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POWER AMPLIFIER

XS250/350
SERVICE MANUAL

CONTENTS
SPECIFICATIONS .................................................................. 3
PANEL LAYOUT .................................................................... 4
DIMENSIONS ........................................................................ 5
BLOCK DIAGRAM ................................................................. 5
CIRCUIT BOARD LAYOUT & WIRING .................................. 6
DISASSEMBLY PROCEDURE ............................................... 7
IC BLOCK DIAGRAM .............................................................10
CIRCUIT BOARDS .................................................................11
INSPECTIONS .......................................................................13
PARTS LIST

PA 011440
1.97K-9636 1.69K-545 Printed in Japan '99.1
XS250/350

IMPORTANT NOTICE
This manual has been provided for the use of authorized Yamaha Retailers and their service personnel. It has been assumed that
basic service procedures inherent to the industry, and more specifically Yamaha Products, are already known and understood by the
users, and have therefore not been restated.
WARNING: Failure to follow appropriate service and safety procedures when servicing this product may result in personal injury,
destruction of expensive components, and failure of the product to perform as specified. For these reasons, we
advise all Yamaha product owners that all service required should be performed by an authorized Yamaha Retailer
or the appointed service representative.
IMPORTANT: The presentation or sale of this manual to any individual or firm does not constitute authorization, certification or
recognition of any applicable technical capabilities, or establish a principle-agent relationship of any form.

The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research, engineering, and
service departments of Yamaha are continually striving to improve Yamaha products. Modifications are, therefore, inevitable and
changes in specification are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist, please
contact the distributor's Service Division.

WARNING: Static discharges can destroy expensive components. Discharge any static electricity you body may have
accumulated by grounding yourself to the ground buss in the unit (heavy gauge black wires connect to this buss).
IMPORTANT: Turn the unit OFF during disassembly and part replacement. Recheck all work before you apply power to the unit.

WARNING: CHEMICAL CONTENT NOTICE!
The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and /or plastic (where applicable)
components may also contain traces of chemicals found by the California Health and Welfare Agency (and possibly other entities) to
cause cancer and/or birth defects or other reproductive harm.

DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REASON WHAT-
SOEVER!

Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose eyes to
solder/flux vapor!

If you come in contact with solder or components located inside the enclosure of this product, wash your hands before handling food.

2
XS250/350

SPECIFICATIONS
·General Specifications XS250,XS350
XS250 XS350
Power Output Level (Rated Power) 8 ohm/STEREO 170 W + 170 W 230 W + 230 W
20 Hz~20 kHz 4 ohm/STEREO 250 W + 250 W 350 W + 350 W
THD+N= 0.1% 8 ohm/BRIDGE 500 W 700 W
1 kHz 8 ohm/STEREO 185 W + 185 W 250 W + 250 W
THD+N= 0.1% 4 ohm/STEREO 280 W + 280 W 400 W + 400 W
8 ohm/BRIDGE 560 W 800 W
1 kHz, 20 ms, no cilp 2 ohm/STEREO 400 W + 400 W 600 W + 600 W
Power Bandwidth Half Power 10 Hz40 kHz (THD+N= 0.1%)
Total Harmonic Distortion (THD+N) 48 ohm/STEREO
0.05%
20 Hz-20 kHz, Half Power 8 ohm/BRIDGE
Frequency Responce 8 ohm, Po= 1 W +0.5, -1 dB 10 Hz50 kHz
Intermodulation Distortion (IMD) 48 ohm/STEREO
0.05%
60 Hz: 7 kHz, 4:1, Half Power 8 ohm/BRIDGE
Channel Separation Half Power, R L = 8 ohm,
>/65 dB, 20 Hz20 kHz
Vol. max., input 600 ohm shunt
Residual Noise Vol. min. 12.7 kHz LPF IHF-A network
>/ -75 dB
SN Ratio 100 dB
Damping Factor 8 ohm, f= 1 kHz
>/100
Slew Rate STEREO +/30 V/µS
8 ohm full swing BRIDGE +/40 V/µS
Sensitivity (Vol.max.) Rated Power into 8 ohm +1.7 dB +3.1 dB
Voltage Ggin (Vol.max.) 32.1 dB 32.1 dB
Input Impedance 30 k ohm/Balanced, 15 k ohm/Unbalanced
Controls Front Panel POWER switch (ON/OFF)
Rear Panel Volume (31 position)x 2
Mode switch (STEREO/BRIDGE/PARALLEL)
Filter switch (OFF/SUBWOOFER/LOW CUT)x 2 (-12 dB/oct.)
Freq. control (25 Hz125 Hz) x 2
Connectors Input Barrier strip terminal
XLR-3-31 type/ch
Output Barrier strip terminal
5-way binding posts
Indicators POWER Green
PROTECTION x 2 (Red)
CLIP x 2 (Red)
SLGNAL x 2 (Green)
Protection Circuits POWER switch ON muting, DC detection,
Temp. detection (heatsink temp >/ 90°C)
PC limiter R L Fan Speed Low/50°C, variable/5070°C, High/70°C
Power Requirements US & Canada 120 V, 60 Hz
Europe 240 V, 50/60 Hz
Other 240 V, 50/60 Hz
Power Consumption 450 W/600 VA 600 W/800 VA
Idling 45 W 45 W
1/8 output power, 4 ohm 400 W 550 W
Maximum output, 4 ohm 1000 W 1400 W
Dimentions (W x H x D) 480 x 132 x 319 mm
Weight 18 kg 20 kg
0 dB=0.775 Vrms, Half Power=1/2 Power Output Level (Rated Power)

