Sony MHC-NX1, MHC-NX3AV Service Manual

MHC-NX1/NX3AV

HCD-NX1/HCR-NX3

	SERVICE MANUAL	US Model
		Canadian Model
	• MHC-NX1/NX3AV is composed of following models.	AEP Model
		UK Model
	As for the service manual, it is issued for each component model,
	then, please refer to it.	E Model

COMPONENT MODEL NAME FOR MHC-NX1/NX3AV

MHC-NX1 MHC-NX3AV

TUNER,AMPLIFIER	STR-NX1	STR-NX3
CD PLAYER ,TAPE DECK	HTC-NX1
FRONT SPEAKER SYSTEM	SS-NX1
CENTER/REAR		SS-RC100
SPEAKER SYSTEM

HCD-NX1 is composed of STR-NX1 and HTC-NX1. HCR-NX3 is composed of STR-NX3 and HTC-NX1.

MHC-NX1/NX3AV

Tourist Model

MHC-NX1

Australian Model

MHC-NX3AV

• Abbreviation
AED : North European	AUS : Australian
CND : Canadian	G : German
JE : Tourist	KR : Korean
MY : Malaysia	SP : Singapore
TH : Thai

PARTS LIST

Ref. No. Part No.	Description	Remark	Ref. No. Part No.	Description	Remark
ACCESSORIES & PACKING MATERIALS			3-867-107-21	MANUAL,INSTRUCTION (FRENCH,SPANISH)
********************************					(NX3:CND,AEP,MY,SP)
1-418-548-11 REMOTE COMMANDER (RM-SX10) (NX1)			3-867-107-31	MANUAL,INSTRUCTION (GERMAN) (NX3:AEP,G)
1-418-549-11 REMOTE COMMANDER (RM-SX15) (NX3AV)			3-867-107-41	MANUAL,INSTRUCTION
1-501-374-11 ANTENNA,LOOP				(DUTCH,ITALIAN,PORTUGUESE) (NX3:AEP)
1-501-594-11	ANTENNA (FM) (AEP,UK)		3-867-107-51	MANUAL,INSTRUCTION
1-501-659-41	ANTENNA (FM) (US,CND,E,AU,JE)			(DANISH,FINISH,SWEDISH) (NX3:AED)
			3-867-107-61	MANUAL,INSTRUCTION (POLISH,RUSSIAN)
1-769-306-11 CORD,SPEAKER (1.5m) (FOR SS-NX1)					(NX1:CIS)
1-769-433-11 CORD,SPEAKER (1m) (FOR SS-RC100)
1-769-433-21 CORD,SPEAKER (2.5m) (FOR SS-RC100)			3-867-107-71	MANUAL,INSTRUCTION (CHINESE) (NX3:MY,SP)
3-867-106-11	MANUAL,INSTRUCTION (ENGLISH)		3-867-107-81	MANUAL,INSTRUCTION (KORIAN) (NX3:KR)
	(NX1:US,CND,AEP,UK,CIS,MY,SP,JE)		3-867-339-11	MANUAL,INSTRUCTION (CZECH) (NX3,AED)
3-867-106-21	MANUAL,INSTRUCTION (FRENCH,SPANISH)		3-867-339-21	MANUAL,INSTRUCTION (HUNGARIAN)
	(NX1:CND,AEP,MY,SP)				(NX3,AED)
3-867-106-31	MANUAL,INSTRUCTION (GERMAN) (NX1:AEP,G)		3-867-339-31	MANUAL,INSTRUCTION (GREEK) (NX3,AED)
3-867-106-41 MANUAL,INSTRUCTION			3-867-339-41	MANUAL,INSTRUCTION (TURKISH) (NX3,AED)
	(DUTCH,ITALIAN,PORTUGUESE) (NX1:AEP)		3-867-340-11	MANUAL,INSTRUCTION (CZECH) (NX3,AED)
3-867-106-51 MANUAL,INSTRUCTION			3-867-340-21	MANUAL,INSTRUCTION (HUNGARIAN)
	(DANISH,FINISH,SWEDISH) (NX1:AED)				(NX3,AED)
3-867-106-61	MANUAL,INSTRUCTION (POLISH,RUSSIAN)		3-867-340-31	MANUAL,INSTRUCTION (GREEK) (NX3,AED)
		(NX1:CIS)	3-867-340-41	MANUAL,INSTRUCTION (TURKISH) (NX3,AED)
3-867-106-71	MANUAL,INSTRUCTION (CHINESE) (NX1:MY,SP)		3-867-790-11	MANUAL,INSTRUCTION (ENGLISH,FRENCH,
3-867-106-81	MANUAL,INSTRUCTION (KORIAN) (NX1:KR,JE)			GERMAN,SWEDISH,RUSSIAN) (SS-NX1)
3-867-106-91	MANUAL,INSTRUCTION (PORTUGUESE)		3-867-936-11	MANUAL,INSTRUCTION (THAI) (NX1:TH)
		(NX1:JE)	4-210-254-01	CUSHION (FOOT) (FOR SS-NX1)
3-867-107-11	MANUAL,INSTRUCTION (ENGLISH)		4-981-643-21	COVER,BATTERY (FOR RM-SX10/SX15)
	(NX3:US,CND,AEP,UK,CIS,MY,SP,AUS)

MINI Hi-Fi COMPONENT SYSTEM

MICROFILM

	Sony Corporation	99H001688-1
		Printed in Japan ©1999.8
9-928-979-11	Home Audio Company	Published by Quality Assurance Dept.

