About This Manual; Safety Precaution; The Firmware Update Procedure - BenQ DV M21 Service Manual

1. About this manual
This service manual contains information for maintenance and
service of DV M21; high definition camcorder. The manual might
guide & help you to do the system diagnostics, Firm/Ware update
and the product troubleshooting.
2. Safety precaution
2.1 This product contains High Voltage circuit might hurts service
people whom without electronic knowledge or inadequate
training.
2.2 Warning to a Cardiac, for your healthy & avoid dangerous high
voltage electric shock, we strongly suggest you do not try to
opening & servicing this product.
2.3 Be sure to discharge the High Voltage storage energy prior to
disassembly the enclosure.
i.e. remove entirely power sources (Li‐ion battery, AA battery &
USB port) & wait 30 minutes for circuitry self discharge.
3. The firmware update procedure
3.1 Install the update tool, ("DU, Direct USB") in your computer.
3.2. Launch "DU" utility, then the dialogue box will appear as
below.
2