Philips SD-4.00SA CH Service Manual page 17

PM3380B
ch1
1
CH1 500mV~ BWLMTB20.0us L=1
Figure 5-19 Y_VID
PM3380B
ch1
1
CH1 500mV~ BWLMTB20.0us L=1
Figure 5-20 R_VID (V) with video out at YUV
5.5.3 Video Hsync Check.
To measure the Video Hsync, the connector 1704 must be
connected to the external video processing device such as high
quality progressive scan codex and high quality Video DAC,
else there will not be any waveform. To check for the Hsync,
the following commands can be used:
Test Instructions Mono Board DVD-SD4.00SA_CH
ch1p
CL 16532163_061.eps
290102
ext p
CL 16532163_025.eps
230102
SD-4.00SA_CH
PM3380B
ch1
1
CH1 500mV~ BWLMTB20.0us L=1
Figure 5-21 B_VID (U) with video out at YUV
5.5.2 Slow Blanking Scart
An aditional part of the video-path is the scart function-
switching test. The scart function-switching pin has three levels
which depend on the level of the output ports SCART0 and
SCART1. These latter two signals are driven by the output pins
PIO3.6 and PIO3.7 of the STi55xx.
Check the level of SCART0 and SCART1 with the following
commands:
Table 5-17 Slow blanking scart
Command
Ref. # Name
25a VideoScartLo 1
25b VideoScartMi 0
25c VideoScartHi 0
5. EN 17
extp
CL 16532163_026.eps
Scart0 Scart1 Level on Pin 8
(PIO3.6) (PIO3.7) of scart
1 0-2V
1 4.5-7V
0 9.5-12V
230102