Sony MHC-NX1, MHC-NX3AV Service Manual
MHC-NX1/NX3AV
HCD-NX1/HCR-NX3
SERVICE MANUAL
• MHC-NX1/NX3AV is composed of following models.
As for the service manual, it is issued for each component model,
then, please refer to it.
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
SPEAKER SYSTEM
HCD-NX1 is composed of STR-NX1 and HTC-NX1.
HCR-NX3 is composed of STR-NX3 and HTC-NX1.
PARTS LIST
Ref. No. Part No. Description Remark
ACCESSORIES & PACKING MATERIALS
********************************
1-418-548-11 REMOTE COMMANDER (RM-SX10) (NX1)
1-418-549-11 REMOTE COMMANDER (RM-SX15) (NX3AV)
1-501-374-11 ANTENNA,LOOP
1-501-594-11 ANTENNA (FM) (AEP,UK)
1-501-659-41 ANTENNA (FM) (US,CND,E,AU,JE)
1-769-306-11 CORD,SPEAKER (1.5m) (FOR SS-NX1)
1-769-433-11 CORD,SPEAKER (1m) (FOR SS-RC100)
1-769-433-21 CORD,SPEAKER (2.5m) (FOR SS-RC100)
3-867-106-11 MANUAL,INSTRUCTION (ENGLISH)
(NX1:US,CND,AEP,UK,CIS,MY,SP,JE)
3-867-106-21 MANUAL,INSTRUCTION (FRENCH,SPANISH)
3-867-106-31 MANUAL,INSTRUCTION (GERMAN) (NX1:AEP,G)
3-867-106-41 MANUAL,INSTRUCTION
(DUTCH,ITALIAN,PORTUGUESE) (NX1:AEP)
3-867-106-51 MANUAL,INSTRUCTION
(DANISH,FINISH,SWEDISH) (NX1:AED)
3-867-106-61 MANUAL,INSTRUCTION (POLISH,RUSSIAN)
(NX1:CIS)
3-867-106-71 MANUAL,INSTRUCTION (CHINESE) (NX1:MY,SP)
3-867-106-81 MANUAL,INSTRUCTION (KORIAN) (NX1:KR,JE)
3-867-106-91 MANUAL,INSTRUCTION (PORTUGUESE)
3-867-107-11 MANUAL,INSTRUCTION (ENGLISH)
(NX3:US,CND,AEP,UK,CIS,MY,SP,AUS)
SS-RC100
(NX1:CND,AEP,MY,SP)
(NX1:JE)
US Model
Canadian Model
AEP Model
UK Model
E Model
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
Ref. No. Part No. Description Remark
3-867-107-21 MANUAL,INSTRUCTION (FRENCH,SPANISH)
(NX3:CND,AEP,MY,SP)
3-867-107-31 MANUAL,INSTRUCTION (GERMAN) (NX3:AEP,G)
3-867-107-41 MANUAL,INSTRUCTION
(DUTCH,ITALIAN,PORTUGUESE) (NX3:AEP)
3-867-107-51 MANUAL,INSTRUCTION
(DANISH,FINISH,SWEDISH) (NX3:AED)
3-867-107-61 MANUAL,INSTRUCTION (POLISH,RUSSIAN)
(NX1:CIS)
3-867-107-71 MANUAL,INSTRUCTION (CHINESE) (NX3:MY,SP)
3-867-107-81 MANUAL,INSTRUCTION (KORIAN) (NX3:KR)
3-867-339-11 MANUAL,INSTRUCTION (CZECH) (NX3,AED)
3-867-339-21 MANUAL,INSTRUCTION (HUNGARIAN)
(NX3,AED)
3-867-339-31 MANUAL,INSTRUCTION (GREEK) (NX3,AED)
3-867-339-41 MANUAL,INSTRUCTION (TURKISH) (NX3,AED)
3-867-340-11 MANUAL,INSTRUCTION (CZECH) (NX3,AED)
3-867-340-21 MANUAL,INSTRUCTION (HUNGARIAN)
(NX3,AED)
3-867-340-31 MANUAL,INSTRUCTION (GREEK) (NX3,AED)
3-867-340-41 MANUAL,INSTRUCTION (TURKISH) (NX3,AED)
3-867-790-11 MANUAL,INSTRUCTION (ENGLISH,FRENCH,
GERMAN,SWEDISH,RUSSIAN) (SS-NX1)
3-867-936-11 MANUAL,INSTRUCTION (THAI) (NX1:TH)
4-210-254-01 CUSHION (FOOT) (FOR SS-NX1)
4-981-643-21 COVER,BATTERY (FOR RM-SX10/SX15)
MICROFILM
9-928-979-11
MINI Hi-Fi COMPONENT SYSTEM
Sony Corporation
Home Audio Company
Printed in Japan ©1999.8
99H001688-1
Published by Quality Assurance Dept.
