Reference Pll Center Frequency Adjustment (1); Reference Cf Detection Adjustment (1) - Panasonic DVCPRO50 Service Manual

<Preparation>
1. Before starting this section, it needs aging more
than 15 minutes.
2. Set menu setting of SYSTEM menu as follows.
Before that, note the current setting, and after
finishing all adjustment of this section, set to the
original (current) setting.
00 WFM SEL
10 ENCODER SEL
11 SYS SC COAR.
12 SYS SC FINE
13 SYS H
14 SCH COARSE
15 SCH FINE
16 AV PHASE
18 SYS H OFFSET
19 SYS SC/H
22 VIDEO LEVEL
23 SET UP LEVEL
24 CHROMA PHASE :
25 CHROMA LEVEL :
30 MENU LOCK
3. Set menu setting of SETUP menu as follows.
070 TV SYSTEM
614 PB/PR OUT LV :
623 SETUP 50 / 622 SETUP 25
00 CMPST IN
01 CMPST OUT
02 CMPNT IN
03 CMPNT OUT
4. Set menu setting of SERVICE menu as follows.
F00 VIDEO ADJUST
F11 V SETUP
4-2. Reference PLL Center
Frequency Adjustment (1)
BOARD
V OUT (F5)
TP
TP153 (VCO)[F-2]
ADJ.
VC701 (FREQ ADJ M)[E-2]
TAPE
-----
INPUT
Internal SG (CB100)
MODE
-----
M. EQ
Frequency Counter
14.318180MHz ±10Hz
SPEC.
1. Disconnect the REF IN terminal. (No reference
signal)
2. Connect the frequency counter to TP153.
3. Adjust VC701 so that the frequency at the TP153
is in the specification.
<Note>
When the hand and so on approach too much near
VC701 in adjustment, the DC voltage sometimes
shifts.
After finishing this adjustment, connect REF IN
terminal again for next adjustment.
: 0002 VIDEO
: 0001 LOCAL
: 0000 0
: 0128 0
: 0128 0
: 0000 0
: 0032 0
: 0128 0
: 0003 0
: 0000 REMOTE
: 0128 0
: 0128 0
0128 0
0128 0
: 0000 OFF
: 525(Only AJ-SD955A)
B-CAM
: THRU
: THRU
: THRU
: THRU
: ON
4-3. Reference CF Detection
Adjustment (1)
BOARD
V OUT (F5)
TP
CF OUT of Composite Signal generator
TP804(CF)[B-2], TP802(CF TP2)[A-1],
TP803(CF TP1)[A-1]
ADJ.
VR600 (CF ADJ M)
TAPE
-----
INPUT
REF VIDEO IN
Internal SG (CB75)
MODE
-----
M. EQ
Oscilloscope
See Figure, A=B ± 5%
SPEC.
1. Connect the oscilloscope CH1 to the CF output of
composite signal generator and CH2 to TP804.
2. Set VR600 to fully counterclockwise.
3. Turn it to clockwise slowly until the phase is
reversed as shown in figure.
And confirm that the "SCH" lamp on the front
panel is turned on.
The waveform will be
Changed depending on SG.
Trigger
CF OUT
TP804
Fully
Counterclockwise
Turn clockwise
slowly
4. Connect the oscilloscope CH1 to TP802 and CH2
to TP803.
5. Expand (delay) the rising edge of TP802.
6. Slowly and slightly rotate VR600 so that the rising
edge of TP802 is positioned at the center of
cross point between A and B of waveform at
TP803.
TP802
(5Vp-p)
TP803
(5Vp-p)
TP802
(5Vp-p)
TP803
(5Vp-p)
ELE-22
Trigger
Expansion
A B
A=B ± 5%