Fostex-PH50-pad-sm维修电路原理图.pdf

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1、PH-50 1 PH-50 Service Manual Model Headphone Amp Distributor RadioFans.CN 收音机爱 好者资料库 2 PH-50 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 reta

2、ined 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

3、, 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 fo

4、rce, 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 inter

5、fere 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 open

6、ings. 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 o

7、r 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 plac

8、ed 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 unplug

9、ged 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 w

10、hen: A. B. C. D. E. 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 O

11、PEN 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 VITER LES CHOCS LECTRIQUES, INTRODUIRE LA LAME LA PLUS LARGE DE LA FICHE DANS LA BORNE CORRE- SPOND

12、ANTE 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

13、arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated “dangerous voltage” within the products 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

14、SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOIS- TURE.” 1. 2. 3. 4. 5. 6. 7. 8. The power supply cord or the plug has been damaged; or 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 normal

15、ly or exhibits a marked changed in performance; or The appliance has been dropped, or the enclosure damaged. 9. 10. 11. 12. 13. 14. 15. 16. 17. RadioFans.CN 收音机爱 好者资料库 PH-50 3 TABLE OF CONTENTS 1. SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2. CONTROL

16、S, INDICATORS AND CONNECTORS . . . . . . . . . . . . 3. EXPLODED VIEW, PCB ASSEMBLY AND PARTS LIST . . . . . . 4. CIRCUIT & BLOCK DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . NOTES *Parts List and circuit diagrams are given in this manual to assist the service technician in maintaining t

17、he Model PH-50. *The following accessories are supplied with PH-50 as the standard accessories. Owners manual: 8288384000 (for export model) Owners manual: 8288385000 (for domestic model) *Following is the packing material for the Model PH-50. PACKING SIDE A PH-50 : 8228445000 CARTON BOX PH-50: 8228

18、721000 4 5 6 10 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. RadioFans.CN 收音机爱 好者资料库 4 PH-50 1. SPECIFICATIONS INPUT SECTION INPUT (Balanced) ConnectorXLR ( Hot

19、 : Pin 2 ) / Stereo phone ( Hot : tip ) Input level+4dBu / -10dBV(switchable) Impedance10 k or more INPUT (Unbalanced) ConnectorRCA pin Input level-10dBV Impedance10 k or more CHANNEL INPUT ConnectorRCA pin Input level-10dBV Impedance10 k or more AUX INPUT ConnectorRCA pin level-10dBV Impedance10 k

20、or more OUTPUT SECTION PHONES 1-5 ConnectorStereo phone Max. Output Level500 mW or more ( 32 load, Distortion 3.0 % or less ) Load Impedance8 32 Frequency Response30 20 kHz 2dB ( 32 load, 1kHz, 200 mW ) S/N-65dBV or less (DIN AUDIO, OUTPUT VR : MIN) -80dBV or less ( IHF-A, OUTPUT VR : MIN) Distortio

21、n0.1 % or less ( 32 load, 1kHz, 200 mW ) CASCADE OUT ConnectorRCA pin Output level-10dBV 3dB (INPUT VR : CAL ) Frequency Response30 20 kHz 1dB S/N-85dBV or less (DIN AUDIO, OUTPUT VR : MIN) -90dBV or less ( IHF-A, OUTPUT VR : MIN) Distortion0.05 % or less ( 1kHz, -10dBV ) Click Noise (Power on / off

22、)-20dBVp-p or less (OUTPUT VR : MIN) Shock Noise-40dBVp-p or less (Measure noise level when one side of appliance is dropped 3 times from 5 cm height.) Peak LED Indication+7dBV 3dB GENERAL Dimensions 210 (W) 200 (D) 43 (H) mm Weight1.9 kg Power supply JPN100 VAC, 50/60 Hz USA/CND120 VAC, 60 Hz EUR/U

23、K230 VAC, 50/60 Hz Power consumption8 W *Specifications and appearance are subject to change without notice for product improvement. RadioFans.CN 收音机爱 好者资料库 PH-50 5 2. CONTROLS, INDICATORS & CONNECTORS PH-50 HEADPHONE AMP DISTRIBUTOR PEAK CAL PHONES AUX IN INPUT MONOST POWER 5 100 34521 5 100 5 100