STR-NX1/NX3
SERVICE MANUAL
STR-NX1/NX3 are the
Tuner and Amplifier
Section in HMC-NX1/NX3AV.
Photo: STR-NX3 E model
SPECIFICATIONS
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
Tourist Model
MICROFILM
– Continued on next page –
TUNER/AMPLIFIER
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.
2
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS P AR 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.
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. Follo w 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
• 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
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[]
4-221-391-2[]
AC
1.5 k
0.15 µF
Fig. A. Using an AC voltmeter to check AC leakage.
Ω
Earth Ground
voltmeter
(0.75 V)
3
SECTION 2
GENERAL
• LOCATION OF CONTROLS
– Front Panel –
8 q;qsqfqh
7 9 qa qd qg qj
1
2
3
4
5
6
wf wg wh wj wkwl e;
qk
ql
w;
wa
ws
wd
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
7 FILE SELECT button
8 VIDEO/DVD button
9 EDIT button
q; MD button
qa REPEAT button
qs TAPE button
qd PLAY MODE button
qf CD button
qg DBFB button
qh TUNER button
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
– Rear Panel –
3
4
5
6
7
8
4
12
q; qa qs
9
1 AM ANTENNA terminals
2 FM ANTENNA terminal
3 SYSTEM CONTROL connector
4 VIDEO (AUDIO) IN jacks
5 MD IN jacks
6 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)
This section is extracted from
instruction manual.
5
SECTION 3
)
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
CASE
3
case
1
two screws
(case 3 TP2)
2
screw
(BVTP3
×
10
FRONT PANEL ASS’Y
4
front panel ass’y
1
flat wire
(CN132)
1
two screws
(case 3 TP2)
3
claw
1
flat wire
(CN131)
2
two screws
(BVTT3 × 6)
3
claw
6
BACK PANEL ASS’Y
)
3
seven screws
(BVTP3
4
claw
×
10)
5
back panel ass’y
2
connector
(CN173)
1
flat wire (CN1
MAIN BOARD
3
four screws
(BVTP3
×
10)
4
claw
1
two connectors
(CN161, 181)
1
connector (CN111)
2
two screws
(BVTP3
×
10)
4
main board
3
connector (CN152)
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 ov er 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 [TUNER BAND] 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
2. Press three buttons of [ENTER] , [DISPLAY] , and
?/1 button to turn the power ON.
[TUNER BAND] simultaneously.
3. “ALC OFF” is displayed, then the function which was set be-
fore 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
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
?/1 button to turn the power ON.
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.
• 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
**
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 num-
ber 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
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
Disc5 chucking
Disc5 TOC read
Disc5 play track1 for 2 seconds
Disc5 play last track for 2 seconds
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
CE
These are omitted.
Q
B
CE
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/
specified.
f
•
: internal component.
4
• 2 : nonflammable resistor.
• 5 : fusible resistor.
• C : panel designation.
Note:
The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part
number specified.
Note:
Les composants identifiés par
une marque 0 sont critiques
pour la sécurité.
