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XP1000/XP2500/XP3500
s INSPECTION
Scope
This inspection specifications is applied to the power amplifier XP1000/XP2500/XP3500.
1. Power Source/Frequency
Destination Voltage Frequency
U, T 120 V +2 %
-0 60 Hz
H, B, K, O 230 V +2 %
-0 50 Hz
A 240 V +2 %
-0 50 Hz
2. Preparation for STEREO/PARALLEL mode
Attenuator "0"(MAX) (Both Channel)
Input terminal cannon type connector: 2PIN-HOT/3PIN-COLD/1PIN-GND
MODE switch STEREO
GAIN switch 32dB
HPF switch OFF (Both Cannel)
Load resistor 8 +/- 1%
Unless otherwise specified, the operation shall be both channels drive.
Unless ohterwise specified, the input signal shall be high quality sine wave.
3. Inspection and Adjustment
3. 1 POWER LED, PROTECTION LED and Power on muting time
POWER LED and PROTECTION LED shall light when the POWER switch is turned on.
2.5 +/- 1 seconds after the power switch is turned on, PROTECTION LED shall lights off.
3. 2 Fan and TEMP LED
The fan shall operate when short circuit on the two jumper wires that mounted of DC circuit board marked "FAN-C".
The TEMP LED shall lights up when short circuit on the two jumper wires that marked "TM-C".
3. 3 Idle current
Connect the input terminal to the GROUND and adjust VR101(channel A) and VR102(channel B) on the PA UNIT so
that the DC voltage of Vb between the pin1 and pin2 of CN108(channel A) and the CN107(channel B) shall be 0.5 +/- 0.1mV.
After finishing all inspections, adjust the Vb again to 0.5 +/- 0.1mV.
3. 4 DC Voltage of output terminal
Connect the input terminal to the GROUND and measure the DC voltage Vdc of the output terminal shall be 0 +/- 75mV.
3. 5 Gain
3. 5. 1 Nominal Gain
The output voltage should be +22.0 +/- 0.5dBu when input signal is 1kHz, -10.0dBu.
3. 5. 2 GAIN switch
Set the Gain SW to 26dB.
With 1kHz -10dBu input signal, the output voltage shall be +16.0 +/- 0.5dBu.
Set the GAIN switch to +4dBu.
With 1kHz -10dBu input, the output voltage shall be as following table.
XP1000 XP2500 XP3500
+17.2 dBu +21.2 dBu +22.7 dBu
+/-0.5 dBu +/-0.5 dBu +/-0.5 dBu
3. 5. 3 Attenuator
Set the input attenuator to -10dB.
With 1kHz -10dBu input signal, the output voltage shall be +12.0 +/- 3.0dB.
3. 5. 4 PARALLE MODE
Set the MODE switch to PARALLEL.
Apply 1kHz -10dBu signal to input terminal of channel A.
26 Input signal must not be applied to input terminal of channel B when PALLEL MODE.
At this time, the output voltages of both channels shall be +22.0 +/- 0.5dBu.
XP1000/XP2500/XP3500
3. 6 Frequency response
Input signals are each 20Hz, 1kHz and 20kHz, -10dBu. The output voltage shall be -0.5 +/- 0.5dB at 20Hz and 20kHz
compared to the 1kHz.
Set HPF switch to 20Hz.
With 20Hz -10dBu input signal, output voltage shall be -3.0 +/- 2.0dB compared to the value with 1kHz -10 dBu input
signal at HPF switch OFF.
Set HPF switch to 55Hz.
With 55Hz -10dBu input signal, output voltage shall be -3.0 +/- 2.0dB compared to the value with 1kHz -10 dBu input
signal at HPF switch OFF.
3.7 Distortion Factor
Input signals are each 20Hz and 20kHz, the distortion shall be less than 0.1% when output level as follows.
This inspection should have been finished within 30 seconds.
XP1000 XP2500 XP3500
28.29 V 44.73 V 52.92 V
(100 W + 100 W) (250 W + 250 W) (350 W + 350 W)
3.8 Cross talk
Input signal is 1kHz to the channel A, and connect between the input terminals of channel B (2pin-hot and 3pin-cold)
by 600 ohms. Set the output level of channel A as following Output level of the channel signal applied .
