Pal Hi-Fi Audio Head Switching Shifter Adjustment; Ntsc Hi-Fi Audio Carrier Frequency Adjustment; Pal Hi-Fi Audio Carrier Frequency Adjustment - Panasonic AG-7350 Series Service Manual

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5-3-52. NTSC Hi-Fi AUDIO HEAD SWITCHING
SHIFER ADJUSTMENT
TP ADJ. MODE INPUT
TP4706 (H SW)
NTSC
X
TP4705 or VR4708
PLAY
TP4707
TAPE
M. EQ.
SPEC.
VFM8080HQFP
OSCILLO-
NO HEAD SWITCHING GAP
PORTION: 2
SCOPE
1. Set the TV System switch to the NTSC position.
2. Play back the NTSC alignment tape at the
portion 2.
3. Connect the oscilloscope CH 1 to TP4706 and CH2
to TP4705 or TP4707.
4. Adjust VR4708 so that the head switching gap
is not occured as shown in Figure E48.
5. Turn the tracking VR on the front panel from
CCW position to CW position and confirm that
the head switching gap is not occured.
I
I
TP4706
AUDIO H. SW
I
I
I
I
TP4705 OR TP4707
~
/
FM ENVELOPE
NO~GAP
Figure E48
5-3-53. PAL Hi-Fi AUDIO HEAD SWITCHING
SHIFTER ADJUSTMENT
TP ADJ. MODE
INPUT
TP4706 (H SW)
PAL
X
TP4705 or
VR4707
PLAY
TP4707
TAPE M. EQ.
SPEC.
VFM8180HADH OSCILLO-
NO HEAD SWITCHING GAP
POSITON 2 SCOPE
This adjustment should be always compleded
after NTSC Hi-Fi audio head switching shifter
adjustment.
1. Set the TV system switch to the PAL position.
2. Play back the alignment tape at portion 2.
3. Connect the oscilloscope CH 1 to TP4706 and CH2
to TP4705 or TP4707.
4. Adjust VR4707 so that the head switching gap
is not occured as shown in Figure E49.
5. Turn the tracking VR on the front panel from
CCW position to CW position and confirm that
the head switching gap is not occured.
5-20
TP4706
AUDIO H. SW
TP4705 OR TP4707
FM ENVELOPE
NO HEAD SW GAP
Figure E49
5-3-54. NTSC Hi-Fi AUDIO CARRIER
FREQUENCY ADJUSTMENT
TP ADJ. MODE INPUT
TP4704 VR4703 NTSC
X
TP4708
VR4711 STOP
TAPE M. EQ. SPEC.
BLANK FREQUENCY 1.3MHz +/- 10kHz(CH1)
TAPE
COUNTER
1.7MHz +/- 10kHz(CH2)
1. Make a short circuit between both Hi -Fi audio
Inputs (CH1 & CH2) and GND.
2. Set the TV system switch to the NTSC position.
3. Connect the frequency counter to TP4704 (CH 1)
or TP4708 (CH2).
4. Adjust VR4703 (CH 1) or VR4711 (CH2) so that
the reading of frequency counter is 1.3MHz
+/-10KHz for CH1 and 1.7KHz +/-10KHz for
CH2.
5-3-55. PAL Hi-Fi AUDIO CARRIER FREQUENCY
ADJUSTMENT
TP ADJ. MODE INPUT
TP4704 VR4705 PAL
X
TP4708 VR4710 STOP
TAPE
M. EQ. SPEC.
BLANK FREQUENCY
1.3MHz +/- 10kHz(CH1)
TAPE
COUNTER 1.7MHz +/- 10kHz(CH2)
1. Make a short circuit between both Hi-Fi audio
inputs (CH1
&
CH2) and GND.
2. Set the TV system switch to the PAL position.
3. Connect the frequency counter to TP4704 (CH 1),
TP4708 (CH2).
4. Adjust VR4705 (CH 1) or VR471 0 (CH2) so that
the reading of frequency counter is 1.3MHz +/-
10kHz for CH1 and 1.7kHz +/-10kHz for CH2.