3
XS250/350

PANEL LAYOUT
Front Panel

1 2 3 4

POWER

ON OFF

POWER SIGNAL CLIP PROTECTION CLIP SIGNAL
CH A CH B

1 POWER switch and indicator
2 SIGNAL indicators
3 CLIP indicators
4 PROTECTION indicator

Rear Panel

1 2 3 4

FILTER
CHANNEL B CHANNEL A
FREQ. FREQ.
90 90 15 15
20 20
50 50
10 10
25 25
125 125 6 6
30 30
3 3
40 40
25 150 25 150 00 0 00 0
Hz Hz dB dB
CHANNEL B CHANNEL A
LOW CUT LOW CUT SPEAKERS
MODE B-1 CHANNEL A-1
SUB WOOFER SUB WOOFER BRIDGE 4-8/CHANNEL (STEREO)
OFF OFF STEREO PARALLEL
B-2 CHANNEL A-2 + +
4-8/CHANNEL (STEREO)
+ +

INPUT INPUT
CHANNEL B CHANNEL A CHANNEL B CHANNEL A (BRIDGE) () (+)
G G (PARALLEL)
() (+)

8-16 (BRIDGE) 8-16 (BRIDGE)

(BRIDGE)
(PARALLEL)

5 6

1 Frequency controls/Filter select switches (CHAN-NEL A,B)
2 Volume controls (CHANNEL A,B)
3 STEREO/BRIDGE/PARALLEL switch
4 SPEAKERS terminals
5 INPUT terminals
6 GND terminals

4
XS250/350

DIMENSIONS

Unit: mm

BLOCK DIAGRAM
IC102

3 1 2 7 2 7
2

IC101 IC104

5 2 7 2 7
7
6

5
XS250/350

CIRCUIT BOARD LAYOUT & WIRING
Top View

SUB 5/5
SUB 2/5
Power
Transformer

SUB 1/5

XS350 Only

PA7

SUB 4/5

Front View
SUB 3/5

SUB 4/5 Wire color

3NC2-V294020
6
XS250/350

DISASSEMBLY PROCEDURE
1. Top Cover 3. SUB7 1/5 Circuit Board
1-1 Remove the nine (9) screws marked [410]. The top cover 3-1 Remove the top cover. (See Procedure 1.)
can then be removed. 3-2 Remove the six (6) screws marked [80a]. The SUB 1/5
circuit board can then be removed.
2. Power Transformer
2-1 Remove the top cover. (See Procedure 1.)
2-2 Remove the four (4) screws marked [70]. The power 4. SUB 2/5 Circuit Board
transformer can then be removed. 4-1 Remove the top cover. (See Procedure 1.)
4-2 Remove the six (6) screws marked [50a] and the two (2)
screws marked [50b]. The SUB 2/5 circuit board can then
[410] Top cover be removed.

2/5 [50b] [410] Rear panel

[410]

[410]
1/5 [70] 4

[410]
[50a] [50a]

[80a] 6 [410] Power Transformer [410]

[70]: Bind Head Screw SP 5.0X10 MFZN2BL (VU688100)
[80]: Bind Head Tapping Screw-B 3.0X8 MFZN2BL (EP600190) [50a]: Bind Head Screw A4.0X8 MFZN2BL (VP156800)
[410]: Bind Head Tapping Screw-B 4.0X8 MFZN2BL (EG340190) [410]: Bind Head Tapping Screw-B 4.0X8 MFZN2BL (EG340190)

5. Front Panel 7. SUB 4/5 Circuit Board
5-1 Remove the top cover. (See Procedure 1.) 7-1 Remove the top cover. (See Procedure 1.)
5-2 Remove the two (2) screws marked [380a] and the two (2) 7-2 Remove the front panel. (See Procedure 5.)
screws marked [380b]. The front panel can then be removed. 7-3 Remove the two (2) screws marked [200]. The SUB 4/5
circuit board can then be removed.
6. SUB 3/5 Circuit Board 8. DC Fan
6-1 Remove the top cover. (See Procedure 1.) 8-1 Remove the top cover. (See Procedure 1.)
6-2 Remove the front panel. (See Procedure 5.) 8-2 Remove the front panel. (See Procedure 5.)
6-3 Remove the two (2) screws marked [220]. The SUB 3/5 8-3 Remove the four (4) screws marked [150]. The DC fan
circuit board can then be removed. can then be removed.

