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Service Manual
Model
DS-8
DIGITAL AUDIO SELECTOR
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 OCT. 1999 8288786000
DS-8
DS-8
CAUTION: CAUTION
RISK OF ELECTRIC SHOCK DO NOT OPEN TO PREVENT ELECTRIC SHOCK, MATCH WIDE BLADE OF PLUG TO WIDE SLOT, FULLY INSERT.
OUTPUT 1 (COAXIAL)
OUTPUT 2 (COAXIAL)
OUTPUT 3 (OPTICAL)
OUTPUT 4 (OPTICAL)
OUTPUT 5 (OPTICAL)
OUTPUT 6 (OPTICAL)
OUTPUT 7 (OPTICAL)
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 LA FICHE DANS LA BORNE CORRESPONDANTE DE LA PRISE ET POUSSER JUSQU' AU FOND.
INPUT SELECTOR OUT 1
INPUT SELECTOR OUT 3
INPUT SELECTOR OUT 5
INPUT SELECTOR OUT 2
INPUT SELECTOR OUT 4
INPUT SELECTOR OUT 6
INPUT SELECTOR OUT 7
"WARNING"
"TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE."
SAFETY INSTRUCTIONS
1. 2. 3. 4. 5. 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. 9. 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; or B. Objects have fallen, or liquid has been spilled into the appliance; or C. The appliance has been exposed to rain; or D. 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.
10.
11.
12.
6.
13. 14.
INPUT 1 (COAXIAL)
INPUT 2 (COAXIAL)
INPUT 3 (OPTICAL)
INPUT 4 (OPTICAL)
15.
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.
16.
17.
BLOCK DIAGRAM
INPUT 5 (OPTICAL)
INPUT 6 (OPTICAL)
INPUT 7 (OPTICAL)
INPUT 8 (OPTICAL)
INPUT SELECTOR OUT 8
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.
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.
OUTPUT 8 (OPTICAL)
11
DS-8
DS-8
S18 SRBV18
S17 SRBV18
OUT8 INPUT SEL 1 10 OUT7 INPUT SEL
S16 SRBV18
S15 SRBV18
S14 SRBV18
OUT4 INPUT SEL
OUT5 INPUT SEL
OUT6 INPUT SEL
S13 SRBV18
OUT3 INPUT SEL
S12 SRBV18
OUT2 INPUT SEL
S11 SRBV18
OUT1 INPUT SEL
SW PCB
DGND
IN5 IN1 IN6 IN2 IN7 IN3 IN8 IN4 OUT8 OUT1 OUT7 OUT2 OUT6 OUT3 OUT5 OUT4
17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
FPC-17P
10
J2
1 10
1 10
1 10
1 10
1 10
1 10
1 10
2 3 4 5 6 7 8 9
2 3 4 5 6 7 8 9
2 3 4 5 6 7 8 9
2 3 4 5 6 7 8 9 2 3 4 5 6 7 8 9 2 3 4 5 6 7 8 9 2 3 4 5 6 7 8 9 2 3 4 5 6 7 8 9
TABLE OF CONTENTS
1. SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2. CONTROLS, INDICATORS AND CONNECTORS . . . . . . . . . . . . 4 3. EXPLODED VIEW, PCB ASSEMBLY AND PARTS LIST . . . . . . 5 4. CIRCUIT & BLOCK DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . 9
NOTES * Parts List and circuit diagrams are given in this manual to assist the service technician in maintaining
the Model DS-8.
* The following accessories are supplied with DS-8 as the standard accessories.
Owner's manual
!
: 8288449000 (for export model) : 8288450000 (for domestic model) : 8270727003 (for USA/CND) : 8270727006 (for EUR) : 8270727007 (for UK) : 8270727010 (for JPN)
AC adaptor AD-12A
* Following is the packing material for the Model DS-8.
Carton, inner, DS-8 Packing side, DS-8 Packing, AC, DS-8 : 8228734000 : 8228436000 : 8228437000
CAUTION
!
Parts marked with this sign are safety critical components. They must always be replaced with identical components. Refer to the Fostex Parts List and ensure exact replacement.
