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1)  1 Vp-p 75 ohms unbalanced, sync negative 

2)  Y: 1 Vp-p 75 ohms unbalanced, sync negative

 

C: 0.286 Vp-p (Burst signal), 75 ohms

3)  Y: 1.0 Vp-p, 75 ohms, sync negative; PB: 0.7 Vp-p, 75 ohms; 

 

PR Vp-p, 75 ohms.

4) 500 

mVrms (100% modulation), Impedance: 47 kilohms

5)   This specifi cation is the maximum wattage.

Manufactured under license from Dolby 
Laboratories Licensing Corporation. Dolby 
and the double-D symbol are trademarks of 
Dolby Laboratories.

As an ENERGY STAR® Partner, Sony 

Corporation has determined that this 

product meets the ENERGY STAR® 

guidelines for energy efficiency. ENERGY 

STAR® is a U.S. registered mark. 

SRS and the ( )® symbol are trademarks of 

SRS Labs, Inc. 

Manufactured under license from BBE Sound, 

Inc. Licensed by BBE Sound, Inc. under USP 

4638258, 5510752 and 5736897. BBE and BBE 

symbol are registered trademarks of BBE 
Sound, Inc.

WEGA, FD Trinitron and Steady Sound are registered 

trademarks of Sony Corporation.

120V, 60Hz

3

1

2

5

1

1

10W x 2

175W

<1W

768 x 590 x 497 mm

30

1/4

 x 23 

1/4

 x 19

5/8

 in

46.5 kg

102.5 lbs

American TV standard, NTSC
ATSC Compliant 8VSB, ATSC (8VSB terrestrial)
ANSI/SCTE 07 2000; QAM on cable
 (Does not include CableCARD functionality)

Analog: VHF: 2-69/CATV: 1-125
Digital: VHF: 2-69/CATV: 1-135

75-ohm external antenna terminal for VHF/UHF

FD Trinitron

 tube

27-inch picture measured diagonally 

29-inch measured diagonally

Remote Commander RM-YD001 
Two Size AA (R6) Batteries

TV Stand 

SU-27FS2

Short circuit the anode of the picture tube and the anode cap to the metal chassis, CRT shield, or carbon painted on the CRT, after 
removing the anode.

An isolation transformer should be used during any service to avoid possible shock hazard, because of live chassis. The chassis of this 
receiver is directly connected to the AC power line.

!

 SAFETY-RELATED COMPONENT WARNING!!

Components identifi ed by shading and ! mark on the schematic diagrams, exploded views, and in the parts list are critical for safe 
operation. Replace these components with Sony parts whose part numbers appear as shown in this manual or in supplements published 
by Sony.  Circuit adjustments that are critical for safe operation are identifi ed in this manual. Follow these procedures whenever critical 
components are replaced or improper operation is suspected. 

Apres avoir deconnecte le cap de l’anode, court-circuiter l’anode du tube cathodique et celui de l’anode du cap au chassis metallique de 
l’appareil, ou la couche de carbone peinte sur le tube cathodique ou au blindage du tube cathodique.

Afi n d’eviter tout risque d’electrocution provenant d’un chássis sous tension, un transformateur d’isolement doit etre utilisé lors de tout 
dépannage. Le chássis de ce récepteur est directement raccordé à l’alimentation du secteur.

! 

Les composants identifi es par une trame et par une marque ! sur les schemas de principe, les vues explosees et les listes de pieces 
sont d’une importance critique pour la securite du fonctionnement. Ne les remplacer que par des composants Sony dont le numero 
de piece est indique dans le present manuel ou dans des supplements publies par Sony. Les reglages de circuit dont l’importance est 
critique pour la securite du fonctionnement sont identifi es dans le present manuel. Suivre ces procedures lors de chaque remplacement 
de composants critiques, ou lorsqu’un mauvais fonctionnement suspecte.

After correcting the original service problem, perform the following 
safety checks before releasing the set to the customer:

1.  Check the area of your repair for unsoldered or poorly soldered 

connections. Check the entire board surface for solder splashes and 
bridges.

2.  Check the interboard wiring to ensure that no wires are “pinched” or 

touching high-wattage resistors.

3.  Check that all control knobs, shields, covers, ground straps, and 

mounting hardware have been replaced. Be absolutely certain that 
you have replaced all the insulators.

4.  Look for unauthorized replacement parts, particularly transistors, 

that were installed during a previous repair. Point them out to the 
customer and recommend their replacement.

5.  Look for parts which, though functioning, show obvious signs of 

deterioration. Point them out to the customer and recommend their 
replacement.

