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Very fast service, best quality of the service manual and the schematics
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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.
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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.
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This schema available for me in good condition. I would highly recommend.
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Thanks for this "hard to find" service manual.
I apreciate the good quality of scanning and the pages scanned in A3 format.
Glossary-1240
Service Vol. II
GLOSSARY (cont.)
SIGNAL NAME DESCRIPTION
TEST(L)
The I/O Processor Board�s signal line used to check the ability of the 280 CPU to write a value out to the board edge connector and correctly read it back. Also, the 9-Channel�s strobe signal derived from Control Processor control lines; used for gating probe and board I.D. data through the Status Monitor. The acquisition board T clock falling edge indicator; active when the probe C/Q line goes from a logic 1 to logic 0. The Trigger�s load signal for control RAMS containing sequence commands for true and false conditions. The 9-Channel�s threshold write signal derived from Control Processor control lines; used when setting the 9-Channel�s threshold setting. The 18-Channel�s threshold write signal derived from Control Processor control lines; used when setting the 18-Channel�s threshold setting. The 18-Channel�s timebase selection programming strobe. The Display Board�s timing diagram data signal carrying serial data to the Timing Diagram ROM. Also the 9-Channel�s signal derived from Control Processor control lines; used as a write strobe for loading timing control values. The Display Board�s timing mode signal used to indicate the display is currently generating timing diagrams. Trigger Position signals from the trigger circuitry located on the Control Processor to the Trigger Board; indicates zero detection (where zero is the trigger location). Trigger position indicator 1 and 2 ripple clock signals from the Trigger Board to the Control Processor Board; used to clock upper 8 bits. The Trigger�s master reset signals for the Trigger Position Indicator counters. The Trigger�s control signal used to specify glitches on the Test Pattern Generator. The Trigger�s control signal used to specify either T1 (true) or 12 MHz (false) as the base clock for the Test Pattern Generator. The Trigger�s T1 signal for the Test Pattern Generator clock in TPG modes 2 and 3. The Trigger�s TPI 1 and 2 prescale readback.
TFA LLING(L) TF RAM(L) THRESH(L)
THRESH(H)
TIMEBASE(L) TIMING(H)
TM 0DE(L) TPl(L), TP2(L)
TPIl(H), TP12(H)
TPI1, TP12 RESET(H) TPG GL(L) TPG Tl(H) TPG T1 CLK(H) TPRO-7(H)
12-14
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