Adjusting Connectors; Connecting The Equipment; Checking The Input Signals - Sony DCR-PC100 Service Manual

3-1-3.

Adjusting Connectors

Some of the adjusting points of the video section are concentrated
at VC-227 board CN2903. Connect the measuring instruments via
the CPC-8 jig (J-6082-388-A). The following table lists the pin
numbers and signal names of CN2903
Pin No. Signal Name
1 LACN SIG
3 NC
5 EVF VCO
7 PD VG
9 H START
11 PANEL COM
13 TCK
15 TDO
17 SWP
19 GND
3-1-4.

Connecting the Equipment

Connect the measuring instruments as shown in Fig. 5-3-2, and
perform the adjustments.
VTR recording mode
Pattern generator
Video output
(75 Ω )
Playback mode
3-1-5.

Checking the Input Signals

Because the video signal obtained from the pattern generator is used
as the adjustment signal for adjusting the VTR section, the video
output signal must satisfy the given specifications.
Connect the oscilloscope to the video terminal of the AUDIO/
VIDEO jack, and check that the sync signal amplitude of the video
signal is approximately <0.286V> [0.30V], the amplitude of the
video section is approximately <0.714> [0.70V], the amplitude of
the burst signal is approximately <0.286> [0.30V] and flat, and that
the level ratio of the burst signal to the "red" signal is 0.30 : 0.60.
The video signal used for adjusting the video section is shown in
Fig. 5-3-3.
< > : NTSC model
[ ] : PAL model
Pin No. Signal Name
2 NC
4 EVF VG
6 GND
8 PD VCO
10 XHD/PSIG
12 TMS
14 TDI
16 GND
18 RF IN/LANC JACK IN
20 RF MON
VIDEO
(Yellow)
AUDIO L
(White)
AUDIO R
(Red)
AUDIO/VIDEO jack
Adjustment
remote
commander
LANC jack
Fig. 5-3-2.
Remove the CPC lid.
Adjustment
remote
commander
Main unit
LANC jack
VIDEO
(Yellow)
Main unit
AUDIO L (White)
AUDIO R (Red)
AUDIO/VIDEO jack
5-40
CN2903
20
2
Fig. 5-3-1.
TV monitor
19
1