Hitachi AX-F300-WUN, AX-F300-W, AX-F300-EBS, HMD-R50, AX-F300-E Service Manual

SM0101

AXF300E AXF300EBS AXF300UC AXF300W AXF300WUN HMDR50

CD MECHANISM CDV300DW MD MECHANISM MDM-99X

CAUTIONCAUTION

CAUTION

CAUTIONCAUTION DANGERDANGER

DANGER

DANGERDANGER Invisible laser radiation when open and interlocks failed or defeated. AVOID DIRECT EXPOSURE TO BEAM.Invisible laser radiation when open and interlocks failed or defeated. AVOID DIRECT EXPOSURE TO BEAM.

Invisible laser radiation when open and interlocks failed or defeated. AVOID DIRECT EXPOSURE TO BEAM.

Invisible laser radiation when open and interlocks failed or defeated. AVOID DIRECT EXPOSURE TO BEAM.Invisible laser radiation when open and interlocks failed or defeated. AVOID DIRECT EXPOSURE TO BEAM.

GEFAHRGEFAHR

GEFAHR

GEFAHRGEFAHR Unsichtbare Laser-Strahlung wenn Interlock (Blockierung) funktionsuntüchtig oder abgeschaltet.Unsichtbare Laser-Strahlung wenn Interlock (Blockierung) funktionsuntüchtig oder abgeschaltet.

Unsichtbare Laser-Strahlung wenn Interlock (Blockierung) funktionsuntüchtig oder abgeschaltet.

Unsichtbare Laser-Strahlung wenn Interlock (Blockierung) funktionsuntüchtig oder abgeschaltet.Unsichtbare Laser-Strahlung wenn Interlock (Blockierung) funktionsuntüchtig oder abgeschaltet. UNMITTELBAREN KONTAKT MIT DEM STRAHL UNBEDIGT VERMEIDEN.UNMITTELBAREN KONTAKT MIT DEM STRAHL UNBEDIGT VERMEIDEN.

UNMITTELBAREN KONTAKT MIT DEM STRAHL UNBEDIGT VERMEIDEN.

UNMITTELBAREN KONTAKT MIT DEM STRAHL UNBEDIGT VERMEIDEN.UNMITTELBAREN KONTAKT MIT DEM STRAHL UNBEDIGT VERMEIDEN.

DANGERDANGER

DANGER

DANGERDANGER Faire très attention aux radiations émises par le faisceau laser invisible au défaillance du verrouillage.Faire très attention aux radiations émises par le faisceau laser invisible au défaillance du verrouillage.

Faire très attention aux radiations émises par le faisceau laser invisible au défaillance du verrouillage.

Faire très attention aux radiations émises par le faisceau laser invisible au défaillance du verrouillage.Faire très attention aux radiations émises par le faisceau laser invisible au défaillance du verrouillage. NE JAMAIS S'EXPOSER DIRECTEMENT AU FAISCEAU.NE JAMAIS S'EXPOSER DIRECTEMENT AU FAISCEAU.

NE JAMAIS S'EXPOSER DIRECTEMENT AU FAISCEAU.

NE JAMAIS S'EXPOSER DIRECTEMENT AU FAISCEAU.NE JAMAIS S'EXPOSER DIRECTEMENT AU FAISCEAU.

VARNINGVARNING

VARNING

VARNINGVARNING När apparaten öppnats och skyddsanordningen felar eller satts ur funktion förekommer osynlig laserstrålning.När apparaten öppnats och skyddsanordningen felar eller satts ur funktion förekommer osynlig laserstrålning.

När apparaten öppnats och skyddsanordningen felar eller satts ur funktion förekommer osynlig laserstrålning.

När apparaten öppnats och skyddsanordningen felar eller satts ur funktion förekommer osynlig laserstrålning.När apparaten öppnats och skyddsanordningen felar eller satts ur funktion förekommer osynlig laserstrålning. UNDVIK DIREKT BESTRÅLNING.UNDVIK DIREKT BESTRÅLNING.

UNDVIK DIREKT BESTRÅLNING.

