Teac CTM4828H, Service Manual

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SM-32PM P.6
ALIGNMENT INSTRUCTION
I.PLEASE READ BEFORE ATTEMPTING SERVICE
1.Do not connect any antenna plug directly to the tuner socket and do not
connect any equipments directly to the TV chassis,otherwise it may be
burnt out the TV or equipment,execept an isolation transformer is used for
main power source or the TV sets.
2.Never disconnect any leads while receiver is in operation.
3.Disconnect all power before attempting any repairs.
4.Do not short any portion of the circuit while power is on.
5.For safety reasons,all parts replaced should be identical(for parts and
part numbers see parts list).
6.Before alignment the set must be pre-heated for 30 minutes or more and
erase magnetism thoroughly from CRT front chassis frame by erase coil.
II.TEST EQUIPMENT
1.Colour Bar/Dot/Cross Hatch
2.Oscilloscope
3.Vacuum Tube Voltmeter
4.Volt Ohumeter
I. B+ ADJUSTMENT
1.Connect a digital voltmeter to B+ and Ground.
2.Set Brightness Contrest to minimum.
3.Adjust Screen Volume on FBT until the picture can just been seen.
4.Adjust VR901 to obtain a reading of 112 + 0.5V(FOR samsung CRT).
II. AFC ALIGNMENT
1.Disconnect the soldering pad ‘F’.
2.Input the signal from Pattern Generator ( IF 38.9MHz ) colour bar to R101 and GND.
3.Adjust the T101 until the colour bar show on the screer.
4.Select ‘SELF VCO’in D-MODE.
5.Press the AFC button on the handset.
6.About few seconds screen willbe show AFT OK.
*REMARK: No this factory on Normal R.C.
III.AGC ALIGNMENT
1.Receive CH69 (UHF) and input filed strangth. TUNER INput Signal 62 + 3dB,
2.Connect a digital Voltmeter between the TUNER AGC Terminal and Ground.
3.Select RAGC item,Adjust the value to 3F,and then adjust the AGC value obtain the voltage drop down 0.4V.
Remark: 1 The drop down voltage should be more than and tends to 0.4V.
2 No observable noise can be seen.
IV.VERTICAL LINEARTY ADJUSTMENT
1.PAL (50Hz)Adjustment
(1).Reneive Crosshatch Pattern (50Hz) .
(2).Select VLIS item adjust value to normal regular picture.
2.NTSC (60Hz) Adjustment.
(1).Reneive Cross hatch Patter (60Hz).
(2).Select VILN item adjust value to normal regular picture.
3.Repeat 1.2. receive Cross hatch 50Hz and 60Hz is same picture.
V. VERTICAL HEIGHT ADJUSTMEN
T
1.PAL (50Hz) Adjust .
(1).Recive Mono scope Patter (50Hz).
(2).Select HITS item adjust value to normal regular picture.
2.NTSC (60Hz).
(1).Receive Mono scope Patter (60Hz).
(2).Select HIT item adjust value to normal regular picture
3.Repeat 1.2. receive Mono Scope Patter 50Hz and 60Hz is same picture.
5.High Voltage Meter
6.Ampere Meter (0.5 Class,DC 3mA Max.)
7.Demagnetizing Coil
8.Closed Caption Encoder
9.High Pot Tester.