Yamaha P2500S User manual

POWER AMPLIFIER
Owner’s Manual
E

2
The above warning is located on the top
of the unit
•Explanation of Graphical Symbols
The lightning flash with arrowhead symbol
within an equilateral triangle is intended to
alert the user to the presence of uninsulated
“dangerous voltage” within the product’s
enclosure that may be of sufficient magnitude
to constitute a risk of electric shock to persons.
The exclamation point within an equilateral
triangle is intended to alert the user to the pres-
ence of important operating and maintenance
(servicing) instructions in the literature
accompanying the product.
IMPORTANT SAFETY INSTRUCTIONS
CAUTION: TO REDUCE THE RISK OF
ELECTRIC SHOCK, DO NOT REMOVE
COVER (OR BACK). NO USER-SERVICEABLE
PARTS INSIDE. REFER SERVICING TO
QUALIFIED SERVICE PERSONNEL.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
1 Read these instructions.
2 Keep these instructions.
3 Heed all warnings.
4 Follow all instructions.
5 Do not use this apparatus near water.
6 Clean only with dry cloth.
7 Do not block any ventilation openings. Install in
accordance with the manufacturer’s instruc-
tions.
8 Do not install near any heat sources such as
radiators, heat registers, stoves, or other appa-
ratus (including amplifiers) that produce heat.
9 Do not defeat the safety purpose of the polar-
ized or grounding-type plug. A polarized plug
has two blades with one wider than the other. A
grounding type plug has two blades and a third
grounding prong. The wide blade or the third
prong are provided for your safety. If the pro-
vided plug does not fit into your outlet, consult
an electrician for replacement of the obsolete
outlet.
10 Protect the power cord from being walked on or
pinched particularly at plugs, convenience
receptacles, and the point where they exit from
the apparatus.
11 Only use attachments/accessories specified by
the manufacturer.
12 Use only with the cart, stand,
tripod, bracket, or table spec-
ified by the manufacturer, or
sold with the apparatus.
When a cart is used, use cau-
tion when moving the cart/
apparatus combination to
avoid injury from tip-over.
13 Unplug this apparatus during lightning storms
or when unused for long periods of time.
14 Refer all servicing to qualified service person-
nel. Servicing is required when the apparatus
has been damaged in any way, such as power-
supply cord or plug is damaged, liquid has been
spilled or objects have fallen into the apparatus,
the apparatus has been exposed to rain or mois-
ture, does not operate normally, or has been
dropped.
This mark indicates a dangerous electrically live terminal.
When connecting an external wire to this terminal, it is
necessary either to have “a person who have received
appropriate guidance on handling” make the connection or to
use leads or a cord that have been manufactured in such a way
that the connection can be made simply and without problem.
BRIDGE
11 ++ --
(+)(-)
IMPORTANT NOTICE FOR THE UNITED KINGDOM
Connecting the Plug and Cord
•
WARNING: THIS APPARATUS MUST BE EARTHED
IMPORTANT. The wires in this mains lead are coloured in accordance
with the following code:
As the colours of the wires in the mains lead of this apparatus may not
correspond with the coloured markings identifying the terminals in
your plug proceed as follows:
The wire which is coloured GREEN-and-YELLOW must be connected
to the terminal in the plug which is marked by the letter E or by the
safety earth symbol or colored GREEN or GREEN-and-YELLOW.
The wire which is coloured BLUE must be connected to the terminal
which is marked with the letter N or coloured BLACK.
The wire which is coloured BROWN must be connected to the termi-
nal which is marked with the letter L or coloured RED.
GREEN-AND-YELLOW : EARTH
BLUE : NEUTRAL
BROWN : LIVE
This applies only to products distributed by Yamaha-Kemble Music (U.K.) Ltd. (3 wires)
WARNING
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,
DO NOT EXPOSE THIS APPARATUS TO RAIN OR MOISTURE.

