Agilent 8901B Service Manual

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Dear Customer,

As of November 1, 1999, four of Hewlett-Packard’s businesses, test and measurement, semiconductor products, health care solutions, and chemical analysis became a new company, Agilent Technologies. Now, many of your Hewlett-Packard products and services are in the care of Agilent Technologies.

At Agilent Technologies, we are working diligently to make this transition as smooth as possible for you. However, as a result of this transition, the products and related documentation contained in this shipment may be labeled with either the Hewlett-Packard name and logo, the Agilent Technologies name and logo, or a combination of both. Information in this package may refer to Hewlett-Packard (HP), but applies to your Agilent Technologies product. Hewlett-Packard and Agilent branded products with the same model number are interchangeable.

Whatever logo you see, the information, products, and services come from the same reliable source. If you have questions about Agilent Technologies products and services, please visit our website at

http://www.agilent.com.

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Model

8901B

08901-90114V3

Volume 3 Table

of

Contents

VOLUME

Assembly Service

A1 Keyboard and Display Assembly

Keyboard Displays Annunciators

A2

Audio Filters Assembly 12 BD4 8F-63 A3 Audio De-emphasis and Output Assembly 13 804 A4 FM Demodulator Assembly

Limiters Discriminator

A5 Voltmeter Assembly

Audio Detectors Voltmeter

A6 AM Demodulator Assembly

ALC Loop

Control Circuits A10 Power Supply Regulators 31, 32 BD5 8F-213,217 A1 1 Counter Assembly

Time Base 22 BD5 8F-143

Counter 23 BD5 8F-147 A13 Controller Assembly 24 BD5 8F-157 A14 Remote Interface Assembly 28 BD5 8F-181

A15 RFlnput A16 RF Buffer Amplifier 5 BD2

Option 030 Only A17 Input Mixer Assembly 5 BD2 8F-23

08901-60145

08902-60104 A18 IF Amplifier Assembly 5 BD2 8F-23 A19

LO

Divider Assembly 17 BD2 8F-101

A20

LO Control Assembly

08901-60185

Analog 20 BD2 8F-I23

Digital 21 BD2 8F-135

08901-60262

Analog 20 BD2

Digital 21 BD2 8F-135

A21 Low Frequency VCXO Filter Assembly 19 BD2 8F-119

-

(2314A

-

(2642A

-

(2314A

-

(2627A

(23144

to

and

to

and

to

2636A)

Above)

2622A)

Above)

3

TABLE

OF

CONTENTS

Schematic Theory/Trouble

Block

Sheet Diagram Page

Number Number

25 BD5 8F-167 26 BD5 8F-173 27 BD5 8F-177

10 BD3 8F-55

11 BD3 8F-57

14 BD4

15 BD4 8F-87

8 BD3 8F-41 9 BD3 8F-51

4

BD2

Shooting

8F-69

8

F-79

8F-17

8

F-23

8F-123

Parts

List

Page

Number

6-5 6-5 6-5

6-1

1

6-15

6-19 6-19

6-23 6-23

6-27 6-27

6-33

6-37 6-37 6-4

1

6-45 6-47 6-5

1

6-53

6-57 6-61 6-63

6-69

6-73 6-73

6-77

rev.

08JUL91

Volume 3 Table

A22 Low Frequency VCXO Assembly A23 Sampler Assembly A24 High Frequency VCO Assembly

A25

Audio Motherboard Assembly

A26

Power Supply Motherboard Assembly

A27

Digital Motherboard Assembly

A28 RF Motherboard Assembly

Series Regulator Heat

A29

A30 Line Module A31 Remote Interface Connector Assembly A32 Power Reference Oscillator Assembly A50 AM Calibrator Assembly A51 FM Calibrator Assembly

Audio

A52 A53 Power Meter Assembly

Sensor Control Circuits

A54 IF Amplifier/Detector Assembly

Option 030 Only

A55

IF Channel Filter

Option 030 Only

A71

IF Amplifier/Detector Assembly

Option 030 Only

A72 IF Channel Filter Assembly

Option 030 Only

of

Contents

Assembly

Sink

Assembly

CounterlDistortion Analyzer Assembly

Input

Circuits

(2314A

(26424

(2642A

to

2636A)

to

2636A)

and

Above)

and

Above)

