Sharp VL-H870U Service Manual page 41

VL-H870U
VL-H875U
VL-H890U
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
"L"
Is BAT DET "OV" ?
NO
Is BAT DET CK voltage more
than 4V or less than 8.4V.
YES
Is the output voltage of Q2901,
1pin more than 9V.
YES
Is Q2905 collect voltage
indicating.
more than 4V
Check the D2904, R2906,
R2933, R2921~R2923 and
CP901.
*1: Inputting DC power and set the ADP DET "L".
*2: Inputting charging mode as CHG ON "L".
Normal
"H"
Check the circuit of SYSCON.
"H"
Check the circuit of SYSCON.
YES
Check Q2911, R2927, R2928, R2914, R2915
and battery terminal unit.
NO
Battery is defective.
NO
Check the AC adapter.
Check Q2905, IC2901 and around the circuits.
less than 4V
û
YES Check the lens drive circuit (IC551) and main signal
line.
û
Check IC201 (DSP), and their peripherals.
YES
û
YES Check IC501 (camera CPU) and its peripherals.
û
Check IC501, IC551 and their peripherals.
YES
û
YES Check IC501, IC551 and their peripherals.
6-17
VL-H870U
VL-H875U
VL-H890U