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Diagnostic Item

 Flash Count*

+B overcurrent    2 times
Vertical deflection stopped   4 times
White balance failure    5 times

* One flash count is not used for self-diagnostic.

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 flashing.

For errors with symptoms such as "power sometimes shuts off" or "screen sometimes goes out" that cannot be confirmed, it is pos sible to bring up
past occurances of failure for confirmation on the screen:

[To Bring Up Screen Test]
In standby mode, press buttons on the remote commander sequentially in rapid succession as shown below:

 Screen display  

 channel  5

 Sound volume  –

 Power ON

                                                                               

                                                                              Note that this differs from entering the service mode (sound volume 

 +  ).

Since the diagnostic results displayed on the screen are not automatically cleared, always check the self-diagnostic screen during repairs. When
you have completed the repairs, clear the result display to "0".

Unless the result display is cleared to "0", the self-diagnostic function will not be able to detect subsequent faults after completion of the repairs.

[Clearing the result display]
To clear the result display to "0", press buttons on the remote commander sequentially as shown below when the diagnostic screen is being
displayed.

Channel  8

 ENTER

To quit the entire self-diagnostic screen, turn off the power switch on the remote commander or the main unit.

SELF DIAGNOSTIC

2: 0  <-------------

Numeral "0" means that no fault has been detected.

3: N/A 0
4: 0
5: 1   <-------------

Numeral "1" means a fault has been detected one time only.

101: N/A 0

STANDBY/SLEEP lamp

Lamp ON 0.3 sec.

Lamp OFF 0.3 sec.

Lamp OFF

3 sec.

2 times

4 times

5 times

+B overcurrent (OCP) Occurs when an overcurrent on the +B(115V) line is detected by pin 18 of IC301. If the

voltage to pin 18 of IC301 is less than 1V when V.SYNC is more than seven verticals in a

period, the unit will automatically turn off.

Vertical deflection stopped Occurs when an absence of the vertical deflection pulse is detected by pin 17 of IC001.

Power supply will shut down when waveform interval exceeds 2 seconds.

White balance failure If the RGB levels* do not balance within 2 seconds after the power is turned on, this error

will be detected by IC301.  TV will stay on, but there will be no picture.

*(Refers to the RGB levels of the AKB detection Ref pulse that detects IK.)

3

21

18

IK IN

HP/PROTECT

FROM

CRT

FROM

IC521

PIN 7

17

I-PROT

O-LED

18

IC001

SYSTEM

IC301

Y/CHROMA JUNGLE

REF

IC541

V.OUT

36 5

IC003

MEMORY

B-DAT

IO-BDAT

37 SDAT

35

SDA

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

        

   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 microampere).
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 milliammeter. 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
2V AC range are suitable.   (See Fig. A)

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 contact 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 specified

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.

   A cold-water pipe is 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-l00 watts
trouble light (not a neon lamp) between the hot side of the re-
ceptacle and the retaining screw. Try both slots, if necessary, to
locate the hot side of the line, the lamp should light at normal
brilliance if the screw is at ground potential. (See Fig. B)

1.5 k

W

0.15 µF

AC
Voltmeter
(0.75 V)

To Exposed Metal
Parts on Set

Earth Ground

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

The instructions mentioned in this section are partial abstracts from the Operating Instruction Manual.  

The pages numbers show

n reflect those of the Operating Instruction Manual.

•

If any liquid or solid object

falls into the TV

, unplug it

and have it checked by

qualified personnel befor

e

operating it further

.

•

Unplug the TV fr

om the

wall outlet if you ar

e not

going to use it for several

days or mor

e. T

o

 disconnect

the cor

d, pull it out by the

plug. Never pull the cor

d

itself.

For mor

e safety information,

see the “IMPOR

T

ANT

SAFEGUARDS” leaflet packed

with your TV

.

•

T

o pr

event internal heat

build-up, do not block the

ventilation openings.

•

Do not install the TV in a

hot or humid place, or in a

place subject to excessive

dust or mechanical

vibration.

This television r

eceiver

pr

ovides display of television

closed captioning in

accor

dance with § 15.1

19 of the

FCC r

ules.

Article 820-40 of the NEC that

pr

ovides guidelines for pr

oper

gr

ounding and, in particular

,

specifies that the cable gr

ound

shall be connected to the

gr

ounding system of the

building, as close to the point

of cable entry as practical.

Use of this television for other

than private viewing of

pr

ograms br

oadcast on UHF

or VHF or transmitted by cable

companies for the use of the

general public may r

equir

e

authorization fr

om the

br

oadcaster/cable company

and/or pr

ogram owner

.

