DOWNLOAD Sony KV-BZ212M10 Service Manual ↓ Size: 8.48 MB | Pages: 80 in PDF or view online for FREE

– 3 –

The units in this manual contain a self diagnostic function. If an error occurs, the STANDBY (1) indicator will automatically
begin to flash. The number of times the STANDBY (1) indicator flashes translates to a probable source of the problem. 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 (1) indicator will flash a set number of times to indicate the possible cause of the
problem. If there is more than one error, the indicator will identify the first of the problem areas.

Result for all of the following diagnosis items are displayed on screen. No error has occurred if the screen displays a "0".

Diagnosis

Item

Description

No Power

+B overcurrent
(OCP)

V-Protect (OVP)

IK (AKB)

Power supply
NG (+5V) for
Video Processor

No. of timer

STANDBY (1)

indicator flashes

Does not light

2 times

4 times

5 times

8 times

Diagnostic Result
on screen display

–

2:0

or

2:1 ~ 255

4:0

or

4:1 ~ 255

5:0

or

5:1 ~ 255

8:0

or

8:1 ~ 255

Probable Cause

Location

• Power cord is not plugged

in.

• Fuse is burned out (F600)

A board.

• H OUT (Q805) is shorted.

(A board)

• IC751 is shorted. (C board)

• +13V is not supplied.

(A board)

• IC804 is faulty. (A board)

• Video OUT (IC751) is

faulty. (C board)

• IC001 is faulty. (A board)
• Screen (G2) is improperly

adjusted.

• IC604 faulty.
• IC602 faulty.

Detected

Symptoms

• Power does not turn on.
• No power is supplied on TV.
• AC Power supply is faulty.

• Power does not turn 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 shorted.

• No raster is generated.
• CRT Cathode current

detection reference pulse
output is small.

• No power supply to CRT

ANODE.

• No RASTER is generated.

The example above represents for 4 times blink

Lamp OFF 3 seconds 

Lamp ON 300ms

Lamp OFF 300ms

Standby indicator

– 4 –

[+B overcurrent $OCP%]

Occurs when an overcurrent on the +B(135V) line is detected by pin 32 of IC001 (A board).
If the voltage of pin 32 of IC001 (A board) is more than 4V, the unit will automatically go to
standby.

[V-PROTECT]

Occurs when an absence of the vertical deflection pulse is detected by pin 13 of IC001
(A board).

[IK $AKB%]

If the RGB levels* do not balance within 15 sec after the power is turned on, this error will be
detected by IC001 (A board). TV will stay on, but there will be 5 times LED blinking.

Occurs when IC001 internal HV protect detects an abnormal H-Pulse (frequency) due to
improper power supply to IC001. TV cuts off high voltage power of anode CRT. No picture will be
detected. eg: IC602, IC604 go faulty.

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

POWER SUPPLY NG (+5V)
for VIDEO PROCESSOR

5

8

1.

Display self diagnostic screen

[Display] t [Channel    ] t [Volume    ] t [Power / TV]

Note: The above must be performed while TV is on standby mode.

2.

Stop standby flash

i) Turn off power switch on main.
ii) Unplug power cord from the outlet.

3.

Clear fault result

[Channel    ] t 

-

Note: Diagnostic results display on screen is not automatically cleared. Therefore,
clear result after completion of repair.

4.

Quit self diagnostic screen

Turn off power switch of remote commander or main unit.

2 OCP 

:  0

3 OVP 

:

N/A

4 VSTOP  :

1

5 AKB 

:

0

8 SUP 

:

0

101 WDT :  N/A

"0" means no fault has been detected.

"1" means a fault has been detected.
"2" means two faults have been detected.

"N/A" means not available for this models.

SELF DIAGNOSTIC

A BOARD

IC001

Y/CHROMA JUNGLE

A BOARD

IC804

V.OUT

A BOARD

IC001

SYSTEM

A BOARD

IC003

MEMORY

FROM

C BOARD

IC751 PIN 5

IK

EHTO

RED LED

DISPLAY

SDA0

V.GUARD

SDA

5

F.B-PLS

3

13

84

32

122

A BOARD

FROM

Q816

COLLECTOR

109

– 5 –

1 Seven screws
     (+BVTP 4 

× 16)

2 Rear cover

1

 Four screws

     (+P4x16)

A Board

1

 One screw

 (+BVTP 

3 

× 12

 Type2 

IT-3)

2

 Terminal bracket

3

 Two screws

 (+BVTP 

4 

× 12

 Type2 

IT-3)

– 6 –

• After removing the anode, short circuit the anode of the picture tube and the anode cap to the metal chassis, CRT shield or

carbon paint on the CRT.

• REMOVING PROCEDURES

1 Turn up one side of the rubber cap in the direction

A.

2 Using a thumb pull up the rubber cap firmly in the direction

B.

3 When one side of the rubber cap is separated from the

C.

• HOW TO HANDLE AN ANODE-CAP

1 Do not damage the surface of anode-caps with sharp

2 Do not press the rubber too hard so as not to damage

3 Do not turn the foot of rubber over too hard.

A

A

B

B

C

 Anode Button

• For KV-BZ212M10, this picture tube is upside down and the position for the anode cap and tension springs are change

accordingly.

• Please make sure the TV set is not in standing position before removing necessary CRT support located on bottom right

and left.

1) Remove the Rear Cover.
2) Unplug all interconnecting leads from the Deflection Yoke, Neck Assy, Degaussing Coils and CRT grounding strap. Remove

Chassis Assy.

3) Place the TV set with the CRT face down on a cushion (jig).

qa

 Earth Coating Assy

4

 Anode Cap Removal

8

 Band, DGC Removal

5

 C Board Removal

qd

 Spring Tension(x2) Removal

qf

 Screw Tapping 7+ Crown Washer (x4)

q;

 Degaussing Coil

6

 Loosen the Neck Assembly

 

fixing screw and remove

 neck 

Assy

7

 Loosen the Deflection Yoke

 

fixing screw and remove

9

 Holder, DGC Removal (x2)

qs 

Supports, CRT

 Removal 

(x2)