3
Precautions
—For safe operation —
WARNING
●Connect this unit’s power cord only to an AC outlet of the type
stated in this Owner’s Manual or as marked on the unit. Failure
to do so is a fire and electrical shock hazard.
●Do not allow water to enter this unit or allow the unit to become
wet. Fire or electrical shock may result.
●Do not place a container with liquid or small metal objects on
top of this unit. Liquid or metal objects inside this unit are a fire
and electrical shock hazard.
●Do not place heavy objects, including this unit, on top of the
power cord. A damaged power cord is a fire and electrical shock
hazard. In particular, be careful not to place heavy objects on a
power cord covered by a carpet.
●Do not scratch, bend, twist, pull, or heat the power cord. A dam-
aged power cord is a fire and electrical shock hazard.
●Do not remove the unit’s cover. You could receive an electrical
shock. If you think internal inspection, maintenance, or repair is
necessary, contact your dealer.
●Do not modify the unit. Doing so is a fire and electrical shock
hazard.
●If lightning begins to occur, turn off the power switch of the unit
as soon as possible, and unplug the power cable plug from the
electrical outlet.
●If there is a possibility of lightning, do not touch the power cable
plug if it is still connected. Doing so may be an electrical shock
hazard.
●If the power cord is damaged (i.e., cut or a bare wire is exposed),
ask your dealer for a replacement. Using the unit with a damaged
power cord is a fire and electrical shock hazard.
●Should this unit be dropped or the cabinet be damaged, turn the
power switch off, remove the power plug from the AC outlet, and
contact your dealer. If you continue using the unit without heed-
ing this instruction, fire or electrical shock may result.
●If you notice any abnormality, such as smoke, odor, or noise, or
if a foreign object or liquid gets inside the unit, turn it off imme-
diately. Remove the power cord from the AC outlet. Consult your
dealer for repair. Using the unit in this condition is a fire and
electrical shock hazard.
CAUTION
●Keep this unit away from the following locations:
- Locations exposed to oil splashes or steam, such as near cook-
ing stoves, humidifiers, etc.
- Unstable surfaces, such as a wobbly table or slope.
- Locations exposed to excessive heat, such as inside a car with
all the windows closed, or places that receive direct sunlight.
- Locations subject to excessive humidity or dust accumulation.
●Do not place the power cord close to a heater. It may melt, caus-
ing fire or electrical shock.
●Hold the power cord plug when disconnecting it from an AC out-
let. Never pull the cord. A damaged power cord is a potential fire
and electrical shock hazard.
●Do not touch the power plug with wet hands. Doing so is a
potential electrical shock hazard.
●This unit has ventilation holes at the front and rear to prevent the
internal temperature rising too high. Do not block them. Blocked
ventilation holes are a fire hazard.
In particular, do not
- place the unit on its side or upside down,
- place the unit in any poorly-ventilated location such as a
bookcase or closet (other than on the dedicated rack),
- cover the unit with a table cloth or place it on a carpet or bed.
●Allow enough free space around the unit for normal ventilation.
This should be: 5 cm at the sides, 10 cm behind, and 10 cm
above.
If the airflow is not adequate, the unit will heat up inside and
may cause a fire.
●To mount several of these units in a standard EIA rack, refer to
the rack mounting instructions on page 11.
●To relocate the unit, turn the power switch off, remove the power
plug from the AC outlet, and remove all connecting cables. Dam-
aged cables may cause fire or electrical shock.
●Use only speaker cables when connecting speakers to amplifier
outputs. Using other types of cables is a fire hazard.
●Turn off all musical instruments, audio equipment, and speakers
when connecting to this unit. Use the correct connecting cables
and connect as specified.
●Always lower the volume control to minimum before turning on
the power to this unit. A sudden blast of sound may damage your
hearing.
●Do not use this amplifier for any purpose other than driving loud-
speakers.
●If you know you will not use this unit for a long period of time,
such as when going on vacation, remove the power plug from the
AC outlet. Leaving it connected is a potential fire hazard.
Installation
Operation
In case an abnormality occurs during operation
Installation
Operation

4
—For correct operation —
●XLR-type connectors are wired as follows
Pin 1: ground; Pin 2: hot (+); Pin 3: cold (–).
●Use of a mobile phone near this unit may induce noise. If noise
occurs, move the phone further from the unit.
Always turn the power off when the amplifier is not in use.
Illustrations in this manual are for explanatory purposes only, and may not match the actual appearance of the product during operation.
Company names and product names used in this Owner's Manual are trademarks or registered trademarks of their respective owners.
* This applies only to products (P7000S, P5000S) distributed by YAMAHA CORPORATION OF AMERICA.
Connector pin assignments Interference from Cell Phones
1. IMPORTANT NOTICE: DO NOT MODIFY THIS UNIT!
This product, when installed as indicated in the instructions contained in this manual, meets FCC requirements. Modifications not
expressly approved by Yamaha may void your authority, granted by the FCC, to use the product.
2. IMPORTANT: When connecting this product to accessories and/or another product use only high quality shielded cables. Cable/s
supplied with this product MUST be used. Follow all installation instructions. Failure to follow instructions could void your FCC authori-
zation to use this product in the USA.
FCC INFORMATION (U.S.A.)