4/5 [200] [220] [150] Front panel [380a]
[380a]

3/5

[380b] [150] DC Fan [380b]

[220]: Bind Head Tapping Screw-B 3.0X8 MFZN2BL (EP600190)
[380]: Bind Head Tapping Screw-B 4.0X8 MFZN2BL (EG340190)

7
XS250/350

9. PA7 Unit
9-1 Remove the top cover. (See Procedure 1.)
9-2 Remove the front panel. (See Procedure 5.)
9-3 Remove the four (4) screws marked [250]. The PA7 unit
with the chassis can then be removed. (Fig. 4)
9-4 Remove the eight (8) screws marked [130]. The PA7 unit
can then be removed. (Fig. 5)

[250] 4 [130] FAN Angle [130]

[130] [130]
[250]: Bonding Tapping Screw-B 4.0X8 MFZN2BL (VR779900) [130]: Bind Head Tapping Screw-B 4.0X8 MFZN2BL (EG340190)
(Fig. 4) (Fig. 5)

10. PA7 Circuit Board
10-1 Remove the top cover. (See Procedure 1.)
10-2 Remove the front panel. (See Procedure 5.)
10-3 Remove the PA7 unit. (See Procedure 9.)
10-4 Remove the sixteen (16) screws marked [80b]; the four
(4) screws marked [80c] and the six (6) screws marked
[60a]. The PA7 circuit board can then be removed. (Fig. 6)
[60a] 4

[80b] 4
Holder A

Isolation sheet A
[80c] 4

PA7

Heat Sink

[80c] 4
Isolation sheet A

Holder A

[80b] 4

[60a]: Bind Head Screw SP 3.0X8 MFZN2Y (EG330290)
[80b,c]: Bind Head Tapping Screw-B 3.0X12 MFZN2BL (VQ074600)

(Fig. 6)
8
XS250/350

11. Rear Assembly
11-1 Remove the top cover. (See Procedure 1.)
11-2 Remove the six (6) screws marked [270]. The rear assembly
can then be removed. (Fig. 7)

[270] Rear assembly [270]

[270] [270]

[270]: Bonding Tapping Screw-B 4.0X8 MFZN2BL (VR779900)
(Fig. 7)

12. SUB 5/5 Circuit Board
12-1 Remove the top cover. (See Procedure 1.)
12-2 Remove the rear assembly. (See Procedure 11.)
12-3 Remove the four (4) screws marked [440] and the two (2)
screws marked [50b] and the two (2) screws marked [60b].
The SUB 5/5 circuit board can then be removed. (Fig. 7)

Cover, Speaker terminal

Rear panel [440] 2

[60b] 2
[440] 2

[50b] 2
5/5

[50a] 2

[50a] 4

2/5

[70b] 2

[50a]: Bind Head Screw A4.0X8 MFZN2BL (VP156800)
[50b]: Bonding Tapping Screw-B 3.0X8 MFZN2BL (VN413300)
[60b]: Bind Head Tapping Screw-B 3.0X12 MFZN2BL (VQ074600)
[70a]: Bind Head Screw SP 5.0X10 MFZN2BL (VU688100)
[70b]: Bind Head Tapping Screw-B 3.0X8 MFZN2BL (EP600190)
[440]: Bind Head Tapping Screw-B 3.0X8 MFZN2BL (EP600190)

(Fig. 8)

9
XS250/350

IC BLOCK DIAGRAM

M5238AP (XM085A00)
Operational Amplifier

+DC Voltage
Output A 1 +V 8
Supply
Inverting
2 7 Output B
Input A - +
Non-Inverting Inverting
3 6
Input A + - Input B

-DC Voltage Supply 4 -V 5 Non-Inverting
Input B

10
XS250/350 XS250/350 XS250/350

CIRCUIT BOARDS
SUB 1/5 Circuit Board SUB 3/5 Circuit Board

to PA-CN406

Components side

SUB 4/5 Circuit Board

Components
side
to to
from T101 SUB 2/5-CN103 PA-CN404 from T101

SUB 2/5 Circuit Board

Components side
to
SUB 1/5-CN610

SUB 5/5 Circuit Board

to
PA-CN201

to
PA-CN301

from PA-W201 Components side

·SX350 ·SX250
SUB(U) :3NA-V290000 2 SUB(U) :3NA-V289980 2
SUB(H) :3NA-V290010 2 SUB(H) :3NA-V289990 2
Components side
11
XS250/350 XS250/350 XS250/350