Model

-~

~

~~~~~~c

Sheet

Number Number Number

19 BD2 8F-119 6-79

18 BD2 8F-107 18 B D2 8F-107

35

31 -32 BD5 8F-213, 217 6-89

35 35

31 -32 BD5 8F-213,217 6-92

31 BD5 8F-213 6-93

3 BD2 8F-15 6-94

30 BD3 8F-205 6-95

29 BD3 8F-197 6-99

16 BD4 8F-93 6-103

1 BD2 8F-1 6- 107

2

7 BD3 8F-37 6-1 11

6

34 BD3 8F-225

33 BD3 8F-22

I

Block

Diagram

-

- -

BD2 8F-9 6-107

BD3 8F-33 6-113

TheorylTrouble-

I

Shooting

Page Page

-

8F-181

I

8901B

6-81 6-85 6-87

6-90 6-9

1

6-93 28 BD5

6-1

15

6-117

rev.

08JUL91

Service

A53

I

Component

8,2

6,2

B,Z

B,2

8,2 8,2 8,2

8.2

A,2

A,l A,l A,2 A.2 A,l A.1 A.2

A.2

A2 A.2 A,? A.2

A.2 A.2 A.2 A.2 A.2 A.2 A.2 A.2 A,2

A.2

R.l

B.2

8.2

8.1 B,l 8,1

8,1

-

I

1

A

I

B

I

-

2

-

3

I\

t15V

-15V

DIGITAL

GNO

+3

SWITCH

GNU

&4

COMP

-

CI c2

c3 c4 c5

c7 C8 c9 c10 c11

c12

c13 C14 C15 C16 C17

a

c1 c19

c20

c21 C22 C23 C24 C25 C26

C27 C28 c29 C30 C31 C32 c33 c34 C36 c37 c39

CR CR2

J1

J2

M

P1

X,Y

A,?

A.3

8.3

8.2 A,2 A.l A.2 A.2

A. A.2

A.l A.2 A.2

A.2 A.2 A.2 A,2 A.2

8.2 B,2

8,2

B,

8,2

8.2

B,

8.1

8,2

8,2 B,2 8,2

B,2

8.2

A.2 A.2

A.2

1

A2 A.l

A,l

A,!

8.:

__

COMP

a1

05 06 08 09 010 01

a12

I

R1

R2 R3 R4 R5 R6

Ri

Rn

R9

n1o

R11

fl2

f113

I

1114

R15 Fll6

I

R17 R16 R19 R20 R21

R22

R23 R24 R25 R26 R27

R28

R29 R30 R3 R32 R37 R34

Coordinntfs

11x

1737

1138

R39

R40

R'l

I

R42 R43

R

41

R45

114u

H47 R48

R49

Fix

R51 R52

u1

u2

U3

u4 u7

U8

VRt

VR2

X,Y

__

8.2

H.2

LI.L!

U,2

t1.1

8.2

8.2 R.2

B.2

f1.2

B,2

8.2

8.2 R.2

13.2

8.2

A,

I

8.1

R.2

A,2 A.2 A.2

A,2

A.2

(1

COUP

-

of

2)

Model

89018

-

!L

A53

I

A

I

ComDonent

Locator

0

I

8G-2

W41P3

I

SAMPLED

SENSOR FEEDE4CI(

SENSOR RESISTOR

220

HZ C

2

I

GNO REGULATOR E

SENSOR

ZERO

220 Hz SENSOR

DRIVE

01

220

Hz

SENSOR

02

DRIVE

THROUGH PATH A CONTROL

SENSOR CONTROL PATH

'

>

I I

I

0

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I I I

I

I I

I I I

I

\

I I I

I

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I

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K

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B

-++&

(SEE NOTE

FOR OPTION

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PI0

W4,

I1

936

I,

11

934

11

I1

935

I1 I1

2

0011

SENSOR-TYPE REPIDBACK TO CALlBRATOf

-2

@

Pi0

W41

n

I1

I1 I1

,I

..

11

I1

11 11

&

11 11

11

11 11

11 11 11 11 11

,.

,I

P/O

AUDIO

ASSY

PAGE

I

936

SENSOR ZERO

121

FROM ZEROING CONTROL

A25

MOTHERBO,

(0890

1-60

Pi0

Y41

P

I

,

I I

I

I I I

I

I I I I

I

I 1 I

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4RD

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13

I

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220

l~

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SENSOR

1

FEEDBACK

I

1

l

I I I I

11 I~

I I

I

/

t15V 56.2k

I

Hz

I

1

v2

POWER-SUPPLY DECOUPLING

I

om

GROUND REGULATOR

-

Rh

,

C14

15"

,I

7

I

4MPLIFIER

r

a

I

0.

-

7

ATTENUATOR

GD

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2

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R36

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0.047u

I

cw

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I

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I

-

T

CIO

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82.5U

SYNCHRONOUS DETECTOR

D

0-DET

TP2

0

OET

TO FILTERS

I.

SEE TABLE EA-4SCHEUATIC DIAGRAM NOTES.

2.

ALL REFERENCE TO 141SHOULO BE CHANGED

TO

W42

3.

4.

WHEN OPTION

ANALOG GNO CREATED

FRONT PANEL VIEW OF SENSOR CONNECTOR

BY

NOTES

001

IS

0

.A

L.

USED.

W41P3:

.C

I

IS

A COMMON GROUNO FOR A53

THE A53 GROUND REGULATOR CIRCUIT,

K.

kh

/

aTTENU4TOR CONTROL

2-

FROM DATA LATCH

C30

I

om

-

R27

13.3k

...

c22 C26

--

0.

I

0.047"

/

'5

R122

51

10

X

I4k-4

15"

0.047~

--

c21

47om

3;

31

2.2k

I

I5V

iR34

4220

R35 5620

I

-15V

R37

look

iR38

61.9k

~20k

FREQ

@-.

R40

-t

-15V

R4

I

tR43

61.9k

-15V

4220

R45 5620

I

08

R4T

1000

149

OOk

'P54

TP4

SENSOR DRIVE

PI

01

\

02

Pi0

141

J

I

I I

P2

3

PI0

w4,

,NOTE

PAGE

THIS PAGE

21

REFERENCE

DESIGNATIONS

PART

NUUBERS

118V - 13

-15v

-

4

FROM SENSOR MODULE SWITCH

CONTROL

2

-15V

_1(

37

<-LA

-15V

";,

-15V

ss

1

BG-3

