NAD M25 C User manual

SERVICE MANUAL
SERVICE MANUAL
M25 C/AH
MOD EL: M3SERVICE MANUAL
© NAD 2005
NAD ELECTRONICS INTERNATIONAL
TORONTO
M25 C/AH
SEVEN CHANNEL AMPLIFIER
M25 C/AH
SEVEN CHANNEL AMPLIFIER
SEVEN CHANNEL AMPLIFIER

CONTENTS
FRONT PANEL/REAR PANEL VIEW3
SPECIFICATIONS
4
ALIGNMENT PROCEDURE/ALIGNMENT POINTS5-6
WIRING DIAGRAM
7
SCHEMATIC DIAGRAM8-16
PCB LAYOUT
17-23
ELECTRICAL PARTS LIST24-40
EXPLODED VIEW
41-44
EXPLODED VIEW PARTS LIST45
PACKING DIAGRAM
46
SERVICE SAFETY PRECAUTIONS
1. Replacing the Fuses
CAUTION: FOR CONTINUED PROTECTION AGAINST THE RISK OF FIRE
REPLACE ONLY WITH SAME TYPE OF FUSE.
REFERENCE NO. PART NUMBER DESCRIPTION
Rear Panel
AH 20-11203-10 MDA T20AL/250V
C 20-12103-20 MDA T10AL/250V
AMP Board
F101/F102 20-12632-00 T6.3AL/250V
PSU Board
F201-F204 20-12162-01 T1.6AL/250V
NOTE:
*AH : North American version only
*C : European version only
2. Safety-check out (North American model only)
Before returning the product to the customer, make leakage current or
resistance measurements to determine that exposed parts are acceptably
insulated from the supply circuit.
Parts marked with the symbol are critical with regard to the risk of fire and
electric shock.Replace only parts recommended by the manufacturer.
-2-

FRONT PANEL / REAR PANEL VIEW
FRONT PANEL CONTROLS
1. POWER SWITCH
2. POWER INDICATOR 3. SOFT CLIPPING INDICATOR 4. PROTECTION INDICATOR
1. AC INLET
2. INPUT JACK
3. LEVEL CONTROL
4. SPEAKER TERMINALS
5. AUTO TRIGGER SWITCH
6. 12V TRIGGER INPUT
7. SOFT CLIPPING SWITCH
8. MAINS FUSE
9. GROUND TERMINAL
-3-

-4-
SPECIFICATIONS
CONTINUOUS AVERAGE POWER 160 W (22.0 dBW)
OUTPUT INTO 8 OHMS OR 4 OHMS
(Min. power per channel, 20 Hz – 20 kHz, both
channels driven, with no more than rated
distortion)
Rated Distortion 0.03%
(THD 20 Hz – 20 kHz)
Clipping power 180 W
(maximum continuous power per channel).
IHF dynamic power
(Maximum short term power per channel)
8 ohms: 220 W (23.4 dBW)
4 ohms: 385 W (25.9 dBW)
2 ohms: 485 W (26.9 dBW)
Damping factor >180
(ref. 8 ohms 50Hz)
Input Impedance R = 1 Mohms
C = 180 pF
Input sensitivity (for rated output into 8 ohms) 1250mV+/-50mV
Voltage gain 29 dB
Frequency response 20 Hz – 20 kHz 0.2 dB
- 3dB at 3 Hz/70 kHz
Signal / Noise ratio, A-weighted >96 dB ref. 1 W
>118 dB ref. 160W
DIMENSIONS AND WEIGHTS
Net Weight 44.5 kg (98.0 Ib)
Shipping Weight 53 kg (116.7 Ib)
Dimension (W×H×D) 435 ×200 ×465.6mm

ALIGNMENT PROCEDURE
A. THERMAL SENSE ADJUSTMENT
This adjustment should be always done when the M25 is cool condition. (That means the
temperature inside the unit should be almost same as the ambient temperature.
Connector P208B that connects the transformer and power board should be removed to
avoid that the Idling current heats up the unit excessively) At ambient temperature of 25 C
degrees and when the unit is just turned on (still in cool condition), adjust the pot
RV103(as marked as “Thermal Sense ADJ” in below drawing) for a voltage between the
THERMAL TEST POINT and AGND to be 750mV+/-10mV. If the ambient temperature is
different, the voltage setting should be changed by 20mV per degree difference. So at
20C degrees, the voltage should be 850mV+/-10mV; and at 30C degrees, the voltage
should be 650mV+/-10mV, etc.
B. DC OFFSET VOLTAGE
The DC OFFSET between OFFSET Test Point and AGND must be within 0+/-3mV. If it’s
found to be out of this range, change the TL084BCD to one selected for low offset voltage
to meet the requirement.
C. IDLING CURRENT
The idling current in the output stage of the poweramp should be set to 40mA+/-10mA
per pnp-npn transistor pair( This means the mid point voltage is 17.6mV with down limit of
13.2mV and up limit of 22mV). The alignment procedure is: At first, adjust RV102 (Marked
as “Idling Current ADJ” in the drawing below) for a voltage of 17.6mV +/- 1mV between
Testpoint1and2.Thenpre
heat the unit for 5 minutes, let idling current settled and then
readjust to 17.6mV +/- 1mV.
Pls note:
1. The idling current must be adjusted when all modules are assembled into the unit.
2. Though the idling current is set as 17.6mV +/-1mV during the adjustment, due to the
influence of varied ambient temperature and mains voltage etc., the idling current will drift
after some time. During the normal checking of idling current in the service field, it’s
acceptable as long as the voltage is in the range of 13.2mV—22.0mV.
D. ISC Current sense zero-set.
The ISC current-sensing voltage at no signal should be 0mV+/-50mV. During factory
alignment, it is set to 0mV+/-10mV . That is to adjust Pot RV104 (as marked as “ISC
SENSE ADJ” in the below drawing) to get a voltage between the “ISC SENSE TEST
POINT” and AGND to be 0mV+/-10mV.
(Pls note the ISC should be adjusted when all modules are plugged in. It’s not possible to get
0mV +/-10mV if any of the modules are removed.)
E. Fan Cut Off Point Adjustment
Check the Fan sense voltage first. Turn Pot RV201 to the end clockwise and confirm TP2
of J201 is in negative voltage. Run the unit to heat it up and drive the fan to start turning,
-5-

for example, all 7 channels at 50W/4ohms for 10 minutes or 5 minutes or even less (as
long as the fan can starts turning). Turn off the signal but still keep the unit operating for 1
minute. Then run all 7 channels at 1kHz, 0.25W at 4 ohms load, monitor the voltage at
TP1 of Pot RV201. Adjust RV201 to get the voltage from negative to positive to ensure
that the Fans are turned off. Then run all 7 channels at 1kHz, 0.5W at 4 ohms
load, monitor if the voltage at TP1 of Pot RV201 is negative, if not, adjust Pot RV201 just
to the point that TP1 changes from positive to negative (to get the fans just start turning).
Finally, turn off the signal and monitor if fans stop turning within about 30s Max."
-6-
ISC SENSE ADJ

