Fostex NF-1 Manuale utente

NF-1

NF-1A

Service Manual

Model

NEAR FIELD STUDIO MONITOR

SPEAKER SYSTEM

FOSTEX CORPORATION 3-2-35 Musashino, Akishima, Tokyo, Japan 196-0021

FOSTEX CORPORATION OF AMERICA 15431 Blackburn Ave., Norwalk, CA 90650, U.S.A. © PRINTED IN JAPAN FEB. 2000 8288790000

NF-1 & NF-1A NF-1 & NF-1A

SAFETY INSTRUCTIONS

Read instructions - All the safety and operating instruc-

tions should be read before the appliance is operated.

Retain instructions - The safety and operating instructions

should be retained for future reference.

Heed warnings - All warnings on the appliance and in the

operating instructions should be adhered to.

Follow instructions - All operating and use instructions

should be followed.

Water and Moisture - The appliance should not be used

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

with a cart or stand that is recommended by the manufac-

turer.

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 over-

turn.

Wall or Ceiling Mounting - The appliance should be

mounted to a wall or ceiling only as recommended by the

manufacturer.

Ventilation - The appliance should be situated so that its

location or position does not interfere with its proper ven-

tilation. For example, the appliance should not be situ-

ated on a bed, sofa, rug, or similar surface that may block

the ventilation openings; or, placed in a built-in installa-

tion, such as a bookcase or cabinet that may impede the

flow of air through the ventilation openings.

Heat - The appliance should be situated away from heat

sources such as radiators, heat registers, stoves, or other

appliances (including amplifiers) that produce heat.

Power Sources - The appliance should be connected to a

power supply only of the type described in the operating

instructions or as marked on the appliance.

Grounding or Polarization - The precautions that should

be taken so that the grounding or polarization means of

an appliance is not defeated.

Power Cord Protection - Power supply cords should be

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 recep-

tacles, and the point where they exit from the appliance.

Cleaning - The appliance should be cleaned only as rec-

ommended by the manufacturer.

Nonuse Periods - The power cord of the appliance should

be unplugged from the outlet when left unused for a long

period of time.

Object and Liquid Entry - Care should be taken so that

objects do not fall and liquids are not spilled into the en-

closure through openings.

Damage requiring Service - The appliance should be ser-

viced by qualified service personnel when:

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

pliance beyond that described in the operating instruc-

tions. All other servicing should be referred to qualified

service personnel.

REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,

DO NOT REMOVE COVER (OR BACK).

NO USER-SERVICEABLE PARTS INSIDE.

TO PREVENT ELECTRIC SHOCK, MATCH

WIDE BLADE OF PLUG TO WIDE SLOT,

FULLY INSERT.

POUR ÉVITER LES CHOCS ÉLECTRIQUES,

INTRODUIRE LA LAME LA PLUS LARGE DE

LA FICHE DANS LA BORNE CORRE-

SPONDANTE DE LA PRISE ET POUSSER

JUSQU' AU FOND.

CAUTION:

ATTENTION:

The exclamation point within an equilateral

triangle is intended to alert the user to the

presence of important operating and mainte-

nance (servicing) instructions in the literature

accompanying the appliance.

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 en-

closure 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 MOIS-

TURE.”

The power supply cord or the plug has been damaged;

Objects have fallen, or liquid has been spilled into the

appliance; or

The appliance has been exposed to rain; or

The appliance does not appear to operate normally or

exhibits a marked changed in performance; or

The appliance has been dropped, or the enclosure

damaged.

10.

11.

12.

13.

14.

15.

16.

17.

NF-1A Block Diagram

INPUT (UNBAL)

-10dBV

INPUT (BAL)

+4dBu

1: GND

2: HOT

3: COLD

+3dB

LO FREQ.

60Hz

-3dB

HIGH FREQ.

