Diagnostic Software
EN 75
DVDR880-890 /0X1
5.
5.5.1
Nucleus 900: Digital Audio Loop
This nucleus tests the audio path through the digital board
Figure 5-9
5.5.2
Nucleus 901: Audio User Dealer Loop
This Nucleus is only possible in NAFTA sets.
A PCM audio sine of 12kHz is generated in the Host Decoder
for a while and sent to the analogue board. The signal coming
from the analogue board is encoded again and sent to the
memory of the host decoder for comparison. This nucleus tests
the components on the audio signal path:
•
Host decoder
•
Flex connection between connector 1602 (digital board)
and connector 1900 (analogue board)
•
DAC
•
Op-amp
•
Scart switch IC
•
ADC
•
Audio Encoder
•
VIP
•
VSM
Figure 5-10
NUCLEUS 900: AUDIO LOOP DIGITAL
VIP
STI 5508
VSM
EMPRESS
DIGITAL BOARD
ANALOGUE BOARD
GND
VIP ICLK 27MHz
7500
7403
7200
7100
TR 01008_001
080502
NUCLEUS 901: AUDIO USER DEALER LOOP
VIP
STI 5508
VSM
EMPRESS
DIGITAL BOARD
ANALOGUE BOARD
MSP34xx
DAC
ADC
connector
1900
connector
1900
connector
1602
connector
1602
VIP_ICLK:
27MHz
I2S
I2S
HEF4052
7501
7500
7004
7600
7002
7001
7403
7200
7100
TR 01009_001
080502
Summary of Contents for DVDR880/001
Page 48: ...Mechanical Instructions EN 50 DVDR880 890 0X1 4 4 5 Dismantling Instructions Figure 4 14 ...
Page 166: ...Circuit IC Descriptions and List of Abbreviations EN 168 DVDR880 890 0X1 9 ...
Page 167: ...Circuit IC Descriptions and List of Abbreviations EN 169 DVDR880 890 0X1 9 ...
Page 174: ...Circuit IC Descriptions and List of Abbreviations EN 176 DVDR880 890 0X1 9 IC7411 ...
Page 182: ...Circuit IC Descriptions and List of Abbreviations EN 184 DVDR880 890 0X1 9 ...
Page 183: ...Circuit IC Descriptions and List of Abbreviations EN 185 DVDR880 890 0X1 9 ...
Page 184: ...Circuit IC Descriptions and List of Abbreviations EN 186 DVDR880 890 0X1 9 ...
Page 203: ...Circuit IC Descriptions and List of Abbreviations EN 205 DVDR880 890 0X1 9 ...