1 SERVICE MANUAL TUNER/AMPLIFIER AEP Model UK Model E Model SPECIFICATIONS STR-NX5MD STR-NX5MD is the Tuner and Amplifier Section in DHC-NX5MD. Amplifier section European model DIN power output (rated) 80 + 80 watts (6 ohms at 1 kHz, DIN) Continuous RMS power output (reference) 100 + 100 watts (6 ohms at 1 kHz, 10% THD) Music power output (reference) 160 + 160 watts (6 ohms at 1 kHz, 10% THD) Other models DIN power output (rated) 90 + 90 watts (6 ohms at 1 kHz, DIN) Continuous RMS power output (reference) 110 + 110 watts (6 ohms at 1 kHz, 10% THD) 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: voltage 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 General Power requirements European models: 230 V AC, 50/60 Hz Other models: 120 V, 220 V or 230 – 240 V AC, 50/60 Hz Adjustable with voltage selector 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) Remote Commander (1) Batteries (2) FM lead aerial (1) Speaker cords (2) Front speaker pads (8) Design and specifications are subject to change without notice.
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1
SERVICE MANUAL
TUNER/AMPLIFIER
AEP ModelUK Model
E Model
SPECIFICATIONS
STR-NX5MD
STR-NX5MD is theTuner and AmplifierSection in DHC-NX5MD.
Amplifier section
European modelDIN power output (rated) 80 + 80 watts
(6 ohms at 1 kHz, DIN)Continuous RMS power output (reference)
100 + 100 watts(6 ohms at 1 kHz, 10% THD)
Music power output (reference)160 + 160 watts(6 ohms at 1 kHz, 10% THD)
Other modelsDIN power output (rated) 90 + 90 watts
(6 ohms at 1 kHz, DIN)Continuous RMS power output (reference)
110 + 110 watts(6 ohms at 1 kHz, 10% THD)
InputsVIDEO IN: voltage 250 mV(phono jacks) impedance 47 kilohmsTAPE IN: voltage 250 mV(phono jacks) impedance 47 kilohmsOutputsTAPE OUT: voltage 250 mV(phono jacks) impedance 1 kilohmsPHONES: accepts headphones of 8 ohms or(stereo mini jack) moreFRONT SPEAKER: accepts impedance of 6 to 16 ohmsREAR SPEAKER: accepts impedance of 16 ohmsSUPER WOOFER: voltage 1 V, impedance 1 kilohms
FM tuner sectionTuning rangeTourist model: 76.0 – 108.0 MHzOther models: 87.5 – 108.0 MHzAerial FM lead aerialAerial terminals 75 ohm unbalancedIntermediate frequency 10.7 MHz
AM tuner sectionTuning rangeEuropean 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 aerialAerial terminals External aerial terminalIntermediate frequency 450 kHz
GeneralPower requirementsEuropean models: 230 V AC, 50/60 HzOther models: 120 V, 220 V or 230 – 240 V AC,
50/60 Hz Adjustable with voltageselector
Power consumptionEuropean models: 190 wattsOther models: 220 watts
Dimensions (w/h/d) Approx. 225 × 202 × 356 mm
MassEuropean models: Approx. 7.8 kgOther models: Approx. 7.6 kg
Supplied accessories: AM loop aerial (1)Remote Commander (1)Batteries (2)FM lead aerial (1)Speaker cords (2)Front speaker pads (8)
Design and specifications are subject to changewithout notice.
2
TABLE OF CONTENTS
1. GENERAL .......................................................................... 3
2. DISASSEMBLY2-1. Case ....................................................................................... 52-2. Front Panel Assy ................................................................... 52-3. Back Panel Assy .................................................................... 62-4. Main Board ........................................................................... 6
3. TEST MODE ........................................................................ 7
5. EXPLODED VIEW5-1. General Section ................................................................... 225-2. Front Panel Section ............................................................. 235-3. Chassis Section ................................................................... 24
6. ELECTRICAL PARTS LIST ........................................ 25
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTEDLINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMSAND IN THE PARTS LIST ARE CRITICAL TO SAFEOPERATION. REPLACE THESE COMPONENTS WITHSONY PARTS WHOSE PART NUMBERS APPEAR ASSHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-LISHED BY SONY.
MODEL PART No.
AEP, UK, G, AED and CIS models 4-221-391-8[]
Malaysia and Singapore models 4-221-391-9[]
• MODEL IDENTIFICATION– Rear Panel –
PART No.
• AbbreviationG : German modelAED : North European model
3
SECTION 1GENERAL
• LOCATION OF CONTROLS– Front Panel –
– Rear Panel –
1 ?/1 (Power) button and indicator
2 CD/TUNER NAME button
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
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
9
8
0
1 2 3
4
6 57
1
2
wh
wf
wg
4 qs
5 6 7 8 90
3
qa
qd
qh
qjqkqlwswd w;wa
qf
qg
Photo: AEP model
• AbbreviationAED : North European model
4
This section is extracted frominstruction manual.
7
Ge
tting
Sta
rted
Step 2: Setting the timeYou must set the time beforehand to use the timerfunctions.The clock is on a 24-hour system for the Europeanmodel, and a 12-hour system for other models.The 24-hour system is used for illustrationpurposes.
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, pressDISPLAY (European model) or DEMO(STANDBY) (other models) when the power is off.
To change the timeThe previous explanation shows you how to setthe time while the power is off. To change thetime 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.
NoteThe clock settings are cancelled when you disconnectthe mains lead or if a power failure occurs.
