LY International Electronics PM812 User manual

Public Address System
6 Zones Mixer Amplifier with Paging, USB and Bluetooth
PM812
PM825
PM835
Operation Instructions
Welcome to use our public address system. For better application of this equipment, please read the operation
instruction carefully prior to use.
LY I n t e r n a t i o n a l E l e c t r o n i c s C o . , L t d .
http: //www.lyintlcorp.com/

About Operation Instruction
This operation instruction shall come into effect on the date on which the development of
the integrated power amplifier with partitions PM812/PM825/PM835 equipment is
completed. The operation instruction contains the systematic introduction to the
integrated power amplifier with partitions PM812/PM825/PM835 equipment, precautions
for use, instruction to connection of system, and instructions to operations of products,
and so on. The user shall read this operation instruction carefully prior to connection,
installation and use, and shall operate in accordance with the instructions herein.
The attention must be paid to the instructions with such identification on the back panel of the
machine. Please use or operation the machine following such instruction.
Please keep this operation instruction for the checking in the future.

Warning
In order to prevent the personal injury to user and other persons, the damage to equipment or loss of assets,
please abide by the following basic precautions:
This mark indicates what is prohibited. This mark indicates what must be done.
Check the power line for damage; please do not
unplug by pulling the power cord but unplug
directly; otherwise, it will lead to electric shock,
short circuit or fire.
During the process of use, do not block the vent. It is
required to keep all the vents unblocked in order to
prevent the overheating.
Please do not put this equipment in the
heavily dusty, shocking, extremely cold, or
hot environment
Please do not put any weight on this equipment. Do
not operate switch and button or connect the external
audio source equipment with overexertion.
Prevent the entry of any foreign matter (e.g.
paper and metal) through the clearance or opening
of the equipment into it; in such case, please
disconnect the power supply immediately.
Do not try to remove any component in the
equipment or transform it in any way.
In case of the sudden interruption, or abnormal
smell, or smoking during the operation of the
machine, please unplug the power supply to prevent
the electric shock, fire and other accidents, and ask
the professionals to repair the equipment.
Smell of scorching
Please make sure to unplug the AC power line or
switch off the socket on the wall to achieve the zero
energy consumption if this equipment is out of service
for a long term.

Table of Contents
I. INTRODUCTION TO PRODUCT ........................................................................................................................ 1
1.1 DESCRIPTION OF EQUIPMENT ..................................................................................................................................... 1
1.2 PERFORMANCE CHARACTERISTICS................................................................................................................................ 1
II. DESCRIPTION OF APPEARANCE .................................................................................................................... 2
2.1 DESCRIPTION OF FRONT PANEL ................................................................................................................................... 2
2.2 DESCRIPTION OF REAR PANEL ...................................................................................................................................... 2
III. INSTRUCTION TO CONNECTION ................................................................................................................. 2
PACKING LIST ......................................................................................................................................................... 4
PERFORMANCE SPECIFICATION ....................................................................................................................... 5

*LY* All in one Mixer Amplifiers
1
I. Introduction to Product
1.1 Description of Equipment
PM812/825/835 is a kind of cost-effective professional intelligent address system combining the luxurious and
high-grade aluminum-alloy panel with standard and exquisite case with an elegant appearance, and also suitable
for household, factory, school, hospital, shop and other commercial application. The amplification system of this
equipment is designed with imported power tube, resulting in the strong power, wide frequency band, low noise,
high fidelity and quality at the level of performance. In the equipment, there are six partitions and constant
impedance output in order to facilitate the user to access the back-end loudspeaker. With the perfect and reliable
overload protection, short-circuit protection, and overheat protection, the safety performance of this equipment is
improved. The technical essence of this product is focused on the super adaptability and perfect performance.
1.2 Performance Characteristics
 Four channels of microphone and two channels of line input, and adjustable treble and bass separately;
 With 6-partitions selector, it is possible to select and control every partition separately; the volume is
adjustable separately with indication by indicator lamp; it is also possible to select and control all the
partitions with indication by indicator lamp;
 Built-in bell and alarm generator, controllable volume separately, indicating by indicator lamp and switch,
and bell short-circuit triggering terminal;
 When the built-in alarm generator is started up, the background music is turned off, and the output from six
channels of the partitions will be turned on;
 There are independent volume control and master volume control for sound source input;
 The display of output power level indicator lamps (5 LED lamps) on the front panel;
 With sound source U-disk and bluetooth player, play songs in various document formats such as MP3, WMA,
WAV and ACC;
 Telephone TEL input on rear panel with controllable call volume;
 Four internet ports on the real panel connected to CM12 pager controlled microphone to control the partition
output on a remote basis;
 Built-in 24V DC power input;
 Four channels of microphone, MIC1-4 built-in phantom power, controllable switch independently;
 Fan on the rear panel in the structure of forced heat dissipation, enabling the service of machine for a long
term;
 Output short-circuit protection and giving alarm;
 Priority level function (Default):
Level 1: Telephone (TEL), remote pager;
Level 2: Microphone 1, alarm (SIREN), EMC, bell;
Level 3: Microphone 2, microphone 3, microphone 4, line 1, line 2, MP3 player.

