REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

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All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Friday, 1 February 2019

SONY TRINITRON KV-SW21M80 – HOW TO ENTER SERVICE MODE, ADJUSTMENTS, CIRCUIT DIAGRAM

Sony Trinitron KV-SW21M80 – how to enter service mode, adjustments, circuit diagram

Used ICs: STR-F6267(SMPS control), STV9302A(Vertical scan output IC), NX-4751/M3A4(Fly-back transformer), LM2903DT(Comparator), TJM4558CDT(PIN amplifier), IRF614-037(Horizontal scan output FET), AN17804A(Audio amplifier IC), TDA12067H/N1E0B (system controller-Video processor-Audio processor), CAT24WC16W1-TE13(Memory)
Sony KV-SW21M80 - TRINITRON  COLOR TV - RM-GA002 remote control - Middle East -BX1S CHASSIS
ENTERING SERVICE MODE
With the unit on standby [DISPLAY] [ 5 ] [VOL + ]  [POWER] – This procedure is common for most Sony televisions.
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.
c. METHOD OF WRITE INTO MEMORY
1. Set to Service Mode.
2. Press 1 (UP) and 4 (DOWN), to select the adjustment item.
3. Change item by pressing 3, 6.
4. Press [MUTING] button to indicate WRITE on the screen.
5. Press 0 buttons 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.
Display - 0 -  Service data initialization (Be sure not to use usually.)
2, 5 Select Device or Category.
ADJUSTMENT METHOD
Item Number 000 HPOS
This explanation uses H POSITION as an example.
1. Select "000 HPOS" with the 1 and 4 buttons, or 2 and 5.
2. Raise/lower the data with the 3 and 6 buttons.
3. Select the optimum state. (The standard is IF for PAL reception.)
4. Write with the [MUTING] button. (The display changes to WRITE.)
5. Execute the writing with the 0 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 0.
Note : 1. In [WRITE], the data for all items are written into memory together.
2. For adjustment items that have different standard data between 50Hz or 60Hz, be sure to use the respective input signal after adjustment.
SMPS SCHEMATIC
SYSTEM CONTROL-CHROMA SCHEMATIC
VERTICAL and HORIZONTAL SCAN OUTPUT SCHEMATIC
AUDIO OUTPUT SCHEMATIC
Self DIAGNOSTIC TEST INDICATORS
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".
LED blinking codes
[+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.
Power supply “NG” - 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.
PICTURE QUALITY ADJUSTMENT
P MAX/CONTRAST ADJUSTMENT
1. Set TV to Video mode.
2. Set Picture mode to "Custom".
3. Input PAL 100% CB to TV set (OTHERS), NTSC 75% CB (NTSC model).
4. Set PICT 003 "PWL" to 00h WHBL 017 "BLBG" to 01h.
5. Set the following condition:
PICTURE 100%, COLOR 0%, BRIGHTNESS 50%
6. Connect an oscilloscope to pin 4 (R Output) of CN004.
7. Select SADJ 000 "PMAX" with 1 and 4 button of the commander then adjust VR with spec with 3 and 6 until reach the spec below 
1.46 ± 0.03 Vp-p = For 21" without VM models/14" GA models
1.65 ± 0.03 Vp-p = With VM models except NTSC models
1.23 ± 0.03 Vp-p = NTSC models VM models
1.10 ± 0.03 Vp-p = For 21" NTSC non VM models/
14" GA NTSC models.
8. Select Wide Mode to "ON" in TV and Video mode and write "PMAX" data - 8 steps (for models with VCompression features only).
9. Then press [MUTING] - 0 - to write the data.
10. Select "PWL" and "BLBG" back to initial data.
("PWL": 01h and "BLBG": 00h)
11. Then press [MUTING] – 0 - again to write the data.
SUB COLOR ADJUSTMENT
1. Set TV to Video mode.
2. Set Picture mode to "Custom".
