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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 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’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
* Note: When ordering a replacement board assembly,
append an “S” to the board number.
Example: To order the A-Board for CT-27SX32DF, the
replacement board is TNP2AH025BCS.
To order the A-Board for CT-27SX12SF, the
replacement board is TNP2AH025ABS.
BOARD
CT-24SX12F
CT-24SX12UF
CT-27SX12F
CT-27SX12UF
CT-27SX32F
CT-27SX32UF
DESCRIPTION
A-Board TNP2AH025 CD* AB* BC* MAIN CHASSIS
C-Board TNP2AA068 AF* AD* AD* CRT BOARD
P-Board TNP2AA078 BAM* ADM* ADM* POWER SUPPLY
S-Board TNPA10190 ---* ---* AMM* SECOND TUNER
Y-Board TNPA1059 ---* ---* BC* PIP BOARD