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There are currently no product reviews.
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Exactly what was needed to assess the product - excellent value and great service
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A site where discontinualed schematic diagrams and back dated information can be found on discontinued radios tv's and any electronic equipment can be found. Newer manuals either Service and operating manuals. Radio amateurs should find this site a great source for ham radio equipment manuals. I will return to this site should I need information on any electrical equipment. priced easy to download in a PDF format and print pages need to undertake the repair.
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Quality scan of the original. All the detail necessary to troubleshoot, repair and adjust the unit. I'm sure I will be downloading more manuals in the future as the need arises.
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Exactly as described, a Service Manual complete with the schematics and PCB layout delivered in a timely manner. Many thanks for the great service.
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some of the writing is a bit blur but the part in the schmatic was great and i have fixed the machine thanks
LC-20B2E
picture, No sound Fluorecent lamp failure to light up
Check all the settings microprocessor's adjust process menu.
Remove F2 F4 and No Is there short-circuiting?
Do F4 check the load side. Replace F2 and F4. Does F1 function?
Yes
P901 and Is pin (34) of in Check the OFL1 line, IC1201 connection cable. the "H" state? and their peripheral parts. outputs, +38V, +16V, +9V, T701 primary side periphery, +5V -8V normal? Q751, Q753 and P901. Are T701's secondary Is there short-circuiting of No
No Yes No
peripheral parts. waveform normal?
Is T701's primary oscillator Check Q3603 and their Is the Q3603 short-circuiting?
Yes
Check T701's secondary T5701 T5702 primary Q5701~Q5703 and load.
No Is there short-circuiting of Check T5701, T5702,
connection cable. side periphery, Q751~Q753.
TROUBLE SHOOTING TABLE
12
Replace the fluorecent lamp with new one and check again.
Yes
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