PA Circuit Board

to to
SUB 2/5-CN301 SUB 2/5-CN101

from FAN Components side

to SUB 1/5-CN611 to SUB 3/5-CN501

·SX350
3NA-V2899600 1
·SX250
3NA-V2899500 1
12
XS250/350

INSPECTIONS

A STEREO and PARALLEL Operation
Before performing any following adjustments, set the unit as follows:
1. Set the ATTENUATIONS at the MAX.
2. Input terminal: Cannon connector pin 2 is HOT, pins 1 and 3 GROUND.
3. MODE switch: STEREO
4. Output terminal: RL = 4 ohm/more than 500 W
5. Others: Both Channel operation is required, if no particular indication. Moreover, turn off the filter switch,
if no particular indication.

Adjustment Specifications
1. Fan Test
When turning on the power switch, confirm that both fans of right and left sides regulate at low speed.

2. Muting Test
After applying power to the unit, the PROTECTION indicator should remain ON 2.5 +/-1 seconds to indicate that the protection circuitry
is operating and the indicator should go out. NO signal is output while this indicator lit.

3. Idle Current Test
Connect the input terminal to the GROUND and adjust the VR201 (A channel) and VR301 (B channel) that the DC voltage Vb between the
pin 1 and pin 2of the CN202 (A channel) and the CN302 (B channel) should be 1.0 +/-0.2 mV. And After finishing all tests, adjust the Vb
again to 1.0 +/-0.2 mV.

4. Input Terminal DC offset
Connect the input terminal to the GROUND and check that the DC voltage Vdc of the output terminal should be 0 +/-75 mV.

5. Gain Test
Check that the OUTPUT should be +22.1 +/-0.5 dBu, when a sine wave of 1 kHz at -10 dBu is applied to the INPUT. This test should be
performed on PARALLEL operation.

6. Frequency Response Test
Filter switch OFF:
When a sine wave of 20 Hz, 1 kHz or 20 kHz at -10 dBu is applied to the INPUT, check that the output is 0 +/-0.5 dB at 20 Hz and -0.5 +/-0.5
dB at 20 kHz taking the 1 kHz as a reference.
Filter switch SUB WOOFER:

When a sine wave of 25 Hz, -10 dBu is applied to the INPUT, check that the output is -3.5 +/-1.0 dB taking the 1 kHz as a reference at the
filter switch OFF.

When a sine wave of 150 Hz, -10 dBu is applied to the INPUT, check that the output is -3.5 +/-1.0 dB taking the 1 kHz as a reference at the
filter switch OFF.

Filter switch LOW CUT:

When a sine wave of 25 Hz, -10 dBu is applied to the INPUT, check that the output is -4.5 +/-1.0 dB taking the 1 kHz as a reference at the
filter switch OFF.

When a sine wave of 150 Hz, -10 dBu is applied to the INPUT, check that the output is -3.5 +/-1.0 dB taking the 1 kHz as a reference at the
filter switch OFF.

13
XS250/350

7. Harmonic Distortion Test
When a high quality sine wave is applied at 20 Hz, 1 kHz or 20 kHz, the harmonic distortion should be as follows:

THD
Power output level (4 ohm)
20 kHz 1 kHz 20 kHz
XS350 350 W + 350 W (33.7 dBu/ch) XS250 250 W + 250 W (32.2 dBu/ch) *This test should have been finished within 30 minutes.

8. Channel Separation Test
8-1 Apply a -5 dBu, 20kHz sine wave into the channel A.
8-2 Short the input for the channel B with a 600 ohm load.
8-3 Set the output of the channel A at a reference of 0 dB.
8-4 If channel B attenuator is set to the same as channel A, channel B output should be l
ess than -65 dB. (RL = 8 ohm)

9. Noise Test
9-1 Set the input attenuator to MAX.
9-2 Short the input with a 600 ohm load.
9-3 Measure at the output, noise level should be less than -65 dBm.
9-4 Set the input attenuator to "", noise level should be less than -70 dBu.
*Be careful that it is not affected by noise induced during this inspection.

10. Stability Test
When a rectangular wave 10 kHz, -10 dBu is applied to the input and a capacitor 10 pF0.47 µF is connected with 4 ohm load resistor in
parallel, the overshoot and the ringing should be as follows.
Oversshoot: Vp/Vo Ringing: less than 5 waves
Next, when the 4 ohm load resistor is removed and the load is the capacitor 10pF0.47 µF only, the overshoot and the ringing should be
as follows.
Oversshoot: Vp/Vo Ringing: fade away in less than 7 waves and no oscilation

11. Protection Circuitry Test
Check that the relay does not work when you apply a sine wave of +5.0 dBu (XS350), +3.0 dBu (XS250) at 10 Hz to the input and adjust
the input level to obtain a clipped output wave form.
Next, check that when you apply a sine wave of 1 Hz, 0.0 dBu to the input, the signal is cut off within 2 seconds, and the PROTECTION
indicator should light up.
Finally, check that when no signal is applied, the amplifier would resume to normal operation within 10 seconds.