STR-NX1/NX3

SERVICE MANUAL

US Model

Canadian Model

AEP Model

UK Model

E Model

Australian Model

Tourist Model

STR-NX1/NX3 are the
Tuner and Amplifier
Section in HMC-NX1/NX3AV.	Photo: STR-NX3 E model

SPECIFICATIONS

– Continued on next page –

TUNER/AMPLIFIER

MICROFILM

	TABLE OF CONTENTS
1.	SERVICING NOTES ...............................................	3
2.	GENERAL ...................................................................	4
3.	DISASSEMBLY .........................................................	6
4.	TEST MODE ..............................................................	8

5.DIAGRAMS

5-1.	Note for Printed Wiring Boards and
	Schematic Diagrams .......................................................	11
5-2.	Schematic Diagram – MAIN Board (1/3) – ...................	12
5-3.	Schematic Diagram – MAIN Board (2/3) – ...................	13
5-4.	Schematic Diagram – MAIN Board (3/3) – ...................	14
5-5.	Printed Wiring Board – MAIN Board – ........................	15
5-6.	Printed Wiring Board – SURROUND AMP Board – ...	16
5-7.	Schematic Diagram – SURROUND AMP Board – ......	17
5-8.	Printed Wiring Board – PA Board – ..............................	18
5-9.	Schematic Diagram – PA Board – .................................	19
5-10.	Printed Wiring Boards – PANEL Section – ..................	20
5-11.	Schematic Diagram – PANEL Section – .......................	21
5-12.	Printed Wiring Boards
	– TRANSFORMER Section – ........................................	22
5-13.	Schematic Diagram – TRANSFORMER Section – ......	23
5-14. IC Pin Function Description ...........................................		24
6.	EXPLODED VIEWS ................................................	26
7.	ELECTRICAL PARTS LIST ...............................	30

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS

AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

ATTENTION AU COMPOSANT AYANT RAPPORT À LA SÉCURITÉ!

LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0

SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

2

SECTION 1

SERVICING NOTES

SAFETY CHECK-OUT

After correcting the original service problem, perform the following safety check before releasing the set to the customer:

Check the antenna terminals, metal trim, “metallized” knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below.

LEAKAGE TEST

The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 mA (500 microamperes). Leakage current can be measured by any one of three methods.

1.A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers’ instructions to use these instruments.

2.A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job.

3.Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The “limit” indication is 0.75 V, so analog meters must have an accurate lowvoltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2 V AC range are suitable. (See Fig. A)

To Exposed Metal

Parts on Set

0.15 F				1.5 kΩ	AC
					voltmeter
					(0.75 V)

• MODEL IDENTIFICATION

– Rear Panel –

PART No.

	MODEL	PART No.
	NX1: AEP, UK and Korean models	4-221-391-0[]
	NX1: US and Canadian models	4-221-391-1[]
	NX1: Malaysia, Singapore, Thai and	4-221-391-2[]
	Tourist models
	NX3: AEP, UK, Korean and Australian models	4-221-391-3[]
	NX3: US and Canadian models	4-221-391-4[]
	NX3: Malaysia and Singapore models	4-221-391-5[]

Earth Ground

Fig. A. Using an AC voltmeter to check AC leakage.

3

• LOCATION OF CONTROLS

– Front Panel –

8 q; qs qf qh

7 9 qa qd qg qj

1

2

3

4

5

6

wf wg wh wj wk wl e;

– Rear Panel –

1 2

3

4

5

6

7

8

q;

qa qs

SECTION 2

GENERAL

			1	TIMER indicator (US, Canadian, AEP and UK models)
			2	DISPLAY button
			3	?/1 button and indicator
			4	POWER SAVE/DEMO (STANDBY) button
			5	–m button
			6	+ M button
	qk		7	FILE SELECT button
			8 VIDEO/DVD button
	ql
		w;	9	EDIT button

			q; MD button
			qa REPEAT button
			qs TAPE button
	wa		qd PLAY MODE button
			qf CD button
			qg DBFB button
		ws	qh TUNER button
		wd	qj DSP button
			qk TUNER BAND button
			ql STEREO/MONO button
			w; TUNER MEMORY button
			wa GROOVE button and indicator
			ws MIC LEVEL knob
			wd MIC jack
			wf PHONES jack
			wg Remote sensor
			wh Jog dial
			wj ENTER button and indicator
			wk DVD 5.1CH button and indicator (STR-NX3)
			wl PRO LOGIC button and indicator (STR-NX3)
			e; VOLUME knob

1 AM ANTENNA terminals

2 FM ANTENNA terminal

3 SYSTEM CONTROL connector

4 VIDEO (AUDIO) IN jacks

5 MD IN jacks

96 MD OUT jacks

7 DVD 5.1CH INPUT jacks (STR-NX3)

8 SUPER WOOFER OUT jack

9 VOLTAGE SELECTOR switch (Malaysia, Singapore and Tourist models)

q; FRONT SPEAKER terminals qa REAR SPEAKER terminals

qs CENTER SPEAKER terminals (STR-NX3)

4

This section is extracted from instruction manual.

5

SECTION 3

DISASSEMBLY

Note: Follow the disassembly procedure in the numerical order given.

CASE

2 screw

(BVTP3 × 10)

3 case

1two screws (case 3 TP2)

1 two screws (case 3 TP2)

FRONT PANEL ASS’Y

1flat wire (CN132)

4 front panel ass’y

3 claw

1 flat wire (CN131)

2 two screws	3 claw
(BVTT3 × 6)

6

BACK PANEL ASS’Y

2 connector (CN173)

1 flat wire (CN1)

5 back panel ass’y

3 seven screws (BVTP3 × 10)

4 claw

3 four screws
(BVTP3	× 10)	4 claw

MAIN BOARD

1 connector (CN111)

1 two connectors (CN161, 181)

2 two screws (BVTP3 × 10)

3 connector (CN152)

4 main board

7

SECTION 4 TEST MODE

[CD Delivery Mode]

•Execute only if connected to the HTC-NX1.