AGND
ACINACIN ACOUTACOUT +5V+5V RELAYRELAY
SC NPN
SC PNP
+18V
-18V
+70V
-70V
PROTECT
SEN
AC OFF
+62V
-62V
-62V
AGND
AGND
AGND
ISC T RIG
AGND
+62V
+18V
-18V
+70V
-70V
PROTECT
SEN
AC OFF
SC NPN
SC PNP
+62V
-62V
-62V
AGND
AGND
AGND
ISC TRIG
AGND
+62V
+18V
-18V
+70V
-70V
PROTECT
SEN
AC OFF
SC NPN
SC PNP
+62V
-62V
-62V
AGND
AGND
AGND
ISC TRIG
AGND
+62V
+18V
-18V
+70V
-70V
PROTECT
SEN
AC OFF
SC NPN
SC PNP
+62V
-62V
-62V
AGND
AGND
AGND
ISC T RIG
AGND
+62V
+18V
-18V
+70V
-70V
PROTECT
SEN
AC OFF
SC NPN
SC PNP
+62V
-62V
-62V
AGND
AGND
AGND
ISC TRIG
AGND
+62V
+18V
-18V
+70V
-70V
PROTECT
SEN
AC OFF
SC NPN
SC PNP
+62V
-62V
-62V
AGND
AGND
AGND
ISC TRIG
AGND
+62V
+18V
-18V
+70V
-70V
PROTECT
SEN
AC OFF
SC NPN
SC PNP
+62V
-62V
-62V
AGND
AGND
AGND
ISC TRIG
AGND
+62V
+18V
-18V
+70V
-70V
PROT1
SEN1
ACOFF
SCN_4
+62V_4
-62V_4
-62V_4
AGND4
AGND4
AGND4
ISCTRIG_1
+62V_4
+18V
-18V
+70V
-70V
PROT2
SEN2
ACOFF
SCN_4
SCP_4
+62V_4
-62V_4
-62V_4
AGND4
AGND4
AGND4
ISCTRIG_2
+62V_4
+18V
-18V
+70V
-70V
PROT3
SEN3
ACOFF
SCN_4
SCP_4
+62V_4
-62V_4
-62V_4
AGND4
AGND4
AGND4
ISCTRIG_3
+62V_4
+18V
-18V
+70V
-70V
PROT4
SEN4
ACOFF
SCN_4
SCP_4
+62V_4
-62V_4
-62V_4
AGND4
AGND4
AGND4
ISCTRIG_4
+62V_4
+18V
-18V
+70V
-70V
PROT5
SEN5
ACOFF
SCN_3
SCP_3
+62V_3
-62V_3
-62V_3
AGND6
AGND6
AGND6
ISCTRIG_5
+62V_3
+18V
-18V
+70V
-70V
PROT6
SEN6
ACOFF
SCN_3
SCP_3
+62V_3
-62V_3
-62V_3
AGND6
AGND6
AGND6
ISCTRIG_6
+62V_3
+18V
-18V
+70V
-70V
PROT7
SEN7
ACOFF
SCN_3
SCP_3
+62V_3
-62V_3
-62V_3
AGND6
AGND6
AGND6
ISCTRIG_7
+62V_3+62V_4
+62V_4
-62V_4
-62V_4
AGND4
AGND4
AGND4
AGND4
AGND6
AGND6
AGND6
AGND6
+62V_3
+62V_3
-62V_3
-62V_3
SCLED SCLED DGND DGND PROT7 PROT1 PROT6 PROT2 PROT5 PROT3 PROT4 +8V +8V STBY STBY ISCTRIG_4 ISCTRIG_3 DGND ISCTRIG_2 ISCTRIG_1 SEN5 AGND SEN4 SEN6 SEN3 SEN7 ISCTRIG_7 SEN2 SEN1 ISCTRIG_6 ISCTRIG_5 DGND +18V -18V +70V ACOFF -70V FAN2 FAN3 AGND FAN1
FAN1 DGND FAN2 DGND FAN3 DGND
SCP_4
+8V
DGND
SCLED
SCN_4
SCP_3
SCN_3
+62V_3
-62V_3
SCP_4
-62V_4
+62V_4
STBY
+8V
DGND
SCLED
SCN_4
SCP_3
SCN_3
+62V_3
-62V_3
SCP_4
-62V_4
+62V_4
STBY
DGND PROT7 AGND PROT1 PROT6 PROT2 PROT5 PROT3 PROT4 +8V +8V SCLED STBY STBY SCLED DGND ISCTRIG_4 ISCTRIG_3 DGND ISCTRIG_2 ISCTRIG_1 SEN5 AGND SEN4 SEN6 SEN3 SEN7 ISCTRIG_7 SEN2 SEN1 ISCTRIG_6 ISCTRIG_5 DGND +18V -18V +70V ACOFF -70V FAN2 FAN3 AGND FAN1
AGND4
AGND4
AGND4
AGND4
+62V_4
+62V_4
-62V_4
-62V_4
AGND6
AGND6
AGND6
AGND6
+62V_3
+62V_3
-62V_3
-62V_3
PROT1
+12VD
PROT6
PROT2
SCLED
PROT3
STBYLED
PROT4
PROT3
PROT5
PROT4
PROT5
+5VD
PROT7
DGND
DGND
PROT1
+12VD
PROT6
PROT2
SCLED
PROT3
STBYLED
PROT4
PROT3
PROT5
PROT4
PROT5
+5VD
PROT7
DGND
DGND
+12V
-12V
+18V
-18V
+70V
-70V
-62V_4
+62V_4
-62V_3
+62V_3
+/-12V digital voltage
regulators
+/-18V analog voltage
regulators
+/-70V analog voltage
regulators
High current 4 channel
analog voltage rectify
High current 3 channel
analog voltage rectify
POWERAMP BOARD POWERAMP BOARD POWERAMP BOARD POWERAMP BOARD POWERAMP BOARD POWERAMP BOARD POWERAMP BOARD
TRIG&SC BOARD
CONNECTION BOARD
POWER SUPPLY BOARD
STANDBY BOARD
POWER SWITCH BOARD
LED DISPLAY BOARD
TO P209B TO P208B
TO P501B TO P502B
TO P504BTO P505B
1
2
P101AP101A1
2
3
4
5
6
7
8
9
P622BP622B
1 2
P301A
FLEX 16PIN 1.0mm
P301A
FLEX 16PIN 1.0mm
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
P616BP616B
1
2
3
4
5
6
7
8
9
P202AP202A
1
2
3
4
5
6
7
8
P611BP611B
1
2
3
4
5
6
7
8
9
P620BP620B
1
2
3
4
5
6
7
8
P503BP503B
1 2
P102AP102A
1
2
3
4
5
6
7
8
9
FAN2FAN2
1
2
P608BP608B 1
2
3
4
5
6
7
8
9
P618BP618B
1
2
3
4
5
6
7
8
9
10
11
12
P101AP101A 1
2
3
4
5
6
7
8
9
1
2
3
4
P101AP101A1
2
3
4
5
6
7
8
9
P613BP613B
1
2
3
4
5
6
7
8
9
P201AP201A
1
2
3
4
5
6
7
8
P204BP204B
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16
P207BP207B
1 2 3 4
P619BP619B
1
2
3
4
5
6
7
8
P504BP504B
1
2
P206B
FLEX 16PIN 1.0mm
P206B
FLEX 16PIN 1.0mm
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
P801AP801A
1 2
P102AP102A
1
2
3
4
5
6
7
8
9
P502BP502B
1 2
P401BP401B
1
2
3
4
5
6
7
8
9
10
11
12
P621BP621B
1 2
P610BP610B 1
2
3
4
5
6
7
8
9
P605BP605B 1
2
3
4
5
6
7
8
9
P101AP101A 1
2
3
4
5
6
7
8
9
P615BP615B
1
2
3
4
5
6
7
8
9
P102AP102A
1
2
3
4
5
6
7
8
9
P601BP601B
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16
P603BP603B
1 2 3 4 5 6 7 8 9
10
P102AP102A
1
2
3
4
5
6
7
8
9
P203BP203B
1 2 3 4 5 6 7 8 9
10
FAN1FAN1
1
2
P607BP607B 1
2
3
4
5
6
7
8
9
P205BP205B
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16
P209BP209B
1 2 3 4 5
P101AP101A1
2
3
4
5
6
7
8
9
P101AP101A1
2
3
4
5
6
7
8
9
1 2
P505BP505B
1
2
3
4
P617BP617B
1
2
3
4
5
6
7
8
9
P612BP612B
1
2
3
4
5
6
7
8
9
P602BP602B
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16
P102AP102A
1
2
3
4
5
6
7
8
9
1 2 3 4 5
P506BP506B
1 2 3 4
FAN3FAN3
1
2
12
3
P609BP609B 1
2
3
4
5
6
7
8
9
P604BP604B 1
2
3
4
5
6
7
8
9
tt
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
P101AP101A1
2
3
4
5
6
7
8
9
P208BP208B
1 2 3 4 5
1 2
P614BP614B
1
2
3
4
5
6
7
8
9
P623BP623B
1 2
P102AP102A
1
2
3
4
5
6
7
8
9
P501BP501B
1 2
1 2 3 4 5
P102AP102A
1
2
3
4
5
6
7
8
9
P606BP606B 1
2
3
4
5
6
7
8
9
- 7 -
WIRING DIAGRAM

INPUT
OFFSET
ISCTRIG
+62V
SEN
62V
TESTPOINT 5
+12V
-12V
+12V
-12V
+12V
-12V
-12V
OFFSET
+62V
SEN
ISC
62V
INPUT
TP5
SC NPN
SC PNP
/1KV
/1/2W
/1%
TEMP SEN
All Polyester capacitors are 63V unless noted.
All Elec. capacitors are 50V unless noted.
All Resistor are 1/6W RJ13 unless noted.
/1KV
/1KV
/1KV
/1%
/1%
/1%
/3W
/1%
/1%
INPUT BUFFER
/16V
/1KV
ISC COMPARATOR
/1%
I/V
/1/2W
/1KV
/1KV
/1KV
SMD 0805
SMD 0805
C103
180pF
C103
180pF
C108
10nF
C108
10nF
CW
RV104
100K
CW
RV104
100K
13
2
Q144
MPSA92
Q144
MPSA92
R117
82
R117
82
R1E3
1.5K
R1E3
1.5K
+
C149
1uF
+
C149
1uF
D134
1N4148
D134
1N4148
R1A7
0.05
R1A7
0.05
R106
1K
R106
1K
C102
22pF
C102
22pF
R116
1.8K
R116
1.8K
R1A2
10K
R1A2
10K
R120
1K
R120
1K
Q145
2SC4793
Q145
2SC4793
R1A6
47K
R1A6
47K
R110
1K
R110
1K
C153
470pF
C153
470pF
R118
470
R118
470
R123
100
R123
100
C111
100nF
C111
100nF
R115
1K
R115
1K
+
C151
1uF
+
C151
1uF
R121
1K
R121
1K
R111
ATO
R111
ATO
Q110
2SC1815
Q110
2SC1815
+
C110
100uF
+
C110
100uF
Q109
2SC2240
Q109
2SC2240 C116
22pF
C116
22pF
C115
1nF
C115
1nF
D130
6.8V
D130
6.8V
D135
1N5404
D135
1N5404
R112
976
R112
976
R109
82
R109
82
D132
BAV21
D132
BAV21
C107
15pF
C107
15pF
R1A9
6.8K
R1A9
6.8K
R1A5
220K
R1A5
220K
J101
RCA
J101
RCA
1
2
+
-
IC104A
TL082CP
+
-
IC104A
TL082CP
3
2
1
Q104
2SC2240
Q104
2SC2240
R102
2.2meg
R102
2.2meg
R119
2.2meg
R119
2.2meg
D133
1N4148
D133
1N4148
R199
220K
R199
220K
R1G1
100
R1G1
100
+
C113
1uF
+
C113
1uF
Q112
2SK170
Q112
2SK170
D101
1N4148
D101
1N4148
R114
22K
R114
22K
C101
1nF
C101
1nF
Q106
2SC2240
Q106
2SC2240
R1E1
3.3K
R1E1
3.3K
F101
T6.3AL/250V
F101
T6.3AL/250V
R1A1
220K
R1A1
220K
G1G1
Ground Solder Tap
G1G1
Ground Solder Tap
1
C106
10pF
C106
10pF
Q101
2SA970
Q101
2SA970
C100
180pF
C100
180pF
R1A3
470K
R1A3
470K
C114
100nF
C114
100nF
+
-
IC104B
TL082CP
+
-
IC104B
TL082CP
5
67
84
R1E0
470K
R1E0
470K
Q113
2SA970
Q113
2SA970
Q111
2SA1015
Q111
2SA1015
R1E2
33K
R1E2
33K
Q103
2SA970
Q103
2SA970
R113
82
R113
82
C1G1
100nF
C1G1
100nF
Q108
2SA970
Q108
2SA970
D131
4.7V
D131
4.7V
Q107
2SC2240
Q107
2SC2240
+
C148
1uF
+
C148
1uF
R108
1K
R108
1K
C104
1nF
C104
1nF
Q100
2SK170
Q100
2SK170
R1A4
220K
R1A4
220K
R198
100K
R198
100K
C105
47pF
C105
47pF
R122
100
R122
100
Q105
2SC2240
Q105
2SC2240
Q143
MPSA92
Q143
MPSA92
R103
470
R103
470
CW
RV103
500
CW
RV103
500
13
2
C109
22pF
C109
22pF
R100
470
R100
470
R1A0
390K
R1A0
390K
R105
2.2meg
R105
2.2meg
R101
47
R101
47
D100
1N4148
D100
1N4148
CW
RV101
5KA
CW
RV101
5KA
13
2
4 5
R1A8
100
R1A8
100
+
C150
1uF
+
C150
1uF
R104
1K
R104
1K
Q102
2SK170
Q102
2SK170
R107
1K
R107
1K
+
C112
1uF
+
C112
1uF
D129
BAV21
D129
BAV21
SCHEMATICS DIAGRAM
- 8 -