*LY* All in one Mixer Amplifiers
2
II. Description of Appearance
2.1 Description of Front Panel
ALL IN ONE MIXER AMPLIFER PM812
DISTRIBUTOR
VOLUME
BASS TREBLE
POWER
CH1 CH2
1
4
5
23
CH3 CH4 CH5 CH6 ALL CALL
MIC1
VOLUME
BASS TREBLE
MIC2
VOLUME
BASS TREBLE
MIC3
VOLUME
BASS TREBLE
MIC4
MIC LEVEL
VOLUME
BASS TREBLE
AUX1
VOLUME
BASS TREBLE
AUX2
AUX LEVEL
VOLUME
CHIME
VOLUME
SIREN MASTER
MP3
B L U E
USB MP3
VOLUME
MODE
MP3/BLUETOOTH
10
8
6
4
2
OUTPUT
VOLUME
1
4
5
23
OFF
1
4
5
23
1
4
5
23
1
4
5
23
1
4
5
23
OFF OFF OFF OFF OFF
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20 21 22 23
1 Partition CH1 volume adjustment knob
Adjust the volume of the partition CH1, and that
of CH2, CH3, CH4, CH5, CH6 and so on.
2 Partition CH1 switching key
Press this key to turn on the partition CH1, and
then partition CH2, CH3, CH4, CH5, CH6, and
so on.
3 Partition CH1 turn-indicator lamp
When partition CH1 is turned on, this indicator
lamp is alight, and that of CH2, CH3, CH4, CH5,
CH6 and so on.
4 All partitions control key
Press this key to turn on all the partitions.
5 All partitions indicator lamp
Press key 4 to turn on the paging for all the
partitions, and this indicator lamp is alight.
6 Output level indicator lamp
Display the output level.
7 MP3/bluetooth player control key:
: MP3 and AUX switching key
: Previous song key;
: Next song key;
: Play/pause key;
8 Digital display screen (8888)
9 USB port
Support 32GU disk.
10 MP3 volume adjustment knob
Adjust the volume of MP3.
11 Microphone MIC1 bass adjustment knob
BASS
Taking central position as benchmark, turn
counterclockwise to attenuate the base, and turn
clockwise to enhance the base, and then MIC2,
MIC3, MIC4 and soon.
12 Microphone MIC1 volume adjustment knob
Adjust the volume of microphone MC1, then that
of MIC2, MIC3, MIC4 and so on.
13 Microphone MIC1 treble adjustment knob
TREBLE
Taking central position as benchmark, turn
counterclockwise to attenuate the treble, and turn
clockwise to enhance the treble, and then MIC2,
MIC3, MIC4 and so on.

*LY* All in one Mixer Amplifiers
2
14 Auxiliary input AUX1 bass adjustment knob
BASS
Taking central position as benchmark, turn
counterclockwise to attenuate the base, and turn
clockwise to enhance the base, and so on.
15 Auxiliary input AUX1 volume adjustment
knob
Adjust the volume of auxiliary input AUXI, and
that of AUX2, and so on.
16 Auxiliary input AUX1 treble adjustment knob
TREBLE
Taking central position as benchmark, turn
counterclockwise to attenuate the treble, and turn
clockwise to enhance the treble, and that of
AUX2 and so on.
17 Bell volume adjustment knob
Press the key 18 to turn on the bell, and turn this
knob to adjust the output volume of the bell.
18 Channel bell switching key
Press this key to turn on the bell.
19 Siren volume adjustment knob
Adjust the volume of siren.
20 Siren on-off button
21 Master volume adjustment knob
Adjust the level of all the signals.
22 Power switch
23 Power indicator lamp

