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Service Manual

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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of SONY SLVF990B Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

The manual is available in languages: English

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Text excerpt from page 71 (click to view)
[Adjustment Method] 1) Short-circuit between pin 5 (AV ADJ) and 3 (GND) of CN261 for about 1 second to activate the RF switching position adjustment mode. 2) Check that “AF” is indicated on FL display. 3) Using the program + and – buttons, adjust to 416 ± 32µsec (6.5 ± 0.5H). 4) Press the PAUSE button. 5) The set goes to the AF switching position adjustment mode.

2-4. VIDEO SYSTEM CHECKS For the video system checks, follow the checking procedures given below as a rule. The color bar video signal supplied from the pattern generator is used as the video input signal for the video system adjustment of the recording mode. Check that the signal satisfies the specified value designated in the “Check of input signal” (Fig. 6-2-2) Unless otherwise specified, set the switches to the following positions. • INPUT SELECT switch ................................................. LINE 1 • TAPE SPEED switch ............................................................ SP [Checking Sequence] 1) X’tal OSC Check 2) SYNC AGC Check 3) White clip/Dark clip Check 4) Recording Y Level Check 5) Recording Chroma Level Check 6) Playback Level Check 2-4-1. Mode X’tal OSC Check (MA-316 Board) Playback Alignment tape: SP Color bar portion Q211 Emitter Oscilloscope and Frequency counter 4,433,619 ± 96Hz


Approx. 1Vp-p Approx. 5Vp-p V Enlargement Vertical sync. signal



CH2 (CN261 PIN 2 (RF SWP)) (RP-231)

6.5 ± 0.5H (416 ± 32 µsec)

Signal Measurement point Measuring instrument Specified value

Fig. 6-2-3
6) 7) 8) 9) Check that “AH” is indicated on FL display. Using the program + and – buttons, minimize a chipped portion. At this time, confirm that a noisy sound is not heard. Press the PAUSE button. Press the EJECT button.
CH2 RF SWP (CN261 PIN 2) (RP-231)

Note: A frequency counter should be connected through a buffer amplifier (oscilloscope, etc.) having a high impedance and a low capacitance. [Check Method] 1) Check that the oscillation frequency satisfies the specified value and that the oscillation voltage is 500 ± 200mVp-p.

500 ± 200mVp-p
CH1 OK HF ADJ (CN341 PIN 1) (RP-231) NG

4,443,619 ± 96Hz

Fig. 6-2-5

Should be minimized RF signal dropout

Fig. 6-2-4


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