12. PC Limiter Circuitry Test
Check that the OUTPUT should be as follows with an oscilloscope when a sine wave of 0 dBu (XS350), -1.5 dBu (XS250) at 1 kHz is
applied to the INPUT and the output is shorted with a 1 ohm load ( +/-5%). At this time, check the CLIP indicator lights.

Model Output level
XS350 Vp-p XS250 Vp-p *This test should have been finished within 30 minutes.

14
XS250/350

13. Signal Indicator Test
When a sine wave of 1 kHz, -23 dBu is applied to the input, SIGNAL indicator should light up.

B BRIDGE Operation
Before performing any following adjustments, set the unit as follows:
1. Set the ATTENUATIONS at MAX.
2. Input terminal: Cannon connector pin 2 is HOT, pins 1 and 3 GROUND.
3. MODE switch: BRIDGE
4. Output terminal: (A ch+, B ch+) RL = 4 + 4 ohm/more than 500 W
5. Connection for measuring: Measure the output at the point as shown below.

SPEAKERS MEASURING
CHANNEL A INSTRUMENT
+ INPUT
4
GND
CHANNEL B 4
-
Adjustment Specifications
1. Gain Test
Check that the OUTPUT should be +22.1 +/-1.0 dBu, when asine wave of 1 kHz at -10 dBu is applied to the INPUT.

2. Frequency Response Test
When a sine wave of 20 Hz, 1 kHz or 20 kHz at -10 dBu is applied to the INPUT, check that the output is 0 +/-0.5 dB at 20 Hz and -0.5
+/-0.5 dB at 20kHz taking the 1 kHz as a reference.

3. Harmonic Distortion Test
When a high quality sine wave is applied at 20 Hz, 1 kHz or 20 kHz, the harmonic distortion should be as follows:

Power output level THD
(4 ohm) 20 Hz 1 kHz 20 kHz
XS350 33.7 dBu
XS250 32.2 dBu

*This test should have been finished within 30 minutes.

4. Noise Test
9-1 Set the input attenuator to "0".
9-2 Short the input with a 600 ohm load.
9-3 Measure at the output, noise level should be less than -60 dBm. (LR = 8 ohm)
9-4 Set the input attenuator to "", noise level should be less than -60 dBu
*Be careful that it is not affected by noise induced during this inspection.

C Settings after the test
The attenuator should set to "".

The MODE switch should set to STEREO.

D Others
0 dBu = 0.775 V
When measuring noise level,use a DIN audio filter.

15
XS250/350

POWER AMPLIFIER

XS250/350
PARTS LIST
CONTENTS
OVERALL ASSEMBLY ............................................................. 2
PA UNIT .................................................................................... 4
ELECTRICAL PARTS ............................................................... 5

Notes: DESTINATION ABBREVIATIONS
A : Australian model J : Japanese model
B : British model U : U.S. model
C : Canadian model V : General export model
E : European model W : General export model
H : North European model X : General export model
I : Indonesian model Y : Export model

· The numbers in "QTY" shows quantities for each unit.
· The parts with "--" in "Parts No." are not available as spare parts.
· The mark " } " in the remarks column indicates that these parts are interchangeable.

WARINIG
Conponents having special characteristics are marked and must be replaced
with parts having specifications equal to those originally installed.
XS250/350

OVERALL ASSEMBLY
410 400 410

390
430
440
430
440
260j
UL only 450 270 6
260
420
260i

100 260h 260i

260f
260k
110 260a
180 260g
260e
260c

190

200 130 70
205 220
260d
210
80 6
220 130
120 260b
170
160 60
140
150
360 20
50
40

