Sharp VL-A110U Service Manual page 36

VL-A110U/UC
VL-AH130U
6-5-2. Troubleshooting for the camera section
No picture
No color
No auto white balance function
No auto focus function
No power zoom function
6-5-3. Charging mode troubles
Start
Is ADP-DET "H"? *1
"L"
Is CHG-ON "L" or "H"? *2
"H"
Is BAT DET "OV" ?
NO
Is BAT DET CK voltage more
than 2.8V or less than 5.9V.
YES
Is the output voltage of Q2901,
1pin more than 7V.
YES
Is Q2905 collect voltage
indicating.
more than 3V
Check the D2913 ,
R2921~R2923 and CP901.
*1: Inputting DC power and set the ADP DET "L".
*2: Inputting charging mode as CHG ON "H".
Normal
"H"
Check the circuit of SYSCON.
"L"
Check the circuit of SYSCON.
YES
Check Q2911, R2914, R2915
and battery terminal unit.
NO
Battery is defective.
NO
Check the AC adapter.
Check Q2905, IC2901 and around the circuits.
less than 3V
û
Check the lens drive circuit (IC551) and main signal
YES
line.
û
Check IC401 (DSP), and their peripherals.
YES
û
YES Check IC706 (System/Servo Control), IC551 (Lens
driver) and its peripherals.
û
Check IC706 (System/Servo Control), IC551 (Lens
YES
driver) and their peripherals.
û
YES Check IC706 (System/Servo Control), IC551 (Lens
driver) and their peripherals.
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