|
|
|
Who's Online
There currently are 6043 guests online. |
|
Categories
|
|
Information
|
|
Featured Product
|
|
|
 |
|
|
There are currently no product reviews.
 ;
This is an excellent information source. Great quality and tons of info regarding technical service for the Technics SH8065.
;
5 stars on this manual since it is the complete version, not the half manual you find free for download all over the web. Good job.
;
Thank you very much you are helping me a lot with my preferred hobby!!! this manual of an old TV is going to be very helpful!!!!
You are very honest competent great job very clear and well done!!!!
Matteo
;
An excellent service manual contains dismantling locations of components, electronic adjustments,worth the money.
;
Caracteristiques,circuit adjusment,notes on schematis diagram,it's a good service manual,to live well,thanks.
2-3.
2-3-1.
SERVO SYSTEM Adjustment
2-4.
VIDEO SYSTEM ADJUSTMENT
RF Switching Position Adjustment (RP-230 Board) 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 Measurement Point PB Alignment tape SP mode color bar CH1: VIDEO LINE OUT CH2: Pin 2 of CN261 (RP230 board) (RF SWP) Oscilloscope 6.5 ± 0.5 H (416 ± 32 µsec)
Adjust the video system in the following sequence as a rule. The color video signal supplied from the pattern generator is used as a video input signal for video system adjustment in the recording mode. Make sure that sync. and color burst signals meet requirements specified at set up of adjustment shown in Fig. 7-2-1. [Adjustment Sequence] 2-4-1. Playback Y Signal Level Check 2-4-2. Recording Chroma Level Check 2-4-3. Sync. AGC Check 2-4-4. X�tal Oscillation Frequency Check 2-4-1. Playback Y Signal Level Check (MA-315 Board)
Measuring Instrument Specified Value
Purpose: Confirm that the playback Y signal level is correct. Mode Signal Measurement point Measurement equipment Specified value PB Alignment tape SP color bar Pin #� IC201 Oscilloscope 2.10 ± 0.18 Vp-p
Adjusting Method: 1) Connect RP-230 board Pin 5 of CN261 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 416 ± 32 µsec (6.5 ± 0.5 H). 4) Press the pause button.
Confirmation Method: 1) Confirm that the play Y level is 2.10 ± 0.18 Vp-p.
CH1 CH2 Approx. 5 Vp-p V enargement Vertical sync. signal Approx. 1 Vp-p
White (100%)
2.10 ± 0.18 Vp-p
H
Fig. 7-2-4.
CH1
CH2
6.5 ± 0.5 H (416 ± 32 µsec)
Fig. 7-2-3.
7-3
|
|
|
> |
|
