Philips SD-5.31SL Service Manual page 13

Table 5-7 NVRAM Write/Read check command
Ref. # Command Name
15 PapNvramWrR
5.4.2 Audio Clock Check
The internally generated Audio clock can be set to either 44.1
kHz (CD_DA), 48 kHz (DVD) or 96 kHZ (DVD). To check the
different mode, use the following commands and measure the
waveform as correct operation cannot be detected by the
Diagnostic Software.
Table 5-8 Audio clock check
Command
Ref # Name Remark
8a PapSgsAclk Internal PLL
Cdda CLK in CD-DA
mode (Fig 5-4)
8b PapSgsAclk Internal PLL
Dvd CLK in DVD
mode (Fig 5-5)
8c PapSgsAclk Internal PLL
Dvd96 CLK in DVD
mode (Fig 5-6)
PM3380B
ch1 ch1 freq 18.5Mhz
1
CH1 1.00V=
Figure 5-7 Internal PLL CLK in CDDA mode
PM3380B
ch1 ch1 freq 18.4MHz
1
CH1 1.0 V= MTB 20.0ns
Figure 5-8 Internal PLL CLK in DVD48kHz mode
Test Instructions Mono Board SD5.31SL
Remark
NVRAM Write Read
Test
point Frequency
F421 16.934 MHz
± 0.02%
F421 18.432 MHz
± 0.02%
F421 36.864 MHz
± 0.02%
MTB 20.0ns ch1+
CL 36532043_057.eps
ch1+
CL 36532043_059.eps
030603
PM3380B
ch1 ch1
1
CH1 1.00V=
Figure 5-9 Internal PLL CLK in DVD96kHz mode
5.4.3 Audio Mute Check
Switch on the Mute circuit by sending next command:
Table 5-9 Audio mute ON check command
Ref. # Command Name Remark
19a
Check the Mute output again at testpoint F603: 3V3 ± 10%
Switch off the Mute circuit by sending next command
Table 5-10 Audio mute OFF check command
Ref. # Command Name Remark
19a
Check the Mute output at testpoint F603: 0V ± 0.3V
5.4.4 Audio I2S Check
To check the audio output from the internal audio DAC on the
Monoboard, execute the following commands and observe the
030603
I2S audio outputs for both sine and pink noise.
Table 5-11 Audio I2S check commands
Ref. #
21a
20a
20b
The audio signal (sine or pink noise) will also be present on the
digital ouput (SPDif). This can be checked by connecting an
amplifier with digital input.
Check the I2S output.
SD-5.31SL
freq 36.9MHz
MTB 20.0ns
AudioMuteOn AudioMuteOn
AudioMuteOff AudioMuteOff
Command
Name Remark Audio outputs
AudioSineOn Audio Sine Audio Sine signal On
signal Off Sine, 1kHz on stereo
Press stop button
AudioPinkNoi Audio Pink Noise on 6
seOn Pinknoise channels
On
AudioPinkNoi Audio
seOff Pinknoise
Off
5. EN 13
ch1+
CL 36532043_060.eps
030603