PCB_M4KA
A7
■
Printed Wiring Board Diagrams
This projector is isolated from AC line by using the internal converter transformer.
Please pay attention to the following notes in servicing
1. Do not touch the part on hot side (primary circuit) or both parts on hot and cold
sides (secondary circuit) at the same time.
2. Do not shorten the circuit between hot and cold sides.
3. The grounding lead must be connected to the ground of the same circuit when
measuring of voltages and waveforms.
!
CAUTION
AV (SIDE:A)
1AA4B10C3770B
side A
R2801
R2802
C2801
A2811
D2802
D2801
C2804
C2803
C2802
K28D
R/C (SIDE:A)
R/C (SIDE:B)
MAIN “K8E”
side B
L1
1AA4B10C3780A
A SIDE
R5251
R5249
R5227
R5223
R5222
R5221
R5219
R5218
R5217
R5214
R1064
R1063
R1062
R1057
R1056
R1054
R1053
R1052
R1051
L1062
K100G
C5221
C5211
C5209
C5208
C1063
C1052
R5266
R5261
R5213
1
2
C5261
SC1051
R5265
R5264
R5263
R5262
R5236
R5234
R5226
R5216
R5212
R5210
R5207
R5205
R5204
R5202
R5200
R1002
L1033
L1032
L1031
L1008
L1007
L1006
L1002
L1001
1
2
54
53
1
18
C5263
C5223
C5207
C5206
C5204
C5203
C5202
C5201
C1082
SW2041
SC2052
SC2051
R5248
R5224
R5215
R2041
R1072
R1071
R1069
R1068
R1067
R1066
R1065
L2052
L2051
L1081
L1064
K20B
54
53
36
19
D2041
C5236
C5233
C5231
C5218
C5217
C5216
C2041
C1084
C1083
C1066
R5252
R5237
R5233
C5262
L1052
C5222
C1051
Q5261
K10J
K10C
K10A
Q5203
Q1051
IC5201
Q5208
Q1062
K10K
K10E
K10F
K10B
IC5241
Q1061
MAIN “K50A”
LED (SIDE:A)
READY POWER LAMP
(GREEN)
1AA4B10C3780B
A SIDE
WARNING
TEMP.
LAMP REPLACE
(RED)
(RED)
(YELLOW)
R2873 R2874 R2891 R2879
D2851
R2861
R2862
R2863
R2864
D2862
R2866
R2867
R2868
R2877
R2876
R2878
D2861
D2852
D2853
D2854
D2860
1
9
C2862
SW6808
D2856
D2857
D2863
R2872
R2871
R2869
C2861
D6803
Q2864
Q2861
Q2862
Q2863
K68B
MAIN “K8G”
MAIN “K50B”
AV (SIDE:B)
L4
B SIDE
SW2041
K100G
SC1062
R5220
R1061
R1060
R1033
R1022
R1021
L1061
D1061
D1041
C1062
C1061
C1043
SC1012
SC1011
SC1007
SC1006
SC1004
SC1003
SC1002
SC1001
R1003
R1001
D1042
D1002
D1001
C1044
C1011
C1009
C1001
R5244
R5243
R5239
R5238
R5232
R5231
R5211
R5209
R5208
R5206
R5203
R5201
R1031
D1037
D1036
D1034
D1033
D1032
D1031
D1008
D1007
D1006
D1005
D1004
C5210
C1081
C1042
C1041
C1008
C1007
C1006
C1004
C1003
C1002
SC1061
R5247
R5246
R5245
R5242
R5241
R5240
R5230
R5229
R5228
R2052
R2051
C5237
C5234
C5232
C5219
C5214
C5213
C5212
R1081
SC1009
SC1008
D1038
D1003
R5225
R1034
R1032
L1063
D1039
C1064
K10F
K10B
Q5262
Q5206
Q5204
Q5202
Q5201
Q5207
K10E
LED (SIDE:B)
B SIDE
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