Sharp GX20 Service Manual - Page 67

14. Strobe light does not light up. CONFIDENTIAL GX20 Execute the AT command (STROBOR1, STROBOG1and STROBOB1) and then check which color does not light up among Red, Green and Blue. Which color does not light up? Red only Blue, green or three colors Voltage of 4.35 V ± 0.75 V output at TP405? YES NO Voltage of VBAT_AP applied to IC402 4, 46 pin? YES NO Apparance, mounting and continuity properly given to FS402 NO (Fuse)? YES 3 V output at IC406 4 pin? NO YES Does the camera normally function? YES NO Defective control signal line between IC402 to IC403 defective. Or IC402, IC403 defective. J Parts of Relay FPC_A and CN201 defective or soldering defective or CN201 5 pin connection defective. YES Voltage of 4.35 V ± 0.75 V output at CN201 5 pin? NO Defective connection between Q201 5 pin to TP405. Q401, L402, D404 and R404 defective, or defective mounting. Defective mounting or blowout of FS402. IC406 and peripheral circuit defective or defective mounting. IC402 defective. J Does it light up with the AT command (STROBOR2)? NO Voltage of VBAT_AP applied to CN201 2 pin? NO Parts of Relay FPC_A and CN201 defective or soldering defective or CN201 2 pin connection defective. YES Defective connection between CN201 4 pin to IC402 10 pin. Or IC402 defective. YES Parts of Relay FPC_A and CN201 defective or soldering defective or CN201 4 pin connection defective. 2 - 61