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Service Model
8904A
A3
Component Coordinates
(1
of
X,Y
COMP
X,V
COMP
X,Y
C423 C.3 CR300 C.2
8.1
C424 C.3 CR301
8,2
8.1
C425 C,3 CR404
D,2
A. 1
C426 C.3 CR405
D,2
8,1
C431
0.2
CR406
D,3
8.1
8,l C432
0.2
CR407 C,3
C433
0.2
CR408 C,3
A.l
A.l C434
D.2
CR409 C.3
C435 D.3 CR410 C,2
A,1
C436
D,3
CR411 C,2
A,1
C437
0.3
CR415
8.2
A.l
C438 D.3 CR416
8.2
A.1
C440 C.1 CR417
8.2
A.l
C441 C.2 CR418
8.2
A.l
C442 C.2 CR419 C,2
A.l
C443 C.3 CR420 D,2
8.1
8.1 C444
0.2
CR421 C,3
A,1 C445
0.2
CR422
D,3
C446 0.3 CR423
D,2
A,l
C447 0.3 CR424
D,2
A.l
A,2
C448 D,1 CR425
D,3
8.2
C500 C,2 CR426 D,3
8.2
C501 8.3 CR427 C,2
A2 C502
8.2
CR428
D,2
8.2
C503 8.3 CR429 C,3
8,2 C504 8.3 CR430
D,3
8.2
C505 C,2
D,2
A.3 J1
A.3 CR6 8.3 J3 A.2
A.1
A.3 CR7 C.3 J4
8,3
CR8 A.3 J5 A,2
8.3
CR9 A.3 J6 A,2
A.2
8.3 CR17
8.1
J7
8.3
CR18
8.1
J201 A.1
D.2 CR26 D,l J400
D,2
C.2 CR27 D,l J401
D,2
C.3 CR202 A.1
8,2
C.3 CR203 A.l K1
A2
0.2 CR204 A,1 K2
A
lP1
t
I
?
lP2
B
2)
COMP
X,Y
COMP
K11 A2 0402
K401
8.3
0403
K402 C.2 0404
K404
D,2
0405
0406
L1 D.l 0407
L2
8.2
0408
L4
C,3
R2
L5
A2
R3
L6
A,2 R4
L7
L8
A2
R5
L9 A2 R9
L10 A.2 R10
L11 A,2 R40
L12 A,2 R41
L201 8.1 R42
L401 8,3 R43
L402 D.2 R44
R45
01 8.3 R47
02
8.3 R48
014 A.3 R49
015 A.3
R50
016 A.3 R51
017 A,3
R52
018 A,3 R53
019 A,3 R54
020
A,3 R55
021 A,3
R56
R57
033
8.1
0201 A,l
R58
0202
A,l R59
0203
8.1
R60
0204
8.1
R61
(3205 8.1 R62
0206
8.1
R63
0207 8.1 R64
L3 c.2 8.3
R1
C
X,Y
D.l
c.1
c.1
8.1
c.1
8.2
c.2
8.3
c.3
8.3
8.3
A,2
A,1
A.2
A.2
A,2
A,2
A,2
A,2
A,2
A,2
A.2
A,2
A,3
A,3
A,3
A,3
A.3
A,3
A,3
A,3
A.3
8.2
8.1
A3
A.3
8.1
8.1
A3
A2
A.1
COMP
C206
C207
C208
c209
c210
c211
c212
C213
C214
C215
C216
C217
C218
c219
c220
c221
c222
C224
C225
C226
C227
C228
c229
C230
C232
C300
C301
C302
C303
C304
C401
C402
C403
C404
C405
C406
C407
C408
C409
C410
C411
I
\
I
8,2
A.2
A3
83
8.3
A3
83
A.3
c.2
c,2
C,l
8.1
8.1
A.3
A3
A3
A3
8.1
A2
A.l
A.1
A.1
A.l
-
COMP
c2
c3
c4
c5
C6
C8
c10
c11
c12
C13
C14
C28
c29