Service

A53

Component

J1

"

A6ND

AC

TPS

DET FLTR YLTVIB GNU

TP1

TP2 TPJ

FREO

\

TP4

ANALOG

TP7

62

UP

/

I

1

-

2

"

1 J2

I

1

I

:OMP

c35 C38 A,2 C40 A.2 C41 A.3 C42 A.2 c43 8.2 C44 A,3 C45 A.2 C46 A.3 C47 A.3

C48

C49 A.2 C50 C51 A.1 c52 c53 8.2

X,Y

8.2

A.3

8.3

83

COMP

R

64

R65

R66

R67

R68

R69

R70

I

R7 R72 R73 R74 R75 R76 R77

TP3

X,Y

A.3 A.3 A.2 A.2 A.2 A,2

8.3

8.2

8.3

8.3 A.1

8.3

8.2

A.2

-

CR3 8.2 CR4 8.2 CR5 A.7

J1

J2

K1

2

K2

az

a3 Q7

ai3

014 ai5

A,! A.1

8.2

AI

8.2 8,2

8.3

A.3 A,Z

u5 U6 u9 u10

u1

u12 U13 U U15 U16 U17

VR3 VR4 VR5

I4

A.2 A.2

8.2

8.3

I

8.3

8.3 A.3 A.l A.2

8.3

A.2

A.2 A.2 A.2

Coordinates

COMP

(2

of

2)

Model

X.Y

89018

-

3

t15V

-15V

DIGITAL

GND

&3

SWITCH

GNU

&4

-

3

R53

R54

R55

R56 R57 R58

R59

R60

R61

R62

R63

8.2

8.2 A.3

8.2

8.2 A.3 A.2 A.2 A.3 A,2

A,2

__-

A53

I

A

I

Component Locator

B

I

A53

POWER

SENSOR

METEA

INPUT

(1

CIRCUITS

OF

2)

ss

1

80-4

INSTRUMENT BUS

FROM CONTROLLER

PI0

SENSOR

MODULE

SENSOR-TYPE +15V READBACK

(08901

4

6

-60137)

I

39

40

41

P/O

A53

RF POWER ASSEMBLY

SENSOR-TYPE READBACK

/-

t5V

SELECT DECODER

QB

__

-\

(2

OF

2)

__

-POWER-UP RESET-

R53

2150

(08901-60130)

I-

1

OI(H1

d2~1

d3(n1

__

DATA LATCHES

5DIFF

12

Dl

13

Dl

FF

__

-\

k

NC NC

d?

NC

__

/-

FROM SYNCHRONOUS DETECTOR

WIDE FILTER(H1

SPARE OUT

FREQ OFFSET

ATTEN ATTEN

2

18

(Ll

11

(Ll

__

SENSOR-TYPE READBACK

mv

UISA

+6V

6

7

U16B

__

NOISE FILTER

<yl>

0

is"

R50

1960

.

$

.'2610

R78

FREQ OFFSET

SPIRE OUT

__

\

/

'2

\

ATTEN CONTROL

__

\

FLTR

lP3

1

/

/2

__

R64

316

t6V

__

__ __

RF POWER READBACK XA53

7

SWITCH

CD

10

::I1

3

-

FILTERS

SENSOR-TYPE REbOBACK SWITCH

(L

I

9

I

,

'6 '5

F3

UBC

-,

3

,

7

,

ENSDR ERO

I

__

POWER REFERENCE OSCILLATOR CONTROL

__

a

C5

I

97

I

0.

45v

-SENSOR MODULE SWITCH CONTROL

_-

7

PWR REF OSC ONIUFF

-15V

,

'3

__

_-

\

--1

-15v

t16V

4

P/O

A25

IT--

Pi

,

2

12

3'

4

J

POWER REF

osc

ONIOFF

OSCILLATOR

I.

SEE TABLE BkQSCHEMATIC NOTES

2.

THE DIAGRAM BELOW

3.

OF FOR

A53K1.2.

OPTION

001,W42

DIAGRAM

SHOWS

THE INTERNAL CIRCUITRl

REPLACES

1141.

A53KI

TOP

NOTES.

VIkW

2

I

Dt5V

I I

1

0

I

t15V

GND

IC

ATTEN 2B ILI

NC

"

SENSOR TYPE

FILTERS

CALIB

(HI

7

dl001

dzin)

I

4(Ll

FF

12 . FF

10

(Ll

ILI

-

1

/'

l/

/

T

-ZEROING CONTROL

a

-

t16V

4

,SENSOR ZERO

I

CURREF

t15V t15V

L

1

R66

<

l5

+50

TOi56VdC

\

~

7

SWITCH DRIVE ONE-SHOT

7

-

R72

IOY

I

SENSOR(L1

+5v

1

1330

R16

42.?k

~

t5V

+5v

1

15V(SW

6

7

r?

I

CR5

0.01"

i:

1

-

I5VlSW

I

tl

I

U14,

15

U16

csv

*2

-

B

-

ss2

8G-5

Ser v i

ce

Model

89016

SEE REVERSE

SIDE

POWER

CONTROL CIRCUITS

METER

(2

OF

2)

ss2

BG-6

IS

WUNTED

ON

SPACER

A32

ComDonent

Locator

b

fREO

ADJUSl

A32

POWER REFERENCE OSCILLATOR ASSEMBLY

-

I

c2

5000P

=T

:rj;

I I

c3

I

tl5V

;F

&"

6

PWR REF OSC ONIOFF

c5

0.01"

-15V

-_

__

,-

ALC LOOP

R8

1OOk

__I

I-

DC REF AND LEVEL ADJUST

R7

+

-15V

(08901-60227)

__

-,,-

CRZ

A

CT

T

lfJoP

++

E""

0

__

50

MH2

-

L

CR3

82P

__

OSCILLATOR

-\

__

L2

4.7"

I

"'

1,

SEE TABLE8A.-4 DIAGRAM NOTES.

[OPTION

r-----i

I

I I

L

(EXCEPT

001

ONLY1

CALIBRATION

RF POWER

OUTPUT

- - - - -

CALIBRATION

RF POWER

OUTPUT

1

A

OPTION

00

I

NOTES

FOR

SCHEMATIC

LVOLTAGE

DIVIDER

J

ss3

0G-7

-

Service

AI5

Component

x,y

A.3 A.1 A.3

8.3

A.3 A.1

8.3

8.3 A,3

8.1 A.2

8.1

A2

8.1

8.3

8.1

8.2 A.3

8.2 A,3

8.2 A.2

8.1 A.3 A.2

8.2

8.3

A.1

A.2 A.2 A.2 A.2 A.2

A,l 8,l

A.1

8,2

A.2

8.2

8.1

-

COMP

-

L2

L3 L4

MPl MP2 MP3 M P4 M P5 MPG

01

02

QG Q7

Q8

Q9 010 a1

R1 R2 R3 R4

R5

R7 R6 R9 R10

R11 R12 R13 R14 R15 R16 R17 R19 R20 R21

R22

R23 R24

R25

R2G R27

X,Y

8,1

8,l

8,1

8.1 A.2

8.2 A.2 A2 A.2

A,2

8.2

A.2

8.2

8.2 A.2 A.2

1

8.3

A.3 A.3 A,3 A.3 A,2 A.3

A.2 A.2 A.2

8.3

8.2

8.1 A,l

8.

A.2 A,l A,l A2 A.3

8.2

COMP

R28

R29 R30 R31 R32 R33 R34 R35 R36 R37 R38 R39 R40 R41 R42 R43 R44 R45 R46 R47 R48 R49

R50

R51

R52

R53 R54

R55

R56 R57

R58

R59 R60 R61 R62

I

TPl

u1 u2

u3

A.2

8,2

A2

6.2

-

I

A

MP4

I

B

I

H=

>OMP

-

c1 C2

c3

c4 c5 C6 c7 C6 c9

c10 c11 c12 C13 C14 C15 C16 C17 C16 c19 c20

1

c2 c22 C23 c24 c25 C26 c27