10kHz

+3dB

-3dB3kHz

OFF

HI-MID ATT. VOL

HF POWER TWEETER

WOOFERLF POWER

TWEETER

LEVEL

-3dB 0dB 0dB ON

NF-1 & NF-1A NF-1 & NF-1A

Input PCB

19 1618 20

S110D

6 8

413

19 1618 20

1 3

J101

INPUT (UNBAL)

INPUT (BAL)

-10dBV

+4dBu

J102

C50

JUMPER

R106

10K

R108

8.2K

C102

10/16

C101

10/16

L102

BEAD R102

20K

R101

20K

R103

20K

L101

BEAD

R107

10K

R104

20K

+15V C105

1/50

C106

1/50

-15V

C51

NON

U101A

BA4560N

C104

47p CER

C103

47p CER

C107

10/16

R105

47K

C111

0.027PES C117

0.027PES

R110

39K R111

82K

S110B

R113

1M R114

43K

R112

430K

U101B

BA4560N

C120

10/16

R115

47K

C131

10/16

R131

10K

R132

10K

C134

0.0022

PES

R136

20K

R133

6.8K

C113

1/50 -15V

+15V

R134

18K

R135

4.7K

U102A

BA4560N

C112

1/50

S130A

R121

47K

C122

0.015 PES

R122

C118

10/16

R123

C123

0.015 PES

C124

0.015 PES

U102B

BA4560N

R124

1.6K

R127

470

R125

C125

NON

R126

4.7K

C126

10/16

R128

47K

S120A

VOL.

R140

10KA

C121

10/16

U103B

BA4560N

R139

47K

R129

4.7K R120

4.7K

-15V

J103

TO POWER LED

J104

TO POWER AMP

+15V

R117

C119

NON

C132

1/50

+15V

U103A

BA4560N

R141

10KB

C115

10/16 C133

1/50

R116

47K

-15V

R118

C114

1/50

R119

1.6K

TWEETER

LEV.

HI-MID ATT.

OFF

HI-FREQ.

+3dB

0dB

-3dB

LO FREQ.

+3dB

0dB

-3dB

C136

10/16

S130D

R137

20K

C135

NON

S110A

TABLE OF CONTENTS

NF-1 owner's manual : 8288457000 (for export & domestic model)

NF-1A owner’s manual : 8288459000 (for export model)

: 8288460000 (for domestic model)

Parts List, exploded views and circuit diagrams are given in this manual to assist the service

technician in maintaining the Model NF-1 & NF-1A.

NOTES

The following accessories are supplied with NF-1 as the standard accessories.

Following is the packing material for the Model NF-1.

Carton, inner, 3 pads, NF-1 : 8228739000

Carton, outer, NF-1 : 8228917000

Sheet, mirror : 8216729000

1. SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2. CONTROLS, INDICATORS & CONNECTORS . . . . . . . . . . . . . .

3. EXPLODED VIEW, PCB ASSEMBLY & PARTS LIST . . . . . . . .

4. CIRCUIT & BLOCK DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . .

Following is the packing material for the Model NF-1A.

Carton, inner, NF-1A : 8228738000

Carton, outer, NF-1A : 8228916000

Packing, side, NF-1A : 8228466001

Packing, front, NF-1A : 8228466002

Sheet, mirror : 8216729000

18 3

NF-1 & NF-1A NF-1 & NF-1A

417

1. SPECIFICATIONS

Enclosure system 2-way bass-reflex system

Drivers 160 mm HP woofer x 1 (low-leakage type)

20 mm Soft-Dome tweeter x 1 (low-leakage type)

Impedance 8 Ω

Frequency Response 50 Hz ~ 40 kHz

Crossover Frequency 10 kHz

Sound Pressure Level 89 dB/W (1 m)

Input (Program) 120 W

Enclosure volume 11 liters

Weight Approx. 9.1 kg

NF-1

Specifications and physical appearance are subject to change without notice for product improvement.

