ORDER NO.
PIONEER ELECTRONIC CORPORATION
4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan
PIONEER ELECTRONICS SERVICE, INC. P.O. Box 1760, Long Beach, CA 90801-1760, U.S.A.
PIONEER ELECTRONIC (EUROPE) N.V . Haven 1087, Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 501 Orchard Road, #10-00 Wheelock Place, Singapore 238880
PIONEER ELECTRONIC CORPORATION 1998
AMPLIFIER
RRV1957
TDZE MAY 1998 Printed in Japan
HTV-A1
1. SAFETY INFORMATION .................................... 2
2. EXPLODED VIEWS AND PARTS LIST ............. 4
3. SCHEMATIC DIAGRAM ..................................... 6
4. PCB CONNECTION DIAGRAM ....................... 14
5. PCB PARTS LIST ............................................. 20
6. ADJUSTMENT .................................................. 22
CONTENTS
7. GENERAL INFORMATION .............................. 22
7.1 IC ................................................................ 22
7.2 DIAGNOSIS ................................................ 24
7.3 BLOCK DIAGRAM ...................................... 26
8. PANEL FACILITIES AND SPECIFICATIONS
.................................................................... 28
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
Type
Model
HTV-A1
Power Requirement
Remarks
KUCXJ
AC120V
This product does not operate normally by itself. Please connect it to the Control Center HTV-C1
for operating inspection. If operation confirmation for the unit by itself can not be avoided, refer to
"7.2 DIAGNOSIS".
The HTV-A1 is a part of the Powered Subwoofer HTV-SW1. The Powered Subwoofer HTV-SW1 is a
part of the Hometheater System HTV-1.
Hometheater System
Control Center
HTV-1
HTV-C1 (service manual RRV1960)
(service manual RRV1968)
Powered Subwoofer
HTV-SW1 (service manual RRV1969)
Amplifier
HTV-A1 (this service manual)
HTV-A1
2
1. SAFETY INFORMATION
1. SAFETY PRECAUTIONS
The following check should be performed for the
continued protection of the customer and service
technician.
ANY MEASUREMENTS NOT WITHIN THE LIMITS
OUTLINED ABOVE ARE INDICATIVE OF A PO-
TENTIAL SHOCK HAZARD AND MUST BE COR-
RECTED BEFORE RETURNING THE APPLIANCE
TO THE CUSTOMER.
2. PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in the appli-
ance have special safety related characteristics. These
are often not evident from visual inspection nor the
protection afforded by them necessarily can be ob-
tained 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
on the schematics and
on the parts list in this Service Manual.
The use of a substitute replacement component which
does not have the same safety characteristics as the
PIONEER recommended replacement one, shown in
the parts list in this Service Manual, may create shock,
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
ad-
ditional copies of, PIONEER Service Manual may be
obtained at a nominal charge from PIONEER.
LEAKAGE CURRENT CHECK
Measure leakage current to a known 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 60 Hz outlet and turn the AC power switch on. Any
current measured must not exceed 0.5 mA.
(FOR USA MODEL ONLY)
Also test with plug
reversed
(Using AC adapter
plug as required)
Device
under
test
Test all exposed
metal surfaces
Earth ground
Leakage
current
tester
Reading should
not be above
0.5 mA
AC Leakage Test
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 performed repairs can adversely affect the safety and reliability of the product and may
void the warranty. If you are not 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 whic h
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.
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.
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.
HTV-A1
3
HTV-A1
4
1
25
9
23
23
11
23
9
23
24
23
5
14
23
9
23
23
26
23
23
23
23
20
23
19
23
6
4
3
12
13
7
22
22
10
8
15
15
18
16
21
16
2
18
18
17
A
B
A
B
D
C
D
C
2. EXPLODED VIEWS AND PARTS LIST
EXTERIOR
HTV-A1
5
EXTERIOR 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.
Screw adjacent to
mark on the product are used for disassembly.
Mark No.
Description
Part No.
1
AFPS ASSY
AWU7073
2
PAMP ASSY
AWU7074
3
PT PRI ASSY
AWU7075
4
PT SEC ASSY
AWU7076
5
JACK ASSY
AWU7077
6
Power Transformer (T1)
ATS7212
7
Fuse (5A, FU1)
REK1083
8
AC Power Cord
PDG1057
9
Push Rivet
AEC7149
NSP
10
Chassis
ANA7076
NSP
11
Heat Sink
ANH7076
12
Binder
ZCA-SKB90BK
13
Barrier
AEC7135
14
Heat Protector
AEC7136
15
Mini Card Spacer
AEC7143
16
Mica Sheet
AEE7010
17
Strain Relief
CM-22C
NSP
18
PCB Holder
PNW2174
19
Bonnet Case
AZN7709
20
65 Label
ORW1069
21
Screw
ABA-258
22
Screw
ASZ40P060FMC
23
Screw
BBZ30P080FMC
24
Cushion
AEB7123
25
Screw
IBZ30P080FMC
NSP
26
Name Label
AAX7637