Справочник Пользователя для Mitsubishi Electronics VS-60609

Oscilloscope

TP14A, TP15A

------

50mV/Div

RF Monaural
300 Hz modulation

RF Input

Set the input signal level to the MCS circuit.

Distorted sound during a stereo broadcast.

1. Supply an RF monaural signal to the Ant A input, 300 Hz at 100% modulation

(25 kHz deviation).

2. Connect the oscilloscope to TP15A (Right Channel).  (Junction of

R2K64 and R3A38)

3. Enter the Adjustment Mode and select the Audio Function.
4. Verify that the Audio Function items are set to the data values given the

table below.

5. Adjust Item “1 INP” for 1.55 ±0.06 Vp-p at TP15A.
6. Connect the oscilloscope to TP14A.  (Junction of R2K62 and R3A15)
7. Confirm that the left channel output at TP14A is 1.55 ±0.06 Vp-p.

Note: 

Adjustment 2 (Stereo Separation) must be performed after this adjustment)

Oscilloscope

TP14A, TP15A

------

10mV/Div

RF Stereo

RF Input

Adjust for optimum stereo separation.

Poor stereo separation

This adjustment must follow Adjustment 1 (Input Level)

1. Supply a RF Stereo Signal to the Ant. A input.

• Left Channel = 300 Hz modulation
• Right Channel = no modulation signal

2. Connect the oscilloscope to TP15A (right channel). (Junction of

R2K64 and R3A38)

3. Enter the Service Mode and select the Audio Function.
4. Adjust Item “3 WDE” for minimum signal at TP15A.
5. Change the modulation frequency to 3 kHz.
6. Adjust Item “4 SPC” for minimum signal at TP15A.

1

INP

7

2

AUT

0

3

WDE

16

4

SPC

16

15

MZX

1

16

VZX

1

20

ATK

1

Activate …….. MENU-0-1-5-7
Function …...………..AUDIO
Item No. ……….…….VIDEO
Adjust Data ….…….ADJUST
Save Data …. ………ENTER
Exit …………..MENU (twice)

 

Activate …….. MENU-0-1-5-7
Function …...………..AUDIO
Item No. ……….…….VIDEO
Adjust Data ….…….ADJUST
Save Data …. ………ENTER
Exit …………..MENU (twice)