4000020000100005000200010005002001005020

100

10 Hz

Second Distortion

Third Distortion

<NF-1 Distortion Characteristic>

30º

60º

4000020000100005000200010005002001005020

100

110

10 Hz

<NF-1 Frequency / Impedance Characteristic>

Ω

274 mm

267 mm

340 mm

240 mm

• NF-1 Dimensions

4. CIRCUIT & BLOCK DIAGRAMS

Power Amp & SW PCB

FUSE

C506 47p CER

R507 10K

U502

LM3886TF

IN+ OUT3

IN-

+38V

GND

MUTE -V

R506

150

C505

1/50

C509

0.1 PES

R509

R505

C508

220p CER

-38V

R508

20K

TO LF

SPEAKER

J502

TO HF

SPEAKER

R515

10K

C513

47p CER

U510

LM3886TF

IN+ OUT3

IN-

+38V

GND

MUTE -V

-38V

C517

0.1 PES

R516

20K

C516

220p CER

U501B

BA4560N

C511

0.0022 PES

R512

C512

100/16

R510

10K R511

10K

C510

0.0039PES

R504

20K

R503

10K

C503

0.01 CER

U501A

BA4560N

C504

0.01CER

C502

0.0022PES

+15V

-15V

C501

0.0022PES

+15V

-15V

W501

TO INPUT

R517

R513

130

+15V

-38V

C008

100/16

R004

270 1/2W RF

+38V

U001

DTC114ES R003

470K

Q001

2SD1200F

C002

4700/63 D002

MTZJ15

C006

10/16

C004

1/50

R001

4.7K

C007

10/16

D003

MTZJ15

Q002

2SB889F -15V

R002

4.7K

C005

1/50

C003

4700/63

-38V R005

270 1/2W RF

C013

NON

D001

GBU6D

CONN-M-03 C014

NON

J501

TRANSFORMER POWER

100V: GRY

120V: BRN

230V: VIO

SW POWER

C011

0.0047

C012

NON

BEAD 6H

J001

AC IN 230V: 1A

100/12V: 3.15A

BRN

WHT

GND

NF-1 & NF-1A NF-1 & NF-1A

16 5

Ref. No. Part No. Description

8274 2720 00 PCB Assy, SW, NF-1A

8251 9930 03 Plain PCB, SW, NF-1A

Ref. No. Part No. Description

C011 8256 0750 05 Spark killer, 0.0047µF

C012 N/A

E001 8239 0002 00 Holder, PI, fuse, S-N5057

J001 8245 3210 00 Connector, PL, jack, AC-INLET, 3P,

0714-FR7

L001, 002 8242 1340 01 Filter, EMI, 6 hole

S001 8253 4710 03 SW, PI, rocker, power, EST15

W001 8277 1630 15 Cable assy, earth lug, SIN1.8, L150

W003, 004 8245 5430 00 Terminal, IPS-5007

W005, 006 8277 1610 10 Cable assy, SIN1.8 - wire, L100

• SW PCB assy

Ref. No. Part No. Description

R121 8230 1384 73 HT, Carbon, 1/4W, 47kΩ, 5%

R122, 123 8230 1383 02 HT, Carbon, 1/4W, 3kΩ, 5%

R124 8230 1381 62 HT, Carbon, 1/4W, 1.6kΩ, 5%

R125 8230 1381 02 HT, Carbon, 1/4W, 1kΩ, 5%

R126 8230 1384 72 HT, Carbon, 1/4W, 4.7kΩ, 5%

R127 8230 1384 71 HT, Carbon, 1/4W, 470Ω, 5%

R128 8230 1384 73 HT, Carbon, 1/4W, 47kΩ, 5%

R129 8230 1384 72 HT, Carbon, 1/4W, 4.7kΩ, 5%

R131, 132 8230 1381 03 HT, Carbon, 1/4W, 10kΩ, 5%

R133 8230 1386 82 HT, Carbon, 1/4W, 6.8kΩ, 5%

R134 8230 1381 83 HT, Carbon, 1/4W, 18kΩ, 5%

R135 8230 1384 72 HT, Carbon, 1/4W, 4.7kΩ, 5%

R136, 137 8230 1382 03 HT, Carbon, 1/4W, 20kΩ, 5%

R139 8230 1384 73 HT, Carbon, 1/4W, 47kΩ, 5%

R140 8240 2930 06 Pot., PI, RT9, 10kΩA, EVUE2A

R141 8240 2930 07 Pot., PI, RT9, 10kΩB, EVUE3A

