ORDER NO.
RRV1957
AMPLIFIER
HTV-A1
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
Type |
Model |
Power Requirement |
Remarks |
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HTV-A1 |
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KUCXJ |
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AC120V |
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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 |
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Control Center |
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HTV-1 |
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HTV-C1 (service manual RRV1960) |
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(service manual RRV1968) |
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Powered Subwoofer |
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HTV-SW1 (service manual RRV1969) |
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Amplifier |
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HTV-A1 (this service manual) |
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”.
CONTENTS
1. SAFETY INFORMATION .................................... |
2 |
7. GENERAL INFORMATION .............................. |
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2. EXPLODED VIEWS AND PARTS LIST ............. |
4 |
7.1 |
IC ................................................................ |
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3. SCHEMATIC DIAGRAM ..................................... |
6 |
7.2 |
DIAGNOSIS ................................................ |
24 |
4. PCB CONNECTION DIAGRAM ....................... |
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7.3 BLOCK DIAGRAM ...................................... |
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5. PCB PARTS LIST ............................................. |
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8. PANEL FACILITIES AND SPECIFICATIONS |
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6. ADJUSTMENT .................................................. |
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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
T–DZE MAY 1998 Printed in Japan
HTV-A1
1. SAFETY INFORMATION
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 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 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.
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Reading should |
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not be above |
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Leakage 0.5 mA |
Device |
current |
tester |
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under |
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test |
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Test all exposed |
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metal surfaces |
Also test with plug reversed
(Using AC adapter plug as required)
Earth ground
AC Leakage Test
ANY MEASUREMENTS NOT WITHIN THE LIMITS OUTLINED ABOVE ARE INDICATIVE OF A POTENTIAL SHOCK HAZARD AND MUST BE CORRECTED BEFORE RETURNING THE APPLIANCE TO THE CUSTOMER.
2. PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in the appliance have special safety related characteristics. 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 
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 additional copies of, PIONEER Service Manual may be obtained at a nominal charge from PIONEER.
2
HTV-A1
3
HTV-A1
2. EXPLODED VIEWS AND PARTS LIST
EXTERIOR |
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B |
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A |
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C D |
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D
22
C
6
B A
10
4
HTV-A1
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.
EXTERIOR PARTS LIST
Mark |
No. |
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Description |
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Part No. |
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1 |
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AFPS ASSY |
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AWU7073 |
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PAMP ASSY |
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AWU7074 |
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PT PRI ASSY |
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AWU7075 |
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4 |
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PT SEC ASSY |
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AWU7076 |
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5 |
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JACK ASSY |
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AWU7077 |
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6 |
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Power Transformer (T1) |
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ATS7212 |
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7 |
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Fuse (5A, FU1) |
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REK1083 |
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8 |
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AC Power Cord |
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PDG1057 |
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9 |
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Push Rivet |
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AEC7149 |
NSP |
10 |
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Chassis |
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ANA7076 |
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NSP |
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Heat Sink |
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ANH7076 |
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Binder |
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ZCA-SKB90BK |
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Barrier |
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AEC7135 |
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Heat Protector |
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AEC7136 |
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15 |
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Mini Card Spacer |
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AEC7143 |
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16 |
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Mica Sheet |
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AEE7010 |
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17 |
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Strain Relief |
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CM-22C |
NSP |
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PCB Holder |
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PNW2174 |
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Bonnet Case |
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AZN7709 |
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65 Label |
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ORW1069 |
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Screw |
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ABA-258 |
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Screw |
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ASZ40P060FMC |
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Screw |
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BBZ30P080FMC |
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Cushion |
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AEB7123 |
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25 |
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Screw |
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IBZ30P080FMC |
NSP |
26 |
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Name Label |
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AAX7637 |
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5
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HTV-A1
3. SCHEMATIC DIAGRAM
3.1 OVERALL CONNECTIONS
A
D PAMP ASSY
(AWU7074)
B
E
JACK ASSY
(AWU7077)
C |
A |
AFPS ASSY |
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(AWU7073) |
D
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HTV-A1
Note : When ordering service parts, be sure to refer to "EXPLODED VIEWS and PARTS LIST" or "PCB PARTS LIST".