•This mode moves the optical pick-up to the position durable to vibration. Use this mode when returning the set to the customer after repair.

Procedure:

1.Press the ?/1 button to turn the power ON.

2.Press the [ENTER] and ?/1 buttons simultaneously.

3.A message “LOCK” is displayed on the liquid crystal display, and the CD delivery mode is set.

[Change-over the MW Tuning Interval] (EXCEPT AEP and UK models)

• The MW tuning interval can be changed over 9 kHz or 10 kHz.

Procedure:

1.Press the ?/1 button to turn the power ON.

2.Press the [TUNER] button to select the function “TUNER”, and press the [TUNERBAND] button to select the BAND “MW”.

3.Press the ?/1 button to turn the power OFF.

4.Press the [TUNER MEMORY] and ?/1 buttons simultaneously, and the display on the liquid crystal display changes to “MW 9 k STEP” or “MW 10 k STEP”, and thus the tuning interval is changed over.

[MC Cold Reset]

• The cold reset clears all data including preset data stored in the RAM to initial conditions. Execute this mode when returning the set to the customer.

Procedure:

1.Turn the power ON or set to the DEMO mode.

2.Press the [GROOVE] and ?/1 buttons simultaneously.

3.The set is reset, and displays “COLD RESET”, then becomes DEMO mode.

[Amplifier Test Mode]

Procedure:

1.Press the ?/1 button to turn the power ON.

2.Press three buttons of [ENTER] , [DISPLAY] , and [TUNER BAND] simultaneously.

3.“ALC OFF” is displayed, then the function which was set before the test mode became active is displayed.

[LED and Liquid Crystal Display All Lit, Software Version Display, Key Check, VACS Level Display Mode]

Procedure:

1.Press the ?/1 button to turn the power ON.

2.Press three buttons of [ENTER] , [DISPLAY] , and [STEREO/MONO] simultaneously.

3.LEDs and liquid crystal display are all turned on.

Rotating the JOG dial changes over the check patterns of liquid crystal display.

4.Successively, the following three modes can be activated.

(1) Press the [VIDEO/DVD] button, and the software version is

displayed on the liquid crystal display.

(2)Press the [MD] button, and the key check mode is activated. In the key check mode, the liquid crystal display displays “K 0 J0 V0”. Each time a button is pressed, “K” value increases. However, once a button is pressed, it is no longer taken into account.

“J” value increases like 1, 2, 3 ... if turn the JOG dial clockwise, or it decreases like 0, 9, 8 ... if turn the JOG dial counterclockwise.

“V” value increases like 1, 2, 3 ... if turn the [VOLUME] dial clockwise, or it decreases like 0, 9, 8 ... if turn the JOG dial counterclockwise.

(3)Press the [TAPE] button, and the VACS level is displayed on the liquid crystal display.

5.To release from these mode, press three buttons in the same manner as step 2, or remove the power cord.

[MC Hot Reset]

• This mode resets the set with the preset data kept stored in the memory. The hot reset mode functions same as if the power cord is plugged in and out.

Procedure:

1.Turn the power ON or set to the DEMO mode.

2.Press three buttons of [ENTER] , [DISPLAY] , and [TUNER MEMORY] simultaneously.

3.The set is reset, and becomes standby state.

[Change-over of VACS ON/OFF]

Procedure:

1.Press the ?/1 button to turn the power ON.

2.Press three buttons of [ENTER] , [DISPLAY] , and [GROOVE] simultaneously, and the display on the liquid crystal display changes to “VACS ON” or “VACS OFF”, and thus the VACS ON/OFF is changed over.

[VIDEO input, Record and CD play in CD function]

• Execute only if connected to the HTC-NX1.

Procedure:

1.	Press the			?/1	button to turn the power ON.
2.	Press three buttons of [ENTER] , [DISPLAY] , and
		- m	simultaneously.

3.“DVD 5.1CH” is displayed on liquid crystal display, and at the same time, CD is played and the deck B is placed in the record status.

[CD Service Mode]

•Execute only if connected to the HTC-NX1.

•This mode can run the CD sled motor optionally. Use this mode, for instance, when cleaning the optical pick-up.

Procedure:

1.Press the ?/1 button to turn the power ON.

2.Press the [CD] button to select the function “CD”.

3.Press three buttons of [ENTER] , [POWER SAVE/DEMO] , and [STEREO/MONO] simultaneously.

4.Set to the Sled Servo mode.

5.With the CD in stop status, turn the JOG dial clockwise to move the optical pick-up to outside track, or turn it counterclockwise to inside track.

6.To release from this mode, perform as follows.

1)Move the optical pick-up to the most inside track.

2)Remove the power cord.

Notes: • Always move the optical pick-up to most inside track when releasing from this mode. Otherwise, a disc will not be unloaded.

• Do not run the sled motor excessively, otherwise the gear can be chipped.

8

[Aging Mode]

• Execute only if connected to the HTC-NX1.

This mode can be used for operation check of CD section and tape deck section.

CD section and tape deck section work in parallel.

• If an error occurred:

The aging operation stops only an error occurred sections and display then status.

• If no error occurs:

The aging operation continues repeatedly.

Procedure:

1.Set disc in DISC5 tray.