3. Input PAL 100% Color Bar(CB) to TV set (OTHER MODEL).
4. INPUT NTSC 75% CB to TV set (NTSC MODEL).
5. Set PICT 006 "WTS" to 00h and Intelligent Picture to "OFF".
6. Set the following condition:
PICTURE 50%, COLOR 50%, BRIGHTNESS 50%, HUE 50%, SHARPNESS 50%.
7. Connect an oscilloscope to pin 2 (B Output) of CN004.
8. Select SADJ 004 "SCOL" with 1 and 4 button of the commander then adjust with 3 and 6 so that VB2=VB3=VB4 (for PAL), and VB1=VB4 (for NTSC) then write in the data +5 step offset.
9. Then press [MUTING] – 0 - to write the data.
10. Set "WTS" back to original data and Intelligent Picture to "ON".
11 Copy no.9 data to PAL TV & DVD mode (OTHER MODEL) and NTSC TV & DVD mode (NTSC MODEL).
SUB HUE ADJUSTMENT
1. Set TV to Video mode.
2. Set Picture mode to "Custom".
3. Input NTSC 3.58 CB to TV set.
4. Set the following condition:
PICTURE 50%, COLOR 50%, BRIGHTNESS 50%, HUE 50%, SHARPNESS 50%.
5. Select service mode and - 5 step offset from SADJ 004 "SCOL" using 1 and 3 button of the remote commander.
6. Connect oscilloscope to pin 2 (B output) of CN004.
7. Set to service mode and select SADJ 001 "SHUE" with 1 and 4 button then adjust to VB1=VB2=VB3=VB4 with 3 and 6 button.
8. Press [MUTING] – 0 - to write the data.
9. Select service mode SADJ 004 "SCOL" and +5 step offset and write the data using [MUTING] – 0 -
10. Select TV channel with 3.58 and repeat item (3) to (7) and +1 step data offset (NTSC model).
11. Press [MUTING] – 0 - to write the data.
12. For single system model with NTSC 4.43, select TV channel with NTSC 4.43 and repeat item (3) to (8).
13. Once adjustment is completed in Video mode, carry out adjustment in DVD mode. Set TV to DVD mode. Input NTSC 3.58 CB to DVD set and perform step 4 to 9 and 11
SUB BRIGHT ADJUSTMENT
1. Set TV to RF mode.
2. Input PAL monoscope to RF mode.
3. Set Brightness 50% and Picture to "MINIMUM".
4. Select WHBL 010 "SBRT" with 1 and 4 button of the remote commander and adjust its data with 3 and 6 so that cut-off level is 10 IRE, slightly glimmer: 20 IRE.
5. Write into the memory by pressing [MUTING] – 0 -.
GEOMETRY ADJUSTMENT
Geometry adjustment must be done for both color systems PAL and NTSC.
a) Input Monoscope or Special Color Bar(SPCB) signal using a pattern generator.
b) Set to Service Mode.
c) Select Category/Functionally Name (as in the service list) using 1 and 4 button on the remote commander.
Eg. GEOM
d) Raise or Lower the data value using 3 and 6 button.
e) Press [MUTING] t - to save the data into memory.
Note 1: Geometry Adjustment must be performed for 4 different modes: PAL 50Hz NORMAL MODE, PAL 50Hz WIDE MODE, NTSC 60Hz NORMAL MODE, NTSC 60Hz WIDE MODE
PAL 50Hz NORMAL MODE
a) Input PAL signal 50Hz in the Service Mode.
b) Set Wide Mode to "OFF".
c) Perform the below adjustments using the "GENERAL SETTING" sequence.
d) Once adjustment is done for PAL 50Hz NORMAL MODE, set Wide mode to "ON", and copy all PAL 50Hz NORMAL MODE adjusted data to PAL 50Hz WIDE MODE except VSCR.
e) Now, perform adjustment for NTSC 60Hz NORMAL MODE.
f) Set Wide mode to "OFF".
g) Perform adjustment items listed in the above table using the "GENERAL SETTING" sequence.
h) Once adjustment is completed, set Wide mode to "ON" and copy all NTSC 60Hz NORMAL MODE adjusted data to NTSC 60Hz WIDE MODE except VSCR.
i) Upon completing adjustment for all modes, reconfirm VSIZ and VPOS
Posted By: FRANK at 07:00
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