Cayin CS-845A Manual de usuario

User's Manual

Vacuum Tube Integrated Amplifier

CS-845A

POWER

ON OFF

A1A2

BIAS SEL.

VACUUM TUBE INTEGRATED AMPLIFIER CS-845A

SELECTOR

0dB

LINE1PRE- IN

LINE2LINE3

VO LUM E

MI N MAX

NFB.

-3dB

Table of Contents

Thanks for choosing CAYIN CS-845A Integrated Amplifier and please read the user's manual

carefully before installation and operation.

In order to prevent damage during transportation, the amplifier is packed with protective foams surrounding

the tubes. Before installation and operation, please remove these foams to avoid any risks.

Vacuum Tube

Table of Contents

Package Contents…………………………………………………………………………………………………………2

Product Features…………………………………………………………………………………………………………3

Safety Precautions………………………………………………………………………………………………………3

Specifications………………………………………………………………………………………………………………4

Maintenance………………………………………………………………………………………………………………5

Warranty Service…………………………………………………………………………………………………………5

Precautions…………………………………………………………………………………………………………………6

Front Panel…………………………………………………………………………………………………………………7

Rear Panel…………………………………………………………………………………………………………………8

Top Panel……………………………………………………………………………………………………………………9

Remote Control…………………………………………………………………………………………………………10

Installation………………………………………………………………………………………………………………11

Tube Replacement ……………………………………………………………………………………………………11

Audio Connection………………………………………………………………………………………………………12

Speaker Connection……………………………………………………………………………………………………13

Turn on……………………………………………………………………………………………………………………14

Small Tips…………………………………………………………………………………………………………………14

Troubleshooting ………………………………………………………………………………………………………15

……………………………………………………………………………………………… 1…………

Please carefully check the package first and then open it.

Package contents include:

1. CAYIN CS-845A 1 piece

2. Main Fuse 2 pieces

3. Power cord 1 piece

4. Remote Control 1 piece

5. (AAA) Battery of 1.5V 2 pieces

6. Users' 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 CS-845A Vacuum Tube Amplifier is designed and manufactured with our original parts and

reaching the best results. We are not responsible for problems and damages caused by non-original parts

replacement in the amplifier.

Integrated

NOTE:

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.

Product Features

Safety Precautions

◆ Hand-made construction with the finest point-to-point wiring.

◆ Two EI output transformer with wide bandwidth are applied.

◆ Specially designed toroid transformer for power supply.

◆ WE6SN7 has been used for voltage amplification.

◆ 300B with Porcelain base has been used for drive amplification.

◆ 845 vacuum tube has been used for Single-end Class A amplification.

◆ Switchable between different negative feedbacks. It outputs soft, clean, original sound if

operated at -3dB NFB. Otherwise it output open, bold sound in details if operated at 0dB NFB.

◆ External 300B Hum Balance Adjustment is accessible.

◆ External user BIAS Adjustment is accessible with the BIAS meter for monitoring on the top of

the amplifier.

◆ Equipped with remote control.

◆ Can be used as a Power Amplifier.

◆ CS-845A can memorize last operation of the unit once turned off.

◆ With high voltage delay function.

◆ High-quality Japanese ALPS motor potentiometer.

◆ Thickly silver plated signal cable has been used.

◆ Equipped with easily-installed tube cover for protection.

vacuum tube

Specifications

Power Output

24W+24W

Frequency Response

10Hz~26kHz (-3dB)

THD

0.3% (1W/1kHz;5% Under Rated Power)

S/N Ratio

90dB

Input Sensitivity

300mV (Integrated)

1300mV (Pre-IN)

Input Impedance

100kΩ

Output Impedance

4Ω, 8Ω

Input Terminals

LINE1,LINE2,LINE3,PRE-IN

Tube

WE6SN7×2、300B×2、845×2

WDH

420mm×389mm×240mm

Net Weight

37kg

Max Power Consumption

380W

Working Condition

Temperature：0℃～40℃ Moisture：20%～80%

Storage Condition

Temperature：-20℃～70℃ Moisture：20%～90%

◆ 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.

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.

Maintenance

NOTE:

◆

◆ Do not use any chemicals for cleaning.

Use the soft dry cloth to clean up the chassis regularly.

The information in this manual is subject to change without

further notice.

NOTE:

POWER

ON OFF

A1A2

BIAS SEL.