2.Load the tapes into the decks A and B respectively.

3.Press the [PLAY MODE] button to set the “ALL DISCS” mode, and press the [REPEAT] button to “REPEAT” off.

4.Press the [CD] button to select the function “CD”.

5.Press three buttons of [ENTER] , [POWER SAVE/DEMO] , and [TUNER BAND] simultaneously.

6.The aging mode is activated, if the indicator of disc tray number on the liquid crystal display is blinking.

7.To release from the aging mode, press the ?/1 button to turn the power OFF and operate the cold reset. (Refer to the “MC Cold Reset”)

1. Display at the Aging Mode

•Display operating state of CD section and tape deck section alternately.

•If an error occurred, stop display which that section.

2. CD Section

•Display at the aging mode is the same as the normal operation.

•The sequence during the aging mode is following as below.

Aging mode sequence (CD section) :

Open the disc1 tray

Disc5 chucking

Disc5 TOC read

Disc5 play track1 for 2 seconds

Disc5 play last track for 2 seconds

• Display at an error occurred 1) Display of the error count

(1)Press three buttons of [ENTER] , [POWER SAVE/DEMO] , and [GROOVE] simultaneously.

(2)Display of the error count following as below.

Display

EMC**EDC**

Notes:

EMC**: The number of mechanical error.

EDC** : The number of no disc error after chucking the disc.

2) Display of mechanical error

Display

E**M##$$&&

Notes:

**: The number of mechanical error.(“00” is latest one)

(Press the [PLAY MODE] button to changes next error display) ## : Not used.

$$ : Loading error. (Second figure is not used)

D : The error in the midst of close at the except mechanical trouble. E : The error in the midst of open at the except mechanical trouble. C : The error in the midst of chuck up at the except mechanical

trouble.

F : The error in the midst of EX-open at the except mechanical trouble.

&&: Loading error. (Second figure in not used) 1:The error in the midst of chuck up. 2:The error in the midst of chuck down. 3:Time up of EX-open

4:Time up of EX-close.

3) Display of no disc error

Display

E**D##$$&&

Notes:

**: The number of mechanical error.(“00” is latest one)

(Press the [REPEAT] button to changes next error display)

##:

01: Focus error 02: GFS error 03: Set up error

$$:

00: No disc error when does not chucking retry.

02: No disc error when chucking retry to completion.

&&: The state when judged no disc error. (Second figure is not used) 1:Stop

2:Set up 3:TOC read 4:Access 5:Play 6:Pause

7:Manual search (Play)

8:Manual search (Pause)3. Tape Deck Section

9

3. Tape Deck Section

•The sequence during the aging mode is following as below.

•If an error occurred, stop display that step.

Aging mode sequence (Tape deck section) :

Rewind the tape A and B

“TAPE A AG-1”

Shut off

FWD play the tape A

“TAPE A AG-2”

2 minutes

Fast forward the tape A

“TAPE A AG-3”

Shut off or 20 seconds

REV play the tape A

“TAPE A AG-4”

2 minutes

Rewind the tape A

“TAPE A AG-5”

Shut off

FWD play the tape B

“TAPE B AG-2”

2 minutes

Fast forward the tape B

“TAPE B AG-3”

Shut off or 20 seconds

REV play the tape B

“TAPE A AG-4”

2 minutes

Rewind the tape B

“TAPE B AG-5”

Shut off

Note: “TAPE * AG-*” is display of each step.

10

SECTION 5

DIAGRAMS

5-1. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS

Note on Printed Wiring Board:

•X : parts extracted from the component side.

•Y : parts extracted from the conductor side.

•x : parts mounted on the conductor side.

•b: Pattern from the side which enables seeing.

(The other layers' patterns are not indicated)

•Indication of transistor.

Q

B C E

These are omitted.

Q

B C E

These are omitted.

Note on Schematic Diagram:

•All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums.

•All resistors are in Ω and 1/4 W or less unless otherwise specified.

•f : internal component.

•2: nonflammable resistor.

•5: fusible resistor.

•C : panel designation.

Note:	Note:
The components identi-	Les composants identifiés par
fied by mark 0or dotted	une marque 0sont critiques
line with mark 0are criti-	pour la sécurité.
cal for safety.	Ne les remplacer que par une
Replace only with part	pièce portant le numéro
number specified.	spécifié.

•U : B+ Line.

•V : B– Line.

•Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions.

no mark : TUNER (FM)

•Voltages are taken with a VOM (Input impedance 10 MΩ). Voltage variations may be noted due to normal production tolerances.

•Waveforms are taken with a oscilloscope.

Voltage variations may be noted due to normal production tolerances.

•Circled numbers refer to waveforms.

•Signal path.

F : TUNER (FM)

E : TAPE PLAYBACK G : RECORD

J : CD PLAY

N : MIC INPUT

•Abbreviation

AUS	: Australian model	MY	: Malaysia model
CND	: Canadian model	SP	: Singapore model
JE	: Tourist model	TH	: Thai model
KR	: Korean model

• Circuit Boards Location

SUB TRANS board

(US, Canadian, AEP, UK)

TRANS board

BACK LIGHT board

PANEL baord

R board

• IC Block Diagram

– MAIN Board –

	IC401		BA3830F
			REFERENCE	RESET	18	RESET
	R02	1
			CURRENT
	R01	2	REFERENCE
			CURRENT
	LINE NF	3			17	F01
					16	F02
	LINE IN	4	–	BAND
					15	F03
			+	PASS	14	F04
				FILTER
					13	F05
				DET
					12	F06
	REC NF	5
	REC IN	6	–		11	REC LEVEL
			+
					10	VCC
	RESET C	7
	BIAS C	8
	GND	9

• Waveforms

– MAIN Board –

1 IC501 q; (XCIN)

1.4 Vp-p

32.768 kHz

2 IC501 qd (XOUT)

3 Vp-p

16 MHz

TUNER pack

SURROUND AMP board (NX3)

MAIN board

PA board

11 11

STR-NX1/NX3

5-2. SCHEMATIC DIAGRAM – MAIN Board (1/3) –

(Page

19)

(Page

17)

(Page

14)

(Page 13)

12 12

STR-NX1/NX3

5-3. SCHEMATIC DIAGRAM – MAIN Board (2/3) – See• page 11 for Waveforms.