24、5 100 5 100 5 100 5 100 1234 5678 12345 LRLRL/MONOR CASCADE OUTINPUTAUX IN (-10dBV)(-10dBV) (-10dBV) CHANNEL IN(-10dBV) +4dBu-10dBV LR RL INPUT (+4dBu/-10dBV) PHONEXLR HOT COLD GND T2 R S 3 1 910 1112131415 9. Channel input jacks CHANNEL IN 1-5 10. Balanced input connector (XLR) INPUT 11. Cascade ou

25、tput jack CASCADE OUT 12. Unbalanced input jack INPUT 13. AUX input jacks AUX IN 14. Balanced input level selector switch -4dBu/-10dBV 15. Balanced input connector (Stereo phone) INPUT 1. Headphone output level control knob PHONES 1-5 2. AUX input level control knob AUX IN 3. Peak LED PEAK 4. Power

26、LED POWER 5. Headphone jacks PHONES 1-5 6. Input image position selector switch ST/MONO 7. Input master level control knob INPUT 8. Power switch POWER RadioFans.CN 收音机爱 好者资料库 6 PH-50 BBT 3x6 BZn B 3x6 CZn BBT 3x8 BZn BBT 3x8 BZn BBT 3x6 BZn BBT 3x8 BZn BBT 3x6 BZn BBT 3x6 BZn BBT 3x6 BZn BBT 3x6 BZn

27、 Ref. No.Part No.Description 18221262000CASE, COVER, PH-50 28221264000PANEL, FRONT, PH-50 38274174000PCB Assy, MAIN, PH-50 48650800000CORD, AC, USA/CND 8650801000CORD, AC, EUR 8650802000CORD, AC, UK 8650803000CORD, AC, JPN 58207000208BUSHING, SR-4N-4 68218775001INSULATION SHEET, PH-50 78228775002INS

28、ULATION SHEET B, PH-50 3. EXPLODED VIEW, PCB ASSEMBLY AND PARTS LIST PH-50 OVERALL EXPLODED VIEW & PARTS LIST Ref. No.Part No.Description 88274175000PCB Assy, VR, PH-50 98226198003ROTARY, KNOB(C), G 108226198001ROTARY, KNOB(A), R 118242256003TRANS, POWER, 120V 8242256006TRANS, POWER, 230V 8242256010

29、TRANS, POWER, 100V 128221263000CHASSIS, MAIN, PH-50 138253014007SW, WL, PUSH, POWER, SDDLB-SPST 148207000318PLASTY-FOOT, 3725 158226228000BUTTON, PUSH, POWER RadioFans.CN 收音机爱 好者资料库 PH-50 7 PH-50 Parts List MAIN/VR PCBs ICs Ref. No.Part No.Description U101501 8236035803IC, PC4570HA U102502 823604600

30、0IC, NJM386BD U152552 8236046000IC, NJM386BD U6018236035803IC, PC4570HA U6028236035803IC, PC4570HA U6058236035803IC, PC4570HA U6518236035803IC, PC4570HA U7018236035803IC, PC4570HA U8018236032005IC, REGULATOR, NJM78M12FA U8028236034705IC, REGULATOR, 79M12FA TRANSISTORs Ref. No.Part No.Description Q60

31、18234108900TR, 2SD1858, QR, T Q6028234108900TR, 2SD1858, QR, T Q6038234108800TR, 2SB1237, PQR, T Q6048234108900TR, 2SD1858, QR, T Q8018234107600TR, 2SC4549, NEC DIODEs Ref. No.Part No.Description D6018234106500OPT, LED, RT3-222HCS D6028234500700D, HT,1SS136 D6038234500700D, HT, 1SS136 D7518234500700

32、D, HT, 1SS136 D7528234106500OPT, LED, RT3-222HCS D7538234500700D, HT, 1SS136 D7548234500700D, HT, 1SS136 D8018234108700D, RB151 D8028234106500OPT, LED, RT3-222HCS RESISTORs Ref. No.Part No.Description R101501 8240284001VR, RK09K120A1NA, 5KA x 2 R110510 8230138393HT, CARBON, 1/4W, 39K, 5% R111511 823

33、0138393HT, CARBON, 1/4W, 39K, 5% R112512 8230138104HT, CARBON, 1/4W, 100K, 5% R113513 8230138332HT, CARBON, 1/4W, 3.3K, 5% R114514 8230138332HT, CARBON, 1/4W, 3.3K, 5% R115515 8230138332HT, CARBON, 1/4W, 3.3K, 5% R116516 8230138103HT, CARBON, 1/4W, 10K, 5% R117517 8230138100HT, CARBON, 1/4W, 10, 5%

