Roadstar LCD-3500 Schematic

R

- LCD-3500

- LCD-3500

LCD-3500

Service Manual

Service Manual

ST-350B REPAIR MUNUAL

Glossary

Antenna Ant
Tuner tun
Pre-I.F. amplifier Pre-IF. amp
Surface acoustic wave filter SAWF
Picture I.F. amplifier P-IF. Amp
Video frequency detector V.F.D.
Intermediate frequency amplifier IF. amp
Video frequency amplifier VF. amp
Sound signal filter SSF
FM detector FM det.
Electronics volume control EVC
Audio amplifier AA
Vertical oscillator V. Osc
Vertical output V. out
Synchronizing separation Syn. sep.
Horizontal AFC H.AFC
Horizontal oscillation H. osc
Horizontal output H. Out
High voltage H.V.
Rectifier and filter R.& F.
Speaker SP.

Liquid Crystal Display LCD

Thin Film Transistor TFT

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SAFETY PRECAUTIONS

WARINING:BEFORE SERVICING THIS CHASSIS, READ “ SAFETY PRECAUTIONS”

AND “PRODUCT SAFETY NOTICE”

SAFETY INSTRUCTIONS

1. Potential as high as 600-800 volts is present when this receiver in operating.

Operation of the receiver outside the cabinet or with the back cover removed
risks a shock hazard fromThe receiver.
(1) Servicing should not be attempled by anyone who in not htoroughly familiar

with the precautions necessary when working on high-volage equipment.
If any fuse in this TV receiver is down, replace it with the fuse specified
in the chassis Parts list.

2. When replacing parts or circuit boards, wind the lead wires around terminals

before Soldering.

3. When replacing a high wattage resistor(metel oxide film resistor) in the

circuit board, keep the resistor 10mm away from circuit board.

4. Keep wires away from high voltage or high temperature components.

5. This TV receiver should be connected to DC 8V.

6. Before returning the set to the customer, always perform an AC leakage current

check on the Exposed metallic parts of the cabinet, such as antennas, terminals,

soresheads, metal overlays Shock. Plug the AC line cord directly into a 240V

AC outlet. (Do not use a line isolation transformer during this check. Use an

ac voltmeter having 1500 ohms per volt sensitivity or more in the following

manner.)With the unit AC switch first ON and OFF, measure form a known

ground(metal waterpipe, conduit,etc.) to all exposed metal parts of the TV

receiver(antennas, handle bracket, metal cabinet screwheads metallic overays,

control shafts, etc.) especially any exposed metal parts that offer an

electrical return path to the chassis. Any measured current must not exceed

0.5 milliamp. Reverse the power cord plug in the outlet and repeat the test.

Any measurements not within the limits specified herein indicate a potential

shock hazard that must be eliminated before returning the set to the customer.

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LCD PANEL INPUT/OUTPUT TERMINALS

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PVI-1004B FRAME DIAGRAM AND PIN FUNCTION

2.PIN ASSIGNMENT

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