(Page 12)
(Page 23)
	(Page 14)
13	13

STR-NX1/NX3

5-4. SCHEMATIC DIAGRAM – MAIN Board (3/3) – See• page 11 for IC Block Diagram.

(Page 12)	(Page 21)
(Page 13)
	(Page 23)
	(Page 23)
	(Page 21)
14	14

• Semiconductor Location

Ref. No.	Location		Ref. No.	Location
D141	A-8		IC921	C-2
D216	E-9		Q112	A-8
D501	B-2
D502	D-1		Q113	A-8
D503	D-1		Q114	G-6
D504	E-1		Q162	A-9
D505	E-1		Q163	A-9
D506	E-1		Q164	G-6
D507	F-1		Q191	G-11
D508	E-2		Q281	D-8
D510	C-1		Q282	D-7
D901	B-5		Q291	D-8
D902	A-5		Q411	D-5
D903	B-5		Q421	C-3
D904	A-4		Q431	E-6
D905	A-6		Q432	D-6
D906	A-6		Q461	D-5
D914	A-3		Q501	F-1
D915	B-3		Q502	F-1
D920	B-4		Q503	F-1
D921	B-3		Q901	A-6
D922	E-7		Q902	A-6
D923	E-7		Q903	A-6
D924	D-6		Q904	A-3
D925	B-4		Q905	A-3
D931	A-4		Q906	B-3
D932	A-4		Q907	B-4
			Q921	B-3
IC101	B-9		Q923	C-3
IC201	E-9		Q924	B-3
IC401	E-5		Q951	B-6
IC501	E-3		Q952	B-6
IC502	E-1		Q953	B-6
IC901	A-2

STR-NX1/NX3

5-5. PRINTED WIRING BOARD – MAIN Board – See• page 11 for Circuit Boards Location.

(Page 22)

(Page 22)

(Page

20)

(Page 22)

(Page

20)

(Page 16)

(Page 18)

15 15

STR-NX1/NX3

5-6. PRINTED WIRING BOARD – SURROUND AMP Board – See• page 11 for Circuit Boards Location.

• Semiconductor

Location

Ref. No.	Location
D101	C-2
D102	C-3
D151	C-2
D191	C-2
IC101	A-2
Q101	B-3
Q103	A-3
Q104	A-3
Q151	B-2
Q181	C-1

(Page 15)

(Page 18)

16 16

STR-NX1/NX3

5-7. SCHEMATIC DIAGRAM – SURROUND AMP Board –

(NX3)

(Page 12)

(Page 19)

The components identified by	Les composants identifiés par une
mark 0 or dotted line with	marque 0 sont critiques pour la
mark 0are critical for safety.	sécurité.
Replace only with part numNe les remplacer que par une pièce
ber specified.	portant le numéro spécifié.

17 17

STR-NX1/NX3

5-8. PRINTED WIRING BOARD – PA Board – See• page 11 for Circuit Boards Location.

(Page 15)

(Page

16)

(Page 22)

• Semiconductor Location

Ref. No.	Location		Ref. No.	Location		Ref. No.	Location
D802	B-5		IC801	C-8		Q829	G-4
D821	E-4		Q801	B-5		Q830	G-4
D831	C-6					Q831	C-7
D852	C-5		Q821	D-7		Q851	C-5
D871	B-10		Q822	D-7		Q881	B-10
D881	E-2		Q823	C-7		Q882	B-9
D882	H-2		Q824	C-7		Q883	C-9
D883	A-11		Q825	H-4		Q884	C-9
D884	C-11		Q826	H-4		Q885	D-9
D885	F-10		Q827	H-4		Q886	D-9
			Q828	G-4

18 18

5-9. SCHEMATIC DIAGRAM – PA Board –

The components identified by	Les composants identifiés par une
mark 0 or dotted line with	marque 0 sont critiques pour la
mark 0are critical for safety.	sécurité.
Replace only with part num-	Ne les remplacer que par une pièce
ber specified.	portant le numéro spécifié.

STR-NX1/NX3

(Page 23)

(Page 12)

(Page

17)

19 19

STR-NX1/NX3

5-10. PRINTED WIRING BOARDS – PANEL Section – See• page 11 for Circuit Boards Location.

(Page 15)

• Semiconductor

Location

Ref. No.

Location

D631

E-2

D632

F-4

D633

F-4

D636

G-5

D637

A-7

D638

D-7

D643

C-6

D644

C-7

D645

C-4

D646

C-5

D647

C-2

D648

C-3

IC701

F-2

Q631

E-1

Q632

F-3

Q633

E-3

Q636

F-5

Q637

B-7

Q638

D-7

Q641

D-7

Q642

D-7

Q643

D-7

(Page 15)

20 20

STR-NX1/NX3

5-11. SCHEMATIC DIAGRAM – PANEL Section –

(Page 14)

(Page 14)

21 21

STR-NX1/NX3

5-12. PRINTED WIRING BOARDS – TRANSFORMER Section – See• page 11 for Circuit Boards Location.

