Sanyo VHR-120 Series Service Manual

3100S1 l(N)2-2. SERVO CIRCUIT ADJUSTMENT ..... CP-I board and Video pre-amp unitNOTE(1) : These adjustments should be carried out upon completion of the transport adjustments.{2) : If the tape transport adjustments are carried out after these adjustments, follow the procedures again in SWITCHING‘Jo.1POSITIONS,ItemSWITCHINGPOSITIONInputAlignmentcassette(VHJ-0009VHJ&323)ModeHAYPointVIDEOOUTPUTTP101RF SWpulseTP183(Video pre-amp unit)LocationVR351P13S031RemarkI o ,________~I---. ----J[-7 CN33111 IC201,1,t!;,!II1, IC301 I;K)J~1II IJIt iII 1----~.J TM-8 VPS~.--_-l-l-------- 4. ..1~0:!.-.,VR351SW-POVidao signal7654321 —V sync1. Press the tracking control (+) (-) buttonssimultaneously to the center position(on the display ‘T –:– “).2. Adjust VR351 so that the phase of theleading edge of the vertical sync signalis delayed 6.5 * 0.5 H from the rise ofthe RF switching pulse waveform.ch1541CN101 ,1VD- 1 ,,IIrlMESECA.~-_=r ---;I 1det. ~ ,1,1 IIQ1102(IE ;! I IIII IIIIII I~-----,1 II ~ne~ \ ~n{t ~I IC1ll[; ~JL------ I II I1.,1 ~ ~j ~IIII I IIII , IIII , IITN-7 ~I I IICN301 Sync. det.; ~ lL___JL___J~____ ------, LJ‘h---- –----’i’”iL,gI1:1I IolchI @!85‘1:11 0,,,LLJ,---- 1IIIIlRF I\ conv. \I IL---jIFig. 2-2-1 CP-I board (Foil side view)—4—