+62V
-62V+68V
ISCTRIG
AGND
SC NPN
OUTPUTOUTPUT
AC OFF
AGND
-62V
AGND
AC OFF
SC PNP
-62V
SEN
-18V
PROTECT
-68V
+62V+18V
OFFSET
ISCTRIG
TP2
TP1
SEN
OFFSET
AGND
SC NPN
SC PNP
AGND
TP5
TP5
SEN
AGNDAGND
-18V-18V
PROTECTPROTECTPROTECTPROTECT
+68V
-68V
+68V
AGND
+18V
AC OFF
-62V
-68V
-18V
PROTECT
+62V
+12V
+12V
+12V
-12V
-12V
+12V
-12V
-12V
+12V
+12V
OFFSET
+62V
62V
SC NPN
SC PNP
INPUT
ISC
TP5
SEN
POWER ON/OFF DETECT DC OFFSET DETECT
CURRENT DETECT
MUST USE UL&CSA CERTIFIED
/1%
/1KV
/1KV
/1KV
/250V
/1KV
/250V
/250V
/25V
/25V
/25V
/25V
/25V
CONNECT TO CONNECTION BOARD COPPER STRIPS
/1/2W
/1W
/1W
/1W
/2W
/5W /5W
/5W
/5W
/1W
/1W
/1%
/1%
IDLING CURRENT SETTING:
ADJUST RV102 LET VOLTAGE BETWEEN TP101 AND TP102: 17.6mV
FAN&ISC SENSITIVITY SETTING
ADJUST RV103 LET VOLTAGE AT SEN PORT: +750mV/25Deg
RESISTORS ARE CARBON FILM 1/6W UNLESS SPECIFIED
OUT
ec
b
GND
e
GND
2SK170
TO-92
OUT
TO-220
2SA1837
2SC4793
IN
b
2SA970
2SA1015
2SC1815
2SC2240
bc
TO-92 TO-92
2N4403
MPSA42
MPSA92
SG
ec
TO-220
c
NJM79M12A
b
2SA1360
2SC3423
IN
TO-126 TO-220
D
e
NJM78M12A
ebc
2SA1943
2SC5200
TO-264
/1/4W
/1/2W
/1KV
/16V
/16V
/1KV
/6.3V
All Polyester capacitors are 63V unless noted.
All Elec. capacitors are 50V unless noted.
All Resistor are 1/6W RJ13 unless noted.
/1KV
/1KV
/250V
/1KV
/250V
/250V
/100V
/100V
/1KV
/1KV
/1/4W
/1/4W
TP2
TP1
SEN
OFFSET
TP5
AGND
Q119
2SA1015
Q119
2SA1015
R130
1K
R130
1K
R1N4
220K
R1N4
220K
C133
470pF
C133
470pF
Q118
2SA1015
Q118
2SA1015
D113
1N4148
D113
1N4148
D119
1N4148
D119
1N4148
+
C117
100uF
+
C117
100uF
R134
100
R134
100
R1P6
2K
R1P6
2K
C156
100nF
C156
100nF
D114
1N4148
D114
1N4148
Q125
2SC2240
Q125
2SC2240
R180
10K
R180
10K
R137
180
R137
180
R150
3.9K
R150
3.9K
R1P1
2K
R1P1
2K
R127
4.7K
R127
4.7K
R132
100
R132
100
R184
20K
R184
20K
Q127
MPSA92
Q127
MPSA92
C161
47nF
C161
47nF
R147
47K
R147
47K
R158
2.2
R158
2.2
R1P4
100
R1P4
100
D109
L-513AD
D109
L-513AD
R142
1K
R142
1K
C135
68pF
C135
68pF
R124
10K
R124
10K
+
C157
10uF
+
C157
10uF
R195
100K
R195
100K
R161
2.2
R161
2.2
P102A
MOLEX 41662 RIGHT ANGLE
P102A
MOLEX 41662 RIGHT ANGLE
11
22
33
44
55
66
77
88
99
R189
510K
R189
510K
D127
1N4148
D127
1N4148
R162
0.22
R162
0.22
P101A
MOLEX 41662 RIGHT ANGLE
P101A
MOLEX 41662 RIGHT ANGLE
11
22
33
44
55
66
77
88
99
R143
100
R143
100
C141
100nF
C141
100nF
D124
1N4148
D124
1N4148
R157
100
R157
100
C123
100nF
C123
100nF
Q131
2SA1837
Q131
2SA1837
C120
100nF
C120
100nF
+
C127
100uF
+
C127
100uF
D139
1N4148
D139
1N4148
CB101
90deg THERMAL CIRCUIT BREAKER
CB101
90deg THERMAL CIRCUIT BREAKER
1 2
R165
0.22
R165
0.22
C129
10nF
C129
10nF
D128
1N4148
D128
1N4148
+
C122
100uF
+
C122
100uF
RNI3
N.I.
RNI3
N.I.
+
C134 1000uF
+
C134 1000uF
R164
0.22
R164
0.22
R139
100
R139
100
R1N6
220
R1N6
220
R145
2.78K
R145
2.78K
R152
1.43K
R152
1.43K
R181
22K
R181
22K
D138
BAV21
D138
BAV21
R197
20K
R197
20K
R192
2.21K
R192
2.21K
CW
RV102
300
CW
RV102
300
13
2
D120
1N4148
D120
1N4148
Q114
2SC2240
Q114
2SC2240
R172
10K
R172
10K
R160
2.2
R160
2.2
C143
N.I.
C143
N.I.
D110
BAV21
D110
BAV21
Q142
2N4403
Q142
2N4403
D108
1N4148
D108
1N4148
R178
2.7
R178
2.7
R1P3
100
R1P3
100
C121
100nF
C121
100nF
R1N3
33K
R1N3
33K
Q116
2SC1815
Q116
2SC1815
R148
100K
R148
100K
D125
N.I.
D125
N.I.
R1H2
100
R1H2
100
Q128
MJE340
Q128
MJE340
R163
0.22
R163
0.22
R171
22K
R171
22K
Q132
2SC5200
Q132
2SC5200
R1H1
100
R1H1
100
R1N5
220
R1N5
220
Q117
2SC1815
Q117
2SC1815
RNI5
N.I.
RNI5
N.I.
RNI4
N.I.
RNI4
N.I.
C131
470nF
C131
470nF
R186
1meg
R186
1meg
R159
2.2
R159
2.2
Q134
2SC5200
Q134
2SC5200
R175
10K
R175
10K
F102
T6.3AL/250V
F102
T6.3AL/250V
Q148
MPSA92
Q148
MPSA92
+
C154
10uF
+
C154
10uF
+
C124
10uF
+
C124
10uF
D140
BAV21
D140
BAV21
Q115
2SC2240
Q115
2SC2240
Q133
2SA1943
Q133
2SA1943
R155
10
R155
10
D107
L-513AD
D107
L-513AD
Q130
2SC4793
Q130
2SC4793
+
-
IC103B
TL084BCD
+
-
IC103B
TL084BCD
5
67
P103A
6PIN2.54
P103A
6PIN2.54
1
1
2
2
3
3
4
4
5
5
6
6
J103
RED
J103
RED
R176
100K
R176
100K
Q138
MPSA42
Q138
MPSA42
D136
BAV21
D136
BAV21
R135
180
R135
180
+
C158
10uF
+
C158
10uF
CNI4
22pF
CNI4
22pF
D102
1N4148
D102
1N4148
Q126
2SC3423
Q126
2SC3423
R174
100K
R174
100K
CNI1
N.I.
CNI1
N.I.
Q135
2SA1943
Q135
2SA1943
R170
22K
R170
22K
R136
22K
R136
22K
BUS101
COPPER STRIPS
BUS101
COPPER STRIPS
C152
1nF
C152
1nF
R187
10K
R187
10K
D126
1N4148
D126
1N4148
R173
22K
R173
22K
Q129
MJE350
Q129
MJE350
CNI2
N.I.
CNI2
N.I.
Q124
2SC3423
Q124
2SC3423
J104
WHITE
J104
WHITE
Q147
MPSA92
Q147
MPSA92
Q141
MPSA92
Q141
MPSA92
Q139
MPSA92
Q139
MPSA92
R140
100
R140
100
R144
100
R144
100
+
C155
10uF
+
C155
10uF
R128
1meg
R128
1meg
Q137
MPSA92
Q137
MPSA92
CNI8
47pF
CNI8
47pF
R1P2
2K
R1P2
2K
R185
20K
R185
20K
R125
680
R125
680
D112
1N4148
D112
1N4148
CNI9
47pF
CNI9
47pF
D121
1N4148
D121
1N4148
R1N7
2K
R1N7
2K
C119
1000pF
C119
1000pF
+
C139
4.7uF
+
C139
4.7uF
R146
100K
R146
100K
R191
20K
R191
20K
+
C145
100uF
+
C145
100uF
RL101
JQX-115F/024/1HS1
RL101
JQX-115F/024/1HS1
34
1
2
+
C128
10uF
+
C128
10uF
Q140
MPSA42
Q140
MPSA42
D104
1N4148
D104
1N4148
RNI2
N.I.
RNI2
N.I.
R138
22K
R138
22K
D103
1N4148
D103
1N4148
R183
220K
R183
220K
L101
0.7uH
L101
0.7uH
R131
1K
R131
1K
C136
68pF
C136
68pF
C162
N.I.
C162
N.I.
Q122
2SA970
Q122
2SA970
C126
100nF
C126
100nF
CNI5
22pF
CNI5
22pF
CNI6
100nF
CNI6
100nF
R177
3.3
R177
3.3
D106
1N4148
D106
1N4148
C132
470pF
C132
470pF
R169
4.7K
R169
4.7K
Q123
2SA1360
Q123
2SA1360
C125
10nF
C125
10nF
R141
1K
R141
1K
R1N2
33K
R1N2
33K
C160
47nF
C160
47nF
D116
1N4148
D116
1N4148
G1G2
N.I.
G1G2
N.I.
1
R133
100
R133
100
C142
10nF
C142
10nF
+
C147
22uF
+
C147
22uF
RNI1
N.I.
RNI1
N.I.
R126
220
R126
220
R193
20K
R193
20K
R168
22K
R168
22K
R182
3.3K
R182
3.3K
Q149
MPSA42
Q149
MPSA42
R149
47K
R149
47K
R194
10K
R194
10K
R154
10
R154
10
Q120
2SA970
Q120
2SA970
R196
100
R196
100
C130
470nF
C130
470nF
C118
100nF
C118
100nF
D105
1N4148
D105
1N4148
+
C146
22uF
+
C146
22uF
R179
N.I.
R179
N.I.
D111
1N4148
D111
1N4148
+
-
IC103A
TL084BCD
+
-
IC103A
TL084BCD
3
21
411
R153
33
R153
33
R151
1K
R151
1K
R1N1
220K
R1N1
220K
R1P5
2K
R1P5
2K
+
-
IC103C
TL084BCD
+
-
IC103C
TL084BCD
10
9
8
D117
1N4148
D117
1N4148
R190
20K
R190
20K
W101
JUMPER
W101
JUMPER
R1H3
10K
R1H3
10K
IC102
NJM78M12FA
IC102
NJM78M12FA
O3 I
1
G
2
C137
100nF
C137
100nF
C144
180pF
C144
180pF
D137
1N4148
D137
1N4148
IC101
NJM79M12FA
IC101
NJM79M12FA
G
1
O3 I
2
+
-
IC103D
TL084BCD
+
-
IC103D
TL084BCD
12
13 14
R129
1meg
R129
1meg
Q146
MPSA42
Q146
MPSA42
CNI3
15pF
CNI3
15pF
D122
1N4148
D122
1N4148
+
C138
22uF
+
C138
22uF
D123
1N4148
D123
1N4148
CNI7
100nF
CNI7
100nF
R1N8
2K
R1N8
2K
R156
1K
R156
1K
C159
1nF
C159
1nF
Q121
2SA970
Q121
2SA970
D115
BAV21
D115
BAV21
C140
22nF
C140
22nF
R188
51K
R188
51K
SCHEMATICS DIAGRAM
- 9 -