(MY, SP, JE / NX3:US, CND)

(NX1:US, CND)

JW953

(Page 15)

• Semiconductor

Location

Ref. No.	Location
D952	A-4
D953	A-5
D954	A-4
D955	A-5
D956	B-4
D957	A-3
IC991	A-3
Q991	A-3

(Page 15)

(Page 15)

(Page 18)

22 22

STR-NX1/NX3

5-13. SCHEMATIC DIAGRAM – TRANSFORMER Section –

(Page 19)

(Page 14)

(Page 13)

(Page 14)

The components identified by	Les composants identifiés par une
mark 0 or dotted line with	marque 0 sont critiques pour la
mark 0are critical for safety.	sécurité.
Replace only with part num-	Ne les remplacer que par une pièce
ber specified.	portant le numéro spécifié.

23 23

5-14. IC PIN FUNCTION DESCRIPTION

• MAIN BOARD IC501 M30622MA-A12FP (SYSTEM CONTROLLER )

	Pin No.	Pin Name	I/O		Description
	1	L+R	I	Spectrum analyzer drive signal input from the spectrum analyzer band-pass filter (IC401)
				(for VACS, non-stop signal)
	2	BPF SL	I	Spectrum analyzer drive (super low frequency) signal input from the spectrum analyzer band-pass
				filter (IC401) (for 40 Hz)
	3	F RELAY	O	Speaker protect relay drive signal output for the front side speaker				“H”: relay on
	4	R RELAY	O	Speaker protect relay drive signal output for the rear side speaker				“H”: relay on
	5	SIRCS	I	Remote control signal input from the remote control receiver (IC601)
	6	LINE MUTE	O	Line muting on/off control signal output terminal “L”: muting on
	7	DBFB	O	DBFB normal/high selection signal output to the M62493FP (IC101)
				“L”: DBFB high, “H”: DBFB low/off
	8	BYTE	I	External data bus line byte selection signal input terminal			Fixed at “L” in this set
	9	CNVSS	—	Ground terminal
	10	XCIN	I	Sub system clock input terminal (32.768 kHz)
	11	XCOUT	O	Sub system clock output terminal (32.768 kHz)
	12	RESET	I	System reset signal input from the reset signal generator (IC502)				“L”: reset
				For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
	13	XOUT	O	Main system clock output terminal (16 MHz)
	14	VSS	—	Ground terminal
	15	XIN	I	Main system clock input terminal (16 MHz)
	16	VCC	—	Power supply terminal (+5V)
	17	NMI	I	Non-maskable interrupt input terminal	Fixed at “H” in this set
	18	WAKE UP	O	Wakeup control signal output to the CPU on the HTC-NX1 “H” active
	19	PHONES MUTE	O	Muting on/off control signal output terminal		“L”: muting on Not used (open)
	20	RDS INT	I	RDS serial data transfer clock signal input from the tuner pack
				(Used for the AEP and UK models only)
	21	RDS DATA	I	RDS serial data input from the tuner pack (Used for the AEP and UK models only)
	22	AC CUT	I	AC off detection signal input from the reset signal generator (IC502) “L”: AC cut checked
	23	PL CLK	O	Serial data transfer clock signal output to the M62464FP (IC201)
				(Used for the STR-NX3 only)
	24	PL DATA	O	Serial data output to the M62464FP (IC201)		(Used for the STR-NX3 only)
	25	PL LAT	O	Serial data latch pulse output to the M62464FP (IC201)			(Used for the STR-NX3 only)
	26	STK POWER	O	Power amplifier on/off selection signal output terminal			“L”: standby mode, “H”: on
	27	SPEAKER	I	Protect on/off detection signal input from the speaker protect circuit
		PROTECT		“L”: protect on, “H”: protect off
	28	SOFT-TEST	O	Output terminal for the software test	Not used (open)
	29	IIC CLK	I/O	Communication data reading clock signal input or transfer clock signal output with the CPU on
				the HTC-NX1
	30	IIC DATA	I/O	Communication data bus with the CPU on the HTC-NX1
	31	TXD1	O	Not used (open)
	32	RXD1	I	Not used (fixed at “L”)
	33	CLK1	I	Not used (fixed at “L”)
	34	RTS1	O	Not used (open)
	35	LCD DATA	O	Serial data output to the liquid crystal display unit (LCD601)
	36	RXD0	I	Not used (fixed at “L”)
	37	LCD CLK	O	Serial data transfer clock signal output to the liquid crystal display unit (LCD601)
	38	493 LT	O	Serial data latch pulse output to the M62493FP (IC101)