30

10
380

250
375 360

350
15 380
370

2
XS250/350 XS250/350

REF NO. PART NO. DESCRIPTION REMARKS QTY RANK REF NO. PART NO. DESCRIPTION REMARKS QTY RANK
OVERALL ASSEMBLY XS350 XS250 260i VN413300 Bonding Tapping Screw-B 3.0X8 MFZN2BL 8 01
-- Overall Assembly XS350 U,V (V294020) 260j VQ074600 Bind Head Tapping Screw-B 3.0X12 MFZN2BL 2 01
-- Overall Assembly XS350 H,W (V294030) 260k EP600190 Bind Head Tapping Screw-B 3.0X8 MFZN2BL 2 01
-- Overall Assembly XS350 B (V294040) 270 VR779900 Bonding Tapping Screw-B 4.0X8 MFZN2BL 6 01
-- Overall Assembly XS350 A (V294050) * 280 -- Connector Assembly 2426&2426 5P 400L (V288360)
-- Overall Assembly XS250 U,V (V294060) * 290 -- Connector Assembly INA (V295010)
-- Overall Assembly XS250 H,W (V294070) * 300 -- Connector Assembly INB (V295020)
-- Overall Assembly XS250 B (V294080) 340 -- Cord Holder CV-100 (VV10460) 5 01
-- Overall Assembly XS250 A (V294090) * 350 V2943200 Rack Angle 2
10 -- Main Chassis (V294280) 360 EG340190 Bind Head Tapping Screw-B 4.0X8 MFZN2BL 6 01
* 15 V3200700 Protector 4 * 370 V2943300 Front Panel XS350 XS350
* 20 V2945100 Insulation Sheet PP 94V-0 T=0.46 * 370 V2943400 Front Panel XS250
30 VZ021200 AC Cord UC SJT 3X#18 10A U,V 06 375 VU859100 Escutcheon, Power Switch SR200 02
* 30 V2944000 AC Cord H H05VV-F0.75X3 6A H,W,A 380 EG340190 Bind Head Tapping Screw-B 4.0X8 MFZN2BL 4 01
30 VZ021600 AC Cord BS H05VV-F 13A B 08 * 390 V2943600 Top Cover XS,XH
40 VV103100 Cord Strain Relief SR-6P1 01 * 400 V2945300 Stopper Rubber XS350 XS350
50 VP156800 Bind Head Screw A4.0X8 MFZN2BL 01 410 EG340190 Bind Head Tapping Screw-B 4.0X8 MFZN2BL 9 01
* 60 XU903A00 Power Transformer XS350 U,V 420 VP156800 Bind Head Screw A4.0X8 MFZN2BL 01
* 60 XU904A00 Power Transformer XS350 H,W,B 430 VY938700 Cover, Speaker Terminal Q150/350/500 2 03
* 60 XU905A00 Power Transformer XS350 A 440 EP600190 Bind Head Tapping Screw-B 3.0X8 MFZN2BL 4 01
* 60 XU900A00 Power Transformer XS250 U,V 450 -- Label U,V (VA03930) 03
* 60 XU901A00 Power Transformer XS250 H,W,B
* 60 XU902A00 Power Transformer XS250 A
70 VU688100 Bind Head Screw SP 5.0X10 MFZN2BL 4 01
80 EP600190 Bind Head Tapping Screw-B 3.0X8 MFZN2BL 6 01
90 -- Connector Assembly 2426&2426 8P 120L (V288350)
* 100 V2941500 PA Unit XS350
* 100 V2941600 PA Unit XS250
* 110 V2942900 FAN Angle
* 120 V2945200 Packing 4
130 EG340190 Bind Head Tapping Screw-B 4.0X8 MFZN2BL 8 01
* 140 V2945700 Fan KDE2412PMS3-6A/A47
* 150 VB857700 Bind Head Screw 4.0X45 MFZN2BL 4
160 3765330 Spring Washer #2 4.0 MFZN2BL 4 01
170 ET500040 Flat Washer 4.0X10X0.8 MFZN2BL 4 01
* 180 V2943000 PSW Angle
190 VB659000 Bind Head Screw 3.0X8 MFZN2BL 2 01
200 EP600190 Bind Head Tapping Screw-B 3.0X8 MFZN2BL 2 01
205 VU859000 Power Switch Knob SR200 01
* 210 V2943100 LED Angle
220 EP600190 Bind Head Tapping Screw-B 3.0X8 MFZN2BL 4 01
* 230 -- Connector Assembly 2426&2426 7P 200L (V288370)
240 -- Cord Holder CV-100 (VV10460) 01
250 VR779900 Bonding Tapping Screw-B 4.0X8 MFZN2BL 4 01
* 260 V2941800 Rear Assembly XS350 U,V
* 260 -- Rear Assembly XS350 H,W,B (V294190)
* 260 -- Rear Assembly XS350 A (V294200)
* 260 -- Rear Assembly XS250 U,V (V294210)
* 260 -- Rear Assembly XS250 H,W,B (V294220)
* 260 -- Rear Assembly XS250 A (V294230)
* 260a V2944100 Rear Panel XS350 U,V
* 260a V2944200 Rear Panel XS350 H,W,B
* 260a V2944300 Rear Panel XS350 A
* 260a V2944400 Rear Panel XS250 U,V
* 260a V2944500 Rear Panel XS250 H,W,B
* 260a V2944600 Rear Panel XS250 A
* 260b NX820500 Circuit Board SUB3 1/5 P.SUPPLY XS350 U,V
* 260b NX820510 Circuit Board SUB3 1/5 P.SUPPLY (XV419B0)
* 260b NX820440 Circuit Board SUB3 1/5 P.SUPPLY XS350 H,W,B,A
* 260b NX820450 Circuit Board SUB3 1/5 P.SUPPLY (XV419B0)
* 260c NX820520 Circuit Board SUB3 2/5 MAIN XS250 U,V
* 260c NX820460 Circuit Board SUB3 2/5 MAIN (XV419B0)
* 260d NX820530 Circuit Board SUB2 3/5 LED XS250 H,W,B,A
* 260d NX820470 Circuit Board SUB2 3/5 LED (XV419B0)
* 260e NX820540 Circuit Board SUB2 4/5 P.SW XS350
* 260e NX820480 Circuit Board SUB2 4/5 P.SW (XV419B0)
* 260f NX820550 Circuit Board SUB2 5/5 SPEAKER XS250
* 260f NX820490 Circuit Board SUB2 5/5 SPEAKER (XV419B0)
260g VU859700 Knob N-GRAY/D-GRAY XS350 2 01
260h VU860400 Knob RED/D-GRAY (XV419B0) 2 01
*: New parts RANK: Japan only *: New parts RANK: Japan only