5
Introduction
Thank you for your purchase of the YAMAHA P7000S, P5000S, P3500S or P2500S power amplifier.
These P-series amplifiers fully incorporate Yamaha’s renown technological expertise, and offer high
reliability, rock-solid stability, and superb acoustic characteristics—all in a trim, 2U-sized package.
Features
• With two types of input jacks (balanced XLR and balanced phone) and three types of output jacks
(Speakon, 5-way binding post, and phone), the P series is suitable for a wide variety of applications
and installed systems.
• The unit offers three operating modes: STEREO (where Channels A and B operate independently),
PARALLEL (where the unit outputs a mono source through twin amplifier systems), and BRIDGE
(where the unit operates as a single high-power amp).
• Each channel is equipped with an independent OFF/LOW CUT/SUBWOOFER switch—where LOW
CUT engages a high-pass filter, and SUBWOOFER engages a low-pass filter. With LOW CUT or
SUBWOOFER selected, you can adjust the cutoff frequency from 25 to 150 Hz.
• Each channel has its own SIGNAL and CLIP indicators.
• The PROTECTION indicator lights up—and sound output is automatically muted—whenever the
unit’s protective circuitry is operating. The TEMP indicator lights up if the unit is running hot.
• Variable-speed low-noise fans ensure high reliability.
This Owner’s Manual covers the four models: P7000S, P5000S, P3500S and P2500S power amplifiers.
Please read through this manual carefully before beginning use, so that you will be able to take full
advantage of the amplifier’s superlative features and enjoy trouble-free operation for years to come.
After reading through the manual, please store it in a safe place.
Contents
Controls and Functions ..................................... 6
Front Panel .......................................................... 6
Rear Panel ........................................................... 7
Speaker Connections ........................................ 9
Speaker impedance ............................................. 9
Wiring ................................................................ 10
Rack Mounting ................................................ 11
Specifications .................................................. 12
General Specifications ....................................... 12
Block Diagram ................................................... 13
Dimensions ........................................................ 14
Performance Graphs ......................................... 14
Troubleshooting ............................................... 15

6
Controls and Functions
■Front Panel
1POWER switch and indicator
Press to toggle the power on or off. The POWER indicator
lights up green when the power is ON.
2TEMP indicator
Lights up red if the heat sink temperature exceeds 85°C
(185°F).
3PROTECTION indicator
Lights up red to indicate that protection is in effect. Specifi-
cally, lights up if the heat sink overheats, or if a DC voltage is
detected at the amplifier outputs. Also lights up for about three
seconds at time of power-on, as the amp gets ready to operate.
To provide protection, the unit will not output any sound from
the speakers while this indicator is lit up. When start-up is
completed or the problem is corrected, the indicator goes off
and normal operation resumes.
4CLIP indicator
Lights up red when the output signal distortion on the corre-
sponding channel rises above 1%—indicating that “clipping”
has occurred because the signal level is too high.
5SIGNAL indicator
Lights up green when the corresponding channel’s output level
exceeds 2 Vrms (equivalent to 1/2 W into an 8 Ωload, or 1 W
into a 4 Ωload).
6Volume control knobs
Each control knob adjusts the volume of the corresponding
channel, in 31 steps from –∞dB to 0 dB.
NOTE:
If you wish to lock in the knob settings, you can fasten the sup-
plied security cover over the knobs so that the settings will not
be disturbed.
How to install the security cover
(1) Use the supplied hex wrench to remove the four attach-
ment screws from the amplifier.
(2) Adjust the security cover to the position of screw holes.
Fasten it into place using the same screws.
7indicator
Lights up yellow if the YS PROCESSING switch on the rear panel
is set ON. (See page 7.)
8Air intakes
The amplifier uses forced-air cooling. The cooling fans draw
air in from the front and exhaust it through the rear. Please be
sure that you do not block the air intakes or exhaust vents.
NOTE:
The fans do not come on at initial power-on, but will switch on
automatically when the temperature of the heat sink rises above
50°C (122°F). The fan speed will then vary automatically as
the temperature changes.
2 4
7361 58 8