Ne les remplacer que par une
pièce portant le numéro
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 V OM (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
CND : Canadian model
JE : Tourist model
KR : Korean model
W or less unless otherwise
MY : Malaysia model
SP : Singapore model
TH : Thai model
• Circuit Boards Location
BACK LIGHT board
PANEL baord
R board
TRANS board
SUB TRANS board
(US, Canadian, AEP, UK)
TUNER pack
SURROUND AMP board
(NX3)
MAIN board
PA board
• IC Block Diagram
– MAIN Board –
IC401 BA3830F
REFERENCE
1
R02
R01
LINE NF
LINE IN
REC NF
REC IN
RESET C
BIAS C
GND
2
3
4
5
6
7
8
9
CURRENT
REFERENCE
CURRENT
–
+
–
+
BAND
PASS
FILTER
RESET
DET
18
17
16
15
14
13
12
11
10
RESET
F01
F02
F03
F04
F05
F06
REC LEVEL
VCC
• Waveforms
– MAIN Board –
1 IC501 q; (XCIN)
1.4 Vp-p
32.768 kHz
2 IC501 qd (XOUT)
3 Vp-p
16 MHz
1111
STR-NX1/NX3
5-2. SCHEMATIC DIAGRAM – MAIN Board (1/3) –
(Page
19)
(Page
17)
(Page
14)
(Page 13)
1212
5-3. SCHEMATIC DIAGRAM – MAIN Board (2/3) – • See page 11 for Waveforms.
STR-NX1/NX3
(Page 12)
(Page 23)
(Page 14)
1313
STR-NX1/NX3
5-4. SCHEMATIC DIAGRAM – MAIN Board (3/3) – • See page 11 for IC Block Diagram.
(Page 12)
(Page 21)
• Semiconductor Location
Ref. No. LocationRef. No. Location
D141 A-8
D216 E-9
D501 B-2
D502 D-1
D503 D-1
D504 E-1
D505 E-1
D506 E-1
D507 F-1
D508 E-2
D510 C-1
D901 B-5
D902 A-5
D903 B-5
D904 A-4
D905 A-6
D906 A-6
D914 A-3
D915 B-3
D920 B-4
D921 B-3
D922 E-7
D923 E-7
D924 D-6
D925 B-4
D931 A-4
D932 A-4
IC101 B-9
IC201 E-9
IC401 E-5
IC501 E-3
IC502 E-1
IC901 A-2
IC921 C-2
Q112 A-8
Q113 A-8
Q114 G-6
Q162 A-9
Q163 A-9
Q164 G-6
Q191 G-11
Q281 D-8
Q282 D-7
Q291 D-8
Q411 D-5
Q421 C-3
Q431 E-6
Q432 D-6
Q461 D-5
Q501 F-1
Q502 F-1
Q503 F-1
Q901 A-6
Q902 A-6
Q903 A-6
Q904 A-3
Q905 A-3
Q906 B-3
Q907 B-4
Q921 B-3
Q923 C-3
Q924 B-3
Q951 B-6
Q952 B-6
Q953 B-6
(Page 13)
(Page 23)
(Page 23)
(Page 21)
1414
5-5. PRINTED WIRING BOARD – MAIN Board – • See page 11 for Circuit Boards Location.
(Page 22)
(Page
20)
STR-NX1/NX3
(Page 22)
(Page
20)
(Page 22)
(Page 18)
(Page 16)
1515
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)
1616
5-7. SCHEMATIC DIAGRAM – SURROUND AMP Board –
(NX3)
STR-NX1/NX3
(Page 12)
The components identified by
mark 0 or dotted line with
mark 0 are critical for safety.
Replace only with part number specified.
(Page 19)
Les composants identifiés par une
marque 0 sont critiques pour la
sécurité.
Ne les remplacer que par une pièce
portant le numéro spécifié.
1717
STR-NX1/NX3
5-8. PRINTED WIRING BOARD – PA Board – • See page 11 for Circuit Boards Location.
