Circuit Adjustment; Picture Distortion Adjustment - Sony Trinitron Multiscan CPD-1302 Service Manual

, VCC Adjustment ( R416)
I
Preparations:
1. Set the switch on the set rear panel (H board)
to NOR- DIG.
2. Input a 21.8 kHz TTL RGB, H.V separate
SYNC signal from a microcomputer.
1. VCC MAX Adjustment
(1) Connect a digital muitime,ter between BA-l
connector VCC and GND, and set VCC to
maximum with +B ADJ VR (RV403).
(2) Confirm that the voltage is lower than that spe-
cified at each of the following frequencies. If
not, adjust with R416.
Frequency Specified voltage
15.734 kHz (less than) 62.0 V
18.4 kHz 72.8 V
21.8 kHz 86.0 V
26.0 kHz 97.8 V
31.5 kHz 124.5V
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Switch position
2. VCC Adjustment
(1) Adjust for the following voltage values when
the corresponding frequency is input.
Frequency Specified voltage
15.734 kHz 57.5+2.0 V
-1.5 V
31.5 kHz 115.0
+
1.5V
-2.0 V
BA BOARD
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R489
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R 4 16
R~03
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BA-l
- 9 -
R339
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CJ BA-14
CPD-1302 CPD-1302
SECTION 3
CIRCUIT ADJUSTMENTS
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1. Preparations
(1) LIN rough adjustment
Adjust top and bottom balance with V.LIN
(1) for a 21.8 kHz signal. Balance center
and top and bottom with V. LIN (2).
2. Brighten the background with the screen VR
and adjust H. CENT (RV506) and V.CENT
(RV502) so that the background shown in the
figure is at the center of the effective picture.
Note: Ignore raster blanking portion at this
time.
13-2. PICTURE DISTORTION ADJUSTMENT
I
1. Picture distortion adjustment
Input a signal equivalent to a crosshatch signal.
(TTL H.Y. separate SYNC signal)
PIN PHASE
loHOI
(RV570)
PIN AMP
Ic=JHOI
(RV504)
loHCSI
SUB PIN
(RV503)
TOPPIN
Il~HCLI
(RV580)
V. LIN (1)
I~HiiJl
(RV301)
I~H~I
V. LIN (2)
(RV302)
2. Picture Size
10 -
Input a TTL H.V. separate SYNC signal.
1. SIZE Adjustment
(1)
Adjust picture to about 182mm with
V. SIZE on the set rear panel.
(2) Set H. SIZE to maximum and adjust to
about 244mm with D board H. SUB SIZE
VR (RV505).
(3) Adjust to about 240mm with H. SIZE.
D BOARD
BA BOARD
' - -
e RV302
oRV301
RV5060
RV5030
RV5700
RV5040
RV580 0
RV5020
(