Samsung SCC-B2335 Service Manual - Page 24

Trouble Shooting 4-1 Trouble Shooting If the product does not turn on Do you connect No the product to the power supply properly? Yes Is there any problem with the No input terminal FUSE (F1) of the camera? Yes D CN2 8 i f Does CN2-8pin of No the power PCB output +9.6v properly? Yes Does CN2-3,4,5,6 of the Power PCB properly No output - 12V 17V 5V 12V, +17V, +5V, and +3.3V, respectively? Refer to a pattern image of Table 4-1 Yes Does the CCD PCB get proper input voltages of +5V, No +3.3V, +15V, and - 12V? Yes Does the CCD PCB properly output +1.2V, +2.5V, +3.3V, +5V, +9V, +15V, No d 8 5V ( 6 8) and -8.5V (-6.8), respectively? Yes Check the camera if it works properly Check if the power supply adaptor is properly connected to the camera and check also the input voltage. Check the rear indicator. Check the POWER PCB FUSE (F1) using DVM and replace it if necessary. Check the POWER PCB for the I/O of the bus line, and replace the PCB if necessary. (Check also the TRANS and bus line) Check if the POWER PCB is properly connected to the CCD PCB, d l d f ti PCB if and replace any defective necessary. (Check U4 for the bus line and if it work properly) Check CN4 of the CCD PCB for the connection. Check the CN4 connector of the CCD BOARD is properly connected to the harness of CN2 of the POWER PCB, and replace it if necessary. Check the voltage of each point below using DVM. -C86+: +1.2V -C87+: +2.5V -C35+: +3.3V -C75+: +3.3V (REG) C39+: +5V --IC20-1pin: +9V -IC2-1pin: +15V -Q2-E: -8.5V(-6.8V) 4-2 Samsung Electronics