Sony SAT-B55 RM-Y139 - Manual (Page 12)

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SAT-A55/B55
SECTION 2
DISASSEMBLY
2-2. HB BOARD REMOVAL
2-3. A, SC BOARD REMOVAL
Three Screws
(BVTT 3 x 8)
Upper Case
Two Screws
(BVTT 3 x 6)
Control Button
Four Claws
HB Board
Power Button
Front Panel
2-1. UPPER CASE REMOVAL
Washer Hexagon Nut
SC Board
A Board
Six Screws
(BVTT 3 x 6)
One Screw
(BVTT 3 x 6)
Two Screws
(BVTT 3 x 8)
Two Hexagon Screws
One Screw
(BVTT 3 x 6)
One Screw
(BVTT 3 x 6)
Two Screws
(BVTT 3 x 6)
Use the following procedure to run the service test:
1. Turn power on.
2. Enter Service Test screen by simultaneously pressing the menu button and the down arrow button on the front panel of the unit.
3. Select the TEST button on the Service Test screen. The test will diagnose and identify the following:
IRD
DEMOD TYPE
DEMOD SIGNAL
AV7100
RAM TEST
ROM
TELCO
VERIFIER, CAM
ACCESS CARD
CHECKSUM
EEPROM
4. To reset the unit, simultaneously press the guide button and the down arrow down button on the front panel of the unit.
SECTION 3
SERVICE TEST