Sony SLV-7700KME, Service Manual, Page: 102 / 135

7-8
2-7-1. AF Switching Position Adjustment (MA-303 Board)
[Adjustment Object]
To adjust the link of the Ach and Bch of the tape playback outputs.
If this specification is not satisfied, the noise will increase and
cracking sounds will be produced.
Mode Playback
Signal Alignment tape
Measurement CH1 : AF SWP (ADJ LAND)(RP-233 board)
point CH2 : CN502 pin
3
(RP SWP)(RP-233 board)
Measuring
Oscilloscope
instrument
Adjustment
RV201
element
Specified
No dropouts in the RF signal
value
[Adjusting Method]
1)
Set TRACKING switch (Remote commander) to MANUAL.
(“Auto tracking” display will disappear on the display window
indicator.)
2) Press the tracking buttons $ and 4 and adjust the tracking
position to the center.
3) Use RV201 to adjust so that the portion A is minimized.
2-7. AUDIO SYSTEM ADJUSTMENTS
• For the adjustment of the audio system, perform in the SP mode
if there is no special notes. Use the alignment tape.
• Adjust both LCH and RCH.
[Connecting Instruments]
•
Hi-Fi Audio System Adjustment
Perform the adjustment setting the switches and controls on the
following positions if there is no special indications.
•
INPUT SELECT (VHS) switch .......................................... 1
• AUDIO MONITOR switch * ...................................... Stereo
* : Remote commander
Fig. 7-2-19.
Fig. 7-2-20.
Fig. 7-2-21.
Note : The RF SWP adjustment should be completed before
performing this adjustment.
Audio
Oscillator
Attenuator
LINE-1 OUT
AUDIO
LINE-1 IN
AUDIO
600
Ω
47k
Ω
Audio Level Meter
or Distortion Meter
Normal tracking
TV screen
Moves to the right when the 4 button in pressed
and to the left when the $ button is pressed.
RF signel dropout (Should be minimized)
A A
OK
CH1
AF SWP
CH2
CN502 pin
3
(RF SWP)
NG