7
■Rear Panel
1FILTER switch and FREQUENCY adjustment knob
(One pair for each channel)
Use these controls to select the filter type and adjust the cutoff
frequency on each channel (A and B). You use the FILTER
switch to select the filter, as follows.
OFF ...................... Do not use any filter.
SUBWOOFER..... Use a low-pass filter. The amplifier outputs
the frequencies that are lower than the cut-
off set by the FREQUENCY adjustment
knob.
LOW CUT ........... Use a high-pass filter. You can use this set-
ting to filter out unneeded low or subsonic
frequencies.
If you select SUBWOOFER or LOW CUT, you can then use
the FREQUENCY adjustment knob to adjust the cutoff fre-
quency. The adjustment range is 25 Hz to 150 Hz.
NOTE:
If the amplifer is set to BRIDGE mode, only the switch and
knob for Channel A are effective. (The Channel B frequency
controls are disabled.)
2ON/OFF switch
If you set this switch ON, the amplifier adds low-frequency
compensation so as to enhance speaker output. The results (the
actual change in the low-frequency balance) will vary accord-
ing to the speaker type. Note that this switch is effective only if
the FILTER switch is set to OFF.
NOTE:
This feature provides improved frequency reponse on speakers
such as the YAMAHA S112 and S115.
3INPUT jacks (Channels A, B)
Two jack types are provided for each channel. Note that if you
are using BRIDGE or PARALLEL mode, only the Channel A
jacks are effective.
• XLR-3-31 jack
The XLR-3-31 input jacks are wired as shown below.
• Phone jack
Phone jacks are wired as follows.
SUB
WOOFER
LOWCUT
ON
STEREO BRIDGE PARALLEL
INPUT
SPEAKERS
BRIDGE
OFF
OFF
1
1
+
-
+
-
+
-
+
-
2
2
1
1
+
-
+
-
SUB
WOOFER LOWCUT
OFF
FREQUENCY
Hz
25 150
90
50
125
FREQUENCY
11
2332
L
O
C
K
L
O
C
K
++ --
(+)(-)
Hz
25 150
90
50
125
1 5
4 6
2
3
SUB
WOOFER LOWCUT
OFF
25 Hz-150 Hz
Cutoff frequency
25 Hz to 150 Hz
1
2
3
hot ground
cold
ring (cold)
tip (hot)sleeve
(ground)

8
4STEREO/PARALLEL/BRIDGE switch
Use this switch to select the operating mode.
• STEREO mode
Channels A and B operate independently (as with a conven-
tional stereo amplifier). The Channel A input goes to the Chan-
nel A output jacks, and the Channel B input goes to the
Channel B output jacks.
•PARALLEL mode
The Channel A input signal is output through both the Channel
A and Channel B output jacks. The Channel B input jacks do
not function. Channel A and B volumes can be independently
adjusted.
• BRIDGE mode
The Channel A input signal is output from the BRIDGE output
jacks. To adjust the volume, you must use the Channel A vol-
ume control knob.
5SPEAKER jacks
Neutrik NL4FC Speakon output connectors,
5-way binding post output jacks,
Phone output jacks
For minimum speaker impedenance values, see page 9.
6GND terminal
This is a screw-type ground terminal. If you are having a prob-
lem with hum or noise, use this terminal to connect to ground
or to connect to the chassis of the mixer, preamp, or other
device in your system.

9
Speaker Connections
■Speaker impedance
Speakers can be connected to the amplifier as shown below. Note that speaker impedance will vary according to the connection method and
the number of speakers. Please be sure that your speakers’impedance is not less than the relevant minimum value indicated below.
Connection configurations for STEREO
and PARALLEL modes
When using 5-way binding post output jacks
When using Speakon connector
When using phone jack
Connection configurations for BRIDGE
mode
When using 5-way binding post output jacks
When using Speakon connector
BRIDGE
11 ++ --
(+)(-)
STEREO BRIDGE PARALLEL
STEREO BRIDGE PARALLEL
or
Minimum
speaker
impedance:
4 Ω
Minimum
speaker
impedance:
4 Ω
SPEAKERS
1
1
+
-
+
-
+
-
+
-
2
2
1
1
+
-
+
-
2332
L
O
C
K
L
O
C
K
Minimum
speaker
impedance:
4 Ω
SPEAKERS
1
1
+
-
+
-
+
-
+
-
2
2
1
1
+
-
+
-
2332
L
O
C
K
L
O
C
K
Minimum
speaker
impedance:
4 Ω
BRIDGE
11 ++ --
(+)(-)
STEREO BRIDGE PARALLEL
Minimum
speaker
impedance:
8 Ω
SPEAKERS
1
1
+
-
+
-
+
-
+
-
2
2
1
1
+
-
+
-
2332
L
O
C
K
L
O
C
K
Minimum
speaker
impedance:
8 Ω