(Page 15)
(Page 22)
(Page
16)
• Semiconductor Location
Ref. No. LocationRef. No. Location
D802 B-5
D821 E-4
D831 C-6
D852 C-5
D871 B-10
D881 E-2
D882 H-2
D883 A-11
D884 C-11
D885 F-10
IC801 C-8
Q801 B-5
Q821 D-7
Q822 D-7
Q823 C-7
Q824 C-7
Q825 H-4
Q826 H-4
Q827 H-4
Q828 G-4
Ref. No. Location
Q829 G-4
Q830 G-4
Q831 C-7
Q851 C-5
Q881 B-10
Q882 B-9
Q883 C-9
Q884 C-9
Q885 D-9
Q886 D-9
1818
5-9. SCHEMATIC DIAGRAM – PA Board –
The components identified by
mark 0 or dotted line with
mark 0 are critical for safety.
Replace only with part number specified.
Les composants identifiés par une
marque 0 sont critiques pour la
sécurité.
Ne les remplacer que par une pièce
portant le numéro spécifié.
STR-NX1/NX3
(Page 23)
(Page 12)
(Page
17)
1919
STR-NX1/NX3
5-10. PRINTED WIRING BOARDS – PANEL Section – • See page 11 for Circuit Boards Location.
• 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
(Page 15)
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)
2020
5-11. SCHEMATIC DIAGRAM – PANEL Section –
STR-NX1/NX3
(Page 14)
(Page 14)
2121
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)
(Page 15)
(Page 18)
• 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)
2222
5-13. SCHEMATIC DIAGRAM – TRANSFORMER Section –
(Page 19)
STR-NX1/NX3
(Page 14)
(Page 13)
(Page 14)
The components identified by
mark 0 or dotted line with
mark 0 are critical for safety.
Replace only with part number specified.
Les composants identifiés par une
marque 0 sont critiques pour la
sécurité.
Ne les remplacer que par une pièce
portant le numéro spécifié.
2323
5-14. IC PIN FUNCTION DESCRIPTION
• MAIN BOARD IC501 M30622MA-A12FP (SYSTEM CONTROLLER )
Pin No. Pin Name I/O
1 L+R I
2 BPF SL I
3 F RELAY O
4 R RELAY O
5 SIRCS I
6 LINE MUTE O
7 DBFB O
8 BYTE I
9 CNVSS —
10 XCIN I
11 XCOUT O
12 RESET I
13 XOUT O
14 VSS —
15 XIN I
16 VCC —
17 NMI I
18 WAKE UP O
19 PHONES MUTE O
20 RDS INT I
21 RDS DATA I
22 AC CUT I
23 PL CLK O
24 PL DATA O
25 PL LAT O
26 STK POWER O
27
28 SOFT-TEST O
29 IIC CLK I/O
30 IIC DATA I/O
31 TXD1 O
32 RXD1 I
33 CLK1 I
34 RTS1 O
35 LCD DATA O
36 RXD0 I
37 LCD CLK O
38 493 LT O
SPEAKER
PROTECT
Spectrum analyzer drive signal input from the spectrum analyzer band-pass filter (IC401)
(for VACS, non-stop signal)
Spectrum analyzer drive (super low frequency) signal input from the spectrum analyzer band-pass
filter (IC401) (for 40 Hz)
Speaker protect relay drive signal output for the front side speaker “H”: relay on
Speaker protect relay drive signal output for the rear side speaker “H”: relay on
Remote control signal input from the remote control receiver (IC601)
Line muting on/off control signal output terminal “L”: muting on
DBFB normal/high selection signal output to the M62493FP (IC101)
“L”: DBFB high, “H”: DBFB low/off
External data bus line byte selection signal input terminal Fixed at “L” in this set
Ground terminal
Sub system clock input terminal (32.768 kHz)
Sub system clock output terminal (32.768 kHz)
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”
Main system clock output terminal (16 MHz)
Ground terminal
Main system clock input terminal (16 MHz)
Power supply terminal (+5V)