*LY* All in one Mixer Amplifiers
2
2.2 Description of rear panel
~220V/50Hz/6A
F6AL
F4AL
PM835PM812
FB-AC
PM825
F8AL
FB-DC F15AL F25AL F30AL
FUSE TYPE
DC POWER INPUT
GND.+24VDC
MICRO 4MICRO 3MICRO 2MICRO 1
GAIN GAIN GAIN GAIN
PHANTOM MIC
OUT AUX2
IN
PHANTOM MIC PHANTOM MIC PHANTOM MIC
AUX1
IN
TEL
MIN MAX
EMC
IN
FB-AC
FB-DC
4-16? 22V 32V 38V
RISK OF ELECTRIC SHOCK
DO NOT OPEN
ATTENTION: RISQUE DE CHOC ELECTRIQUE-NE PAS OUVRIR
100V
COM
100V
ZONE2ZONE1 ZONE4ZONE3
ZONE OUTPUTS 100V
ZONE6ZONE5
COM
100V
COM
100V
COM
100V
COM
100V
COM
CALL STATION
13 2 4
COM
100V
70V
P1
CHIME
ACTIVE
CHIME
SPEAKER OUTPUTS
Nur Sicherung 250V
Use Only With A 250V Fuse
Employer Unlquement Avec
Fusible De 250V
FUSE
PUSH PUSH PUSH PUSH
1
2
3
4
5678
9 10 11 12 13 14 15 1716 18
1 Power line socket
Connect ~220V/50Hz power supply.
2 Grounding terminal
3 Fuse holder
4 24V connection terminal
5 Output terminal (ZONE1-6):
The partitions may be connected to loudspeaker
lines at will.
6 Output terminal
Connect 4-16Ω or 70V/100V loudspeaker
output.
7 Bell triggering terminal
8 Remote paging control interface
Connect CM12 pager control microphone to
control the partition output on a remote basis.
9 Telephone input terminal (TEL IN)
It is used for remote telephone paging.
10 Telephone volume control knob
Adjust the volume of telephone input with the
screwdriver.
11 Auxiliary output socket (To connect another
power amplifier)
0dB, 600Ω, unbalanced output type, output of
all the input signals.
12 Auxiliary input socket (AUX1)
Connect CD or other sound sources.
13 Auxiliary input socket (AUX2)
Connect CD or other sound sources.
14 Emergency input socket (EMC)
Used for input of fire signal.
15 MIC1 gain adjustment control knob
In order to prevent sever clipping of balanced
phantom input, reduce gain properly, and then
for MIC2, MIC3, MIC4 and so on.
16 +48V phantom power control switch
Control MIC1, MIC2, MIC3, MIC4 separately.
17 Microphone MIC1 input socket
And for MIC2, MIC3, MIC4 and so on.
18 Cooling fan outlet

*LY* All in one Mixer Amplifiers
2
III. Instruction to Connection
Note: Please refer to the connection mode of CM12 for the connection between PM812 and CM12. Please see the
operation instruction to CM12.