C26

CRl

CR3 CR4 CR7 CR8

J1

J2

K1 K2 K3 K4 K5

L1

-

Coordinates

X,Y

A2

8.1

8.2

A.3

8.2 A.2 A.2

8.2

COMP

8,3

A.3 A.2

8.1 A.2 A.1

8.2

8.1 A.2 A.2 A.3 A.2 A.3

8.2

8.2 A.3

8.2

8,3

8.3

A2 A.2 A.3 A.2

A.1

A.2 A.3 8,3

Model

89016

8G-8

-

P/O

A28

MOTHERBOARD ASSY

(08901

RF

-60229)

__

I

PI0

-

XA15

A

AI5

RF

INPUT

--7

20<

20

10

5.25

40

dB

N0.2

IHJ

MHz

HPF

ASSEMBLY

(HI

(08201-601831

--

_-

0

-_

_-

__

RELAY

\.2>

DRIVER

-

-_

__

_-

-_

NOTES

\

I.

SEE

IABLE

8h-4

FOR

DIAGRAM NOTES.

2. THE DIAGRAM BELOW SHOWS THE OUTPUT STAGE OF COMPARATOR

SCHEMATIC

A1SU2

IN DETAIL.

A15K2-5

BOTTOM VIEW

NOTE:

INPUT RANGE

150

UHZ

650

MHZ

TO

650

1300

MHZ.

-25

-20

TO

t30

d0m

CR

I

CR3

I

RF LEVEL OETECTOR

^._

7

R46

1780

'1%

I

ON

t5V

R17

21.5k

t5v

6

-

II5VIFI

5.25

MHZ

HIGn-PIss

tISVIF1

+5v

FILTER-

-

0

tl5VIF

I00

15v

PI0

INPUT ATTENUATOR

)

50"

c--,

+5v

DETECTOR AMPLIFIER

-

mv

.

+5v

I I

\

I

PI0

I I

4-3

137

A28

TO

INPUT MIXER

934

5A

PI0

;'?RF

LEVEL-

x:

'I1

3.

OPEN COLLECTOR OUTPUT.

4. PC TRACE INOUCTOR

A15U1.2

TOP VIEW

20

o6

0

4

A

I

SU3

TOP

VIEW

5

CIRCUIT

BOARD

TOP VIEW

,E&!

40

CIRCUIT

BOARD

TOP VIEW

IO

KEY%

00

50

05

010

o

06

PI0

A28

POWER SUPPLY

DECOUPLING

%

i

"

7

I

t5V

I

-OVERPOWER DETECTOR DETECTOR

15v

I

R43

1960

C26 2150

loop

T

R44

v

G2.6

1620

a

TO

+2.BVdC>

\s(

-AMPLIFIER

R57

3160

c24

-p

0.01"

OISCHARGE-

75

-

a

OVERPOWER ILI

I

>21

I

I1 I1

I

t

---

TOIFRM CONTROL

~I

_I

LO,

I I

I I1

AI5KI

BOTTOU VIEW

I

ss4

BG-9

Service

A17

8

A18

I

UP2

UP1

A

I

J?

8

J!

I

C

I

I I

I

,

I

D

WRI

1

J

_I

n

Gj

:,

+

I

0000l0

c2

::::'

n

I

~+15V

If)

.--15V

(F)

-

COMF

-

C1 C2 c3

c4

c5 66

c7

C8

ca

c10 c11 c12 C13 C14 C15 C16 C17 Cl8 c19

czo

c21

C22

C23 C24 c25

C26 c27 C28

c29

C30 C31 c32

c33

c34 c35 C36

CR 1 CR2

CR3 CR3 CR4 CR5 CR6 CR7 CR8

CR9

42 A.2 A,2 A.2 A.2 A.2

A'2

A'2 A.2

A'2

A,2 A.2 A.2

A.3

8.3

A.1 A.2

82

02

A.2 A'2

A2 A.2 A'2

A'3

A.3

L11

L14

MP1

MP2

M

P3

01 Q2 Q3 04

Q5

06 Q7

Q8

Q9

Ql

0

011

2

01 013

R1

R2

R3 R4

R5

R6

R7

R8

R9

R10

X,Y

A.1

A.l

8.1

8.1 A.1

A.3 A.3 8,2

8.2

8.1 A.2

A.2

A.1 A.2 A,l A.2

A.2

A.l A2 A.2

A.2 A.2 A.2

8.2

B.2

8.2

A.2 8.2 A.2

A.2 A2 8,3 8,3

8.2

A.3 A.3 A.3

8.2

8.1

8.2

COMP

R12 R13 R14 R15 R1G Rl7

1318

RI9

RZO R21 R22 R23 R24 R25

R26

R27 R28 R29 R30 R31 R32 R33

R34

R35

R36 R37 930

R39

R40 R41

R43 R42 R44 R45 R46 R47 R40 R49

R50

T1

U1

X,Y

8.2

A.2

8,3

8.2

8.3 A.2

8.2

8.3

A.2 A.2

A.2 A.2 A.2 A,2 A.2

A.2

A2

4.2 4,2 A,2

A.2

3.3

4.2

3.3

4.3

4.2

4.3 3,3

3.2

COMF

__

C1 c2

c3

c4

c5 C6 c7

C8 c9 c10 c11 e12 C13 C14 C15

C16 C17

C18 c19 c20

c21

CR1

CRZ CR3 Cf14

CR5

CR6

CR7

J1 J2

11

12

MPI

01

Q2

Q3 Q4

05

06

07

Component Coordinatesf2642A AND

ABOVE)

X,Y

c.3 c.3

D,2

D,1 D,3

D,2

c.1

D,2

c.. c,.

C,l c.3

D,2

c.2

c,2 c.2 c.2

c,2

c.3

D.2

0.2

8,2

D.2

D,2

D.2

0.2

D.2

c,1

D,I

c.2

D.1

D,1

C,2 C,2 C,2

D.2

COMP

R1

R2

R3 R4

R5

R6 R7

R8

R9

RIO

R11 R12

R13 R14 R15 '316 R17

r18

R19

R20

R21

R22

R23 R24 R25

R26

R27

R28

R29 R30 R31 R32 R33

-

X,Y

D,3 D.3

0.2

D.2

D.2 D.1

D.l C,2 c.1

c.2

0.2 D.1

D.2 D,2

D.l D.1 D.1 D.1 D,2

D.2

C,l C,2

c,2 c.2 C.2 C.2 C.2 c.2 C.2

C,2

D.2

Model

89016

A17

I

A

I

B

I

C

Component Locators

A18

I

\

SEE REVERSE

0

SIDE

A15RF

INPUT

I

~

8G-

10

-

Model

8901B

CHANGES

On the schematic:

0

Sx

-

Add to the front label,

to 231 4A to 2636A.

In the A 17 component coodinates:

0

A

1

7L

14

-

Add L 14 with coordinates

0

A1

7C28 - Add C28 with coordinates A,2.

On

the A 17 component locator:

0

A 1 7L

14 - In grid location A, 1 add L

0

A1 7C28 - In grid location A,2 add C28 directly to the right of R25.

A1

6, and change the serial prefix

A,

1

14

between L 12 and C20.

Service

On the

A1

0

C28, L6, new L6

7

schematic:

L14

as

-

Delete L6 and replace it with C28, L14, and

shown in the figure P/O A1 7 Input Mixer Assembly

(2333A to 263644) on page 8G-10.3

On the A 1 7 component locator:

0

A1

7MP5, MP6 - Delete all references to

On the A1 7 schematic:

0

SHIELD - In the lower, left portion delete the title "SHIELD" and the dashed line that represents the shield.

