Panasonic CY-PA4003U User Manual

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 Never mount the unit in any of the following locations 

to avoid damage due to overheating;

  • Near the heater port. 
  •  Places like the dashboard or rear deck, where it may 

be exposed to direct sunlight. 

 Do not mount the unit near the door, where it could 

be exposed to rain. 

 You run the risk of interfering with the mounting or 

causing damage by drilling into the gas tank, a wiring 
harness, or other component. 

 Keep a safe distance between the unit and other 

electronic equipment. 

 If this unit is operated at a high output continuously, 

the upper side of the unit will get very hot. Do not 
touch it nor place anything on top of the unit. 

 When a short circuit occurs, such as in the speaker 

output terminal, etc. the overload protection circuit 
will operate. This circuit protects the power amplifi er 
from further damage when a short circuit occurs. 
Operation will temporarily stop. In this case, check 
the cause of the short-circuit and if the problem is 
fi xed, normal operation will resume. 

 Since the power amplifi er has a very large output, the 

unit should be installed in the trunk of your car. 

 Do not install this unit under a carpet, otherwise the 

unit may fail because of immature heat dissipation.

 Use the spacer included when installing the unit so 

  If the fan and air hole on the base side of the unit are 

covered, the unit will become extremely hot and may 
fail.

1  Make the temporary connections.
2  Confi rm the proper operation of the unit.
 

Confi rm the proper connection and setting, and no 
blowout of the fuses.

3  Confi rm after the installation of the unit that the spare 

tires, the jack, the tools, etc. can be picked up without 
obstruction.

 Tapping Screw 
 (5 

mm

20 mm)

 Plain Washer (5 mm

)

Drill four holes 
3.5 mm



Metallic panel 
(thickness: more 
than 15 mm {

5

/

8

})

321 mm 
{12

11

/

16

}

178 mm 
{7

1

/

16

}

 Please follow the laws and regulations of your 

 We strongly recommended you to wear gloves for 

 Be sure to grip both sides of this unit securely 

  Since this unit is quite heavy, the unit may fall down 

and this can lead to an accident or injury.

 Disconnect the cable from the negative () battery 

terminal (see caution below). 

 If your car is equipped with air bag and/or anti-

 Before attempting installation of this electronic 

 FAILURE TO FOLLOW THE PROCEDURE MAY 



Tapping Screw 
(5 mm

20 mm)

4



Plain Washer 
(5 mm

)

4



Allen wrench

1

Note: 
 For power connection, use the optional power cord 

 Use only the supplied screws for installation. If parts 

are missing please consult with your Panasonic dealer 
for advice. 



Speaker input 
connector

2





Terminal cover 
for short-circuit 
prevention

2

  CY-PA4003U: 2 (1 for front speaker, 1 for rear speaker) 
 

CY-PA2003U, CY-PAD1003U: 1 (for left/right speaker) 



Spacer

4



Tapping Screw 
(5 mm

40 mm)

4

 Tapping Screw 
 (5 

mm

40 mm)

 Plain Washer (5 mm

)

Drill four holes 
3.5 mm



Metallic panel 
(thickness: more than 15 mm {

5

/

8

})

291 mm 
{11

1

/

2

}

178 mm 
{7

1

/

16

}

 Spacer

Note: 
 If you wish to install the unit without using the spacer 

included, drill holes in the Metallic panel etc so that the 
fan and air holes on the base side of the unit are not 
covered.

Fan

Air hole