SEN5
SEN3
SEN1
SEN2
SEN3
SEN7
FAN1FAN1
SEN6
SEN4
SEN5
-70V
FAN1
FAN2
+18V
+70V
AGND4
-18V
ACOFF
-62V_3
AGND6
-62V_4
AGND4
FAN3
AGND1
+62V_4
-62V_4
AGND4
+62V_4FAN2
+62V_3
AGND6
FAN3FAN3
AGND6
+62V_3
-62V_3
DGND
OFF1
OFF2
OFF3
OFF1
OFF2
OFF3
STBY
+62V_4
-70V-70V
+70V
+18V+18V
STBYLED
+62V_3+62V_3
-62V_4
+5VD
+8V
ACOUT
RELAY
ACIN
-62V_3
-18V
ACOFF
DGND
ISCTRIG[1..7]
ISCTRIG_5
ISCTRIG_7
ISCTRIG_6
ISCTRIG_2
ISCTRIG_3
ISCTRIG_1
ISCTRIG_4
FAN1
AC CURRENT SENS
DGND
AGND6
AGND4
STBY
STBY
+8V
+8V
PROT4
PROT3
PROT5
PROT2
PROT6
PROT1
PROT7
DGND
DGND
SCLED
SCLED
DGND
SEN1
SEN2
SEN7
SEN3
SEN6
SEN4
SEN5
ISCTRIG_1
ISCTRIG_2
ISCTRIG_3
ISCTRIG_4
ISCTRIG_5
ISCTRIG_6
ISCTRIG_7
DGND
+12VD
SCLED PROT1
PROT2
PROT3
PROT4
PROT5
PROT6
PROT7
DGND
PROT3
PROT4
PROT5
STBYLED
+5VD
DGND
+70V
ACOFF
-62V_4
-18V
-70V
-62V_3
+18V
+62V_3
+62V_4
+12VD
-12VD
+12VD
+12VD
+12VD
-12VD
+12VD
+12VD
-12VD
+12VD
+12VD
+12VD
+12VD
+12VD
+12VD
-12VD
+12VD
-12VD
+18V +18V
/1%
/1%
/1%
/1%
/1%
/1%
/1%
/1%
/1%
/1%
/1%
/1%
TO AMP CONNECTION BOARD
/1/2W
/1%
/1% /1/2W
/1/2W
/1%
/1%
/1KV
FOR Q202
FOR BR205&Q237
FOR IC205
FOR IC202
/1/4W
FOR Q201
FOR BR204&Q236
FOR Q205 FOR Q220
FOR Q206
/35V
/1/2W
/1/2W
/1/2W
/1/2W
FOR Q219
FOR BR206&Q238
/35V
FOR Q239
FOR Q218
/100V
/100V
/100V
/100V/100V
/100V
/100V
/1KV
/100V
/100V
/100V
/100V
/100V
/1KV
/100V
/100V
/35V
/35V
/35V
/35V
/25V
/25V
/250V
/250V
/80V
/250V
/80V
/35V
/1/2W
/1/2W
/35V
/100V
/1%
/1%
/1%
/250V /250V
/250V /250V
/80V
/80V
/250V
/250V
/250V /250V
/250V /250V
/80V
/80V
/100V /100V
/100V
FOR IC201
/1/2W /1/2W /1/2W /1/2W
/1/2W /1/2W /1/2W
/1/2W
/1/2W
/1/2W
TO FRONT DISPLAY BOARD
All Polyester capacitors are 63V unless noted.
All Elec. capacitors are 50V unless noted.
All Resistor are 1/6W RJ13 unless noted.
/1%
/1%
/1/4W /100V
/1/2W
/1/2W
/1/2W
/1/2W
/25V
TEST POINT
The J202&J203 links should be shorted
during the test for 8ohms load and
should be resumed after the test.
/16V
/1/2W
/5W
/1/2W
/1/2W
R294
10K
R294
10K
C263
100nF
C263
100nF
R211
470
R211
470
C262
220pF
C262
220pF
R2E6
1K
R2E6
1K
R207
1.5K
R207
1.5K
R222
1.8K
R222
1.8K
+
C213
3300uF
+
C213
3300uF
Q211
2SA1015
Q211
2SA1015
+
C267
10uF
+
C267
10uF
+
C253
27000uF
+
C253
27000uF
D227
1N4148
D227
1N4148
Q216
2SB647
Q216
2SB647
R267
10K
R267
10K
+
-
IC206B
TL082CP
+
-
IC206B
TL082CP
5
6
7
84
C250
2.2nF
C250
2.2nF
R2H1
8.2
R2H1
8.2
Q231
2SC1815
Q231
2SC1815
R220
10.2K
R220
10.2K
~
~
+-
BR203
DB104G
~
~
+-
BR203
DB104G
~
~
+-
BR205
KBJ2506
~
~
+-
BR205
KBJ2506
C261
1uF
C261
1uF
R279
3.3K
R279
3.3K
R253
1K
R253
1K
~
~
+-
BR201
DB104G
~
~
+-
BR201
DB104G R213
10
R213
10
Q240
2SC1775
Q240
2SC1775
R286 10KR286 10K
HS204
70-046006-0
HS204
70-046006-0
R229
4.7K
R229
4.7K
D219
4.3V
D219
4.3V
P201A
13-13908-00
P201A
13-13908-00
11
22
33
44
55
66
77
88
R2A8
10K
R2A8
10K
BUS203
COPPER STRIP
BUS203
COPPER STRIP
R292
10K
R292
10K
+
C269
10uF
+
C269
10uF
R2A4
10K
R2A4
10K
P203A
10PIN2.0-A60B
P203A
10PIN2.0-A60B
2
3
4
1
5
6
7
8
9
10
D211
8.2V
D211
8.2V
BUS206 COPPER STRIPBUS206 COPPER STRIP
Q234
2SC1775
Q234
2SC1775
Q228
2SC1815
Q228
2SC1815
Q233
2SC1815
Q233
2SC1815
C252
2.2nF
C252
2.2nF
R231
10K
R231
10K
C230
47pF
C230
47pF
Q237 30TPS08Q237 30TPS08
3
1 2
J203
2PIN2.54-C
J203
2PIN2.54-C
1 2
R223
1.8K
R223
1.8K
R283
10K
R283
10K
C220
10nF
C220
10nF
Q218
KSC2690AYS
Q218
KSC2690AYS
C257
100nF
C257
100nF
J202
2PIN2.54-C
J202
2PIN2.54-C
1 2
HS203
70-046006-0
HS203
70-046006-0
R208
1.5K
R208
1.5K
D224
1N4148
D224
1N4148
IC205
LM7806CT
IC205
LM7806CT
O3 I
1
G
2
HS213
70-010003-1
HS213
70-010003-1
C205
10nF
C205
10nF
R206
100
R206
100
C229
100nF
C229
100nF
R240
47
R240
47
CW
RV201
1K
CW
RV201
1K
1 3
2
D215
4.3V
D215
4.3V
D208
1N4148
D208
1N4148
C244
2.2nF
C244
2.2nF
Q201
KSA1 220AYS
Q201
KSA1 220AYS
R256
1K
R256
1K
R2A3
10
R2A3
10
+
C238
10uF
+
C238
10uF
HS202
70-046006-0
HS202
70-046006-0
D207
1N4148
D207
1N4148
Q214
2SC1815
Q214
2SC1815
+
C215
100uF
+
C215
100uF
R233
10K
R233
10K
R2A5
10K
R2A5
10K
R2E1
1K
R2E1
1K
R228
15K
R228
15K
+
C217
47uF
+
C217
47uF
R2F2
20K
R2F2
20K
+
C240
10uF
+
C240
10uF
R274
100
R274
100
R230
1K
R230
1K
R2E3
180
R2E3
180
R284 10KR284 10K
Q219
KSC2690AYS
Q219
KSC2690AYS
HS205
70-046006-0
HS205
70-046006-0
+
-
IC206A
TL082CP
+
-
IC206A
TL082CP 3
2
1
R2H2
10K
R2H2
10K
R281
10K
R281
10K
R202
1K
R202
1K
R237
1K
R237
1K
R210
2K
R210
2K
R276
3.3K
R276
3.3K
~
~
+-
BR206
KBJ2506
~
~
+-
BR206
KBJ2506
R2E2
10K
R2E2
10K
C219
10nF
C219
10nF
R278
3.3K
R278
3.3K
+
C227
47uF
+
C227
47uF
C206
100nF
C206
100nF
R2E9
20K
R2E9
20K
+
-
IC203C
TL084CN
+
-
IC203C
TL084CN
10
98
R289 10KR289 10K
R272
43K
R272
43K
R2F6
N.I.
R2F6
N.I.
R245
1K
R245
1K
F204
T1.6AL/250V
F204
T1.6AL/250V
C210
10nF
C210
10nF
R2F5
0
R2F5
0
HS210
70-046005-0
HS210
70-046005-0
P202A
13-13908-00
P202A
13-13908-00
11
22
33
44
55
66
77
88
CONTACTS UPSIDE
P205B
FLAT 1mm CONNECTOR
CONTACTS UPSIDE
P205B
FLAT 1mm CONNECTOR
SEN3 4
SEN7 3
SEN2 2
SEN1 1
DGND 16
ISCTRIG_7 15
ISCTRIG_6 14
ISCTRIG_5 13
ISCTRIG_4 12
ISCTRIG_3 11
ISCTRIG_2 10
ISCTRIG_1 9
SEN5 8
NC 7
SEN4 6
SEN6 5
R239
1K
R239
1K
R2A9
10K
R2A9
10K
IC202 LM7912CT IC202 LM7912CT
G1
O3 I
2
C272
100nF
C272
100nF
CONTACTS UPSIDE
P204B
FLAT 1mm CONNECTOR
CONTACTS UPSIDE
P204B
FLAT 1mm CONNECTOR
+8V 4
+8V 3
STBY 2
STBY 1
DGND 16
SCLED 15
SCLED 14
DGND 13
DGND 12
PROT7 11
PROT1 10
PROT6 9
PROT2 8
PROT5 7
PROT3 6
PROT4 5
Q204
2SA1015
Q204
2SA1015
C266
100nF
C266
100nF
R2A7
10K
R2A7
10K
R209
10K
R209
10K
+
C233
100uF
+
C233
100uF
+
C209
10uF
+
C209
10uF
C242
10nF
C242
10nF
R243
10K
R243
10K
R235
1K
R235
1K
HS211
70-010003-1
HS211
70-010003-1
R298
10K
R298
10K
R293
10K
R293
10K
Q230
2SC1815
Q230
2SC1815
J201
2PIN2.54-C
J201
2PIN2.54-C
1
2
C212
10nF
C212
10nF
Q225
2SC1815
Q225
2SC1815
P209B
5P3.96-C
P209B
5P3.96-C
11
22
33
44
55
D230
1N4148
D230
1N4148
R299
100
R299
100
R265
10K
R265
10K
D232
13V
D232
13V
D228
1N4148
D228
1N4148
+
C270
10uF
+
C270
10uF
+
-
IC203D
TL084CN
+
-
IC203D
TL084CN
12
13 14
IC204B
SN74HC21N
IC204B
SN74HC21N
1
2
4
5
6
R266
10K
R266
10K
D220
6.8V
D220
6.8V
R216
1.8K
R216
1.8K
C222
10nF
C222
10nF
HS212
70-010003-1
HS212
70-010003-1
Q232
2SC1815
Q232
2SC1815
Q227
2SD667
Q227
2SD667
+
C216
100uF
+
C216
100uF
C223
10nF
C223
10nF
+
C218
47uF
+
C218
47uF
D221
6.8V
D221
6.8V
Q235
2SA872
Q235
2SA872
R291
1K
R291
1K
D202
1N4148
D202
1N4148
+
C203
3300uF
+
C203
3300uF
Q205
2SC4793
Q205
2SC4793
BUS201 COPPER STRIPBUS201 COPPER STRIP
Q206
2SA1837
Q206
2SA1837
C211
10nF
C211
10nF
Q229
2SC1815
Q229
2SC1815
C204
10nF
C204
10nF
R261
10K
R261
10K
D201
1N4148
D201
1N4148
Q223
2SC1815
Q223
2SC1815
C236
100nF
C236
100nF
HS214
70-046006-0
HS214
70-046006-0
R296
10K
R296
10K
R264
10K
R264
10K
R295
10K
R295
10K
F203
T1.6AL/250V
F203
T1.6AL/250V
R247
47
R247
47
R219
220
R219
220
Q213
2SD667
Q213
2SD667
R273
100
R273
100
IC204A
SN74HC21N
IC204A
SN74HC21N
13
12
10
9
8
147
C245
2.2nF
C245
2.2nF
C256
10nF
C256
10nF
Q222
2SC1815
Q222
2SC1815
C237
100nF
C237
100nF
C249
2.2nF
C249
2.2nF
R250
470
R250
470
Q202
KSC2690AYS
Q202
KSC2690AYS
+
C224
1000uF
+
C224
1000uF
C258
10nF
C258
10nF
D234
1N4148
D234
1N4148
R251
1K
R251
1K
D222
6.8V
D222
6.8V
D210
8.2V
D210
8.2V
R297
10K
R297
10K
R225
1.8K
R225
1.8K
R2F1
10K
R2F1
10K
+
-
IC203B
TL084CN
+
-
IC203B
TL084CN
5
67
R236
1K
R236
1K
HS206
70-046006-0
HS206
70-046006-0
HS201
70-046006-0
HS201
70-046006-0
R227
12K
R227
12K
R246
1K
R246
1K
D223
1N4148
D223
1N4148
R2A6
10K
R2A6
10K
R204
2.2K
R204
2.2K
+
C248
22000uF
+
C248
22000uF
+
C277
10uF
+
C277
10uF
HS208
70-046005-0
HS208
70-046005-0
C260
1uF
C260
1uF
Q217
2SD667
Q217
2SD667
BUS204
COPPER STRIP
BUS204
COPPER STRIP
R269
10K
R269
10K
D236
3.3V
D236
3.3V
BUS205
COPPER STRIP
BUS205
COPPER STRIP
R275
100
R275
100
R248
1K
R248
1K
+
C268
10uF
+
C268
10uF
R252
100K
R252
100K
R249
47
R249
47
+
C255
2200uF
+
C255
2200uF
Q208
2SC1775
Q208
2SC1775
+
-
IC203A
TL084CN
+
-
IC203A
TL084CN
3
21
411
R2A1
10
R2A1
10
Q210
2SC1815
Q210
2SC1815
+
C225
1000uF
+
C225
1000uF
R2H4
10K
R2H4
10K
Q220
KSC2690AYS
Q220
KSC2690AYS
R2F3
10K
R2F3
10K
R215
1.8K
R215
1.8K
HS207
70-046005-0
HS207
70-046005-0
R285 10KR285 10K
C271
100nF
C271
100nF
D225
1N4148
D225
1N4148
R2E5
100K
R2E5
100K
R270
43K
R270
43K
D213
4.3V
D213
4.3V
R2E7
1K
R2E7
1K
C274
100nF
C274
100nF
R212
470
R212
470
R2H3
10K
R2H3
10K
P207A
6PIN2.0-A100B
P207A
6PIN2.0-A100B
2
3
4
1
5
6
D216
4.3V
D216
4.3V
Q241
2SA872
Q241
2SA872
+
C232
47uF
+
C232
47uF
Q226
2SC1815
Q226
2SC1815
D203
1N4148
D203
1N4148
R2A2
10
R2A2
10
C246
2.2nF
C246
2.2nF
R290 10KR290 10K
+
C254
27000uF
+
C254
27000uF
D209
1N4148
D209
1N4148
+
C235
10uF
+
C235
10uF
D212
5.1V
D212
5.1V
R244
1K
R244
1K
R257
10K
R257
10K
R201
1K
R201
1K
C234
47pF
C234
47pF
R268
10K
R268
10K
D206
1N4007
D206
1N4007
D231
1N4148
D231
1N4148
Q221
2SC1815
Q221
2SC1815
+ C214
3300uF
+ C214
3300uF
R262
10K
R262
10K
Q215
2SA1015
Q215
2SA1015
+
C226
10uF
+
C226
10uF
Q209
2SA872
Q209
2SA872
P206B
FLAT 1mm CONNECTOR
P206B
FLAT 1mm CONNECTOR
12
34
56
78
910
11 12
13 14
15 16
HS209
70-046005-0
HS209
70-046005-0
R2F4
10K
R2F4
10K
R2E4
1K
R2E4
1K
P208B
5P7.5-C
P208B
5P7.5-C
11
22
33
44
55
R242
10K
R242
10K
R277
3.3K
R277
3.3K
C259
1uF
C259
1uF
R259
100
R259
100
R232
10K
R232
10K
D217
4.3V
D217
4.3V
+
C247
22000uF
+
C247
22000uF
R214
1.8K
R214
1.8K
C241
10nF
C241
10nF
R224
10
R224
10
D235
3.3V
D235
3.3V
Q239 30TPS08Q239 30TPS08
3
1 2
R254
470
R254
470
C243
2.2nF
C243
2.2nF
R260
2K
R260
2K
R255
4.7K
R255
4.7K
~
~
+-
BR208
DB104G
~
~
+-
BR208
DB104G
D218
4.3V
D218
4.3V
+
C208
10uF
+
C208
10uF
+
C264
100uF
+
C264
100uF
C221
10nF
C221
10nF
C201
10nF
C201
10nF
Q236 30TPS08Q236 30TPS08
3
12
~
~
+-
BR202
DB104G
~
~
+-
BR202
DB104G
BUS202 COPPER STRIPBUS202 COPPER STRIP
+
C228
100uF
+
C228
100uF
C265
100nF
C265
100nF
G2G1
Ground Solder Tap
G2G1
Ground Solder Tap
1
D226
1N4148
D226
1N4148
C207
100nF
C207
100nF
Q238 30TPS08Q238 30TPS08
3
12
C275
100nF
C275
100nF
R241
10K
R241
10K
R287 10KR287 10K
R2E8
10K
R2E8
10K
F201
T1.6AL/250V
F201
T1.6AL/250V
D229
1N4148
D229
1N4148
R282
10K
R282
10K
R234
10K
R234
10K
C273
100nF
C273
100nF
+
C276
10uF
+
C276
10uF
R263
10K
R263
10K
C251
2.2nF
C251
2.2nF
D214
4.3V
D214
4.3V
F202
T1.6AL/250V
F202
T1.6AL/250V
R271
43K
R271
43K
R218
2.2K
R218
2.2K
R226
220
R226
220
R203
2.2K
R203
2.2K
Q224
2SC1815
Q224
2SC1815
IC201 LM7812CT IC201 LM7812CT
O3 I
1
G
2
R288 10KR288 10K
D205
1N4148
D205
1N4148
Q203
2SC1815
Q203
2SC1815 R217
220
R217
220
+
C239
10uF
+
C239
10uF
R280
10K
R280
10K
Q212
2SB647
Q212
2SB647
~
~
+-
BR207
KBJ2506
~
~
+-
BR207
KBJ2506
R205
100
R205
100
R221
2.1K
R221
2.1K
+
C202
3300uF
+
C202
3300uF
Q207
2SC1775
Q207
2SC1775
R238
47
R238
47
D233
1N4148
D233
1N4148
+
C231
10uF
+
C231
10uF
~
~
+-
BR204
KBJ2506
~
~
+-
BR204
KBJ2506
D204
1N4148
D204
1N4148
R258
10K
R258
10K
SCHEMATICS DIAGRAM
- 10 -

