SERVICE MANUAL
MODEL
COMMANDER
DEST. CHASSIS NO.
MODEL
COMMANDER
DEST. CHASSIS NO.
MICROFILM
Please file according to model size. .......
FDL-252T
US
2.5
LCD COLOR TV
2
FDL-252T
SPECIFICATIONS
TABLE OF CONTENTS
Section
Title
Page
1. GENERAL
Power Sources (see fig. A) ...................................................... 3
Operation (see fig. B) .............................................................. 3
External Antenna Connection (see fig. C) ............................... 4
Using with Video Equipment (see fig. D) ............................... 4
WARNING .............................................................................. 4
2. DISASSEMBLY
2-1.
Case,A board and H board Removal ............................ 5
2-2.
LCD Case and B board Removal ................................. 5
2-3.
Service Position ............................................................ 5
3. CIRCUIT ADJUSTMENTS ............................................ 6
4. DIAGRAMS
4-1. Block Diagram (1) ............................................................ 9
4-2. Block Diagram (2) .......................................................... 11
4-3. Circuit Boards Location ................................................. 13
4-4. Printed Wiring Boards and Schematic Diagrams ........... 13
· A Board ....................................................................... 14
· B Board ....................................................................... 18
· H Board ....................................................................... 21
4-5. Semiconductors .............................................................. 22
5. EXPLODED VIEWS
5-1. Chassis Section .............................................................. 23
6. ELECTRICAL PARTS LIST ........................................ 24
(CAUTION)
SHORT CIRCUIT THE ANODE OF THE PICTURE TUBE AND THE AN-
ODE CAP TO THE METAL CHASSIS, CRT SHIELD, OR CARBON PAINT-
ED ON THE CRT, AFTER REMOVING THE ANODE.
WARNING!!
AN ISOLATION TRANSFORMER SHOULD BE USED DURING ANY SER-
VICE TO AVOID POSSIBLE SHOCK HAZARD, BECAUSE OF LIVE CHAS-
SIS.
THE CHASSIS OF THIS RECElVER IS DIRECTLY CONNECTED TO THE
AC POWER LINE.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY SHADING AND MARK
! ON THE SCHE-
MATIC DIAGRAMS, EXPLODED VIEWS AND IN THE PARTS LIST ARE
CRITICAL TO SAFE OPERATION. REPLACE THESECOMPONENTS
WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN
THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. CIRCUIT
ADJUSTMENTS THAT ARE CRITICAL TO SAFEOPERATION ARE IDEN-
TIFIED IN THIS MANUAL. FOLLOW THESE PROCEDURES WHENEV-
ER CRITICAL COMPONENTS ARE REPLACED OR IMPROPER OPERA-
TION IS SUSPECTED.
3
SECTION 1
GENERAL
The operating instructions mentioned here are partial abstracts from the
Operating Instructions Manual. The page numbers of the Operating
Instruction Manual remain as in the manual. (Par t no : 4-083-375-11)
4
5
FDL-252T
SECTION 2
DISASSEMBLY
2-1. CASE, A BOARD AND H BOARD REMOVAL
2-2. LCD CASE AND B BOARD REMOVAL
2-3. SERVICE POSITION
2 Two screws
(+PTP 2x8)
5 A board
6 H board
1 Battery cover
7 Battery case (upper)
2 Hinge collar
3 LCD case (upper)
4 LCD holder
5 B board
Battery case (lower)
Antenna
B board
Cord
AC power adaptor
CN301
CN401
CN201
J101
J601
A board
H board
3 Screw
(+PTPWH 2)
1 screw
(+PTP 2x8)
4 Remove
solder
lead wire (BLK)
lead wire (RED)