3
3 2 1
U31 GPIF37R1
1 3 INPUT5 (OPTICAL) 2
R35 3.3K
R37 jumper
U2C 74HC04 5 R36 2.2K DGND D+5 1 U41 GPIF37R1 3 INPUT6 (OPTICAL) 2 R46 2.2K DGND D+5 C53 0.1 1 U51 GPIF37R1 3 INPUT7 (OPTICAL) 2 R56 2.2K DGND D+5 C63 0.1 U61 GPIF37R1 1 3 INPUT8 (OPTICAL) 2 R66 2.2K DGND DGND DGND J2 FPC-17P 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 DGND D+5 DGND D+5 C43 0.1 DGND D+5 6
C35 0.1 U3C 74HC04 6 5
2 1 3
DGND U32 GPIF38T2 OUTPUT5 (OPTICAL) D2 LED R1 470 J1 YKB31-0012 DGND D+5 R45 3.3K R47 jumper U2D 74HC04 9 8 C45 0.1 U3D 74HC04 8 9 2 1 3 L2 jumper W4 L1 jumper W3 C1 10/35 U42 GPIF38T2 OUTPUT6 (OPTICAL) S1 D1 DIODE
3 2 1
IN5 IN1 IN6 IN2 IN7 IN3 IN8 IN4 OUT8 OUT1 OUT7 OUT2 OUT6 OUT3 OUT5 OUT4
4
DS-8
< REAR PANEL >
< FRONT PANEL >
1. SPECIFICATIONS
2. CONTROLS, INDICATORS & CONNECTORS
1. 2. 3. 4.
4 3 1 2
OUTPUT 1
INPUT 1
POWER SUPPLY
12V DC IN
8 7 5 6
9
4 3 1 2
OUTPUT 2
INPUT 2
7
8 4 3 1 2 7 5 6
6
OUTPUT 3
INPUT 3
5
8 7 5 6
8
1 2 4 3
OUTPUT 4
INPUT 4
4
5 6 8 7
INPUT 1, 2 (COAXIAL IN) Connector Input Impedance Normal Input Level Format INPUT 3 - 8 (OPTICAL IN) Connector Format OUTPUT 1, 2 (COAXIAL OUT) Connector Input Impedance Normal Input Level Format OUTPUT 3 - 8 (OPTICAL OUT) Connector Format DC IN SAMPLING FREQUENCY DIMENSIONS WEIGHT POWER REQUIREMENT
S/P DIF OUTPUT
1
4 3
1
2
INPUT SELECTOR
3
OUTPUT 5
INPUT 5
2
8 7 4 3 2 1 5 6
7
OUTPUT 6
1
INPUT 6 8 7 4 3 2 5 6 1
7
OUTPUT 7
INPUT 7
6
8 7 5 6
INPUT SELECTOR [INPUT SELECTOR 1 - 8] Input connector 8 [S/P DIF INPUT 8] Output connector 8 [S/P DIF OUTPUT 8] Power switch / POWER LED [POWER]
1 2 4 3 INPUT 8
5
6
OUTPUT 8
RCA pin jack 75 0.5 Vp-p S/P DIF (IEC60958 part 3)
Square shape optical S/P DIF (IEC60958 part 3)
RCA pin jack 75 0.5 Vp-p S/P DIF (IEC60958 part 3)
Square shape optical S/P DIF (IEC60958 part 3) 12 V (Inner: Plus, Outer: Minus) 32 kHz ~ 96 kHz 44 (H) x 482 (W) x 113 (D) mm 1.4 kg (excluding accessories) JPN : 100 V AC USA/CND : 120 V AC UK/EUR : 230 V AC Fostex AC adaptor AD-12A
Specifications and appearance are subject to change without notice for product improvement.
5. 6. 7. 8. 9.
