
C
(A)
(A)(A)
(A)
(A)
(A)
AUDIO INPUT ASSY
C
(AWX8227)
D
(A)
(D)
E
(D)
(D)
(D)
(D)
(A)
F
CN1263
D 2/5
24
C
VSX-C301-S
1234
5678
A
(A)
(A)
(A)
B
CN1262
D 2/5
C
(A)(A)
CAUTION : FOR CONTINUED PROTECTION
AGAINST RISK OF FIRE.
REPLACE ONLY WITH SAME TYPE
NO. 49102.5 FOR IC820 AND IC821
MFD, BY LITTELFUSE INC.
P
601
From
T1 PT
(A)
: AUDIO SIGNAL ROUTE (ANALOG)
(D)
: AUDIO SIGNAL ROUTE (DIGITAL)
: The power supply is shown with the marked box.
D
E
F
56
VSX-C301-S
C
7
8
25
1234
3.6 MOTHER ASSY (1/5)
A
B
CN201
A
D 2/5
C
CN2501
B
D
D 2/5
E
F
D 1/5
26
: The power supply is shown with the marked box.
VSX-C301-S
1234
N
CN551
5678
CN4203
L
A
DC DETECT: 3-4V
OVERLOAD DETECT: 2-3V
Short-circuit Fan and Power
supply circuit: less than 2V
(VH/VL)
D 1/5
MOTHER ASSY (AWX8197)
B
C
D 3/5
D 2/5
D 2/5
D
E
56
VSX-C301-S
F 2/2
7
CN8012
F
D 1/5
27
8
1234
3.7 MOTHER ASSY (2/5) and DSP KAWA ASSY
A
D 4/5
D 1/5
(A)(A)
(A)(A)
D 1/5
NORMAL : 0V
OVERLOAD : 5V
(A)
CN4102
B
C
G
INPUT ATT
IATT
ON : +12V
OFF : -12V
(A)
A/D OVERLOAD
DETECT
CN701
C
(A)(A)
(A)
D
(A)
(A)
(D)
CN901
C
(A)
E
(A)
(A)
(A)
E
DSP KAWA ASSY
(AWX8167)
(A)
F
D 2/5
28
(D)
F 1/2
E
1234
CN8017
F 1/2
CN8003
VSX-C301-S
(A)
(A)
F 1/2
CN8009
5678
D 2/5
MOTHER ASSY (AWX8197)
LOW PASS FILTER
(A)
(A)
: AUDIO SIGNAL ROUTE (ANALOG)
(D)
: AUDIO SIGNAL ROUTE (DIGITAL)
(A)
A
B
C
(A)
(A)
(A)
(A)
For SP CONFIG.
MIX AMP
(A)
D 3/5
D
E
: The power supply is shown with the marked box.
VSX-C301-S
56
F
D 2/5
7
8
29
1234
3.8 MOTHER ASSY (3/5)
A
D 3/5
B
MOTHER ASSY (AWX8197)
D 1/5
D 2/5
(A)
(A)
C
(A)
(A)
D
E
F
D 3/5
30
1234
VSX-C301-S
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