Toshiba D-VR41KF Service Manual page 38

"F"
Is the audio signal supplied to Pin(4,50) of IC451?
Is the 5V voltage supplied to Pin(16,32,35,36,46,55) of
IC451, or the 9V voltage supplied to Pin(69) of IC451?
Is the serial data and the clock signal supplied to
Pin(37,38) of IC451?
Is the "L" pulse inputted into the Pin(53) of IC451?
Is the audio signal outputted to Pin(74,76)
of IC451?
Is the audio signal inputted into Pin(2,12) of
IC1508?
Is the audio signal outputted to Pin(14,15) of
IC1508?
Is the audio signal inputted into Pin(6,12) of
IC1518?
Are the audio signals outputted to each pin
of IC1518?
IC1518 21,25PIN AUDIO-OUT 1 (AV1)
IC1518 22,26PIN AUDIO-OUT 2 (AV2)
Are the audio signals outputted to the specific
output terminal?
Are the audio signals outputted to the audio
terminal (JK1502)?
Are the audio signals outputted to the audio
terminal (JK2001)?
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Check the line between Pin(3,13) of IC1501 and
Pin(4,50) of IC451, and service it if defective.
No
Check the circuit of AL+5V, P-ON+5V and
P-ON+9V, and service it if defective.
No
Check the line between Pin(37,38) of IC451 and
Pin(71,72) of IC501, and service it if defective.
No
Check the line between Pin(53) of IC451 and
Pin(28) of IC501, and service it if defective.
No
Replace IC451.
No
Check the line between Pin(74,76) of IC451 and
Pin(2,12) of IC1508, and service it if defective.
No Is approximately 5V voltage supplied to Pin(16)
of IC1508, or approximately -5V voltage supplied to
Pin(7) of IC1508?
Check the AL+5V line and the AL-5V line, and
service it if defective.
No
Check the line between Pin(14,15) of IC1508 and
Pin(6,12) of IC1518, and service it if defective.
No
Is 12V voltage supplied to Pin(2,4) of IC1518?
Yes
Replace IC1518.
No
Check the line between Pin(21,25) of IC1518 and
audio terminal (JK1502), and service it if defective.
Check the line between Pin(22,26) of IC1518 and
No
audio terminal (JK2001), and service it if defective.
1-10-18
No
No
Check the AL+12V(1) line
and service it if defective.
E9BA1TR