Pioneer HTP-305-SW Service manual

Service

HTP305-SW

Manual

POWERED SUBWOOFER

HTP305-SW

KUCXC

ORDER NO.

PET99020

CONTENTS

1. SAFETY INFORMATION .............................................. 2

2. DISASSEMBLY ..............................................................3

3. PACKING, EXPLODED VIEWS AND PARTS LIST .......3

4. SCHEMATIC AND PCB CONNECTION DIAGRAMS ....6

5. PCB PARTS LIST ..........................................................8

6. PANEL FACILITIES........................................................9

7. SPECIFICATIONS .......................................................10

PIONEER CORPORATION 4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8655, Japan

PIONEER ELECTRONICS SERVICE, INC. P.O.Box 1760, Long Beach, CA 90801-1760, U.S.A.

© PIONEER CORPORATION 1999

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HTP305-SW

1. SAFETY INFORMATION

This service manual is intended for qualified service technicians; it is not meant for the casual do-it­yourselfer. Qualified technicians have the necessary test equipment and tools, and have been trained to
properly and safely repair complex products such as those covered by this manual.
Improperly preformed repairs can adversely affect the safety and reliability of the product and may void
the warranty. If you are not a qualified to perform the repair of this product properly and safely, you
should not risk trying to do so and refer the repair to a qualified service technician.

WARNING
Lead in solder used in this product is listed by the California Health and Welfare agency as a known reproductive
toxicant which may cause birth defects or other reproductive harm (California Health & Safety Code, Section

25249.5). When servicing or handling circuit boards and other components which contain lead in solder, avoid
unprotected skin contact with the solder. Also, when soldering do not inhale any smoke or fumes produced.

NOTICE
(FOR CANADIAN MODEL ONLY)

Fuse symbols (fast operating fuse) and/or (slow operating fuse) on PCB indicate that replacement
parts must be of identical designation.

REMARQUE
(POUR MODÈLE CANADIEN SEULEMENT)

Les symboles de fusible (fusible de type rapide) et/ou (fusible de type lent) sur CCI indiquent que
les pièces de remplacement doivent avoir la même désignation.

(FOR USA MODEL ONLY)

1. SAFETY PRECAUTIONS

The following check should be performed for the
continued protection of the customer and service
technician.

LEAKAGE CURRENT CHECK

Measure leakage current to a know earth ground
(water pipe, conduit, etc.) by connecting a leakage
current tester such as Simpson Model 229-2 or
equivalent between the earth ground and all exposed
metal parts of the appliance (input/output terminals,
screwheads, metal overlays, control shaft, etc.). Plug
the AC line cord of the appliance directly into a 120V
AC 60Hz outlet and turn the AC power switch on. Any
current measured must no exceed 0.5mA.

Reading should
not be above

Device
under
test

Test all
exposed metal
surfaces

Leakage
current
tester

+

0.5mA

-

ANY MEASUREMENT NOT WITHIN THE LIMITS
OUTLINED ABOVE ARE INDICATIVE OF A
POTENTIAL SHOCK HAZARD AND MUST BE
CORRECTED BEFORE RERTURNING THE
APPLIANCE TO THE CUSTOMER.

2. PRODUCT SAFETY NOTICE

Many electrical and mechanical parts in the appliance
have special safety related characteristic. These are
often not evident from visual inspection nor the
protection afforded by them necessarily can be
obtained by using replacement components rated for
voltage, wattage, etc. Replacement parts which have
these special safety characteristics are identified in
this Service Manual.

Electrical components having such features are
identified by marking with a D on the schematics and
on the parts list in this Service Manual.

The use of a substitute replacement component which
dose not have the same safety characteristics as the
PIONEER recommended replacement one, shown in
the parts list in this Service Manual, may create sock,
fire, or other hazards.

Also test with
plug reversed
(Using AC adapter
plug as required)

AC Leakage Test

Earth
ground

Product Safety is continuously under review and new
instructions are issued from time to time. For the latest
information, always consult the current PIONEER
Service Manual. A subscription to, or additional copies
of, PIONEER Service Manual may be obtained at a
nominal charge from PIONEER.

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2. DISASSEMBLY

HTP305-SW

●

POWER AMP SECTION

• Remove the 12 screws from the power amplifier.

• Remove the polyswitch assembly.

• Remove the connector lead, etc.

●

GRILLE SECTION

• The grill is attached to the cabinet by its bosses applied
with adhesive. To detach it, pry it open by inserting a flate
blad screwdriver between the cabinet and the grille.

●

SPEAKER

• Remove each of the 4 screws.

3. PACKING, EXPLODED VIEWS AND PARTS LIST

NOTES:

●

Parts marked by "NSP" are generally unavailable because they are not in our Master Spare Parts List.

●

The mark found on some component parts indicates the importance of the safety factor of the part. Therefore, when r eplacing, be sure to use
parts of identical designation.

●

Parts marked by " " are not always kept in stock. Their delivery time may be longer than usual or they may be unavailable.

3.1 PACKING

Parts List

Mark Description Parts No.

Operating Instructions 268206
RCA Cable Accessory Pack 255245
Corner Pad Assy 264333
Poly Bag 266953
Packing Case 267218

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HTP305-SW

3.2 EXTERIOR SECTION

Parts List

Mark No. Description Parts No.

NSP 1 Cabinet Enclosure 264506
NSP 2 Amplifier Assembly 264571

3 Grille Assembly 264353
NSP 4 Paper Port Tube 256946
NSP 5 Front Port Ring 254306

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Mark No. Description Parts No.

NSP 6 Rear Port Ring 254346
NSP 7 Label FTC Sticker 268286
NSP 8 UL-CUL Label 268197

9

1

9 Transducer 264724

10 Screw (for Amplifier and Trans) 221904

8

2

10

456

7

Fig. 1 HTP305-SW

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