UNDVIK DIREKT BESTRÅLNING.UNDVIK DIREKT BESTRÅLNING.

ADVARSELADVARSEL

ADVARSEL

ADVARSELADVARSEL Ñår apparatet åbnes og beskyttelsesanordningen ikke virker eller sættes un af funktion, forekommer der usynlig laserstråling.Ñår apparatet åbnes og beskyttelsesanordningen ikke virker eller sættes un af funktion, forekommer der usynlig laserstråling.

Ñår apparatet åbnes og beskyttelsesanordningen ikke virker eller sættes un af funktion, forekommer der usynlig laserstråling.

Ñår apparatet åbnes og beskyttelsesanordningen ikke virker eller sættes un af funktion, forekommer der usynlig laserstråling.Ñår apparatet åbnes og beskyttelsesanordningen ikke virker eller sættes un af funktion, forekommer der usynlig laserstråling. UNDGÅ DIREKTE BESTRÅLING.UNDGÅ DIREKTE BESTRÅLING.

UNDGÅ DIREKTE BESTRÅLING.

UNDGÅ DIREKTE BESTRÅLING.UNDGÅ DIREKTE BESTRÅLING.

ADVARSELADVARSEL

ADVARSEL

ADVARSELADVARSEL Når denne delen er apen som følge av at låsen er utkoplet eller ikke fungerer, eksisterer det usynlig laserstråling.Når denne delen er apen som følge av at låsen er utkoplet eller ikke fungerer, eksisterer det usynlig laserstråling.

Når denne delen er apen som følge av at låsen er utkoplet eller ikke fungerer, eksisterer det usynlig laserstråling.

Når denne delen er apen som følge av at låsen er utkoplet eller ikke fungerer, eksisterer det usynlig laserstråling.Når denne delen er apen som følge av at låsen er utkoplet eller ikke fungerer, eksisterer det usynlig laserstråling. UNNGÅ Å BLI UTSATT FOR DIREKTE BESTRÅLING!UNNGÅ Å BLI UTSATT FOR DIREKTE BESTRÅLING!

UNNGÅ Å BLI UTSATT FOR DIREKTE BESTRÅLING!

UNNGÅ Å BLI UTSATT FOR DIREKTE BESTRÅLING!UNNGÅ Å BLI UTSATT FOR DIREKTE BESTRÅLING!

VARIOITSVARIOITS

VARIOITS

VARIOITSVARIOITS Laite lähettää näkymätöntä lasersäteilyä, kun se avataan ja kun sisäiset turvalukot eivät toimi.Laite lähettää näkymätöntä lasersäteilyä, kun se avataan ja kun sisäiset turvalukot eivät toimi.

Laite lähettää näkymätöntä lasersäteilyä, kun se avataan ja kun sisäiset turvalukot eivät toimi.

Laite lähettää näkymätöntä lasersäteilyä, kun se avataan ja kun sisäiset turvalukot eivät toimi.Laite lähettää näkymätöntä lasersäteilyä, kun se avataan ja kun sisäiset turvalukot eivät toimi. VARO JOUTUMASTA ALTTIIKSI SÄTEILYLLE.VARO JOUTUMASTA ALTTIIKSI SÄTEILYLLE.

VARO JOUTUMASTA ALTTIIKSI SÄTEILYLLE.

VARO JOUTUMASTA ALTTIIKSI SÄTEILYLLE.VARO JOUTUMASTA ALTTIIKSI SÄTEILYLLE.

CONTENTSCONTENTS

CONTENTS

CONTENTSCONTENTS

SPECIFICATIONS .....................................................................................................................................................3

SERVICE POINTS .....................................................................................................................................................4

ADJUSTMENTS ......................................................................................................................................................... 10

WIRING DIAGRAMS.................................................................................................................................................. 11

PRINTED WIRING BOARDS ....................................................................................................................................14

BLOCK DIAGRAM .....................................................................................................................................................25

CIRCUIT DIAGRAM...................................................................................................................................................29

EXPLODED VIEW...................................................................................................................................................... 53

REPLACEMENT PARTS LIST .................................................................................................................................. 56