The output voltage of channel B shall be less than following Output level of the channel terminated with 600 ohms
The conditions of channel A and channel B are replaced and inspected. Both the load resistor and the measurement
instruments shall be connected to 5-way terminals (SP303). DIN AUDIO filter shall be used for the measurements.
XP1000 XP2500 XP3500
Output level of the channel 28.3 dBu 32.3 dBu 33.7 dBu
signal applied (50 W) (125 W) (175 W)
Output level of the channel
-41.7 dBu -37.7 dBu -36.3 dBu
terminated with 600 ohms
3.9 Output Noise level
Connect between the input terminals (2pin-hot and 3pin-cold) by 600 ohms. The noise level of the output terminal shall
be less than -65dBu. Set the input attenuator to MIN. The noise level shall be less than -70dBu. DIN AUDIO filter shall
be used for the measurements.
3.10 Stability
Connect only capacitance of 0.01uF(Polyester film capacitor) to output terminal. The overshoot and the ringing should
be as follows. Input signal is 1KHz, -10dBu square wave.
Overshoot Vp/Vo < 2.5
Ringing: within 7 waves and no oscillation
Vp
Vo
Ringing Waves
27
XP1000/XP2500/XP3500
3.11 Protection circuit for DC fault
Disconnect of load resistor from output terminal. PROTECTION LED shall light up within 2 seconds when short circuit
on the two jumper wires that mounted of PCB ASSY DC circuit marked "DC-C".
The LED shall light off within 10 seconds after getting the short off.
3.12 Efficiency
(1) The primary electrical power shall be 130 +/- 20W when input signal is 1kHz, -6.6dBu.
(2) The primary electrical power shall be as follows when connect between the input terminals
(2pin-hot and 3pin-cold) by 600 ohms.
XP1000 XP2500 XP3500
15 +/- 10W 20 +/- 10W 25 +/- 10W
3.13 VI limiter and compressor
Connect 1 ohm (+/- 5%) load resistor to output terminal. Apply to the input terminal at 1 kHz the signal of level as shown
below. The output voltage shall be as follows and the distortion shall be less than 5%. Then, CLIP LED shall light up.
This inspection should have been finished within 30 seconds. This test is individually executed in each channel.
XP1000 XP2500 XP3500
Input signal level -7.5 dBu -6.5 dBu -1.5 dBu
Output signal level 6.5 +/- 3 V 10 +/- 3 V 16 +/- 4 V
3.14 SIGNAL LED
SIGNAL LED shall lights up when input signal is 1kHz, -23dBu. This test is individually executed in each channel.
2.15 MONITOR/REMOTE
2.15.1 Preparation
The inspection circuit described on Fig.1 is connected MONITOR/REMOTE terminal (JK304).
The tolerance of the connected resistor shall be 1% or less and the rated power is shall be 1/4W or more.
The tolerance of the connected DC voltage shall be 1% or less.
7.5 k ohms
15 pin
These pins are connected to MONITOR/REMOTE
14 pin
7.5 k ohms
13 pin
12 pin
180 ohms
11 pin
10 pin
180 ohms
9 pin
8 pin
SW1
7 pin
terminnal JK304.
6 pin
SW2
5 pin
4 pin
1.5 k ohms SW3
3 pin
5V 2 pin
330 ohms SW4
1 pin
2.15.2 Output Level
The output voltage of 14pin to 15pin of JK304 shall be -4.8 +/- 1dBu when input signal is 1kHz -10.0dBu.
2.15.3 Mute and Protection Status
1kHz -10dBu signal is applied to input terminal.
The DC voltages of 10pin and 11pin of JK304 shall be +2 +/- 0.5V.
When SW1 is turned on, the DC voltage of 11pin of JK304 shall be less than 0.5V and the output level of channel A
output terminal shall be less than -30dBu.
When SW2 is turned on, the DC voltage of 10pin of JK304 shall be less than 0.5V and the output level of channel B
28 output terminal shall be less than -30dBu.
XP1000/XP2500/XP3500
3.15.4 Model ID
When the SW3 is turned on, the DC output voltage of 3pin of JK304 shall be within the range specified in the "ID-V"
of following table.
XP1000 XP2500 XP3500
ID-V 2.97 2.73 2.50
+/- 0.06 V +/- 0.06 V +/- 0.06 V
3.15.5 Standby
When the SW4 is turned on, the POWER LED light up to orange and the primary electrical power shall be less than 5W.
