2793-Vga Main Board Schematic - Ceronix 1493 Service Manual

AA BB CC
VIDEO BOARD
Beam current
Red Video Amp.
Feedback 800
Beam current
0
Green Video Amp. M46QCY261X112
Feedback
Beam current
Blue Video Amp.
Feedback
ARC PROTECT
B+G+R=∑
Beam
Current
Auto Bias
Auto
Buffer
V ABA Bright
Sync
1
TC7 Red TC 10 TC 6 SOCKET BOARD CONNECTOR (TC) 206
TC5 Green
TC 3 Blue
0Ω
+12
V 088
62K 6.8K
098 099
PN2222 510Ω
1
PN2222
2
006
3
100B
379
200K
0Ω
2
CS=.45"
CS=.74 5
383
389 0Ω
22K
100A
10
384
GND
Retrace Boost
+12V
6.8K
6.8K
VERTICAL BLANKING
251
6 250 0Ω
PN2907A
8 2-3VDC
1/2 1N4148
3 7 211 2
2.3-
4Vpp 64,C4
LM393
2.7V
253 1/2
5 1
+
212 LM393
210
1.8K
3
210
+
4-7VDC Hs 4.5-5.3V
1K 4 368
1.8K
4-9Vpp 61,B4 5Vpp 16,E5
NO 208
248
1.8K
PART .047uF
HORIZONTAL 252
077
BLANKING 207
GND GND
PN2222A (CPQ1322)
.015uF
2.15K 270Ω
0VDC Hs
4 078 093
081
56Vpp 63,D6
1N4937
072
080
GND
VIDEO GAIN LINE
S T U 604Ω
FDH400
076
412Ω 105Ω 604Ω
084
4-7VDC Vs
260 244 245
5-9Vpp 62,B4
FDH400
909Ω
086 464Ω
064
5 258
+12V
11.5-12.5V +12V
FDH400
GND
213 0Ω 0Ω
15.8K
228
261 293
G
+
16 13 9 6 11 10 3
5 12 12V
VC
R G B A +12V A TTL M
o o o + EN - BL GAIN
0
B
BL
Controls XRC5346A 241
4
GND
6
R R G G B
IN R IN R IN B R
2 1 14 15 7 8
A5 B5 A5
2.2Ω 4.7Ω 2.2Ω
J K L
225 243 233
64.9Ω 0Ω 69.8Ω
57.6Ω
218
226 264 232
7
0Ω 0Ω 0Ω
236 235 266
1N4148 1N4148
1N4148
75Ω 75Ω 75Ω
278 271 277 270 276 268
8
1.8K
0Ω 0Ω 0Ω
325
281 280 283
0Ω
75Ω 75Ω 75Ω
328
286 284
288
1.8K
331
9
GND GND
R CPS G B
GND V s H
s
1752
VC VC VC VERTICAL HORIZONTAL
RED VC GREEN BLUE VC VC
4 3 292 5 6 2 1
INPUT INPUT INPUT SYNC SYNC
AA BB CC
24
DD EE FF GG
Product safety note: Components marked by the symbol on this schematic have special characteristics important to safety.
When replacing any of these components, be sure to use the parts specified in the parts list.
Samsung
CRT LA7838
Ramp
HEAT
Reset
SINK Vertical
One Shot
378 Deflection
out
377
Tr.