	Pin No.	Pin Name	I/O		Description
	39	CLOCK OUT	O	Output terminal for the clock signal check Not used (open)
	40	VC L+R/L–R	O	Virtual cinema L+R/L–R selection signal output terminal				Not used (open)
	41	XHOLD	I	Not used (fixed at “L”)
	42	LCD SW	O	Liquid crystal display on/off selection signal output terminal					“L”: on, “H”: off
				Not used (open)
	43	STBY RELAY	O	Main power on/off control signal output terminal		“L”: standby mode, “H”: power on
				(Used for the US, Canadian, AEP and UK models only)
	44	BASS FREQ	O	Sync bass frequency normal/high selection signal output to the M62493FP (IC101)
				“L”: sync bass off (normal), “H”: sync bass high		Not used (open)
	45	OPT SEL	O	Not used (open)
	46	XWR	I	Not used (fixed at “H”)
	47	493 DATA	O	Serial data output to the M62493FP (IC101)
	48	493 CLK	O	Serial data transfer clock signal output to the M62493FP (IC101)
	49	ST MUTE	O	Tuner muting control signal output to the tuner pack			“H”: muting on
	50	STEREO	I	FM stereo detection signal input from the tuner pack			“L”: stereo
	51	TUNED	I	Tuning detection signal input from the tuner pack		“L”: tuned
	52	ST CE	O	PLL chip enable signal output to the tuner pack
	53	ST DOUT	O	PLL serial data output to the tuner pack
	54	ST DIN	I	PLL serial data input from the tuner pack
	55	ST CLK	O	PLL serial data transfer clock signal output to the tuner pack
	56	VC BYPASS	O	Virtual cinema bypass control signal output terminal			Not used (open)
	57	PHONES	I	Connection detect signal input of the headphone jack (J701)
		DETECT		“L”: no connected, “H”: headphone connected
	58	LCD LAT	O	Serial data latch pulse output to the liquid crystal display unit (LCD601)
	59	LCD A0	O	Address signal output to the liquid crystal display unit (LCD601)
	60	LCD RESET	O	Reset signal output to the liquid crystal display unit (LCD601)					“L”: reset
	61	NC	O	Not used (open)
	62	VCC	—	Power supply terminal (+5V)
	63	NC	O	Not used (open)
	64	VSS	—	Ground terminal
	65 to 68	NC	O	Not used (open)
	69	JOG B	I	Jog dial pulse input from the rotary encoder (S652 JOG) (B phase input)
	70	JOG A	I	Jog dial pulse input from the rotary encoder (S652 JOG) (A phase input)
	71	VOL B	I	Jog dial pulse input from the rotary encoder (S651 VOLUME) (B phase input)
	72	VOL A	I	Jog dial pulse input from the rotary encoder (S651 VOLUME) (A phase input)
	73 to 78	NC	O	Not used (open)
	79	LED FUNCTION	O	LED drive signal output of the key illumination indicator (D643 to D648) “H”: LED on
	80	LED POWER	O	LED drive signal output of the I/1 indicator (D638)			“H”: LED on
	81	LED TIMER	O	LED drive signal output of the TIMER indicator (D637)				“H”: LED on
				(Used for the US, Canadian, AEP and UK models only)
	82	LED LCD	O	LED drive signal output of the liquid crystal display back light indicator (D639 to D642)
				“H”: LED on
	83	LED ENTER	O	LED drive signal output of the ENTER indicator (D636)				“H”: LED on
	84	LED JOG	O	LED drive signal output terminal	Not used (open)
	85	LED CINEMA	O	LED drive signal output terminal	Not used (open)
	86	LED DOLBY	O	LED drive signal output of the PRO LOGIC indicator (D633)					“H”: LED on
				(Used for the STR-NX3 only)

24 24

	Pin No.	Pin Name	I/O	Description
	87	LED 5.1CH	O	LED drive signal output of the DVD 5.1CH indicator (D632)	“H”: LED on
				(Used for the STR-NX3 only)
	88	LED GROOVE	O	LED drive signal output of the GROOVE indicator (D631)	“H”: LED on
	89	BPF 1	I	Spectrum analyzer drive (low frequency) signal input from the spectrum analyzer band-pass filter
				(IC401) (for 100 Hz)
	90	BPF 2	I	Spectrum analyzer drive (low and middle frequency) signal input from the spectrum analyzer
				band-pass filter (IC401) (for 400 Hz)
	91	BPF 3	I	Spectrum analyzer drive (middle and high frequency) signal input from the spectrum analyzer
				band-pass filter (IC401) (for 2 kHz)
	92	BPF 4	I	Spectrum analyzer drive (high frequency) signal input from the spectrum analyzer band-pass filter
				(IC401) (for 6 kHz)
				Key input terminal (A/D input)
	93	KEY1	I	S615 to S617, S619 to S624 (TUNER BAND, STEREO/MONO, TUNER MEMORY,
				GROOVE, + M, – m, ENTER, DVD 5.1CH, PRO LOGIC) keys input
				(S623 DVD 5.1CH, S624 PRO LOGIC keys: used for the STR-NX3 only)
	94	KEY0	I	Key input terminal (A/D input)
				S601 to S614 (I/1, DISPLAY, POWER SAVE/DEMO (STANDBY), VIDEO/DVD, MD, TAPE,
				CD, TUNER, DSB, DBFB, PLAY MODE, REPEAT, EDIT, FILE SELECT) keys input
	95	MODEL-IN	I	Destination setting terminal
	96	AVSS	—	Ground terminal (for A/D conversion)
	97	SPEC-IN	I	Setting terminal for the version
	98	VREF	I	Reference voltage (+5V) input terminal (for A/D conversion)
	99	AVCC	—	Power supply terminal (+5V) (for A/D conversion)
	100	POWER	O	Power on/off control signal output terminal “L”: standby mode, “H”: power on

25

SECTION 6

EXPLODED VIEWS

NOTE:

•-XX and -X mean standardized parts, so they may have some difference from the original one.

•Color Indication of Appearance Parts

Example:

KNOB, BALANCE (WHITE) . . . (RED)

−	−
Parts Color	Cabinet's Color

•Items marked “*” are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items.

•The mechanical parts with no reference number in the exploded views are not supplied.

•Hardware (# mark) list is given in the last of the electrical parts list.

• Abbreviation
AUS : Australian model		MY	: Malaysia model
CND : Canadian model		SP	: Singapore model
JE	: Tourist model	TH	: Thai model
KR	: Korean model
(1)	GENERAL SECTION		M401
		2	#1
			6

1

4

1

5

Front panel ass’y

#4

The components identified by mark 0or dotted line with mark 0are critical for safety.

