COLD) when servicing, or incorrect voltages will be measured.
WARNING
This receiver has been designed to meet or exceed applicable safety
and x ray radiation protection as specified by government agencies
and independent testing laboratories.
To maintain original product safety design standards relative to x
ray radiation and shock and fire hazard, parts indicated with the
symbol on the schematic must be replaced with identical parts.
Order parts from the manufacturer’spartscenter using the parts
numbers shown in this service manual, or provide the chassis
number and the part reference number.
For optimum performance and reliability, all other parts should be
replaced with components of identical specification.
3.5. Horizontal oscillator disable circuit
This chassis employs a special circuit to protect against excessive high voltage and beam
current. If, for any reason, the high voltage and beam current exceed a predetermined level this
protective circuit activates and detunes the horizontal oscillatorthatlimits the high voltage. The
over voltage protection circuit is not adjustable. However, if components indicated by the
symbol
on the schematic in either the horizontal sweep system or the over voltage
protection circuit itselfarechanged, the operation of the circuit should be checked using the
following procedure:
1. DC ammeter
2. High voltage meter (0 ~ 50kV electrostatic)
3. Variac or isolation transformer
4. HHS jig
Preparation:
1. Connect receiver to AC 120 Volts. Do not turn ON
2. Connect HIGH VOLTAGE meter to 2nd anode (H.V. button).
Note:
Use cold ground for negative lead.
3. Connect the ammeter serial from the flyback anode lead to the
picture tube anode socket.
4. Prepare HHS jig to be connected between TPD50 and TPD51 as
shown in the figure
8
Содержание CT-32SC13-1U
Страница 63: ... 50 A Board ...
Страница 65: ... 52 ERJ6GEYJ183V NP2AH037AC ERENCES A Board ...
Страница 66: ... 53 A Board ...
Страница 69: ... 56 D Board ...
Страница 70: ... 57 D Board ...
Страница 71: ... 58 D Board ...
Страница 74: ... 61 notes NOTES ...
Страница 75: ... 62 G Board ...
Страница 76: ... 63 G Board ...
Страница 77: ... 64 G Board ...
Страница 79: ... 66 L Board ...
Страница 80: ... 67 L Board ...
Страница 81: ... 68 A PCB ...
Страница 82: ... 69 A PCB ...
Страница 83: ... 70 D PCB ...
Страница 84: ... 71 D PCB ...
Страница 85: ... 72 G PCB ...
Страница 86: ... 73 G PCB ...
Страница 87: ... 74 L PCB ...
Страница 88: ... 75 notes NOTES ...