Fostex 6301B Service manual
Fostex 6301B is a personal monitor that delivers more than 10Wrms of output power with an impedance of 4Ω and an efficiency of 84 dB/W (1m). It features an internal 10cm full range single cone speaker, ensuring high-quality audio reproduction. The device has various input options, including unbalanced and balanced types, making it compatible with various audio sources. Additionally, it comes with a knob to adjust the volume and a push-button for power control.
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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.
ATTENTION:
POUR ÉVITER LES CHOCS ÉLECTRIQUES,
INTRODUIRE LA LAME LA PLUS LARGE DE
L A F I C H E D A N S L A B O R N E C O R R E -
SPONDANTE DE LA PRISE ET POUSSER
JUSQU' AU FOND.
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 MOIS-
TURE.”
SAFETY INSTRUCTIONS
1.
2.
3.
4.
5.
6.
Read instructions - All the safety and operating instructions 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 manufacturer.
7.
8.
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 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 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.
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.
9.
10.
11.
12.
13.
14.
15.
16.
17.
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 receptacles, and the point where they exit from the appliance.
Cleaning - The appliance should be cleaned only as recommended 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 enclosure through openings.
Damage requiring Service - The appliance should be serviced by qualified service personnel when:
A.
The power supply cord or the plug has been damaged;
B.
or
Objects have fallen, or liquid has been spilled into the
C.
D.
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
E.
The appliance has been dropped, or the enclosure damaged.
Servicing - The user should not attempt to service the appliance 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
EUR
UK
JPN
: 0260001 and onwards
: 0660001 and onwards
: 0760001 and onwards
: 1060001 and onwards
1. SPECIFICATIONS
SPEAKER ( Internal )
Type
Impedance
Efficiency
AMPLIFIER
Normal Input Level
Output
Frequency Response
Distortion
Residual Noise
Input Sensitivity
Input Impedance
GENERAL
Dimensions
Weight
Power supply
JPN
USA/CND
EUR/UK
Power consumption
10cm Full Range Single Cone
4
Ω
84 dB/W (1m)
-10dBV more than 10Wrms ( 8
Ω load )
20 ~ 50 kHz +0dB-3dB
0.05 % or less ( at 1W output )
-70dBV (0.3mV)
Unbalanced type : -6dBV (0.5Vrms)
Balanced type : +4dBm (1.2Vrms)
Unbalanced type : Higher than 20k
Ω
Balanced type : Higher than 10k
Ω
120 (W)
×
188 (H)
×
118 (D) mm
3.0 kg
100 VAC, 50/60 Hz
120 VAC, 60 Hz
230 VAC, 50/60 Hz
33 W
3
3
4
BTT
4x12 Bzn
5
1
2
BTT
4x12 Bzn
PTT
4x8 Bzn
7
PTT
4x8 Bzn
6
15
BTT
4x12 Bzn
BTT
4x12 Bzn
PTP WH
3x10 Bzn
17
18
9
13
12
8
10
11
14
7 15
21
PTT
3x6 Czn
22
PTT
3x6 Czn
19
P 4x10 Bzn
BTT
4x12 Bzn
20
16
PTT
3x8 Ni
15
23
15
24
9
10
11
12
13
14
Ref. No.
1
2
3
6
7
8
4
5
15
16
17
18
19
20
21
22
23
24
Part No.
Description
8278001000 Speaker, 10F05AV
8216034000 Packing, Speaker
8220462100 Cover, Speaker, B3/X/E
8226050000 Button, Push, Power, B3/X/E
8226067000 Knob, Pot, B3/X/E
8210020100 Box, Speaker, B3/X/E (192631)
8216213002 Sound Absorbent, B3/X/E
8242041200 Trans, Power, 120V, B3/X/E
8242042001 Trans, Power, 220V/240V, B3/X/E
8242040200 Trans, Power, 100V, B3/X/E
8274209000 PCB Assy, Trans, B3X
8274216000 PCB Assy, PowerAmp, B3/X/E
8220464000 Bracket, PCB, B3/X/E
8239002000 Insulator, IC, B3/X/E
8274210000 PCB Assy, JK2, B3/X/E
8274211000 PCB Assy, LineAmp, B3
8274212000 PCB Assy, LineAmp, B3X
8274213000 PCB Assy, LineAmp, B3E
8216198100 Gasket, Rear, B3/X/E
8220463201 Panel, Rear, B3 (192630)
8220463202 Panel, Rear, B3X/E (192629)
8216196000 Cover, XLR, B3X/E
8245392000 Conn, XLR, B3X/E
8207000209 Bushing, B3/X/E
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
8253014008 SW, Power, B3/X/E
8256075005 Spark-Killer, 0.0047
µ
F
8274214000 PCB Assy, LED, B3/X/E
8274215000 PCB Assy, VR, B3/X/E
6301B/BX/BE
5
6301B/BX/BE
3. PCB ASSY AND PARTS LIST
PCB Assy PowerAmp 8274216000
Ref. No.