3
XS250/350 XS250/350

PA UNIT
REF NO. PART NO. DESCRIPTION REMARKS QTY RANK
PA UNIT XS350 XS250
* V2941500 PA Unit XS350
80 * V2941600 PA Unit XS250

50 60 6 10 -- Heat Sink (V294560)
* 20 V2945400 Isolation Sheet A UNISHEET T=0.15 4
40 VV086500 Support H=7.4 B=5.5 6 01
* 50 V2899600 Circuit Board PA35 XS350 (XV023B0)
* 50 V2899500 Circuit Board PA25 XS250 (XV023B0)
40 60 EG330290 Bind Head Screw SP 3.0X8 MFZN2Y 6 01
70 * 70 -- Holder A (V294370) 2
80 VQ074600 Bind Head Tapping Screw-B 3.0X12 MFZN2BL 20 01
* 90 V3200600 Clamp CH-01F 3
80
40

90

20 20 40

10 40
80

20

80

*: New parts RANK: Japan only

4
XS250/350

ELECTRICAL PARTS
REF NO. PART NO. DESCRIPTION REMARKS QTY RANK
ELECTRICAL PARTS XS350 XS250
* V2899600 Circuit Board PA35 XS350 (XV023C0)
* V2899500 Circuit Board PA25 XS250 (XV023C0)
* NX820500 Circuit Board SUB3 1/5 XS350 U,V (XV419C0)
* NX820510 Circuit Board SUB3 1/5 XS350 H,W,B,A (XV419C0)
* NX820520 Circuit Board SUB3 2/5 XS350 (XV419C0)
* NX820530 Circuit Board SUB3 3/5 XS350 (XV419C0)
* NX820540 Circuit Board SUB3 4/5 XS350 (XV419C0)
* NX820550 Circuit Board SUB3 5/5 XS350 (XV419C0)
* NX820440 Circuit Board SUB2 1/5 XS250 U,V (XV419C0)
* NX820450 Circuit Board SUB2 1/5 XS250 H,W,B,A (XV419C0)
* NX820460 Circuit Board SUB2 2/5 XS250 (XV419C0)
* NX820470 Circuit Board SUB2 3/5 XS250 (XV419C0)
* NX820480 Circuit Board SUB2 4/5 XS250 (XV419C0)
* NX820490 Circuit Board SUB2 5/5 XS250 (XV419C0)

