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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 shown 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 before
operating it further.

• Unplug the TV from the

wall outlet if you are not
going to use it for several
days or more. To disconnect
the cord, pull it out by the
plug. Never pull the cord
itself.

For more safety information,
see the “IMPORTANT
SAFEGUARDS” leaflet packed
with your TV.
Protecting the TV
• To prevent 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.

Note on CAPTION VISION
This television receiver
provides display of television
closed captioning in
accordance with § 15.119 of the
FCC rules.
Note to CATV System Installer
Article 820-40 of the NEC that
provides guidelines for proper
grounding and, in particular,
specifies that the cable ground
shall be connected to the
grounding system of the
building, as close to the point
of cable entry as practical.

Use of this television for other
than private viewing of
programs broadcast on UHF
or VHF or transmitted by cable
companies for the use of the
general public may require
authorization from the
broadcaster/cable company
and/or program owner.

See your VCR instructions to set up the VCR. After connecting
the VCR to the TV, you will be able to do the following:
• Watch video tapes
• Record one TV program while viewing another

Notes
• If your cable system requires 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.

 

All models except KV-13M40
Use this connection to view a video tape from a camcorder.

Notes
• For a monaural camcorder, connect the audio output of the

camcorder to AUDIO L (MONO) on the TV.

• If you are connecting your camcorder to a monaural TV

(KV-13M50, 13M51, 20M40 only), plug the white audio connector
into the AUDIO-L input on the TV.

• You can also connect a camcorder to inputs on the rear of the TV

(all models).

The following steps guide you through your initial set up.
Check the model number of your TV (located on the front
of this manual) and select the appropriate diagram.

This connection offers the best picture quality. Connection
is made directly from the cable or antenna to the TV.

If you cannot connect your antenna or cable directly to the
TV antenna terminal, follow one of the diagrams below.

Some pay cable TV systems use scrambled or encoded
signals that require a cable box* to view all channels.

Note
• If you will be controlling all channel selection through your

cable box, you should consider using the CHANNEL FIX
feature discussed on page 11.

Insert two size AA (R6) batteries (supplied) by matching the
+ and – on the batteries to the + and – inside the battery
compartment. With normal use, the batteries should last for
approximately six months.

Notes
• Remove the batteries to avoid possible damage from battery leakage

if you will not be using the remote control for an extended period of
time.

• Handle the remote control with care. Avoid dropping it, getting it

wet, or placing it in direct sunlight, near a heater, or where the
humidity is high.

In the instructions that follow, please refer to the buttons on
your remote control. The remote control shown is model
RM-Y155.

 • 
Connecting the TV

 • Connecting an Antenna • Connecting a Cable Box

 

Connecting a VCR •

 

Connecting a Camcorder • 

ol
 • Inserting Batteries • Remote Control Operation Buttons

This symbol is intended
to alert the user to the
presence of uninsulated

“dangerous voltage” within the
product’s enclosure that may
be of sufficient magnitude to
constitute a risk of electric
shock to persons.

This symbol is
intended to alert the
user to the presence
of important operating

and maintenance (servicing)
instructions in the literature
accompanying the appliance.
CAUTION
When using TV games,
computers, and similar
products with your TV, keep
the brightness and contrast
functions at low settings. If
a fixed (non-moving) pattern
is left on the screen for long
periods of time at a high
brightness or contrast setting,
the image can be permanently
imprinted onto the screen.
Continuously watching the
same channel can cause the
imprint of station logos onto
the TV screen. These types of
imprints are not covered by
your warranty because they are
the result of misuse.

You are cautioned that any
changes or modifications
not expressly approved in
this manual could void
your authority to operate
this equipment.

Safety Precautions
• 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 are unable to
insert the plug fully into the
outlet, contact your dealer.
TO PREVENT ELECTRIC
SHOCK, DO NOT USE THIS
POLARIZED AC PLUG
UNLESS THE BLADES CAN
BE FULLY INSERTED TO
PREVENT BLADE
EXPOSURE.

JUMP

ENTER

SLEEP

POWER

MUTING

MTS

CH

VOL

RESET

SELECT

MENU

RM-Y155

TV

TV (POWER)

TV/VIDEO (page 9)
DISPLAY (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