On the A1 8 schematic:

0

AI

8E1

-

Add a ferrite bead,

ss

5:

0

Use

SS5

(2642A)

on page

El,

8G-

12 and 8G-

MP5

of

to the base

13.

and

MP6.

the A1 7 schematic,

of

47.

rev.

ss5

SG-

I

4

JU

L37

10.1

A17

INPUT

I--

ri

/

I

R2

5620

I

LO

Y.7

!Rv

RF

INPUT

MIXER ASSMLY

+I

SVIFI

(NOTE

LO

GAIN

--

IYPLIFIER

(08901-60145)

a

I

OdB

6810

3)

RI8

8250

0.01

--

CIO

0.01"

06

\

1

--

c12

$L

--

fl4V

-- --

i

I

1

I I

I

I I

I

4

61

I

I I

I

I I

I

I I

4

18

F

N 2

IF

PMPLIFIER ASSEMBLY

--

c3

-

0.02"

n.

R33

IW

..R3

::SI10

--

-15VlF)

108901-60004)

--

c5

<./5)

I

--

PHASE COWENSATION UPLlFIER

GAIN

=

oas

-----

--

7

--1

I

A16 BUFFER AMPLIFIER ASSEMBLY (08901-60250)

-

-----

IF

AMPLIFIER

(12db

tlW

IF1

GAIN)

-

1

I

I I

I

9

FROM LO .AI71 CONTROC

-55

I

ANALOG GRWNO

I

IMz

BPF

I

<

-5v

-

3;

4

u4

5.62

L2

INOTE

.

..

I

I7

I

ISV(F1

3)

,

1

R15

1000

POWER

OECOUPLING

SUPPLV

7

+I4V

t12.6

TO

R25

4220

R25

51

10

+14.3

4s5

Vdc>

0

nnz

IF

+14V

+14v

R2P

I780

R29

I780

R3O

IO0

PI0

r

I

i

I

NOTES:

1.

2.

3.

4. AiJC27

5.

6.

A20

-

POWER

SUPPLY

OECOUPLING

01

tl5V

-

(i

:,

I

I I

-1sv

A$.<-

SEE TABLE OPEN COLLECTOR OUTPUT.

INDUCTANCE

OPTION CONJUNCTION WITH OPTION

RELAYS IN TTL LOW INPUT HILL ACTUATE THE INDICATED SEGMENT. AND THEN OEACTIVATE THE SYITCHING SOLENOID,

BA-4

SCHEMATIC DIGRAM NOTES.

IS

APPROXIMATELY 4.5uH AT 1MHz

IS

A

METAL STRAP OVER RB AND

003

IS

NOT AVAILIBLE IN

S2

ARE LATCHING TYPE. A MOMENTARY

I

;:s

030

SERIES.

-

-15VIP1

R9.

7.

SWITCH CONNECTION LOCATOR

INTERNAL LO

J2

NC

r-3-

R30

-

ISV(F

A17U1

TOP VIEW

909

I

A17 04.6 TOP VIEW

I

R5

110

a.4

TO

7.

--

I I

I

i

TO

Ab6

CHANNEL FILTERS

ASSEMBLY

IF

ss5

8G-11

Y

X

C

Service

AI? & A18 Component Coordinates (2314A

A

I

B

I

-MPl

HP

I

3

-w3

n

>NOTE,

LONG LEAD, TD'C

01

I

-+I,V

CI

+

+15V

(F)

I

A

-

I+

ClO

I

COUP

x,v

:OUP

x.v

(MP5

looooo

I

~0000000

I

SHIELD

MP5-8

ON

CO((PONEN1

SIDE

000000

A4

IS

I

ON

CIRCUIT

NOTE,

07'i.

SIDE

0

00000~

0

Ai7

COMP

c1 C2 A.3 c3 8.1 C4 A.3 c5 A.3

CG

c7 C6 8.3 c9 c10 C11 A.2 C12 A.2 C13 A.2 C14 8.1 C15 A.l C1G A.2 C17 A.2 C18 A.2 C19 A.1 C20 A.1 C21 A.2 C22 A.2 C23 A.l C24 A.l C25 A,l C26 A.2 C27 8.1

CR1 8.2 CR2 CR3 A.2 CR4 A.2 CR5 A2 CR6 A.l

DSI

J1 J2 J3

L1 L2

L3 8.1 L4 L5

L6 A2

8.1

8.2

8,2

8.1

A.1

A'1

"l

A'3 A'3

X,Y

COMP

L7 L6 L9

L1o

L11

L12

L13

MP1

M P2 M

P3

MP3

M

P4

MP4

M P5 MP5 M P6 MP6

o1

02

Q3

04

Q5

06

o7

Q6

R1 R2 R3

R4

R5

R6

R7

R6

R9 R10

R11

R12

R13 R14 R15 R16 R16 R17 R19

X,Y

A.2 A.l A.2 A.1 A.l

A2 A.l

8.1

8,I

A.2

8.1

8.2

A.3 A.3 A.3 A,3

A.2 A.2 A.2

8.1

8.2

8.3

8.1

8.

I A.3 A,3 A.3 B,2 B,1

B,l

8.1

8.1 B,l

8.1

8.3 A.3

8.3

8.1

8.2

8.1

COMP

R20 R21 R22 R23 8.2 R24

R25 R26 A,2 A.2 R27 8.2

R28

R29 R30 A,2 A.2 R31 A.2 R32 A.2 R33 A.2

R34

R35 A.2 R3G A.2 R37 A.1 R38 A.2

R39 R40 A.2 A2 R41 A.1 R42 A.2

TI

U1 u2 8.3

X,Y

8.2

A.2

8.2

COMP

-.

C1 c2 c3 c4 c5 C6 c7 C6 c9 c10 ct1 ct2 C13 C14 C15 C16

ct7

C16 c19 c20 c21

CRl CR2 CR3 CR4 CR5 CRG

CR7

J1

J2

11

12

MPl

01

02 03

04 05

OB

07

TO

Ai

2635A)

c.3

D,2

D,l

0.3 D.2

c,t

D.2

C.l

c.

1 c.1 c.3

D.2

c.2 c,2 c.2 c.2 c,2 c,2 c,3

0.2

D.2

8.2

0.2 D,2 D,2

02 D,2

c.1

c,2

D'l c,2

D.l

D,l c,2 c,2 c.2 D.2 D.2

0.2

R3

R4

R5

R6

R7

R8

R9

R10 R11 R12 R13 R14 R15 R16 R17 R18 R19 R20 R21

R22

R23 R24 R25

R26

R27

R28

R29 R30 R31 R32

I/

R33

Model

89018

li

I

A17

I

A

1

0

Component

I

Locators

b

A18

I

BEE

REVERSE SIDE

Y

A17 A18

INPUT MIXER

IF

AMPLIFIER

SERIAL PREFIX:

I

SSb

2642A

AND

ABOVE

8G-

12

Model

8901B

On

the schematic:

prefix to

CHANGES

-

On

the front label delete

264219

and above.

A16

and change the serial

Service

ss5

SG-

12.1

FROM LO DIVIDERS

I

I I

I

I I I

----.

I

LO

I

OUTPUT

L___d

J13

r--------

(OPTION

I I

S2 LO INPUT SWITCH

(OPTION (08902-60024)

003

ONLY)

W32

r\

v

IF CHANNEL

FILTERS

030

r--_~

I0U:;uT

I

-3

[EXCEPT OPTION

SERIES ONLY)

(NOTE

41

J,l3

-

1

I

a

n35

003

----

I

1

L--d

2

OR

SERIES

LO

I

INPUT

I

J14

1

w33

0301

PI0

RF-MOTHERBOARD

(08901-60229)

-------

I

21

I

A28

FROM LO CONTROL

(H)

-

-Iwion

FROM INPUT

RF

I

MLULXI-

ASSEMBLY