CAPACITORs

ALU = Electrolytic type

CER = Ceramic type

PES = Mylar type

Ref. No. Part No. Description

C050, 051 N/A

C101, 102 8232 1431 06 VT, ALU, 16V, 10µF, 20 %, SME-VB

C103, 104 8232 8014 70 VT, CER, 50V, 47pF, 5%, SL

C105, 106 8232 1461 05 VT, ALU, 50V, 1µF, 20 %, SME-VB

C107 8232 1431 06 VT, ALU, 16V, 10µF, 20 %, SME-VB

C111 8232 9012 73 VT,PES, 50V, 0.027µF, 5%, AMZF

C112~114 8232 1461 05 VT, ALU, 50V, 1µF, 20 %, SME-VB

C115 8232 1431 06 VT, ALU, 16V, 10µF, 20 %, SME-VB

C116 N/A

C117 8232 9012 73 VT,PES, 50V, 0.027µF, 5%, AMZF

C118 8232 1431 06 VT, ALU, 16V, 10µF, 20 %, SME-VB

C119 N/A

C120, 121 8232 1431 06 VT, ALU, 16V, 10µF, 20 %, SME-VB

C122~124 8232 9011 53 VT, PES, 50V, 0.0015µF, 5%, AMZ

C125 N/A

C126 8232 1431 06 VT, ALU, 16V, 10µF, 20 %, SME-VB

C131 8232 1431 06 VT, ALU, 16V, 10µF, 20 %, SME-VB

C132, 133 8232 1461 05 VT, ALU, 50V, 1µF, 20 %, SME-VB

C134 8232 9012 22 VT,PES, 50V, 0.0022µF, 5%, AMZF

C135 N/A

C136 8232 1431 06 VT, ALU, 16V, 10µF, 20 %, SME-VB

MISCELLANEOUS

Ref. No. Part No. Description

E001 Wire, jumper, F5

E002 Wire, jumper, F10

J101 8245 3390 09 Connector, PI, jack, phone,

YKB21-5006

J102 8245 2680 03 Connector, PI, jack, XLR, NC3FAH2-0

J103 8245 0530 02 Connector, PI, jack, 8283, 2P, WHT

J104 8245 3080 05 Connector, PI, jack, 5P, SBRK 5S-4

L101, 102 8242 1860 13 Filter, T, EMI, LEF7B-M3R2T

DIP: Dual In Line

H: Horizontal mount

ZIP: Zigzag in-line package

SIP: Single in-line package

V: Vertical mount

T: Taping device

P: Penetrate mount

I: I form (straight)

L: L form (right angle)

DG: Digital

AN: Analogue

Abbreviation

Ref. No. Part No. Description

S110 8253 6550 19 SW, PL, slide, 4-3, non-shortening,

SSSFI, L06

S120 8253 6550 20 SW, PL, slide, 2-2, non-shortening,

SSSFI, L06

S130 8253 6550 19 SW, PL, slide, 4-3, non-shortening,

SSSFI, L06

Ref. No. Part No. Description

D001 8234 1044 00 Opt., LED, GRN, SLR-342MG3F

W001 8276 3340 20 Cable assy, 2P,

WHT8263/F-8263/F, L200

Y101 8207 0051 08 Spacer, LED, 11, LH-5-11

• LED assy

NF-1A

Specifications and physical appearance are subject to change without notice for product improvement.

Speakers

Enclosure system 2-way bass-reflex system

Drivers 160 mm HP woofer x 1 (low-leakage type)

20 mm Soft-Dome tweeter x 1 (low-leakage type)

Impedance 8 Ω

Reproduction Frequency Response 50 Hz ~ 40 kHz

Enclosure volume 9.2 liters

Maximum output sound level 106 dB (with VOL max./rated input)

Amplifiers

Output power 60 W each for low and high frequency amplifiers

Tweeter SPL adjustable level ± 3 dB

Filter characteristic adjustable level

HI-FREQ (10 kHz) + 3 / 0 / - 3 dB (selective)

LO-FREQ (60 Hz) + 3 / 0 / - 3 dB (selective)

HI-MID ATT. (3 kHz) 0 dB when switched off.

- 3 dB when switched on.

