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 !

Wednesday, 27 March 2019

HITACHI HDR-081 _ HDR-161 _ TROUBLESHOOTING TIPS

HITACHI HDR-081 _ HDR-161 _ TROUBLESHOOTING TIPS





TROUBLESHOOTING


FAULTY SUPPLY/
DO NOT OPEN/
DO NOT INIT


























NO VIDEO/
BAD VIDEO IMAGE








NO AUDIO/
BAD AUDIO& PARASITIC









 DISPLAY ERROR



OSD ERROR




 CRASH&SW LOCKED




 AV Switching ERROR



HARD DISK ERROR
  1. Control the 3,3V,5V,12, supply voltages from the PL451 connector
  2. Control the frequency of the 27MHz X25 crystal.
  3. Control the frequency of the 133Mhz from the S116 point.
  4. Control the IC600 RESET IC 5V supply voltage .After power on the device , RESET IC output must be high in 200ms.  1.2V must be seen on the C600 reset pin.
  5. Control the R187 , R188 , R189, R195 I2C lines.
  6. Control the HDD , remove the HDD power cable and control if there is a Sc or not on the HDD .The resistor value between 5V to GND is nearly 4Kohms.
  7. Control that all cables are connected between the boards.(AVcable, power cable ,HDD data cable)




    • Control the TV scart pins.
    • Control the IC200 supply voltages and SDA&SCL lines.
    • Control the video signals on the PL200& PL304 connectors.


1. Control all audio output from the SCART AUDIO OUTPUTS
2. Control the IC200 supply voltages and SDA&SCL lines.
3. Control the capacitors C226& C227 on the Av board.
4. Control the signal from the point of C143 C144 capacitors on the
main board.
5. Control dc signal on the C143 C144 capacitors on the main board.


1. Control the 3.3V , VFDDATA&DISPCLK signals on the PL 453.
2. Control the transistors Q410 ,Q404 ,Q403 around the PL610 connector.
3. Control the IC2 on the front board.

Control the sections that are written in the first part.

1. There may be a SW error. Load the sw again.
2. Control the X100 crystal
3. Push the standby button for a few seconds.

Control the IC200 supply voltages and SDA&SCL lines


1. Control the HDD 12V & 5V supply voltages from the HDD power connector.
2. Control the HDD , remove the HDD power cable and control if there is a Sc or not on the HDD .The resistor value between 5V to
GND is nearly 4Kohm.Control the HDD data cable.
3. Use FTI and HDD format options on the SW menu to reset HDD.