5
2-1. CASE
2-2. FRONT PANEL ASSY
Note: Follow the disassembly procedure in the numerical order given.
SECTION 2DISASSEMBLY
3 case
1 two screws(case 3 TP2)
2 two screws(BVTP3 × 10)
1 two screws(case 3 TP2)
3 two screws(BVTT3 × 6)
4 front panel assy
1 flat cable (7 core)(CN132)
2 flat cable (25 core)(CN131)
6
2-3. BACK PANEL ASSY
2-4. MAIN BOARD
3 four screws(BVTP3 × 10)
3 six screws(BVTP3 × 10)
4 back panel assy
2 connector(CN173)
1 flat cable (13 core)(CN1)
3 two screws(BVTP3 × 10)
2 connector (CN111)1 connector
(CN181)
4 connector (CN152)
5 main board
7
SECTION 3TEST 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 customerafter 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 “MW9 k STEP” or “MW 10 k STEP”, and thus the tuning intervalis 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 returningthe 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 Ver-sion 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 liq-uid 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 “K0 J0 V0”. Each time a button is pressed, “K” value increases.However, once a button is pressed, it is no longer taken intoaccount.“J” value increases like 1, 2, 3 ... if turn the JOG dial clock-wise, or it decreases like 0, 9, 8 ... if turn the JOG dial counter-clockwise.“V” value increases like 1, 2, 3 ... if turn the [VOLUME] dialclockwise, or it decreases like 0, 9, 8 ... if turn the JOG dialcounterclockwise.
(3) Press the [TAPE] button, and the VACS level is displayed onthe liquid crystal display.
5. To release from these mode, press three buttons in the samemanner 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 powercord 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 displaychanges to “VACS ON” or “VACS OFF”, and thus the VACSON/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 therecord 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 [CD] button to select the function “CD”.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 counter-clockwise 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 whenreleasing from this mode. Otherwise, a disc will not be un-loaded.
• Do not run the sled motor excessively, otherwise the gear canbe chipped.
8
[Aging Mode]This mode can be used for operation check of CD section and tapedeck section.CD section and tape deck section work in parallel.• If an error occurred:
The aging operation stops only an error occurred sections anddisplay 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 “MCCold Reset”)
1. Display at the Aging Mode• Display operating state of CD section and tape deck section al-
ternately.• 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 occurred1) 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##$$&&
Notes:
**: The number of mechanical error.(“00” is latest one)(Press the [PLAY MODE] button to changes next error display)
## : Not used.$$ : 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-open4:Time up of EX-close.
3) Display of no disc error
Display
E**D##$$&&
Notes:
**: The number of mechanical error.(“00” is latest one)(Press the [REPEAT] button to changes next error display)
##:01:Focus error02:GFS error03:Set up error
$$: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:Stop2:Set up3:TOC read4:Access5:Play6:Pause7:Manual search (Play)8:Manual search (Pause)
9 9
SECTION 4DIAGRAMS
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.
Note on Schematic Diagram:• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolyticsand 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 produc-tion tolerances.
• Waveforms are taken with a oscilloscope.Voltage variations may be noted due to normal produc-tion tolerances.
• Circled numbers refer to waveforms.• Signal path.
F : FME : MD PLAYJ : CD PLAYj : MD REC
• AbbreviationMY : Malaysia modelSP : Singapore modelG : German modelAED : North European model
B
These are omitted.
C E
Q
B
These are omitted.
C E
Q
• IC Block Diagram– MAIN Board –
IC401 BA3830F
• Waveforms– MAIN Board –
1 IC501 qa (XCOUT)
2 IC501 qd (XOUT)
F01
R02
R01
LINE NF
LINE IN
REFERENCECURRENT
REFERENCECURRENT
RESET
BANDPASS
FILTERDET
17
RESET18
F0216F0315F0414F0513F0612
REC LEVEL11
VCC10
4
3
2
1
+–
REC NF
REC IN 6
RESET C 7BIAS C 8
GND 9
5
+–
3 Vp-p
32.768 kHz
2.8 Vp-p
16.025 MHz
• Circuit Boards Location
SUB TRANS board(AEP, UK, G, AED, CIS)
TRANS board
BACK LIGHT board
PANEL board
R boardPA board
MAIN board
TUNER pack
Note: The components identified by mark 0 or dotted linewith mark 0 are critical for safety.Replace only with part number specified.
10 10
STR-NX5MD
4-2. SCHEMATIC DIAGRAM – MAIN Board (1/3) – • See page 13 for Printed Wiring Board.
12
11
11 11
STR-NX5MD
4-3. SCHEMATIC DIAGRAM – MAIN Board (2/3) – • See page 9 for Waveforms. • See page 13 for Printed Wiring Board.
12
10
PIN FUNCTION
12 12
STR-NX5MD
4-4. SCHEMATIC DIAGRAM – MAIN Board (3/3) – • See page 9 for IC Block Diagram.
IC101 8-759-571-54 IC M62493FPIC401 8-759-083-77 IC BA3830FIC501 8-759-668-66 IC M30622MAA-A39FPIC502 8-759-635-63 IC M51943BSL-TPIC901 8-759-231-53 IC M5F7805L
0S951 1-771-291-11 SWITCH, POWER (VOLTAGE SELECTOR)(MY,SP)
< TRANSFORMER >
0T951 1-435-566-11 TRANSFORMER, POWER (AEP,UK,G,AED,CIS)0T951 1-435-567-11 TRANSFORMER, POWER (MY,SP)**************************************************************