34、R118518 8230111568H, METAL, 5.6, 5% R119519 8230138332HT, CARBON, 1/4W, 3.3K, 5% R150550 8230138393HT, CARBON, 1/4W, 39K, 5% R151551 8230138393HT, CARBON, 1/4W, 39K, 5% R152552 8230138104HT, CARBON, 1/4W, 100K, 5% R153553 8230138332HT, CARBON, 1/4W, 3.3K, 5% R154554 8230138332HT, CARBON, 1/4W, 3.3K,

35、 5% R155555 8230138332HT, CARBON, 1/4W, 3.3K, 5% R156556 8230138103HT, CARBON, 1/4W, 10K, 5% R157557 8230138100HT, CARBON, 1/4W, 10, 5% R158558 8230111568H, METAL, 5.6, 5% R159559 8230138332HT, CARBON, 1/4W, 3.3K, 5% R601, 6028240284001VR, RK09K120A1NA, 5KA x 2 R610, 6508230138104HT, CARBON, 1/4W, 1

36、00K, 5% R611, 6518230138103HT,CARBON, 1/4W, 10K, 5% R612, 6528230138103HT, CARBON, 1/4W, 10K, 5% R613, 6538230138103HT, CARBON, 1/4W, 10K, 5% R614, 6548230138103HT, CARBON, 1/4W, 10K, 5% R615, 6558230138104HT, CARBON, 1/4W, 100K, 5% R616, 6568230138104HT, CARBON, 1/4W, 100K, 5% R617, 6578230138103HT

37、, CARBON, 1/4W, 10K, 5% R618, 6588230138103HT, CARBON, 1/4W, 10K, 5% R619, 6598230138822HT, CARBON, 1/4W, 8.2K, 5% R620, 6608230138822HT, CARBON, 1/4W, 8.2K, 5% R621, 6618230138822HT, CARBON, 1/4W, 8.2K, 5% R622, 6628230138822HT, CARBON, 1/4W, 8.2K, 5% R623, 6638230138103HT, CARBON, 1/4W, 10K, 5% R6

38、24, 6648230138103HT, CARBON, 1/4W, 10K, 5% R625, 6658230138102HT, CARBON, 1/4W, 1K, 5% R626, 6668230138104HT, CARBON, 1/4W, 100K, 5% R627, 6678230138393HT, CARBON, 1/4W, 39K, 5% R628, 6688230138393HT, CARBON, 1/4W, 39K, 5% R629, 6698230138332HT, CARBON, 1/4W, 3.3K, 5% R630, 6708230138103HT, CARBON,

39、1/4W, 10K, 5% R631, 6718230138103HT, CARBON, 1/4W, 10K, 5% R632, 6728230138393HT, CARBON, 1/4W, 39K, 5% R633, 6738230138101HT, CARBON, 1/4W, 100, 5% RadioFans.CN 收音机爱 好者资料库 8 PH-50 CAPACITORs ALU = Electrolytic CER = Ceramic type PES = Mylar type Ref. No.Part No.Description C101501 8232050100CER, 50

40、V, 10PF, +-.5PF, SL C102502 8232804104CER, 25V, 0.1F, +80-20%, YF C103503 8232901102PES, 50V, 0.001F, 5%, AMZV C104504 8232143337ALU, 16V, 330F, 20%, SME-VB C105505 8232142476ALU, 10V, 47F, 20%, SME-VB C1078232804104CER, 25V, 0.1F, +80-20%, YF C1088232804104CER, 25V, 0.1F, +80-20%, YF C109509 823290

41、1473PES, 50V, 0.047F, 5%, AMZV C151551 8232050100CER, 50V, 10PF, +-.5PF, SL C153553 8232901102PES, 50V, 0.001F, 5%, AMZV C154554 8232143337ALU, 16V, 330F, 20%, SME-VB C155555 8232142476ALU, 10V, 47F, 20%, SME-VB C159559 8232901473PES, 50V, 0.047F, 5%, AMZV C3078232804104CER, 25V, 0.1F, +80-20%, YF C

