HITACHI AXF300UC - Service Manual Immediate Download

SM0101

AXF300E

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

September 2000

MINI COMPONENT HI-FI SYSTEM

HIT

HITA

A

ACHI CONSUMER PR

CHI CONSUMER PR

CHI CONSUMER PRODUCTS (S)

ODUCTS (S)

CONTENTS

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

CAUTION

DANGER

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

GEFAHR

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

UNMITTELBAREN KONTAKT MIT DEM STRAHL UNBEDIGT VERMEIDEN.

DANGER

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

NE JAMAIS S'EXPOSER DIRECTEMENT AU FAISCEAU.

VARNING

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

UNDVIK DIREKT BESTRÅLNING.

ADVARSEL

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

UNDGÅ DIREKTE BESTRÅLING.

ADVARSEL

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!

VARIOITS

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

VARO JOUTUMASTA ALTTIIKSI SÄTEILYLLE.

MD MECHANISM MDM-99X

CD MECHANISM CDV300DW

AXF300EBS

AXF300UC

AXF300W

AXF300WUN

HMDR50

2

AX-F300

Check that exposed parts are acceptably insulated from

the supply circuit before returning the repaired instrument

to the customer.

····· Checking method

Checking 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 cus-

tomer is easy to touch.) and check that the resistance

value is 500 kohms or more.

INSTRUMENT

(Exposed part)

Insulation tester (DC 500V)

SAFETY 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.

3

AX-F300

SPECI.ICATIONS

AM-.M TUNER AMPLI.IER (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 feet, 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 feet, controls and terminals)

Weight:

3.2 kg

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 batteries

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 feet, controls and terminals)

Weight:

2.6 kg

Specifications are subject to change or performance improvement without notice.

4

AX-F300

SERVICE POINTS

AM-.M TUNER AMPLI.IER (HTA-R100)

1. Removal of Cover

(1) Remove 2 screws

from both sides.

(2) Remove 5 screws

from the rear plate.

2. Removal of .ront 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)

5

AX-F300

3. Removal of Rear Panel

(1) Remove 9 screws

from the rear panel.

(2) Remove the connector

.

4. Removal of .ront 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

.

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

Control

Nut