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. 253 Alexandra Road, #04-01, Singapore 159936
PIONEER ELECTRONIC CORPORATION 1999
STEREO POWER AMPLIFIER
1. SAFETY INFORMATION ...................................... 2
2. EXPLODED VIEWS AND PARTS LIST ................ 3
3. SCHEMATIC DIAGRAM ....................................... 6
4. PCB CONNECTION DIAGRAM ............................ 8
5. PCB PARTS LIST ............................................... 14
6. ADJUSTMENT .................................................... 16
7. GENERAL INFORMATION ................................ 17
7.1 SINGLE OPERATION METHOD ................. 17
8. PANEL FACILITIES AND SPECIFICATIONS .... 18
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
T ZZK APR. 1999 Printed in Japan
This product is a component of a system.
For the accessories, instruction manuals etc., refer to the service manuals RRV2124 for
XC-IS21MD and RRV2123 for XC-IS21T.
This product does not function properly when independent; to avoid malfunctions, be
sure to connect it to the prescribed system component(s), otherwise damage may
CD MD TUNER
CD TUNER DECK
STEREO POWER AMPLIFIER
This Service Manual
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.
This product contains lead in solder and certain electrical parts contain chemicals which are known to the state of California to
cause cancer, birth defects or other reproductive harm.
Health & Safety Cod e Section 25249.6 Proposition 65
(FOR CANADIAN MODEL ONLY)
(fast operating fuse)
(slow operating fuse) on PCB indicate that replacement
parts must be of identical designation.
(POUR MODÈLE CANADIEN SEULEMENT)
Les symboles de fusible
(fusible de type rapide)
(fusible de type lent) sur CCI indiquent que
les pièces de remplacement doivent avoir la même désignation.
ANY MEASUREMENTS NOT WITHIN THE
LIMITS OUTLINED ABOVE ARE INDICATIVE
OF A POTENTIAL SHOCK HAZARD AND
MUST BE CORRECTED BEFORE RETURN-
ING 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
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
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
of, PIONEER Service Manual may be obtained at a
nominal charge from PIONEER.
(FOR USA MODEL ONLY)
1. SAFETY PRECAUTIONS
The following check should be performed for the
continued protection of the customer and service
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.
not be above
Also test with
(Using AC adapter
plug as required)
AC Leakage Test
2. EXPLODED VIEWS AND PARTS LIST
Parts marked by "NSP" are generally unavailable because they are not in our Master Spare Parts List.
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.
Screws adjacent to
mark on product are used for disassembly.
¶ PACKING PARTS LIST
Side Pad AL
Side Pad AR
Packing Case AMP MY
POWER SUPPLY Assy
METER CONNECT Assy
Fuse (FU1 : T2.5A)
DC FAN Motor
See Contrast table (2)
Lens Holder A
Power PAC Holder
· · · · ·
Front Panel A
Screw With Washer
(1) EXTERIOR PARTS LIST
Symbol and Description
(2) CONTRAST TABLE
M-IS21/MYXJ and NVXJ are constructed the same except for the following :
Caution when disassemble.
Even if the power supply code is pulled out from the outlet, neither C11 nor C12 of AF ASSY are discharged.
Please discharge C11 and C12 of AF ASSY by the resistor of 100
or more before removing AF ASSY or POWER SUPPLY ASSY.
There is a possibility to destroy the transistor, and Please discharge by the resistor of 100