Samsung HTZ210 – Initialization, update, full schematic with waveform display – Connector pin voltages - Digital Home Theater System

 Always unplug the unit’s AC power cord from the AC power source before attempting to: (a) Remove or reinstall any component or assembly, (b) Disconnect an electrical plug or connector, (c) Connect a test component in parallel with an electrolytic capacitor.
 Some components are raised above the printed circuit board for safety. An insulation tube or tape is sometimes used. The internal wiring may be clamped to prevent contact with thermally hot components. Reinstall all such elements to their original position.
 After servicing, always check that the screws, components and wiring have been correctly reinstalled.  Make sure that the portion around the serviced part has not been damaged.
 Check the insulation between the blades of the AC plug and accessible conductive parts (examples: metal panels, input terminals and earphone jacks).
 Insulation Checking Procedure 
Disconnect the power cord from the AC source and turn the power switch ON.
Connect an insulation resistance meter (500V) to the blades of the AC plug.
The insulation resistance between each blade of the AC plug and accessible conductive parts (see above) should be greater than 1 megohm.
 Never defeat any of the B+ voltage interlocks. Do not apply AC power to the unit (or any of its assemblies) unless all solid-state heat sinks are correctly installed.
 Always connect a test instrument’s ground lead to the instrument chassis ground before connecting the positive lead; always remove the instrument’s ground lead last.
Operation of Power Block Protection Circuit.  The Condition of Power Protection Active.
1. Voltage of SMPS’s PVDD (+34.5V, J3) is higher or lower than Standards.  Normal Condition Voltage Range: PVDD (+34.5V, J3): about +34.5V
2. Over-current occurs to AMP IC. (Over-output or Output short)
3. AMP IC’s temperature exceeds 150°C.
4. No supply voltage on GATE DRIVER.