Non-maskable interrupt input terminal Fixed at “H” in this set
Wakeup control signal output to the CPU on the HTC-NX1 “H” active
Muting on/off control signal output terminal “L”: muting on Not used (open)
RDS serial data transfer clock signal input from the tuner pack
(Used for the AEP and UK models only)
RDS serial data input from the tuner pack (Used for the AEP and UK models only)
AC off detection signal input from the reset signal generator (IC502) “L”: AC cut checked
Serial data transfer clock signal output to the M62464FP (IC201)
(Used for the STR-NX3 only)
Serial data output to the M62464FP (IC201) (Used for the STR-NX3 only)
Serial data latch pulse output to the M62464FP (IC201) (Used for the STR-NX3 only)
Power amplifier on/off selection signal output terminal “L”: standby mode, “H”: on
Protect on/off detection signal input from the speaker protect circuit
I
“L”: protect on, “H”: protect off
Output terminal for the software test Not used (open)
Communication data reading clock signal input or transfer clock signal output with the CPU on
the HTC-NX1
Communication data bus with the CPU on the HTC-NX1
Not used (open)
Not used (fixed at “L”)
Not used (fixed at “L”)
Not used (open)
Serial data output to the liquid crystal display unit (LCD601)
Not used (fixed at “L”)
Serial data transfer clock signal output to the liquid crystal display unit (LCD601)
Serial data latch pulse output to the M62493FP (IC101)
Description
Pin No. Pin Name I/O
39 CLOCK OUT O
40 VC L+R/L–R O
41 XHOLD I
42 LCD SW O
43 STBY RELAY O
44 BASS FREQ O
45 OPT SEL O
46 XWR I
47 493 DATA O
48 493 CLK O
49 ST MUTE O
50 STEREO I
51 TUNED I
52 ST CE O
53 ST DOUT O
54 ST DIN I
55 ST CLK O
56 VC BYPASS O
57
58 LCD LAT O
59 LCD A0 O
60 LCD RESET O
61 NC O
62 VCC —
63 NC O
64 VSS —
65 to 68 NC O
69 JOG B I
70 JOG A I
71 VOL B I
72 VOL A I
73 to 78 NC O
79 LED FUNCTION O
80 LED POWER O
81 LED TIMER O
82 LED LCD O
83 LED ENTER O
84 LED JOG O
85 LED CINEMA O
86 LED DOLBY O
PHONES
DETECT
Description
Output terminal for the clock signal check Not used (open)
Virtual cinema L+R/L–R selection signal output terminal Not used (open)
Not used (fixed at “L”)
Liquid crystal display on/off selection signal output terminal “L”: on, “H”: off
Not used (open)
Main power on/off control signal output terminal “L”: standby mode, “H”: power on
(Used for the US, Canadian, AEP and UK models only)
Sync bass frequency normal/high selection signal output to the M62493FP (IC101)
“L”: sync bass off (normal), “H”: sync bass high Not used (open)
Not used (open)
Not used (fixed at “H”)
Serial data output to the M62493FP (IC101)
Serial data transfer clock signal output to the M62493FP (IC101)
Tuner muting control signal output to the tuner pack “H”: muting on
FM stereo detection signal input from the tuner pack “L”: stereo
Tuning detection signal input from the tuner pack “L”: tuned
PLL chip enable signal output to the tuner pack
PLL serial data output to the tuner pack
PLL serial data input from the tuner pack
PLL serial data transfer clock signal output to the tuner pack
Virtual cinema bypass control signal output terminal Not used (open)
