Pioneer HTP-702 User manual

HTP702-SW, HTP202/302-SW
1
PIONEER ELECTRONIC CORPORATION 4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8655, Japan
PIONEER ELECTRONICS SERVICE, INC. P.O.Box 1760, Long Beach, CA90801-1760, U.S.A.
© PIONEER ELECTRONIC CORPORATION 1999
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODELS.
Type Model
HTP702-SW Power Requirement Remarks
AC120V
HTP202/302-SW
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
Service
Manual
ORDER NO.
PET99001
POWERED SUBWOOFER
HTP702-SW
HTP202/302-SWHTP202/302-SW
HTP202/302-SWHTP202/302-SW
HTP202/302-SW
OO

HTP702-SW, HTP202/302-SW
2
This service manual is intended for qualified service technicians; it is not meant for the casual do-it-
yourselfer. 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.
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.
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.
+ -
Reading should
not be above
0.5mA
Leakage
current
tester
Device
under
test
Test all
exposed metal
surfaces
Earth
ground
Also test with
plug reversed
(Using AC adapter
plug as required)
AC Leakage Test
1. SAFETY INFORMATION

HTP702-SW, HTP202/302-SW
3
●POWER AMP SECTION
• Remove the 8 screws from the power amplifier.
• Remove the polyswitch assembly.
• Remove the connector lead, etc.
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 replacing, 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.
●PLASTIC FOOT SECTION
• Remove each of the 4 screws.
●SPEAKER
• Remove each of the 4 screws.
3.1 PACKING
Parts List
Mark No. Description Parts No.
1 Operating Instructions 256055
2 RCA Cable Accessory Pack 255245
3 Corner Pad Assy Bottom (HTP702-SW) 255349
3 Corner Pad Assy Bottom (HTP202/302-SW) 255052
4 Corner Pad Assy Top (HTP702-SW) 256878
4 Corner Pad Assy Top (HTP202/302-SW) 256124
5 Poly Bag (HTP702-SW) 255354
5 Poly Bag (HTP202/302-SW) 255067
6 Packing Case (HTP702-SW) 255334
6 Packing Case (HTP202/302-SW) 255230 5
6
1
4
2
3
2. DISASSEMBLY

HTP702-SW, HTP202/302-SW
4
3.2 EXTERIOR SECTION
Parts List
13 4 3
16 5 7 10 11
9 2 8
12
NSP 1 Cabinet Enclosure (HTP702-SW) 255394
NSP 1 Cabinet Enclosure (HTP202/302-SW) 255285
NSP 2 Amplifier Assy 254797
NSP 3 Logo 255101
4 Foot 255116
NSP 5 Port Tube, Paper 255136
NSP 6 Front Port Ring 254306
NSP 7 Rear Port Ring 254346
NSP 8 Label FTC Sticker 258942
NSP 9 UL-CUL Label 255270
10 Polyswitch Assembly 255498
11 Speaker (HTP702-SW) 25-58A/XL
11 Speaker (HTP202/302-SW) 20-208A/XL
12 Screw (for Amplifier & Speaker) 221904
13 Screw (for Foot) 222539
Mark No. Description Parts No.

HTP702-SW, HTP202/302-SW
5
3.3 POWER AMP SECTION
Parts List
Mark No. Description Parts No. Mark No. Description Parts No.
1 2P Cord 044899
2 AC Cord 046947
3 BRKT PCB C 077876
NSP Cushion Gasket 078786
4 Cushion Stopper 078519
5 Deco Sheet (Large) 043143
6 Deco Sheet (Small) 084846
7 Heatsink Sub 045576
8 Knob 072992
NSP Label Caution 084934
Cable Tie 080558
9 Mold Case 080336
Mold RCA Cap 080250
10 Panel Rear Assy 043163
NSP 11 Power Amp PCB Section 084541
12 Screw (3X10 BL) 075640
13 Screw (4X10 BL) 075659
14 Screw (M3X8 ZC) 075273
15 Tr 2SA1635 (Q611, Q615) 084680
16 Tr 2SC4008 (Q610, Q614) 084682
17 Trans Power 084759
41
2
3
6
5
7
8
11
10
912
13
14
17
16
15
13
12
12
12