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

MINI COMPONENT HI-FI SYSTEMMINI COMPONENT HI-FI SYSTEM

MINI COMPONENT HI-FI SYSTEM

MINI COMPONENT HI-FI SYSTEMMINI COMPONENT HI-FI SYSTEM

September 2000September 2000

September 2000

September 2000September 2000

HITHIT

HIT

HITHIT

CHI CONSUMER PRCHI CONSUMER PR

CHI CONSUMER PR

CHI CONSUMER PRCHI CONSUMER PR

ODUCTS (S)ODUCTS (S)

ODUCTS (S)

ODUCTS (S)ODUCTS (S)

AX-F300

Check that exposed parts are acceptably insulated from the supply circuit before returning the repaired instrument to the customer.

••

Checking methodChecking method

•

Checking method

••

Checking methodChecking method

Measure the resistance value between the both poles of attachment cup (Power supply plug) and the exposed parts (Parts such as Knob, Cover, etc. where the customer is easy to touch.) and check that the resistance value is 500 kohms or more.

Insulation tester (DC 500V)

SAFETY PRECAUTIONSSAFETY PRECAUTIONS

SAFETY PRECAUTIONS

SAFETY PRECAUTIONSSAFETY PRECAUTIONS

The following precautions should be observed when servicing.

1. Since many parts in the unit have special safety-related characteristics, always use genuine Hitachi’s replacement parts. Especially critical parts in the power circuit block should not be replaced with other makers. Critical parts are marked with in the circuit diagram and printed wiring board.

2. Before returning a repaired unit to the customer, the service technician must thoroughly test the unit to ascertain that it is completely safe to operate without danger of electrical shock.

INSTRUMENT

(Exposed part)

– 2 –

SPECIFICATIONS

 AM-FM TUNER AMPLIFIER (HTA-R100)

Reception frequency band: UC (FM:87.5~108.0MHz(100kHz step) AM:520~1710kHz(10kHz step))

E,EBS (FM:87.50~108.00MHz(50kHz step) MW:522~1611kHz(9kHz step) LW:153~281kHz(1kHz step)) W (FM:87.50~108.00MHz(50kHz step) AM:522~1611kHz(9kHz step) 520~1710kHz(10kHz step)) WUN (FM:76.00~108.00MHz(50kHz step) AM:522~1629kHz(9kHz step) 520~1710kHz(10kHz step))

Rated output power: 40 W + 40 W (6W/ohms, 1kHz, T.H.D. 10%) Audio input / output jacks: CD input jacks, TAPE input/output jacks, AUX input jacks, MD input/output jacks,

PRE OUT (MONO) jack, headphones jack

Power supply: E,EBS : AC 230 V, 50 Hz

UC : AC 120 V, 60 Hz

W,WUN : AC 110~127 V, 50/60 Hz AC 220~240 V, 50/60 Hz Power consumption: 74 W (ECO-ON mode : 0.8 W) Maximum external dimensions: 210 (W) ∞ 96.5 (H) ∞ 350 (D) mm (including f eet, controls and terminals) Weight: 4.5 kg

 CD CHANGER (DA-R100)

Sampling frequency: 44.1kHz Optical source: Semiconductor Power supply: E,EBS : AC 230 V, 50 Hz

UC : AC 120 V, 60 Hz

W,WUN : AC 110~127 V, 50/60 Hz AC 220~240 V, 50/60 Hz Power consumption: 12 W Maximum external dimensions: 210 (W) ∞ 96.5 (H) ∞ 340 (D) mm (including f eet, controls and terminals) Weight: 3.2 kg

AX-F300

 SPEAKER (HS-R30)

System: 2 way BASS Reflex Speaker System Woofer: 10 cm ∞ 1 Tweeter: 5 cm ∞ 1 Impedance: 6 ohms Maximum external dimensions: 150 (W) ∞ 275 (H) ∞ 227 (D) mm Weight: 3.0 kg (1 speaker)

 TIMER

System: Digital Quartz Clock Display Format: 12-hour cycle (UC DEST) 24-hour cycle (other DEST) Timer Accuracy: Within 60 seconds at monthly rate

