Pioneer VSXC-301 Service manual

STANDBY/ON		2DIGITAL	DTS	AUTO	STEREO 2PRO LOGICII ADVANCED PHONES SOUND MODE	MASTER
						INPUT SELECTOR VOLUME
	FRONT INPUT
	VIDEO	L AUDIO R
PHONES	DIGITAL IN

DOWN

UP

VSX-C301-S

ORDER NO.

RRV2753

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

For details, refer to "Important symbols for good services".

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

T-ZZK MAY 2003 printed in Japan

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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

BThis 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 ser vice technician.

LEAKAGE CURRENT CHECK

Measure leakage current to a known earth ground (water pipe, conduit, etc.) by connecting a leakage

Dcurrent 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
		Leakage	not be above
			0.5 mA
		current
E	Device	tester
	under
	test
	Test all
	exposed metal
	surfaces
	Also test with
	plug reversed
	(Using AC adapter		Earth
	plug as required)		ground

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 par ts 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.

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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

A

B

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.

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

E

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		VSX	-C301	-S	7	3
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1 2 3 4

CONTENTS

		SAFETY INFORMATION.....................................................................................................................................	2
	A	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
	B	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
	C	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
	D	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
	E	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.

"DTS" and "DTS Digital Surround" are trademarks of Digital Theater Systems, Inc.

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8

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

Accessories

• Power Cable

(ADG7021)

FM wire antenna (ADH7004)

AM loop antenna

(ATB7009) Speaker cable labels (ARW7163)

Coaxial cable (ADE7087)

•

Remote Control Unit

E

(AXD7350)

ROOM SYSTEM SETUP SETUP

MENUDTV T.EDIT MENUTOP MENU ST ST ENTER GUIDE SEARCH

SBVIRTUALDIMMER

BANDRETURNEON

INPUTCHANNELCHANNEL

FRONT L

SOURCERECEIVER RECEIVER

SLEEP DVDSTB DVR/TV DIRECTAV

INPUTVIDEOFRONT FM/AM

SELECTCHLEVEL TEST TONE

ADVANCED AUTO

SOUND SIGNAL MODEDIALOG SELECT MUTE

MASTER VOLUME

TUNE

AUDIO

TUNE

B

DISC

ENTER

10

TVCONTROL

RECEIVER

SURROUNDSURROUND

SUBTITLE

A

D

VOLUME

ATT RF

D.ACCESS

E

MPX

STEREO

CLASS

C

DISPLAY

FRONT L

	FRONT R	• Dry Cell Battery (R6P, AA)
	FRONT R
		(VEM1030)
	CENTER
	CENTER
	SURROUND L

SURROUND L

SURROUND R

SURROUND R

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1 2 3 4

2. EXPLODED VIEWS AND PARTS LIST

A

NOTES: 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.)

2.1 PACKING

B

1

2

3

4

5

9

C

20

14
	11
17	13
	12
	18

D

15

E

16

19

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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
16	Right Pad 301	AHA7408
17	Spacer	AHB7088
18	Packing Sheet	AHG7015
19	Packing Case	AHD8158
20	Coaxial Cable	ADE7087

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B

C

D

E

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1	2	3	4
2.2 EXTERIOR SECTION
		6
A		7

18

5

18

17

B

12

17

NON-CONTACT SIDE

CONTACT SIDE

18

		Refer to
C		"2.3 INTERIOR SECTION".
		25
		B
		20
	20	29
D	20
		A

27

E	20
	20
	Refer to
	"2.4 FRONT PANEL SECTION".
	22
	4
F

18

26				18
				19		18
					18	8
		10
					18
28			A
			1			18
			23
				24		9
			*Serial Number Label is put on
				bottom of Under Base.
			22
			I			21
					13
20				22
		2		14
			20
A	18	16	22
3
						22
O					20
					15
20
			20	15	22
14		22	16

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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
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

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B

C

D

E

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2

3

4

2.3 INTERIOR SECTION

A

B

B

18

31 A

C

6

33

19

D31

24

25

E

F

10

1

13	I	31
14		4	31

	H
	31
L	31

34

31

33

22

N

32

A

32

B

C

D

31

31

31

F

E

3	P	M

5

31

23

12

L I

H

M

F

D

D

28

27

29

VSX-C301-S

2

3

NON-CONTACT SIDE

CONTACT SIDE

C

31 1

N

31

16

31

F

31

17

31

7

N

E

8 H

E

J

9

31

C

31

10

Q

26

30

4

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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• • • • • •

