Convergence Output Ic Replacement - Mitsubishi Electric WS-48513 Troubleshooting Manual

PCB-DTV Tuner
IR Learning
DM Interface
DTV Tuner
& Demodulator
Interface
PCB-Doubler
PIP-POP
Picture Format
3:2 Pull Down
Line Double
480i to 480p
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.
DM
NetCommand
IEEE1394
Card Viewer
OSD-Menus
Digital uPC Control
PCB-SVM
Scan Velocity
Modulation
(Picture Edge
Enhancement)
Table 1-1: PCB Functions
Figure 1-6: Convergence IC Removal
PCB-MLINK
DVI Decoder
RS-232C Interface
PCB-Power
Power Supplies
Audio Amp.
Convergence Amps. High Voltage
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.
1-5
PCB-Terminal
A/V Inputs Control uPC
A/V Selection Tuning
3D-Y/C VCJ
NTSC Video Convergence
Decoders Generator
PCB-Main
Horizontal Defl. Dynamic
Vertical Defl. Beam
Forming
(Corner Focus)
PCB-Signal
PCB-DBF