 REMOTE CONTROL

Remote control system: Infrared pulse Power supply: Two DC 1.5V R6P/AA batter ies Maximum external dimensions: 54 (W) ∞ 27 (H) ∞ 172.5 (D) mm Weight: 145g (including batteries)

 MINI DISC RECORDER (HMD-R50)

Type: MiniDisc digital audio system Wow & flutter: Below measurable limits (±0.001% W. peak or less) Sampling frequency: 44.1 kHz Recording method: Magnetic modulation overwriting Light source: Semiconductor Laser Power supply: E,EBS : AC 230 V, 50 Hz

UC : AC 120 V, 60 Hz

W,WUN : AC 110~127 V, 50/60 Hz AC 220~240 V, 50/60 Hz Power consumption: 14 W Maximum external dimensions: 210 (width) ∞ 96.5 (height) ∞ 320 (depth) mm (including f eet, controls and terminals) Weight: 2.6 kg

Specifications are subject to change or performance improvement without notice.

– 3 –

AX-F300

SERVICE POINTS

 AM-FM TUNER AMPLIFIER (HTA-R100)

1. Removal of Cover

(1) Remove 2 screws from both sides. (2) Remove 5 screws from the rear plate.

2. Removal of Front Panel

(1) Remove 4 screws from the bottom side of the front panel. (2) Remove 2 screws from both sides. (3) Remove screw to remove the ground wire. (E DEST ONLY). (4) Remove the connectors , , and . (5) Remove the Front Panel by releasing the pawl on both sides.

Pawl

(E DEST ONLY)

Pawl

– 4 –

3. Removal of Rear Panel

(1) Remove 9 screws from the rear panel. (2) Remove the connector .

4. Removal of Front P. W. Board

(1) Remove 2 screws and then the tone P. W. board. (2) Remove the volume knob assy, remove the nut and remove the volume P. W. board. (3) Remove 9 screws .

AX-F300

Control

Nut

5. Removal of Main P. W. Board

(1) Lift up the TU P. W. board and remove it from the main P. W. board. (2) Remove 2 screws from the top side of the main P. W. board. (3) Remove 4 screws from the bottom side of the chassis. (4) Remove the 4 P. W. board holders from the chassis via the bottom side of the chassis.

TU P. W. board

– 5 –

AX-F300

 CD CHANGER (DA-R100)

1. Removal of Cover

(1) Remove 2 screws from both sides. (2) Remove 3 screws

2. Removal of Front Panel

(1) Remove 2 screws from both sides. (2) Remove 3 screws from the bottom side of the front panel. (3) Remove the Front Panel by releasing the pawl on both sides. (4) Remove the flat cable from the main P. W. board.

from the rear panel.

Pawl

3. Removal of Rear Panel

(1) Remove 7 screws from the rear panel.

Pawl

– 6 –

4. Removal of CD Mechanical-Unit Assembly, Main P. W. Board and Motor P. W. Board

(1) Remove one each of screws and from the main P. W. board on the side. (2) Remove 2 screws from the top side of the mechanical unit. (3) Remove 2 screws from the bottom side of the chassis. (4) Remove the connectors (5) Remove the connector (6) Remove 1 screw from the top side of the P. T. cover and detach the power transformer from the chassis. (7) Remove 1 screw of the ground wire. (8) Remove the connectors , and of the motor P. W. board from the main P. W. board. (9) Remove 2 screws from the motor P. W. board. (10)Remove the solder from the four places of the soldering section of the motor. (11)Remove the connectors PG402 and 403 of the motor P. W. board.

, , and of the main P. W. board.

of the P. T. P. W. board.

AX-F300

PG402

PG403

– 7 –

AX-F300

 MINI DISC RECORDER (HMD-R50)

1. Removal of Cover

(1) Remove 2 screws from both sides. (2) Remove 6 screws

2. Removal of Front Panel

(1) Remove 2 screws from both sides. (2) Remove 4 screws from the bottom side of the front panel. (3) Remove the Front Panel by releasing the pawl on both sides. (4) Remove the flat cable from the main P. W. board.

from the rear panel.

