Sony Trinitron KV HA21M80- service mode, adjustments, full schematic, LED blinking codes and more

TRINITRON Sony KV-HA21M80 - RM-969  BG2T CHASSIS PAL, PAL 60, NTSC3.58, NTSC4.43, SECAM – How to enter service mode, How to adjust the data, Standby LED blinking codes [Error codes], full circuit diagram and more …

Used ICs: MC4558CD, AN5276, CXP85224A-080S, STR-F6707A, MC4558CD, TDA8844N2, AN5522

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 occurred if the screen displays a “0”

If a + B over-current is detected, stoppage of the vertical deflection is detected simultaneously. The symptom that is diagnosed first by the micro controller is displayed on the screen.

STOPPING THE STANDBY/TIMER FLASH

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.

SELF-DIAGNOSTIC SCREEN DISPLAY

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:

HANDLING THE 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 as shown below when the diagnostic screen is being displayed.

“Channel [8] => 0”

[+B overcurrent (OCP)] > Occurs when an overcurrent on the +B(135) line is detected by Q500. If Q500 go to ON and the voltage to pin 50 of IC301 more than 3.5V when V.SYNC is more than seven verticals in a period, the unit will automatically turn off.

Vertical deflection stopped > Occurs when an absence of the vertical deflection pulse is detected by Pin 17 and IC001 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 IC301. TV will stay on, but there will be no picture.

Circuit diagram [Schematic]

ENTERING THE SERVICE MODE

With the unit on Standby > [DISPLAY] > 5 > VOL (+) > [POWER]

METHOD OF CANCELLATION FROM SERVICE MODE

Set the standby condition (Press [POWER] button on the commander), then press [POWER] button again, hereupon it becomes TV mode.

METHOD OF WRITE INTO MEMORY

1) Set to Service Mode.

2) Press [1] (UP) and [4] (DOWN), to select the adjustment.

4) Press [MUTING] button to indicate WRITE on the screen.

5) Press [0] button to write into memory.

MEMORY WRITE CONFIRMATION METHOD

1) After adjustment, pull out the plug from AC outlet, and then plug into AC outlet again.

2) Turn the power switch ON and set to Service Mode.

3) Call the adjusted items again to confirm adjustments were made

[1],[4] Select the adjustment item.

[3], [6] Raise/lower the data value.

[MUTING] Writes.

[0] Executes the writing.

OTHER FUNCTION VIA REMOTE COMMANDER

7, 0 All the data becomes the values in memory.

8, 0 All user control goes to the standard state.

5, 0 Service data initialization (Be sure not to use usually.)

Copy and write all data.

Write 50Hz adjustment data to 60Hz or vice versa.

2,0 

[MUTE], [0] Copy and write all data.

Write 50Hz adjustment To 60Hz or vice versa.

ADJUSTMENT METHOD
Item Number 00 HPS
This explanation uses H Shift as an example.
1. Select “00 HPS” with the 1 and 4 buttons.
2. Raise/lower the data with the 3 and 6 buttons.
3. Select the optimum state. (The standard is 1F for PAL reception.)
4. Write with the [MUTING] button. (The display changes to WRITE.)
5. Execute the writing with the - button. (The WRITE display will be changed to red color while executing, and back to SERVICE.)

Use the same method for all Items. Use 1 and 4 to select the adjustment item, use 3 and 6 to adjust, write with [MUTING], then execute the write with -.
Note:  In [WRITE], the data for all items are written into memory together.
 For adjustment items that have different standard data between 50Hz or 60Hz, be sure to use the respective input signal after adjustment.