C001
Part No.
8232050471
C002 8232098105
C003, 004 8232097227
C005
C006
8232095476
8232026123
C007 8232026104
C008, 009 8232074000
C010 8232026103
C011, 012 8232133478
D001
R001
8234001607
8230004102
R002
R004
R005
R006
8230004563
8230004122
8230004563
8230004153
R007
R008
R010
U001
8230004102
8230004100
8230004222
8234045600
Description
CAP, CER, 50V, 470pF, 5%
CAP, ALU, 50V, 1
µ
F, 20%
CAP, ALU, 35V, 220
µ
F, 20%
CAP, ALU, 16V, 47
µ
F, 20%
CAP, PES, 50V, 0.012
µ
F, 5%
CAP, PES, 50V, 0.1
µ
F, 5%
CAP, CER, 50V, 0.1
µ
F, 20%
CAP, PES, 50V, 0.01
µ
F, 5%
CAP, ALU, 35V, 4700
µ
F, 20%
D, STACK, 2W02G
RES, CARBON, 1/4W, 1K, 5%
RES, CARBON, 1/4W, 56K, 5%
RES, CARBON, 1/4W, 1.2K, 5%
RES, CARBON, 1/4W, 56K, 5%
RES, CARBON, 1/4W, 15K, 5%
RES, CARBON, 1/4W, 1K, 5%
RES, CARBON, 1/4W, 10, 5%
RES, CARBON, 1/4W, 2.2K, 5%
IC, PowerAmp, TDA2050
PCB Assy LineAmp 8274211000
Ref. No.
Part No.
C021, 022 8232095106
C021, 022
C023 8232095106
Description
CAP, ALU, 16V, 10
µ
F, 20%
Jumper
CAP, ALU, 16V, 10
µ
F, 20%
CAP, ALU, 25V, 47
µ
F, 20%
RES, CARBON, 1/4W, 10K, 5%
C024, 025 8232096476
R021 8230004103
R022
R022
R023
R024
R024
R025
R026
R027
8230004103
8230004102
8230004392
8230004103
8230004392
8230004103
8230004392
RES, CARBON, 1/4W, 10K, 5%
RES, CARBON, 1/4W, 1K, 5%
RES, CARBON, 1/4W, 3.9K, 5%
RES, CARBON, 1/4W, 10K, 5%
Jumper
RES, CARBON, 1/4W, 3.9K, 5%
RES, CARBON, 1/4W, 10K, 5%
RES, CARBON, 1/4W, 3.9K, 5%
R028, 029 8230004102
U002 82360212000
RES, CARBON, 1/4W, 1K, 5%
IC, Analog, NJM4560DX
DZ001, 002 8234503959
CN002 8245053003
JK001
JP006, 007
8245103000
D, ZENER, MTZ J 15C
Conn, JACK, 8263, 3P, WHT
Conn, Phone, B/BX/BE
Jumper
6
B BX BE
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
B BX BE
* * *
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
PCB Assy JK2 8274210000
Ref. No.
JK002
Part No.
8245103000
Description
Conn, Phone, B/BX/BE
PCB Assy VR 8274215000
Ref. No.
VR001
Part No.
8240212002
Description
POT, 50KA, B/BX/BE
PCB Assy LED 8274214000
Ref. No.
D002
Part No.
8234006400
Description
OPT, LED, RED, GL-3PR8
PCB Assy TRANS 8274209000
Ref. No.
Part No.