455 kHz

SELECT

- - - - - - -

'(86

BPF

IHI

I I I

- - - -

I

Iv)

-----

A17 INPUT MIXER ASSEMBLY (08902-60104)

,-LO AMPLIFIER GAINtlOdB-\

r--

I

I I

I

I I

I

I I I I I

I

t15V IF1

A1

1Ok

I

it

J

.:

R2

i'

5620

V

tl5V

R6

316

IF1

i-':;J

05

INOTE

-u)

--

-

t15V

L3

21

Rll

215

(FI

I

.

Rig

4'8250

V

Cl

0.OlU

+

+15V

IF1

R20

or

:

R21

"2610

0

-e---

<

t

3

-1

.-c9

--o.o1u

TO

824

147

+g.lVdc

L4

(NOTE

7

>

3)

CIO

0.OlU

/-POWER SUPPLY DECOUPLING

+15vy/-+

I

-I

,-

I I

L

IMI

1-

TERy

INPUT MIXER

u1

I

'-\

aD

+

n-

89

4220

-- --

t15V IF1

(NOTE

31

0.01"

CB

+

2.2u

IF

FILTER SWITCH

<J4>

+13V

455kHz

1F

17

OS1

-5V

~12

IF)

t13V

R45

46.4 tllV

IF:"

0.lU

ai',';

--

\

Cll

1U

--

P

-455

kHZ WIDE BANDPASS FILTER

Go

--

rSECOND

t11V

LE

R35

4220

7

--1

I

IF

AMPLIFIER

<J4>

R48

7

138

11.6

L14 18U

C31

120p

-7

C28

120p

7

I

wao

I

PI0 A28

I--1

I

TO

A72 IF CHANNEL FILTERS ASSEMBLY

lDPTION

SERIES ONLY)

4

t15V

-15V

ANALOG GRO

A18 IF AMPLIFIER ASSEMBLY (08901-60004)-

r

I

030

I

I I

I

..

4.

1M-

-----

IF

r

I

R33

POWER SUPPLY-

INPUT AMPLIFIER

GAINI20dB

CR4

CR5

R6

3830

1

-15V

+15V IF1

-15V IF1

+ +

2.

CR6

CR7

y80

IF)

+

\

r

7

u

si1

f;'

c5

22u

--------

PHASE COMPENSATION AMPLIFIER

7

dR14 1000

GAI

NI

Od8

INVERTING AMPLIFER7

tl5V

(Fl

I

Rl9

so

-15;

IF1

NON-I AMPLIFIER NVERT I NG

7

t15V IF1

.4

TO

7

-AMPLIFIEA

t11.4 Vdc>

FM OISTN

Il.JMHz

I

+15V

R27

110

R28

2870

IF

GAIN

IF1

2.4~

OUTPUT

=

7

1368

1

I

NOTES

I

2. INDUCTANCE 4.5uH

I I

I

1.

SEE TABLE 0-6 SCHEMATIC

OIABRAM NOTES.

S2

EXTERNAL

Lo

EX

T

LO IN

MIXER

INTERNAL LO

AT

IMHz

IS

APPROXIMATELY

04.06

(TOP VIEW1

kE

C

CONNECTION LOCATOR

NC

OUT

ERN A L

ss5

BG-13

Service

Model

89018

A

I

B

SEE

BUFFER AMPLIFIER

REVERSE

SIDE

A17

INPUT MIXER

A18

IF

AMPLIFIER

SERIAL PREFIX:

8G-14

II___________---

-q

I

000000000000000

I1

A.

n.

A.

n.

A.

n.

3

1

I I

1 1

i

-

:Wf

-

07

08

09

010

011

012

ni

n2

n3

nq

R5

R6

ni

n8

RS

R10

Rll

-

15

I

-

X.Y

-

A.

2

A.

3

A.

n.

3

n.

3

A.

3

A.

3

A.

n.

8.2

0.

2

8.

3

n.

3

n.

I

n.

1

I

i

1

B.

-

3 3

3

FROM

A16

IF AMPLIFIER

P/O

A25

AUDIO

MOTHERBOARD

A55

I---

I

IF

CHANNEL

FILTER

-- --

ASSEMBLY

CHANNEL ONE INPUT

r

SELECT SWITCH

NEL TWO INPUT-

(OPTION

7

CR2

030

7

-BUFFER AMPLIFIER-

SERIES)

--

CHANNEL ONE

BUFFER AMPLIFIER

CHANNEL TWO

(08901-60251)

--

7

1st

STAGE

STAQE

FILTER

r

CHANNEL FILTER

r

CHANNEL

--

7

1

,-

-- --

FILTER ONE

IF

(GAIN

=z

AMPLIFIER

6dB)

-- --

-\

-- --

--

--1

I

TO A54

7

CHANNEL OUTPUT

SELECT SWITCH

-

SELECTABLE

(0

OR

IF

2OdB)

OUTPUT PAD

7

FILTERED

IF

(2068

AMPLIFIER

GAIN)

-----

7

SELECT DECODER

7

CHANNEL SELECT AND LO INPUT SWITCH

DATA LATCH

7

LO INPUT SWITCH

CD

(S2)

CONTROL

-\

t5v

II

BUFFERED SELECT TO A54 IF AYPL/DET OATA CONTROL LATCHES

TO

LO INPUT

SWITCH

I I

SERIAL

PREFIX:

29141

TO

SS6

8G-15

2838A

Service

Model

89016

J1

UP1

J2

1

.lP1

SEE

REVEFSE

SIDE

A55

IF CHANNEL F I

SEBLBL

LTEA

PREFIX:

2314A

T

8G-

16

-1p2

-

X,Y

-

A.

1

8.

1

A.

1

A.

1

A.

1

A.

1

A.

8.

1

A. A. A.

A.

A. A. A.

A.

-

1 1 1 2 2 2 2 2

2 2

2

FROM

A55

IF CHANNEL

FILTERS

6-

I

W32

I

*:

,-

DATA LATCHES

-\

,

/-'

ATTENUATOR

-

7

AMPLIFIER

(2168

GAIN)

1

7

PROGRAMMABLE

,-

IF

CD

ATTENUATOR

ATTENUATION AND AMPLIFICATION

AMPLIFIER

(21dB

GAINf

2

7

-\

-

ATTENUATOR

\

MPL I F

I

-

3

-,

4

42448

ER

GAIN!

-

,-

ATTENUATOR

4

'-\

NOTES

24

BUS

FROM

OATA

I

..

....

I

)I

I

I I I I

II

'I

I

In

I

11

t15V

-c<

il

20

Ill

OPTION

Fziik-

I

1-

I

<

270

Ll

KC:

030

SERIES

INDICATOR

t5V

do

LLI READBACK

POWER SUPPLY DECOUPL ING

U

-

t

II

-

R13 215

tE?II

I

FILTER SWITCHES

r

DRIVER

7

--

IF

i15V

FLZ

REG

FF

01

5

01

12

01

13

01

''

-\

t15V

t15

IF21

E

1

(FlI

2

7

&--

lo

d.-

15

dL

5d0

ATTEN 4ILI

OdB

ATTEN 4ILl

NC

15d0

NC

IOdB

NC

ATTEN 4(Ll

ATTEN

4fLl

,

/

7

41

2nd

PASS FILTERS

R42

2150

R4B

2150

R43 2150

STAGE BAND

SWITCH

7

ILI+

+FLl SWITCH (Ll

I

-15V

(Fll

FILTER SWITCHES7

ai1

3

Za

-

19

la

- -

R49

100k

(Fl) -15V

I

U5B

-

U5A

3

(Fll

I

(CMOS1

*

ICMOSI