7 5 6 8
4
S/P DIF INPUT
S/P DIF DIGITAL AUDIO SELECTOR
3 2
5
1
2
S/P DIF INPUT
8
S/P DIF OUTPUT
8
3
Input connector 1, 2 [S/P DIF INPUT 1, 2] Input connector 3 - 7 [S/P DIF INPUT 3 - 7] Output connector 1, 2 [S/P DIF OUTPUT 1, 2] Output connector 3 - 7 [S/P DIF OUTPUT 3 - 7] DC IN connector [DC IN 12V]
4
POWER
MAIN / REGULATOR PCB
C11 22P J11 YKC21-3079 L11 jumper 1 2 INPUT2 (COAXIAL) 3 DGND 4 D+5 5 L21 jumper DGND C25 33/25 R22 10 D21 DIODE R23 47K 13 R21 75 DGND D+5 D+5 C13 0.1 U11 GPIF37R1 1 3 INPUT3 (OPTICAL) 2 R16 2.2K DGND D+5 C23 0.1 U21 GPIF37R1 1 3 INPUT4 (OPTICAL) 2 R26 2.2K DGND D+5 C33 0.1 D+5 DGND DGND D+5 J5 8283-3P R25 3.3K R27 jumper U2B 74HC04 3 4 U3B 74HC04 4 3 DGND D+5 DGND D+5 C25 0.1 2 1 3 D22 DIODE DGND 12 U1F 74HCU04 C22 47P R24 2.2K DGND C21 22P DGND DGND U4B L23 BEAD U1C 74HCU04 6 5 C27 33/25 L22 jumper T21 1 2 U1D 74HCU04 8 9 DGND DGND U4C R15 3.3K R17 jumper U2A 74HC04 1 2 C15 0.1 U3A 74HC04 2 1 3 4 TRANSFORMER D+5 2 1 3 6 R28 75 C15 33/25 R12 10 D+5 L13 BEAD D11 DIODE R13 47K 1 R11 75 D12 DIODE U1A 74HCU04 2 C12 47P R14 2.2K U1B 74HCU04 4 3 C17 33/25 L12 jumper T11 1 2 U1E 74HCU04 10 11 3 4 3 TRANSFORMER 4 5 DGND C14 0.1 L24 BEAD DGND DGND C24 0.1 1 U4A 2 13 U4F 12 OUTPUT2 (COAXIAL) 11 U4E 10 6 R18 75 1 L14 BEAD 2 OUTPUT1 (COAXIAL) J12 YKC21-3079 D+5
INPUT1 (COAXIAL)
9
U4D
8
U12 GPIF38T2 OUTPUT3 (OPTICAL)
PCB, REGULATOR
U91 3 C91 0.1 IN 78M05 OUT 1 C92 0.1 G 2
4. CIRCUIT & BLOCK DIAGRAMS
U22 GPIF38T2 OUTPUT4 (OPTICAL)
W1 B. IN-3P
D+5 2 2 3 1 1
J4
(NON)
DGND DGND D+5 U2E 74HC04 R55 3.3K R57 jumper 11 10 C55 0.1 U3E 74HC04 10 11 2 1 3
U52 GPIF38T2 OUTPUT7 (OPTICAL)
D+5
C2 C3 100/10 10/16
C4 10/16
C5 10/16
C6 0.1
C7 0.1
C8 0.1
C9
DGND D+5 R65 3.3K R67 jumper U2F 74HC04 13 12 C65 0.1 U3F 74HC04 12 13 2 1 3
U62 GPIF38T2 OUTPUT8 (OPTICAL)
DGND
DGND
DS-8
9
DS-8
DS-8
DS-8 Parts List
· MAIN PCB assy
Ref. No. Part No. Description 8274 2430 00 PCB Assy, Main, DS-8 8251 9661 01 Plain PCB, Main, DS-8 ICs Description DIP, DG, CMOS, 74HCU04 DIP, DG, CMOS, 74HC04 N/A Connector, opt, GPIF37R1 Connector, opt, GPIF38T2 DIODEs Description HT, DSK10C-BT Opt, V, LED, green, GLK3KG8 HT, 1SS136 HT, 1SS136 Ref. No. J002 J004 J005 J011, 012 L001, 002 L011, 021 L012, 022 L013, 023 L014, 024 S001 T011, 021 W003, 004 W401 Part No. Description 8245 2720 17 Connector, PI, jack, FPC, 17P N/A 8245 1711 03 Connector, PI, jack, 8283, 3P, WHT 8245 3130 01 Connector, PL, jack, RCA, 2P, BLK, WS N/A N/A N/A 8242 1860 13 Filter, T, EMI, LFW7B-M3R2T 8242 1860 13 Filter, T, EMI, LFW7B-M3R2T 8253 4610 01 Switch, P, push, power, SDDL 8242 2350 00 Transformer, digital out, K7-T Jumper, F5 8276 8396 05 Cable, flat, FFC, 17P, L50
3. EXPLODED VIEW, PCB ASSEMBLY AND PARTS LIST
DS-8 OVERALL EXPLODED VIEW & PARTS LIST
