A method is provided for selectively using a PCIXCAP pin input to detect PCIPCI-X bus mode or as DC pin input. The assembly method includes steps for inserting the lens section into the arrangement space portion from the side opening portion, fitting the inserted lens section in the front opening portion, and fitting the image pickup section in the rear opening portion from a rear of the rear opening portion. The preferred embodiment connects, in seriatim, a pipe T junction with a pressure relief valve, a pipe bell reducer, a pipe extension, and an access control valve. A pair of resin sealings 4 are provided between the upper resin chip 53 and the coated electric wires W1 and W2 and between the lower resin chip 55 and the coated electric wires W1 and W2. The CCD image sensor can be configured to operate in two or more operating modes, including a full resolution charge multiplication mode.