Cayin 9084D MK2 User manual

User's Manual
POWER
9084D MK2
MONO BLOCK POWER AMPLIFIER OFF
ON
MONO BLOCK POWER AMPLIFIER
9084DMK2

1
Thanks for choosing CAYIN 9084D MK2 and please read the user's manual
carefully before installation and operation.
Mono Block Power Amplifier
Table of Contents
Table of Contents………………………………………………………………………………… 1
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……………………………………………………………………………………………………………3
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………………………………………………………………………………………………………………4
Maintenance…………………………………………………………………………………………………………………5
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…………………………………………………………………………………………………………………12
Small Tips …………………………………………………………………………………………………………………12
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Package Contents
Product Features
Safety Precautions
Specifications
Warranty Service
Precautions
Front Panel
Rear Panel
Top Panel
Installation
Tube Replacement
Audio Connection
Turning on
Troubleshooting

Please carefully check the package first and then open it.
Package contents include:
1. CAYIN 9084D MK2 1 piece；
2. Main Fuse 2 pieces；
3. Power cord 1 piece；
4. User's Manual 1 piece；
Please make sure local voltage level is matched with the input level of the amplifier,which indicates on the
rear panel. Too low or too high voltage may cause problem. Please contact our company or our local agent if
you've found improper voltage.
Recommendation:
Keep all packing materials for future use .
CAYIN 9084D MK2 Mono Block Power Amplifier
reaching the best results. We are not responsible for problems and damages caused by non-original parts
replacement in the amplifier.
is designed and manufactured with our original parts and
NOTE:
2
Package Contents
All other parts except above are not included.
NOTE:

1. Unplug the power cord if you are not going to use the product for an extended period of time.
2. The machine will become hot after working for a long time. Please keep the unit's ventilation open and install
the amplifier at a well-ventilated place to avoid troubles and fire hazard.
3. Forbidden to operate when the output is open or shorted.
4. Do not attempt to service this product yourself. Opening the cover may expose you to dangerous voltage or
other hazards.
5. We are not responsible for any problems caused by checking and opening without permission of our
company. For service, Please contact a qualified service technician.
6. Do not place any objects filled with liquids such as vases or some others on the top or around.
7. Clean only with dry cloth.
8. Please move the amplifier carefully not to drop the unit or be subject to other strong shocks.
3
Product Features
Safety precautions
◆ Hand-made construction with the finest point-to-point wiring.
◆ External user Bias Adjustment is accessible with the BIAS meter for monitoring on the top of the amplier.
◆ External 845 HUM balance adjustment is accessible.
◆ Soft start function (about 30 seconds).
◆ Thickly silver-plated signal cable has been used.
◆ Equipped with easily-installed tube cover for protection.
◆EI output transformer with wide bandwidth are applied.
◆Specially designed toroid transformer for power supply.
◆TUNG-SOL 6SL7 and 6SN7GTB has been used for voltage amplification.
◆Full music 300B together with Shuguang 845 vacuum tube has been used for Single-end
Class A amplification.
◆Input stage has taken America rectifier RCA 22DE4 for voltage regulation.

4
Specifications
◆ To reduce the risk of electric shock, do not remove the cover.
◆ No user serviceable parts inside. Refer servicing to qualified
service personnel.
◆ To reduce the risk of fire or electronic shock, do not expose
the unit to rain or moisture.
The lightning flash with arrowhead symbol is intended to alert user to the presence of uninsulated
“dangerous voltage” within the product's enclosure that may be of a risk shock to persons.
The exclamation point is intended to alert user to the presence of important operation and maintenance
(servicing) instructions accompanying the appliance.
【 】
【Frequency Response】
【THD】
【S/N Ratio】
【Input Sensitivity 】
【Input Impedance】
【Output Impedance】
【Max Power Consumption】
【Tube】
【WDH】
【Net Weight】
【Working Condition 】
【Storage Condition】
Power Output
28W＋28W(8Ω RMS)
15Hz～33KHz(-3dB)
%（1KHz）
85dB
1000mV
100KΩ
4Ω，8Ω，16Ω
6SL7×1、6SN7×1、300B×1、845×1、22DE4×1
Temperature °C °C Moisture
Temperature °C °C Moisture
2
200W
286×482×239mm³
32.5kg
0 ~40 20%~80%
-20 ~70 20%~90%
RISK OF ELECTRIC SHOCK
CAUTION
DO NOT OPEN

Warranty Service
1.This product is warranted for a period of twelve months beginning from the date of purchase.
2.The defective product must be returned to your dealer or our company for repairing when your dealer or our
company accepts your requirement.
3.The warranty doesn't extend to any product that has been opened by you without permission of our company.
NOTE:
◆
◆
Use the soft dry cloth to clean up the chassis regularly.
Do not use any chemicals for cleaning.
Maintenance
5
The information in this manual is subject to change
without further notice.
NOTE:
POWER
9084D MK2
MONO BLOCK POWER AMPLIFIER OFF
ON