HTP702-SW, HTP202/302-SW
6
4. SCHEMATIC AND PCB CONNTCTION DIAGRAMS
NOTE FOR SCHEMATIC DIAGRAMS (Type 1A)
1. When ordering service parts, be sure to refer to
"PARTS LIST of EXPLODED VIEWS" or "PCB
PARTS LIST".
2. Since these are basic circuits, some parts of them or the
values of some components may be changed for improve-
ment.
3. RESISTORS:
Unit: k:kΩ, M:MΩ, or Ωunless otherwise noted.
Rated power: 1/4W, 1/6W, 1/8W, 1/10W unless otherwise
noted.
Tolerance: (F): ±1%, (G): ±2%, (K): ±10%, (M): ±20% or ±5% un-
less otherwise noted.
4. CAPACITORS:
Unit: p:pF or µF unless otherwise noted.
Ratings: capacitor (µF)/voltage(V) unless othrewise noted.
Rated voltage: 50V except for electrolytic capacitors.
5. COILS:
Unit: m:mH or µH unless otherwise noted.
6. VOLTAGE AND CURRENT:
: Signal voltage at rated output.
or ←V:
DC voltage (V) at no input signal unless otherwise noted.
Value in ( ) is DC voltage at rated power.
mA or ←mA:
DC current at no input signal unless otherwise noted.
7. OTHERS:
• or : Adjusting point.
• : Measurement point.
• The mark found on some component parts indicates the im-
portance of the safety factor of the parts. Therefore, when re-
placing, be sure to use parts of identical designation.
8. SCH-&ON THE SCHEMATIC DIAGRAM:
• SCH-&indicates the drawing number of the schematic dia
gram. (SCH stands for schematic diagram.)
9. SWITCHES (Underline indicates switch position):
• MAIN + CONT. ASSY
S501 : PHASE Rev / Norm
S502 : AUTO POWER ON/OFF
V
NOTE FOR PCB DIAGRAMS
1. Partnumbers in PCB diagrams match those in the schematic
diagrams.
2. A comparison between the main parts of PCB and schematic
diagrams is shown below.

HTP702-SW, HTP202/302-SW
7
1
2
from
BC602
Polyswitch Assy (255498)
(RXE135)
Woofer
4Ω
4.1 CIRCUIT DIAGRAM

