Fostex NF-1, Service Manual

Page: 6 / 10

NF-1 & NF-1A NF-1 & NF-1A
6 15
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
3k 1k 5kHz 10kHz
-3dB
0dB
-3dB
0dB
+3dB
HI-MID ATT. HI FREQ LO FREQ
-3dB
0dB
+3dB
60Hz
RISQUE ELECTRIQUE CHOC DE
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
AVIS:
NE PAS OUVRIR.
WARNING:
TO
SHOCK,DO NOT EXPOSE THIS EQUIPMENT
TO RAIN OR MOISTURE. REDUCE THE RISK OF FIREOR ELECTRIC
OFF
ON
POWER
+4dBu
BAL
3:C
2:H
1:G
-10dBV
UNBAL
INPUT
-3
0
+3dB
LO FREQ
-3
0
+3dB
HI FREQ
OFF
ON
HI-MID ATT.
MAX
(0dB)
VOL
LEVEL
TWEETER
0dB
-3
+3
3
4
5
6
7
8
9
10
11
2
1
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, 4.7k
Ω
, 5%
R003 8230 1384 74 HT, Carbon, 1/4W, 470k
Ω
, 5%
R004, 005 8230 1292 71 H, fuse, 1/2W, 270
Ω
, 5%
R501, 502 N/A
R503 8230 1381 03 HT, Carbon, 1/4W, 10k
Ω
, 5%
R504 8230 1382 03 HT, Carbon, 1/4W, 20k
Ω
, 5%
R505 8230 1381 02 HT, Carbon, 1/4W, 1k
Ω
, 5%
R506 8230 1381 51 HT, Carbon, 1/4W, 150
Ω
, 5%
R507 8230 1381 03 HT, Carbon, 1/4W, 10k
Ω
, 5%
R508 8230 1382 03 HT, Carbon, 1/4W, 20k
Ω
, 5%
R509 8230 1381 00 HT, Carbon, 1/4W, 10
Ω
, 5%
R510, 511 8230 1381 03 HT, Carbon, 1/4W, 10k
Ω
, 5%
R512 8230 1381 02 HT, Carbon, 1/4W, 1k
Ω
, 5%
R513 8230 1381 31 HT, Carbon, 1/4W, 130
Ω
, 5%
R514 8230 1384 72 HT, Carbon, 1/4W, 4.7k
Ω
, 5%
R515 8230 1381 03 HT, Carbon, 1/4W, 10k
Ω
, 5%
R516 8230 1382 03 HT, Carbon, 1/4W, 20k
Ω
, 5%
R517 8230 1381 00 HT, Carbon, 1/4W, 10
Ω
, 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, 20k
Ω
, 5%
R103, 104 8230 1382 03 HT, Carbon, 1/4W, 20k
Ω
, 5%
R105 8230 1384 73 HT, Carbon, 1/4W, 47k
Ω
, 5%
R106, 107 8230 1381 03 HT, Carbon, 1/4W, 10k
Ω
, 5%
R108 8230 1388 22 HT, Carbon, 1/4W, 8.2k
Ω
, 5%
R110 8230 1383 93 HT, Carbon, 1/4W, 39k
Ω
, 5%
R111 8230 1388 23 HT, Carbon, 1/4W, 82k
Ω
, 5%
R112 8230 1384 34 HT, Carbon, 1/4W, 430k
Ω
, 5%
R113 8230 1381 05 HT, Carbon, 1/4W, 1M
Ω
, 5%
R114 8230 1384 33 HT, Carbon, 1/4W, 43k
Ω
, 5%
R115, 116 8230 1384 73 HT, Carbon, 1/4W, 47k
Ω
, 5%
R117 8230 1382 02 HT, Carbon, 1/4W, 2k
Ω
, 5%
R118 8230 1383 02 HT, Carbon, 1/4W, 3k
Ω
, 5%
R119 8230 1381 62 HT, Carbon, 1/4W, 1.6k
Ω
, 5%
R120 8230 1384 72 HT, Carbon, 1/4W, 4.7k
Ω
, 5%
NF-1A PCB Assy Parts List