PROT6
STBYLED
PROT5
PROT4
PROT4
PROT5
PROT2
SCLED
PROT3
PROT3
PROT1
+12VD
SCLED
+12VD
+5VD
PROT7
DGND
DGND
+5VD
STBYLED
PROT1 PROT2 PROT3 PROT4 PROT5 PROT6
PROT7
All Polyester capacitors are 63V unless noted.
All Elec. capacitors are 50V unless noted.
All Resistor are 1/6W unless noted.
STBYLED is +0.7V at normal working condition and is +5V at STNADBY mode.
PROT1-PROT7 each is +10.5V at normal working condition.When any
channel is in protection,the relevant PROT will be at -10.5V.
SCLED is floating at normal working condition,when Softclipping mode,
SCLED be connect to GND.
STANDBY LED
SOFT CLIPPING LED
/16V
CH1 LED
/1/2W
CH2 LED CH3 LED CH4 LED CH5 LED CH6 LED CH7 LED
R306
510
R306
510
Q325
2SA1015
Q325
2SA1015
D308
BL-BJLB4274
D308
BL-BJLB4274
D303
BL-BUBB4274
D303
BL-BUBB4274
Q328
2SA1015
Q328
2SA1015
R336
10K
R336
10K R340 10K
R340
10K
R319
10K
R319
10K
R337
10K
R337
10K
P301A
FLEX 16PIN 1.0mm
P301A
FLEX 16PIN 1.0mm
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Q313
2SC1815
Q313
2SC1815
R332
10K
R332
10K
D306
BL-BUBB4274
D306
BL-BUBB4274
R325
10K
R325
10K
D310
1N4148
D310
1N4148
Q315
2SC1815
Q315
2SC1815
R338
10K
R338
10K R327
10K
R327
10K
R331
10K
R331
10K
R312
330
R312
330
R316
10K
R316
10K
R314
330
R314
330
R341
10K
R341
10K
R349
10K
R349
10K
Q323
2SA1015
Q323
2SA1015
R339
10K
R339
10K
D309
BL-BUBB4274
D309
BL-BUBB4274
R307
510
R307
510
Q308
2SC1815
Q308
2SC1815
R309
330
R309
330 R313 330
R313
330
Q320
2SC1815
Q320
2SC1815
R335
10K
R335
10K
D305
BL-BUBB4274
D305
BL-BUBB4274
Q316
2SC1815
Q316
2SC1815
Q307
2SA1015
Q307
2SA1015
R348
1K
R348
1K
Q330
2SC1815
Q330
2SC1815
R347
10K
R347
10K
Q303
2SA1015
Q303
2SA1015
R301
510
R301
510
Q332
2SA1015
Q332
2SA1015
Q311
2SC1815
Q311
2SC1815
Q327
2SA1015
Q327
2SA1015
Q317
2SC1815
Q317
2SC1815
Q302
2SA1015
Q302
2SA1015
R345
10K
R345
10K
R317
10K
R317
10K
D307
BL-BUBB4274
D307
BL-BUBB4274
R322
10K
R322
10K
Q314
2SC1815
Q314
2SC1815
R333
10K
R333
10K
R328
10K
R328
10K
R311
330
R311
330
R320
10K
R320
10K
R318
10K
R318
10K
D302
BL-BUBB4274
D302
BL-BUBB4274
Q333
2SC1815
Q333
2SC1815
R334
10K
R334
10K
Q324
2SA1015
Q324
2SA1015
R310
330
R310
330
R329
10K
R329
10K
Q312
2SC1815
Q312
2SC1815
R303
510
R303
510
R350
360
R350
360
Q304
2SA1015
Q304
2SA1015
R326
10K
R326
10K
D301
BL-BUBB4274
D301
BL-BUBB4274
Q306
2SA1015
Q306
2SA1015
Q334
2SD667
Q334
2SD667
R308
330
R308
330
Q310
2SC1815
Q310
2SC1815
R324
10K
R324
10K
Q329
2SA1015
Q329
2SA1015
R321
10K
R321
10K
R330
10K
R330
10K
Q322
2SA1015
Q322
2SA1015 Q321
2SC1815
Q321
2SC1815
R323
10K
R323
10K
R302
510
R302
510
Q326
2SA1015
Q326
2SA1015
Q318
2SC1815
Q318
2SC1815
R343
56
R343
56
Q319
2SC1815
Q319
2SC1815
R305
510
R305
510
R304
510
R304
510
Q301
2SA1015
Q301
2SA1015
R346
10K
R346
10K
D304
BL-BUBB4274
D304
BL-BUBB4274
+
C301
47uF
+
C301
47uF
Q309
2SC1815
Q309
2SC1815
D312
11V
D312
11V
R344
120
R344
120
Q331
2SC1815
Q331
2SC1815
Q305
2SA1015
Q305
2SA1015
R342
10K
R342
10K
R315
10K
R315
10K
SCHEMATICS DIAGRAM
- 11 -

