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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]
Audio
LINE-1 IN
Oscillator
AUDIO
600 Ω
Attenuator
Fig. 7-2-19.
•
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
Audio Level Meter
or Distortion Meter
LINE-1 OUT
47k Ω
AUDIO
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 pin3(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.
Moves to the right when the 4 button in pressed
and to the left when the $ button is pressed.
CH2
CN502 pin 3
(RF SWP)
OK
CH1
AF SWP
NG
RF signel dropout (Should be minimized)
Note : The RF SWP adjustment should be completed before
performing this adjustment.
7-8
TV screen
Normal tracking
Fig. 7-2-20.
A
A
Fig. 7-2-21.
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