Ref. No. Part No. 1 8221 2230 00 2 3 4 5 6 7 8 9 8221 3090 00 8221 3100 00 8274 2450 00 8274 2440 00 8274 2430 00 8226 0130 02 8221 2220 00 8226 1870 02 Description Cover, DS-8/DP-8 Panel, dress, DS-8 Panel, rear, DS-8 PCB assy, SW, DS-8 PCB assy, Regulator, DS-8 PCB assy, MAIN, DS-8 Button, push, B, N08 Chassis, DS-8/DP-8 Knob, VR, W, N19 11 12 13 14 Ref. No. 10 Part No. 8270 7270 03 8270 7270 06 8270 7270 07 8270 7270 10 8226 0191 00 8216 6570 00 8276 8396 05 8216 6920 00 Description AC adaptor, AD-12A, 120V, USA/CND AC adaptor, AD-12A, 230V, EUR AC adaptor, AD-12A, 240V, UK AC adaptor, AD-12A, 100V, JPN Escutcheon, B Spacer, escutcheon Cable, flat, FFC, 17P, L50 (Included in MAIN PCB assy.) Sheet, volume, DS-8/DP-8
Ref. No. U001 U002, 003 U004 U011~061 U012~062
Part No. 8236 0074 01 8236 0812 00 8245 5530 10 8245 5520 10
Ref. No. D001 D002 D011, 021 D012, 022
Part No. 8234 0196 8234 0201 8234 5007 8234 5007
02 00 00 00
· REGULATOR PCB assy
Ref. No. Part No. Description 8274 2440 00 PCB Assy, Regulator, DS-8 8251 9660 02 Plain PCB, Regulator, DS-8
1
BBT 3x8 BZn
Ref. No. R001 R011, 021 R012, 022 R013, 023 R014, 024 R015~065 R016~066 R017~067 R018, 028
Part No. 8230 1384 8230 1387 8230 1381 8230 1384 8230 1382 8230 1383 8230 1382 8230 1387
RESISTORs Description 71 HT, Carbon, 1/4W, 470, 5% 50 HT, Carbon, 1/4W, 75, 5% 00 HT, Carbon, 1/4W, 10, 5% 73 HT, Carbon, 1/4W, 47k, 5% 22 HT, Carbon, 1/4W, 2.2k, 5% 32 HT, Carbon, 1/4W, 3.3k, 5% 22 HT, Carbon, 1/4W, 2.2k, 5% Jumper, F5 50 HT, Carbon, 1/4W, 75, 5%
Ref. No. Part No. Description U091 8236 0320 01 IC, 220, AN, regulator, NJM78M05FA C091, 092 8232 8181 04 Capacitor, VT, CER, 25V, 0.1µF, +80-20%, YF W001 8276 7730 10 Cable assy, 3P, WHTMT/F-MT/BS, L100 E101, 102 N/A
10 2
BBT 3x6 BZn
11 12 3
BBT 3x8 BZn BBT 3x8 BZn
Ref. No. C001 C002 C003~005 C006, 007 C008, 009 C011, 021 C012, 022 C013~063 C014, 024 C015~065 C016, 026 C017, 027
CAPACITORs ALU = Electrolytic type CER = Ceramic type Part No. Description 8232 1451 06 VT, ALU, 35V, 10µF, 20%, SME-VB 8232 1421 07 VT, ALU, 10V, 100µF, 20 %, SME-VB 8232 1431 06 VT, ALU, 16V, 10µF, 20 %, SME-VB 8232 8181 04 VT, CER, 25V, 0.1µF, +80-20%, YF N/A 8232 8012 20 VT, CER, 50V, 22pF, 5%, SL 8232 8014 70 VT, CER, 50V, 47pF, 5%, SL 8232 8181 04 VT, CER, 25V, 0.1µF, +80-20%, YF 8232 8181 04 VT, CER, 25V, 0.1µF, +80-20%, YF 8232 8181 04 VT, CER, 25V, 0.1µF, +80-20%, YF 8232 1443 36 VT, ALU, 25V, 33µF, 20 %, SME-VB 8232 1443 36 VT, ALU, 25V, 33µF, 20 %, SME-VB MISCELLANEOUS Part No. Description 8276 8730 02 Tube, UL, black, 1, L05 Jumper, F5 Jumper, F10 8245 5410 00 Connector, jack, DC inlet, YKB31-0012
· SW PCB assys
Ref. No. Part No. 8274 2450 00 8251 9660 03 Description PCB Assy, SW, DS-8 Plain PCB, SW, DS-8
4 13 5
BBT 3x6 BZn
BBT 3x6 BZn
BBT 3x6 BZn
Ref. No. Part No. Description S011~081 8253 4600 01 SW, P, rotary, 1-8, non-shortening, SRBV18 J003 8245 2721 17 Connector, PL, jack, FPC, 17P W002 N/A E101, 102 N/A
14
P 3x5 CZn
Ref. No. Y201 E201 E202 J001
Abbreviation DIP: Dual In Line H: Horizontal mount V: Vertical mount T: Taping device PI: Penetrate mount I form (straight) PL: Penetrate mount L form (right angle) DG: Digital
9 6
Attached to each pot.
