Sanyo Sanyo DP50749 P50749-02 J4FH [SM] free download

File name Sanyo_DP50749_P50749-02_J4FH_[SM].pdf

SANYO: DP50749-02 & DP50719-00 12/28/10 with PANASONIC 50" PLASMA PANEL (MD50H12NBC) p#1 SYMPTOM: TV's GREEN POWER LED WILL NOT REMAIN ON 2009-9B note: Unplugging any power cable from the SMPS to isolate the defective PCB will not work on this Panasonic panel. Unplugging any of the power cables will cause the SMPS to shut down. a) Unplug LVDS Cable (40 pin connector) from Main to Digital "D" Bd. (D5 connector) behind Main: This will eliminate the Main Bd., and see if the SMPS will power ON automatically, and remain ON. Plug the AC Cord to power (do not push the Pwr Key on the TV) and see if the SMPS will power ON. If the SMPS powers ON and remains ON, then the Main Bd. should be tried. If the SMPS continues to shutdown then resistance checks (#1-#12) below should be done. note: This panel has a self test mode, and unplugging the LVDS starts the self test. No raster is displayed, because a special jig is needed to activate the raster & video. b) If the Base has ever been removed from the TV, the metal leg could have cut the Flat Ribbon and PCB underneath the leg. Please see page #4. RESISTANCE CHECKS TO POSSIBLY ISOLATE DEFECTIVE PCB Location of connectors is 1) Is pin #1 or #2 (60V) of (P35 connector) shorted to chassis Gnd? on page #2 yes, shorted = PDP Panel N/G not shorted = go to step #2 Please re-install all PCB mounting 2) Is Pin #5 or #6 (5V) of (P25 connector) shorted to chassis Gnd? screws whenever a board is yes, shorted = go to step #3 changed, and before re-testing not shorted = go to step #4 the TV. The ground screws are 3) Disconnect (p25 connector) needed to prevent damage to the Is Pin #5 or #6 (5V) of (P25 connector) shorted to chassis Gnd? PCB. yes, shorted = SMPS N/G not shorted = go to step #4 After working on TV, if it has 4) Disconnect (SC20 connector) several horizontal lines or bars, Is pin #30 (5V) of SC20 connector shorted to chassis Gnd? please try reseating the flat yes, shorted = SC Bd N/G ribbons going to the SU & SD Bds. not shorted = go to step #5 5) Disconnect (SS23 connector) Is pin #1 (5V) o