|
|
|
Categories
|
|
Information
|
|
Featured Product
|
|
|
 |
|
|
There are currently no product reviews.
 ;
Exactly what was needed to assess the product - excellent value and great service
;
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.
;
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.
;
Exactly as described, a Service Manual complete with the schematics and PCB layout delivered in a timely manner. Many thanks for the great service.
 ;
some of the writing is a bit blur but the part in the schmatic was great and i have fixed the machine thanks
5-2. Print is Too Dark or Too Light
START
Is reference voltage input to pin 2 of IC6 on MA-99 board when �CONTRAST� is set to center position? YES
NO
Peripheral circuits Q200 and Q16 on MA-99 board are defective.
Is reference voltage input to pin 5 of Q7 on MA-99 board when �BRIGHT� is set to center position? YES NO
Peripheral circuits Q16 and RV6 on MA-99 board are defective.
Is voltage (approx. 1.5 to 2.5 V) available at pin 6 of IC304 on MA-99 board when head is at the normal temperature? YES
Peripheral circuit IC401 and pins 29 and 30 of CN9 NO on MA-99 board, or the thermistor in the head are defective.
Are required voltages available at each terminal, 3 V at pin 19 of IC500 on MA-99 board, and 1 V at pin 23 of IC500? YES
Peripheral circuit Q21 on MA-99 board is defective. NO
The head voltage or CN9 on MA-99 board is defective. Is density of stair step printed in test mode properly? NO
YES
The data buses of IC500 and IC503 on MA-99 board are defective.
5-2
UP-895/(E)
|
|
|
> |
|
|
Parse Time: 0.17 - Number of Queries: 107 - Query Time: 0.044
