Small Signal Panel - Philips MG5.1E Service Manual

MG5.1E
6. SMALL SIGNAL PANEL6.1Block diagram
Chassis name
The 'MG' chassis is the successor of the MD1, MD2, GFL-
chassis. The MG architecture is global and can be produced all
over the world.
Explanation chassis name MGX.YZ
X depends on specification
Y depends on introduction-timing
Z region e.g. E(urope); A(sia Pacific); U(SA)
This manual deals with the MG5.1E.
A small signal panel (SSP) is used and a large signal panel
(LSP). On the LSP there are only a few SMD's, but the SSP is
further integrated. There are no modules anymore; the FBX
(feature-box) is integrated on the chassis. Due to the fact that
all features are flat on one board, repair down to component
level is an absolute must.
For this reason there is a lot of diagnostic support built-in in the
chassis:
• customer service mode (CSM) as used in the MD2.2-
chassis. It decreases the number of nuisance calls.
• service default mode (SDM). Predefined state of the set.
• service alignment mode (SAM) to do all kind of alignments,
select test patterns, display error codes,....
• full support of the dealer service tool (DST).

6. SMALL SIGNAL PANEL

6.1 Block diagram
UV13XX TDA9320H
H /V
A
SAA4978 TDA933XH
TOPIC
TDA9178
H /V
A D D
SAA5800
Figure 6-1
New tools and service features
A lot of additional service "features" are built in the MG5.1E.
These "features" can be addressed with a new tool called
ComPair (Computer Aided Repair). This is an interface that can
receive the error codes and can send RC5 and RC6-codes. To
this interface belongs also software and a CD-ROM with the
service manual, circuit descriptions and fault finding trees. In
this way searching for components on the PCB and schematics
is history.
Explanation Small Signal (fig 6.1). The tuner type UV1316 is a
PLL tuner and delivers the IF-signal to the HIP (High-end Input
Processor (TDA9320H)). The HIP has the following functions:
• IF-part
• video source select and record select
• colour decoder (PAL/SECAM/NTSC)
• synchronisation
Three scart connectors can be used. Scart 1 and 2 are full scart
and scart 3 is only cvbs. Scart 2 is meant for VCR, thus on this
scartpin 10 is used for Easylink and there is possibility for y/c in/
out. The cvbs-out on pin 19 can be used for WYSIWYR (= what
you see is what you record). A digital combfilter can be used to
have Y/C separation. The HIP delivers the signal to the PICNIC
(SAA4978). The PICNIC takes care of:
• ADC (9 bits) (was FRONTIC)
• DAC (was ECOBENDIC)
• 100 Hz (was ECOBENDIC)
• Panorama mode (super zoom) (was PANIC)
ROTATION
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