-62V_4
STBY
-62V_3
DGNDDGNDDGNDDGND
SCP_4
+62V_3
SCLED
+62V_4
+8V
+8V
DGND
SCLED
SCN_4
SCP_3
SCN_3
+62V_3
-62V_3
SCP_4
-62V_4
+62V_4
STBY
SCP_3
SCN_4
SCN_3
SCN_3
SCP_4
DGND
STBY
SCP_3
+62V_3
+8V
-62V_3
SCLED
+62V_4
-62V_4
SCN_4
/1%
/1%
/1%
/1% /1%
/1%
/1%
/1%
/1%
/1%
/1%
/1%
/1/2W
/1/2W
/1/2W
/1/2W
/1%
All Polyester capacitors are 63V unless noted.
All Elec. capacitors are 50V unless noted.
All Resistor are 1/6W unless noted.
R410
1K
R410
1K
D401
24V
D401
24V
+
C404
10uF
+
C404
10uF
D404
24V
D404
24V
S402
SSSU122NA1
S402
SSSU122NA1
5
6
41
2
3
J401
PY301-030-100
J401
PY301-030-100
R407
1K
R407
1K
R408
1K
R408
1K
R412
1K
R412
1K
R405
1K
R405
1K
P401B
12PIN2.0-C
P401B
12PIN2.0-C
1
2
3
4
5
6
7
8
9
10
11
12
+
C403
10uF
+
C403
10uF
R404
27K
R404
27K
+
C402
10uF
+
C402
10uF
R411
1K
R411
1K
R413
1K
R413
1K
S401
SSSU142NA1
S401
SSSU142NA1
1
2
3
4
5
6
7
8
9
10
11
12
R401
27K
R401
27K
R406
1K
R406
1K
R403
27K
R403
27K
R402
27K
R402
27K
D403
24V
D403
24V
R409
1K
R409
1K
D402
24V
D402
24V
+
C401
10uF
+
C401
10uF
SCHEMATICS DIAGRAM-
- 12 -

7V
W505 ONLY FOR C VERSION
0V
W503&W504 ONLY FOR AH VERSION
ONLY USED FOR C VERSION
ONLY USED FOR AH VERSION
NEUTRAL
LIVE
TO POWER SWITCH BOARD
FROM POWER SUPPLY BOARD
FROM MAIN TRANSFORMER
TO MAIN TRANSFORMER
F1 (user accessible fuse)
M25 120V/230V TABLE
W501&W505
230V120V
NO INSERT INSERT
T20AL/250V T10AL/250V
W502,W503&W504 NO INSERTINSERT
CURRENT TRANSFORMER
Inrush Current Limiter
W503
15mm JUMPER
W503
15mm JUMPER
12
P502B
KY250
P502B
KY250
1
2
W3
14-97301-03
W3
14-97301-03
W1
14-97301-01
W1
14-97301-01
C501
100nF/275V
C501
100nF/275V
P505B
MOLEX 43160-2104
P505B
MOLEX 43160-2104
1
2
3
4
W502
7.5mm JUMPER
W502
7.5mm JUMPER
1 2
P506B
6PIN2.54-C
P506B
6PIN2.54-C
1
2
3
4
5
6
RL501
832A-1A-C-BH DC5V
RL501
832A-1A-C-BH DC5V
3
41
2
P503B
2PIN2.54-C
P503B
2PIN2.54-C
1
2
F1
FUSE HOLDER
F1
FUSE HOLDER W2
14-97301-02
W2
14-97301-02
W504
15mm JUMPER
W504
15mm JUMPER
12
W501
10mm JUMPER
W501
10mm JUMPER
1 2
P504B
2PIN3.96-C
P504B
2PIN3.96-C
1
2
U1
AC INLET
U1
AC INLET
W505
7.5mm JUMPER
W505
7.5mm JUMPER
12
t
TR501
C352 STANDBY TANS
t
TR501
C352 STANDBY TANS
1
5
10
6
2
P501B
PCFS250L
P501B
PCFS250L
1
2
TR502
DHCT3 10A/4mA
TR502
DHCT3 10A/4mA
1 2
D501
1N4148
D501
1N4148
RV501
0.5R030
RV501
0.5R030
W4
14-97301-00
W4
14-97301-00
SCHEMATICS DIAGRAM
- 13 -

