FDL-250T - Sony TV Service Manual (repair manual). Page 2

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American TV standard/NTSC

VHF : 2-13
UHF : 14-69

VHF/UHF strap antenna

Transmissive type TN liquid cryatal
panel

TFT/active matrix

2.5 inches measured diagonally

49 x 36.5mm (1

7

/8 x 1 

7

/16   in.)(wh)

Audio/video : minijack
  Audio : 500mVrms, 47k

Ω

  Video : 1 Vp-p, 75-ohms, unbalanced,
               sync negative
Antenna : VHF/UHF  75

Ω

 (minijack)

Headphones : minijack (mono)
Impedance  8-45 ohms

4.5 V DC
AC power adaptor compatible (not
supplied)

Approx. 2.8W

Ø28mm (1 

1

/

8

 in.), 0.1W

32˚F-104˚F (0˚C-40˚C)

Closed : Approx. 90 x 109 x 71.7mm
(3 

9

/

16

 x 4 

5

/

16

 x 2 

13

/

16

 in.)(w/h/d)

Fully opened :
     Approx. 90 x 194 x 71.7mm
     (3 

9

/

16

 x 7 

3

/

4

 x 2 

13

/

16

 in.)(w/h/d)

                                             excl. projecting parts and controls

Approx. 1,300mm (51 

1

/

4 

 in.)

Approx. 360g (12.7oz), excl. batteries

Strap adjuster
This instruction manual
Warranty
Customer Inquiry Card
Important Safeguards

AC power adaptor AC-E45HG
Size AA (LR6) alkaline batteries

Design and specifications are subject to change without notice.

Section

Title

Page

Power Sources (see fig. A) ...................................................... 3
Operation (see fig. B) .............................................................. 3
External Antenna Connection (see fig. C) ............................... 3
Using with Video Equipment (see fig. D) ............................... 4
Precsutions .............................................................................. 4
Troubleshooting ...................................................................... 4
WARNING .............................................................................. 4

2-1.

Case,A board and H board Removal ............................ 5

2-2.

LCD Case and B board Removal ................................. 5

2-3.

Service Position ............................................................ 5

............................................ 6

4-1. Block diagram .................................................................. 8
4-2. Circuit Boards Location ................................................. 11
4-3. Printed Wiring Boards and Schematic Diagrams ........... 11

• A  Board ....................................................................... 12
• B  Board ....................................................................... 16
• H  Board ....................................................................... 20

4-4. Semiconductors .............................................................. 21

5-1. Chassis Section .............................................................. 22

........................................ 23

(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.