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 8 March 2019

SANYO DP42647 SERVICE MODE AND TROUBLE SHOOTING

SANYO DP42647 SERVICE MODE AND TROUBLE SHOOTING


SANYO DP42647 

SERVICE MODE AND TROUBLE SHOOTING 


This set has an On-screen Service Menu system included in the CPU that allows remote operation for most of the service adjustments.
SERVICE MENU SYSTEM
1. Enter the Service Menu:
Turn off the receiver and disconnect the AC power supply.
While pressing the Volume (–) button on the television, reconnect the AC power supply. The Service Menu will now appear. The remote can now be used to make adjustments.
2. Service Adjustments:
Press the Channel UP or DOWN key to select the desired service menu item you want to adjust.
Use the Volume + or – key to adjust the data.
The + or – keys will increase or decrease the data sequentially.
3. Exit from the Service Menu:
Press the MENU key to turn off the Service Menu display.
PROGRAM CODES
The microprossesor used in this model is a multi-purpose type and is used in several different models. To ensure proper operation and the correct features for your particular model, the program codes must be correct.
Note 1. Option Data 1 (NO. 087 OPT) should be hexadecimal 18. See 087 above. If this program code is wrong the TV will not operate properly.
Note 2. Option Data 2 (NO. 088 OP2) should be hexadecimal 0A. See 088 above. If this program code is wrong the TV will not operate properly.
POWER FAILURE CIRCUIT
This unit is equipped with a Power Failure Detector function included in the CPU which checks for an abnormal condition in the chassis power supplies.
If, while the power is on, a failure is caused by any of the following that results in a low voltage supply, the CPU will turn the unit off in 1.5 seconds to prevent further damage:
# Failure within the power supply circuits.
# A short circuit in the load side from the supply.
1. Power Failure 1: Detected voltage failure for analog and digital circuits. (Connected to IC801 pin 32.)
2. Power Failure 2: Detected voltage failure for LVDS. (Connected to IC801 pin 36.)
(Normal: High; Failure: Low)
If, while the power is off, the power is switched on and any of these failures remains uncorrected, the CPU will shut off the power within three seconds.
Check the following if the unit is turned off by the power failure detector.
1. Disconnect the AC power cord (120V AC line) for at least 10 seconds.
2. Connect a DC Voltmeter to the circuits shown below.
3. Press the Power key and check for the proper voltage supplies.
4. If any of these voltages is low, the power failure detector should turn the unit off within three seconds.
5. Check all circuits shown below.
Note: This unit is equipped with a Power Surge Protection feature included in the CPU. If power failure occurs three times within 15 minutes, the CPU will stop functioning automatically to help prevent secondary damage. (TV will not turn on by pressing the power key.) To reset the operating programs within the CPU, disconnect the AC power cord for at least 10 seconds.
BACK CABINET REMOVAL
Remove 14 screws to take the cabinet back off

TROUBLESHOOTING
NO AUDIO
Check:
Line: IC001 6pin - IC801 (CPU) 38pin (Mute)
Parts: Around IC001 (Audio AMP.)
Audio Out only
Check:
IC3200 5pin (L) - Audio Out Terminal
IC3200 28pin (R) - Audio Out Terminal
Parts: Q1006, Q1007
RF (TV) only
Check:
A6100 3pin - Q6100 - IC6250 1pin (SIF)
IC6250 22pin - Q6251 - IC1251 1pin(R)
IC6250 23pin - Q6250 - IC1251 12pin(L)
Parts: Around A6100(TU), IC6250, Q6250, Q6251
Digital (TV) only
Check:
A6100 21, 20pin - IC6100 93, 94pin (IF)
IC5500 N4, U1pin - IC6300 5, 6pin (R),
IC5500 T1, T2pin - IC6300 3, 2pin (L),
IC6300 7pin - IC3200 31pin (R),
IC6300 1pin - IC3200 2pin (L),
Parts: Around A6100(TU), IC6100,IC5500,IC6300
AV1, AV2, AV3 only
Check:
AV1 Terminal - IC1251 14pin (L), 5pin (R)
AV2 Terminal - IC1251 15pin (L), 2pin (R)
AV3 Terminal - IC1251 11pin (L), 4pin (R)
HDMI 1 / 2 / 3
Check:
Line: HDMI1 Terminal - IC6502
HDMI2 Terminal - IC6502
HDMI3 Terminal - IC6502
IC6502 21-40pin - IC5500 A1, B2,
C1-C3, D1-D2, E1-E3, F2-F3
Parts: Around IC6502, IC5500, IC6551
NO VIDEO
RF (TV) only
Check:
Line: A6100 4pin - Q101 - IC1201 2pin
Parts: Around A6100 (TU_IF), Q101
AV2 only
Check:
Terminal(Y) - IC6200 12pin (Y)
Terminal(Cr) - IC6200 7pin (Cr)
Terminal(Cb) - IC6200 19pin (Cb)
Parts: Around
IC6200 (AD Converter)
AV3 only
Check:
Terminal(Y) - IC6200 26pin (Y)
Terminal(Cr) - IC6200 22pin (Cr)
Terminal(Cb) - IC6200 28pin (Cb)
Parts: Around
IC6200 (AD Converter)
Digital (TV) only
Check:
A6100 21, 20pin - IC6100 93, 94pin (IF)
Parts: Around
A6100 (TU, IF), IC6100
HDMI 1 / 2 / 3
Check:
HDMI1 Terminal - IC6502
HDMI2 Terminal - IC6502
HDMI3 Terminal - IC6502
IC6502 21~40pin - IC5500 A1, B2,
C1~C3, D1~D2, E1~E3, F2~F3
Parts: Around IC6502, IC5500
All Inputs
Check:
Line: IC5500 - LCD Panel (RGB)
Parts: Around IC5500 (Screen Controller), LCD Panel,
Wire (K5LV: To LCD Panel)
Posted By: FRANK at 04:08
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