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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 / Check fuse +12 V output (Yes / No)
No)


Yes No Yes No


Check Power Jack,
Check and change Power fuse and unit current
Check high Check IC 37160 29 footsie polarity diode and power more than 1.5 A
voltage +5V (Yes/No) on
Surge circuit and
signal manage
Yes No
circuit Yes
No

Check Power
Check 1204 front regularly(Yes/No) Check and change Power
controll audion supply parts such as
periphery parts transformer and every Change fuse
POWER supply


Yes No


Check and change IC 37160 and
IC 24C08 etc periphery parts
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 Check high voltage Power supply pipe 1202
AB2 C184 high voltage bag etc E pole +12V (Yes/ No)



Yes No



Check and Change IC5001 Check and change 1
and correlative periphery parts resistance
3. Whole light (No picture. No sound. Backlight regular)
Check Power transformer HD-30534 commutate
voltage output regular(+5V +16V -16V +24V or
Yes

0.5V-0.7V 0.8V above NO
Check Screen arrange 1
footsie +16V 12 footsie Check
Check and Check 3158'5Footsie +12V
-16V 29,30,31,32 footsie Transformercommutae
change current regular (Yes/No)
+5V regular(Yes/No) diode regular
Power 3518
Yes No Yes No Yes No


Checkmainboard Checking
Check and change Change Check and Check and
3 footsie Power
commutate output parts change change Power
complex supply
loading 3518 and supply current
inphase parts
periphery Resistance
regular
No Yes parts
10
Check 3Y26A 48 footsie
Check and change screen and arrange
complex insphase
16,20 screen scanning to control
regular(Yes/No)
circuit parts
No
Yes
Check and change Check 3Y26A 2 footsie complex inphase 4.8V(Yes/No)
12101 Resistance
Yes No

Check and change 3Y26A Check IC4011 13 footsie complex insphase regular(Yes/No)
Yes No
Check and change 13 footsie buck Check ICM61260 11 footse 5 footsie ,in phase
parts signal output (Yes/ No)

Yes No

Check ICM61260 12,44 12V 3.4.39.40 footsie 5V(Yes/No)
Check and change
IC 4011
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




Check ICLM386 6 footsie power supply
Touch IC61260 51 footse souffle(Yes/No)
regular(Yes/ No)


No Yes
Yes No




Check IC61260 53 foots
Check and change Check speaker,
audio frequency signal Check IC 61260 51
Earphone jack
input(Yes/No) foots and correlative resistance 12
regular ( Yes/No)
periphery
Parts ,resistance 10K
capacitance etc No Yes
No
Yes




Check and change
Check and change Check IC61260 4 foots +5V,
LM386 and periphery
50 foots ,52 foots 3.4V Change parts
C1uf/50V 4.7 parts
regular(Yes/No)


No Yes




Check and Change IC61260
change output
parts