Philips SD-5.31SL Service Manual page 14

EN 14 5. SD-5.31SL
Table 5-12 NameTestpointWaveform
Name Testpoint
DA_XCK F421
DA_BCK F822
DA_DATA0 pin 27/IC7800 Audio data
DA_LRCK F825
SPDIF F821
PM3380B
ch1 ch1 freq 18.5Mhz
1
CH1 1.00V= MTB 20.0ns
Figure 5-10 DA_XCK
PM3380B
ch1 CH1: freq 2.31Mhz
1
CH1 1.00V = MTB 200ns
Figure 5-11 DA_BCK
PM3380B
ch1 ch1 freq 255kHz
1
S T OP
CH1 1.00V= MTB 2.00us
Figure 5-12 DA_DATA0
Test Instructions Mono Board SD5.31SL
Description
Audio clock
Audio bit clock
Audio word
Audio digital out
ch1+
CL 36532043_057.eps
030603
ch1+
CL 36532043_054.eps
030603
ch1+
CL 36532043_055.eps
030603
PM3380B
ch1 ch1 freq 48.1kHz
1
CH1 1.00V= MTB 10.0us
Figure 5-13 DA_LRCK
PM3380B
ch1
T
1
S T OP
CH1 2.00V= MTB 200ns
Figure 5-14 SPDIF
To switch the audio signal OFF, press the STOP button on the
front.
Without A/V board, the switching levels are as follows:
– DA_DATA1,DA_DATA2 and DA_DATA3 switch between
low and high for pink noise. For sine, this is low.
– DA_DATA0, DA_LRCK, DA_XLK and DA_BCK switches
between low and high for both pink noise and sine.
– SPDIF switches between LOW and HIGH
ch1+
CL 36532043_056eps
030603
ch1+
CL 36532043_079.eps
030603