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

A

B

C

D

E

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1

2

3

4

2.4 FRONT PANEL SECTION

A

19

B

7

8

C

10

11

D

E

F

22	22

22

M 2

		20
18		22
G		22
	17	3
1
		L		22
15
			22
		16
		21		22
		6
5				K
12				4
14
	12	CONTACT-NON		CONTACTSIDE
13			SIDE
		10
		11

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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
NSP 21	Display Window 301	AAK8083
22	Screw	PPZ30P080FMC

A

B

C

D

E

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2

3

4

3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM

3.1 BLOCK DIAGRAM

A 3.1.1 AUDIO AND VIDEO BLOCK

			CN1204				FM/AM TUNER
	(19P)						A MODULE		D MOTHER ASSY
	CN4102	FRONT L	(19P)
FRONT L	17		3					7
DIGITAL	8	F. OPT	12				CN801(13P)
IN									LOW PASS FILTER
	FRONT IN		3	8	CN1262				IC1101 (1/2)	NJM4558MD
					(19P)				NJM4558MD
G ASSY(1/2)										IC1105 (1/2)
									3	2
			FRONT L		CN701				1
									2	1
			3	8	(19P)					3
B
	7
AUDIO INPUT	8	9								IC1102 (1/2)
L CH										NJM4558MD
DVD	2	5								3
										1
TV/SAT	3									2
								IC1261 (1/2)
					CN901		CN1263
VIDEO	4		2					NJM2100M
				1	(19P)	INPUT L	(19P)	3
			3		19		19
DVR/VCR	10	12						1		IC1103 (1/2)
								2
DVR OUT			IC702 (1/2)							NJM4558MD
	11									3
			UPC4570G2
										1
	IC701 NJU7312AM									2
DIGITAL
	SELECTOR
AUDIO INPUT
						COAX
DVD					11		11
C	IC901 TC7WU04F									IC1103 (2/2)
OPT 1					7	OPT1	7			NJM4558MD
TV/SAT										5
OPT 2						OPT2				7
					9		9			6
DVR/VCR

C AUDIO INPUT ASSY

CN9001				CN1264							CN1265
(19P)		4	10	(10P)	23	11		8	4	2	(23P)
12	OPT2			7			FLO				3
SR IN/OUT			OPT1	COAX	F.OPT	LIN		SLO		CO	SWO

D
1	13	16	20	22	21	CN1801
						(23P)
CN1811						CN1813	E
(13P)	3	7	11	15	13	(15P)
3

DSP KAWA

ASSY

				4	10	7	CN8003	3	3	7	11	15	13
				CN8017									CN8009
				(10P)			(13P)						(15P)
				5	1	3	7		31	27	25	23	24
E
	IC2501 NJM2296M								IC8401 AK4529VQ
				IC8401			28	9		8 ch CODEC
VIDEO INPUT	FUNCTION SELECTOR		VIDEO
				AK4114VQ
DVD	13 VIN1		OUTPUT	DIR & DIT
TV/BS		VOUT3 11	DVR/VTR
	7	VIN3
DVR/VTR	9	VIN2	(to TV)				IC8501 DSPD56367PV150(AX6)
		VOUT1 1					DSP for DECODE
VIDEO	5	VIN4

