Akai AC-L701 Schematic

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AKAI ACL-701 servicing map

1. No picture. No sound. Backlight not light.

Power on to check Power supply audion B 1204 E pole +12V(Yes/No)

Yes No

Press Power to check C pole 12V output(Yes /

No)

Yes No Yes No

Check high
voltage
Surge circuit and
signal manage
circuit

Check 1204 front
controll audion
periphery parts Change fuse

Check IC 37160 29 footsie
+5V (Yes/No)

Yes

Check and change Power
polarity diode and power
on

No

Check Power

regularly(Yes/No)

Check fuse +12 V output (Yes / No)

Check Power Jack,
fuse and unit current
more than 1.5 A

Yes

Check and change Power

supply parts such as

transformer and every

POWER supply

No

Yes

Check and change IC 37160 and
IC 24C08 etc periphery parts

No

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2 Backlight not light. Picture regular

Check high voltage surge circuit Power supply pipe
1202 C pole 12V(Yes/ No)

Yes No

Check and change high voltage surge audion

AB2C

high voltage bag etc

184

Check and Change IC5001
and correlative periphery parts

Check high voltage Power supply pipe 1202
E pole +12V (Yes/ No)

Yes No

Check and change 1ȍ

resistance

3. Whole light (No picture. No sound. Backlight regular)

Check Power transformer HD-30534 commutate

voltage output regular(+5Vᇬ+16Vᇬ-16Vᇬ+24V or

Ye s

0.5V-0.7V NO

Check Screen arrange 1
footsie +16V 12 footsie

-16V 29,30,31,32 footsie
+5V regular(Yes/No)

Yes NoYes NoYe s

Checkmainboard

3 footsie
complex
inphase

No

Checking
Power
supply
parts

Check
Transformercommutae
diode regular

Check and change
commutate output
loading

regular

No Yes

Check 3Y26A 48 footsie
complex insphase
regular(Yes/No)

Yes

Check and change screen and arrange
16,20 screen scanning to control
circuit parts

No

0.8V above

Check and
change current
Power 3518

Change
parts

Check and
change
3518 and
periphery
parts

Check 3158’5Footsie +12V
regular (Yes/No)

Check and
change Power
supply current
Resistance

10˖

Check and change
12101 Resistance

Check and change 3Y26A

Check and change 13 footsie buck
parts

Check and change
IC 4011

Check 3Y26A 2 footsie complex inphase 4.8V(Yes/No)

Yes No

Check IC4011 13 footsie complex insphase regular(Yes/No)

Yes No

Check ICM61260 11 footse 5 footsie ,in phase
signal output (Yes/ No)

Yes No

Check ICM61260 12,44 12V 3.4.39.40 footsie 5V(Yes/No)

Yes No

Check Power supply circuit

Check and change ICM61260

4. No sound, picture regular

Using disturb way touch ICLM386 3 footsie has

souffle (Yes /No)

Yes No

Touch IC61260 51 footse souffle(Yes/No)

Yes No

Check IC61260 53 foots
audio frequency signal
input(Yes/No)

No

Check and change

Ye s

Check IC61260 4 foots +5V,
50 foots ,52 foots 3.4V

C

/50V᧨4.7˖᧨

1uf

regular(Yes/No)

Check IC 61260 51
foots and correlative
periphery
Parts ,resistance 10K
capacitance etc

Check ICLM386 6 footsie power supply
regular(Yes/ No)

No Yes

Check and change

resistance 12˖

Change parts

Check speaker,
Earphone jack
regular ( Yes/No)

No Yes

Check and change
LM386 and periphery
parts

No Yes

change output
parts

Change IC61260 Check and