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 !

Thursday 7 February 2019

SANYO CM29FS2– HOW TO ENTER SERVICE MODE - 29 INCH FLAT CRT TV

Sanyo CM29FS2– How to enter Service Mode - 29 Inch Flat CRT TV

How to enter Service Mode  - Option Mode – Service mode adjustment data  Sanyo CM29FS2 29 Inch Full Flat CRT Television
Service Mode
Press and hold the Volume + button on the front of TV set and press the Menu button on the Remote Control.
Software Version will be displayed.
Press the Program Up / Down button to select the mode required. Then press the Volume + button to adjust.
[Example: Display for [V.Linearity] Vertical Linearity adjustment.]
Exit from the Service Mode
Press the Menu button or turn off the TV set by using the mains switch.
Dealer Mode
When the TV distributed to the market, it should be reset all received channel by following these procedure.
> Press the TV/AV button on the TV set for a about 2 seconds until “MEMORY CLEAR” is displayed.
> Press the Menu button on the TV set while the above On-Screen Display is still on the screen to reset all received channel. The display will changed in red color.
> Wait for a view seconds until the TV is not receive the broadcasting signal. Then turn off the TV.
[When the dealer mode is executed, all received channels, picture settings and audio settings will be reset.]
+B VOLTAGE ADJUSTMENT
Connect a DC voltmeter to TP-B and the ground.
(2) Tune the receiver to an active channel and synchronized picture. Select NATURAL picture mode by pressing the Picture mode selection button on the remote control .
(3) Adjust voltage to 140± 0.5V DC by using VR641.
AGC ADJUSTMENT
Do not attempt this adjustment with weak signal.
(1) connect digital voltmeter to TP-A and GND.
(2) Tune the receiver to most clearest (or strongest) VHF station in your area. Set the brightness and contrast controls to maximum. Set the colour control to minimum.
(3) Enter to the service mode item No. 188 “AGC TAKE OVER”
(4) Press the Volume (+) or Volume (-) button to adjust voltage to be 3.25 ± 0.25V DC.
SCREEN ADJUSTMENT
Receive cross hatch pattern.
(2) Set the picture mode to Dynamic.
(3) Enter to the service mode item No. 08 “VG2”.
(4) Turn screen VR on F.B.T. from min. to max., then the display will change from below to above. Turn back the screen VR to min. side, appear below with OK is displayed then stop turning.
WHITE  BALANCE ADJUSTMENT
(1) Receive circular pattern.
(2) Set the picture mode to Dynamic.
(3) Enter to the service mode “Red” item No. 64 “WPR-N”.
(4) Adjust white balance by Volume (+) or Volume (-) button.
(5) Enter to the service mode “Green” in item No. 65 “WPG-N”.
(6) Adjust white balance by Volume (+) or Volume (-) button.
(7) Enter to the service mode “Blue” in item No. 66 “WPB-N”.
(8) Adjust white balance by Volume (+) or Volume (-) button.
Option Setting
After replacing the Memory IC (IC802)
The memory IC (IC802), stores the option data of TV set and service adjustments data for each circuit, therefore, when the memory IC is replaced, it should be programmed to the following settings.
To enter to the Option Mode
Press and hold the MENU on the remote control and Program down button (CH ▼) on the front panel of the TV. The option window will appear on the screen.
To set the Option Mode
Select the desired option item by pressing the Programme down or up button.
To switch the option mode, use the Level up or down button.
The data which is set in the option mode is stored into the memory IC automatically.
Exit from the Service Mode
Press the Menu button or turn off the TV set by using the mains switch.
Option Mode Mode Description & Note
PLUG & PLAY  = ON or OFF Plug & Play mode, default “ON”
WELCOME TEXT =  ON or OFF Display message when first set up, default “OFF”
AUTO VOLUME ON or OFF =  Auto volume, default “OFF”
TEXT NO SIGNAL ON or OFF =  When no received signal, execution, default “ON”
AFC ON or OFF = Automatic Frequency Control (AFC) available, default “ON”
[The CPU (IC201) and memory IC (IC802) store the service adjustments data and controls data for each circuit.When the Memory IC(IC802) is replaced, some of the service adjustments should be readjusted to obtain the best performance. The necessary service adjustments are carried out by using the RC handset.]
Initializing Procedure
1. Put a new memory IC.
2. Turn on the TV set.
3. Enter to the Service Mode as explanation on next page. Select “002 INIT TV 0” mode, then change to “1” by
pressing Volume + button on Remote Control.
4. When initialised the memory IC are completed, TV set will in stand by mode, all of the setting data (option data and service adjustment data) stored in the IC are reset to the default value. It is necessary to set the option settings and readjust the service adjustments and to re-tune all the channels.
This completes the initialization of memory IC.
Following shows the initialized contents of memory data by this procedure.
- Plug & Play : No executed
- Inhibit Data : Cancelled
- Ch Skip Data : Cancelled
- Swap Data : Cancelled
- Surround : OFF
- Woofer : OFF
- Sound Volume Data : 12/63 steps
- Bass Data : 32/63 steps
- Treble Data : 32/63 Steps
- Colour System : AUTO
- Sound System : BG
Required Service Adjustments
Readjust the following service adjustments.
Adjustments Service Mode No. & Item
Vertical slope = Item 015, Vert. Slope
Vertical shift = Item 016, Vert. Shift
Vertical amplitude = Item 017, Vert. Ampl.
Vertical-S correction = Item 018, S-Corr.
EW width = Item 021, EW Width
Horizontal shift = Item 022, Hor. Shift
Service Adjustments with Replacing Memory IC (IC802)
Following table shows the initial values which have been stored in the CPU ROM, and items for the service adjustments. Service mode adjustments table in CPU ROM.
Specifications
Power Source . . . . . . . .AC110-240V, 50/60Hz.
Colour System . . . . . . . .PAL, SECAM, NTSC4.43, NTSC, PAL 60Hz
Television System . . . . .B/G, D/KK’, I, M/M
Channel Coverage . . . . .VHF: E2-E12, R1-R12, K1-K9, J1-J12, A2-A13
UHF: 21-69, A14-A69, J13-J62
CATV: S1-S41, X, Y, Z, Z+1, Z+2
Video IF . . . . . . . . . . . . . .38.0 MHz
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Posted By: FRANK at 05:30
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