R031, 032 8230004512
R034 8230004102
T002
CN002
8242099000
8245053003
Description
RES, CARBON, 1/4W, 5.1K, 5%
RES, CARBON, 1/4W, 1K, 5%
TRANS, LINE, BX
Conn, JACK, 8263, 3P, WHT
B BX BE
* * *
B BX BE
* * *
B BX BE
* * *
B BX BE
*
*
*
*
6301B/BX/BE
7
8
6301B/BX/BE
4. PATTERN DRAWING
D2
TRANS
6301-106
R34
R32
R31
P
W51
N
G S GI/P
VR1W41
G I O
6301-103
W31
R29
U2
R27
ZD2 ZD1
C23 JK1 JP7
R28
VV+ S G
W21
JP6
W12
VV+ S G
W14
G S GI/P
6301-101 PO
C3
C9
C8
C4
C5
R6
R4
U3
R8
R7
C10
C7
C6
O
W13
I G
D1
SPK
W10
TO
R10
C12
C11
6301B
P1
AC POWER IN
6301-104
VR1
50KA
3
2
1
4
3
2
1
W41
S1
Z1
6301-102
JK1
2
4
1
W21
1
2
3
4
T1
6301-101
+VCC1 C3
220/35
ORG
BLK
ORG
W14
1
2
3
4
W12
1
2
3
4
W11
4
R1
1K
C1
470P
C2
1/50
R2
56K
TDA2050
1
2
5
4
C8
0.1
U1
3
C9
0.1
C4
220/35
-VCC1
R5
56K
R6
15K
R4
1.2K
C5
47/16
R8
10
C10
0.01
C6
0.012
C7
0.1
SGND1
PGND1
R7
1K
3
2
1
2
1
W13
W10
+VCC1
R10
2.2K
W15
1
2
PGND1
2
D1
1
C11
4700/35
3
C12
4700/35
+VCC1
PGND1 SGND1
-VCC1
6301-103
W31
3
2
1
2
4
1
JK2
SP1
EXT SP
SP
6301-105
W51
1
2
D2
POWER LED
6301BX
RED
WHT
2
J3
3
BALANCE
INPUT
1
GND
WIPT
3
2
1
6301-106
CN1
3
2
1
R31
5.1K
BRN
1
T2
R32
5.1K
R34
1K
RED
1
BLK
1
UNBALANCE
INPUT
ORG
1
W62
3
2
1
YEL
1
6301-102
CN2/W26
3
2
1
R21
NON
SGND
JK1
2
4
1
SGND
R23
3.9K
+VCC
C21
NON
R22
1K
JP7
SGND
R24
10K
JP6
SGND
2
3
8
4560
U2A
4
1
-VCC
R26
NON
C22
NON
R25
3.9K
+VCC
R28
1K
C24
47/25
ZD1
15B2
SGND C25
47/25
ZD2
15B2
R29
1K
6301-104
VR1
50KA
3
2
1
R27
3.9K
6
5
SGND
4560
U2B
C23
10/16
7
4
3
2
1
W41
W21
1
2
3
4
-VCC
AC POWER IN
P1
S1
Z1
T1
6301-101
+VCC1 C3
220/35
W14
1
2
3
4
W12
1
2
3
4
ORG
W11
BLK
ORG
4
R1
1K
C1
470P
C2
1/50
R2
56K
TDA2050
1
2
5
C8
0.1
4
3
U1
C9
0.1
C4
220/35
-VCC1
R5
56K
R6
15K
R4
1.2K
C5
47/16
C6
0.012
C7
0.1
R8
10
C10
0.01
SGND1
PGND1
R7
1K
3
W13
2
1
W10
2
1
+VCC1
R10
2.2K
W15
1
2
PGND1
2
D1
3
1
C11
4700/35
C12
4700/35
+VCC1
PGND1 SGND1
-VCC1
6301-103
W31
3
2
1
2
4
1
JK2
EXT SP
SP
SP1
6301-105
W51
1
2
D2
POWER LED
6301BE
6301-104
3
VR1
50KA
2
1
4
3
2
1
W41
BALANCE
INPUT
RED
WHT
2 1
GND
J3
3
UNBALANCE
INPUT
6301-102
WIPT
3
2
1
CN2/W26
3
2
1
R21
10K
R23
3.9K
+VCC
C21
10/16
R22
10K
SGND
JP7
SGND
R24
NON
JP6
C22
10/16
2
3
8
4560
U2A
4
1
-VCC
R26
10K
R25
3.9K
R27
3.9K
6
5
SGND
4560
U2B
7
C23
10/16
SGND
JK1
2
4
1
SGND
+VCC
R28
1K
C24
47/25
ZD1
15B2
SGND C25
47/25
ZD2
15B2
R29
1K
W21
1
2
3
4
-VCC
AC POWER IN
P1
S1
Z1
T1
6301-101
+VCC1 C3
220/35
W14
1
2
3
4
W12
1
2
3
4
ORG
W11
BLK
ORG
4
R1
1K
C1
470P
C2
1/50
R2
56K
TDA2050
1
2
5
C8
0.1
4
3
U1
C9
0.1
C4
220/35
-VCC1
R5
56K
R6
15K
R4
1.2K
C5
47/16
C6
0.012
C7
0.1
R8
10
C10
0.01
SGND1
W13
3
2
1
PGND1
R7
1K
W10
2
1
+VCC1
R10
2.2K
W15
1
2
PGND1
2
3
D1
1
C11
4700/35
C12
4700/35
+VCC1
PGND1 SGND1
-VCC1
6301-103
W31
3
2
1
2
4
1
JK2
EXT SP
SP1
SP
6301-105
W51
1
2
D2
POWER LED
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 1999 8288779000
advertisement
Key Features
- 10cm full-range single-cone speaker for clear and balanced sound
- 84 dB/W (1m) efficiency for powerful audio output
- 20 ~ 50 kHz frequency response for accurate sound reproduction
- 0.05% or less distortion for pristine audio clarity
- -70dBV (0.3mV) residual noise for a quiet listening experience
- Unbalanced and balanced inputs for versatile connectivity
- Compact and portable design for easy transport and setup