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This service manual was determinant to enable to fix my Alpine Amplifier. I am pleased with my purchase. For a 5 star rating I would like to see a higher resolution scan of the printed circuit board lay-out because the gray scale grafics was dificult to see. Also some schematic diagrams were scanned at a slight angle. Never the less, it had all information I needed to troubleshoot and service my equipment.
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Complete manual, the good quality of reproduction allows enlarged print-out of the schematic diagram in the size it probably had in the original print edition and which is necessary for practical use.
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The service manual was complete and the components on the drawings very good visible.
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downloaded next day , manual is very helpful , fast and easy
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This Service Manual was exactly what I needed to repair my Philips TV. The purchase was convenient and I received the manual at the same day I paid for it.
5
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8
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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