4. Preparation For BRIDGE mode
Attenuator "0"(MAX) Effective only channel A.
Input terminal Cannon type connector: 2PIN-HOT/3PIN-COLD/1PIN-GND
MODE switch BRIDGE
GAIN switch 32 dB
HPF switch OFF (Both Cannel)
Load resistor 8 ohms + 8 ohms +/- 1 %
For items of BRIGE mode, the input signal shall be applied only to input terminal of channel A.
It must be applied to input terminal of channel B.
Connection for measuring: Measure the output at the point as shown below.
5. Inspection
5.1 Gain
The output voltage shall be +28.0 +/- 1.0 dBu when input signal is 1kHz, -10.0 dBu.
5.2 Frequency response
Input signals are each 20 Hz, 1kHz and 20 kHz, -10 dBu. The output voltage shall be -0.5 +/- 0.5 dB at 20 Hz and 20 kHz
compared to the 1kHz.
5.3 Distortion Factor
Input signals are each 20 Hz and 20 kHz.
The distortion shall be less than 0.1% when output voltage as follows.
This inspection should have been finished within 30 seconds.
XP1000 XP2500 XP3500
56.58 V 89.46 V 105.84 V
5.4 Output Noise level
Connect between the input terminals (2pin-hot and 3pin-cold) by 600 ohms.
The noise level of output terminal shall be less than -60 dBu. Next, set the input attenuator to MIN.
The noise level shall be less than -65 dBu. DIN AUDIO filter shall be used for the measurements.
6. Factory Settings
Attenuator MIN (Both Cannel)
MODE switch STEREO
GAIN switch 32 dB
HPF switch OFF (Both Cannel)
29
XP1000/XP2500/XP3500
s
XP1000/XP2500/XP3500
100 V +2 %
-0 50 Hz
Attenuator "0"(MAX) (Both Channel)
Input terminal cannon type connector: 2PIN-HOT/3PIN-COLD/1PIN-GND
MODE switch STEREO
GAIN switch 32dB
HPF switch OFF (Both Cannel)
Load resistor 8 +/- 1%
POWER LED PROTECTION LED
2.5 1 PROTECTION LED
DC "FAN-C" 2 FAN
"TM-C" 2 TEMP LED
PA VR101(A ) VR102(B )
CN108(A ) CN107(B ) 1-2 Vb 0.5 0.1 mV
Vb 0.5 0.1 mV
Vdc 0 75 mV
1 kHz, -10.0 dBu +22.0 0.5 dBu
GAIN 26 dB
1kHz, -10 dBu +16.0 0.5 dBu
GAIN +4 dBu
1 kHz, -10 dBu
XP1000 XP2500 XP3500
+17.2 dBu +21.2 dBu +22.7 dBu
+/-0.5 dBu +/-0.5 dBu +/-0.5 dBu
-10 dB 1 kHz, -10.0 dBu
+12.0 3.0 dB
MODE PARALLEL
1 kHz, -10 dBu A
PARALLEL B
+22.0 0.5 dBu
30
XP1000/XP2500/XP3500
20 Hz, 1 kHz, 20 kHz, -10 dBu 1 kHz 20 Hz, 20 kHz
-0.5 0.5 dB
HPF 20 Hz
20 Hz, -10 dBu HPF OFF 1 kHz, -10 dBu
-3.0 2.0 dB
HPF 55 Hz
55 Hz, -10 dBu HPF OFF 1 kHz, -10 dBu
-3.0 2.0 dB
20Hz, 20kHz 0.1%
XP1000 XP2500 XP3500
28.29 V 44.73 V 52.92 V
(100 W + 100 W) (250 W + 250 W) (350 W + 350 W)
A 1kHz B (2 pin-hot 3 pin-cold) 600
A Output level of the channel signal applied
B Output level of the channel terminated with 600 ohms
A B
5-way DIN AUDIO filter
XP1000 XP2500 XP3500
Output level of the channel 28.3 dBu 32.3 dBu 33.7 dBu
signal applied (50 W) (125 W) (175 W)
Output level of the channel
-41.7 dBu -37.7 dBu -36.3 dBu
terminated with 600 ohms
(2 pin-hot 3 pin-cold) 600 -65 dBu
MIN -70 dBu
DIN AUDIO filter
0.01 F( )
1 KHz, -10 dBu
Vp/Vo < 2.5
7
Vp
Vo
Ringing Waves
31
XP1000/XP2500/XP3500
DC "DC-C" 2
2 PROTECTION LED
10 LED
(1) 1 kHz, -6.6 dBu 130 +/- 20 W
(2) (2 pin-hot 3 pin-cold) 600
XP1000 XP2500 XP3500
15 +/- 10W 20 +/- 10W 25 +/- 10W
( 5%) 1 kHz
5% CLIP LED
XP1000 XP2500 XP3500
-7.5 dBu -6.5 dBu -1.5 dBu
6.5 +/- 3 V 10 +/- 3 V 16 +/- 4 V
1kHz, -23dBu SIGNAL LED
Fig. 1 MINITOR/REMOTE (JK304) 1% 1/4 W
1%
These pins are connected to MONITOR/REMOTE terminnal JK304.
