DOWNLOAD Sony KV-HS29N90 Service Manual ↓ Size: 16.72 MB | Pages: 118 in PDF or view online for FREE

– 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”.

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.

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.

• Power does not come on.

• Vertical deflection pulse is

stopped.

• Vertical size is too amall.
• Vertical deflection stopped.

• Power line is shorted or

power supply is stopped.

• No raster is generated.
• CRT cathode current

detection reference pulse
output is small.

• H pulse output is too high.
• Low B (-10.5V) is too Low.

• There is picture but speaker

does not release sound.

• Power is shut down shorlty,

after this return back
tonormal

• Detect Micro latch up.

Probable

Cause

Location

• Power cord is not plugged

in.

• Fuse is burned out F1601

(F1 Board)

• H.OUT Q5030 is shorted.
• Q5003(PWM-OUT) is

shorted.

• PH 6502 faulty.
• 135V Line is overvoltage

supplied. (D board)

• V.OUT IC5004 faulty

D5001 faulty
D5002 faulty
D5035 faulty
D5036 faulty
R5173 or R5172 open.

• G2 is improperly adjusted.

(Note 2)

• CRT problem.
• Video OUT IC9001,9002,

9003 are faulty. (C1 board)

• IC4301  (E board) are faulty.
• No connection E board to

C1 board.

• C5064 is open circuit.
• CN5002(D board) is

disconnected.

• HOP circuit is failure.
• -10.2V Power Supply or

IC2601 or IC2602 are
failure.

• CN6101 (D board) is

disconnected

• Power Supply fails.
• IC2003, IC1204 faulty.

• Discharge CRT (C1 Board)
• Static discharge
• External noise

Diagnostic

Item

Description

• Power does not

turn on

• +B overcurrent

(OCP) or

• +B overvoltage

(OVP)

• Vertical deflection

failure

• White balance

failure
(no PICTURE)

• Horizontal

deflection failure

• Audio Protection

• Micro reset

Self-diagnostic

display/Diagnostic

result

—

002:000 or

002:001~255

003:000 or

003:001~255

004:000 or

004:001~225

005:000 or

005:001~225

006:000 or

006:001~225

007:000 or

007:001~22500

101:00 or

101:001~225

No. of times

STANDBY/TIMER

lamp flashes

Does not light

2 times

3 times

4 times

5 times

6 times

7 times

-

– 5 –

Diagnostic Item

Flash Count*

+B overcurrentovervoltage

2 times

+B overvoltage

3 times

V deflection stop

4 times

White balance failure

5 times

High voltage protecter

6 times

Audio protection

7 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.

Lamp ON 0.3 sec.

Lamp OFF 3 sec.

Lamp OFF 0.3 sec.

2 times

5 times

4 times

5 times

6 times

7 times

STANDBY/SLEEP lamp

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

– 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 [+]).

002 : 000
003 : 000
004 : 000
005 : 001
006 : 002

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

Numeral "1" means a fault has been detected.

007 : 000

101 : 000

SELF DIAGNOSTIC

Numeral "2" means two faults have been detected.

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 diag-
nostic 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.

– 7 –

[+B overcurrent ªOCPº]

Occurs when an overcurrent on the +B(135) line is detected by Q5004(D board). If
Q6610(D board) go to ON,  the voltage to pin 5 of IC001(A board) go to UP. The unit
will automatically turn off.

[+B overvoltage ªOVPº]

Occurs when an overdrive on the +B(135V) line is detected by D6635(D board), Q6611
and Q6619. If Q6611 go to ON, the voltage to pin 8 of IC001 go to UP. The unit will
automatically turn off.

[Vertical deflection failure]

Occurs when an absence of the vertical deflection pulse is detected by Q5010. Shut
down the power supply.

[White balance failure]

If the RGB levels do not balance or become low level within 5 seconds. This error will
be detected by IC4300. TV will stay on, but there will be no picture.

[High voltage undervoltage protection ªHV UVPº]

High-voltage undervoltage conditions may indicate defective transformer, rectifiers,
CRT or fault within the power supply circuit. When high-voltage drops for any reason,
so does the voltage at T8001.17 and buffer IC8004.7. The malfunction is detected by
comparator IC8006A that generates high logic signal labeled H PROT. This signal is
sent via D8014 to the H prot that opens contacts of the AC relay RY6501 and turns off
main power.

[Audio Protector ]

If the Audio out line became DC. This error will be detected by Q1211, Q1209, and
Q1210.The unit will automatically turn off.

IC4300

CXA2170Q

RGB JUNGLE

FROM

CRT(IK)

Q5018, D8035 
(D Board)

IC001

SYSTEM

IC003

MEMORY

IO-SDAT

IK-IN

HPROT

SDA1

LED

SDA0

5

15

24

57

22

46

52

Q5010 
(D Board)

V PROT

56

OCP

V PROT

5

OVP

V PROT

8

H PROT 87

IC2602
( A Board)

Au PROT

100

IC1203,1240

(A Board)