TEK 2225 - Page 160

5
2225 Service
VERTICAL PREAMP 81 OUTPUT AMPLIFIER DIAGRAM 2
*See Parts List for
serial number ranges.
REV APR 1990
Scans by ARTEK MEDLQ =-
BOARD
LOCATION
1 H
1G
1 G
X
1J
11
21
11
2J
1 J
X
1 I
21
2K
25
2H
X
2H
X
2H
2H
2H
2H
21
21
2H
2H
2H
X
21
21
1 E
2E
1 E
2E
1 F
2F
2F
1 F
2F
2F
1 H
28
X
38
3C
1A
1A
IF
IF
1 F
IF
1F
1E
1E
1 E
5A
5C
1C
CIRCUK
NUMBER
R241
R242
R244
R245
R250
R251
R254
R255
R256
R257
R258
R259
R261
R272
R273
R279
R281'
R28Ze
R283
R284*
R285
R286
R287
R288'
R289*
R290
R29 1
R292
R293
R294
R295
R538
R539
R540
A541
R544"
R545
R547
R548
R549'
R561
RT236
TP230
TP540
U130
U180
U225
U225
U537A
U5378
U537C
U537D
U537
U540A
U54OB
U540
W30
WE0
W140'
SCHEM
LOCATION
6P
5P
5P
5P
6P
4N
4P
4P
9P
3P
9P
4P
4P
9R
4R
3N
2N
2N
3M
3N
1
R
1 P
1 P
3N
2P
2N
1 P
1 N
1 N
3N
2R
5G
7E
5G
6G
6E
6E
5F
5F
5G
5D
7P
6H
6G
1G
1 OH
8K
9K
4F
6F
6E
5E
1
OK
6F
5D
1
OK
18
68
6H
SCHEM
LOCATION
2H
98
108
98
108
6C
10C
BC
6-2
98
108
6-2
10C
1 OD
9F
1 OF
8D
9D
8D
11D
9F
1 OF
9F
9F
9F
9F
80
9D
8F
1 OF
80
6H
lffi
8G
6H
7J
8H
9H
&I
5K
6K
5K
4K
7K
5L
6L
6L
4K
6K
4L
6L
5L
6L
7K
6K
8N
4N
8P
7P
7P
7P
6P
6P
BOARD
LOCATION
2A
4C
4C
4C
4C
4C
4C
4C
58
4C
4C
58
58
5C
4C
48
3C
48
4C
48
4C
48
3C
38
3C
3C
X
5C
3C
3C
1 E
2D
X
28
ID
38
X
38
28
28
28
2C
1C
1C
1 8
1 8
18
28
X
28
2C
18
18
1A
1A
2H
1
H
1 I
2H
1 H
1 H
1G
1 H
BOARD
LOCATION
6A
48
4A
48
4A
38
3A
4C
4C
4C
48
3C
38
18
18
21
11
2J
1 J
2K
1K
2H
21
21
4A
4A
48
4A
48
4A
48
5A
4A
4A
5A
5A
58
48
4A
38
48
4A
48
4A
3A
3A
3A
3A
28
58
38
3A
1 E
1 D
28
2A
1 D
1C
3A
28
3A
SCHEM
LOCATION
9E
28
3C
1 D
30
1 F
3F
98
1 0C
80
1 OD
8F
1 OF
5L
6L
8P
5N
9P
4P
9P
4P
2N
2N
2P
28
38
28
38
2C
3C
X
2C
28
38
2C
2C
30
IF
3F
ID
1D
3D
2F
3F
2F
2F
2F
2F
20
2D
IF
3F
6G
6G
1G
3G
5H
6H
3H
3H
2H
CIRCUIT
NUMBER
R145
R150
R151
R152
R153
R154
R155
R156
R157
R156
R159
RIM)
R161
R162
R164
R165
RIM*
R167*
R168
R169
R170
R171
R172
R174
R175
R176
R177
R178
Rl8O
R181
R182
R183
R185
RIM
R169
R192
R193
R194
R195
R202
R203
R204
R208
R207
R212
R213
R215
R216
R217
R218
R218
R222
R223
R225'
R226*
R230
R231
R233
R234
R235
R238'
R239
R240
CIRCUIT
NUMBER
J2
0102
0103
0104
0105
0114
Q115
0152
0153
0154
0155
0164
0165
0206
0207
0230
0231
Q254
0255
0256
0257
0283
0284
0285
R100
RlO1
R102
R103
RIM
R105
Rlo6
R107
R108
RlO9
RllO
R111
R112
R114
R115
R116'
R118
Rll9
R120
R121
R122
R124
R125
R126
R127
R128
R130
R131
R132
R133
R135
R136
R139
R140'
R142
R143
R144
6
and 7.
ASSEMBLY
CIRCUIT
NUMBER
C1W
C107
CllO
C111'
C112'
C114
C115
C116
C124
C125
C126
C130
C133
C153*
C156
C157
C160
C164
C165
C174
C175
C176
C180
C215
C216*
C217'
C220'
C225*
C237
C239
C240
C241
C242
C250
C251
C255.
C256
C257
C258
C281'
C292
C536
C537
C538'
C539.
C540
C545
C547
C561
CRlll
CR112
CR133
CR136
CR139
CR161
CR162
CR183
CR186
CR189
CR539
J1
J2
Pa~tial A1
A1
SCHEM
LOCATION
1C
3C
20
3E
2E
1E
3E
2E
3F
2F
3F
2F
6G
9E
8D
10C
9D
9E
10E
1 OF
1 OF
1 OF
9F
5K
4K
7K
9L
7K
7P
6P
6P
6P
5P
8P
4N
4P
9P
3P
7R
2N
1 N
6E
1
OL
5F
7F
10K
6E
5F
5D
X
3C
1H
30
3H
9C
10C
8H
80
8H
7D
2E
2M
also shown on
BOARD
LOCATION
5A
5A
58
6A
6A
48
4A
38
3A
3A
3A
2A
1D
7A
5C
5C
5C
4C
48
38
38
38
2C
1 C
28
X
1 C
2A
1H
1G
X
1G
X
1 I
11
2H
2J
1J
2K
21
2G
1 F
2F
1E
2E
2E
1F
IF
2F
48
4A
1 D
2A
38
4C
48
1 D
28
3C
5E
6A
6A
diagrams 3,.4, 5,