8
P 3x5 CZn
7
8
5
IN4
IN3
IN5
IN6
IN1
IN2
IN7
C14
OUT1
U42 OUT6
J11 J12 C25 C35 C45 C15
R17 L21 R27 R37
U11 U41 U51
U21 U31
C24
U12 OUT3
U22 OUT4
U32 OUT5
U52 OUT7
D12
D22
C3
R11 L11
C13
R47
R56
R15 R16
C43
R45 R46
R57
R35
R25
R26
R36
C23
C33
R55
C53
D21 R21
L14
R28
L23
D11 R12
L24
C4
T11 T21
L12
W3
R24
C22 C21 R23
1
R22
C16
C26
C6
C17 C27
L13 L22 R18
J4
8
2 C7 C9 C8
8
8
8
U2
C5
U1
U4
J2
J5 1 C2
R14 C12 C11 R13
1 17 1
1
1
1
U3
U91 1
C92 W1 1
3
R66 R65
R67
C1
R1
8251966 001 MAIN,DP-8
C65 U62
IN8 OUT8
3
C69
3
C91
8251966 002
REGULATOR,DP-8
U61
D2
5 5 5 1 1 1 1 1 5 1
5
5 1
5 1
5
17
J3 1
W2
6 6 6 10 S31 10 S41 10 10 S21 6 10 S11 6 S51 10 6 S61 10 6 S71 10 6 S81
8251966 SW,DP-8
003
· Foil Side of MAIN / REGULATOR / SW PCB assys
S P J1
B
U52
OUT7 1 2 3 C55
U42
OUT6 1 2 3 C45
U32
OUT5 1 2 3 C35
U22
OUT4 1 2 3 C25
U12
OUT3 1 2 3 C15
OUT2 4
OUT1 J12 2 C14
U51
IN7 1 2 3 C24 3 1 C3
U41
IN6 1 2 3
U31
IN5 1 2 3
U21
IN4 1 2 3
U11
IN3 1 2 3
IN2 4
IN1 2
3 L11 D22 L21 R36 R35 R37 C33 R56 R55 R57 R46 R45 C53 R47 R26 R25 R17 R15 R16 C43 R27 C23 C13
1 D12
D2 R2
R11
D11 C16
R28
T21 L22 L12
T11
R22
C6 C17 C27 8 C8 U3 1 8 C9 8 U4 1 U1
R24 C22 C21 R23
8 U2 R14 C12 C11 R13 1 1 1 17
S1
POWER SW
D1
L1
L2
W4
J3
S81
W2
S71 6 10 6 10 6
S61 6 10
S51 6 10
S41 6 10
S31 6 10
S21 6 10
S11 10
1
5
1
5
1
5
1
5
1
5
1
5
1
5
1
5
17
1
6
DS-8
DS-8 PCB ASSEMBLIES
· Parts Side of MAIN / REGULATOR / SW PCB assys
J1 DC IN C55
J11
L24
L13
L23
L14
R18
C4
POWER SW S1
L1 W4 L2
W3 D1 1 C2 C1 3 R1 R67 R65 R66 C63 C65 D2 3 2 1 U62 OUT8 3 2 1 U61 IN8
C26 C7
R12 1 J4 2 C5
J2 J5 1 U91 C92 W1 1 3 3 C91
DS-8
7