Slow Tracking Adj; V-Lock Adj; Auto Tracking Gain Adj; Doc Balance Adj - Panasonic AG-MD830E Service Manual

4-3-3. SLOW TRACKING ADJ.
BOARD SERVO
&
SYSTEM CONTROL C.B.A.
TP VIDEO OUT
ADJ FWD: VR2005(A·3), REV: VR2006(A·3}
TAPE
COLOUR BAR SIGNAL RECORDED TAPE
INPUT
MODE SLOW PLAY BACK
M.EQ MONITOR TV
SPEC
NO NOISE BAR
Note: This adjustment should be performed only
after completion of 4-3-2. SLOW FREE RUN
adj.
1. Record the colour bar signal for a few minutes.
2. Playback the recorded portion in still mode.
3. Push the tracking button
"+"
and "_" at same time.
4. Adjust VR2005 and VR2006 so that the noise bar
dose not appear and lower on the monitor
TV.
4-3-4. V-LOCK ADJ.
BOARD
SERVO
&
SYSTEM CONTROL C.B.A.
TP VIDEO OUT
ADJ
VR2004(A·3)
TAPE
BLANK TAPE
INPUT COLOUR BAR
MODE STILL
M.EQ MONITOR TV
SPEC NO V-DANCING
Note:
This adjustment should be performed only
after completion of 4-3-3. SLOW TRACKING
Adj.
1 . Record the colour bar signal for a few minutes.
2. Playback the recorded portion in still mode.
3. Adjust VR2004 so that the V-dancing dose not
appear and lower on the monitor
TV.
4-3-5. AUTO TRACKING GAIN ADJ.
BOARD
VIDEO 1 C.B.A.
TP TP3005(D·3)
ADJ VR3005(C·2)
TAPE
INPUT
SINE WAVE (4MHz, 200mVp·p)
MODE E·E
M.EQ OSCILLOSCOPE
SPEC 2.5V
±
O.1V
[SET
UP]
S-VHS: OFF
INPUT: LINE
1. Set the sinewave generator output to 4MHz,
200mVp-p.
2. Supply the sinewave signal to TP3006.
3. Connect the oscilloscope to TP3005.
4. Adjust VR3005 so that the level is 2.5V
±
0.1 V.
4-3-6. DOC BALANCE ADJ.
BOARD VIDEO 1
TP
TP3001 (B· 1)
ADJ VR3001 (E· 1 )
TAPE
INPUT COLOUR BAR SIGNAL
MODE
E·E
M.EQ OSCILLOSCOPE
SPEC
LESS THAN 50mVp·p
1. Supply the colour bar signal to video input.
2. Connect the oscilloscope to TP3001.
3. Adjust VR3001 so that the video level becomes
minimum as much as possible (Figure E2).
TP3001
(H.RATE)
if
MINIMUM
Figure E2
4-3
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