R/C
+12V
+12V
127V TC8 Horizontal
Size 10K
1 2 3
481
RC5 GND
5.5-6.4V
510Ω
3Vpp 21,D5
RC8
004
Vertical
500Ω 0Ω 62K
RC6
Size
1N4007
482 203 375
090
750Ω 1,000pF
28.0K
68.1K Vertical
Raster 486 402
369
085 1K
Position
100uF
483
RC3
RC
+
002
089 68.1K
403
127K
Horizontal 20K
RC7
Position
087
484
+12V
GND
100uF
+12V
Master
209
Gain 1K
RC2 Vs
485
GND
5.5-6.5V
100uF
1.2Vpp 19,D5
+
Remote Control
or
376 11-12.4V
PCB 490
2.15K
20, D5
062 20
RC4 RC1
0Ω 0Ω
+16V 18Ω VERTICAL
V+
367
Vs ± SYNC INPUT
067 295
1N4007
Horizontal
+12V
OUT IN
333
SYNC INPUT
7812
Vs
+ 0Ω
+ 1
100uF GND 296 220uF 2 2.7K 8
304 298
I4
202
17 5
POS
12K
7
Hs
56pF
12.1K 1.8K I2
Hs 3
IA
7.3VDC Hs
329 I1
352
5.5Vpp 01,D6 220uF 22K 8.8K
I3 I12
Vs
334 GND
18Ω
H. S. +12V
063
+127V
FBP
GND
+16V
+6V
+ I BEAM
1K
10uF
MPSA64 014 15.8K
012
PN2222A
020
7-10VDC
CPQ1322 D
1N4148 61, C2
036
018
071
CPR0432
100uF
Beam Current 100kΩ@25˚C
75Ω 1K
T
180
267 Limiter Circuit.
066 065
GND
FBP
+12V
9
7.15K + 15.8K 68.1K 15.8K
1/4
14
366 7.15K 353 354 360
LM339
8 2.1-2.4VDC Hs
364
355
4.6Vpp 59,D6
1K
1.5-2VDC 60,D6
357
11
+
13 1/4 3.3nF
LM339
358
10 2.2nF
355
+12V
3.92K 2.7K
150
356
FR205
200K
.05VDC Vs,Hs
PN2222 3.92K
246 7V pp 58,C5 148
272
2.2nF-230V
PN2222
152
274
FR205
30Ω 412Ω
255 230V
275 273
GND
PN2222 151
100K
6.8K
+12V 257
.047uF
321 200K
22K
M & N reverse Hs.
254
OPEN 0Ω
323
6.8K 318 256
M
33K
4 3 152
322
247
1/4 2 GND 2.2nF
N
270Ω LM339
5
326 +24V 155
+
355 Inrush Current Limit
470Ω, 1/2W FR205
6
M
CC
470
159
270Ω 1/4 1
N 25Ω@25˚C, 2A 156
Relay
LM339
330
2.2nF-230V
7 355 200V.5A
+
12
CPR0434
3A Fuse
.14-.16V
153
468 146
270Ω
Black Wire. FR205
230V
327
GND
158
154
.093" pins 145
.093" pin Degaussing
PC PC
230VAC 120VAC
Connector
162A 2 1
INPUT
162 161
DD EE FF GG
HH II JJ
Thermal Protection Vertical Linearity Circuit
out
Ramp
Vert. Vert.
Gen.
Drive Out DECREASES
200K
V. size Retrace TOP AND
Reset
Control Booster BOTTOM 412
Ramp
VERT. SIZE.
50/60Hz
Slope Boost
Drive
+16V
GND
I
4 5 6 7 8 9 10 11 12 13
D5
Vs 100pF
5.5-6.5V Vs
200K
5-6VDC Vs 398
1.4Vpp 23,F4
1.4Vpp 22,E5 371
1N4007 0Ω
PN2222
470uF
3.3nF 196 382 395
100K
411
382 380
84.5K 381A
.01uF 1.5-2.7V Vs
1uF
4.7Ω
1N4148
393 24Vpp 24,E4
401 100K 68.1K
374 2.7K 396
390 406 407
392 .1uF
GND
397
1uF
127K
1.2Ω, 1W
391
388
385
GND
NO
22K
2.2M 127K
PART .01uF
370
362 363 361 414
.1uF
.4VDC Hs
Vs 410 .7Vpp 12,E5
.1-.3VCD Vs 4.5-5.3V Vs
4-6VDC Vs
V 15.8K
3.8Vpp 17,E5 5Vpp 16,E5
VERT. 2.8Vpp 18,D5
V. osc.
408
OSC.
ADJ.
19 18 17 16 15 14 13 12
GND
VERTICAL VERTICAL VERTICAL X-RAY
OSCILLATOR V Ref. PROTECT
OSC. O/S
PICTURE DELAYED
LA7851 HORIZONTAL
MULTIPLIER
POSITION SYNC O/S SAW TOOTH
OSCILLATOR DISCHARGE
O/S TR . GENERATOR BIAS
2 3 4 5 6 7 8
7.3-8.7V Hs 7.3-8.7V Vs -.2VDC Hs 3-4VDC Hs 2.4-3.4VDC 3-7VDC Hs 5.5-6.3V Hs
4Vpp 02,D6 4Vpp 03,D6 1.5Vpp 04,E6 1.4Vpp 05,E6 0Vpp 06,E6 .2Vpp 07,E6 3.6Vpp 08,E6
