49
VC-A582U
VC-A582U(A)
VC-H982U
Linear audio playback is impossible. (Hi-Fi E-E mode is normal).
Are MH-AA harness and playback AMP. peripheral parts normal?
Is the AC head surface clean?
Is AC head height adjusted properly?
Replace the AC head.
Readjust the A/C head height.
Is audio signal output to the IC201 pin 11?
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
Is it possible to confirm the audio signal (PB EQ)
on the IC201 pin 100?
Replace IC201.
Check the AUDIO MUTE (H) line from the
IC201 pin 99 to the IC701 pin 21.
Is the IC201 pin 99 in "L" level?
Check the line between the IC201 pin 11 to the
IC651 pin 54.
FLOW CHART NO.27
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
FLOW CHART NO.28 LINEAR SOUND E-E MODE TROUBLESHOOTING
No E-E signal
Is there a signal at pins (8)
and (9) of IC201?
Check parts around the audio inputs jack,
and circuits around the audio output
circuit in tuner (TU101).
Is the supply voltage of 5V
feed to pin (96) of IC201?
Check PC 5V line.
Are there the serial data and
clock signal at pins (63) and
(62) of IC201?
Check between pins (63) and (62) of
IC201 and all the way thru to pins (56) and
(57) of IC701.
Is there a signal at pin (11) of
IC201?
Is there "L" level at pin (99) of IC201?
Check A-MUTE (H) line.
Replace IC201.
Check between pin (11) of IC201 and all the way up thru to audio output jack
and that between pin (2) of tuner (TU101).
NO
NO
YES
YES
YES
YES
FLOW CHART NO.29 LINEAR SOUND RECORDING MODE TROUBLESHOOTING
No record.
Is there a signal at pin (4) of
IC201?
Is the operate of IC601 normally?
NO
Is there a signal (Bias) at pin (6) of
T601?
Check T601, Q602, Q603, Q604
and their peripheral parts.
NO
Is there a signal (Bias+Audio sig.)
at T601.
Check MH-AA harness and A/C
head.
Replace IC201.
Is there "H" level at pin (2) of T601?
Check AT 12V line.
FLOW CHART NO.30 LINEAR SOUND PLAYBACK MODE TROUBLESHOOTING
No playback.
Is there a signal at pin (100) of IC201?
Replace defective parts.
Are the MH-AA harness and the PB
AMP's peripheral parts normal?
Clean A/C head.
Is azimuth height of the A/C head
properly adjusted?
Readjust azimuth height.
Replace A/C head.
Is there "L"level at pin (99) of IC201?
Check AUDIO MUTE (H) line.
Is there a signal at pin (11) of IC201?
Replace IC201.
Check line between pin (11) of IC201 and the audio output jack, and that between pin (2) of
tuner (TU101).
NO
NO
NO
YES
NO
NO
YES
YES
YES
YES
YES
Summary of Contents for VC-A582U
Page 50: ...50 VC A582U VC A582U A VC H982U ...
