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– 3 –

................................

4

........................................................................

8

2-1.

Rear Cover Removal ................................................ 19

2-2.

Speaker Removal ..................................................... 19

2-3.

Chassis Assy  Removal ............................................. 19

2-4.

Service Position ....................................................... 19

2-5.

Replacement of Parts ............................................... 20

2-5-1. Replacement of Control Button .....................................

20

2-5-2. Replacement of Light Guide ..........................................

20

2-6.

D3 Board Removal .................................................. 20

2-7.

Terminal Bracket Removal ...................................... 20

2-8.

H2 Board Removal .................................................. 21

2-9.

A and B6 Boards Removal ...................................... 21

2-10. Picture Tube Removal .............................................. 21

3-1.

Beam Landing .......................................................... 23

3-2.

Convergence ............................................................. 24

3-3.

Focus Adjustment .................................................... 26

3-4.

G2 (Screen) and White Balance Adjustments ......... 27

4-1.

Adjustments with Commander ................................ 28

4-2.

Adjustment Method ................................................. 29

4-3.

Picture Quality Adjustments .................................... 34

4-4.

A Board Adjustment After IC003 (Memory)
Replacement............................................................. 34

4-5.

Picture Distortion Adjustment ................................. 35

5-1.

Block Diagram ......................................................... 37

5-2.

Frame Schematic Diagram ...................................... 40

5-3

Circuit Boards Location .......................................... 43

5-4.

Schematic Diagrams and Printed Wiring Boards ... 44

(1)

Schematic Diagram of A (1/2) Board ...................... 47

(2)

Schematic Diagrams of A (2/2) and D3 Boards ..... 51

(3)

Schematic Diagram of C6 Board ............................... 57

(4)

Schematic Diagrams of H2 and VM1 Boards ......... 59

(5)

Schematic Diagram of B6 Board ............................ 67

5-5.

Semiconductors ........................................................ 70

6-1.

Speaker Bracket ....................................................... 73

6-2.

Chassis ..................................................................... 74

6-3.

Picture Tube ............................................................. 75

....................................... 76

– 4 –

The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY/TIMER lamp will automatically
begin to flash.
The number of times the lamp flashes translates to a probable source of the problem. A definition of the STANDBY/TIMER
lamp flash 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.

When an errors occurs, the STANDBY/TIMER lamp will flash a set number of times to indicate the possible cause of the
problem. If there is more than one error, the lamp will identify the first of the problem areas.

Result for all of the following diagnostic items are displayed on screen. No error has occured if the screen displays a “0”.

Diagnostic

Item

Description

• Power does not

turn on

• +B overcurrent

(OCP) or
overvoltage
(OVP)

• Vertical deflection

stopped

• Horizontal

deflection
overdrive

• White balance

failure (no
PICTURE)

• Micro reset

Detected

Symptoms

• 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 deflection 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.

• Power is shut down shortly,

after this return back to
normal.

• Detect Micro latch up.

Note 1: If a + B overcurrent is detected, stoppage of the vertical deflection is detected simultaneously.

The symptom that is diagnosed first by the microcontroller is displayed on the screen.

Note 2: Refer to screen (G2) Adjustment in section 3-4 of this manual.

No. of times

STANDBY/TIMER

lamp flashes

Does not light

2 times

5 times

—

Self-diagnostic

display/Diagnostic

result

—

002:000 or

002:001~255
003:001~255
004:001~255

at the same time

005:000 or

005:001~225

101:00 or

101:001~225

Probable

Cause

Location

• Power cord is not plugged

in.

• Fuse is burned out F8601

(B6)

• H.OUT Q511 is shorted. (A

board)

• IC1800 is shorted. (C6

board)

• -13V is not supplied. (A

board)

• IC 503 faulty (A board)

• G2 is improperly adjusted.

(Note 2)

• CRT problem.
• Video OUT is faulty. (C6

board)

• IC301 is faulty. (A board)
• No connection A board to

C6 board.

• Discharge CRT (C6 Board)
• Static discharge
• External noise

– 5 –

Diagnostic Item

Flash Count*

+B overcurrent/overvoltage

2 times

Vertical deflection stopped

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.

STANDBY/SLEEP lamp

Lamp ON 0.3 sec.

Lamp OFF 3 sec.

Lamp OFF 0.3 sec.

2 times

5 times

– 6 –

For errors with symptoms such as “power sometimes shuts off” or “screen sometimes goes out” that cannot be confirmed, it
is possible 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 (mode 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] / 0

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

002 : 000
003 : 000
004 : 000
005 : 001

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

Numeral "1" means a fault has been detected.

101 : 000

SELF DIAGNOSTIC