See your VCR instr

uctions to set up the VCR. 

After connecting

the VCR to the TV

, you will be able to do the following:

•

W

atch video tapes

•

Recor

d one TV pr

ogram while viewing another

•

If your cable system r

equir

es the use of a cable box, install it

between the cable and the VCR.

•

For a monaural VCR, connect the audio output of the VCR to the

AUDIO L

 (MONO) on the TV

.

 

Use this connection to view a video tape fr

om a camcor

der

.

•

For a monaural camcor

der

, connect the audio output of the

camcor

der to 

AUDIO L

 (MONO) on the TV

.

•

If you ar

e connecting your camcor

der to a monaural TV

(KV

-13M50, 13M51, 20M40 only), plug the white audio connector

into the 

AUDIO-L

 input on the TV

.

•

Y

ou can also connect a camcor

der to inputs on the r

ear of the TV

(all models).

The following steps guide you thr

ough your initial set up.

Check the model number of your TV (located on the fr

ont

of this manual) and select the appr

opriate diagram.

This connection of

fers the best pictur

e quality

. Connection

is made dir

ectly fr

om the cable or antenna to the TV

.

If you cannot connect your antenna or cable dir

ectly to the

TV antenna terminal, follow one of the diagrams below

.

Some pay cable TV systems use scrambled or encoded

signals that r

equir

e a cable box* to view all channels.

•

If you will be contr

olling all channel selection through your

cable box, you should consider using the CHANNEL FIX

featur

e discussed on page 1

1.

Insert two size 

AA

 (R6) batteries (supplied) by matching the

+ and – on the batteries to the + and – inside the battery

compartment. W

ith normal use, the batteries should last for

appr

oximately six months.

•

Remove the batteries to avoid possible damage fr

om battery leakage

if you will not be using the r

emote contr

ol for an extended period of

time.

•

Handle the r

emote control with car

e. 

A

void dr

opping it, getting it

wet, or placing it in dir

ect sunlight, near a heater

, or wher

e the

humidity is high.

In the instr

uctions that follow

, please r

efer to the buttons on

your r

emote contr

ol. The r

emote contr

ol shown is model

RM-Y155.

Warnings and Cautions • Connecting the TV • Connecting an Antenna • Connecting a Cable Box

 

Connecting a VCR •

 

Connecting a Camcorder • Using the Remote Control • Inserting Batteries • Remote Control Operation Buttons

This symbol is intended

to alert the user to the

pr

esence of uninsulated

“danger

ous voltage” within the

pr

oduct’s enclosur

e that may

be of suf

ficient magnitude to

constitute a risk of electric

shock to persons.

This symbol is

intended to alert the

user to the pr

esence

of important operating

and maintenance (servicing)

instr

uctions in the literatur

e

accompanying the appliance.

When using TV games,

computers, and similar

pr

oducts with your TV

, keep

the brightness and contrast

functions at low settings. If

a fixed (non-moving) pattern

is left on the scr

een for long

periods of time at a high

brightness or contrast setting,

the image can be permanently

imprinted onto the scr

een.

Continuously watching the

same channel can cause the

imprint of station logos onto

the TV scr

een. These types of

imprints ar

e not cover

ed by

your warranty because they ar

e

the r

esult of misuse.

Y

ou ar

e cautioned that any

changes or modifications

not expr

essly appr

oved in

this manual could void

your authority to operate

this equipment.

•

Operate the TV only on 120

V AC.

•

One blade of the power

plug is wider than the other

for safety purposes and will

fit into the power outlet only

one way

. If you ar

e unable to

insert the plug fully into the

outlet, contact your dealer

.

T

O

 PREVENT ELECTRIC

SHOCK, DO NOT USE THIS

POLARIZED AC 

PLUG

UNLESS THE BLADES CAN

BE FULL

Y

 INSER

TED T

O

PREVENT BLADE

EXPOSURE.

JUMP

ENTER

SLEEP

POWER

MUTING

MTS

CH

VOL

RESET

SELECT

MENU

RM-Y155

TV

TV (POWER)

TV/VIDEO (page 9)

DISPLA

Y

 (page 9)

0–9 buttons

ENTER

MENU

SELECT

CH +/–

MUTING (page 9)

SLEEP (page 10)

MTS (page 14)

 (RM-Y155 only)

JUMP (page 9)

>

 or 

.

 select

 buttons

RESET (page 12, 13)

VOLUME

Model number