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I work at an authorized service center and I can tell if a manual is as it should be. This one is. It may be a scan, but a very good one at that. The interesting part for me was the curcuit diagram which was scanned at high quality, making it as good as the original. I will definitely be back as a customer. I need not say this, but I will: the price was the best. Thank you owner-manuals.com .
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really a very good manual even sometimes the quality is no so good as before still very readible and very very useful!
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FAST very good and clear a great unexpensive job!!! very recomended for all people who are preofessional or hobbists as me!!!!!!
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Thank you very much for this Service Manual, it helped us a lot to repair the M-4318!
...BUT: The parts list is missing and the free parts katalog on web isn't complete, so now we don't know the part numbers of the defect parts :(
We had to build them out of a working machine, and need the numbers to reorder the missing parts now.
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Very good manual with clear electrical diagrams. Thanks owner-manuals.
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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