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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
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A M
IC152 (pins 2, 5) DDC_RX1
Q
IC101 (pins 58, 59, 62, 63, 66, 67, 70, 71) TMDS_RX2
A
Are signals detected?
No
Check the soldering of CN101. If soldering has not been done correctly, replace CN101.
Do signals (approx. 0.5 Vp-p) run in all the lines?
No
Check the soldering of CN102. If soldering has not been done correctly, replace CN102.
M
Yes
IC152 (pins 3, 6) Are signals the same as those at Pins 2 and 5 detected ? N Yes Q153 (pins 1, 4) Are signals the same as those at Pins No 6 and 3 but whose voltage has been converted from 5V to 3V detected? Yes
R
Yes DDC_RX2 No Check the soldering of CN102. If soldering has not been done correctly, replace CN102.
B
IC172 (pins 2, 5) No Check the soldering of IC152. If soldering has not been done correctly, replace IC152.
Are signals detected?
R
Yes
IC172 (pins 3, 6) Are signals the same as those at Pins 2 and 5 detected ? Check the soldering of IC172. If soldering has not been done correctly, replace IC172.
C
Check the soldering of Q153. If soldering has not been done correctly, replace Q153.
No
S
Yes
O
IC161 (pins 2, 15) Are signals the same as those at Pins 3 and 13 detected immediately after the power is turned on? Yes IC151 (pin 8) No Check the soldering of D151. If soldering has not been done correctly, replace D151.
Q173 (pins 1, 4) Are signals the same as those at Pins 6 and 3 but whose voltage has been converted from 5V to 3V detected? Yes
No
No Check the soldering of IC161. If soldering has not been done correctly, replace IC161.
Check the soldering of Q173. If soldering has not been done correctly, replace Q173.
P
O
IC161 (pins 4, 11)
D
Is the voltage about 5V? Yes
Are signals the same as those at Pins 3 and 13 detected immediately after the power is turned on?
No Check the soldering of IC161. If soldering has not been done correctly, replace IC161.
Check the soldering of IC151. If soldering has not been done correctly, replace IC151.
T
Yes IC171 (pin 8)
Is the voltage about 5V? Yes Replace IC171
No
Check the soldering of D171. If soldering has not been done correctly, replace D171.
E
F
VSX-AX4AVi-S
5 6 7 8
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