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I have this hi-fi system for a long time and I need to repair some things. Founding this manual will be very helpfull :)
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It is pretty good. The schematics were covered all components, the manual also provide the parts list . It's useful for the trouble shooting.
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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.
Pin No. 37 38 39 40 41 42
Pin Name HFL SLOF CV-
I/O O
Description The HFL (high frequency level) signal is used to judge whether the main beam is positioned on the pit or on the mirror.
I I
Sled servo off control input. CLV error signal input from the DSP. RF output. Sets the RF gain and the EFM singal's 3T compensation constant togther with the
CV+ RFSM RFSO O RFSM pin. The SLC (slice level control) signal is output to control the DSP's data slice level of the
43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64
SLC SL1 DGND FSC TBC NC DEF CLK CL DAT CE DRF FSS VCC2 REF1 VR LF2 PH1 BH1 LDD LDS VCC1
O RF waveform. I O I O I I I I O I +search with respect to the reference voltage). (Not connected) O O I VCC of servo and digital circuits. For the connection of bypass capacitor for the reference voltage. Reference voltage output. Sets the time constant for disc defect detection. For the connection of a capacitor to hold the RF signal peak. For the connection of a capacitor to hold the RF signal bottom. APC circuit output. APC circuit input. VCC of RF signal circuits. Input to control the DSP's data slice level. Ground of digital signals. Output for the focus search smoothing capacitor. The TBC (tracking balance control) signal sets the EF balance variation range. Not connected. Disc defect detection output. Reference clock input. 4.23 MHz is input from the DSP. Microprocessor command clock input. Microprocessor command data input. Microprocessor chip enable input. DRF (detect RF) is an output to detect the RF level. The FSS (focus search select) signal switches the focus search modes (+/-search /
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