Sony STRNX-5-MD Service manual
STR-NX5MD
g
SERVICE MANUAL
STR-NX5MD is the
Tuner and Amplifier
Section in DHC-NX5MD.
SPECIFICATIONS
Amplifier section
European model
DIN power output (rated) 80 + 80 watts
Continuous RMS power output (reference)
Music power output (reference)
Other models
DIN power output (rated) 90 + 90 watts
Continuous RMS power output (reference)
Inputs
VIDEO IN: voltage 250 mV
(phono jacks) impedance 47 kilohms
TAPE IN: voltage 250 mV
(phono jacks) impedance 47 kilohms
Outputs
TAPE OUT: voltage 250 mV
(phono jacks) impedance 1 kilohms
PHONES: accepts headphones of 8 ohms or
(stereo mini jack) more
FRONT SPEAKER: accepts impedance of 6 to 16 ohms
REAR SPEAKER: accepts impedance of 16 ohms
SUPER WOOFER: volta
(6 ohms at 1 kHz, DIN)
100 + 100 watts
(6 ohms at 1 kHz, 10% THD)
160 + 160 watts
(6 ohms at 1 kHz, 10% THD)
(6 ohms at 1 kHz, DIN)
110 + 110 watts
(6 ohms at 1 kHz, 10% THD)
e 1 V, impedance 1 kilohms
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range
Tourist model: 76.0 – 108.0 MHz
Other models: 87.5 – 108.0 MHz
Aerial FM lead aerial
Aerial terminals 75 ohm unbalanced
Intermediate frequency 10.7 MHz
AM tuner section
Tuning range
European models: 531 – 1,602 kHz
(with the interval set at 9 kHz)
Other models: 531 – 1,602 kHz
(with the interval set at 9 kHz)
530 – 1,710 kHz
(with the interval set at 10 kHz)
Aerial AM loop aerial
Aerial terminals External aerial terminal
Intermediate frequency 450 kHz
AEP Model
UK Model
E Model
General
Power requirements
European models: 230 V AC, 50/60 Hz
Other models: 120 V, 220 V or 230 – 240 V AC,
Power consumption
European models: 190 watts
Other models: 220 watts
Dimensions (w/h/d) Approx. 225 × 202 × 356 mm
Mass
European models: Approx. 7.8 kg
Other models: Approx. 7.6 kg
Supplied accessories: AM loop aerial (1)
Design and specifications are subject to change
without notice.
50/60 Hz Adjustable with voltage
selector
Remote Commander (1)
Batteries (2)
FM lead aerial (1)
Speaker cords (2)
Front speaker pads (8)
TUNER/AMPLIFIER
1
• MODEL IDENTIFICATION
– Rear Panel –
PART No.
MODEL PART No.
AEP, UK, G, AED and CIS models 4-221-391-8[]
Malaysia and Singapore models 4-221-391-9[]
• Abbreviation
G : German model
AED : North European model
TABLE OF CONTENTS
1. GENERAL .......................................................................... 3
2. DISASSEMBLY
2-1. Case ....................................................................................... 5
2-2. Front Panel Assy ................................................................... 5
2-3. Back Panel Assy .................................................................... 6
2-4. Main Board ........................................................................... 6
3. TEST MODE ........................................................................ 7
4. DIAGRAMS
4-1. Notes for Printed Wiring Boards and Schematic Diagrams.. 9
4-2. Schematic Diagram – Main Board (1/3) – .......................... 10
4-3. Schematic Diagram – Main Board (2/3) – .......................... 11
4-4. Schematic Diagram – Main Board (3/3) – .......................... 12
4-5. Printed Wiring Board – Main Board – ................................ 13
4-6. Printed Wiring Board – PA Board – .................................... 14
4-7. Schematic Diagram – PA Board – ...................................... 15
4-8. Printed Wiring Board – Panel Section – ............................. 16
4-9. Schematic Diagram – Panel Section – ................................ 17
4-10. Printed Wiring Board – Transformer Section – ................. 18
4-11. Schematic Diagram – Transformer Section – ................... 19
4-12. IC Pin Function Description ............................................. 20
5. EXPLODED VIEW
5-1. General Section ................................................................... 22
5-2. Front Panel Section ............................................................. 23
5-3. Chassis Section ................................................................... 24
6. ELECTRICAL PARTS LIST ........................................ 25
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
• LOCATION OF CONTROLS
1 2 3
5 6 7 8 9 0
– Front Panel –
4
3
2
1
wh
wg
wf
SECTION 1
GENERAL
1 ?/1 (Power) button and indicator
2 CD/TUNER NAME button
qa
qs
qd
qf
qg
qh
qkqlwswd w;wa
qj
3 DISPLAY button
4 TIMER indicator
(AEP, UK, German, AED and CIS models)
5 VIDEO button
6 TAPE button
7 MD button
8 CD button
9 TUNER button
q; Display window
qa TUNER BAND button
qs STEREO/MONO button
qd TUNER MEMORY button
qf DBFB button
qg SURROUND button
qh GROOVE button and indicator
qj VOLUME knob
qk PLAY MODE button
ql REPEAT/PTY button
w; + M button
wa ENTER button and indicator
ws Remote sensor
wd PHONES jack
wf Jog dial
wg – m button
wh POWER SAVE/DEMO (STANDBY) button
wj FILE SELECT button
– Rear Panel –
0
9
8
6 57
Photo: AEP model
4
1 SYSTEM CONTROL terminals
2 AM ANTENNA terminals
3 FM ANTENNA terminal
4 VOLTAGE SELECTOR switch
(Malaysia and Singapore models)
5 REAR SPEAKER terminals
6 CENTER SPEAKER terminals
7 SUPER WOOFER OUT jack
8 MD OUT jacks
9 MD IN jacks
q; VIDEO (AUDIO) jacks
• Abbreviation
AED : North European model
3
Step 2: Setting the time
You must set the time beforehand to use the timer
functions.