6.  Check the line cords for cracks and abrasion. Recommend the 

replacement of any such line cord to the customer.

7.  Check the B+ and HV to see if they are specifi ed values. Make sure 

your instruments are accurate; be suspicious of your HV meter if 
sets always have low HV.

8.  Check the antenna terminals, metal trim, “metallized” knobs, 

screws, and all other exposed metal parts for AC leakage. Check 
leakage as described below.

The AC leakage from any exposed metal part to earth ground and from 
all exposed metal parts to any exposed metal part having a return to 
chassis, must not exceed 0.5 mA (500 microamperes). Leakage current 
can be measured by any one of three methods.

1.  A commercial leakage tester, such as the Simpson 229 or RCA 

WT-540A. Follow the manufacturers’ instructions to use these 
instructions.

2.  A battery-operated AC milliampmeter. The Data Precision 245 

digital multimeter is suitable for this job.

3.  Measuring the voltage drop across a resistor by means of a VOM 

or battery-operated AC voltmeter. The “limit” indication is 0.75 V, 
so analog meters must have an accurate low voltage scale. The 
Simpson’s 250 and Sanwa SH-63TRD are examples of passive 
VOMs that are suitable. Nearly all battery-operated digital 
multimeters that have a 2 VAC range are suitable (see Figure A).

How to Find a Good Earth Ground
A cold-water pipe is a guaranteed earth ground; the cover-plate 
retaining screw on most AC outlet boxes is also at earth ground. If the 
retaining screw is to be used as your earth ground, verify that it is at 
ground by measuring the resistance between it and a cold-water pipe 
with an ohmmeter. The reading should be zero ohms.

If a cold-water pipe is not accessible, connect a 60- to 100-watt trouble- 
light (not a neon lamp) between the hot side of the receptacle and the 
retaining screw. Try both slots, if necessary, to locate the hot side on 
the line; the lamp should light at normal brilliance if the screw is at 
ground potential (see Figure B).

To Exposed Metal 

Parts on Set

0.15 µF

1.5 K 

Ω

AC

Voltmeter

(0.75 V)

Earth Ground

Trouble Light

AC Outlet Box

Ohmmeter

Cold-water Pipe

Figure A. Using an AC voltmeter to check AC leakage.

Figure B. Checking for earth ground.

*If a +B overcurrent is detected, stoppage of the vertical defl ection is detected simultaneously.  The symptom that is diagnosed fi rst by the mircrocontroller 
is displayed on the screen.
**Refer to Screen (G2) Adjustments in Section 2-4. of this manual.

 

+B Overcurrent 

 

2 times

 I-Prot 

  4 

times

 IK 

(AKB) 

  5 

times

 

*One fl ash count is not used for self-diagnostic.

Stopping the Standby/Timer LED Flash
Turn off the power switch on the TV main unit or unplug the power cord from the outlet to stop the STANDBY/TIMER LAMP from fl ashing.

The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY/TIMER LED will automatically begin to fl ash. The number of 
times the LED fl ashes translates to a probable source of the problem. A defi nition of the STANDBY/TIMER LED fl ash indicators is listed in the instruction 
manual for the user’s knowledge and reference. If an error symptom cannot be reproduced, the Remote Commander can be used to review the failure 
occurrence data stored in memory to reveal past problems and how often these problems occur.

Diagnostic Test Indicators
When an error occurs, the STANDBY/TIMER LED will fl ash a set number of times to indicate the possible cause of the problem. If there is more than one 
error, the LED will identify the fi rst of the problem areas.
Results for all of the following diagnostic items are displayed on screen.  No error has occurred if the screen displays a “0”.

Power does not turn on 

+B overcurrent (OCP)* 

I-Prot

IK (AKB)

Does not light

2 times

4 times

5 times

2:0 or 2:1

4:0 or 4:1

5:0 or 5:1

•  Power cord is not plugged in.
•  Fuse is burned out (F601). (A Board)

•  H.OUT (Q502) is shorted. (A Board)
•  IC702 is shorted. (C Board)

•  +13V is not supplied. (A Board)
•  IC561 is faulty. (A Board)

•  IC001 is faulty.  (MD Board)
•  Screen (G2) is improperly adjusted.**

•  Power does not come on.
•  No power is supplied to the TV.
•  AC Power supply is faulty.

•  Power does not come on.
•  Load on power line is shorted.

•  Has entered standby state after horizontal raster.
•  Vertical defl ection pulse is stopped.
•  Power line is shorted or power supply is stopped.

•  No raster is generated.
•  CRT Cathode current detection reference pulse       

output is small.