AGND4
-62V_4
+62V_4
AGND4
+62V_4
AGND4
-62V_4
AGND4
+8V
AGND6
+62V_3
AGND6
-62V_3
AGND6
+62V_3
DGND
SCLED
SCN_3
SCN_4
SCP_4
+62V_3
SCP_3
-62V_3
-62V_4
+62V_4
-68V
SCN_3
+18V
ACOFF
-18V
+68V
PROT5
SEN5
SCP_3
-68V
SCN_3
+18V
ACOFF
-18V
+68V
PROT6
SEN6
SCP_3
-68V
SCN_3
+18V
ACOFF
-18V
+68V
PROT7
SEN7
SCP_3
AGND6B
+62V_3B
-62V_3B
-62V_3B
AGND6B
+62V_3B
AGND6A
+62V_3A
-62V_3A
-62V_3A
AGND6A
AGND6A
+62V_3A
+62V_3
-62V_3
-62V_3
AGND6
AGND6
+62V_3
AGND4A
+62V_4A
+62V_4A
-68V
SCN_4
+18V
ACOFF
-18V
+68V
PROT2
SEN2
SCP_4
AGND4B
+62V_4B
-62V_4B
AGND4B
-68V
SCN_4
+18V
ACOFF
-18V
+68V
PROT3
SEN3
SCP_4
AGND4
+62V_4
-62V_4
-62V_4
AGND4
+62V_4 +62V_4
-62V_4
-62V_4
AGND4
AGND4
+62V_4
-68V
SCN_4
+18V
ACOFF
+68V
PROT4
SEN4
SCP_4
STBY
AGND6B
AGND6
ISCTRIG_1 ISCTRIG_3 ISCTRIG_5 ISCTRIG_6 ISCTRIG_7
AGND4A
AGND4A
-62V_4A
-62V_4A
ISCTRIG_2
AGND4B
-62V_4B
+62V_4B
AGND4 ISCTRIG_4
AGND4
-62V_3
AGND6
STBY STBY +8V +8V PROT4 PROT3 PROT5 PROT2 PROT6 PROT1 PROT7 DGND DGND SCLED SCLED AGND SEN1 SEN2 SEN7 SEN3 SEN6 SEN4 AGND SEN5
ISCTRIG_1 ISCTRIG_2 ISCTRIG_3 ISCTRIG_4 ISCTRIG_5 ISCTRIG_6 ISCTRIG_7
DGND
DGND
ACOFF
-18V -68V
+18V
FAN3 FAN2 FAN1
+68V
AGND
DGND FAN1 DGND FAN2 DGND FAN3
+62V_4A +62V_4B +62V_4 -62V_4A -62V_4B -62V_4 AGND4A AGND4B AGND4
+62V_3 +62V_3A +62V_3B -62V_3 -62V_3A -62V_3B AGND6 AGND6A AGND6B
-68V
SCN_4
+18V
ACOFF
+68V
PROT1
SEN1
SCP_4
-18V -18V
BUS602
69-010002-0
BUS602
69-010002-0
1 2 3
P607B
13-25009-00
P607B
13-25009-00
1
2
3
4
5
6
7
8
9
P620B
13-25008-00
P620B
13-25008-00
1
2
3
4
5
6
7
8
P612B
13-25009-00
P612B
13-25009-00
1
2
3
4
5
6
7
8
9
P609B
13-25009-00
P609B
13-25009-00
1
2
3
4
5
6
7
8
9
P613B
13-25009-00
P613B
13-25009-00
1
2
3
4
5
6
7
8
9
BUS601
69-010002-0
BUS601
69-010002-0
1 2 3
P604B
13-25009-00
P604B
13-25009-00
1
2
3
4
5
6
7
8
9
P605B
13-25009-00
P605B
13-25009-00
1
2
3
4
5
6
7
8
9
CONTACTS UPSIDE
P601B1
FLAT CONNECTOR SMD16
CONTACTS UPSIDE
P601B1
FLAT CONNECTOR SMD16
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16
1718
P617B
13-25009-00
P617B
13-25009-00
1
2
3
4
5
6
7
8
9
P614B
13-25009-00
P614B
13-25009-00
1
2
3
4
5
6
7
8
9
BUS604
69-010002-0
BUS604
69-010002-0
1 2 3
BUS606
69-010002-0
BUS606
69-010002-0
1 2 3
P622B
2PIN2.54-C
P622B
2PIN2.54-C
1 2
CONTACTS UPSIDE
P601B
FLAT CONNECTOR SMD16
CONTACTS UPSIDE
P601B
FLAT CONNECTOR SMD16
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16
1718
P610B
13-25009-00
P610B
13-25009-00
1
2
3
4
5
6
7
8
9
P603B
JST2.0-10C SMD
P603B
JST2.0-10C SMD
1 2 3 4 5 6 7 8 9
10
1112
BUS603
69-010002-0
BUS603
69-010002-0
1 2 3
P606B
13-25009-00
P606B
13-25009-00
1
2
3
4
5
6
7
8
9
P608B
13-25009-00
P608B
13-25009-00
1
2
3
4
5
6
7
8
9
P621B
2PIN2.54-C
P621B
2PIN2.54-C
1 2
P619B
13-25008-00
P619B
13-25008-00
1
2
3
4
5
6
7
8
P623B
2PIN2.54-C
P623B
2PIN2.54-C
1 2
P615B
13-25009-00
P615B
13-25009-00
1
2
3
4
5
6
7
8
9
P611B
13-25009-00
P611B
13-25009-00
1
2
3
4
5
6
7
8
9
P616B
13-25009-00
P616B
13-25009-00
1
2
3
4
5
6
7
8
9
BUS605
69-010002-0
BUS605
69-010002-0
1 2 3
P618A
12PIN2.0-A710B
P618A
12PIN2.0-A710B
2
3
4
1
5
6
7
8
9
10
11
12
SCHEMATICS DIAGRAM
- 14 -

S801
SDDLB1027U-RN
S801
SDDLB1027U-RN
1 2 P801A
2P2.54-A100B
P801A
2P2.54-A100B
1
1
2
2
SCHEMATICS DIAGRAM
- 15 -

120deg Thermal Autoreset switch
RED UL1015 14AWG 300mm
BLK UL1015 14AWG 300mm
GRY UL1015 14AWG 300mm
0V
42.9V No load 41.1V/17.4A(Voltage between Pin8 to Pin9)
57.4V No load 55.2V/13.5A(Voltage between Pin7 to Pin9)
42.9V No load 41.1V/17.4A(Voltage between Pin9 to Pin10)
57.4V No load 55.2V/13.5A(Voltage between Pin9 to Pin11)
BLK UL1672 16AWG 150mm
BWN UL1672 16AWG 150mm
0V
18.9V No load 18.3V/0.6A(Voltage between Pin14 to Pin15)
66.9V No load 65V/0.2A(Voltage between Pin13 to Pin15)
18.9V No load 18.3V/0.6A(Voltage between Pin15 to Pin16)
66.9V No load 65V/0.2A(Voltage between Pin15 to Pin17)
WHI UL1015 22AWG 150mm
WHI UL1672 16AWG 150mm
BLU UL1672 16AWG 150mm
WHI UL1015 22AWG 150mm
ORA UL1015 14AWG 300mm
WHI UL1015 14AWG 300mm
GRN UL1015 22AWG 300mm
VIO UL1015 22AWG 300mm
BLK UL1015 22AWG 300mm
GRY UL1015 22AWG 300mm
YEL UL1015 22AWG 300mm
Thermal protector leads are
terminated with Molex 50539-8000
and with Molex housing 51144-0200
Primary leads are terminated with
Molex 43375-0001 and with Molex
housing 44441-2004
Secondary leads are terminated
with Molex 50539-8000 and with
Molex housing 51144-0500
Secondary high and low Alternative loads
Secondary current at normal load
Thermal protector mounted on secondary
side but leads close to primary leads
Diameter <162mm Center filled and 10mm hole
Height <106mm
Weight <10.8Kg
Label: ┌ ┐
Toroid Audio Ltd
P/N: TI-043810 AU Iss 2
NAD: M25
Thermal Autoreset 120Deg
Class B insulation system (E202144/Z125)
cULus logo + E115159 CE Logo
└┘
Comments:
1)Primary resistance:2x0.36ohm
2)Secondary resistance:2x(0.065+0.03) and 2x(1.1+0.44)ohm
3)Calculated temperature rise at 1350VA
continuous load:77 deg C
4)CUL recognized to UL6500 and Can/CSA E60065-00
Secondary leads are terminated with
Molex 43375-0001 and with Molex
housing 44441-2005
44441-2004 44441-2005 43375-0001 50539-8000 51144 series
117V between Pin1 to Pin2
117V between Pin3 to Pin4
P2A
MOLEX_51144-0200
P2A
MOLEX_51144-0200
1
2
P1A
MOLEX_44441-2004
P1A
MOLEX_44441-2004
1
2
3
4
P4A
MOLEX_51144-0500
P4A
MOLEX_51144-0500
1
2
3
4
5
P3A
MOLEX 44441-2005
P3A
MOLEX 44441-2005
1
2
3
4
5
t
TR1
M25 MAIN TRANSFORMER
t
TR1
M25 MAIN TRANSFORMER
1
2
14
3
4
5
6
7
8
9
10
11
13
15
16
17
SCHEMATICS DIAGRAM
- 16 -