The clock is on a 24-hour system for the European
model, and a 12-hour system for other models.
The 24-hour system is used for illustration
purposes.
3,5 2,4
1
This section is extracted from
instruction manual.
3
Press ENTER.
The minute indication flashes.
4
Press V or v to set the minute.
5
Press ENTER.
The clock starts.
Tips
• If you’ve made a mistake, start over from step 1.
• Setting the time deactivates the demo mode.
If you want to display the demo mode, press
DISPLAY (European model) or DEMO
(STANDBY) (other models) when the power is off.
To change the time
The previous explanation shows you how to set
the time while the power is off. To change the
time while the power is on, do the following:
1 Press CLOCK/TIMER SET.
2 Press V or v to select the SET CLOCK.
3 Press ENTER.
4 Perform steps 2 through 5 above.
Note
The clock settings are cancelled when you disconnect
the mains lead or if a power failure occurs.
Getting Started
1
Press CLOCK/TIMER SET.
The hour indication flashes.
2
Press V or v to set the hour.
7
4
SECTION 2
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
2-1. CASE
3 case
1 two screws
(case 3 TP2)
2 two screws
(BVTP3 × 10)
1 two screws
(case 3 TP2)
2-2. FRONT PANEL ASSY
4 front panel assy
1 flat cable (7 core)
(CN132)
2 flat cable (25 core)
(CN131)
3 two screws
(BVTT3 × 6)
5
2-3. BACK PANEL ASSY
)
3 six screws
(BVTP3 × 10)
4 back panel assy
2 connector
(CN173)
1 flat cable (13 core)
(CN1)
2-4. MAIN BOARD
3 four screws
(BVTP3 × 10)
2 connector (CN111)
1 connector
(CN181)
3 two screws
(BVTP3 × 10)
4 connector (CN152
5 main board
6
SECTION 3
TEST MODE
[CD Delivery Mode]
• 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]
• 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
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] 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]
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]
• 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
3. Press three buttons of [ENTER] , [POWER SAVE/DEMO
(
STANDBY) , 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
[CD] button to select the function “CD”.
releasing from this mode. Otherwise, a disc will not be unloaded.
• Do not run the sled motor excessively, otherwise the gear can
be chipped.
7
[Aging Mode]
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/PTY] button to “REPEAT” off.
4. Press the [CD] button to select the function “CD”.
5. Press three buttons of [ENTER] , [POWER SAVE/DEMO
(
STANDBY) , 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”)
• Display at an error occurred
1) Display of the error count
(1) Press three buttons of [ENTER] , [POWER SAVE/DEMO
(
STANDBY)
, 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##$$&&
1. Display at the Aging Mode
• Display operating state of CD section and tape deck section alternately.
• If an error occurred, stop display which that section.
2. CD Section
• Display at the aging mode is the same as the normal operation.
• The sequence during the aging mode is following as below.
Aging mode sequence (CD section) :
Open the disc1 tray
Disc5 chucking
Disc5 TOC read
Disc5 play track1 for 2 seconds
Disc5 play last track for 2 seconds
Notes:
: The number of mechanical error.(“00” is latest one)
**
(Press the [PLAY MODE] button to changes next error display)
## : Not used.
$$ : 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)
8
SECTION 4
SUB TRANS board
(AEP, UK, G, AED, CIS)
TRANS board
BACK LIGHT board
PANEL board
R board
PA board
MAIN board
TUNER pack
DIAGRAMS
4-1. 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.
• 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.
• 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 : FM
E : MD PLAY
J : CD PLAY
j : MD REC
• Abbreviation
MY : Malaysia model
SP : Singapore model
G : German model
AED : North European model
4
W or less unless otherwise
• Circuit Boards Location
• IC Block Diagram
– MAIN Board –
1
2
3
4
5
6
7
8
9
REFERENCE
REFERENCE
IC401 BA3830F
R02
R01
LINE NF
LINE IN
REC NF
REC IN
RESET C
BIAS C
GND
CURRENT
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 qa (XCOUT)
32.768 kHz
2 IC501 qd (XOUT)
3 Vp-p
2.8 Vp-p
16.025 MHz
99
STR-NX5MD
4-2. SCHEMATIC DIAGRAM – MAIN Board (1/3) – • See page 13 for Printed Wiring Board.
11
10 10
12
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