Sharp 27DV-S100

68
27DV-S100 27DV-CS10
No recording with linear audio signal.
NO
YES
Check the line between pin (61) of
IC6651 and pin (8) of IC2201.
Is there the audio input signal at pin
(8) of IC2201?
No playback with linear audio signal.
NO
YES
YES
Do the MH-AA harness, playback
amplifier and its peripheral circuits
function?
Is there the audio signal (PB EQ) at
pin (100) of IC2201?
YES
Is the A/C head dirty?
NO
YES
Is the A/C head height optimally
adjusted?
Replace the A/C head.
Readjust the A/C head height.
NO
YES
NO
Is the voltage at pin (99) of IC2201 at
"L" level?
Is there the audio output signal at
pin (11) of IC2201?
Check R6617.
Replace IC2201.
Check the line between pin (11) of
IC2201 and pin (62) of IC6651.
NO
YES
Check R6617.
Is the voltage at pin (99) of IC2201
at "L" level?
NO
YES
Check the bias oscillation circuit
(around T6601 and Q6602).
NO
Check R6623, R6605, R6606 and
C6606.
Does the bias oscillation circuit
function?
YES
Is there the bias signal-
superimposed audio signal at pin (4)
of IC2201?
Check the AA-MH harness and the
A/C head.
FLOW CHART No. 2-19FLOW CHART No. 2-18