13VT-N100
13VT-N150
13VT-CN10
INSTALLATION AND SERVICE INSTRUCTIONS
Note: (1) When performing any adjustments to resistor controls and transformers use non-metallic
screwdriver or TV alignment tools.
(2) Before performing adjustment, TV set must be on at least 15 minutes.
CIRCUIT PROTECTIONHIGH VOLTAGE CHECK
The receiver is protected by a 4.0A fuse (F701), mountedHigh voltage is not adjustable but must be checked
on PWB-A, wired into one side of the AC line input.to verify that the receiver is operating within safe
and efficient design limitations as specified checks
X-RADIATION PROTECTOR CIRCUITshould be as follows:
1. Connect an accurate high voltage meter between
TESTground and anode of Picture tube.
After service has been performed on the horizontal2. Operate receiver for at least 15 minutes at 120V AC
line voltage, with strong air signal or properly tuned
deflection system, high voltage system, or B+ system,
test the X-Radiation protector circuit to ascertain properin test signal.
3. Set to Service mode on, "Mute" and bus data 1(Y-
operation as follows:
1. Apply 120V AC using a variac transformer formute on).
4. The voltage should be approximately 25.4kV (at zero
accurate input voltage.
2. Allow for warm up and using the remote controller,beam). If a correct reading cannot be obtained,
check circuitry for malfunctioning components.
set the brightness level and contrast level to
maximum.After the voltage test, "Mute" and bus data "0" (Y-
mute off).
3. Check the voltage of test point Os voltageTP653. (It
should be about 10.1V DC.)
4. Apply external 13.1V DC at TP653 by using an
external DC supply. The increased voltage will cause
the horizontal oscillator to stop and the TV to shut
off.
5. To re-start the oscillator, remove the external DC
power supply and short together TP651 and TP652.
Once the TV set operates normally again, remove
the short between TP651 and TP652.
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ACEC