C30
C31
C32
c33
c34
c35
C36
c37
C38
C40
C41
C42
c43
c44
c45
C46
c47
C48
C50
C51
C64
C71
C72
c79
C82
c90
c93
c201
c202
C203
C204
C205
-
R206
R207
R208
R209
R210
R211
R212
R213
R216
R217
R218
R219
R220
R221
R222
R223
R224
R225
R226
R227
R228
R229
R230
A,1
8.1
B,l
8,1
A.1
A,1
A.1
A.1
A.1
A.l
A.l
A.1
A.1
A.1
A.2
A.2
A.l
8.1
8.1
A.l
A,2
A,2
A,2
R232
A.l R421
R233
A.3 R422
R300
8.2
R423
R301
8.2
R424
R400
D.2 R446
R401
D.3
R447
R402
D.3 R448
R404
D.2
R449
R405
D,2
R452
R406
D.2
R453
R407
D.2
R454
R408
D.3
R455
R409
D,3 R456
R410
D,3
R457
R411
D,3 R458
R412
8.3
R459
R413
83
R460
R414
8.3
R461
R415
83
R466
R416
8.3
R467
R417
83
R468
R418
8.3
R469
R419
8.3
R470
D.2
D.3
D,3
D.2
0.2
D.3
D.3
D.l
8.1
8.1
8.1
B,1
8.1
8.1
A.1
A2
A.2
A2
A2
A2
A.2
A.3
A3
A,2
A,3
A,3
A3
A.2
A.2
A.3
A.3
A.3
A3
A.3
A3
A3
A3
A,3
A,3
A3
A3
A3
A3
A.2
8,3
8,3
C.3
C.3
‘2.2 C.3
C.3
C.3
C,2
D,2
C.2
C,2
c,2
C.3
C,3
C,3
C.3
C.3
D.2
D.2
C.3 C.3
C.2
Figure
8-15.
Service Sheet Information Component Locator
R490 R491
R492
R493
R494 R495
R496
R497
R499
TI
T400
TPI
TP2
TP3
TP4
TP5
TP6
TP7
TP8 TP402
TP403
<p/o
sEi
RLVERSE
A3’A10
sinE
OUTPUT
ASSEMBLY
ss2
I
82
82
82
8,2
82
82
82
8.2
0,2
A.1
C.2
’
A.l
8.1
A2
A,3
8.3
A,1
A,3
8.2
C,3
C,2
A3
Component Coordinates
(2
of
2)
pKp-l~~~!~~l
U4
U5
U6
U8
U9
u10
U16
u201
u202
U203
U401
U402
U403
U404
U408
VR19
VR31
VR201
VR206
VR208
VR401
VR402
R71
R72
R73
R74
R75
R76
R77
R78
R112
R113
R114
R122
R123
R125
R126
R136
R139
R141
R142
R201
R202
R203
R204
B,l
8,1
8.1
8.1
A3
8,1
B,I
A.1
A.1
A.1
c.2
c.3
83
8.3
8.2
B,1
8.2
A,l
8,1
A.1
8,3
c.3
NOTES:
(OR
A101 K2. K4. AN0 K6 ARE WITH THE RELAY
CONTACTS CLOSED: THE OUTPUT
OF
THE FLOATING
AMPLIFIER DRIVER AND ON/OFF SWITCH WITH
K401 OPEN.
c
INITIAL INSTRUMENT SETTINGS
VOLTAGES ON THIS SCHEMATIC UNLESS OTHERWISE
NOTED. SHOULD
BE
MEASURED AFTER KEYING IN::
FOR
A3:
FOR A10:
SHIFT PRESET SHIFT PRESET
SHIFT FLOAT
1
OFF
SHIFT FLOAT
2
OFF
f
1
(CHANNEL CONFIG.
1
NEXT NEXT NEXT
AMPTD
10
V
AMPTD
10
V
fl
(CHANNEL CONFIG.)
8-54