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 safel y, you
should not risk trying to do so and refer the repair to a qualified service technician.
WARNING
This product contains lead in solder and certain electrical par ts contain chemicals which are known to the state of California to
cause cancer, birth defects or other reproductive harm.
Health & Safety Code Section 25249.6 – Proposition 65
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.
Reading should
not be above
0.5 mA
Earth ground
Device
under
test
Also test with plug
reversed
(Using AC adapter
plug as required)
Leakage
current
tester
Test all exposed
metal surfaces
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 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.
on the schematics and
2
Page 3
2. 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.
Screws adjacent to mark on the product are used for disassembly.
M-10X
2.1 PACKING
12
Separate
8
11
FRONT
MY type Only
4
13
KU/CA type
MY type
KU/CA type Only
Separate
9
15
(1) PACKING PARTS LIST
15
14
1
4
Mark No. DescriptionPart No.
1Operating Instructions
2....................................
3....................................
NSP4Warranty Card
5....................................
6....................................
7....................................
8Side Protector LAHA7127
9Side Protector RAHA7128
10....................................
11Packing Case
NSP 12Literature BagAHG–117
13Packing SheetAHG1016
14Remote Control CordPDE1247
15Power Cord
See Contrast table (2)
See Contrast table (2)
See Contrast table (2)
See Contrast table (2)
(2) CONTRAST TABLE
M-10X/KU/CA and MY are constructed the same except for the following:
Mark
No.
Symbol and Description
KU/CA typeMY type
1Operating Instructions (English)ARC7331Not used
1Operating InstructionsNot usedARC7332
35Main Power ButtonAAD7437AAD7596
36Bonnet CaseANE7185ANE7264
37Panel BaseAMB7736AMB7735
38Front PanelANB7255ANB7252
39ScrewBBT30P080FZKBBT30P080FNI
41Power ButtonAAD7436AAD7446
47Top CoverNot usedAME7371
NSP49Fuse CardAAX1180Not used
NSP50Fuse CardAAX7832Not used
NSP51Fuse Caution LabelAAX7831Not used
Part No.
Remarks
5
Page 6
1
234
M-10X
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM
3.1 BLOCK DIAGRAM AND OVERALL SCHEMATIC DIAGRAM
A
(J4)
FRONT R ASSY
E
(AWX7768)
B
LED ASSY
(AWX7770)
(J5)
B
CN601
C
D
0.7V/50 kΩ
JA101
CN204
CN401
AF ASSY
(AWX7776: KU/CA type)
A
(AWX7767: MY type)
DIRECT ENERGY MOS POWER AMP
POWER AMP
WRLC
29dB
CN202
(J2)
R413
IC451
+19.4V
–15V
6
1234
D457–D460
Page 7
5
67
8
M-10X
Note: When ordering service parts, be sure to refer to "EXPLODED VIEWS AND PARTS LIST" or "PCB PARTS LIST".
CN701
FRONT L ASSY
F
(AWX7766)
AC PRIMARY ASSY
(AWX7771: KU/CA type)
C
(AWX7056: MY type)
KU/CA type
MY type
• NOTE FOR FUSE REPLACEMENT
CAUTION -
FOR CONTINUED PROTECTION AGAINST RISK OF FIRE.
REPLACE WITH SAME TYPE AND RATINGS OF FUSE.
MY type
CN801
KU/CA type
AC POWER CORD
ADG1154
AC POWER CORD
ADG7021
A
B
CN803
KU/CA type
MY type
D
POWER SW ASSY
(AWX7057)
Description:
Power amplifier part
Revise a wide range linear circuit of A-504R
series (WRLC), and this circuitry uses
MOS-FET for power output stage without
source resistance.
Power amplifier part
Power supply unit consists of main
transformer and sub transformerfor u-COM.
Secondary side of main transformer is
divided for DIRECT ENERGY MOS AMP by
2 circuit.
C
D
250V
7
5
6
7
8
Page 8
M-10X
1
234
3.2 AF and LED ASSYS
A
A
AF ASSY
(AWX7776: KU/CA type)
(AWX7767: MY type)
B
CN204
CN202
E
CN601
820k820k
C
D
JA101
INPUT
51k
51k
8
A
1234
Page 9
5
67
8
M-10X
C
CN803
: Audio Signal Route (L ch)
J2
JA401
A
B
MY type Only
A
SPEAKER TERMINAL 4-P
VKE1002 (KU/CA type)
VKE1003 (MY type)
C
To SPEAKER
CN401
J5
D
LED ASSY
B
(AWX7770)
BA
5
6
7
8
9
Page 10
1
234
M-10X
3.3 AC PRIMARY, POWER SW, FRONT R and FRONT L ASSYS
• NOTE FOR FUSE REPLACEMENT
CAUTION -
A
FOR CONTINUED PROTECTION AGAINST RISK OF FIRE.
