Sinus Live SL A - 1500 wont power up

[mekaiver]

Hi, i already searched and found some threads about that amp , but non were with the same problem that mine is. Since its a D-class amp, its a bit of an headache to me. When appling remote B+ and GND it wont do nothing, it wont draw any amps. I measured that the power reaches the board, i mean the connectors are correctly soldered to the board and thats not the case. What i noticed was that the TL494 dont have the correct values, for example, the 12V VCC is missing, so i soldered it out. Still no correct VCC on the solder pads or without the TL there mustnt be any correct values? Output transistors and the powersupply transistors seem to be okay. Has anyone the schematic or any ideas traceing down the link, that should give the 494 its neccesery voltage.

Sry for my bad english and thanks!

[Perry Babin]

Post the DC voltage on all 16 pins of the 494.

IC#
Pin 1:
Pin 2:
Pin 3:
Pin 4:
Pin 5:
Pin 6:
Pin 7:
Pin 8:
Pin 9:
Pin 10:
Pin 11:
Pin 12:
Pin 13:
Pin 14:
Pin 15:
Pin 16:

[mekaiver]

IC#
Pin 1: 0
Pin 2: 1,38
Pin 3: 0
Pin 4: 0
Pin 5: 0
Pin 6: 0
Pin 7: 0
Pin 8: 2,32
Pin 9: 0
Pin 10: 0
Pin 11: 2,32
Pin 12: 2,32
Pin 13: 0
Pin 14: 0
Pin 15: 0
Pin 16:0

THIS IS MEASURED IC OUT!

[Perry Babin]

Check Q17 and Q18.

Email me.
babin_perry@yahoo.com

[mekaiver]

Q17 seems to be okay but cant locate Q18. Is it on the modu1 board under that black epoxy?