	CONTROL B VIDEO ASSY CN2501		F DSP ASSY
F	(19P)		SR IN/OUT
	INPUT	8
	OUTPUT
	14		VSX-C301-S
	1	2	3	4

5

6

7

8

																							A
													H AMP KAWA ASSY
				ANDREW				PREAMP							I	6CH AMP
IC1221 BD3814FV							IC1305									ASSY
				IC1301 (1/2)		NJU7311AM
6 CH E.VOL								IC1501 (2/2)								IC3301			CN4705 CN4703
				NJM4558MD
								UPC4570G2			CN4701		CN4706			STK402-270 CN3001				(23P)	(19P)
						29			CN1501						CN3002
				5				5				(17P)	(23P)				(23P)
19	FL	FL	27		7		27	7	(17P)	FL OUT		6	9	FL	(23P)	1	6	7	FL OUT	17	3	FL OUT
	IN	OUT		6		28		6	12						15		7	8		16	4
																POWER							B
																16 AMP	18	14	C OUT	10	6	C OUT
																	19	15		9	7
				IC1302 (2/2)				IC1502 (1/2)
				NJM4558MD
								UPC4570G2
						2
13 SL		SL		5			4	5
			30		7			7	5	SL OUT		13	4	SL	20	1	6	22 SL OUT		2	10 SL OUT
	IN	OUT		6		3		6								POWER	7	23		1	11
																AMP
				IC1303 (1/2)				IC1503 (2/2)								IC3401
				NJM4558MD
						23		UPC4570G2								STK402-270
	C	C		5			21	5
15			29		7			7	7	C OUT		11	6	C	18
	IN	OUT		6		22		6
				IC1303 (2/2)				IC1503 (1/2)															C
				NJM4558MD
						8		UPC4570G2	CN9010
	SW SW			3			10	3	(17P)
9			32		1			1		SW OUT
				2		9			17
	IN	OUT						2
																	CN203				5 CH
									1	HP L							(19P)	RY301			SP OUT
																FL OUT	17
			IC9001 PD5863A														16	RY303			FL
		MAIN MICROCOMPUTER														C OUT	14
													PHONES
									10	HP L	10						13				C
					CN9006				CN1204			CN4102						RY304
									(19P)			(19P)
			1		(15P)											SL OUT	10
												FRONT IN					9				SL
			IN/OUT
											G ASSY(2/2)												D
			SR													SW OUT		RY304
																					SW
																	1
			1		CN4203											HP L	17
					(15P)		L FRONT ASSY										CN301
	Remote																(17P)
			17
	Sensor		IC4201 PE5368B
	Unit											STANDBY/ON				J AMP OUT ASSY
				FL CONTROL					1	P-ON
			MICROCOMPUTER			22						1
									4202			4501	S4501
									(3P)			(3P)
			V4301								M POWER SW ASSY
		FL DISPLAY																					E
							4206
							(5P)
							4401
							(5P)
					S4401,
					S4402
				K ENCODER ASSY																			F
				5					6		VSX-C301-S				7						8		15

1

2

3

4

3.1.2 POWER SUPPLY BLOCKS

A

POWER LINE

N PRIMARY ASSY

D MOTHER ASSY	B
	AUDIO
	INPUT
	ASSY
	D622-D625

B

P 12V ASSY

	Q
	VHVL ASSY
C	I
	6CH AMP
	ASSY
D

F DSP ASSY

E

D MOTHER ASSY

F

16		VSX	-C301	-S
1	2				3	4

5

6

7

8

A

B

C

D

E

F

		VSX	-C301	-S	7	17
5	6					8

1

2

3

4

3.2 OVERALL WIRING DIAGRAM

A

VIDEO ASSY	C
B (AWX8225)
	AUDIO INPUT ASSY
	(AWX8227)
	12V ASSY
	P (AWX8170)

B

	AC POWER CORD
	ADG7021
	AC INLET ASSY
	VKP2126
	N
C	PRIMARY ASSY
	(AWX8190)

D

J4601

ADX7442

E G

FRONT IN ASSY (AWX8219)

M L

POWER SW ASSY

F (AWX8174)

18		VSX	-C301	-S
1	2				3

D D 1/5- D 5/5

MOTHER ASSY (AWX8197)

	CN8003
F F 1/2- F 2/2	CN8009
DSP ASSY (AWX8241)
CN8012

FRONT ASSY (AWX8199)

4

5

6

7

8

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 (AXQ7245)

E

DSP KAWA ASSY (AWX8167)

J AMP OUT ASSY (AWX8177)

O D5V ASSY (AWX8224)

H

AMP KAWA ASSY (AWX8223)

DC FAN MOTOR

AXM7025

I

6CH AMP ASSY (AWM7786)

Q

VHVL ASSY (AWX8259)

A

B

C

D

E

K

ENCODER ASSY (AWX8175)

F

		VSX	-C301	-S	7	19
5	6					8

1

2

3

4

3.3 FM/AM TUNER MODULE

A

B

C

A FM/AM TUNER MODULE (AXQ7245)

FM FRONT END

(FM)

(FM)	(FM)

(FM)

(FM)

(FM)

D

(FM)

(AM)

E

F

A

20

1

(FM)

		(FM)	(FM)
	(AM)	(AM)
(AM)			(AM)
	MW RF TUNING BLOCK

(AM)

OSC : 981 - 2052kHz 9k step

VSX-C301-S

2

3

4

5

6

7

8

A

: The power supply is shown with the marked box.