REPLACE WITH SAME TYPE AND RATINGS OF FUSE.
CN803
AC PRIMARY ASSY
C
(AWX7771: KU/CA type)
(AWX7056: MY type)
6.3A/125V REK1085 (KU/CA)
T2AL250V REK1025 (MY)
A
J2
B
FRONT R ASSY
E
(AWX7768)
CN801
C
D
10
EC
1234
Page 11
5
S901: POWER SW
D
POWER SW
ASSY
(AWX7057)
67
8
M-10X
A
MY type
A
250V
B
CN601
J4
KU/CA type
• NOTE FOR FUSE REPLACEMENT
CAUTION -
FOR CONTINUED PROTECTION AGAINST RISK OF FIRE.
REPLACE WITH SAME TYPE AND RATINGS OF FUSE.
A
CN202
CN701
C
D
FRONT L ASSY
F
(AWX7766)
FED
5
6
7
8
11
Page 12
1
M-10X
4. PCB CONNECTION
DIAGRAM
4.1 AF and LED ASSYS
A
SIDE A
To POWER
TRANSFORMER
T1
C
CN803
234
Rear
A
AF ASSY
B
C
NOTE FOR PCB DIAGRAMS:
1. Part numbers in PCB diagrams match those in the schematic
diagrams.
2. A comparison between the main parts of PCB and schematic
diagrams is shown below.
Symbol in PCB
Diagrams
BCE
BCE
DGS
3. The parts mounted on this PCB include all necessary parts
for several destination.
For further information for respective destinations, be sure
to check with the schematic diagram.
4. Viewpoint of PCB diagrams
Symbol in Schematic
Diagrams
BCE
BCEBCE
DGSDGS
BCE
CapacitorConnector
Part Name
Transistor
Transistor
with resistor
Field effect
transistor
Resistor array
3-terminal
regulator
SIDE A
P. C. BoardChip Part
LED ASSY
B
D
12
BA
1234
SIDE B
(ANP7377-A)
Page 13
5
67
8
M-10X
Q401
A
Q406
Q413 Q414
Q451
IC451
IC151
IC452
VR301
VR302
Q452
Q409
Q411
Q323
Q319
Q322
Q313
Q318
Q309
Q312
IC101
Q410
Q412
Q407
Q408 Q324
Q101
Q151
Q104
Q153
B
C
Q325
Q334
E
Q301
Q304
Q251
A
8
CN601
D
13
IC301
IC251
(ANP7376-A)
5
6
7
Page 14
1
234
M-10X
4.2 AC PRIMARY, POWER SW, FRONT R and FRONT L ASSYS
A
T1 POWER TRANSFORMER
MY type
A
B
KU/CA type
Rear
SIDE A
F
FRONT L ASSY
C
VR751VR752
Q707
Q706
D
14
F
1234
Q704Q701Q702
Q703
IC751
Q751Q752
(ANP7376-A)
Q705
Page 15
5
AC PRIMARY ASSY
C
67
SIDE A
POWER SW
D
ASSY
LIVENEUTRAL
KU/CA type
MY type
8
M-10X
A
B
E
FRONT R ASSY
Q811IC811
(ANP7377-A)
A
(ANP7377-A)
J2
C
Q607
Q614
5
Q611
Q615
Q613
Q612
A
CN202
VR601
D
(ANP7377-A)
Q602Q601
6
Q603
IC601
Q605Q604
7
Q608
IC602
Q618
Q609
IC603
Q617
Q606Q610
EDC
8
Q616
15
Page 16
M-10X
5. PCB PARTS LIST
NOTES : ÷ Parts marked by “ NSP ” are generally unavailable because they are not in our Master Spare Parts List.
÷ The
÷ When ordering resistors, first convert resistance values into code form as shown in the following examples.
LIST OF WHOLE PCB ASSEMBLIES
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.
Ex. 1When there are 2 effective digits (any digit apart from 0), such as 560 ohm and 47k ohm (tolerance is shown by
J = 5%, and K = 10%).