Input terminals XLR-3-31 type (for balanced input)

∅6 mm phone jack (for unbalanced input)

Normal input level +4 dBu (XLR balanced input)

-10 dBV (phone unbalanced input)

Input impedance 20 kΩor more

Crossover frequency 5 kHz

OthersWeight Approx. 11 kg

Power supply 120 V AC, 60 Hz

230 V AC, 50 Hz

Power consumption 52 W

320 mm

267 mm

340 mm

240 mm

• NF-1A Dimensions

NF-1 & NF-1A NF-1 & NF-1A

615

2. CONTROLS, INDICATORS & CONNECTORS

1. Power LED

2. Heat sink

3. Loudness control [VOL, -∞~ MAX (0dB)]

4. Tweeter level control

[TWEETER LEVEL, -3 ~ 0dB ~ +3]

5. Hi-Mid attenuator [HI-MID ATT., ON / OFF]

6. High-frequency filter selector

[HI-FREQ, +3dB / 0 / -3]

7. Low-frequency filter selector

[LO-FREQ, +3dB / 0 / -3]

8. Unbalanced input terminal

[INPUT, UNBAL -10dBV (phone jack)]

9. Balanced input terminal

[INPUT, BAL +4dBu (XLR)]

10. Power switch [POWER]

11. AC IN connector [AC IN]

NF-1A

AC IN

3k1k 5kHz10kHz

-3dB

0dB

-3dB

0dB

+3dB

HI-MID ATT.HI FREQLO FREQ

-3dB

0dB

+3dB

60Hz

RISQUE ELECTRIQUECHOCDE

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

AVIS:

NE PAS OUVRIR.

WARNING:

SHOCK,DO NOT EXPOSE THIS EQUIPMENT

TO RAIN OR MOISTURE.

REDUCETHE RISKOF FIREOR ELECTRIC

OFF

POWER

+4dBu

BAL

3:C

2:H

1:G

-10dBV

UNBAL

INPUT

-3

+3dB

LO FREQ

-3

+3dB

HI FREQ

OFF

HI-MID ATT.

MAX

(0dB)

