Sony KV-32LS65AUS, Operation Manual

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Chapter 2 Power Supply Circuit
2.1 Power Supply Block Overview
Figure 2.1 Power Supply Block Overview
2.2 Function Overview
The main power supply diagrams in AE-6B chassis are shown as
Figure 2.2 and Figure 2.3. It is similar to FE-2 and LE-3 chassis.
Meanwhile, the power supply circuit for AE-6B and AE-6D chassis is
almost similar. The difference is there is an additional G1 board in AE-
6D chassis.
The primary power supply on the AE-6B chassis G board consists of
three parts:
1. Oscillator
2. Output stage 3. Regulator Stage
The oscillator starts up to produce an initial signal for the output stage.
The output stage develops voltage to continue running the oscillator
stage, supply the regulating stage and provide normal output for the
TV. One of the normal TV outputs is used to start the secondary power
supply.
Oscillator Start Up
The oscillator within IC6001 starts if the VSENSE input voltage at pin 1
is above 1.3 VDC but less than 8 VDC
. The block diagram of IC6001 is
shown in Figure 2.4.
Sample voltage from pin 18 is then used to run the internal oscillator.
The initial frequency is approximately 230 kHz. The low amplitude
initial oscillator signal is output IC6001 / pins 12 and 16 into the
driver/output stage.
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