Service manual

Notice that a very big part of the set (Large Signal Panel) is 'hot,' meaning the primary
part of the Standby supply, the whole Main supply (except for the secondary Audio
supply), and the complete deflection circuit.
So notice that the deflection-coil is hot.
This set is not equipped with an IR transmitting LED. Instead, a Service (ComPair)
connector is implemented at the rear of the set, which is directly accessible (not
necessary to remove the rear cover).
In addition to this, there is a blinking LED procedure to show the contents of the error
buffer.
The relay you hear during switching 'on' (via the power switch) is from the degaussing
circuitry. So it is not used for switching the supply as in the MG chassis.
When there is a menu on the screen, it is not possible to enter a service mode. So see
to it that there is no menu on the screen when attempting to enter a service mode.
Main Power Supply
The simplest way to replace components of the Main supply is with repair kit: 3122 785
90340.
More detailed way:
1. Replace FET 7504 and zener 6505.
2. Remove SSB panel.
3. Short circuit BE of TS7529 in order to put supply in 'on' mode (TS7529 is
blocking then).
4. Load capacitor C2515 (VBAT) with a 500 ohm power resistor (supply cannot
work without a minimum load).