B
PT SEC ASSY
(AWU7076)
A
B
AC 120V
60 Hz
AC POWER CORD
PDG1057
T1
POWER TRANSFORMER
ATS7212
C
C
PT PRI ASSY
(AWU7075)
D
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HTV-A1
3.2 AFPS, PT SEC AND PT PRI ASSEMBLIES
SIGNAL ROUTE
: AUDIO SIGNAL (L ch)
: AUDIO SIGNAL (SW ch)
E-VOLUME & TONE CONTROL, SUBWOOFER LEVEL
A |
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BALANCED IN |
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E |
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CN1105 |
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+9.0 |
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B |
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+4.5 |
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(VREF) |
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I / O EXPANDER |
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Q1003, Q1004 : |
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AC RELAY DRIVER |
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3 |
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0.0 |
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+0.7 |
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0.0 |
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C |
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0.0 |
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0.0 |
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LPF 180Hz |
IC8001 (BU2092F) |
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No. Pin Name STAND BY |
ON |
MUTE |
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L / R MIX |
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1 |
GNDD |
0.0 V |
0.0 V |
0.0 V |
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2 |
DATA |
5.0 V |
5.0 V |
5.0 V |
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3 |
CLK |
0.0 V |
0.0 V |
0.0 V |
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4 |
LCK |
0.0 V |
0.0 V |
0.0 V |
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5 |
PWON |
5.1 V |
0.0 V |
0.0 V |
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6 |
SPRY |
4.7 V |
0.0 V |
0.0 V |
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7 |
ACRY |
5.1 V |
0.0 V |
0.0 V |
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8 |
MUTE |
0.0 V |
5.1 V |
0.0 V |
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17 |
OE |
0.0 V |
0.0 V |
0.0 V |
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18 |
VDD |
5.1 V |
5.1 V |
5.1 V |
D |
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A |
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∙ |
8 |
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HTV-A1 |
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CAUTION : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, |
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CAUTION : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, |
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REPLACE ONLY WITH SAME TYPE NO. 4911.25 MFD, BY |
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REPLACE ONLY WITH SAME TYPE NO. 491010 MFD, BY |
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LITTELFUSE INK. FOR IC101 AND IC102(AEK7010). |
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LITTELFUSE INK. FOR IC110 AND IC111(AEK7022). |
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CAUTION : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, |
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CAUTION : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, |
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REPLACE ONLY WITH SAME TYPE NO. 491001 MFD, BY |
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REPLACE ONLY WITH SAME TYPE NO. 491.250 MFD, BY |
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LITTELFUSE INK. FOR IC103(AEK7009). |
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LITTELFUSE INK. FOR IC121 AND IC122(AEK7002). |
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EL |
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HPF 180Hz |
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A |
AFPS ASSY |
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BUFFER AMP |
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(AWU7073) |
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D
CN1101
40Hz +9.5dB HPF
D
CN1102
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Q1001, Q1002 : |
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E |
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PROTECTION (SPEAKER) |
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+35.1 |
RELAY DRIVER |
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CN1104 |
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0.0 |
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+44.1 |
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ACH7007 |
4700/63 |
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T 1 : POWER TRANSFORMER |
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ATS7212 |
AC 120V |
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60 Hz |
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AC POWER CORD |
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PDG1057 |
ACH7007 4700/63 |
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+35.1 |
REK1083:1 5A/125V |
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–44.1 |
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+17.7 |
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FU |
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A
B
C
–17.9
B C
D
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PT SEC ASSY |
POWER SUPPLY |
(AWU7076) |
∙ NOTE FOR FUSE REPLACEMENT
CAUTION -FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE WITH SAME TYPE AND RATINGS ONLY.
PT PRI ASSY
(AWU7075)
A B C 9
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