7

NC

4

__

-@-

-

ai0

..

::

4,

R33

1210

AMPLIFIER

3348

GAIN

t15V

LF

11

2150

-

I-+

/

0.OlU

13

I

I I

I

'

I I

I

ABSOLUTE

VALUE

DETECTOR

IF

RMS

a

SQUARER/ DIVIDER

DETECTOR

-

CURRENT

t5V

(FI

t15V

(FII

:B

I

I I

I

\

To.1~

I

P/O A25

I

I!

TO

A5

VOLTMETER ASSEMBLY

P/O

J2

I

,I

-15V

LFll

IF21

I

R46

2150

-

R47

464

'-

I

ss7

8G-

17

Ser

v

I

ce

A6

I

ANALOG ALC

I

A

REF

TP2

T

J2

I

FLATNESS

UP1

IF

B

J3

I

J4

I

-

t5V

__c_

-

COMF

-

c1 c2 c3 c4 c5 C6

c7 C8 c9 c11 C15

6

CI C17 C18 c19 c20

c21 c22 C23 C24 C25 C26 c29 C30 C32 C34 C38

c37 C38 c39

X,Y

8.2 8,2

A.

8.1

8.

0.1

8.2

8.1

8.2

8.2 8,2

B,2

8.2

A.2

8.2 A.2 A.2 A.2 A.2 A,2 A.2 A.2 A.2 A2

1

A. A.2

A.3

A,2

COMr

CR6 CR7 CR8

I

CR9 CRl(

1

CRlt CR21

J1 J2

L1

L2 L3 L4 L5 L7 L8

01 02 04 05

06

07

a8

013 014 015

016

c40

C41 C42 c43 C44 c45

C46

c47 c50 C51 C52

c53

I

\

-15V

IF1

ti5V

I

IF1

\

ua-9

DIGITAL

GNU

c55 C68 C69

A2

A.2

4.3

4.2 4,2 4,1

4.3

4,l

4.2

3.2

3.3

4.2

4,3

017 018 019 020

021

031

R1

R2

R3

R4

R5

R6

R7

R8

Component

A.2 A.2 A.3 A.3

A.2 A,2 A.2

A.l

A.1

8.2

A,l

8.1

8.1 A.3

A.3

A,1 A.2 A.2 A,2 A.2

8.2

A.2 A.2 A,3 A.3 A.3 A.3

A.3 A.2 A.2 A.2

A.l

8,I

8.2

A.2

Coordinates

-

COMl

-

R9

R10

R13 R14 R14 R15 R15

RI

6

R17 R18 R19

r20

R21 R22 R23 R24 R25

R26

R27 R28 R29

R30

R31

R32

R33 R34 R35 R36

R37 R38 R39 R41 R42 R44 R46 R49

R50

R51

R52 R54 R55

R56

R57 RSB

R60

X,Y

8.2

8,2

8.2

8.2 A.2 A.3

8.2

A,2 A,2

8.2

8,2

A2 A.2

A.2

A.2 A2 A.2

A,2 A.2 A,Z A.2 A.2

A.2 A.2 A,2 A,2 A2 A.2 A,2

A.2

A,3 A.2 A.2 A.2 A.2 A,3 A.2 A.2 A.2

(1

of

COMF

R61 R67 R63 R64

R65

R66

R67

R68

R69

R70 R71

R72

R73 R74

R75

R76

R77

R78 REO

R81

R82

R87

RE8

R124

R126

R128

Tu1

TP2

U1 U2 U3 U4 U5

VR2 VR3 VR4

2)

Model

89018

A6

-

I

A

I

Component

Locator

B

I

A54

IF

AMPLIFIER/DETECTOR

LEE

REVERSE

SIDE

SERIAL PREFIX:

23141

TO

ss7

2636A

I

8G-

18

I.

SEE TABLE DIAGRAM NOTES.

NOTES

84-4

FOR SCHEMATIC

-

/

DALC DEFEAT (HI

+15VlFl

A9

RESISTOR DRIVE AWFL:'IF?

7

i:;ES;i;a

R39

\

-,

I-

OW

CONIiOL AND

LEV:-

AW.:FIER

VR2

COUPARISON

-\

c39

DEUOD

CARR

lP2

7

LEVEL AUPLIFIER AND CARRIER FILTER

0

7

ilSVIF1 +I5VlFl tl5VIFl

AVG IF LEVEL OUT

I

i

CURRENT VARIABLE AMPLIFIER

-15VlFl

I

+I!

I1

---SETTING CIRCUIT\

1

<*2)

TI

<Js>

I1

Y

I I

I

PI0

J6

I

'>

I

IF

AMPLIFIER

I I

I

L3

RI

C4

2oQ

<JI)

C6

4.7e

L5

-9

-,

FILTERED

TO BUFFER

7

FM

IF

AU

IF BUFFER

IF

+151(lFl

R7

1000

t

-I!

348

DIGITAL

INTEGRATED CIRCUIT

VOLTAGE AND

GROUND CONNECTIONS

ssO

8G-

19

ANALOG ALC

J2

UP1

I

IF

FLATNESS

J3

J4

Service

-

COMl

-

c54 C56

c57 C58 c59 C60 C61 C62 C63 CB4

C65 C66 C67 c70

CRl: CRlr CRl! CRll CRl; CR15 CR2l

CR2:

J3 J4

L9

L10

Q9

a1

0

a1

02

a29

Q30

8.1

8,1

8.2

82

8.2

8,2

82

8.2

A.2

8.1

6.1

8.2

8.3

8.1

8.2

8,2

8,3

A6

Component

X,Y

8.2

8,2

8.2

8,2

8.2

A.3 A.3

8.2

8,2

8.2

A.l

B,3

8.2

4,2

Coordinates

COMF

(2

of

2)

X,Y

COMP

Model

89016

RE9 R90 R91

R92

R93

I

-15V

\

IF)

I

t15V

IF1

ua-9

DIGITAL

GNn

R94 R95 R96

8.2

8.1

8.2

8.1

8.

I

8.2

-

8G-20

P/O

A6

AM

DEMODULATOR

ASSEMBLY

-_

(2

OF

__

2)

7

(08901-60186)

__

FM IF BUFFER

NOTES

-_

-

7

__

--

-_

__

I.

REFER

TO

TABLE

DIAGRAM

2.

THE DIAGRAM BELOW SHOWS

THE

OUTPUT

RATOR A6U7 IN DETAIL

84-4

NOTES.

STAGE OF COMPA-

FOR SCHEMATIC

PI0

CONTROLLER

PI0

*

TO LO

20

CONTROL

I

ANALOG

DIGITAL

GROUND

ONO

I

+5V-

I6

ts-

I

8

I

-+15VIFl

8-

-

ISV(F1

AKUK.7

rop

VIEW

00

cIucuIr

BOAR0

roP

VIEW

ID

08

ss9

BG-2

1

t1sv

t15V

Service

A4

1

JI

TP~

6ND

I

t

J2

A

lP2

DISC IN DISC

TP3

OUT

I

FLATNESS

UP1

I

FY

SENS tINPUT

B

TP4

lP5

1

J3

-

;OMP

-

c1 c2 c3 c4 c5 C6 c7 C6 c9 c10

c1

c12

C13

C14

C15 C16 C17 C18 c19 c20

CR1 CR2

DS1

J1

J2

MP1

Ql

Q1

1

020

Q30

R1

R2

R3

R4 R5

R6

R7

R8

R9

X,Y

A.2 A,2 A,3 A.3 A.3 A.3 A,3 A,3 A.3 A.2

I

A.2

A.2 A.2 A.2 A,2

A2 A.2 A,I A.l A.1

A.3 A.3

B.

A.1 A.1

B.1

A,l

A,2 A.3 A.3

A.3 A.2 A.3 A.3 A.3 A.3

A,3 A.3 A.3

COMF

R10 RII R12

R13

R14 R15 R16 R17 R18 1719 R20 R21

R22

R23

R24 R25

R26

R27

R28 R29

R30

R31 R32 R

33

R34

1

R35

R36

R37

R38

R39

R40 R41

R42

TPI TP2

