Fostex 6301-B Service manual

Service Manual

6301B

Personal Monitor Self-Powered

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

CAUTION:

TO PREVENT ELECTRIC SHOCK, MATCH WIDE BLADE OF PLUG TO WIDE SLOT, FULLY INSERT.

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,

DO NOT REMOVE COVER (OR BACK).

NO USER-SERVICEABLE PARTS INSIDE.

REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

The lightening flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.

“WARNING”

“TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.”

SAFETY INSTRUCTIONS

Read instructions - All the safety and operating instruc-

1. tions should be read before the appliance is operated. Retain instructions - The safety and operating instructions

2. should be retained for future reference. Heed warnings - All warnings on the appliance and in the

3. operating instructions should be adhered to. Follow instructions - All operating and use instructions

4. should be followed. Water and Moisture - The appliance should not be used

5. near water - for example, near a bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or near a swimming pool, and the like. Carts and Stands - The appliance should be used only

6. with a cart or stand that is recommended by the manufacturer.

An appliance and cart combination should be moved with care. Quick stops, excessive force, and uneven surfaces may cause the appliance and cart combination to overturn. Wall or Ceiling Mounting - The appliance should be

7. mounted to a wall or ceiling only as recommended by the manufacturer. Ventilation - The appliance should be situated so that its

8. location or position does not interfere with its proper ventilation. For example, the appliance should not be situated on a bed, sofa, rug, or similar surface that may block the ventilation openings; or, placed in a built-in installation, such as a bookcase or cabinet that may impede the flow of air through the ventilation openings.

ATTENTION:

POUR ÉVITER LES CHOCS ÉLECTRIQUES, INTRODUIRE LA LAME LA PLUS LARGE DE LA FICHE DANS LA BORNE CORRESPONDANTE DE LA PRISE ET POUSSER JUSQU' AU FOND.

The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance.

Heat - The appliance should be situated away from heat

9. sources such as radiators, heat registers, stoves, or other appliances (including amplifiers) that produce heat. Power Sources - The appliance should be connected to a

10. power supply only of the type described in the operating instructions or as marked on the appliance. Grounding or Polarization - The precautions that should

11. be taken so that the grounding or polarization means of an appliance is not defeated. Power Cord Protection - Power supply cords should be

12. routed so that they are not likely to be walked on or pinched by items placed upon or against them, paying particular attention to cords at plugs, convenience receptacles, and the point where they exit from the appliance. Cleaning - The appliance should be cleaned only as rec-

13. ommended by the manufacturer. Nonuse Periods - The power cord of the appliance should

14. be unplugged from the outlet when left unused for a long period of time. Object and Liquid Entry - Care should be taken so that

15. objects do not fall and liquids are not spilled into the enclosure through openings. Damage requiring Service - The appliance should be ser-

16. viced by qualified service personnel when:

The power supply cord or the plug has been damaged;

A.

or Objects have fallen, or liquid has been spilled into the

B.

appliance; or The appliance has been exposed to rain; or

C.

The appliance does not appear to operate normally or

D.

exhibits a marked changed in performance; or The appliance has been dropped, or the enclosure

E.

damaged.

Servicing - The user should not attempt to service the ap-

17. pliance beyond that described in the operating instructions. All other servicing should be referred to qualified service personnel.

6301B/BX/BE

TABLE OF CONTENTS

1. SPECIFICATIONS ........................................................................................ 3

2. OVERALL EXPLODED VIEW.................................................................. 4

3. PCB ASSY AND PARTS LIST................................................................. 6

4. PATTERN DRAWING.................................................................................. 8

5. CIRCUIT DIAGRAMS.................................................................................. 9

NOTES

• Adjustment procedures, parts list, pattern drawing and circuit diagrams are given in this manual to assist the service technician in maintaining the 6301B.

• For your information, this service manual complies to the 6301B with the followings are the serial number of 6301B.

USA/CND : 0260001 and onwards EUR : 0660001 and onwards UK : 0760001 and onwards JPN : 1060001 and onwards

1. SPECIFICATIONS

SPEAKER ( Internal )

Type 10cm Full Range Single Cone Impedance 4 Ω Efficiency 84 dB/W (1m)

AMPLIFIER

Normal Input Level -10dBV Output more than 10Wrms ( 8 Ω load ) Frequency Response 20 ~ 50 kHz +0dB-3dB Distortion 0.05 % or less ( at 1W output ) Residual Noise -70dBV (0.3mV) Input Sensitivity Unbalanced type : -6dBV (0.5Vrms)

Balanced type : +4dBm (1.2Vrms)

Input Impedance Unbalanced type : Higher than 20kΩ

Balanced type : Higher than 10kΩ

GENERAL

Dimensions 120 (W) × 188 (H) × 118 (D) mm Weight 3.0 kg Power supply

JPN 100 VAC, 50/60 Hz USA/CND 120 VAC, 60 Hz EUR/UK 230 VAC, 50/60 Hz

Power consumption 33 W

3

4

6301B/BX/BE

2. OVERALL EXPLODED VIEW

BTT

2

1

3

BTT 4x12 Bzn

15

4x12 Bzn

BTT 4x12 Bzn

PTP WH 3x10 Bzn

19

17

18

PTT 3x8 Ni

BTT 4x12 Bzn

PTT 4x8 Bzn

13

9

12

P 4x10 Bzn

BTT 4x12 Bzn

20

7

14

16

11

10

8

PTT 3x6 Czn

22

21

157

PTT 3x6 Czn

4

PTT

5

4x8 Bzn

6

23

24

15

Ref. No. Part No. Description

1 8278001000 Speaker, 10F05AV 2 8216034000 Packing, Speaker 3 8220462100 Cover, Speaker, B3/X/E 4 8226050000 Button, Push, Power, B3/X/E 5 8226067000 Knob, Pot, B3/X/E 6 8210020100 Box, Speaker, B3/X/E (192631) 7 8216213002 Sound Absorbent, B3/X/E 8 8242041200 Trans, Power, 120V, B3/X/E

8242042001 Trans, Power, 220V/240V, B3/X/E

8242040200 Trans, Power, 100V, B3/X/E 9 8274209000 PCB Assy , Trans, B3X 10 8274216000 PCB Assy , PowerAmp, B3/X/E 11 8220464000 Bracket, PCB, B3/X/E 12 8239002000 Insulator, IC, B3/X/E 13 8274210000 PCB Assy , JK2, B3/X/E 14 8274211000 PCB Assy , LineAmp, B3

8274212000 PCB Assy , LineAmp, B3X

8274213000 PCB Assy , LineAmp, B3E 15 8216198100 Gasket, Rear, B3/X/E 16 8220463201 Panel, Rear, B3 (192630)

8220463202 Panel, Rear, B3X/E (192629) 17 8216196000 Cover, XLR, B3X/E 18 8245392000 Conn, XLR, B3X/E 19 8207000209 Bushing, B3/X/E 20 8276217000 Cord, Power, B3/X/E, CSA

8276215000 Cord, Power, B3/X/E, CND

8276216000 Cord, Power, B3/X/E, EUR

8276879000 Cord, Power, B3/X/E, UK

8276003000 Cord, Power , B3/X/E, JPN 21 8253014008 SW, Power, B3/X/E 22 8256075005 Spark-Killer, 0.0047µF 23 8274214000 PCB Assy , LED, B3/X/E 24 8274215000 PCB Assy , VR, B3/X/E

6301B/BX/BE

5