Precautions
◆ Connect the power only after finishing other connections.
◆
◆
◆
It is normal that power transformer becomes hot for extended period of operation.
Unplug the power cord if you're not going to use the product for an extended period of time.
Please make sure corresponding voltage is the same as required. We are not responsible for damage caused
by misuse of unsuitable voltage.
6
Connected to AC Input
NOTE:
Connected to the power socket
Connection of power cord:
Connect the speaker cables and signal cable first
and then insert the power cord into the power socket.
16
SPEAKER OUTPUT INPUT
MONO BLOCK POWER AMPLIFIER
RISK OF ELECTRIC SHOCK
CAUTION
DO NOT OPEN
9084DMK2
ZHUHAI SPARK ELECTRONIC EQUIPMENT CO.,LTD.
AC INPUT
230V 50Hz 200W
T2AL250V
YALIDA YN-401

7
Front Panel
Used to monitor the working current of the power tube.
②.Power Switch：
Used to switch on/off the amplifier.
③.
When starting up, the indicator light.
①Bias Meter
Power indicator
.
321
POWER
9084D MK2
MONO BLOCK POWER AMPLIFIER OFF
ON
A
Diagram (一)2
Bias meter during working
Note: When working normally,
the pointer should stay within
the A zone, still , it would move
for the voltage fluctuation.
Diagram (一)1
Bias meter when not working
Diagram 一

8
Rear Panel
①
②
③
.Power Socket with Main Fuse
Main fuse is located just below the power socket.
Replace the fuse with the same type as indicated.
. Channel Output
Used to connect with the right channel of speaker.
.Signal Input Terminal
Used for audio source input.
16
SPEAKER OUTPUT INPUT
MONO BLOCK POWER AMPLIFIER
RISK OF ELECTRIC SHOCK
CAUTION
DO NOT OPEN
9084DMK2
ZHUHAI SPARK ELECTRONIC EQUIPMENT CO.,LTD.
AC INPUT
230V 50Hz 200W
T2AL250V
12 3
Diagram 二

Top Panel
9
NOTE
◆ Be careful of the high temperature of the tubes during operation.
◆ Please replace the power tubes after switch off in 20 minutes, and follow the suggetion to unplug the
inset the tubes.
◆ Power tubes must be matched for well function.
◆ Forbidden to make the pointer of the bias meter out of the A zone when adjusting the power tube.
◆ Make sure the supply voltage is 230V before bias adjustment.
◆ Even under normal working state, the point of the bias meter could move for the voltage fluctuation.
① (845)
②Bias Adjustment (845)
Used to adjust bias of corresponding
power tube(845)
Bias Selector Switch(845)
Used to select corresponding tube for
bias adjustment.
.HUM Balance
.
.
.V1:6SL7 .A1:845
. . DE
.
③
④ ⑤
⑥V2:6SN7 ⑦V4:22 4
⑧V3:300B
86 74 52 3
1
BIAS ADJ.
845
845
845
HUM BAL.
BIAS SEL.
V3 300B
/
V2 6SN7
/
V1 6SL7
/
V4 22DE4
/
A1 845
/
How to adjust the 845 HUM:
Turn the volume knob to the minimum or mute,
adjusting the HUM BALANCE with the flat
screwdriver, until you hear the smallest HUM.
The same for adjusting the other channel.
Mount and dismount the 845 vacuum tube:
Clockwise rotation for mounting, and
counterclockwise rotation for dismounting.
Mount and dismount the 300B vacuum tube:
The thick pin is for the large hole on the tube
socket, and the thin pin is for the small hole on
the tube socket. And please insert and extract
vertically.
Diagram 三
Bias adjustment for the power tube:
Turn the Bias Selector Switch to its opposite
direction without releasing it, adjust the
corresponding Bias Adjustment Switch with
flat screwdriver, and inspect the Bias Meter
on the top panel to make sure the pointer
keeps in the center.

Carefully read and follow the manual for installation:
◆ Do not place the machine near heat sources such as radiators, heat registers or other products that produce
heat.
◆ In order to avoid being overheated please keep the unit's ventilation open.
◆ Do not expose this appliance to rain or moisture.
◆ Keep the amplifier in a certain distance so that it can be easily connected.
◆ Amplifier should install steadily and make sure all four feet are on the same level.
◆ Keep the amplifier over 15cm's distance to the surrounding walls.
Installation
Please make sure local voltage level is matched with
the input level of the amplifier, which indicates on the
rear panel. Too low or too high voltage may cause
problems or shorten the amplifier's life.
Tube Replacement
NOTE:
Tubes for the Machine Tubes Replacement
10
6SL7
6SN7
845
300B
22DE4
6SL7GT、6H9C、ECC35、6N9P
6SN7GT、6H8C、ECC32、6N8P
845
300B
22DE4

