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MultiSync FP1350
Page 147 (17 Usb Circuit Failure)
NEC MultiSync FP1350 - 17 Usb Circuit Failure
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7-35
17. USB CIRCU
IT FAILURE
NG
OK
USB func
tion don’t
operate.
Check
the followin
g parts
Q851, Q852, Z
D854, R8
55, R857, R8
5N, R85P
Check
the voltage
of IC851 pi
n27 outputs
5V.
IC851 failur
e
146
148
Table of Contents
Main Page
Table of Contents
4
Service Manual
1
Specifications
5
User's Manual
6
Quick Start
7
Recommended Use
14
Troubleshooting
19
Serial Number Information
20
Assembly
21
Video Pwb Assy
30
Clamper, Wire
30
Clamper, Wire
31
Clamper, Wire
32
Def Pwb Assy
36
Table of Contents
40
Adjustment Procedures
42
Inspection
42
Adjustment Items
53
Signal Cable
69
Printer Cable
69
Trouble Shooting
113
1 No Raster
114
2 ABNORMAL VIDEO on CRT SCREEN (too Dark or too Bright)
116
3 Unstable Picture
120
4 On Screen Manager (Osm) Failure
122
5 Abnormal Picture
123
5-3.Horizontal Position
125
5-4.Vertical Position
126
5-5.Poor Linearity
126
5-6.Distortion Correction Circuit
127
5-7.Poor Focus
128
5-8.Impurity on CRT Screen
129
6 H Osc / Def / Hv Circuit Failure
132
7 Osc / Def Circuit Failure
135
8 Self Test Error
136
9 Raster Centering Circuit Failure
137
10 Raster Rotation Error
137
11 Power Management System (Pms) Failure
138
PMS FAILURE 1(When a Monitor Receives Horizontal and Vertical Sync.)
138
PMS FAILURE 2(When a Monitor Receives no Horizontal Sync)
139
PMS FAILURE 3(When a Monitor Receives no Vertical Sync)
139
PMS FAILURE 4(When Monitor Receives Neither Horizontal nor Vertical Sync)
139
12 Digital Control Circuit Failure
140
Digital Control Error
141
User Control Error
141
DAC Output Error
141
13 Switching Regulator Circuit Failure
142
14 Moire Cancel Failure
144
15 Plug & Play Failure
145
DDC 1 Failure
145
DDC 2B Failure
145
16 OUT of Cg-SPECIFICATION
146
17 Usb Circuit Failure
147
18 Auto Adjust Circuit Failure
148
Circuit Description
149
Video Circuit
151
Selection of BNC/D-SUB Input
151
Video Signal Amplification Section
152
Video Bias Circuit
153
ABL Circuit
153
On Screen Manager (OSM)
154
Self Test
154
Deflection Circuit
155
The Oscillation and Deflection Control Integrated Circuit
155
1Bit D/A Converter (1Bit DAC)
155
Digital Signal Processor (DSP)
155
Horizontal Deflection Circuit
156
Horizontal Oscillation Circuit and Horizontal Position Control Circuit
156
Distortion Correction Circuit
157
Horizontal Deflection Output Circuit
159
Horizontal Drive Circuit
159
Horizontal Size Control Circuit
159
H Centering Circuit
161
Rotation Correction Circuit
161
Vertical Defrection Circuit
162
Sawtooth Wave Generating, Vertical Size and Position Control and Linearity Control Circuits
162
Vertical Filter Circuit
162
Vertical Output Amplifier Circuit
162
High Voltage Circuit
164
High Voltage Control Circuit
164
High Voltage Output Circuit
164
High Voltage Protector Circuit
164
Blanking Circuit
166
Spot Killer Circuit
166
Auto Adjust Blanking Circuit
166
Dynamic Focus Circuit
167
The Horizontal Parabolic Wave Generation and Gain Control Circuit
167
The Vertical Parabolic Wave Generation and Gain Control Circuit
167
The Output Amplifier Circuit and the Coupling Circuit
167
Cpu Circuit
169
Cpu
169
DC Control Circuit
171
Power Management System (PMS) Circuit
172
Plug and Play (DDC 1 / 2)
173
User Control Operation
174
Change DATA Value
177
Save DATA Value to Memory
178
Open SUB MENU
178
Turn off OMS MENU
178
Open MENU(S)
179
OSM MENU Structure
180
Moire Canceller
188
Switching Regulator Circuit
189
Rectifying and Smoothing Circuit
189
Auxiliary Power Supply Circuit
189
Converter Circuit
190
Output Rectifying and Smoothing Circuit
191
Error Detection Amplifier Circuit
192
Over Voltage Protection
192
Degaussing Circuit
193
Posistor's Automatic Selective Circuit
193
Over Current Protection
195
Power Management System Circuit
196
Power Factor Controller Circuit
197
Dynamic Convergence Correction Circuit
199
AUTO and MANUAL PURITY CORRECTION (GLOBALSYNC) CIRCUIT
201
Sensor Part
201
Purity Correction Part
203
Usb Circuit
204
Auto Adjust Circuit
205
Replacement Parts List
206
Cabinet Back
215
Chassis Base
215
Control Panel
215
Cushion Sheet
215
Push Button(Control)
215
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