Philips LX9000R Service Manual page 54

EN 54 5.
5.5.5 Nucleus 904: System Video Loop
Nucleus for testing the components on the video signal system
path:
• The VIP
• The video encoder
• The VSM
• The host decoder
• The analogue board
On the analogue board the video signal will be routed to the
SCART (EUROPE) or CINCH (NAFTA). There it will be looped
back externally by means of the proper cable
NUCLEUS 904: SYSTEM VIDEO LOOP
SCART AUX (EUR)
CINCH IN (NAFTA)
ANALOGUE BOARD
connector
1947
EPG BOARD
optional
connector
1601
DIGITAL BOARD
7500
VIP
VIP_ICLK: 27MHz
EMPRESS
Figure 5-13
LX9000R
SCART TV (EUR)
CINCH OUT (NAFTA)
7408
STV6618
connector
1947
connector
1601
7200
STI 5508
7403 7100
VSM
TR 01012_003
130303
Diagnostic Software DVD
5.5.6 Nucleus 905: System Video VBI Loop
This nucleus tests the components on the video signal path:
• The VIP
• The VSM
• The Host Decoder
The video CVBS signal is routed to the output of the analogue
board where it will be looped back by means of an external
cable
Remark: this test is only successful if nucleus 121 is carried out
first.
SCART AUX (EUR)
CINCH IN (NAFTA)
VIP
NUCLEUS 905: SYSTEM VIDEO VBI LOOP
ANALOGUE BOARD
7408
STV6618
connector connector
1947
EPG BOARD
optional
connector connector
1601
DIGITAL BOARD
7500
VIP_ICLK: 27MHz
7403
EMPRESS
Figure 5-14
SCART TV (EUR)
CINCH OUT (NAFTA)
1947
1601
7200
STI 5508
7100
VSM
TR 01013_003
130303