HTP702-SW, HTP202/302-SW
8
5. PCB 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 replacing, 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.
■PCB PARTS LIST (HTP702-SW, HTP202/302-SW)
POWER AMP PCB SECTION
SEMICONDUCTORS
Mark No. Description
Part No. Mark No. Description Part No.
IC551, IC552, IC553 IC NJM4558D 070140
Q609 Tr 2SA954 LM 068579
Q605 Tr 2SA1174 FP T 068608
Q510, Q601, Q602, Q603 Tr 2SA1175 KEF T 068611
Q608 Tr 2SC2003 LM 068754
Q606, Q612 Tr 2SC2784 EF T 068804
Q604, Q617, Q618, Q619, Tr 2SC2785 KEF T 068806
Q620
Q607 Tr 2SC4038 R TL2 068874
Q613, Q616 Tr DTA124ESA T 069250
Q509, Q511, Q512, Q513 Tr DTC124ESA T 069297
D604 ZD MTZ J 3.9B T 069069
D803, D804 ZD MTZ15B T 069184
D551, D552, D558, D560, D 1SS133 T-77 069460
D602, D603, D606, D802
D801 D RS405L-B41 069605
D553 LED BL-B5134 RED 069823
CAPACITORS
C601 Film 50V 124K T 065026
C559 Film 50V 333J T 065092
C556, C557 Film 50V 473J T 065118
C611 Film 50V 473K T 065123
C558 Film 50V 683J T 065141
C605 Ceramic 50V 102K T 065385
C552, C553 Ceramic 50V 221K T 065404
C603 Ceramic 50V 222K T 065407
C560, C562, C609, C610, Ceramic 50V 103Z T 065452
C612
C805 Ceramic 50V 223Z T 065457
C604 Ceramic 500V 101K 065699
C606, C607 Ceramic 500V 181K 065732
C551, C554, C555, C561, Electrolyc 35V 100M T 066288
C563, C613
C617 Electrolyc 6.3V 101M T 066296
C571, C602 Electrolyc 50V 108M T 066329
C568, C608 Electrolyc 25V 220M T 066347
C616 Electrolyc 35V 220M T 066350
C569 Electrolyc 16V 221M T 066361
C803, C804 Electrolyc 16V 470M T 066424
C570 Electrolyc 25V 470M T 066428
C801, C802 Electrolyc 40V 472M D18 084663
RESISTORS
JA, JPLR, R569, R570 MetalR 16Z 0 T26A 067057
R614 CarbonR H 1/6W 101J T 067065
R577, R583, R613, R624, CarbonR H 1/6W 102J T 067069
R625, R633
R555, R556, R557, R575, CarbonR H 1/6W 103J T 067074
R626, R628, R634, R643,
R644
R553, R640, R641 CarbonR H 1/6W 104J T 067079
R578 CarbonR H 1/6W 105J T 067083
R559 CarbonR H 1/6W 134J T 067106
R582 CarbonR H 1/6W 153J T 067119
R605, R606, R607 CarbonR H 1/6W 181J T 067129
R603 CarbonR H 1/6W 182J T 067132
R587 CarbonR H 1/6W 222J T 067155
R551, R586, R627, R632 CarbonR H 1/6W 223J T 067160
R579 CarbonR H 1/6W 224J T 067163
R610 CarbonR H 1/6W 271J T 067175
R612 CarbonR H 1/6W 272J T 067179
R562, R563, R581 CarbonR H 1/6W 333J T 067207
R609 CarbonR H 1/6W 392J T 067223
R554 CarbonR H 1/6W 393J T 067225
R601, R604, R608 CarbonR H 1/6W 472J T 067243
R602, R623 CarbonR H 1/6W 473J T 067248
R576 CarbonR H 1/6W 474J T 067252
R635 CarbonR H 1/6W 562J T 067269
R561 CarbonR H 1/6W 683J T 067297
R617 CarbonR FS 1/4W 100J 067381
R616, R619, R620 CarbonR FS 1/4W 100J S 067384
R630 CarbonR FS 1/4W 100J S 067384
R638, R639 CarbonR FS 1/4W 151T S 067407
R803 CarbonR FS 1/4W 331J S 067439
R611, R615 CarbonR FS 1/4W 470J S 067450
R621, R622, R636, R637 MetalR RSF 1W 229J S 068010
R801, R802 MetalR RSF 2W 561J 068053
VR551 VR 10kW A 084709
OTHERS
Misc 064821
Fuse Socket 074193
F801 Fuse 250V 2A 075066
Screw (3X10 BL) 075640
CN551 7P Cord 077057
CN802 3P Cord 077589
BC801 3P Connector 081465
BC501 7P Connector 081533
BC602 2P Connector 081661
JK551 2P RCA Jack 084749
PCB 6319-20 084960

HTP702-SW, HTP202/302-SW
9
REAR SECTION
1POWER indicator
Illuminates RED when the power is being supplied.
2Subwoofer LEVEL knob
Volume of subwoofer is adjusted with this knob. Turn this
knob clockwise to raise the level.
÷Starting with “MIN“, turn this knob and raise the volume
slowly. If the unit is turned on with the volume set too high,
it could cause hearing and/or speaker damage. Do not
turn the volume up excessively high. The low frequency
sound is apt to be raised too high since it is less disturbing
and harder to detect than high frequencies. Caution must
be taken here since the amplifier and speaker of the
HTP702-SW, HTP202/302-SW will be clipped when the
output of the amplifier or receiver is increased with the
subwoofer level set to “MAX“.
3Subwoofer input terminal
(LINE LEVEL INPUT)
Connect SUBWOOFER OUTPUT terminal of the receiver to
this terminal with the accessory RCA cord.
4Subwoofer output terminal
(LINE LEVEL OUTPUT)
Used for connecting an additional subwoofer to the system.
Connect this terminal to the SUBWOOFER INPUT terminal
of another subwoofer.
If the output of the receiver connected to this unit is high
or if the output has a low range boosted by the Bass con-
trol,Bass boost, or othermeans, there may besomesound
distortion even if the level of the unit is lowered. In this
case, lower the output level (Volume, Bass control, Bass
boost) on the receiver side.
6. PANEL FACILITIES
1342
POWER
LINE LEVEL
IN
OUT
LEVEL
AC120V 60HZ 60W
MIN MAX

HTP702-SW, HTP202/302-SW
10
* Measuredpursuant to the Federal Trade Commission's Trade
Regulation rule on Power Output Claims for Amplifiers.
** Measured by Audio Spectrum Analyzer.
Note: Specifications and design subject to possible modification
without notice due to improvements.
7. SPECIFICATIONS
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HTP702-SW, HTP202/302-SW
11
NOTES

HTP702-SW, HTP202/302-SW
12