42、3088232804104CER, 25V, 0.1F, +80-20%, YF C601, 651 8232144226ALU, 25V, 22F, 20%, SME-VB C602, 6528232144226ALU, 25V, 22F, 20%, SME-VB C603, 653 8232144226ALU, 25V, 22F, 20%, SME-VB C604, 6548232050101CER, 50V, 100PF, 5%, SL C605, 6558232050101CER, 50V, 100PF, 5%, SL C606, 6568232804104CER, 25V, 0.1F

43、, +80-20%, YF C607, 6578232144226ALU, 25V, 22F, 20%, SME-VB C608, 6588232050100CER, 50V, 10PF, +-.5PF, SL C610, 6608232144226ALU, 25V, 22F, 20%, SME-VB C611, 6618232050100CER, 50V, 10PF, +-.5PF, SL C612, 6628232804104CER, 25V, 0.1F, +80-20%, YF C614, 6648232144226ALU, 25V, 22F, 20%, SME-VB C615, 665

44、8232050100CER, 50V, 10PF, +-.5PF, SL C617, 6678232144226ALU, 25V, 22F, 20%, SME-VB C6208232153225ALU, 50V, 2.2F, 20%, BP, SME-VB C6218232146225ALU, 50V, 2.2F, 20%, SME-VB C6228232146225ALU, 50V, 2.2F, 20%, SME-VB C701705 8232144226ALU, 25V, 22F, 20%, SME-VB C751753 8232804104CER, 25V, 0.1F, +80-20%,

45、 YF C8018232096108ALU, 25V, 1000F, 20%, SME-VB C8028232096338ALU, 25V, 3300F, 20%, SME C8038232096108ALU, 25V, 1000F, 20%, SME-VB C8048232804104CER, 25V, 0.1F, +80-20%, YF C8058232804104CER, 25V, 0.1F, +80-20%, YF C8068232144226ALU, 25V, 22F, 20%, SME-VB C8078232144226ALU, 25V, 22F, 20%, SME-VB C808

46、8232901473PES, 50V, 0.047F, 5%, AMZV C8098232901473PES, 50V, 0.047F, 5%, AMZV C8108232096108ALU, 25V, 1000F, 20%, SME-VB MISCELLANEOUS Ref. No.Part No.Description CN8038745503003CONN, XH 3P (87003048) J1016018245337000CONN, PHONE JACK, STEREO J6028245268002CONN, PL, JACK, XLR31, NC3FAH2 J60382453110

47、04CONN, RCA, 4P, YKC21-3084 J6518245337000CONN, PHONE JACK, STEREO J6528245268002CONN, PL, JACK, XLR31, NC3FAH2 J7018245311006CONN, RCA, 6P, YKC21-3154 J7068245311001CONN, RCA, 1P, YKB11-0273 S6018253467000SW, SS010-P022MAM-PA9 S6028253467000SW, SS010-P022MAM-PA9 W6018277473001CORD, SCN-SCN, 8P x 20

48、0 W6028277473001CORD, SCN-SCN, 8P x 200 W6038277473002CORD, SCN-SCN,10P x 200 8207012800HEATSINK, PC1115-25 RadioFans.CN 收音机爱 好者资料库 PH-50 9 PH-50 PCB PATTERN DRAWING RadioFans.CN 收音机爱 好者资料库 10 PH-50 4. CIRCUIT & BLOCK DIAGRAMS +B1 R117 10 R118 5.6 C107 0.1u 2 3 1 J101 HTJ064 PHONES OUT 1 R119 3.3k R

49、159 3.3k C104 16V/330u C109 0.047u G 1 - 2 + 3 E 4 O5 B6 P7 G28 U102 386B G 1 - 2 + 3 E 4 O 5 B 6 P 7 G2 8 U152 386B R116 10k C103 0.001u C153 0.001u C105 10v/47u R156 10k R154 3.3k R115 3.3k R114 3.3k C10110p +B2 -B2 R112100k R113 3.3k C102 0.1u 1 5 2 4 3 U101A 4570A R110 39k R111 39k +B2 R752 27k R753 27k R751 220k 9 8 6 7 U605B 4570A D751 1SS133 D754 1SS133 D753 1SS133 R754 100k R755 4.7k R759 4.7k D752 L-934ID-5V D802 L-934ID-5V +B2 +B2 -B2 -B2 C751 0.1u R756 4.7k R757 100 R758 0 C753 0.1u 1 5 2 4 3 U605A 4570A C608 10p C61110p R624 10k C605 1