7.5 k ohms
15 pin
14 pin
7.5 k ohms
13 pin
12 pin
180 ohms
11 pin
10 pin
180 ohms
9 pin
8 pin
SW1
7 pin
6 pin
SW2
5 pin
4 pin
1.5 k ohms SW3
3 pin
5V 2 pin
330 ohms SW4
1 pin
1 kHz, -10 dBu JK304 14 15 -4.8 1.0 dBu
1 kHz, -10 dBu JK304 10pin 11pin +2 0.5 V
SW1 ON 11 pin 0.5 V A ch -30 dBu
SW2 ON 10 pin 0.5 V B ch -30 dBu
32
XP1000/XP2500/XP3500
SW3 ON JK304 3 DC ID-V
XP1000 XP2500 XP3500
ID-V 2.97 2.73 2.50
+/- 0.06 V +/- 0.06 V +/- 0.06 V
SW4 ON POWER LED 1 5W
Attenuator "0"(MAX) Effective only channel A.
Input terminal Cannon type connector: 2PIN-HOT/3PIN-COLD/1PIN-GND
MODE switch BRIDGE
GAIN switch 32dB
HPF switch OFF (Both Cannel)
Load resistor 8 ohms + 8 ohms +/- 1%
BRIDGE A
B
1 kHz, -10.0 dBu +28.0 1.0 dBu
20 Hz, 1 kHz, 20 kHz, -10 dB 1 kHz 20 Hz, 20 kHz
-0.5 0.5 dB
20 Hz, 20 kHz 0.1%
30
XP1000 XP2500 XP3500
56.58 V 89.46 V 105.84 V
(2 pin-hot 3 pin-cold) 600
-60 dBu MIN
-65 dBu DIN AUDIO filter
Attenuator MIN (Both Cannel)
MODE switch STEREO
GAIN switch 32 dB
HPF switch OFF (Both Cannel)
33
POWER AMPLIFIER
CIRCUIT DIAGRAM
s CONTENTS
IC & DIODE OUTSIDE FIGURE 2
BLOCK DIAGRAM 3
OVERALL CIRCUIT DIAGRAM
DM 1/2 ............................................................................................. 4
DM 2/2 ............................................................................................. 5
SUB ................................................................................................. 6
PAL .................................................................................................. 7
DC
to DC 003: C10
: Ceramic Capacitor
: Mylar Capacitor
: Flame Proof C. Resistor
: Mica Capacitor
: Capacitor
: Flame Proof C. Resistor
: Metal Oxide Filme Resistor
WARNING
Components having special characteristics are marked and must be replaced with parts having specification
equal to those originally installed.
Note : See parts list for details of circuit board component parts.