Pawl

FLAT CABLE

3. Removal of Rear Panel

(1) Remove 7 screws from the rear panel.

Pawl

– 8 –

4. Removal of MD Mechanical-Unit Assembly

(1) Remove 4 screws . (2) Remove the flat cable from the main P. W. board.

5. Removal of Main P. W. Board

(1) Lift up the I/O P. W. board and remove if from the main P. W. board. (2) Remove 6 screws .

FLAT CABLE

AX-F300

I/O P. W. Board

– 9 –

AX-F300

ADJUSTMENTS

Measuring Instruments Necessary for Adjustments

• DC voltmeter

• Screwdrivers for adjustments

Before adjustments, perform the following setting in the receiver section (HTA-R100).

Note: Making adjustments without performing the following setting may result in damage of power transistors. (1) Power switch : OFF (2) Volume knob : MIN (3) Function switch : AUX (4) Speaker : Open (5) VR502L/R : Minimum

1. Idle Current Adjustment

(1) Connect the DC voltmeter to PG502. (Refer to the connection diagram.) (2) Turn on the power and adjust VR502L (on the left) and VR502R (on the right) so that the measured value of the voltme-

ter can be within the range of 2 ± 0.5 mV.

DC Voltmeter

VR502R VR502L

PG502

DC Voltmeter

+ –– +

PRE AMP PWB

– 10 –

WIRING DIAGRAMS

 AM-FM TUNER AMPLIFIER (HTA-R100)

AX-F300

PRE-AMP PWB

CN301

PG503

CN101A

CN502BCN501B

PG401

TONE PWB

(LUG TERMINAL)

TU PWB

CN504

SPEAKER PWB

MAIN PWB

P3A

W415

CN402

CN503 CN401

CN101B

PG301

VOLUME PWB

W101

CN505

PG003PG002

P2A

*P4A/P6A

CN505

*P9A

*10A

CN502ACN501A

PG504

CN103B

PG402

CN104B

CN104A CN103A

*P8B

PG001

P2B

W002(GRY)

W010(YEL)

W003(BLUE)

W005(ORG) W009(RED)

*P5A P3B

*P4B/

P7A

CN002 CN003

PT PWB

DISP PWB

W001

(LUG TERMINAL)

(W/WUN ONLY)

P9B P8B

P10B

P6B P7B

P5B

W004(ORG)

W007

(BRK)

W006

(BRN)

VOLTAGE SELECTOR P.W.B

CORD

AP1

– 11 –

AX-F300

 CD CHANGER (DA-R100)

(SOLDER)

3-DISC

CHANGER

AC CORD

AP1

PT PWB

PG421

VIDEO PWB

(W/WUN ONLY)

W402A

PG001

W403A

W401A

PG404

(BRN)

CN401

5P TXL CONN

5P PH CONN

PG401

W403B

W403(RED)

W402B

W402(YEL)

W401B

W401(BRN)

(W/WUN ONLY)

VIDEO MODULE

PG101

VOL-SEL PWB

(W/WUN ONLY)

PG103

PG102

6P MX CONN

8P PH CONN

7P PH CONN

2P TXL CONN

CN421

(WN/WUN ONLY)

5P MX CONN

CN452

(BRN)

PG402

PG403

CN453

PG454

(WN/WUN ONLY)

CN451

PG801

18P BTEM CONN

6P MX CONN

MOTOR PWB

W101

29P FFC CABLE

8P BTEM CONN

FL PWB

CN901

(WN/WUN ONLY)

PG802

(BLK)

MAIN PWB

PG901

(W/WUN ONLY)

(PINK)

CN404

PG452

PG453

PG451

4P TXL CONN (W/WUN ONLY)

– 12 –

 MINI DISC RECORDER (HMD-R50)

AC CORD

PG002

PT PWB

PG001

CN002-2

RED WHT

CN002-1

MAIN PWB

PG301 CN301

CN501A

B to B

I/O

AX-F300

PWB

CN101

PG101

#W201

CN701B

CN1501

MD MECHA UNIT

FL PWB

CN701A

CN401

#073 28P FFC CABLE

– 13 –

+ 28 hidden pages