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2-1-6. Adjusting Sequence Make the electrical adjustment in the following sequence.
Checking power supply
2-3.
2-3-1.
SERVO SYSTEM ADJUSTMENT
RF Switching Position Adjustment (MA-323 Board)
Servo system adjustment
Purpose: Adjust the interval between A ch and B ch of tape playback output. Improve the interchangeability with other tapes and sets. When it is out of order, the interval appears on the screen, the screen is disturbed. Mode Signal PB Alignment tape SP mode color bar CH1: VIDEO LINE OUT CH2: Pin 2 of CN501 (RF SWP) Oscilloscope 6.5 ± 0.5 H (416 ± 32 µsec) PAL 6.5 ± 0.5 H (410 ± 32 µsec) NTSC
Audio system adjustment
2-2.
2-2-1.
POWER SUPPLY ADJUSTMENT
Measurement Point Power Supply Check HS-921SF1 BOARD,  SR-708 BOARD  E-E Digital voltmeter Pin 9 of CN600 �10.3 ±0.8 V  
Mode Measuring Instrument �10 V check Measurement Point Specified Value +6 V check Measurement Point Specified Value +13 V check Measurement Point Specified Value +35 V check Measurement Point Specified Value
Measuring Instrument Specified Value
Adjusting Method: 1) Connect MA-323 board JS140 to the GND for about 1 secont to activate the RF switching position adjustment mode. 2) Check appear �A P� on FL display. 3) Using the channel + and � buttons, adjust to 6.5 ± 0.5 H. 4) Press the pause button.
Pin 7, 8 of CN600 5.9 ± 0.2 V
Pin 2, 3 of CN600 13.3 ± 0.5 V Pin 1 of CN600 38.0 ± 3.0 V
V enargement Vertical sync. signal CH1 CH1 Approx. 1 Vp-p
CH2
Approx. 5 Vp-p
Checking Method: 1) Confirm that each voltage meets its specified value. 2-2-2. +6 V Adjustment HS-921SF1 BOARD,  SR-708 BOARD    REC or PB Digital voltmeter Pin 7, 8 of CN201 RV201 (HS-921SF1 BOARD) VR201 (SR-708 BOARD) 5.9 ± 0.2 V
CH2
Mode Measuring Instrument Measurement Point Adjusting Element Specified Value
6.5 ± 0.5 H (416 ± 32 µsec) PAL (410 ± 32 µsec) NTSC
Fig. 7-2-3.
7-2
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