A.3 A.3 A.3 A,3 A.3 A.3 A.3 A2 A2 A,2 A,2

A.2 A.2 A.2 A2 A.2 A2 A,2 A,2 A2 A.2 A.2 A.2 A2 A2 A,l A2

A.l A.1 A.l A,l A.1 A.1

A.1 A1

Component Coordinates

(1

of

2)

X,Y

COMP

Model

89018

A4

I

A

Component Locator

I

0

I

AM

\

SEE REVERSE SIDE

A6

DEMODULATOR

CONTROL

CIRCUITS

(2

OF

2)

~~

-

8G-22

I.

SEE

DIACRAY

TABLE

NOTES.

NOTES

8A-4

FOR

SCHEMATIC

10

A25

3THERBOARO

I890

----

AUDIO

-60

371

4

ASSY

I I

,-

I I

I

I I

STAGE

I

--

If

LIMITERS

Q

STAGE

2

,-

-\

STAGE

3

-\

TO

COUNTER

23

PI0

XA4

TP

I

""r,

+15VIFI)

+15V(F21

SS10

8G-23

-

2

-

3

Service

A4

I

A

I

8

I

1

Ji

TP~ ON0

I

t

I

J2

TP2

DISC IN DISC

I

TP3

OUT

FM

FLAlNESS SENS tINPUT

UP1

I

FH

023.

ARE YOUNTEO ON SPACERS

26.

28

TP4

AND

33

TP5

-15V

J3

IF1

-

;OMP

-

c2

1 c22 C23 C24 C25 C26 C27 C28 C29 C30

1

c3 C32 c33 c35 C36 c37 C38 c39 C41 c42

c43 c44 c45 C46 c47 C48 C50

C51

CR3 CR4 CR5 CR6 CR7 CR8

CR9

CRlO

I

CRl CAI2 CR13 CR14 CR15 CR16

DS2

X,Y

A.3

8.1 8,3

8.2

8.2 A.2 A.2 A.2

8.2 A.3

8.2

8,2

8,2 8,~

8.2

A.l 8,3 A.3

A.3

8.2

A.2 A.2 A.1 A.3

A,3

8.2

62

8,2

8.2 A2 A.2

8.1

COMP

J3

L1

L2

L3 L4

02

a3 04

05

a6

07 08

a9

ai

o

01

2

013 014 015

ai

6

01

7 018 019

021

022 023 024 025

a26

027 028 029 03

I 032 033 034 035

R45

R4G R47 R48 R49

R45

X,Y

8.1

8.2

A2

8.3

8.2

8,2

8.2

8.1

8.2 A.2 A.2

8.1

A,2

8.2

8.2 A.3 A.3 A.3

8.2

8.3

8.2

8.3

8.2

8.3

0.3

A.2

8.2

0.2

8.2

8.1

5.1

Component

Coordinates

COMF

R50 R51 R52 R53 R54

R55 R56 R57

R58

R55

R60

R61 R62 R63

R

64

R

65

R

86 R67 R68 R65

R70

R7i R72 R73 R74 R75 R76

R77 R78 R75 R80 R81 R82 R83 R

84 R85 R86

R87

R80

R

8Y

R50 R91

R52

R93

R54

X,Y

8.1

8.2

8.1

8.2

8.1

A.2 A.2

8.1

A.2

8.1

A2

8.2

A.2

B,1

A.2

8.2 8,2 8,2

8.2

A,2 B,2 8,2 8,3

8,2 8,2 8,3

A.i

8,2

B,3

A,2

A,?

8,3

8,1

A,l A.3

A.3

8,2

8.2

8,2

A.3

(2

of

COMP

R95

R96

R97 R96 R99

RlOO

RlOl

R102

R103 R104 R105

R106

TP3 TP4 TP5 TP6

VR1

2)

X,Y

8.2

8,2

8.2

A.2 A.2 A.2

8.3 8,3

A,3

8.1

A.1

8.1

8,-

8.2

B,2

COMF

Model

89018

A4

I

A

I

Component

Locator

B

I

A4

FM

DEMODULATOR

FM

LIMITER

(1

OF

2)

CIRCUITS

SSlC

-

8G-24

PI0

A4

r

I

I I

DEMoDUIATO_R-ASSEMBLY

FM

.-

/

7

UPPER CLAMP

+l5V,IF

(2

_-

OF

2)

(08901-60184)

--

7

I

,-

+15V(fIl

r,

J!

051

__

PRECISION LIMITER

+l5V(FIl

I

--

I

--

FM

OISCRIMINITOR

1

-_

CHARGE-COUNT DISCRIMINATOR

_-

Q

--

tlSV(FI1 +15VlFI) tl5V1F

-_

--

\

I

-_

--

-_

\

/

tl5VIF

I

--

FM OUTPUT

GAIN

AMPLIFIER

E

10.m

_-

-,

Q

tl5VlFll +15V(FII

-7

I I

NOTES

I.

SEE DIAGRAY TABLE NOTES.

0A-4

SCHEMATIC

I I

I

7

I

1

-INPUT

FU

OUT

I

WIT FILTERS

TO

AUDIO

P/O

A25 AUDIO

MOTHERBOARD

ASSEMBLY

(08901-60137)

--

TOIFROU

DE-EMPHASIS AND OUTPUT

AUOIO

-

pIo

xA4

I

,

1

<

I1

-

SQUELCH DETECTOR

CR15

Q

10000

.-\

31.61

IF1

-16VlFl

-

+I

5VlF

I

-

SQUELCH SWITCH

I

15;

DRIVE

Q

26.1

IF

I

-I!

13

I

-15V(FI

1

I

-5VlFI

PI0

A25

___

a22

BOTTOM VIEW

ss11

8G-25

AM

ON0

Wl-W2 AWPL

SEMI-RIGID

OUT

TP2

I

Service

A2

Component Coordinates

Model

89016

-

COMl

-

c1

c2

c3 c4 c5

15

AMPL

2

720

1

OUT

TP3

KHz

LPF

GAIN

KHZ

LPF

GAIN

MPl

I

/

I

C6 c7 C8 c9 c10

c11

c12 C13 C14 C15 C16 C17 c19 c20 c21 C23 C25 C26

C27 c29 C30 C31 c33 c34 C36 c37 C38

CRl CR2

J1 J2

LI

L2

L3

L4

L5

L6

X.Y

8.3 A,? A.2 A.2

8.1

8.2

A.3 A.3 A.1

A.3 A A.1 A,2 A.1

8.3 A.2

A.1

8.2 A,2

8.

8.2

8.2 A.2

8.2 A.3

8.2

8.3

8.2

A.3

8.2

A. A.1

8.3

8.3 A.2 A.2 A.2 A.2

COMP

L7

L8

L9 I10

I1

I1 L13 L14

MPI

.3

MP2 MP3

M P4 MP5 MP6 MP7

01

02

03

I

04 05 06 07

R1

R2

R3

R4

R5

R6

R7

R8

R9 R10 R11 R12

I

R13 R14 R16 R17 R19

R20

R22 R23

A,2 A.2

8,2 8,2

1

8,2

2

8,2

B,2

8.1

8.2

8.2 A2 A.2 A2

8.2

A.l A,? A,l

8,l

B,l

8.1 B,2

A,2

8,2 A,3 A,l A,l A,l A,l A,2 A,2 A,l

A,2 A,2 A,2 A,l

0,2

8,l

8,2 A.l A.l

8,2

R24

R26

R27

R28 R29

R30 R31 R31

R32

R33 R34

R35

R36

R37 R38 R39 R40 R41 R42 R43 R44 R45

R46

R47 R48 R49

R50

R51

RT1 RT2 RT3

TPI

TP2 TP3 TP4

u1

u2

u3

u4

u5

X.Y

H.1 A.2 A.2

8.2

A.1

8.2

8.1

8,2

A,2 H,l A.2

8,1

8.2

B,1

8.1

3.1 B,1

8.1

8.3

8.1

8.2

8.1

A2

A.l A.l

8.1

A.2

8.1

8.2

8.3

COMP

8G-26

-

.

Agilent 8901B Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual