Sony TVP0458 free download

File name TVP0458.pdf

CONFIDENTIAL CSV-1 Sony Service Company National Technical Services Service Bulletin A Division of Sony Electronics Inc. Park Ridge, New Jersey 07656 TV Products Model: VPL-W400Q No. 458 Subject: Firmware-Special ROM For Lamp Timer Reset Date: January 28, 2000 Symptom: (177X) The projector will not operate if the Status is set to OFF, and the following message appears: Please replace the Lamp. Possible damage with continued use! Even if the lamp is replaced, the lamp TIMER RESET command will be invalid, and power on may fail. Solution: A special ROM is now available to reset the lamp timer regardless of the STATUS ON/OFF state. The lamp timer is reset to 0h. (The value is not copied into the previous lamp timer.) To use this special ROM, perform the following procedure. Parts Required: Description Part Number Lamp Timer Reset VW400QLTR IC M27C512 (Check sum 061D) Procedure -Using The Special ROM: 1. Turn OFF the main power switch. 2. Remove the Main ROM (IC5205) from its socket, and insert the special ROM into socket. CAUTION: Programmable devices are easily damaged by static electricity. Make sure the equipment is powered OFF and you are grounded to the unit with a cable that contains a 1 Meg Ohm resistor between you and ground when installing programmable devices. Work with caution when grounded to the unit. 3. Turn ON the Main power switch. 4. Leave the projector in STANDBY mode for at least 10 seconds. 5. Turn OFF the Main power switch. 6. Remove the special ROM, and install the main ROM back into its socket. 7. Turn ON the Main power switch. Note: Power ON will fail if the special ROM is left in the Main ROM socket. Reference: SB B&P 1999-216 PRINTED IN USA