Circuit Adjustments; A Board Adjustments - Sony PVM-20M2U Service Manual

SECTION 5
CIRCUIT ADJUSTMENTS
5-1. A BOARD ADJUSTMENT
LJ09
[eJ
J2 17
TP306
0
CJIC3o5
I
16
TPJOI
TP307
0
OTP305
0
1
CNJOI 11
11.
PREPARATION/SIGNAL SPECIFICATIONS I
1. Signal specifications
• Supply a composite video or component signals from the CN30 l
connector. Refer to Table 5-l to take into consideration the ef-
fect on the
Q
board.
The level of the signal to supply should equal to values shown in
Table 5-1 plus/minus 2% max.
Table 5-1
Standard Reduction Connector
Signal
Details ofsignal
level
rate
supply
(Pedestal level
white)
.,..
(PW)
100%white
0.714V 93% 0.664V
75%white 0.536V # 0.498V
358NT }
Composite 443NT
Burst
video
(Green section) 286mV 94% 269mV
(P-P for1his
(632mV) (94%) (594mV)
(75%color
item only)
bar)
100% white 0.7V # 0.651V
PAL
75"1owhite 0.525V " 0.488V
SECAM} PAL burst
PALM (Green section) 300mV
94%
282mV
(P-P lor this
(664mV) (94%) (624mV)
item only)
100"1owhite 0.7V
94.8%
0.664V
BETAO
75"1owhite
0.525
#
0.498V
75%color
B-Y, A-Y
Compo- (P-P lor this 0.7V # 0.664V
nent
item only)
(75% color
100"1owhite 0.7V
#
0.664V
bar)
75"1owhite 0.525V
#
0.498V
SMPTE
75% color
B-Y, A-Y
0.525
#
0.498V
(P-P lor this
item only)
OTPJOO
1
CN401
8
[==:J
TP402
0
zz
IC507
rz
C/6)!J
C:1==l
IC50J
e:r
I
8
IC502
16 •
L=:J
I
8
2. Preparation
RV501
~
• In this chapter,
D
indicates the control items in the service
mode.
Example:
160 H-PRQI
Write the applicable model data at the location of NO.ll4
MODEL in the service mode.
Group of models 4 ... 0
Group of models
5 ...
l
Group of models 1 ...
5
Group of models 2 ... 6
Group of models 3 ...
8
• Refer to Table 5-2 for the following groups of models.
Table 5-2
Group of
Models
models
1
PVM-14M4U PVM-14M4J PVM-14M4E
PVM-14M4A
2 PVM-14M2U PVM-14M2E PVM-14M2A
3
PVM-14M1J
4
PVM-20M4U
PVM-20M4J PVM-20M4E
PVM-20M4A
5
PVM-20M2U PVM-20M2E
• CONT 80% is the center click position of the user controller.
I2.ADJUSTMENT OF DEFLECTION
SYSl~~
1. Adjustment of horizontal oscillation frequmcy
1. Input a 525 monoscope signal.
2. CONT ... 80%
BRT .... 50%
3. Set the unit in the service mode.
-27-