19L-M100, CL19M10
19L-M100S, 20ML10
INSTALLATION AND SERVICE INSTRUCTIONS
Note: (1) When performing any adjustments to resistor controls and transformers use non-metallic
screwdrivers or TV alignment tools.
(2) Before performing adjustments, the TV set must be on at least 15 minutes.
CIRCUIT PROTECTIONHIGH VOLTAGE CHECK
The receiver is protected by a 4.0A fuse (F701),High voltage is not adjustable but must be checked
mounted on PWB-A, wired into one side of the to verify that the receiver is operating within safeAC
line input.and efficient design limitations as specified checks
should be as follows:
X-RADIATION PROTECTOR CIRCUIT TEST
1. Connect an accurate high voltage meter between
After service has been performed on the horizontalground and anode of picture tube.
deflection system, high voltage system, +B system,
2. Operate receiver for at least 15 minutes at 120V AC
test the X-Radiation protection circuit to ascertainline voltage, with a strong air signal or a properly
proper operation as follows:tuned in test signal.
3. Enter the service mode and select the service
1) Apply 120V AC using a variac transformer foradjustment "S19" and Bus data "01" (Y-mute on).
accurate input voltage.4. The voltage should be approximately, 26.0kV (at zero
2) Allow for warm up and adjust all customer controlsbeam).
for normal picture and sound.If a correct reading cannot be obtained, check
3) Receive a good local channel.circuitry for malfunctioning components. After the
4) Connect a digital voltmeter to TP653 and make surevoltage test, make Y-mute off to the normal mode.
that the voltmeter reads 21.3 ?1.5 V.
5) Apply external 28.9V DC at TP653 by using an
external DC supply, TV must be shut off.
6) To reset the protector, unplug the AC cord and make
a short circuit between TP651 and TP652. Now make
sure that normal picture appears on the screen.
7) If the operation of the horizontal oscillator does not
stop in step 5, the circuit must be repaired before
the set is returned to the customer.
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ACEC