XP1000/XP2500/XP3500
q NJM7815FA (XD853A00) q NJM7915FA (XD854A00) q NJM78M05FA (XJ604A00)
REGULATOR +15V REGULATOR -15V REGULATOR +5V
DC: IC401 DC: IC402 DC: IC441
1 : OUTPUT 1 : OUTPUT 1 : OUTPUT
2 : COMMON 2 : INPUT 2 : COMMON
3 : INPUT 3 : COMMON 3 : INPUT
2
X W V U T S R Q P O N M L K J I H G F E D C B A
s (XP1000/X2500/X3500) XP1000/X2500/X3500
1
GAIN SW (Max Output Power 8ohms) CLIP/LIMIT SIGNAL LED Max Output Power
GAIN SW AMP CH A CH B CH A CH B TEMP PROTECTION (1KHz THD+N 1%)
INPUT LEVEL(Max Output Power 8ohms) POSITION TOTAL GAIN RE RE GR GR MODEL 8ohms 4ohms
GAIN SW INPUT LEVEL XP3500 +32.7dBu XP3500 390W x2 590W x2 2
POSITION XP3500 XP2500 XP1000 +4dBu XP2500 +31.2dBu +24 RE RE XP2500 275W x2 390W x2
+4dBu +4dBu XP1000 +27.2dBu LD303 LD304 LD301 LD302 LD305 XP1000 (J)110W x2 (J)120W x2
+26dB +10.7dBu +9.2dBu +5.2dBu +32dB +32dB LD306 (U,T)135W x2 (U,T)165W x2
+32dB +4.7dBu +3.2dBu -0.8dBu +26dB +26dB LED DRIVE CIRCUIT (H,B,K,O)125W x2 (H,B,K,O)155W x2
+24 (A)120W x2 (A)155W x2
Q301-Q308
3
W301B
W301A BCL ACL
ACL BCL
W310-10P (1/2)
ASIG BSIG IO (3/4)
CN416-10P(2/2)
BSIG
+15
IO (1/4)
ASIG
XLR
+15 a
JK301 +15 4
IC301-1/2
1 2 3
IC301-2/2 IC303-1/2 OFF IC501 +B SP RELAY SPEAKON
INPUT MAX PA GAIN W304
CN105-1P
1 6 BA 7 3 HPF 1 20Hz LIMITER +32dB SP301
+22dBu 3 2 HA (INV) 20Hz 2 PA
OR 1+
VR301 SW303 RY101
CH A ATT 5 HPF 7 55Hz -15 1- 2-
CH A (31Position) +4dBu
+26dB 55Hz 6 +15 +15 +15 -B CH A-2 5
Euroblock IC303-2/2 -15 -15 CN416-10P (1/2) (A+B BRIDGE)
JK303
SW302 +32dB
-15 IC305-2/2 PAL +24 A RY TM PR 2+
CN101-15P (1/2)
CN414-15P (1/2)
CN414-15P (2/2)
LED DRIVE
CN101-15P (2/2)
6 INV 7 PROTECTION CIRCUIT W306
-15 A DC CIRCUIT Q401-403 +24
W302B-6P (S)
W302A-6P (S)
CN501-8P
AMP HEAT SINK
CN302-8P
( CN301-7P )
HPF 12dB/oct
( CN303-7P )
YE SP302
CN301-7P
Q404
CN303-7P
TEMP ,405 Q445 1+
6
VR GAIN PR101 : +90
TEMPERATURE
SENSOR b Q410 Q460
,412 Q464
+ ,473 Q475
A MUTE
APS
B MUTE
BPS
1- 2- CH B-2
-15 a PR102 : +60 ,474
IO (2/4) SW301
+15 Q409,
Q416-420
B DC -24 B RY
+5 2+
SPEAKON 7
STEREO SW302 +4dBu
CH B BRIDGE CH B ATT +26dB +15 +15 +B
1 2 PARALLEL 3
IC302-1/2 (31Position) IC302-2/2 +32dB
IC304-1/2 OFF SW304 STEREO SW301 IC502 PA GAIN RY102 IO (4/4)
CN106-1P
1 6 BA 7 3 HPF 1 20Hz +32dB
2 HA LIMITER PA 8
3 (INV) 20Hz 2 BRIDGE
+B CN103 -B SP RELAY CH A-1
W303A-4P (S)
W303B-4P (S)
VR302 PARALLEL
JK302 5 HPF 7 55Hz -15
XLR
STEREO 55Hz 6 -B
SW301 BRIDGE IC304-2/2 CN102 CN104 CH B-1
PARALLEL RE BL WH (A+B BRIDGE) 9
-15
MODE -15 W401 W402 W403 SP303
+B c -B 5way
*1 (S): soldered b MONITOR
*2 BL:Black, WH:White, BR:Brown, BE:Blue, VI:Violet, GY:Gray, YE:Yellow, RE:Red, OR:Orange FAN CONTROL REMOTE 10
CIRCUIT
Q406-408,411,413 B OUTPUT LEVEL
A OUTPUT LEVEL
CN304-6P
CN441-6P
LED DC RELAY & LED
DRIVE CIRCUIT
-24
MUTE
PROTECT STATUS
STANDBY 11
POWER Model ID