(TX)

: AUDIO SIGNAL ROUTE (TUNER)

(AM)

: AM SIGNAL ROUTE

(FM)

: FM SIGNAL ROUTE

B

ATF7026
	(AM)
(AM)	(AM)(AM)	(AM)				CN801
							C
	(AM)			(TX)
			(FM)
					(TX)
	(FM)	(AM)				1/5
(AM)	IF+MPX IC			(TX)		D
	AM/FM
				(TX)
(FM)	(FM)
(AM)		(TX)
	L201						D
	ATE7003
							E
PLL IC

F

A

		VSX	-C301	-S	7	21
5	6					8

1

2

3

4

3.4 VIDEO ASSY

A

VIDEO BLOCK

B VIDEO ASSY (AWX8225)

B

C

D

REAR PANEL

E

F

B

IC2501 NJM2296M

D 1/5 CN9001

: VIDEO SIGNAL ROUTE

: The power supply is shown with the marked box.

B

22		VSX-C301-S
1	2		3	4

5

6

7

8

A

B

C

D

E

F

		VSX-C301-S			7	23
5	6					8

1

2

3

4

3.5 AUDIO INPUT ASSY

A
(A)
(A)	(A)
(A)
B
(A)
(A)
C

C AUDIO INPUT ASSY (AWX8227)

D

(A)

(D)

(D)

E

(D)

(D)

(D)

(A)

F

C		D 2/5 CN1263
24		VSX-C301-S
1	2	3	4

5

6

(A)

(A)

(A)

(A)

(A)

P 601

CAUTION : FOR CONTINUED PROTECTION

AGAINST RISK OF FIRE.

REPLACE ONLY WITH SAME TYPE

NO. 49102.5 FOR IC820 AND IC821

MFD, BY LITTELFUSE INC.

5

6

7

8

D 2/5 CN1262

From

T1 PT

(A)

: AUDIO SIGNAL ROUTE (ANALOG)

(D)

:AUDIO SIGNAL ROUTE (DIGITAL)

:The power supply is shown with the marked box.

					C
	-C301
VSX		-S	7	25
				8

A

B

C

D

E

F

1

2

3

4

3.6 MOTHER ASSY (1/5)

A

D 2/5

B

A CN201

C

B CN2501

D

D 2/5

E

F

	D	1/5	: The power supply is shown with the marked box.							N	CN551
26
				VSX	-C301	-S
1			2				3	4

5

6

7

L CN4203

D 1/5 MOTHER ASSY (AWX8197)

DC DETECT: 3-4V OVERLOAD DETECT: 2-3V Short-circuit Fan and Power supply circuit: less than 2V (VH/VL)

F 2/2 CN8012

VSX-C301-S

5

6

7

8

A

B

C

D 3/5

D

D 2/5

E

D 2/5

F

D 1/5

27

8

1

2

3

3.7 MOTHER ASSY (2/5) and DSP KAWA ASSY

4/5

1/5

D

A

D

B

C

G CN4102

C CN701

(A)

(A)

(A)

(A)

INPUT ATT

D

CN901	(D)
C	(A)

E

(A)	(A)

(D)

F

F 1/2	CN8017	F 1/2
D 2/5 E
		CN8003
28		VSX-C301-S
1	2	3

4

D 1/5

NORMAL : 0V

OVERLOAD : 5V

(A)

(A)

(A)

IATT

ON : +12V

OFF : -12V

A/D OVERLOAD

DETECT

(A)

(A)

(A)

(A)

E

		DSP KAWA ASSY
(A)	(A)	(AWX8167)

(A)

(A)

F 1/2 CN8009

4

5

6

D 2/5 MOTHER ASSY (AWX8197)

LOW PASS FILTER

(A)

(A)

(A)

(A)

7

8

(A)

A

: AUDIO SIGNAL ROUTE (ANALOG)

(D)

: AUDIO SIGNAL ROUTE (DIGITAL)

B

C

(A)

D 3/5

(A)

D

For SP CONFIG. MIX AMP

(A)

E

F

: The power supply is shown with the marked box.

D 2/5

		VSX	-C301	-S	7	29
5	6					8

1			2		3			4
3.8 MOTHER ASSY (3/5)
										1/5
A								D
			D	3/5 MOTHER ASSY (AWX8197)

B

D 2/5

(A)

(A)	(A)	(A)

C

D

E

F

D 3/5

30		VSX	-C301	-S
1	2				3	4