Agilent 8901B Service Manual

$JLOHQW7HFKQRORJLHV,QF (0LVVLRQ /LEHUW\/DNH:$

-XQH

ZZZDJLOHQWFRP

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.

6LQFHUHO\

5HEUDQGLQJ7HDP

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

>I

I I I

I

I I

I I I

I

\

I I I

I

I I

I

I 1

I I

K

I I

B

-++&

(SEE NOTE

FOR OPTION

.w-r\

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

<I-

4RD

77\

13

I

Pi0

220

l~

I

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

::3

I

+.

2

~tx

R36

IOU

I I

0.047u

I

cw

R13

lOOk

CRI

'

ILI

CR2

F2 ICUOSI

~

'2

,-

AMPLIFIER

a

2

.-,

,-

ATTENUATOR

2

-,

,

<r'z)

4MPLIFIER

<Jz>

3

+

l5Vo

.:%

I

-151

I

-

T

CIO

E20Dp

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

-

.

-

3

Service

A3

Component

I

1

r

ANALOG

GNU

lP2

TPl

MOO

ON0

OUT SENSE

n

$U

TP3

OE-EM

OUT

TP4 lP5

FLTR

OUT

AUOIO

RANGE

v

I

1

UP1

-

2

-

3

-15VIFll -15VIF2l

tl5VlF21

t15V

IF11

-

:OMP

-

c1

c2

c3

c4 c5 C6 c7 CE c9 c10 c11 c12 C13 C14 C15 C16 C17 C18 c19 c20 c21 c22 c23 C24 C25 C26 c27 C26 c29 C30 c3t C32 c33 c34 C36 c37 c39 C40 C41 c42 c43 c44

c47 C48 c49

X,Y

--

A.3 A.3

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

8.2

8,2

8.2

A.2

6.2

A.2

8.2

8.3 B.3

8,3

B,3

8.2

A.1 A. A,l

6.2

8,2

B,Z 8,2

6.1

A,2

8,

A,2

6,

8.1

8.2

A.2 A.2

8.1 A.3 A,2

A.3

COMP

C50 C51 C52 c53 C55 C5G

c57 C56

c59

C60 C61 C62

C64

C65 C68 CG9 C70 c72 C73 c74

c75 C76 c77

CRI

1

CR2 CR3

CR4

CR5 CRG CR7 CR9

L1 L2

I

L3

I

MPI

a1

R1

H2

R3 R4

-

x,v

-

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

8,2

8.2

8,2

A,2 A,2 A,2

8,3

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

8,2

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

8.1

8.1 A.2

8.1

B.l B.l

B,3

8.3

0.2

6,3

6.1

6.2

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

__

:OMP

-

R5 R7 R8 R9 R11 R12 R13 R14 R16 R17 R18 R19 R20 R21

R22

R23 R25 R26 R27 1328

R29

R30 R31 R32 R33 R34 R35 R36 R37 R3E R39 R40 R41 R43

R44 R45 R46 R47 R48 R49 R50 R51 R

5.2

R53 R54

Coordinates

-

x,y

-

B,Z

A,l A.1 A.1 A.1 A.l B,l A.2 A.2 A.2 A.2 A.3

8.1

8.2 A.2 B.1 A.2

8.2 A.1 A.2 A.2

8.2

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

-

COMP

-

RSS

R56 R57 R

59

R60 RGI R62

R63

R

64

R65

TP1 TP2 TP3 TP4 TP5

u1

uz

u3 u4

u5 U6 u7 UE U9 u10

vi

u12 U13 U14 U15 U16 U17 U18 u19 u20

U21

U22 U23

VR

VR2

VR3 VR4

X,Y

A,2 A,2

B,3

8,3

8,2

8.2

6.1 A2 A,2

A,t A.1

A,l A.l El

A.2 A.2 A.2

8.1 B,1 B,1 A,2 A,2 A,2

A,3

1

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

8,2

8,2 8,2

COMP

VR5

8,2

8,2 8,3

1

A.2 A.3 A.3

A.2

Model

89018

A3

i

A

I

Component

Locator

B

I

A2

AUDIO

FILTEAS

-

ss12

8G-28

Service

Model HP8901B

All

Serial Prefixes

2514A and above

261

9A

and above

CHANGES

On the

0

08901-60009

0

L2, L3

On the Component Locator:

0

L2, L3

On the

0

C4, C6,

0

C48, C53

0

R1,

0

R4

0

-

R36

On the

0

08901-601 16

ASSEMBLY to 08901-60116.

A3

Schematic:

-

Use the partial schematic on page 86-28.3.

-

On the left side

-

Change L2

A3

Schematic:

C47

-

Change

-

Change the value

R29

-

Change the value

-

Change the value

-

Change the value

A25

Schematic:

-

Change the

to

of

L3,

the

of

R4

of

the

and

value

of

to

R36

part

~ ~~ ~

schematic, change L2 to L3, and change L3

change L3

of

C4, C6 and C47

C48 and

R1

and R29

12.5

to

7400.

number

k.

to

L2.

C53

to

of

the A25

to

3900pF.

25

k.

to

0.03pF.

AUDIO

MOTHERBOARD

to

L2.

Errata

On

the

0

R51,

R55

of

R51 and R55

A3

Schematic:

-

Under lNVERTING/NON-INVERTING AMPLIFIER, change

to

1

k.

the

value

rei:.