Audio Connection
Connection method of CAYIN 9084D MK2 with other audio equipments Take pictures below for your reference.
•
•
•
•
•
Pleace refer to the manuals of other connected
equipments during the installation.
Do not insert the power cord into the main socket
before all other equipments are well connected.
R refers to right channel while L represents left
channel.
Please take the right guidance for connection as
wrong connection may cause noise, low-grade
function or damage.
Do not fasten signal cable together with power
cable and speaker cables. It will worsen the
acoustic fidelity.
Wrong connection
Right connection
NOTE:
speaker
（Right）
HIFI COMPACT DISC PLAYER
ON OFF
kHz
bit
192
24
MUTE
SOURCE
CDT- AMK2
15 VACUU M TU BE TRANSISTOR ANALOG OUTPUT
RED
BLACK
speaker
（Left）
BLACK
RED
STER EO PRE-AMPLIFIER
RISK OF ELECTRIC SHOCK
CAU TION
DO NOT OPEN
SC-6L S MK2
ZHU HAI SPA RK EL ECT RONI C EQUIP MENT CO. , LT D. T500 AL250Vm
OUTPUTINPUT
1234OUT1OUT245
16
SPEAKER OUTPUT INPUT
MONO BLOCK POWE R AM PLIFI ER
RISK OF ELECTRIC SHOCK
CAU TION
DO NOT OPEN
9084DMK2
ZHUHAI SPARK ELECTRONIC EQ UI PM ENT CO.,LT D.
AC INPUT
230V 50Hz 200W
T2AL250V
16
SPEAKER OUTPUT INPUT
MONO BLOCK POWE R AM PLIFI ER
RISK OF ELECTRIC SHOCK
CAUTION
DO NOT OPEN
9084DMK2
ZHUHAI SPARK ELECTRONIC EQ UI PM ENT CO.,LT D.
AC INPUT
230V 50Hz 200W
T2AL250V
To audio output terminal
11

•
•
•
Turn on the amplifier, the power indicator will be on and
the working indicator will keep flickering.
The working indicator will be on after 30 seconds. It
means that the amplifier is working normally. If the
working indicator is off, please turn off the power and
contact with our local agent or our company.
Select the right audio source channel, adjust the volume
to a certain position and then you can enjoy themusic
you prefer.
NOTE：
◆Turn on: CD player- decoder- pre-amplifier-
power amplifier
◆Turn off: power amplifier- pre-amplifier-
decoder- CD player
Turning On
Before turning on the amplifier please make sure all connections are right and power supply is stable.
1. When the audio system is under working state, don't
unplug the signal cable or speaker cables, or it will
cause damage to the amplifier and other equipments.
2. It should at least takes 2 minutes before you turn on the
power again, or it will cause damage to the vacuum
tubes.
NOTE:
Read the Manual—— Please read the user's manual carefully before installation and operation.
Keep the Manual——Please keep the manual for future reference.
Warning Signs——Don't tear off or rub off the serial number.
Operation——Do the operations as you are instructed in the Manual.
Parts—— If you are going to use parts not supplied by our company like power cord, fuses etc please
make sure that parts you used are compatible with the safety requirements. Or it will cause fire or electric
shock.
Placement——Put the amplifier on a level place. Make sure that it doesn't bring damage to the children,
adults and the amplifier itself.
Power——Please make sure the local voltage is the same level as indicated on the rear panel.
Overload——If the power socket is overloaded with other equipment, it will cause fire or electric shock.
Warranty Service——Do not open the product and change the components inside yourself. Opening
the cover may expose you to dangerous voltage or other hazards. The warranty doesn't extend to any
product that has been opened by you without permission of our company.
Troubleshooting——If any problems when you are using the product, please check according to
following tips to look for the exact reason. Please contact with our company if you can't solve the
problem.
Sm all Ti ps
12

Please follow the instruction in the manual in order to keep the amplifier work in its best state. If wrongly
operated and you thought that would be troubles please check according to following tip to look for the exact
reason.
NOTE: is the registered trademark of Zhuhai Spark Electronic Equipment Co., Ltd.
Troubleshooting
Problem Cause Remedy
NO OUTPUT
Power is OFF.Indicator
Power is ON.Indicator
Noise output
Sound field Positioning
is not so good.
Power cord is not well-connected.
Main fuse is out.
NO signal input.
Ground of input signal cable is open
or bad contact of the input signal
cable.
Components or circuits are in trouble.
Signal input cables or speaker
cables are wrongly connected.
Check power cable connection
or power outlet connection
Replace with the same type
and value fuse.
Check the function of the
sound source.
Check the input selection and
switch to the proper input.
Replace the input signal
cable with a new one.
Please contact with local
agents or our company.
Reconnect it as suggested in
the manual.
13