Pioneer AVH-P5750DVD/RC Service Manual page 120

1
Check 4 : Is the video circuit operated normally?
Reproduce DVD-REF-A1 Title 2 Chapters (White 1000IRE)
Monitor the output with the oscilloscope, by setting the COMPO signal to a GND reference.
A
Set the Trigger mode to the TV trigger, and the Trigger line to line-150.
Verification location 1
No.
(Sensing pin)
1 COMPO
If the result is not satisfactory, check to see if there are any problems with resin flux cored solder and other
defects in the applicable line, vicinity of major parts stated in the above diagram (Circuit Diagram
peripheral components.
B
COMPO Signal
Color brust
Pedestal Level
C
< Method of Readjusting Video Levels >
If the video composite output is not within the range of rated value, the video level is readjusted in the following
method.
Turn the video level adjustment volume (VR1551) to adjust its level to 1.0
Check 5 : Is SDRAM I/F operated normally?
Reproduce DVD-REF-A1 Title 1.
D
Check Circuit Diagram
Common to all DVD-V adapted modules
Check the conductivity of both the "Verification location 1"and the "Verification location 2."
If the result is not satisfactory, check to see if there are any problems with the resin flux cored solder, parts and
components, in areas where as problem occurs, for the overall sequence of "output" "input" of the checked
location.
Signal name
No.
MA0
1
MA1
2
MA2
3
MA3
4
E
MA4
5
MA5
6
MA6
7
MA7
8
MA8
9
MA9
10
MA10
11
MA11
12
F
120
1
2
Rated value Reference waveform
1.0 0.02Vpp
Rated value
Horizontal periodic signal
Composite signal white 100% output waveform
3
Verification location 1 Verification location 2
IC1570 25pin IC1501
IC1570 26pin IC1501
IC1570 27pin IC1501
IC1570 60pin IC1501
IC1501
IC1570 61pin
IC1570 62pin IC1501
IC1570 63pin IC1501
IC1570 64pin IC1501
IC1570 65pin IC1501
IC1570 66pin IC1501
IC1570 24pin IC1501
IC1570 21pin IC1501
AVH-P5750DVD/RC
2
3
Waveform 4
PEAK
When the result is not satisfactory,
adjust the level to 1.0
BOTTOM
Rated value
220pin 56 5%
217pin 56 5%
214pin 56 5%
210pin 56 5%
212pin
56 5%
216pin 56 5%
219pin 56 5%
227pin 56 5%
229pin 56 5%
235pin 56 5%
228pin 56 5%
231pin 56 5%
3
4
) and
3
0.02Vpp.
0.02Vpp.
4