Lamp Cover/Plug Error (3X) - Sony KDS-R50XBR1 Training Manual

Diagnostics and troubleshooting

Hide thumbs Also See for KDS-R50XBR1:

Service manual (300 pages)

Operating instructions manual (120 pages)

Quick setup manual (2 pages)

Table Of Contents

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Table of Contents

Clear unit ventilation areas

and and confirm adequate

local room temperature

Check the following items:

•

The TV should not be located too close any heating elements.

•

The TV should be at least 4 inches from all walls and enclosures

to ensure adequate ventilation.

•

Check the vented areas on the lower rear back cover and the

two rear exhaust fan's are clear of all dust and debris.

If all ventilation areas and fans are clear and the TV still shutsdown (2X)

then the next step is to determine if one of the LM75 temperature detection

IC's on the S1, S2, or C boards have failed. It is a process of elimination

to determine which LM75 has failure.

As the ﬂowchart illustrate start with the least expensive boards and work

your way up.

Substitute new or known good boards in the following order.

Replace

S1 & S2 Boards

(S1) A-1123-098-A

(S2) A-1123-099-A

1) S1-Board

2) S2-Board

NOTE: The S2-Board is mounted in difﬁcult-to-get-to spot. Therefore,

the best way to substitute for the board, with very little disassembly,

is to have a extra wire harness (between S-Board and Main Wire

Harness) to connect the substitute board at the interconnect jack.

TVP-21

Replace

Optical Block

50" A-1148-155-A

60" A-1127-174-A

3) Optical Block (C-Board)

If the TV still shuts down (2X) after the previous substitutions then there

is a problem with the DE microprocessor, consequently, the ASU/DSU

assembly must be replaced.

ASU/DSU Assembly