1.  AM and FM station can’t manual select

AM and FM station can’t manual select

                            

	  	

Check SW501

Check 3P wire CN 505 and CN502a tightly                 connect

NG

No

OK

Exchange TU PWB ass’y(4-0DC011-U-PATU)

Firmly connect CN502 and NC502a wire

Yes

Exchange control PWB ass’y(4-0DC011-U-PAFR)

Properly connect CN501 2P wire

Yes

No

Exchange 2  new AA battery

(C) check AA battery capacity

(B) check AA battery contact
battery spring

(A) check 2 AA battery installed       properly 

OK

NG

Yes

No

Yes

No

Yes

Check clock display on AC/DC power

Check CN501 2P wire tightly connect

Properly installed 2 AA battery in order to completely contact battery spring or exchange BATT A/B PCB ass’y

See unit can’t display and no sound troubleshooting guide(item 6)

Display is OK on AC
power , but reverse on AA battery

Clock no display on AA battery

No

Yes

      2. Clock no display on AA battery

Properly installed 2 AA battery

Exchange contort PWB ass’y (4-0C001-U-PAFR)

No

No

Exchange MAIN PCB ass’y (4-0DC011-U-PAMAIN)

Properly insert FM antenna

Yes

FM antenna broken

FM ant wire and CN201 broken and open circuit

Unit can’t receive FM station

Check unit can receive AM  station

Yes

3. Unit can’t receive FM station

4. Unit can’t receive AM station

AM magnetic bar broken

No

Yes

AM coil and magnetic bar loose

No

Check Unit can receive FM station

Unit can’t receive AM station

Add wax to mount AM coil

Yes

Exchange MAIN PCB ass’y (4-0DC011-U-PAMAIN)

Exchange Main PCB ass’y (4-0DC011-U-PAMAIN)

NG

Exchange AUX INPUT PCB ass’y(4-0DC011-U-AUX)

properly connect AUX
wire and connector

properly connect CN1 and CN301

Check AUX wire and CN3 connect

Change to new sound source or mend sound source

Tightly insert aux   connection wire and mounted Jack

See unit can’t display and no sound troubleshooting guide (item 6)

Aux connection wire tightly insert and Jack is completely mounted

Yes

No

AUX function no sound

OK

NG

OK

OK

NG

check CN1 and CN301 connect

Yes

NO

Check sound source unit normally work

NG

OK

Confirm AM/FM function speaker sound

5 AUX function no sound

6. AC Input, Unit can’t display and no sound

Check transformer and fuse

NG

Exchange the volume PWB ass’y (4-0DC011-U-PAVOL)

NG

properly connect all wire

No

Yes

No

OK

Confirm unit no display and no sound  on AC power, LED indicator is OK

AC Input Unit can’t display and no sound

                         

Check speaker wire properly connect

Check all connector (CN202,CN302,CN303,CN6,CN1)  properly connect

Exchange fuse or transformer

Yes

properly connect speaker wire

Check VR301

OK

Check IC601 pin 1power supply voltage=12V

No

Yes

Exchange power PWB ass’y (4-0DC011-U-PAPW)

Exchange control PWB ass’y (4-0DC011-U-PAFR)

7. Battery pack input,unit can’t display and no sound 

NO

Check IC601 pin 1power supply voltage=12V

Exchange the volume PWB ass’y (4-0DC011-U-PAVOL)

OK

NG

Check VR301

Properly connect all wire

Properly connect speaker wire

No

Yes

No

Yes

Battery pack input unit can’t  display and no sound

Confirm unit no display and no sound on battery pack LED indicator is OK

Check all connector (CN202,CN302,CN303,CN6,CN1)  properly connect

Check speaker wire properly connect

Yes

Exchange power PWB ass’y (4-0DC011-U-PAPW)

Exchange control PWB ass’y (4-0DC011-U-PAFR)

8. Unit can’t charge and charging indicator fast blink

Confirm battery contact is OK and contact is good when inserted battery pack

Charge LED off

Fast blink

Unit can’t charge and charging indicator fast blink

Confirm FM/AM/AUX function OK, only charging function is NG

NG

Yes

Yes

No

NG

Charge after battery
Pack temperature is low

Exchange contact PWB ass’y (4-0DC011-U-PACONNECT)

OK

Exchange new charger

Exchange power PWB ass’y (4-0DC011-U-PAPW)

OK

NG

OK

Confirm relay K1 and K2

No

Adjust voltage to approach standard value

Yes

NO

Confirm AC voltage is too
High or too low

Confirm battery pack is too heat to charge