Philips SD-4.00SA CH Service Manual page 15

Test Instructions Mono Board DVD-SD4.00SA_CH
PM3394B
ch1
1
CH1 1.00 V~ MTB 500ns
Figure 5-11 PCMDATA
PM3380B
ch1
1
CH1 2.00 V=
Figure 5-12 PCMCLK
PM3380B
ch1
1
CH1 2.00 V= BWL MTB100ns
Figure 5-13 SPDIF
To switch the audio signal OFF, press the STOP button on the
front.
Without A/V board, the switching levels are as follows:
– DATA_LsRs and DATA_CL switch between low and high
for pink noise. For sine, this is low.
– PCMDATA0, PCMLRCLK, PCMCLK and PCMSCLK
switches between low and high for both pink noise and
sine.
– SPDIF switches between LOW and HIGH
ch1+
CL06532065_010.eps
161100
MTB20.0ns ch1+
CL 26532053_067.eps
210502
ch1+
CL 16532163_024.eps
230102
SD-4.00SA_CH
Alternatively, there is a check that can be done without A/V
board.
First, let the decoder generate pink noise on the audio outputs.
Table 5-14
Ref. # Command Name Remark
20a AudioPinkNoiseOn Audio Pinknoise On
Measure then these signals on level and frequency.
Table 5-15
Signal Level between
PCMLRCLK low/high
PCMSCLK low/high
PCMCLK low/high
PCMDATA low/high
SPDIF LOW/HIGH
Put the pink noise off:
Table 5-16
Ref. # Command Name
20b AudioPinkNoiseOff
5. EN 15
Frequency
48kHz 0.02%
3.072MHz 0.02%
12.288MHz 0.02%
N/A
N/A
Remark
Audio Pinknoise Off