Read Sharp DV-NC55 (serv.man10) Service Manual online
54
DV-NC55S/H
DV-NC60H
DV-NC60H
FLOW CHART NO.22 LINEAR SOUND MODE TROUBLESHOOTING(3) (For Hi-Fi and MONO model)
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
Is there audio signal inputted at pin(54) of IC6301?
Is there "L" level at pin (99) of IC201.
Is there signal at pin (100) of IC201?
Are there signal at pin (1) of IC681?
Re-adjust azimuth.
YES
YES
YES
Is there signal at pin (11) of IC201.
Are there MH-AA harness and the PB AMP
peripheral parts normal?
Replace IC201.
Clean A/C head.
Replace A/C head.
Replace IC201.
Check line between pin (11) of IC201 and pin (54)
of IC6301.
Is the azimuth height of A/C head properly
adjusted?
YES
Check the AUDIO MUTE (H) line between pin (99)
of IC201 and pin (21) of IC701.
PAL EP ONLY
Hi-Fi model ONLY
No linear sound playback (E-E mode is possible)
FLOW CHART NO.21 LINEAR SOUND MODE TROUBLESHOOTING(2) (For Hi-Fi and MONO model)
NO
NO
YES
Is "L" level applied at pin (99) of IC201?
Is there signal at pin (4) of IC201?
Is the supply voltage of 12V fed to pin (2) of T651?
Check the AUDIO MUTE (H) line between pin (99)
of IC201 and pin (21) of IC701.
Replace IC201.
Check M 12V line.
Check peripheral circuits of T651.
Is there signal (Bias + Audio sig) at pin (6) of T651?
Check the MH-AA harness and A/C head.
Is there signal (Bias) at pin (5) of T651?
Check the Bias oscillation circuit (T651, Q651,
Q652) and A-ERASE CTL line.
YES
YES
YES
YES
NO
NO
NO
No linear sound recording (E-E mode is possible)
FLOW CHART NO.23 NICAM/IGR TROUBLESHOOTING (For Hi-Fi model)
NO
NO
NO
YES
NO
NO
Is there a base band signal at SIF
OUT of TU1401?
Is there a base band signal at pin
(2) of IC1701?
Check peripheral circuit of X1701.
Is there a NICAM/IGR audio signal
at pin (15), (16) of IC2501?
Is there a NICAM/IGR audio signal
at pins(31), (30) of IC1701?
Check line between pin (39), (40)
of IC2501 and pins(52), (61) of
IC6301.
See Flow Chart No. 17 Hi-Fi
SOUND MODE
TROUBLESHOOTING (1)
For Hi-Fi model
NO
YES
YES
YES
YES
NO
NO
YES
YES
YES
YES
YES
Check peripheral circuit of
TU1401.
Check between SIF OUT of
TU1401 and pin(2) of IC1701.
Check PC5V line.
Check the REG. circuit of D9912.
Check PC Motor 12V line.
Check peripheral circuit of IC1701.
Replace IC1701.
Is MPX 8V supplied at pin (33) of
IC1701?
Is 5V supplied at pins (11), (19),
(1) of IC1701?
Check serial data and clock at pin
(12) and (13) of IC1701.
Check between IIC Data pins(26),
(27) of IC701 and pins(12),(13)
of IC1701.
Is there oscillated 18.432MHz at
pins(5), (6) of IC1701?
No NICAM/IGR
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