VOL

LEVEL

TWEETER

0dB

-3

Ref. No. Part No. Description

8274 2700 00 PCB Assy, Power Amp, NF-1A

8251 9930 01 Plain PCB, Power Amp, NF-1A

ICs

Ref. No. Part No. Description

U001 8236 0781 01 PT, DG, driver, DTC114ES

U501 8236 0361 00 PT, SIP, AN, op amp, BA4560N

U502 8236 0466 00 HZIP, AN, power amp, LM3886TF

U510 8236 0466 00 HZIP, AN, power amp, LM3886TF

TRANSISTORs

Ref. No. Part No. Description

Q001 8234 1099 00 V, NPN, 2SD1200F

Q002 8234 1100 00 V, PNP, 2SB889F

DIODEs

Ref. No. Part No. Description

D001 8234 1977 01 V, stack, GBU6D

D002, 003 8234 5039 59 HT, zener, 15V, MTZJ15

RESISTORs

Ref. No. Part No. Description

R001, 002 8230 1384 72 HT, Carbon, 1/4W, 4.7kΩ, 5%

R003 8230 1384 74 HT, Carbon, 1/4W, 470kΩ, 5%

R004, 005 8230 1292 71 H, fuse, 1/2W, 270Ω, 5%

R501, 502 N/A

R503 8230 1381 03 HT, Carbon, 1/4W, 10kΩ, 5%

R504 8230 1382 03 HT, Carbon, 1/4W, 20kΩ, 5%

R505 8230 1381 02 HT, Carbon, 1/4W, 1kΩ, 5%

R506 8230 1381 51 HT, Carbon, 1/4W, 150Ω, 5%

R507 8230 1381 03 HT, Carbon, 1/4W, 10kΩ, 5%

R508 8230 1382 03 HT, Carbon, 1/4W, 20kΩ, 5%

R509 8230 1381 00 HT, Carbon, 1/4W, 10Ω, 5%

R510, 511 8230 1381 03 HT, Carbon, 1/4W, 10kΩ, 5%

R512 8230 1381 02 HT, Carbon, 1/4W, 1kΩ, 5%

R513 8230 1381 31 HT, Carbon, 1/4W, 130Ω, 5%

R514 8230 1384 72 HT, Carbon, 1/4W, 4.7kΩ, 5%

R515 8230 1381 03 HT, Carbon, 1/4W, 10kΩ, 5%

R516 8230 1382 03 HT, Carbon, 1/4W, 20kΩ, 5%

R517 8230 1381 00 HT, Carbon, 1/4W, 10Ω, 5%

CAPACITORs

ALU = Electrolytic type

CER = Ceramic type

PES = Mylar type

Ref. No. Part No. Description

C002, 003 8232 2054 78 VT, ALU, 63V, 4700µF, 20%,

SMH-VNSN

C004, 005 8232 1461 05 VT, ALU, 50V, 1µF, 20 %, SME-VB

C006, 007 8232 1431 06 VT, ALU, 16V, 10µF, 20 %, SME-VB

C008 8232 1431 07 VT, ALU, 16V, 100µF, 20 %, SME-VB

C013, 014 N/A

C501, 502 8232 9012 22 VT, PES, 50V, 0.0022µF, 5%, AMZF

• POWER AMP PCB assy

Ref. No. Part No. Description

C503, 504 8232 8031 03 VT, CER, 50V, 0.01µF, 5%, YF

C505 8232 1461 05 VT, ALU, 50V, 1µF, 20 %, SME-VB

C506 8232 8014 70 VT, CER, 50V, 47pF, 5%, SL

C507 N/A

C508 8232 8012 21 VT, CER, 50V, 220pF, 5%, SL

C509 8232 9011 04 VT, PES, 50V, 0.1µF, 5%, AMZ

C510 8232 9013 92 VT, PES, 50V, 0.0039µF, 5%, AMZF

C511 8232 9012 22 VT, PES, 50V, 0.0022µF, 5%, AMZF

C512 8232 1431 07 VT, ALU, 16V, 100µF, 20 %, SME-VB

C513 8232 8014 70 VT, CER, 50V, 47pF, 5%, SL

C514, 515 N/A

C516 8232 8012 21 VT, CER, 50V, 220pF, 5%, SL

C517 8232 9011 04 VT, PES, 50V, 0.1µF, 5%, AMZ

MISCELLANEOUS

Ref. No. Part No. Description

E001 Wire, jumper, F5

E002 Wire, jumper, F10

E003 8207 0122 05 Holder, cable, 5P, 51048 (W501)

J501 8245 3050 03 Connector, PI, jack, VH, 3P, WHT

J502 8245 3050 04 Connector, PI, jack, VH, 4P, WHT

Y401 8221 3301 00 Bracket, pcb, power amp, NF-1A

W005~007 8245 5430 00 Terminal, IPS-5007

W501 8276 9185 15 Cable, flat, 5P, S-KINK, L150

W502 N/A

• INPUT PCB assy

Ref. No. Part No. Description

8274 2710 00 PCB Assy, Input, NF-1A

8251 9930 02 Plain PCB, Input, NF-1A

ICs

Ref. No. Part No. Description

U101~103 8236 0361 00 SIP, AN, op amp, BA4560N

RESISTORs

Ref. No. Part No. Description

R101, 102 8230 1382 03 HT, Carbon, 1/4W, 20kΩ, 5%

R103, 104 8230 1382 03 HT, Carbon, 1/4W, 20kΩ, 5%

R105 8230 1384 73 HT, Carbon, 1/4W, 47kΩ, 5%

R106, 107 8230 1381 03 HT, Carbon, 1/4W, 10kΩ, 5%

R108 8230 1388 22 HT, Carbon, 1/4W, 8.2kΩ, 5%

R110 8230 1383 93 HT, Carbon, 1/4W, 39kΩ, 5%

R111 8230 1388 23 HT, Carbon, 1/4W, 82kΩ, 5%

R112 8230 1384 34 HT, Carbon, 1/4W, 430kΩ, 5%

R113 8230 1381 05 HT, Carbon, 1/4W, 1MΩ, 5%

R114 8230 1384 33 HT, Carbon, 1/4W, 43kΩ, 5%

R115, 116 8230 1384 73 HT, Carbon, 1/4W, 47kΩ, 5%

R117 8230 1382 02 HT, Carbon, 1/4W, 2kΩ, 5%

R118 8230 1383 02 HT, Carbon, 1/4W, 3kΩ, 5%

R119 8230 1381 62 HT, Carbon, 1/4W, 1.6kΩ, 5%

R120 8230 1384 72 HT, Carbon, 1/4W, 4.7kΩ, 5%

NF-1A PCB Assy Parts List

NF-1 & NF-1A NF-1 & NF-1A

14 7

8251993 003

C011

C012

J001

GND

PT (WHT)

