Fostex PH-50 Service Manual Download Page 2

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 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:
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 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

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.

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.”

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 normally 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.

Summary of Contents for PH-50

Page 1: ...PH 50 1 PH 50 Service Manual Model HeadphoneAmpDistributor...

Page 2: ...on 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...

Page 3: ...50 The following accessories are supplied with PH 50 as the standard accessories Owner s manual 8288384000 for export model Owner s manual 8288385000 for domestic model Following is the packing materi...

Page 4: ...or less DIN AUDIO OUTPUT VR MIN 80dBV or less IHF A OUTPUT VR MIN Distortion 0 1 or less 32 load 1kHz 200 mW CASCADE OUT Connector RCA pin Output level 10dBV 3dB INPUT VR CAL Frequency Response 30 20...

Page 5: ...ND T 2 R S 3 1 9 10 11 12 13 14 15 9 Channel input jacks CHANNEL IN 1 5 10 Balanced input connector XLR INPUT 11 Cascade output jack CASCADE OUT 12 Unbalanced input jack INPUT 13 AUX input jacks AUX I...

Page 6: ...AC JPN 5 8207000208 BUSHING SR 4N 4 6 8218775001 INSULATION SHEET PH 50 7 8228775002 INSULATION SHEET B PH 50 3 EXPLODED VIEW PCB ASSEMBLY AND PARTS LIST PH 50 OVERALL EXPLODED VIEW PARTS LIST Ref No...

Page 7: ...30111568 H METAL 5 6 5 R119 519 8230138332 HT CARBON 1 4W 3 3K 5 R150 550 8230138393 HT CARBON 1 4W 39K 5 R151 551 8230138393 HT CARBON 1 4W 39K 5 R152 552 8230138104 HT CARBON 1 4W 100K 5 R153 553 82...

Page 8: ...8232804104 CER 25V 0 1 F 80 20 YF C614 664 8232144226 ALU 25V 22 F 20 SME VB C615 665 8232050100 CER 50V 10PF 5PF SL C617 667 8232144226 ALU 25V 22 F 20 SME VB C620 8232153225 ALU 50V 2 2 F 20 BP SME...

Page 9: ...PH 50 9 PH 50 PCB PATTERN DRAWING...

Page 10: ...22u 6 J604D RCA 4P 2 3 1 J651 HTJ064 1 2 3 J652 CANNON 10dBV BAL IN L 4dBu 10dBV C651 25V 22u R655 100k R701 100k C701 25V 22u C664 25V 22u 7 8 J701 RCA 6P R667 39k AUX IN R 10dBV 10dBV CHANNEL IN 1...

Page 11: ...PH 50 11 BLOCK DIAGRAM...

Page 12: ...12 PH 50 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 JUNE 1998 8288774000...

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