Mitsubishi Electronics WS-55513 manual PCB & Major Component Locations, Convergence IC Replacement

PCB-DTV Tuner	DM	PCB-MLINK	PCB-Terminal	PCB-Signal
IR Learning	NetCommand	DVI Decoder	A/V Inputs	Control uPC
DM Interface	IEEE1394	RS-232C Interface	A/V Selection	Tuning
DTV Tuner	Card Viewer		3D-Y/C	VCJ
& Demodulator	OSD-Menus		NTSC Video	Convergence
Interface	Digital uPC Control		Decoders	Generator

PCB-Doubler	PCB-SVM		PCB-Power	PCB-Main	PCB-DBF
PIP-POP	Scan Velocity		Power Supplies	Horizontal Defl.	Dynamic
Picture Format	Modulation		Audio Amp.	Vertical Defl.	Beam
3:2 Pull Down	(Picture Edge		Convergence Amps.	High Voltage	Forming
Line Double	Enhancement)				(Corner Focus)
480i to 480p
		Table	1-1: PCB Functions

PCB & Major Component Locations

PCB and major component locations are shown in Figures 1-4 and 1-5.The major circuit functions performed on each PCB is listed in Table 1-1.

Convergence IC Replacement

To maximize cooling efficiency, the Convergence Amplifier ICs, IC8C01 & IC8C02, are mounted as close to the back cover vents as possible. With the heat sink fins over the top of the IC, access for re- placement is restricted. To simplify replacement use the following procedure to remove the heat sink.

1)Release the 2 spring clips from the rear (towards the front of the set) of the heat sink.

2)Remove the 3 mounting screws shown in Figure 1-6.

3)Remove the heat sink by gently prying the IC’s loose.

When reinstalling, please note:

•Overtightening the screws can strip the plastic threads in the chassis.

•Mounting clips should be firmly seated for proper heat transfer.

Figure 1-6: Convergence IC Removal

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