J103
J104
J101
RV101
C1G1
RL101
G1G2
CONTINUED PROTECTION AGAINST RISK OF FIRE REPLACE ONLY WITH SAME TYPE
IDLING CURRENT
R141
R139
Q120
D10 5
C159
R142
R143
R1P2
R1N6
SOLDER
M25 POWERAMP MODULE VM1.0
2005/08/08
Q148
R1N2
R198
FUSE AND RATING!
D106
C132 R1A6
R130
R132
Q114
Q115
R176
D10 9
C117
R152 R124
D10 7
ISC
RV104
R123
C113
R122
C112
R135
R131 D110
Q117
R136
D112
D111
CNI1
R133Q1 16
C156
C137
D114
R151
C138
R134
RNI1
R150
Q127
R154
C140
Q138
R171
R175
D11 3
R170
Q139
D119
Q137
R1N1
C139
R169
D136
Q146
C121R149
C136
Q121 CNI5
R140
Q125
RNI5
CNI 2 R155
Q124
D115 D116
C118
R126
R125
R148
Q122
C119
C120
R147CNI4
D102
D103
RNI3
R144
R153
R145
D117
RNI4
C135 R146
Q123
CNI3
+
C134
R121
R174
Q109
C108
Q108
Q102
Q140
C110
THERM AL
TP1
RV103
THERMAL
TP2 OFFSETGND ISC
C116
R117
P103A
Q11 2
C114
Q110
C115
R116
Q111
R118
R119C153
C111
C109
R104
Q101
C106
R109
Q10 0
C101
Q106
R108
Q10 4
R107
R197
Q10 5
R110
C107
R111
C102
D101
R114
D100
R100
R102
C100
Q142
R112
R105
C103
R103
C143
R179
R101
R1A5
R172
C150
C16 0
R173
R1A3
C152
D137
R168
D140
R1A4
R1A2
D134
D133
IC104
R1P3
C151
C148
Q113
R120
Q107
R113
R106
Q103
D130
R115
C105
D132
D131
R199
D129
C149
R1A0
R1A1
C10 4
R181
R182
C144
R180
R1N8
Q134
Q145
R164
R1E3
R1E2
CB101
R177
C141
L101
R196 D120
R178
C142
Q131
CNI 8
Q130
R163
CNI7
R157
Q129
CNI9
R156
Q126
CNI6
C162
Q12 8
R159
R162
Q132
R1N7 R158
M25 AMPLIFIER MODULE
W101
G1G1
R1N3
C127
C154
C122
UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE!
C147 R194 R1A9 R189
CAUTION:
R1H1
R1H2
ATTENTION:
C155
R1E1
D126 D127 C12 8 C124
RV102
D10 8
R193
D121
R192
D128 C146
D125
D135
R190
IC1 03
D124
R183
R195
R188
C161
C130
R128
C131R185
R127 C133
Q119 R137
R138
Q118
D104
R186 R129
R1P4
D139
R187
R184
RNI2
Q147
D13 8
P101A
SC NPN
SC PNP
+18V
-18V
Q14 1
R1H3
+68V
R1E0
-68V
Q144
THERMAL
PROTECT
ACOFF
R1A7
F101
C145
R1A8
Q143
D122
D123
R191
IC102
Q13 5
IC101
P102A
BUS101
C158
C126 C129
F102
C157
C12 5
C123
R1P1
R165
Q149
R1N5
R161
F101&F102=T6.3AL/250V
R1N4
R160
Q133
R1G1
PCB LAYOUT
AMP BOARD - COMPONENT SIDE
AMP BOARD - SOLDER SIDE
-17-

P202A
P201A
DESIGNED BY:HANSONG M25 TEAM 2005/08/08
VM 1.0
F201&F202 ARE T1.6AL/250V
F203&F204 ARE T1.6AL/250V
C21 0
F20 3
BR202
b
HS21 4 HS20 5
ebe
NAD M25 THX SEVEN CHANNEL AMPLIFIER
Q208
Q207
R296
C274
R2A 2
R2A 3
D215
HS206
D224
R2F3
G2G1 ACIN
ISEN DGND
6
ACOUT
P20 7A
+5VD RELAY
BR208
~
1-
~
+
C255
C227 C228
C26 5
R21 5
IC206
C26 6
R2E9
R21 3
R21 4
C26 2
R216 C230
b
D201
e
Q234 R2 12
Q205
R251
R25 2 C258
Q228
R253
b
C26 3 R2F5
Q227
b
R2F4
D23 0
R2F6
e R25 4 e
R2F2
D23 1 D223
R2F1
IC205
C219
C22 0C21 6 R208 R206 R204 R202
b
Q204 C21 8
C217C21 5
HS20 4
R207 R205
e
Q202
R203 R201
e
b
Q203
Q209
D233 C276 R2 H4
D235
R219
R2H2
C231 R220 C236
C27 7
D234
C238
R2H3
D236
C239 C237 C232
C23 4 R225
R25 0 C233
R22 3
R22 4
R222
D20 3
R21 8 Q240R221
R217 C229
D20 2 D232
D205
R227
C226
D204
b
C235 R226
e
Q241
b
R211
Q206
Q235
e
UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE
REPLACE ONLY WITH SAME TYPE FUSE AND RATING
FOR CONTINUED PROTECTI ON AGAINST RISK OF FIRE
ATTENTION:
The two l inks shoul d be sho rted
BUS202
and should be resumed after
during the test for8ohms load
C261 R275
C206
HS213
Q220
C207
IC202
IC201
Q219
HS21 2
D208
R27 8
C269
R267
R2A 9
R279
W201
D21 1
R28 3
W202
HS20 2
D209
C270
BUS205
C20 9
C208
CAUTION:
C275
D214 D213
D222
HS20 1
HS20 3 Q20 1
BUS204
BUS206
BUS201
C20 5
C20 4
-
~
+
~
BR201 C2 01
C20 3
C20 2
ACOFF
P203A
J202 J203
the te st.
AGND1 FAN1 FAN2 FAN3 -70 V +70V +18V -18 V DGND
R2H1
R259
R299
SEN1 SEN2 SEN7 SEN6 SEN3 SEN4 NC SEN5
P205B
ISCTRIG_1 ISCTRIG_2 ISCTRIG_3 ISCTRIG_6 ISCTRIG_4 ISCTRIG_5
DGND
ISCTRIG_7
Q222
be
R260 Q232
R28 1
b
R258
e
be
Q221 R210
b
R280
e
Q231 R20 9
R29 7
be
Q225 R2 98 Q226
be
b
R294
e
b
R29 5
Q223
e
Q224
FOR CONTINUED PROTECTION AGAINST RISK OF FIRE REPLACE ONLY WITH SAME TYPE FUSE AND RATING UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE
D207
PROT5
ATTENTION: CAUTION:
R27 0
R26 1
D228
C256
C268
R2A 4
D229
IC203
DGND
DGND
HS21 1
P20 6B
PROT6
PROT7
PROT5
STBYLED
+5VD
R28 2
R276
R26 3
C257
Q218
R277
D21 0
D220 C273 R2 73
C271
C259
R264
R2E6 R2 A7 R2 A1
D225 D221
R266
R2E1
R27 4
R26 5 R2A 5
R27 1
R2A 8
C26 0
C272
R2E8
D216
R2E3 R2 E4
R2E7
Q233
D21 7 D218
D226
R2E5
TL084
C26 4 R2A 6 R268
D219
R287
R2E2
R28 8 R269 R2 72 R28 9
74HC21
R290
IC204
R28 5 R293
PROT4
PROT4
PROT3
PROT3
PROT2
SCLED
R26 2
D227
PROT1
+12VD
SCLED STBY +8V STBY +8V PROT4 PROT3 PROT5 PROT2 PROT1 PROT6 PROT7
P204B
DGND DGND SCLED DGND
C267 R2 91
D212
RV201
R29 2 R284
DGND
TP1
R28 6
J201
C290
C254
C21 4 C225
C22 3
C248
W204
C22 2
R240
C24 0
HS207
R238
Q212
R233
R235
C21 1 C212
C213 C224
Q210
W203
be
be
C247
R23 2 Q211
b
R234
e
Q213
R239 b
C245 e
C243
Q236
R236
R237
C244
BR205
C246
Q237
+
~
-
~
+
~
-
~
BR203
C22 1
b
BR206
Q214
R242 b
Q216
R247 b
e
C253
R241
R243
eQ217
R245
Q215
be
e
C25 2
R249
C25 0
Q239
BR207
R24 4
R24 8
BR204
C249
C251
R246
Q238
P20 8B
HS209 HS210
C24 2
R25 7
BUS203
F204
P209B
2005/08/08
F201 F2 02
R25 5
R22 8
R229
HS208
b
R230
Q230
e
R256
R23 1
be
Q229
D206
C24 1
PCB LAYOUT
PSU BOARD - COMPONENT SIDE
PSU BOARD - SOLDER SIDE
-18-

P621B
P604B 1
91
1
1
P606B
9
1
P605B
9
1
P612B
9
P613B
9
1
P611B
9
19 P607B
1
1
19P608B
P622
1
9
P615B
22
P614B
9
P623
1 1
P610B
91 9P609B
1
2
P616B9
P617B
9
1
VM1.0 2005/08/08
DGND
FAN2
8
P619B
1
P620B
8
BUS606
BUS605
BUS604
1
FAN3 -68V +68V ACOFF
P603B
+18V -18V DGND
1
10
AGND FAN1
BUS603
M25 CONNECTION BOARD
BUS602
BUS601
PROT2
P601B
PROT6 PROT1 PROT7 DGND DGND
1
SCLED AGND SCLED
SEN1 SEN6 SEN7 SEN3 SEN2
16
SEN5 SEN4 AGND ISCTRIG_1 ISCTRIG_2 ISCTRIG_3 ISCTRIG_4 ISCTRIG_5
1
ISCTRIG_6 ISCTRIG_7
P602B
STBY STBY
16
+8V +8V PROT4 PROT3 PROT5
STBY
P618B
SCP_3
SCN_4
DGND
+8V
SCN_3
SCLED
-62V_4
+62V_4
12
-62V_3
SCP_4
+62V_3
1
PCB LAYOUT
CONNECTION BOARD - COMPONENT SIDE
CONNECTION BOARD - COMPONENT SIDE
- 19 -

POWER
R345
D308 D310
Q332 R348 R347 Q330
R343
P301A
P301A
Q331R346 Q329R344
D307
Q310
R331
Q326
Q319
R340
Q313
D305
CH 6
Q327
R334 R341
R306 R320 Q320
Q314
D306
CH 7
R335
Q328
R342
R307 R321 Q321
CH 3
Q324 Q311
R338 R332
D303
CH 4
Q317 R304 R318
Q325
R339
Q312
D304
CH 5
R333
Q318 R305 R319
R350
D309
R315
Q308
R329
CH 1
Q322
R336
Q315 R302 R316
Q309
D301
CH 2
R330
Q323
R337
D302
Q316 R303 R317
VM1.0 2005/08/08
M25 LED BOARD
1
SOFT CLIPPING
Q334
D312 Q333 R301
R324C301 R349 R308 Q301 R322 R309 Q302R323 R310 Q303 R311 Q304R325 R312 Q305 R326 R313 Q306 R327 R314 Q307R328
PCB LAYOUT
DISPLAY BOARD - COMPONENT SIDE
DISPLAY BOARD - SOLDER SIDE
- 20 -