VACUUM TUBE INTEGRATED AMPLIFIER CS-845A

SELECTOR

0dB

LINE1PRE- IN

LINE2LINE3

VO LUM E

MI N MAX

NFB.

-3dB

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.

Connection of power cord:

Connect the speaker cables and signal cables first and then insert the power cord into the power socket.

NOTE:

YALIDA

YN-401

Connected to AC INPUT

Connected to power socket

INPUT

LINE1LINE2LINE3PRE-IN RIGHT SPEAKER OUTPUT LEFT SPEAKER OUTPUT

T3.15AL250V

OUTPUT

TAPE OUT 230V 50Hz 380W

Front Panel

2. Power indicator

Turn on the amplifier the power indicator will be

on.

Power Switch

Used to switch on/off the amplifier.

Note: Unplug the power cord if you're not going to

use the product for an extended period of time.

NFB. Selector

Used to choose NFB.0dB or NFB.-3dB

Power Indicator/Mute Indicator

Used to indicate the working state. The indicator

will be on when it is working normally. The

indicator will flicker for 30 seconds when it delays

to work. The indicator will keep flickering when it

is at mute state.

Volume Knob

Used to control volume

Input Selector Knob

You can hear sound from LINE1 when LINE1

indicator is on.

Bias Selector Switch(A1、A2)

Used to select corresponding tube for bias

adjustment.Bias Adjustment Switch(A1、A2)

4. Switch

You can hear sound from LINE2 when LINE2

indicator is on.

You can hear sound from LINE3 when LINE3

indicator is on.

You can hear sound from PRE-IN when PRE-IN

indicator is on.

Cayin CS-845A can memorize last operation of

the unit once turned off.

The NFB.-3dB indicator will be on when it is

-3dB；

Cayin CS-845A can memorize last operation of

the unit once turned off.

IR Remote Sensor

Used to receive the code of remote control.

working state.

Input Selector Button

Used to select four kinds of audio sources.The

input selection indicator will be on according to

the input audio sources.This function can be

operated on the remote control.

NFB.Indicator：

10.

The NFB.0dB indicator will be on when it is 0dB。

1 62

POWER

ON OFF

A1A2

BIAS SEL.

VACUUM TUBE INTEGRATED AMPLIFIER CS-845A

SELECTOR

0dB

LINE1PRE- IN

LINE2LINE3

VO LUM E

MI N MAX

NFB.

-3dB

3 4 5 8 1 0

Rear Panel

Signal Input Terminal

Used for audio source input.

2. Signal output Terminal

Used for audio source output.

Right Channel Output

Used to connect with the right channel of speaker.

Left Channel Output

Used to connect with the left channel of speaker.

Power Socket with Main Fuse

Main fuse is located just below the power socket.

Replace the fuse with the same type and value.

1 3 4 5

INPUT

LINE1LINE2LINE3PRE-IN RIGHT SPEAKER OUTPUT LEFT SPEAKER OUTPUT

T3.15AL250V

OUTPUT

TAPE OUT 230V 50Hz 380W

Top Panel

1.Be careful of the high temperature of the tubes during operation.

2.Replace the tubes carefully and correctly.

3.Power tubes must be matched for well function.

NOTE:

2.A1、A2:845 Tube

4.V1、V3:WE6SN7 Tube

5.V2、V4:300B Tube

1 HUM BALANCE Adjustment Switch

Used to adjust bias of corresponding power

tube(A1、A2)

Bias Meter

Used to monitor the working current of the

power tube.

How to adjust the HUM:

Turn the volume knob to the minimum or mute

and adjust the HUM BALANCE with the flat

screwdriver until you heard the smallest HUM.

Do the same for adjusting the other channel.

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. Bias adjustment for A1 A2 are the same.

After all have been adjusted, do it one more time

to make sure all the bias levels of A1,A2 are the

same.

Sample of bias adjustment for power tube A1:

1. Turn the Bias Selector Switch A1 to its opposite

direction without releasing it.

2. Adjust the corresponding Bias Adjustment Switch

A1 with flat screwdriver until the pointer of the

bias meter keeps in the center.

3. Adjustment for A2 are the same.

Diagram 5

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 4

Bias meter when not working

V2V4

V1V3

HUM BAL.

A1A2

BIAS ADJ.

1 3 61

2 2

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