KV-PF21M70/TF21M61/TF21M90/TF21P11

RM-952

SELF DIAGNOSTIC FUNCTION

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.

1.DIAGNOSTIC TEST INDICATORS

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

No. of times

Self-diagnostic

Probable

Detected

Item

STANDBY/TIMER

display/Diagnostic

Cause

Symptoms

Description

lamp flashes

result

Location

 

 

 

 

 

 

• Power does not

Does not light

—

• Power cord is not plugged

• Power does not come on.

turn on

 

 

in.

• No power is supplied to the

 

 

 

• Fuse is burned out F4601

TV.

 

 

 

(F Board)

• AC power supply is faulty.

 

 

 

 

 

• +B overcurrent

2 times

002:000 or

• H.OUT Q511 is shorted.

• Power does not come on.

(OCP) or

 

002:001~255

(A board)

• Load on power line is

overvoltage

 

003:001~255

• IC1800 is shorted. (C5 board

shorted.

(OVP)

 

004:001~255

(except PF21M70)/

• Has entered standby state

• Vertical deflection

 

at the same time

(C3 Board (KV-PF21M70)).

after horizontal raster.

stopped

 

 

• -13V is not supplied.

• Vertical deflection pulse is

• Horizontal

 

 

(A board)

stopped.

deflection

 

 

• IC 503 faulty (A board)

• Power line is shorted or

overdrive

 

 

• IC 301 faulty (A board)

power supply is stopped.

 

 

 

 

 

• White balance

5 times

005:000 or

• G2 is improperly adjusted.

• No raster is generated.

failure (no

 

005:001~225

(Note 2)

• CRT cathode current

PICTURE)

 

 

• CRT problem.

detection reference pulse

 

 

 

• Video OUT IC701 is faulty.

output is small.

 

 

 

(C5 board)

 

 

 

 

• IC301 is faulty. (A board)

 

 

 

 

• No connection A board to

 

 

 

 

C5/C3 boards.

 

 

 

 

 

 

• Micro reset

—

101:00 or

• Discharge CRT

• Power is shut down shortly,

 

 

101:001~225

(C5/C3 Boards)

after this return back to

 

 

 

• Static discharge

normal.

 

 

 

• External noise

• 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.

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Sony KV-TF21M61, KV-TF21P11, KV-PF21M70 service manual Self Diagnostic Function, Diagnostic Test Indicators
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KV-PF21M70, KV-TF21P11, KV-TF21M61 specifications

The Sony KV-TF21M61, KV-TF21P11, and KV-PF21M70 are iconic television models that hold a significant place in the history of consumer electronics. These CRT (cathode-ray tube) televisions were introduced during a time when home entertainment was evolving, showcasing Sony's dedication to delivering high-quality viewing experiences.

The KV-TF21M61 is known for its compact design and impressive image quality, featuring a 21-inch screen size that was perfect for small to medium-sized rooms. Equipped with Sony's advanced Trinitron technology, it delivers vibrant colors and sharp images, making it a favorite among viewers who appreciate clarity and detail. The television features a built-in tuner, allowing users to easily access various TV channels without the need for an external set-top box. The design includes multiple connectivity options, including standard composite inputs, offering versatility for connecting gaming consoles and DVD players.

Similarly, the KV-TF21P11 model carries forward Sony's commitment to exceptional picture quality. With anti-glare screens and enhanced viewing angles, this model ensures that viewers enjoy clear images from different positions in the room. Its user-friendly interface allows easy navigation through channel selections and picture adjustments. The model also includes stereo speakers, providing a richer audio experience that complements the stunning visuals.

On the other hand, the KV-PF21M70 is seen as an evolution of these models, featuring a larger display while retaining the core technological advancements of its predecessors. This unit incorporates Sony's Picture-in-Picture (PiP) feature, allowing users to watch two channels simultaneously or view external input while keeping an eye on live TV. This functionality enhances versatility and user engagement, making it a practical choice for avid viewers who don’t want to miss out on their favorite programs.

All three models are equipped with various sound enhancement features, including bass and treble controls, ensuring users can tailor their audio experience according to their preferences. The robust build quality and reliability typical of Sony products ensure that these televisions remain cherished items even as technology progresses and newer formats emerge.

Overall, the KV-TF21M61, KV-TF21P11, and KV-PF21M70 are more than just old CRT televisions; they represent a significant era in television technology, characterized by brilliant visuals, sound quality, and functional designs that laid the groundwork for modern home entertainment systems. These models remain a testament to Sony's pioneering efforts in the realm of consumer electronics.
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