Replace only with part number specified.

Les composants identifiés par une marque 0sont critiquens pour la sécurité.

Ne les remplacer que par une pièce portant le numéro spécifié.

#1

#1

#1

#1

#1

3

Ref. No.	Part No.	Description	Remark	Ref. No.	Part No.	Description	Remark
1	3-363-099-11	SCREW (CASE 3 TP2)		4	1-773-011-11 WIRE (FLAT TYPE) (15 CORE)
2	4-221-365-11	CASE				(AEP, UK, MY, SP, JE)
3	X-4952-291-1	PANEL ASSY, BACK (NX1: AEP, UK, KR)		5	4-965-822-01 FOOT
3	X-4952-292-1	PANEL ASSY, BACK (NX1: US, CND)		6	1-233-545-11 TUNER PACK (FM/AM) (NX1: TH, KR/NX3: KR,
3	X-4952-293-1	PANEL ASSY, BACK (NX1: MY, SP, JE)					AUS)
				6	1-233-546-11 TUNER PACK (FM/MW/SW) (MY, SP)
3	X-4952-294-1	PANEL ASSY, BACK (NX3: AEP, UK)		6	1-693-443-11 TUNER PACK (FM/AM) (AEP, UK)
3	X-4952-295-1	PANEL ASSY, BACK (NX3: US, CND)
3	X-4952-296-1	PANEL ASSY, BACK (NX3: MY, SP)		6	1-693-445-11	TUNER PACK (FM/AM) (US, CND)
3	X-4952-355-1	PANEL ASSY, BACK (NX1: TH, KR)		6	1-693-465-11	TUNER PACK (FM/MW/SW) (NX1: JE)
3	X-4952-356-1	PANEL ASSY, BACK (NX3: AUS, KR)		M401	1-763-117-11	FAN, DC
4	1-751-688-11	WIRE (FLAT TYPE) (13 CORE)
		(NX1: US, CND, TH, KR/NX3: US, CND, KR, AUS)

26

(2)FRONT PANEL SECTION

53

56

55 58

not supplied

57

54

supplied with S652

52

supplied with S651

60

70

LCD601

61

	59	70
		69
		65
#1		68

62

63

not supplied

67

66

not supplied

68

64

51

Ref. No.	Part No.	Description	Remark	Ref. No.	Part No.	Description	Remark
51	X-4951-814-1	KNOB (VOL) ASSY		60	4-221-369-01	HOLDER
52	X-4951-831-1	JOG ASSY, KNOB		61	1-674-798-11	BACK LIGHT BOARD
53	X-4951-812-1	PANEL ASSY, FRONT (NX1: AEP, UK)		62	1-769-908-11	WIRE (FLAT TYPE) (9 CORE)
53	X-4951-815-1	PANEL ASSY, FRONT (NX1: E, JE)		* 63	1-675-197-11	R BOARD
53	X-4951-816-1	PANEL ASSY, FRONT (NX3: E, AUS)		64	1-773-213-11	WIRE (FLAT TYPE) (25 CORE)
53	X-4951-817-1	PANEL ASSY, FRONT (NX3: AEP, UK)		65	A-4426-226-A	PANEL BOARD, COMPLETE (NX1: US, CND,
53	X-4951-972-1 PANEL ASSY, FRONT (NX1: US, CND)						AEP, UK)
53	X-4951-973-1	PANEL ASSY, FRONT (NX3: US, CND)		65	A-4426-249-A	PANEL BOARD, COMPLETE
54	4-221-378-01 RING					(NX1: MY, SP, KR, JE)
55	4-221-380-01	PANEL (ST) (NX1: US, CND, AEP, UK)		65	A-4426-258-A	PANEL BOARD, COMPLETE (NX3: US, CND,
							AEP, UK)
55	4-221-380-11	PANEL (ST) (NX1: E, JE)		65	A-4426-275-A	PANEL BOARD, COMPLETE (NX3: E, AUS)
55	4-221-380-21	PANEL (ST) (NX3: US, CND, AEP, UK)		65	A-4426-927-A	PANEL BOARD, COMPLETE (NX1: TH)
55	4-221-380-31 PANEL (ST) (NX3: E, AUS)
56	4-224-207-01	TAPE (WINDOW STR), ADHESIVE		66	4-221-363-01	KNOB, MICROPHONE
57	4-951-620-01	SCREW (2.6X8), +BVTP		67	1-769-886-11	WIRE (FLAT TYPE) (7 CORE)
				68	4-951-620-01	SCREW (2.6X8), +BVTP
58	4-221-377-01	PLATE (TA-HL), ORNAMENTAL (NX1)		69	1-784-731-11	CONNECTOR, FFC 9P
58	4-221-377-11	PLATE (TA-HL), ORNAMENTAL (NX3)		70	4-951-620-01	SCREW (2.6X8), +BVTP
59	4-221-370-01	SHEET, DIFFUSION
				LCD601	1-803-738-11	LIQUID CRYSTAL DISPLAY UNIT

27

(3)CHASSIS SECTION

NX3

not supplied

US, CND, AEP, UK

108

		#2
	not	#6
#3	supplied	#5
	#5
#3
101		#6
	#5
		103
TR951	not
	supplied
	#5	102
	#2

106

105 A

not supplied

#6

#1

109

	JE	MY, SP	UK	US, CND
	104			104
		104
A	107	107	107	104
	TH, JE	AEP, UK, E		AUS

28