Service manual

If, for any reason, the stabilization circuit fails, the output voltage VBAT can never
exceed 200 V (via D6514). D6514 will form a short-circuit, VBAT will drop and the set
will switch off (this will result in an audible hiccupping of the supply).
Set to 'POWER OFF' (via RC):
When the set is switched to 'POWER OFF' via the Remote Control, the Main supply will
be switched off.
This is done by the circuit around TS7529 (see diagram A1):
During 'ON'-state the Main supply is fed with line pulses via the STANDBY-line. They
are rectified and smoothed via D6517, D6516, and C2530 and fed to TS7529. Because
they are less than -20 V, this transistor will be blocked.
When these pulses are stopped (via command micro controller to HOP), TS7529 will be
saturated and TS7502 will be switched off. This will switch off the Main supply.
Set to 'POWER ON' (via 'POWER' button of set):
When the set is switched 'ON', the HOP is not working (as much as possible ICs are
made voltage-less during Standby mode. Therefore, it is impossible that the STANDBY-
line carries line-pulses, so the main supply cannot start up. This problem is solved via
the 'low power start-up' possibility of the HOP.
Via pin 22, the HOP receives, via the STANDBY_INFO line from the Painter, a voltage
of 5.2V coming from the Standby supply. The result will be that the HOP will generate
pulses with a nominal TOFF and TON growing from 0 to 30% of the nominal value.
This signal is unchanged until the Main supply is switched 'ON' and the HOP the correct
I2C-command POR-bit) has received.