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SHARP XL50H
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of SHARP XL50H Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

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Text excerpt from page 38 (click to view)
XL-40H/50H
• HF error.
Is output (tracking error signal) obtained at the pins 46 (TEI) and 47 (TEZI) of IC802 the CD TEST MODE "STEP 4" is changed to "STEP 5"? Yes
test mode "step 4" test mode "step 5"

No

Is output obtained at the pins 2 and 5 of BI802/CNS802 No

Optical pickup failure.

Yes Check the periphery of IC801. Check the PWB pattern between pin 12. (TEO) of IC801 and pins 46 and 47 of IC802. Is it normal ? Yes Check the PWB pattern between pin 50 (TEO) of IC802 and pin 18 of IC804. Check the periphery of IC804 and BI801/CNS801. If OK. Optical pickup failure. IC801 is faulty. No

TEI TEZI

Is output (HF signal) obtained at the pin 38 (RFI) of IC802 when the CD TEST MODE "STEP 4" is changed to "STEP 5"? Yes
test mode "step 4" test mode "step 5"

No

Is output obtained at the pins 1 and 3, 4 of BI802/CNS802. No Yes Check the periphery of IC801.

Optical pickup failure.

RFI

Check the PWB pattern between pin 19 (RFGO) of IC801 and pins 38 (RFI) of IC802. If OK. IC801 is faulty

Is output (HF signal) obtained at the pins 41 (RFZI) and 42 (RFRP) of IC802 when the CD TEST MODE "STEP 4" is changed to "STEP 5"? Yes
RFZI RFRP test mode "step 4" test mode "step 5"

No

Check the periphery of IC801. Check the PWB pattern between pin17 (RFRP) of IC801 and pins 41 (RFZI) and 42 (RFRP) of IC802. If OK. IC801 is faulty.

Is the following wave output to the pin 55 (DMO) of IC802 when the CD TEST MODE "STEP 4" or "STEP 5"? Yes
DMO test mode "step 4" test mode "step 5"

No

Check the periphery pins 28~32 of IC802. If OK. IC802 failure.

Normal.

• No sound.
No sound from both L and R-ch? No Yes Check the interval between the pins 82 or 85 of IC802 and the pins 1 or 3 IC601.

Is +4.5V applied to pin 83 (DVDD) of IC802? Yes No

Check the PWB pattern between R819 and Q861.

Is signal of pins 82 and 85 of IC802 output? Yes The main PWB is faulty. No

Check the peripheral parts of IC802. If OK, IC802 is faulty.

– 38 –

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