EUR/UK

JPN/USA/CND

T1A 250V

3.15A 125V

W5 SW

• Parts side of SW PCB assy

C011

C012

J001

W3 PT

W3 PT (WHT)

• Foil side of SW PCB assy

3. EXPLODED VIEW, PCB ASSEMBLY AND PARTS LIST

Ref. No. Part No. Description

1 B805 5830 00 Woofer, NF-1/NF-1A

2 B805 5829 00 Tweeter, NF-1/NF-1A

3 8216 7300 00 Packing

4 8260 5760 00 Enclosure assy, NF-1

5 8216 7280 00 Damping material, 490 x 190 x 10

6 8214 3940 00 Bolt, M3, torx button, L20, T

(included in the enclosure assy)

7 8214 3930 00 Bolt, M4, torx button, L20, T

(included in the enclosure assy)

8 8216 7240 00 HP reflector, NF-1 (not included

in the enclosure assy)

9 8245 3580 00 Terminal, CL-S48-1

10 8276 9200 00 Cord, red, L = 350

11 8276 9200 01 Cord, blk, L = 350

NF-1 OVERALL EXPLODED VIEW & PARTS LIST

Ref. No. Part No. Description

12 8276 9200 03 Cord, blk, L = 300

13 8277 5020 00 Cable assy, L = 300 (+ C 1.0µF)

14 0532 1031 06 CM1.0, film capacitor

15 8220 8490 00 Emblem, FOSTEX

RED (+): To Woofer

BLK (-): To Woofer

15 14

RED (+): To Tweeter

BLK (-): To Tweeter

NF-1 & NF-1A NF-1 & NF-1A

813

Ref. No. Part No. Description

1 B805 5830 00 Woofer, NF-1

2 B805 5829 00 Tweeter, NF-1

3 8216 7300 00 Packing

4 8260 5770 00 Enclosure assy, NF-1A

5 8216 7280 00 Damping material, 490 x 190 x 10

6 8214 3940 00 Bolt, M3, torx button, L20, T

(included in the enclosure assy)

7 8214 3930 00 Bolt, M4, torx button, L20, T

(included in the enclosure assy)

Ref. No. Part No. Description

8 8216 7240 00 HP reflector, NF-1 (not included

in the enclosure assy)

9 8270 8830 00 LED assy, NF-1A

10 8277 5041 45 Cable assy, 2P,

WHT8263/F-8263/M, L450

11 8277 5010 00 Cable assy, SP, NF-1A

12 8216 7340 02 Sheet, connector, NF-1A

13 8221 3290 00 Bracket, connector, NF-1A

14 8207 0002 25 Bushing, SR-6N3-4

15 8216 7350 00 Sheet, chassis, NF-1A

16 8218 7950 00 Plate, name, NF-1A

NF-1A OVERALL EXPLODED VIEW (Speaker & Enclosure Section)