330pF
+
11 14
6.8K 1uF 1K
10K 33K 15
9 13
347
330pF I13
18 I9 9.31K
I7 I8
25K 330pF
3.3nF
45K
1uF .01uF
351 I5 350 3.3nF
348 I10 + 1600Hz
I6 +
6,10 1 344 346 345
GND
H. +12V
I PRA
100K 62K 416
173 167A
Video V+
FBP
GND
+6V
I BEAM
+55V
V+
101.6K 220uF
+ 0Ω
JA JB 100uF 100uF
-0.30V -1.60V 100V
J18
198A
JE + +
120 118 182
+16V
2.33K 4.67K 20
+44V +61V +127V
+
91.4K J13 J14 220uF
1,000uF
250V
J1 1N4937 1N4937 1N4937
171
175
121 122 167
1 2SA1371E BZT03-D160
100K 181 160Vz
GND 1
191K
113
2
529
112
+55V
8
16.3-19VDC 55, E1
0Ω
5
114A 1
6 6.5-7.5VDC
16
14.8-18VDC
41,D1 +15V
INPUT
10.6K
0Ω 30Ω 1N4937
15
1,000pF 9
J5 +17V
ERROR
110 INPUT
AMP. 132 139
JD 141
12
260Ω
3
+1.30V
2
5 6.5-7.5VDC
J16
INPUT
JC
88K
130Ω 3 Over
.5-.8VDC
+0.70V J4 COMP. 14
Voltage 5.5-6.8VDC
}
J15
4
Protect
16
3.3nF 56pF
INPUT
.1uF
11K
107
108
4 124
J2 Output
3.4-4.2VDC V-
2
23.2K 20
3-5VDC
56pF
CONTROL &
5Vpp 52,F1
1.00M 1.00M
J3
FAULT SENSE
.1-.5VDC
12 J10 134
104
5
4uS
COMP. 17 18
8.06K 28.0K 13
DELAY 3-6VDC
+
106 105
15.8K
14.7K
9
0.1VDC
33.2K OUTPUT
6 J11 J12
62K 5.7-6.3VDC Rx 1Vpp 51,F1
220uF
143A J7 11 510Ω
12
250V Current
36K Osc.
3-4VDC
144 SENSE
J8
3Vpp 47,D2 1-4VDC
143B
12Vpp 50,E2
3.3nF
220uF 7
0Ω Cx
10 18Ω
250V
DRIVE
114
163 102
133
7 8,14 9
8
+7.5V V-
REF.
90K 1N4007
MPSA64
XRC5184
J6 J PRA
115
200pF D
111
127
123
220uF 2,200pF
128 131
-244V
V- J PRA PINS: 3,10,15, & 19 V-
CAUTION! POWER SUPPLY VOLTAGES REFERENCED FROM V-.
SCOPE GND MUST NOT BE CONNECTED TO GND AND V- AT THE SAME TIME.
HH II JJ
KK LL MM
22-28V Vs
.8Vpp 25,F7
V. +12V
0Ω
200K 197
PN2907A 413
470Ω
0Ω 1N4007 12-18VDC Hs
.5W Horizontal Drive
33Vpp 26,E7
409 Transformer
422 341
342 CPT1505
D5
2SC
+ 19 2
+16V 100uF 220uF 332
H
4159
200K
338
100Ω
372
INCREASES 337
I11 3
TOP AND
PN2222 20
1
BOTTOM 4
2,200pF
VERT. SIZE.
200Ω 343
47Ω 2W 2W
+24V
373
340 GND
1N4148
100K
405
404
12-18VDC
50Vpp 29,F6
0Ω
466
+12V
GND
390Ω, 2W 12-18VDC Vs
1,000uF
3-5Vpp 31,F5
421
10.8-12V 35V
+
3.92K 10, E6
418
449
3.92K
0Ω
2SC3467
5.4-6VDC
417 192
0Ω V
11, E5 RAS. POS.
11 0 TO 7 VDC
193
+ +61V
comp.
-
H. S. +12V
+6V
415
H. V+
13
4
10.0K
9 10
14 510Ω
17 1/4
022
LM324
5-6VDC Hs
12 021
2.7K 033
7Vpp 09,E6
+
11
336
100uF
10.0K
026
023
H.Fo ADJ.
170Ω
GND
680Ω 340Ω I14
15.8K
+400Hz High Temperature Or
I16 I15
Excessive Beam
16 037 +
+800Hz
Current, Monitor Shut
12.1K 3 Down Circuit.
+6V
ID IC IB
22K
034 1/4 1
LM324
2
62K 017
I BEAM
033
011
+61V
+44V
200K 200K
FBP
GND
109 005
+16V
+6V
I BEAM
HORIZONTAL WIDTH CONTROL
1N4937 +55V
10.0K
H. S. +12V
031
170
0Ω 10.0K
1N4937
194
029
1,000uF
169 1,000uF
6V
+
GND
.33uF
10K 5
450 3.3K
GND
CPT1562 7
038 1/4
082 050
LM324
200K
6 6
5.6-6.2VDC Vs
033
3 2-3.6Vpp 33,B2
040
4
1N4937
Parabolic
Pincushion Correction
168
6V
FR205
11 0Ω
10
2.7K
533 10K
532
142 Blooming
009
041
166 correction.
