Electrical Adjustments; Q Q - Sony LDI-D100B Service Manual

QQ
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Precautions on adjustment:
1. Perform the adjustment in the given order.
2. Power supply voltage: DC 8.4 V
3. Equipment required
Electrical adjustment requires the following measuring equip-
ment.
(1) Oscilloscope: 2 phenomena, band 30 MHz or more, with de-
lay mode (use 10 : 1 probe unless otherwise specified)
(2) Pattern generator
(3) Regulated power supply
(4) Digital voltmeter
(5) Frequency counter
(6) Connector for adjustment
(7) Kent paper (for Power Saving Sensor adjustment)
4. Measurement points for adjustment are located at CN1003 on
the YC-148 (H) board and at CN206 on the MA-324 (H) board.
The pin No. and signal name of CN1003 and CN206 are listed
below.
• YC-148 (H) board, CN1003
Pin No. Signal Name
1 GND
2 GND
3 GND
4 4FSC
5 GND
• MA-324 (H) board, CN206
Pin No. Signal Name
TE
L 13942296513
1 SIG R 1
2 A
3 SIG G 1
4 POWER SW
5 SIG B 1
6 ENTER
7 INT H
8 VIDEO/XPC IN
Preparation:
Connect electrical blocks as shown below.
pattern
generator
S-VIDEO jack
JK-136 (H) board
(J1401)
DC 8.4V
DC IN 8.4 V jack
DD-107 (H) board
(J701)
www
Extension cable
Adjusting Remote
(J-6082-291-A)
Commander
RM-95
(J-6082-053-B)
.
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SECTION 3

ELECTRICAL ADJUSTMENTS

Pin No. Signal Name
6 GND
7 Y OUT
8 VIDEO G
9 N.C
10 GND
Pin No. Signal Name
9 GND
10 GND
11 B
12 COM R
13 C
14 COM L
15 SIG CEN
16 P SIG B
RGB terminal
MA-324 (H) board
(J101)
Set PC
MA-324 (H) board
CN501
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5. Setting up Input Signals
(1) Video Signal
In adjusting this set, video signals obtained from the pattern
generator are used, and therefore these video output signals
must satisfy the specification. Connect the oscilloscope to the
VIDEO IN terminal, and confirm that the sync signal ampli-
tude of video signals is approximately 286 mV, the amplitude
of video part is approximately 714 mV, burst signal amplitude
is approximately 286 mV and flat, and the level ratio of burst
signal to "red" signal is 0.30 : 0.705.
• When color bar signals are entered
White (75%)
±
535 3 mV
±
286 3 mV
Pedestal
Horizontal sync signal
Fig. 3-1. Pattern generator's color bar signals
(2) PC Signal (RGB signal)
H

Q Q

Signal mode
3 6 7 1 3 1 5
(kHz)
PC98 24.82
VGA-TEXT 31.47
VGA-GRAP 31.47
VGA72 37.86
VGA75 37.50
MAC13' 35.00
VGA85 43.27
SVGA56 35.16
SVGA60 37.88
SVGA72 48.08
SVGA75 46.88
SVGA85 53.68
MAC16' 49.73
XGA60 48.36
co
.
9 4 2 8
White (100%)
±
714 3 mV
±
286 3 mV
Black
Red
±
Burst signal
672 3 mV
(to be flat)
V HDISP VDISP
0 5 8 2 9 9 4 2 8
(Hz) (dots) (dots)
56.41 640 400
70.08 640 362
59.94 640 480
72.82 640 480
74.99 640 480
66.67 640 480
85.01 640 480
56.26 800 600
60.32 800 600
72.19 800 600
75.01 800 600
85.07 800 600
74.55 832 624
59.99 1024 768
m
9 9
9 9