10
■Wiring
5-way binding post
(1) Turn off the POWER switch.
(2) Remove the cover attachment screws and remove the pro-
tective cover from the speaker terminals.
(3) Remove about 15 mm of insulation from the end of each
speaker cable, and pass the bare wire through the holes in
the appropriate speaker terminals. Tighten the terminals to
securely clamp the wires. Refer to page 9 for speaker
polarities.
Note to users in the USA:
Please use Class 3 wiring. (P7000S, P5000S)
Please use Class 2 wiring. (P3500S, P2500S)
Be sure that the bare wire ends do not jut out from the ter-
minals and touch the chassis. The following shows how
the cable should look when correctly attached.
(4) Reattach the protective cover over the speaker terminals.
Speakon connector
(1) Turn off the POWER switch.
(2) Insert the Neutrik NL4FC plugs into the Speakon connec-
tor on the rear of the amplifier, and turn clockwise to lock.
Neutrik NL4FC plugs
Phone jack
(1) Turn off the POWER switch.
(2) Insert the phone plug into the jack on the rear of the ampli-
fier.
Screw
15mm
* Actual size
*
Speaker cable
Chassis
Bare wire
CHANNEL
STEREO or PARALLEL BRIDGE
1+ A+ 1+ +
1–A–1–
2+ B+ 2+ –
2–B–2–
Neutrik NL4FC plugs
CHANNEL
1+ B+
1–B–
A
B

11
Rack Mounting
Mounting in a standard EIA rack
If you are mounting multiple power amplifiers in a rack, be sure to install ventilation panel(s) as shown below. Also be sure to use metal brack-
ets (one on each side) to support the rear of each amplifer.
Note: EIA stands for Electronic Industries Alliance.
Ventilation panel(s)
Use 1U-size blank panel(s).
If mounting up to four amplifiers in
an open-backed rack
Install a ventilation panel as shown below.
When mounting five or more amplifi-
ers in an open-backed rack, and
when mounting any number of
amplifiers in a close-backed rack
Install ventilation panels above and below each amplifier, as shown
below.
480
44
Unit: mm
Ventilation panel
(Attach to the front
or rear of the rack.)

12
Specifications
■General Specifications
0 dBu=0.775 Vrms, Half Power=1/2 Power Output Level (Rated Power)
Specifications and descriptions in this owner’s manual are for information purposes only. Yamaha Corp. reserves the right to change or modify products or spec-
ifications at any time without prior notice. Since specifications, equipment or options may not be the same in every locale, please check with your Yamaha
dealer.
European models
Purchaser/User Information specified in EN55103-1 and EN55103-2.
Inrush Current: 32A (P7000S, P5000S)/65A (P3500S)/55A (P2500S)
Conforms to Environments: E1, E2, E3 and E4
P7000S P5000S P3500S P2500S
Power Output Level (Rated Power) 8 Ω/STEREO 750 W × 2 525 W × 2 390 W × 2 275 W ×2
1 kHz 4 Ω/STEREO 1100 W ×2 750 W × 2 590 W ×2 390 W ×2
THD + N = 1% 8 Ω/BRIDGE 2200 W ×1 1500 W ×1 1180 W ×1 780 W ×1
8 Ω/STEREO 700 W × 2
650 W × 2 (European Model)
500 W × 2 350 W ×2 250 W ×2
20 Hz – 20 kHz 4 Ω/STEREO 950 W × 2 700 W × 2 450 W ×2 310 W ×2
THD + N = 0.1% 8 Ω/BRIDGE 1900 W ×1 1400 W ×1 900 W ×1 620 W ×1
1 kHz 2 Ω/STEREO 1600 W ×2 1300 W ×2 1000 W ×2 650 W ×2
20 ms non-clip 4 Ω/BRIDGE 3200 W ×1 2600 W ×1 2000 W ×1 1300 W ×1
Power Bandwidth Half Power 10 Hz – 40 kHz (THD + N = 0.5 %)
Total Harmonic Distortion (THD + N) 4 Ω– 8 Ω/STEREO
0.1 %
20 Hz – 20 kHz, Half Power 8 Ω/BRIDGE
Frequency Response RL = 8 Ω, Po = 1 W 0 dB, +0.5 dB, –1 dB f = 20 Hz – 50 kHz
Intermodulation distortion (IMD) 4 Ω– 8 Ω/STEREO
0.1 %
60 Hz:7 kHz, 4:1, Half Power 8 Ω/BRIDGE
Channel Separation Half Power RL = 8 Ω1 kHz 70 dB
Vol. max input 600 Ωshunt
Residual Noise Vol. min. 20 Hz – 20 kHz (DIN AUDIO) –70 dBu
SN Ratio 20 Hz – 20 kHz (DIN AUDIO) 104 dB 103 dB 102 dB 100 dB
Damping Factor RL = 8 Ω, 1 kHz 350 200
Sensitivity (Vol. max.) Rated Power 8 Ω+8 dBu +6 dBu +4 dBu +3 dBu
Voltage Gain (Vol. max.) 32.1 dB
Input Impedance 30 kΩ/balanced, 15 kΩ/unbalanced
Controls Front Panel POWER switch (Push on/Push off)
Two 31-step Volume control knobs (one per ch)
Rear Panel MODE switch (STEREO/PARALLEL/BRIDGE)
Two FILTER switches (SUBWOOFER/LOW CUT/OFF)
Two fc knobs (25 to 150 Hz, 12 dB/octave)
YS Processing switch (ON/OFF)
Connectors INPUT XLR-3-31 jacks (one per ch)
1/4-inch TRS phone jacks (one per ch)
OUTPUT Speakon jacks (one per ch)
5-way binding posts
1/4-inch phone jacks (one per ch)
Indicators POWER ×1 (Green)
PROTECTION ×1 (Red)
TEMP ×1 (Red) (heatsink temp 85°C)
CLIP ×2 (Red)
SIGNAL ×2 (Green)
YS Processing ×1 (Yellow)
Load protection POWER switch ON/OFF muting
DC-fault power supply
shutdown
DC detection
Amp. protection
Temp. detection (heat sink temp 90°C), VI limiter (RL 1 Ω)
Limiter Comp: THD 0.5 %
Cooling Dual variable-speed fan Single variable-speed fan
Power Requirements United States & Canada 120 V, 60 Hz
Europe 230 V, 50 Hz
Australia 240 V, 50 Hz
Power Consumption Idling 35 W 35 W 30 W 25 W
Output power, 4 Ω650 W 500 W 450 W 320 W
Dimensions (W ×H ×D) 480 ×88 ×456 mm
Weight 12 kg 12 kg 15 kg 14 kg
Included Accessories Security cover (with a hex wrench), Owner’s Manual
≤
≤
≥
≤
≥ ≥
≥
≥ ≤
≥

13
■Block Diagram
P7000S, P5000S
P3500S, P2500S
CHANNEL A
[BRIDGE]
[PARALLEL]
INPUT
CHANNEL B
BA State variable
Active filter
ON
OFF
YAMAHA
SPEAKER
PROCESSING
State variable
Active filter
BA
HPF
LPF CHANNEL A
ATT
OFF
Limiter
Limiter
INV Temperature
Sensor
(Heat Sink) Protection
Circuit
CLIP
CLIP
Ach Power Amp
Bch Power Amp
SIGNAL
PROTECTION
TEMP
SPEAKERS
CHANNEL A
3
3
1
1
2
2
1+
1+
1-
1-
2-
2-
2+
2+
A+B BRIDGE
CHANNEL B
SIGNAL
YAMAHA
SPEAKER
PROCESSING
CHANNEL B
ATT PARALLEL
BRIDGE
STEREO
HPF
Frequency
[25 Hz-150 Hz]
POWER
FAN
+B
E
-B
+24
-24
E
POWER CIRCUIT
Frequency
[25 Hz-150 Hz]
OFF
LPF
POWER SW

14
■Dimensions
■Performance Graphs
P7000S
P3500S
P5000S
P2500S
Unit: mm
Mode:STEREO
Both ch Driven
RL=4 Ω, f=1 kHz
Power Consumption [W]
Output Power [W]
1
10
100
10000
1000
1 10 100 1000 10000
Mode:STEREO
Both ch Driven
RL=4 Ω, f=1 kHz
Power Consumption [W]
Output Power [W]
1
10
100
10000
1000
1 10 100 1000
Mode:STEREO
Both ch Driven
RL=4 Ω, f=1 kHz
Power Consumption [W]
Output Power [W]
1
10
100
10000
1000
1 10 100 1000
Mode:STEREO
Both ch Driven
RL=4 Ω, f=1 kHz
Power Consumption [W]
Output Power [W]
1
10
100
10000
1000
1 10 100 1000