Connection detect signal input of the headphone jack (J701)
I
“L”: no connected, “H”: headphone connected
Serial data latch pulse output to the liquid crystal display unit (LCD601)
Address signal output to the liquid crystal display unit (LCD601)
Reset signal output to the liquid crystal display unit (LCD601) “L”: reset
Not used (open)
Power supply terminal (+5V)
Not used (open)
Ground terminal
Not used (open)
Jog dial pulse input from the rotary encoder (S652 JOG) (B phase input)
Jog dial pulse input from the rotary encoder (S652 JOG) (A phase input)
Jog dial pulse input from the rotary encoder (S651 VOLUME) (B phase input)
Jog dial pulse input from the rotary encoder (S651 VOLUME) (A phase input)
Not used (open)
LED drive signal output of the key illumination indicator (D643 to D648) “H”: LED on
LED drive signal output of the I/1 indicator (D638) “H”: LED on
LED drive signal output of the TIMER indicator (D637) “H”: LED on
(Used for the US, Canadian, AEP and UK models only)
LED drive signal output of the liquid crystal display back light indicator (D639 to D642)
“H”: LED on
LED drive signal output of the ENTER indicator (D636) “H”: LED on
LED drive signal output terminal Not used (open)
LED drive signal output terminal Not used (open)
LED drive signal output of the PRO LOGIC indicator (D633) “H”: LED on
(Used for the STR-NX3 only)
2424
Pin No. Pin Name I/O
87 LED 5.1CH O
88 LED GROOVE O
89 BPF 1 I
Description
LED drive signal output of the DVD 5.1CH indicator (D632) “H”: LED on
(Used for the STR-NX3 only)
LED drive signal output of the GROOVE indicator (D631) “H”: LED on
Spectrum analyzer drive (low frequency) signal input from the spectrum analyzer band-pass filter
(IC401) (for 100 Hz)
90 BPF 2 I
91 BPF 3 I
92 BPF 4 I
93 KEY1 I
94 KEY0 I
95 MODEL-IN I
96 AVSS —
97 SPEC-IN I
98 VREF I
99 AVCC —
100 POWER O
Spectrum analyzer drive (low and middle frequency) signal input from the spectrum analyzer
band-pass filter (IC401) (for 400 Hz)
Spectrum analyzer drive (middle and high frequency) signal input from the spectrum analyzer
band-pass filter (IC401) (for 2 kHz)
Spectrum analyzer drive (high frequency) signal input from the spectrum analyzer band-pass filter
(IC401) (for 6 kHz)
Key input terminal (A/D input)
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)
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
Destination setting terminal
Ground terminal (for A/D conversion)
Setting terminal for the version
Reference voltage (+5V) input terminal (for A/D conversion)
Power supply terminal (+5V) (for A/D conversion)
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)
• Abbreviation
AUS : Australian model
CND: Canadian model
JE : Tourist model
KR : Korean model
↑↑
Parts Color Cabinet's Color
MY : Malaysia model
SP : Singapore model
TH : Thai model
(1) GENERAL SECTION
2
1
• 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.
M401
#1
6
The components identified by
mark 0 or dotted line with mark
0 are critical for safety.
Replace only with part number
specified.
Les composants identifiés par une
marque 0 sont critiquens pour la
sécurité.
Ne les remplacer que par une pièce
portant le numéro spécifié.