-- Jumper Wire (VV29140) 01
C201 VZ004000 Electrolytic Cap. 2.2 200.0V 01
C202 VZ004000 Electroltyic Cap. 2.2 200.0V 01
C203 UJ847470 Electrolytic Cap. 47.00 25.0V 01
C204 VZ353500 Ceramic Capacitor-SL 100P 50V J 01
C205 UJ828100 Electrolytic Cap. 100.00 10.0V 01
C206 FU451330 Mica Capacitor 33P 500V J 01
C207 VV060100 Mylar Capacitor 1500P 50V J 08
C208 VZ354000 Ceramic Capacitor-F 0.0100 50V Z 01
C209 FU451220 Mica Capacitor 22P 500V J 01
C210 FU451220 Mica Capacitor 22P 500V J 01
C211 UJ847100 Electrolytic Cap. 10.00 25.0V 01
C212 VZ354000 Ceramic Capacitor-F 0.0100 50V Z 01
C213 VZ354000 Ceramic Capacitor-F 0.0100 50V Z 01
C214 UJ896470 Electrolytic Cap. 4.7 100.0V 01
C215 UJ896470 Electrolytic Cap. 4.7 100.0V 01
C216 VZ004200 Mylar Capacitor 0.1000 100V M 01
C217 VZ004200 Mylar Capacitor 0.1000 100V M 01
C218 VZ012200 Ceramic Capacitor-B 0.001 500V K 01
C219 VZ012200 Ceramic Capacitor-B 0.001 500V K 01
C301 VZ004000 Electrolytic Cap. 2.2 200.0V 01
C302 VZ004000 Electroltyic Cap. 2.2 200.0V 01
C303 UJ847470 Electrolytic Cap. 47.00 25.0V 01
C304 VZ353500 Ceramic Capacitor-SL 100P 50V J 01
C305 UJ828100 Electrolytic Cap. 100.00 10.0V 01
C306 FU451330 Mica Capacitor 33P 500V J 01
C307 VV060100 Mylar Capacitor 1500P 50V J 08
C308 VZ354000 Ceramic Capacitor-F 0.0100 50V Z 01
C309 FU451220 Mica Capacitor 22P 500V J 01
C310 FU451220 Mica Capacitor 22P 500V J 01
C311 UJ847100 Electrolytic Cap. 10.00 25.0V 01
C312 VZ354000 Ceramic Capacitor-F 0.0100 50V Z 01
C313 VZ354000 Ceramic Capacitor-F 0.0100 50V Z 01
C314 UJ896470 Electrolytic Cap. 4.7 100.0V 01
C315 UJ896470 Electrolytic Cap. 4.7 100.0V 01
C316 VZ004200 Mylar Capacitor 0.1000 100V M 01
C317 VZ004200 Mylar Capacitor 0.1000 100V M 01
C318 VZ012200 Ceramic Capacitor-B 0.001 500V K 01
C319 VZ012200 Ceramic Capacitor-B 0.001 500V K 01
* C401 V3532400 Mylar Capacitor 0.47 250V M
* C402 V3532400 Mylar Capacitor 0.47 250V M
C403 VY897000 Electrolytic Cap. 6800 100V XS350 08
-406 VY897000 Electrolytic Cap. 6800 100V XS350 08
C403 VV082100 Electrolytic Cap. 6800 80V XS250 08
-406 VV082100 Electrolytic Cap. 6800 80V XS250 08
C407 UJ867470 Electrolytic Cap. 47.00 50.0V 01
C408 UJ866470 Electrolytic Cap. 4.70 50.0V 01
D201 VD631600 Diode 1SS133,176,HSS104 01
-206 VD631600 Diode 1SS133,176,HSS104 01
D207 IF005560 Diode 1SS82TD 01
D208 IF005560 Diode 1SS82TD 01
D209 VU801600 Diode 1N4004L 26 01
D210 VU801600 Diode 1N4004L 26 01
D301 VD631600 Diode 1SS133,176,HSS104 01
*: New parts RANK: Japan only

5
XS250/350

REF NO. PART NO. DESCRIPTION REMARKS QTY RANK
-306 VD631600 Diode 1SS133,176,HSS104 01
D307 IF005560 Diode 1SS82TD 01
D308 IF005560 Diode 1SS82TD 01
D309 VU801600 Diode 1N4004L 26 01
D310 VU801600 Diode 1N4004L 26 01
D401 VR149900 Diode Stack D25XB60 25.0A 600V 06
D402 VD631600 Diode 1SS133,176,HSS104 01
D403 VU801600 Diode 1N4004L 26 01
L201 VR150900 Coil RZ-001 21mm 02
L301 VR150900 Coil RZ-001 21mm 02
Q201 IA097030 Transistor 2SA970 GR,BL 01
-203 IA097030 Transistor 2SA970 GR,BL 01
Q204 IC224030 Transistor 2SC2240 GR,BL 01
-206 IC224030 Transistor 2SC2240 GR,BL 01
Q207 IC1815M0 Transistor 2SC1815 Y,GR 01
Q208 VR152800 Transistor 2SA1480 E,F 02
Q209 IA101590 Transistor 2SA1015 O,Y 01
Q210 VR152900 Transistor 2SC3790 E,F 02
Q211 VQ547300 Transistor 2SC4793 (HFE) 03
Q212 V2797700 Transistor 2SC5395 E,F 01
Q213 V2797600 Transistor 2SA1993 E,F 01
Q214 VR152900 Transistor 2SC3790 E,F 02
Q215 VR152800 Transistor 2SA1480 E,F 02
Q216 VQ547300 Transistor 2SC4793 (HFE) 03
Q217 VQ547200 Transistor 2SA1837 (HFE) 03
Q301 IA097030 Transistor 2SA970 GR,BL 01
-303 IA097030 Transistor 2SA970 GR,BL 01
Q304 IC224030 Transistor