15
Troubleshooting
The following table lists the main causes of abnormal operation and the corrective measures required, as well as the protective circuit opera-
tion in each case.
P3500S, P2500S
P7000S, P5000S
Indicator(s) Possible Cause Remedy Protection Circuit
CLIP indicator lights.
There is a short at a speaker
terminal, amplifier terminal, or
wire.
Locate and correct the cause of
the short.
The PC limiter circuit operates
to protect the power
transistors.
The amplifier load is excessive.
Use a speaker system with an
impedance of at least 4 Ω
(STEREO/PARALLEL mode) or
8 Ω(BRIDGE mode).
TEMP indicator lights. The heat sink temperature has
exceeded 85˚C (185˚F).
Check the ventilation slots, and
provide better airflow around
the amplifier.
The TEMP indicator lights up
to indicate temperature
warning.
PROTECTION indicator lights. The heat sink temperature has
exceeded 95˚C (203˚F).
Check the amplifier ventilation
conditions and take appropriate
measures to improve the
airflow around the amplifier.
The thermal protection circuit
operates to protect the power
transistors.
Indicator(s) Possible Cause Remedy Protection Circuit
PROTECTION indicator lights.
A DC voltage of ±2 V or greater
was generated in the power
amplifier’s output circuit.
Consult your dealer or the
nearest Yamaha service center.
The relay operates to protect
the speaker system.
Indicator(s) Possible Cause Remedy Protection Circuit
Power has been shut down. (All indicators
are off.)
A DC voltage of ± 2 V or greater
was generated in the power
amplifier’s output circuit.
Consult your dealer or the
nearest Yamaha service center.
The protection circuitry shut off
the power to protect the
speaker system.

