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SHARP 20VJ100M
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of SHARP 20VJ100M Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

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Text excerpt from page 5 (click to view)
20/21V-J100M 20/21V-J200S

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, the TV set must be on at least 15 minutes.

CIRCUIT PROTECTION
The receiver is protected by a 3.15A fuse (F701), mounted on PWB-A, wired into one side of the AC line input.

HIGH VOLTAGE CHECK
High voltage is not adjustable but must be checked to verify that the receiver is operating within safe and efficient design limitations as specified checks should be as follows: 1. Connect an accurate high voltage meter between ground and anode of picture tube. 2. Operate receiver for at least 15 minutes at 110 ~ 220V AC line voltage, with strong air signal or properly tuned in test signal. 3. Set service mode on (See next page.), and select service adjustment "S19" and Bus data "01" (Y-mute on). 4. The voltage should be approximately 20V-J100M / J200S 26.5kV 21V-J100M/J200S 27kV (at zero beam)." If a correct reading cannot be obtained, check circuitry for malfunctioning components. After the voltage test, make Y-mute off to the normal mode.

X-RADIATION PROTECTOR CIRCUIT TEST
After service has been performed on the horizontal deflection system, high voltage system, B + system, test the X-Radiation protection circuit to ascertain proper operation as follows: 1. Apply 220V AC using a variac transformer for accurate input voltage. 2. Allow for warm up and adjust all customer controls for normal picture and sound. 3. Select a local channel. 4. Connect a digital voltmeter to TP653 and make sure that the voltmeter reads 20.6 ±1.5V. 5. Apply external 26.8V 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.

+115V DC Regulator Adjustment
The +115V DC Adj. control (R721) is adjusted at the factory. However, should readjustment be required, proceed as follows: 1. Actuate the receiver with 220V AC input voltage. 2. Select a good local channel. 3. Connect positive lead of digital voltmeter to R603 TP751 (positive side) on PWB-A; negative lead to chassis ground. 4. Adjust R721 to obtain a +115V DC reading. Caution : The reading should be within +115V ± 1 V DC to ensure normal function and circuitry reliability.

5

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