*LY* All in one Mixer Amplifiers
3
Precautions for safety in use
1. Precautions for safety in use
 Before connecting the system line properly, do not insert the power plug of this equipment into the grid.
 Ensure the voltage input to the equipment shall be fully consistent with the voltage of this equipment to
prevent the risk in the burning of the equipment.
 There is the hazardous voltage in the machine, which is sufficient to cause the electric shock to the person.
Please do not open the machine housing without authorization to prevent the hazard of electric shock.
 In the event that the power supply to this equipment is turned off, the machine is not fully disconnected with
the power supply of the grid. For the purpose of safety, please pull the power plug out of the socket when the
equipment is not in service.
 Please do not put the equipment in the extremely cold or hot place.
 Ensure the good ventilation in the working environment of the equipment, to prevent the damage to the
equipment due to the heating in working and excessively high temperature.
 In the rainy and humid days or if the machine is not in service for a long term, please pull out the power plug.
 Before removing or reassembling any part of the equipment, disconnecting or reconnecting any electrical
plug or other connections of the equipment, be sure to pull out the power plug to ensure the full
disconnection of the equipment with the grid.
 In case of any fault in the equipment, the non-professional person shall not disassemble the housing for repair
without the approval, in order to prevent accident or aggravate the damage to the equipment.
 Do not put any corrosive chemicals nearby or on the equipment.
2. Precautions for after-sales service
 In case of the installation and operation according to this instruction, the company will provide the free
warranty service (Including replacement of parts free of charge) for any problem in the normal operation for
three years since the date of purchase.
 In case of the warranty, the user shall show the user’s voucher of warranty card and the invoice as the
certificate.
 In any of the following cases, the free warranty shall not be applicable:
1. The damage to the product due to the incorrect installation, use or handling;
2. The damage to the product due to the abnormal conditions (e.g. excessively high power voltage or ambient
humidity);
3. The damage to the product due to natural and man-made disaster and other accidents;
4. The number on the product body is changed, altered or removed;
5. The product has been repaired or refitted by the person other than those authorized by the company;
 Please keep the operation instruction and warranty card properly.
 For the issue or matter not covered herein, please contact the distributor or visit http://www.lyintlcorp.com.
 In case of any fault occurred during the period of warranty, please contact the service personnel of our
company (or distributor); our company will not take responsibility for the damage due to the unauthorized
disassembly or the repair by the person other than the technicians of our company.

*LY* All in one Mixer Amplifiers
4
Packing List
No. List Quantity
1 Power amplifier 1 set
2 Warranty card 1 copy
3 Certificate 1 copy
4 Operation instruction 1 copy
5 1500MM double-modulator audio cable 1 piece
6 4P green plugs 4 pieces
7 2P green plugs 1 piece
8 10A GB power line /16A European-type power line (Optional) 1 piece
9 H21-612 remote controller 1 piece
10 6.35R lotus plug 2 pieces

*LY* All in one Mixer Amplifiers
5
Performance specification
Type PM812 PM825 PM835
Rated power 120W 250W 350W
Constant voltage output 70V, 100V
Constant impedance output 4-16Ω (balanced, not grounded)
Line input sensitivity 300mV(±50mV), 1kHz/unbalanced;
Microphone input sensitivity 3.0mV(±0.5mV), 1kHz/unbalanced;
5.5mV(±0.5mV), 1kHz/balanced
EMC input sensitivity 300mV(±50mV), 1kHz/unbalanced;
Telephone sound source input
sensitivity 300mV(±50mV), 1kHz/unbalanced;
Frequency response
MIC: 100Hz-18kHz (±3dB);
TEL: 100Hz-18kHz (±3dB);
LINE: 80Hz-20kHz (±3dB);
Tune control ±10dB (Bass: 100Hz);
±10dB (Treble: 10KHz);
Signal to noise ratio
MIC: ≥55dB;
TEL: ≥65dB;
LINE: ≥75dB;
Auxiliary line output 0dBV, unbalanced
Remote microphone input 2000mV, balanced
Protection function Overload protection, short-circuit protection, temperature protection
Total harmonic distortion ≤ 1% (1kHz, normal working condition)
Output adjustment rate From full load to no load, ≤3dB
Power consumption 250W 500W 650W
Dimension of machine (L×W×H mm) 483×413×132
Dimension of packing (L×W×H mm) 540×510×200
Net weight 14kg 17kg 19kg
Gross weight 16.5kg 19.5kg 21.5kg
Attention
 If the power switch of the equipment is “off”
, the machine is not disconnected to the grid; for the purpose of
safety, please pull the power line plug out of the socket if this equipment is not in service.
 This equipment shall not suffer from water dripping or spraying. D
o not place the vase full of water onto the
equipment.

Do not open the cover plate of the machine without authorization to prevent electric shock. The repair shall
be conducted by the professional with professional certificate if necessary.
 The terminal marked with in the equipment indicates the hazardous electrification. T
he connection of
such terminal shall be completed by the trained personnel.
 This equipment is connected to the power su
pply of the grid with the power line plug; in case of any fault or
risk in the equipment, pull out the power line plug to disconnect the connection between the
equipment and
the grid; therefore, the power line plug shall be put in the place easy for plug-in/out of the power line.
LY International Electronics Co., Ltd.