4-3. PICTURE QUALITY ADJUSTMENTS

SUB COLOR ADJUSTMENT

1.Input a PAL color-bar.

2.Set to the following condition:

PICTURE 100%, BRIGHTNESS 50%, COLOR 50%

3.Connect an oscilloscope to pin 1 (B OUT) of CN305, A board.

4.Set to Service Mode and select SAJ 3 ‘SCL’ with 1 and 4 of the commander then adjust to VB2=VB3=VB4 with 3 and

6.

5.Press [MUTING] → - of the commander to write the data.

6.Adjust SAJ 3 ‘SCL’ as step 2 to 5 when receiving NTSC color- bar.

VB1 VB2 VB3 VB4

VB2 = VB3 = VB4

SUB HUE ADJUSTMENT

1.Select Video 1.

2.Input a NTSC color-bar, video into Video 1.

3.Set the following condition:

PICTURE 100%, BRIGHTNESS 50%, COLOR 50%

4.Connect an oscilloscope to pin 1 (B OUT) of CN305, A board.

5.Select SAJ 1 ‘SHU’ with 1 and 4 of the commander by set- ting to Service Mode and adjust to VB1=VB2=VB3=VB4 with

3 and 6.

VB1 VB2 VB3 VB4

VB1 = VB2 = VB3 = VB4

6. Press [MUTING] → - of the commander to write the data.

KV-PF21M70/TF21M61/TF21M90/TF21P11

RM-952

BELL FILTER ADJUSTMENT

1.Input SECAM color-bar signal.

2.Connect the dual-trace oscilloscope to the pin 9 (R-Y) of CN303 (not mounted).

3.Adjust SERVICE MODE, ITEMS ‘SBF’ as shown below.

4-4. A BOARD ADJUSTMENT AFTER IC003

(MEMORY) REPLACEMENT

When replacing IC003 (MEMONY), be sure to change IC001 (µ-COM) to the following new IC at the same time.

IC001 (µ-CON) : CXP86449-623S

1.Enter to Service Mode.

2.Press commander buttons 5 and - (Data Initialize), and 2 and - (Data Copy) to initialize the data.

3.Call each item number and check if the respective screen shows the normal picture.

In cases where items are not well adjusted, rectify the items with fine adjustment.

Write the data per each item number ([MUTING] +-).

4.Select item numbers “OPB0” (OP1), “OPB1” (OP2) and “OPB2” (OP3) and respectively set the bit per model with command buttons 3 and 6.

5.Press commander buttons 8 and - (Test Normal) to return to the data that was set on the shipment from the factory. (This will also cancel Service Mode.)

– 57 –

Page 56 Page 58
Page 57
Image 57
Sony KV-TF21P11, KV-TF21M61 Picture Quality Adjustments SUB Color Adjustment, SUB HUE Adjustment, Bell Filter Adjustment
Page 56 Page 58

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.
Top Page Image Contents