5-1 Trouble shooting Chart
No +18V output
Is the F501
(Fuse3.15A) normal?
Yes
No
Is the D533/D534
normal
Yes
Yes
Yes
No
Replace the U531
Replace the
D538/D539/D540/D541
Replace the F501(Use the
same ICW)
No
Is the U531
(TOP258EN) normal
No +18V output
Is the D531 D532
U533 normal
Yes
Replace the D531 D532 U533
No
Is there about 15V at
the U532 Pin3.4?
l
Replace the U532
Power line of Audio PCB is short
Yes
No
Summary of Contents for HTL4111B/12
Page 43: ...USB MP3 board Print Layout bottom and top side 7 14 7 14 ...
Page 44: ...Front Control and Key board Print Layout bottom side 7 15 7 15 ...
Page 45: ...Front Control and Key board Print Layout Top side 7 16 7 16 ...
Page 46: ...Power board Print Layout Bottom side 7 17 7 17 ...
Page 47: ...Main board Print Layout Bottom side 7 18 7 18 ...
Page 48: ...Main board Print Layout Top side 7 19 7 19 ...