Service Notes (Continued)
IMPORTANT: To protect against possible damage to the solid state devices due to arcing or static discharge, make certain that all ground wires and CTR DAG wire are securely connected.
CAUTION: The power supply circuit is above earth ground and the chassis cannot be polarized. Use an isolation transformer when servicing the Receiver to avoid damage to the test equipment or to the chassis. Connect the test equipment to the proper ground (
) or ( 
) when servicing, or incorrect voltages will be measured.
WARNING: This Receiver has been designed to meet or exceed applicable safety and
To maintain original product safety design standards relative to
parts indicated with the symbol 
on the schematic must be replaced with identical parts. Order parts from the manufacturer’s parts center 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.
Board Table Description
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| BOARD | DESCRIPTION |
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| CD* | AB* | BC* | MAIN CHASSIS |
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| AF* | AD* | AD* | CRT BOARD |
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| BAM* | ADM* | ADM* | POWER SUPPLY |
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| AMM* | SECOND TUNER |
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| BC* | PIP BOARD |
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*Note: When ordering a replacement board assembly, append an “S” to the board number.
Example: To order the
replacement board is TNP2AH025BCS.
To order the
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