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Self-Diagnostic Screen Display
For errors with symptoms such as “power sometimes shuts off” or “screen sometimes goes out” that cannot be con

fi rmed, it is possible to bring up 

past occurrences of failure on the screen for con

fi rmation.

To Bring Up Screen Test
In standby mode, press buttons on the Remote Commander sequentially, in rapid succession, as shown below:

 

DISPLAY   

 Channel  5   

 Sound volume  -   

 Power ON.

 

Handling of Self-Diagnostic Screen Display
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 when the diagnostic screen is displayed, as shown below:

 

ENTER

Channel 8

Quitting the Self-Diagnostic Screen
To quit the entire self-diagnostic screen, turn off the power switch on the Remote Commander or the main unit.

1

2

4

3

3

1

2

R5104

R5105

R5125

Q5018

RY6501

Q6527

Q6530

Q6532

D6537

D6505

D5007

PH6501

Q5004

R5013

D5005

IC6505

Q6522

1K-PROT2

+B OVP

HV PROT

UNREG 11V

5V

UNREG 7V

+B OCP

2

1

3

4

IC5007

VDY-

CRT

IC2801

Y/C JUNGLE

SCL

SDA

AKB

VPROT

HPROT

IC2300

MAIN MICRO

M

CLKO

DATO

AC RLY

LOW B ERR

OVP

OCP

STR
STBY-LED

STBY-LED

P_SW(-)

IC504

5V

+B

+B

+B

D

B

M

D

D

A

2

14

34

35

58

26

25

29

30

69

43

44

45

48

O

I

O

Numeral “0” 

means that no fault was detected.

Numeral “1” 

means a fault was detected one 
time only.

+B overcurrent (OCP) 
Occurs when excessive current 

fl ows through R5013. The increase in voltage across R5013 causes the output of Q5004 to go high, and this high 

signal goes to the micro. 

+B overvoltage (OVP) 
IC6505 detects +B OVP condition and turns on Q6522. This sends a high signal to the micro and also shuts down the AC relay.

V-STOP 
Occurs when an absence of the vertical de

fl ection pulse is detected by pin 24 of IC2801 (B Board). 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 IC2801. TV will stay on, but there 
will be no picture.

*(Refers to the RGB levels of the AKB detection Ref pulse that detects 1K).

Low B OCP/OVP
Occurs when set 5V is out.

Occurs when either: 
 

1) a +B overcurrent is detected (IC5007), or 

 

2) overheating is detected (Thermistor TH5002).

1

  CAUTION! - Heat sink on IC5004 is -15V.  Care must be 

taken not to allow heat sink to touch any other components.

2

  Lift lever up on the right and left sides of the chassis bracket 

and gently pull the chassis assembly away from the bezel.

 

Pull up and rotate both the A and D Boards in order to service 
the unit.

 

When plugging in connector from HM Board to B Board at 
CN3603 insure two brown wires are facing upward towards 
neck assembly. 

1

  Lift lever up on the right and left sides of the chassis 

bracket and gently pull the chassis assembly away from 
the bezel.

 

Pull up and rotate both the A and D Boards in order to 
service the unit.

2

3

4

Rear Cover

6 Screws 
+BVTP 4 x 16 

4 Screws
+BVTP 4 x 16 

4 Screws 
+BVTP 4 x 16

1.  Discharge the anode of the CRT and remove the anode cap.

2.  Unplug all interconnecting leads from the de

fl ection yoke, neck 

assembly, degaussing coils and CRT grounding strap.

3.  Remove the Sub-Woofer Assemblies.

4.  Remove the CH or CX Board from the CRT.

5.  Remove the chassis assembly.

6.  Loosen the neck assembly 

fi xing screw and remove.

7.  Loosen the de

fl ection yoke fi xing screw and remove.

8.  Place the set with the CRT face down on a cushion and remove 

the degaussing coil holders.

9.  Remove the degaussing coils.

10. Remove the CRT grounding strap and spring tension devices.

11. Unscrew the four CRT 

fi xing screws [located on each CRT 

corner] and remove the CRT  [Take care not to handle the CRT 
by the neck].

WARNING: High voltage remains in the CRT even after the power is disconnected. To avoid electric shock, discharge CRT before attempting to remove 
the anode cap. After removing the anode cap, short circuit to either the metal chassis, CRT shield, or carbon painted on the CRT. 

NOTE: After removing the anode cap, short circuit the anode of the picture tube and the anode cap to either the metal chassis, CRT shield or 
carbon painted on the CRT.

Turn up one side of the rubber cap in 
the direction indicated by arrow a .

Use your thumb to pull the rubber
cap 

fi rmly in the direction indicated

by arrow b .

When one side of the rubber cap separates from 
the anode button, the anode cap can be removed 
by turning the rubber cap and pulling it in the 
direction of arrow c .

1.  Do not use sharp objects which may cause damage to the surface of the anode 

cap. 

2.  To avoid damaging the anode cap, do not squeeze the rubber covering too hard. 

A material 

fi tting called a shatter-hook terminal is built into the rubber. 

3.  Do not force turn the foot of the rubber cover. This may cause the shatter-hook 

terminal to protrude and damage the rubber.

Coated

Earth

Ground

Strap

6

4

3

9

11

8

1

2

7

5

10