#1
#1
#1
#1
Front panel ass’y
#4
Ref. No. Part No. Description Remark
1 3-363-099-11 SCREW (CASE 3 TP2)
2 4-221-365-11 CASE
3 X-4952-291-1 PANEL ASSY, BACK (NX1: AEP, UK, KR)
3 X-4952-292-1 PANEL ASSY, BACK (NX1: US, CND)
3 X-4952-293-1 PANEL ASSY, BACK (NX1: MY, SP, JE)
3 X-4952-294-1 PANEL ASSY, BACK (NX3: AEP, UK)
3 X-4952-295-1 PANEL ASSY, BACK (NX3: US, CND)
3 X-4952-296-1 PANEL ASSY, BACK (NX3: MY, SP)
3 X-4952-355-1 PANEL ASSY, BACK (NX1: TH, KR)
3 X-4952-356-1 PANEL ASSY, BACK (NX3: AUS, KR)
4
#1
1
3
5
Ref. No. Part No. Description Remark
4 1-773-011-11 WIRE (FLAT TYPE) (15 CORE)
5 4-965-822-01 FOOT
6 1-233-545-11 TUNER PACK (FM/AM) (NX1: TH, KR/NX3: KR,
6 1-233-546-11 TUNER PACK (FM/MW/SW) (MY, SP)
6 1-693-443-11 TUNER PACK (FM/AM) (AEP, UK)
6 1-693-445-11 TUNER PACK (FM/AM) (US, CND)
6 1-693-465-11 TUNER PACK (FM/MW/SW) (NX1: JE)
M401 1-763-117-11 FAN, DC
(AEP, UK, MY, SP, JE)
AUS)
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
LCD601
60
70
61
supplied
with S652
57
55
54
58
56
not
supplied
not
supplied
#1
59
63
not
supplied
69
67
70
65
68
62
68
64
66
52
supplied
with S651
51
Ref. No. Part No. Description Remark
51 X-4951-814-1 KNOB (VOL) ASSY
52 X-4951-831-1 JOG ASSY, KNOB
53 X-4951-812-1 PANEL ASSY, FRONT (NX1: AEP, UK)
53 X-4951-815-1 PANEL ASSY, FRONT (NX1: E, JE)
53 X-4951-816-1 PANEL ASSY, FRONT (NX3: E, AUS)
53 X-4951-817-1 PANEL ASSY, FRONT (NX3: AEP, UK)
53 X-4951-972-1 PANEL ASSY, FRONT (NX1: US, CND)
53 X-4951-973-1 PANEL ASSY, FRONT (NX3: US, CND)
54 4-221-378-01 RING
55 4-221-380-01 PANEL (ST) (NX1: US, CND, AEP, UK)
55 4-221-380-11 PANEL (ST) (NX1: E, JE)
55 4-221-380-21 PANEL (ST) (NX3: US, CND, AEP, UK)
55 4-221-380-31 PANEL (ST) (NX3: E, AUS)
56 4-224-207-01 TAPE (WINDOW STR), ADHESIVE
57 4-951-620-01 SCREW (2.6X8), +BVTP
58 4-221-377-01 PLATE (TA-HL), ORNAMENTAL (NX1)
58 4-221-377-11 PLATE (TA-HL), ORNAMENTAL (NX3)
59 4-221-370-01 SHEET, DIFFUSION
Ref. No. Part No. Description Remark
60 4-221-369-01 HOLDER
61 1-674-798-11 BACK LIGHT BOARD
62 1-769-908-11 WIRE (FLAT TYPE) (9 CORE)
* 63 1-675-197-11 R BOARD
64 1-773-213-11 WIRE (FLAT TYPE) (25 CORE)
65 A-4426-226-A PANEL BOARD, COMPLETE (NX1: US, CND,
AEP, UK)
65 A-4426-249-A PANEL BOARD, COMPLETE
(NX1: MY, SP, KR, JE)
65 A-4426-258-A PANEL BOARD, COMPLETE (NX3: US, CND,
AEP, UK)
65 A-4426-275-A PANEL BOARD, COMPLETE (NX3: E, AUS)
65 A-4426-927-A PANEL BOARD, COMPLETE (NX1: TH)
66 4-221-363-01 KNOB, MICROPHONE
67 1-769-886-11 WIRE (FLAT TYPE) (7 CORE)
68 4-951-620-01 SCREW (2.6X8), +BVTP
69 1-784-731-11 CONNECTOR, FFC 9P
70 4-951-620-01 SCREW (2.6X8), +BVTP
LCD601 1-803-738-11 LIQUID CRYSTAL DISPLAY UNIT
27
(3) CHASSIS SECTION
US, CND, AEP, UK
108
NX3
not supplied
#2
101
TR951
#3
#3
#5
not
supplied
not supplied
#5
#2
105
#5
A
not
supplied
#6
#5
#6
103
102
106
A
104
109
JE
107
104
AEP, UK, E
MY, SP
107
#6
107
#1
US, CNDUK
104
104
AUSTH, JE
28
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