SONY SLV679HF
Manual de Servicio

3. SERVO SYSTEM CHECK 3-1. RF Switching Position Adjustment (MA-341 Board) [Adjustment Purpose] To adjust the link of the A-ch and B-ch of the tape playback outputs. To make the unit compatible with other tapes and units. If this specification is not satisfied, the link will appear on the screen and the screen will be disrupted, etc. Mode Signal Measurement point Playback Alignment tape: SP color bar portion CH1: CN270 pin 2 (PB RF) CH2: CN270 pin 3 (RF SWP) Oscilloscope REMOCON CH+/� A=minimize

4. AUDIO SYSTEM ADJUSTMENT � Adjust both L ch and R ch. [Connecting Instruments]
Audio line OUTPUT L/R Audio line INPUT L/R Audio oscillator 600 � Attenuator VTR Audio level meter or distortion meter 47 k�

Measuring instrument Adjusting element Specified value

Fig. 6-2-4
4-1. Hi-Fi Audio System Adjustment (Hi-Fi model only) � Perform the adjustment setting the switch on the following positions. � AUDIO MONITOR ..................................................... STEREO [Adjustment Method] 1. ACE head adjustment.....Refer to the VHS mechanical adjustment manual (S MECHANISM)(9-921-647-11). 2. E-E output level check 3. �Recording Bias Adjustment�

[Adjustment Method] 1) Playback the alignment tape. 2) Short JS401 to Ground. 3) Check that �A P� is indicated on FL display. 4) Adjust so that part A becomes minimized at CH +/�. 5) Write data in EEPROM by pressing PAUSE button. Monoral model: 6) The display �A P� disappears and then the Adjustment mode terminates. Hi-Fi model: 6) The display changes to �A H� and the mode goes to the HiFi switching position Adjustment.

A CH1 PB RF CH2 RF SWP

Fig. 6-2-3

6-3