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Very fast service, best quality of the service manual and the schematics
This service manual of the old video cassette recorder VT-LC50EM is very good readable even the tiniest numbers (i.e. IC-pins). The circuits are very clear. Many details of the schematic are very good described but in GERMAN language. Many schematic details - but complete at all. Common background information of several details are enclosed and physical knowledge of the TFT liquid crystal display for example. The manual lacks PCB drawings. If you understand german I would recommend this manual for you.
Hi, this is a very clear manual, nice copy, not quite up to the standard of the very best available but better than many others. I think the price was especially fair for a hard to find manual and I would certainly use this manual seller again. Recommended.
This schema available for me in good condition. I would highly recommend.
Thanks for this "hard to find" service manual.
I apreciate the good quality of scanning and the pages scanned in A3 format.
0 dB=1 ÂµV
FM VCO Adjustment Procedure :
FM RF signal generator 0.01ÂµF
[AM] RADIO ON/BAND button : AM
AM RF signal generator
Put the lead-wire antenna close to the set.
to ANT (TP1) Carrier frequency : 98MHz Modulation : No moduration Output level : 0.1V (100dB)
30% amplitude modulation by 400Hz signal. Output level : as low as possible
1. 2. 3.
Connect the frequency counter to the positions shown below. Turn the set to 98 MHz. Adjust RV1 for 19,000 Hz reading on the frequency counter.
[FM] RADIO ON/BAND button : FM
FM RF signal generator 0.01ÂµF to ANT (TP1)
Specification Value: Digital frequency counter 18,900 to 19,100 Hz
Frequency counter TP23 1ÂµF
22.5kHz frequency deviation by 400Hz signal. Output level : as low as possible Level meter 16â¦ set
+ â 2 REMOTE jack (J701)
(IC7 pin !â¢) 100â¦ IC7 pin 9
Adjustment Location : [TUNER BOARD] â SIDE A â
â¢ Repeat the procedures in each adjustment several times, and the frequency coverage and tracking adjustments should be finally done by the trimmer capacitors. AM TRACKING ADJUSTMENT Adjust for a maximum reading on level meter. L4 621kHz CT1 1,395kHz FM IF ADJUSTMENT Adjust for a maximum reading on level meter. L3 10.7MHz FM VOLTAGE ADJUSTMENT 1.05 to 1.15 V L2 76MHz
L2 : FM Voltage Adjustment L3 : FM IF Adjustment
CT1 : AM Tracking Adjustment
TP13 IC7 L4 : AM Tracking Adjustment
RV1 : FM VCO Adjustment