84.5K
I BEAM
28.0K
097
1N4148
210K
.1uF 042
.01uF 62K
010
126
3,300pF 054 044
130
38.3K GND
24V
J9 +24V
HS +12V
125
No DVM
300Vpp 40,G1
44.2K 2
28K
5
H SIZE 8
058 1/2
CPQ1304 043 1/2 7 LM392
HEAT 100uF 10K 3
+
LM392
0Ω
SINK 12.1K
6
049
061
135 055
136A 4 6.8K
045
136 200pF
.01uF 056
10.0K
1KV
13
138 2-2.5VDC
095
047
4.4Vpp 39,B3
0.33Ω 47Ω
GND
2W 1/2W, CC
137 140
V- LEGEND
116 CERONIX
TP49, G1
No
100pF BOARD PART No.
0Ω 0Ω
. LTR.No
129
PART No. ON PRA.
177 176 SCALE
. X
X PRA PIN No.
:
{ DC VOLTAGE RANGE, DRAWN BY:
X-
X-Y VDC USING A DMM.
Y V
Measurements
0VDC Hs
USE V. or H. SYNC.
27Vpp 57,F1 are taken with X-Y VDC Sync. CERONIX Model 1993-VGA Monitor Circuit.
AC VOLTS TEST POINT
a white screen. Vp-p TP-REF.
Peak to Peak ASS. REF.
Hs - 5uS/div. WAVEFORM
CERONIX
Measured with scope
Vs - 2mS/div.
PART NO.
KK LL MM
NN OO PP
0VDC Hs
56V 28,D3
Fil. TC11
Fil. Rtn. TC12
Screen
0Ω
Red
Video
#2 FOCUS 0
092
Board FOCUS White
#1
800 EHT
0Ω
092A
NO DVM Hs
.9KVpp 27,G6
FLYBACK
TRANSFORMER
10
EHT
1/2W, CC
2SC5690
470Ω
13
433
520
0Ω
1N4007 V+ 9 FOCUS
1
435 #2 FOCUS
452
1.2Ω
SCREEN
8
434
12 Dynamic Focus
GND
11 0Ω
7
4
465
5
3
Vs
2
FIL.
V- 1
0Ω
CPT1561 453
524
&
525
GND
2
YC1
419B 426
419E
419F
VERTICAL
YC2
DEFLECTION
YOKE
419A 427
Horizontal Raster Adj.
22K
150Ω 1/2W
420
189
425
S4
0Ω 4.7Ω
270Ω
191 185 SR
CPT1538 3
424
S2
12mH
4.7Ω 0Ω 510Ω
+44V
195 447
188 SL 423 S1
100Ω
V+
1/2W
2,200pF
1N4007
394
1KV
2.2MΩ 2.2MΩ 507 512
1.00MΩ
510 511
504
200KΩ CPT1556
1 2
2SC3467
100uF
.33uF 1KΩ 514
25V
509 4
035
501
500 518
0Ω
330pF 4 3
84.5K 62K
019
500V
503 505
2SA
515
GND
1371
HORIZONTAL YOKE
0Ω
008
502
GND
YC4
5
445
446
YC3
69V or 70VDC Hs
10.0K 90Vpp 220Vpp 32,F6
Max. Min. H Size
051
9
0.1uF
8
1/4 250V
H. Linearity
LM324 517 coil
10
FR606
033 CPT
440
1566
150Ω
3.3K
430
1/2W
270Ω
428
053
516 H. Linearity
-Linear coil 6
1.5nF
200pF
Pincushion
CPT 1.6KV
1.6KV
Correction
1566 432
441
431
5.6-6.2VDC Vs
1-1.7V 34,B2
27nF
800V
442
Hs
4VDC 20VDC
10K
1.6uF
30Vpp 200Vpp 35,H7
030
250V
Max. Min. H Size
6V
443
Q R
CPT1564
052
HER205 HER205 HER605
457
4-19VDC Hs 7
27Vpp 36,J7
50uH
436
477 478
1N4937 .022uF
630V
458 .68 Ω .68 Ω 437
.10Ω .10Ω
462
28.0K 0Ω 1W 1W 1W 1W
475 476 .027uF
096 454
800V
2.7K
439
060
1 1nF
IRF520
500V
Vs
4VDC 20VDC GND
0Ω 510Ω
049
463 11Vpp 15Vpp 37,I6
Max. Min. H Size
094 461 Ω
470
460 1/2W
8
3.3nF
464
0.8-7VDC Hs
2.7uF 100V
Hs 12Vpp 38,J7
057
456
GND
HORIZONTAL WIDTH DRIVE
13350 New Airport Road
Auburn, California 95602
NONE DATE & REV. 4/10/96-E1 3/24/99-E5
9
2/18/92 9/30/96-E4 03/06/02-E8
F. H.
CPA4221, CPA4255
NN OO PP
24