For details of products, please contact your nearest Yamaha
representative or the authorized distributor listed below.
Pour plus de détails sur les produits, veuillez-vous adresser à Yamaha ou
au distributeur le plus proche de vous figurant dans la liste suivante.
Die Einzelheiten zu Produkten sind bei Ihrer unten aufgeführten
Niederlassung und bei Yamaha Vertragshändlern in den jeweiligen
Bestimmungsländern erhältlich.
Para detalles sobre productos, contacte su tiendaYamaha más cercana
o el distribuidor autorizado que se lista debajo.
CANADA
Yamaha Canada Music Ltd.
135 Milner Avenue, Scarborough, Ontario,
M1S 3R1, Canada
Tel: [phone]
U.S.A.
Yamaha Corporation of America
6600 Orangethorpe Ave., Buena Park, Calif. 90620,
U.S.A.
Tel: [phone]
MEXICO
Yamaha de México S.A. de C.V.
Calz. Javier Rojo Gómez #1149,
Col. Guadalupe del Moral
C.P. 09300, México, D.F., México
Tel: [phone]
BRAZIL
Yamaha Musical do Brasil Ltda.
Av. Reboucas 2636-Pinheiros CEP: 05402-400
Sao Paulo-SP. Brasil
Tel: [phone]
ARGENTINA
Yamaha Music Latin America, S.A.
Sucursal de Argentina
Viamonte 1145 Piso2-B 1053,
Buenos Aires, Argentina
Tel: [phone]
PANAMA AND OTHER LATIN
AMERICAN COUNTRIES/
CARIBBEAN COUNTRIES
Yamaha Music Latin America, S.A.
Torre Banco General, Piso 7, Urbanización Marbella,
Calle 47 y Aquilino de la Guardia,
Ciudad de Panamá, Panamá
Tel: [phone]
THE UNITED KINGDOM
Yamaha-Kemble Music (U.K.) Ltd.
Sherbourne Drive, Tilbrook, Milton Keynes,
MK7 8BL, England
Tel: [phone]
GERMANY
Yamaha Music Central Europe GmbH
Siemensstraße 22-34, 25462 Rellingen, Germany
Tel: [phone]
SWITZERLAND/LIECHTENSTEIN
Yamaha Music Central Europe GmbH,
Branch Switzerland
Seefeldstrasse 94, 8008 Zürich, Switzerland
Tel: [phone]
AUSTRIA
Yamaha Music Central Europe GmbH,
Branch Austria
Schleiergasse 20, A-1100 Wien, Austria
Tel: [phone]
THE NETHERLANDS
Yamaha Music Central Europe,
Branch Nederland
Clarissenhof 5-b, 4133 AB Vianen, The Netherlands
Tel: [phone]
BELGIUM/LUXEMBOURG
Yamaha Music Central Europe GmbH,
Branch Belgium
Rue de Geneve (Genevastraat) 10, 1140 - Brussels,
Belgium
Tel: [phone]
FRANCE
Yamaha Musique France
BP 70-77312 Marne-la-Vallée Cedex 2, France
Tel: [phone]
ITALY
Yamaha Musica Italia S.P.A.
Combo Division
Viale Italia 88, 20020 Lainate (Milano), Italy
Tel: [phone]
SPAIN/PORTUGAL
Yamaha-Hazen Música, S.A.
Ctra. de la Coruna km. 17, 200, 28230
Las Rozas (Madrid), Spain
Tel: [phone]
SWEDEN
Yamaha Scandinavia AB
J. A. Wettergrens Gata 1
Box 30053
S-400 43 Göteborg, Sweden
Tel: [phone]
DENMARK
YS Copenhagen Liaison Office
Generatorvej 6A
DK-2730 Herlev, Denmark
Tel: [phone]
NORWAY
Norsk filial av Yamaha Scandinavia AB
Grini Næringspark 1
N-1345 Østerås, Norway
Tel: [phone]
OTHER EUROPEAN COUNTRIES
Yamaha Music Central Europe GmbH
Siemensstraße 22-34, 25462 Rellingen, Germany
Tel: [phone]
Yamaha Corporation,
Asia-Pacific Music Marketing Group
Nakazawa-cho 10-1, Hamamatsu, Japan 430-8650
Tel: [phone]
TURKEY/CYPRUS
Yamaha Music Central Europe GmbH
Siemensstraße 22-34, 25462 Rellingen, Germany
Tel: [phone]
OTHER COUNTRIES
Yamaha Music Gulf FZE
LB21-128 Jebel Ali Freezone
P.O.Box 17328, Dubai, U.A.E.
Tel: [phone]
THE PEOPLE’S REPUBLIC OF CHINA
Yamaha Music & Electronics (China) Co.,Ltd.
25/F., United Plaza, 1468 Nanjing Road (West),
Jingan, Shanghai, China
Tel: [phone]
INDONESIA
PT. Yamaha Music Indonesia (Distributor)
PT. Nusantik
Gedung Yamaha Music Center, Jalan Jend. Gatot
Subroto Kav. 4, Jakarta 12930, Indonesia
Tel: [phone]
KOREA
Yamaha Music Korea Ltd.
Tong-Yang Securities Bldg. 16F 23-8 Yoido-dong,
Youngdungpo-ku, Seoul, Korea
Tel: [phone]
MALAYSIA
Yamaha Music Malaysia, Sdn., Bhd.
Lot 8, Jalan Perbandaran, 47301 Kelana Jaya,
Petaling Jaya, Selangor, Malaysia
Tel: [phone]
SINGAPORE
Yamaha Music Asia Pte., Ltd.
#03-11 A-Z Building
140 Paya Lebor Road, Singapore 409015
Tel: [phone]
TAIWAN
Yamaha KHS Music Co., Ltd.
3F, #6, Sec.2, Nan Jing E. Rd. Taipei.
Taiwan 104, R.O.C.
Tel: [phone]
THAILAND
Siam Music Yamaha Co., Ltd.
891/1 Siam Motors Building, 15-16 floor
Rama 1 road, Wangmai, Pathumwan
Bangkok 10330, Thailand
Tel: [phone]
OTHER ASIAN COUNTRIES
Yamaha Corporation,
Asia-Pacific Music Marketing Group
Nakazawa-cho 10-1, Hamamatsu, Japan 430-8650
Tel: [phone]
AUSTRALIA
Yamaha Music Australia Pty. Ltd.
Level 1, 99 Queensbridge Street, Southbank,
Victoria 3006, Australia
Tel: [phone]
COUNTRIES AND TRUST
TERRITORIES IN PACIFIC OCEAN
Yamaha Corporation,
Asia-Pacific Music Marketing Group
Nakazawa-cho 10-1, Hamamatsu, Japan 430-8650
Tel: [phone]
NORTH AMERICA
CENTRAL & SOUTH AMERICA
EUROPE
AFRICA
MIDDLE EAST
ASIA
OCEANIA
HEAD OFFICE Yamaha Corporation, Pro Audio & Digital Musical Instrument Division
Nakazawa-cho 10-1, Hamamatsu, Japan 430-8650
Tel: [phone]
PA11
U.R.G., Pro Audio & Digital Musical Instrument Division, Yamaha Corporation
© 2003 Yamaha Corporation
WB09700 408CRZC1.3-01C0
Printed in Indonesia
Yamaha Manual Library
http://www2.yamaha.co.jp/manual/english/