Akai ACL-701 User manual

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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)
Check fuse +12 V output (Yes / No)
Yes No Yes No
Check high
voltage
Surge circuit and
signal manage
circuit
Check IC 37160 29 footsie
+5V (Yes/No)
Check and change Power
polarity diode and power
on
Check Power Jack,
fuse and unit current
more than 1.5 A
Check 1204 front
controll audion
periphery parts Change fuse
Check Power
regularly(Yes/No) Check and change Power
supply parts such as
transformer and every
POWER supply
No
No
No
Yes Yes
Yes
Check and change IC 37160 and
IC 24C08 etc periphery parts
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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
AB2C184 high voltage bag etc
Check high voltage Power supply pipe 1202
E pole +12V (Yes/ No)
Yes No
Check and Change IC5001
and correlative periphery parts
Check and change 1ȍ
resistance

3. Whole light (No picture. No sound. Backlight regular)
Yes
Check Power transformer HD-30534 commutate
voltage output regular(+5Vᇬ+16Vᇬ-16Vᇬ+24V or
0.5V-0.7V NO
0.8V above
No Yes
Check Screen arrange 1
footsie +16V 12 footsie
-16V 29,30,31,32 footsie
+5V regular(Yes/No)
Check
Transformercommutae
diode regular
Check and
change current
Power 3518
Check 3158’5Footsie +12V
regular (Yes/No)
Checkmainboard
3 footsie
complex
inphase
regular
Checking
Power
supply
parts
Check and change
commutate output
loading
Change
parts
Check and
change
3518 and
periphery
parts
Check and
change Power
supply current
Resistance
10˖
Check 3Y26A 48 footsie
complex insphase
regular(Yes/No)
Check and change screen and arrange
16,20 screen scanning to control
circuit parts
Check and change
12101 Resistance
Check 3Y26A 2 footsie complex inphase 4.8V(Yes/No)
Check and change 3Y26A Check IC4011 13 footsie complex insphase regular(Yes/No)
Check and change 13 footsie buck
parts
Check ICM61260 11 footse 5 footsie ,in phase
signal output (Yes/ No)
Check and change
IC 4011
Check ICM61260 12,44 12V 3.4.39.40 footsie 5V(Yes/No)
Check Power supply circuit
Check and change ICM61260
Yes NoYes N oYes
No
No
Yes
Yes N o
Yes N o
Yes N o
Yes N o

4. No sound, picture regular
Using disturb way touch ICLM386 3 footsie has
souffle (Yes /No)
Yes N o
Check ICLM386 6 footsie power supply
regular(Yes/ No)
Touch IC61260 51 footse souffle(Yes/No)
Check IC61260 53 foots
audio frequency signal
input(Yes/No)
Check and change
resistance 12˖
Check speaker,
Earphone jack
regular ( Yes/No)
Change parts
Check and change
LM386 and periphery
parts
Check and change
C1uf/50V᧨4.7˖᧨
Change IC61260Check and
change output
parts
Check IC61260 4 foots +5V,
50 foots ,52 foots 3.4V
regular(Yes/No)
No Yes
Yes N o
Check IC 61260 51
foots and correlative
periphery
Parts ,resistance 10K
capacitance etc No Yes
No Yes
No Yes