560 Ω = 56 × 10
47k Ω = 47 × 10
0.5 Ω = R50 ...................................................................... RN2H Â50 K
1 Ω = 1R0 ......................................................................... RS1P 1Â 0 K
Ex. 2When there are 3 effective digits (such as in high precision metal film resistors).
MUTE ON : Repeats H and L every 1 second.
15P22/IN2ODIRECT INDICATOR
16P21/IN1OTAPE2 INDICATOR
17P20/IN0OFUNCTION switch MUTE.
18VREFIPulls up to 5V.
19XINI4.19MHz
20XOUTOCeramic vibrating and connecting terminal.
21VSS–– Digatal GND.
22VCC–– Power supply +5V.
23P50/XCINISPEAKER-B KEY input.
BACK UP detection pin. interrupt specification.
27P31/INT1ONot used.
28 P32/CNTR0IREC selector input 1.
29 P33/CNTR1I
REC selector input 2. interrupt specification.
30P40OVolume DOWN data output.
31P41OVolume UP data output.
32P42IFUNCTION selector input 1.
33P43IFUNCTION selector input 2.
34P00IWAKE UP input.
Key on wake up specification.
35P01IMUTE KEY input.
Key on wake up specification.
36P02IDIRECT KEY input.
Key on wake up specification.
37P03OProtection control pin.
38P04IOutput error detection pin
39P05OMUTING control pin.
40P06ILOUDNESS KEY input.
Key on wake up specification.
41P07IPOWER KEY input.
Key on wake up specification.
42P52ITAPE2 KEY input.
20
Page 21
7.2 CIRCUIT DESCRIPTION
M-10X
Use a wide range linear circuit of A-607R series
for voltage stage, and use HEX POWER MOSFET for output stage.
This circuitry eliminates source resistance, and reduce
power loss in large amount with super low capacity
resistor of output stage device and realize the low
generation of heat, low source voltage.
This circuitry eliminates source resistance and listing
electric coil, and achieve the damping factor that is flat
with band (20Hz - 20kHz).
8. PANEL FACILITIES AND SPECIFICATIONS
+B1
+B2
–B2
–B1
PANEL FACILITIES
(The illustration shows the KU/CA type.)
23
v¿,?m
Î
POWER
STANDBY/ON
OFF ON
STEREO POWER AMPLIFIER
STANDBY
1
1 Main power (
If the button is OFF (—), the power of the amplifier is shut
off and the STANDBY/ON button on the amplifier does not
function.
Pressing the main power button will turn the amplifier ON
(_).
OFF/ _ ON ) button
—
2 STANDBY/ON button
Press to switch the amplifier ON or into STANDBY mode.
3 STANDBY indicator
Lights when the amplifier is in STANDBY mode. (Please
note that this amplifier consumes a small amount of
power (1 W) during the standby mode.)
4 POWER indicator
Lights when the power is switched on.
REFERENCE STEREO POWER AMPLIFIER
4
NOTE:
The protection function will operate in case of internal amplifier
malfunction or in case of external causes such as static electricity or speaker terminal short circuits. When the protection function operates, the POWER indicator flashes, and the unit goes
out into standby mode.
If this occurs, check the speaker terminals and speaker cords to
make sure they are not shorted, then press the STANDBY/ON
button to turn on the unit.
If the protection function then operates again, unplug the power
cord and contact a service center.
21
Page 22
M-10X
SPECIFICATIONS
For KU/CA Type
Amplifier Section
Continuous average power output of 100
watts* per channel, min., at 4 ohms, from 20
Hz to 20,000 Hz with no more than 0.2 %**
total harmonic distortion.
Puissance de sortie moyenne continue de
100 watts* par canal, minimum, sous 4
ohms, de 20 Hz à 20.000 Hz avec distorsion
harmonique totale inférieure à 0,2 %**.
Continuous power output
(both channels driven at 20 Hz to 20 kHz)**
T.H.D. 0.2 %, 4 Ω .......................... 100 W + 100 W
T.H.D. 0.2 %, 8 Ω .............................. 70 W + 70 W
Total harmonic distortion**
20 Hz to 20 kHz, 8 Ω .................................... 0.05 %
Specifications and design subject to possible modification without
notice, due to improvements.
* Measured by Audio Spectrum Analyzer.
NOTE:
Specifications and design subject to possible modification
without notice, due to improvements.
* Measured pursuant to the Federal Trade
Commission’s Trade Regulation rule on Power Output
Claims for Amplifiers.
** Measured by Audio Spectrum Analyzer.
22
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