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MultiSync V920
NEC MultiSync V920 User Manual
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19
1.
DC P/S O/P VOL
T
AGE SET A
T 17
V
,CURRENT SET
A
T 200MA. POSITIVE CONNECT TO C109”+”.
NEGA
TIVE CONNE
CT TO C105”-“.
2.
SCOPE SET A
T 10V/DIV
, 10US/DIV
, PROBE
CONNECT TO Q
101-GA
TE AND C105”-“.
POWER SW
TURN OFF
CHECK
F101
CHECK
Q101
CHECK
U101
U101 PIN6
PULSE O/
P
POWER SW
TURN ON
F
AILURE
R
111
,
Z
D
1
0
3
CHECK
U101 PIN 7 VCC
PIN 4 SAWTOOTH
NO
2. NO OPERATION, POWER LED OFF
21
23
Table of Contents
Table of Contents
3
Service Manual
1
Specifications
4
Controls
5
Serial Number Information
7
Disassembly
8
Adjustment Specifications
9
Adjustment Tools
10
B+ Adjustment
10
Definition for Normal Condition
10
Timing Table
10
Adjustment
11
Free Run Adjustment
11
G2 Voltage Adjustment(Raster Brightness Adjustment)
11
H-Center Adjustment
11
H-Size Adjustment
11
Mode 11 Pre-Adjustment
11
X-Ray Test
11
Automatically Adjust
12
Convergence Adjust
12
Focus Adjust
12
White Balance Adjustment
12
White Balance Check and ABL Adjust
12
DCC 1/2B Test
13
Power Saving Test
13
Timing Table
14
Pnp Communication
17
Construction of System
17
EDID Write and Inspection Method
17
EDID Data File
18
Trouble Shooting
20
No Operation, Power Led Flash
21
No Operation, Power Led off
22
Video Noise, Unsynchronous
23
No Video
24
No Raster
25
Trouble in H.V Sync
26
Pincushion Poor
27
Focus Poor
28
N9902 Theory of Circuit Operation
29
Theory of Circuit Description
29
Micro Controller System
30
Power Supply
30
Video Circuit & OSD
30
Horizontal Deflection
31
Vertical Deflection
31
FBT Secondary & Dynamic Focus
32
Multisync V920
33
Replacement Parts List
33
Multisync V921-1
56
Multisync 95
58
Accusync 90
60
Accusync 90M
62
Block Diagram
65
Schematic
66
Video Board
66
Main Board
67
4
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NEC MultiSync V920 Specifications
General
Brand
NEC
Model
MultiSync V920
Category
Monitor
Language
English
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