Pioneer PRO-507PU Service Manual - Page 32

1 2 3 4 • Fundamental operation failure A "Home Media Gallery" does not work at all! Doesn't "Home Media Gallery" on "HOME MENU" become selectable after power-on? No There may be something defective in the product. Note: It takes a short while to start "Home Media Gallery" function. Please wait for about 40 seconds until "Home Media Gallery" turns selectable. Check each wire connection with the MAIN ass'y. [HN1]CN7851[M14]CN4017 [HN2]CN7901[M15]CN4016 Isn't there any failure? Note: The wire ass'y between CN7901 and CN4016 has only three wires, though 4pin connector is used. No B Check the power supply for HNM ass'y. Check the UART communication Note: Is there +5V voltage on 1st pin in between HNM ass'y and MAIN ass'y. After completing the self-initializing, CN7901 of HNM side and on 1st pin in CN4016 of MAIN side? yes Almost 35 seconds after power-on, is HNM ass'y notice it to MAIN ass'y by any pulse signal observed on 2nd pin in using RXD_DLNA. CN7851: RXD_DLNA? No To make analysis, remove the wire No yes ass'y between CN7901 and CN4016. Then, check the voltage in MAIN side yes again. Is +5V still not there? No There may be something defective in MAIN ass'y. There may be something defective in HNM ass'y. Replace the HNM ass'y with another one. There may be something defective in MAIN ass'y. Check the UART path in MAIN ass'y. Check the FET transistor switch in MAIN ass'y for HNM power supply. C That is Q4102 and the parts around it. D 32 PRO-507PU 1 2 3 4