POWER

BTP3 x 16BZn

• Foil side of Input PCB assy

INPUT. NF-1A

R139

R116

R119

R118

R128

R125

R127

R132

R136

C134

R133

R134

R135

C111

R113

R114

R105

C121

C115

C114

C118

C126

C131

C133

C112

C113

C136

C120

C105

C106

C107 C102

C101

L102

L101

C119

R124

C124

C123

C122

C135

C117

C51

R117

R126

R120

R129

R121

R122

R125

R123

R131

R115

R111

R112

R101

R102

R104

C104 R103

R106

R108

R107

C050

C103

R110

R137

C132

U103 U102

U101

R140 R141 S120 S130 S110

J101

8745

J102

J104

1J103

NF-1 & NF-1A NF-1 & NF-1A

12 9

8251993 002

INPUT

R139

R116

R119

R118

R128

R125

R127

R132

R136

C134

R133

R134

R135

C111

R113

R114

R105

C121C115

C114C118

C126

C131

C133

C113

C136

C120

C105

C106

C107

C102

C101

L102

L101

C119

R124

J103

C124

C123

C122

C135

C117

C51

R117

R126

C112

R129

R120

R121

R122

R125

R123

R131

R115

R111

R112

R101

R102

R104

C104

R103

R106

R108

R107

C050

C103

R110

R137

C132

U101

U102 U103

S120 TW LEV

R141 VOL

R140

HI-MID ATT

S130S110 HI CARCTLO CARCT

J101

J102

J104

• Parts side of Input PCB assy

NF-1A OVERALL EXPLODED VIEW (Amplifier Section)

Ref. No. Part No. Description

17 8221 3311 00 Chassis, amp, NF-1A

18 8221 2610 00 Bracket, AC-IN, FD-8/NF-1A

19 8216 7370 00 Cover, SW, NF-1A

20 8207 0133 10 Heat sink, NF-1A

21 8274 2700 00 PCB assy, Power Amp, NF-1A

22 8274 2710 00 PCB assy, Input, NF-1A

23 8274 2720 00 PCB assy, SW, NF-1A

24 8204 0580 04 Spacer, 6, M3 x 6

25 8242 2680 00 Transformer, power, 120V,

USA/CND, NF-1A

8242 2690 00 Transformer, power, 230V,

EUR/UK, NF-1A

8242 2700 00 Transformer, power, 100V,

JPN, NF-1A

26 8253 4230 00 SW, WI, rocker, power,

SDDLA1

27 8216 7340 01 Sheet, transformer, NF-1A

28 8245 3400 00 Nut, phone jack

29 8221 3360 00 Bracket, PCB, input, NF-1A

30 8239 1003 19 Fuse, 20, TLAG, 3.15A, 125V,

USA/CND/JPN

8239 0007 10 Fuse, 20, TDLY, 1A, 250V,

EUR/UK

31 8276 8010 00 Code, power, UL/CSA,

VM0033-0089, USA/CND

8276 8021 00 Cord, power, CEE,

0309B-0310B, EUR

8276 9170 00 Cord, power, BS, 3C,

KP610-KS31A, UK

8276 8000 00 Cord, power, DM,

VM1292-1298, JPN

32 8216 7340 03 Sheet, transformer, B

33 8207 0117 04 Holder, cord, CS-1

BBT3 x 8

BZn

BBT3 x 8BZn

BBT3 x 8BZn BTP3.5 x 8BZn

BBT3 x 8

BZn

BTT4 x 10

BZn

BTT4 x 10

BZn

LW4

LWE4

BBT3 x 8

BZn

BTP3.5 x 8BZn

BBT3 x 8

BZn

BTT4 x 10

BZn

B3 x 8BZn

B3 x 4BZn

BBT3 x 8

BZn

LWE3

LW3.5

W3.5

BTT4 x 10

BZn

From

Transformer

GND cable

BBT3 x 6BZn

NF-1 & NF-1A NF-1 & NF-1A

10 11

• Foil side of Power Amp PCB assy

U502 U510

C509

C505

C007

C504

C503

C006

D003

D002 C005

C002 C003

C004

R504

R503

C501

C502

C511

R511

R510

C510

R512

R513

C517

J502

J501

D001

R516

C508

R506

R509 R508 C513

R515

R517

C014

C013

R005

R004

R003 C008 C512

C506

R507

R505

R516

R001

Q001

R002

Q002

U501

U001

W501

11 111 1

NF-1A PCB Pattern Drawing

• Parts side of Power Amp PCB assy

D001

J501

P.TRANS

C013 C003 R517

U510

113

U502

111

LF (HOT)

HF (HOT)

C517

R513

D003

C503

C504

R503

C510

R510

R511

C511

C504

C502

D002 C516

R512

J502 SPEAKER

R515

R003

R508

R505

R506

C508

C509

R507

C506

R509

R516

C512 C008

R002

R001

R005

R004

POWER AMP

8251993 001

Q002

Q001

C005

C004 C006 C007

C505

U501 W501

TO INPUT

U001

C513

C002

C014

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