Sony STR-NX1,STR-NX3 Service Manual
MICROFILM
SERVICE MANUAL
TUNER/AMPLIFIER
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
Tourist Model
SPECIFICATIONS
STR-NX1/NX3
STR-NX1/NX3 are the
Tuner and Amplifier
Section in HMC-NX1/NX3AV.
Photo: STR-NX3 E model
– Continued on next page –
2
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
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.
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 MANU AL OR IN SUPPLEMENTS PUBLISHED BY SONY.
3
SECTION 1
SERVICING NOTES
Fig. A. Using an AC voltmeter to check AC leakage.
1.5 k
Ω
0.15 µF
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
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 A C 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-63T rd 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)
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
4-221-391-2[]
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[]
• MODEL IDENTIFICATION
– Rear Panel –
PART No.
4
SECTION 2
GENERAL
• LOCATION OF CONTROLS
– Front Panel –
– Rear Panel –
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
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)
12
3
4
5
6
7
8
q; qa qs
9
7 9 qa qd qg qj
8 q;qsqfqh
1
2
3
4
5
6
qk
ql
w;
wa
ws
wd
wf wg wh wj wkwl e;
5
This section is extracted from
instruction manual.
6
CASE
FRONT PANEL ASS’Y
Note: Follow the disassembly procedure in the numerical order given.
SECTION 3
DISASSEMBLY
3
case
1
two screws
(case 3 TP2)
2
screw
(BVTP3
×
10
)
1
two screws
(case 3 TP2)
2
two screws
(BVTT3 × 6)
3
claw
3
claw
4
front panel ass’y
1
flat wire
(CN132)
1
flat wire
(CN131)
7
BACK PANEL ASS’Y
MAIN BOARD
3
four screws
(BVTP3
×
10)
3
seven screws
(BVTP3
×
10)
4
claw
4
claw
5
back panel ass’y
2
connector
(CN173)
1
flat wire (CN1
)
2
two screws
(BVTP3
×
10)
1
connector (CN111)
1
two connectors
(CN161, 181)
3
connector (CN152)
4
main board
8
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 [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
?/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 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
?/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.
9
[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 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
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
10
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.
1111
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.
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.
• 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 PLAYBA CK
G : RECORD
J : CD PLAY
N : MIC INPUT
• Abbreviation
AUS : Australian model
CND : Canadian model
JE : T ourist model
KR : Korean model
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.
B
These are omitted.
CE
Q
B
These are omitted.
CE
Q
• IC Block Diagram
– MAIN Board –
IC401 BA3830F
• Waveforms
– MAIN Board –
1 IC501 q; (XCIN)
2 IC501 qd (XOUT)
F01
R02
R01
LINE NF
LINE IN
REFERENCE
CURRENT
REFERENCE
CURRENT
RESET
BAND
PASS
FILTER
DET
17
RESET
18
F02
16
F03
15
F04
14
F05
13
F06
12
REC LEVEL
11
VCC
10
4
3
2
1
+
–
REC NF
REC IN
6
RESET C
7
BIAS C
8
GND
9
5
+
–
1.4 Vp-p
32.768 kHz
3 Vp-p
16 MHz
• Circuit Boards Location
SUB TRANS board
(US, Canadian, AEP, UK)
TRANS board
BACK LIGHT board
PANEL baord
R board
PA board
MAIN board
SURROUND AMP board
(NX3)
TUNER pack
MY : Malaysia model
SP : Singapore model
TH : Thai model
1212
STR-NX1/NX3
5-2. SCHEMATIC DIAGRAM – MAIN Board (1/3) –
(Page 13)
(Page
14)
(Page
17)
(Page
19)
1313
STR-NX1/NX3
5-3. SCHEMATIC DIAGRAM – MAIN Board (2/3) – • See page 11 for Waveforms.
(Page 23)
(Page 12)
(Page 14)
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