15JUhT90

SS13

86-28.1

Model

OW FILTER

I

.

-

8901B

PASS

7

AUOIO RANGE DETECTOR

ABSOLUTE PEAK DETECTOR

CR4

U

n

Service

FLT OUT

TP

4

-

7

300 kHz POLE

I

OOP

J-

T

'-\

R20

51

IO

+

c43

SOP

1000

7

15VlF2)

rs

14.7k

0.047# VR4

R32

R28

6250

0,

r

50uS

-

PHASE MODULATION INTEGRATOR

C72

6.8~

56.2k

VR2 VR3

6.81V 6.8IV

7

75rs

R36

7500

R37

6250

2531s

5.1

IV

R65

31.6k

75OUSlL)

L

0,

7

1

-

*-\

3

OFFCL) PRE-OISP ONIL:

I

PRE-OISP OFF(1

I

d

+3.4 TO +3.8Vds

DE-EMPHASIS BUNDLE

LOW

PASS

FILTER CONTROL BUNDLE

DATA BUNOLE dO(H).dllH).d3(H) SELECT BUNDLE

--

/

'3

/5

k

73

--

.,,,,?

NON-INV(L) .IN!

\

+15V(F)

R39 4220

R40 316

I

-L

/

s=Z(Ll.5lL).71L)

--

-- --

/

'3

Lh

--

A3 AUDIO DE-EMPHASIS AND OUTPUT ASSEMBLY (P/O ERRATA)

SS13

8G-

2

8.3

0

A25 AUDIO ITHERBOARD iSEMBLY

18901-601371

PI0 A25

--1

FILTERED

AUOlO

12

FROM FlLTERS

AUDlO

J

2

I

,

I I

I

43VlFl DE-EMPHASIS

AND

NOTES

I.

SEE

DIAGRALI

TABLE NOTES.

84-4

I I I I I

DE-EMPHASIZED

I

OUTPUT

I

11

I

TO

I

VWTYETER

I I I

I I

I

I I

I

!

I

TO VOLTUETER

e

14

15

-

PHASE YOOULATlON INTEGRATOR

CT2

I-

-

,-

AUDIO

RANGE DETECTOR

ABSOLUTE PEAK DETECTOR

Q

-\

-

R21

2WO

VR2

VR3

6.w 6.81~

7

I

-

-\

"0N-IWYILI.INYlLI

/

I

'2

,

I,

AUDIO

RANGE

7

TP5

R63

1000

\

AUDIO LEVEL

RANGE

ILJ

I

SCHEMATIC

INSTRUMENT

FROM

24

BUFFERED BUFFERED SELEtT

AND

DATA

OECODED

ENA~LE

nus

CONTROLLER

I

II

I

\

,

I

=llL~.2lLi.51L1.61LI.To

DIGITAL

INTEGRATED CIRCUIT

VOLTAGE AND

GROUHD

"I

1:

2

OVERVOLTAGE

I

10

\

,

'3

DE-EMPHASIS BUNDLE 2

LO#

PASS

FILTER CONTROL BUNDLE

DATA

BUNDLE aoini.diini.a31~1

SELECT

BUNDLE

, ,

,3

II

1

,

mini.dciHI

'2

,=~ILI.SILI.T~LI

3 3

I

,

10

t

,<

-

I

SOUELCHIOVERVOLTAGE REIDBACK CIRCUIT

I

STATUS

,

I

--

2B

I

---

dOlLI

TOlFROM FM DEMODULATOR

FILTER

SELECT

TO

AUDIO

FILTERS

12

--I

Pli

I

PI0

TO

CONTROLLER

REFERENCE

OFSIGNATIONS

U12-16 +16VIF21-

UI6-21.23 +SVlFI

CONNECTIONS

NUUBERS

t6VlFI

SS13

13

-I6

-14

-1

CIRCUIT

TW

ID

KWdO

40

BOARD

VIEW

00

0

00

06

sw

OUT

TPl

REF RAMP TP2

&

Am

lP3

vu

SENS TP4

AVO

OUT

1

RECT DET PK

AVG

OUT

SENS

TP5

RECT

OFS

AVO

OF5

OUT

TP6

--

PK PK

DE1

OFS

22

DET

CAP GND TP7

TPE

,

-

PEAK

DETECTOR

t5V

GND

61

Serv

Ice

-

>OMP

-

c1

c2

c3

c4

c5

C6 c7 C8 c9 c10 c11 ,212 C13 C14 C15 C16 C17 C18 C16 c19 c2u

c35

CRl CR2 CR3 CR4 CR5

CR6 CR7

CR

8

CR9 CRlO CRll CR12

L1

MPI

01

Q2

Q3

05

X.Y

8,2

8.3

8.2

8.2 8,2

8.2

A,

I

A.2

8.2

A2 A.2

8.2

8.1

8.2

8.7

8.2

8.3

A.3

8.3

8.2

8.3

A.2

8.2

8,3

B,l

A.2

8.2

COMP

06

07

R1

R2

R3

R4

R5

R6 R7

R8

R9

RlO

R11

R12

R13

R14 R15 R18 R17

R16

R19

R20

R21

R22

R23

R

24

R25

R26

R27 R28 R29

R3U

R31

R

32

R

33

R

34 R35 R36

R

37

R38

R

39

R40

R41

A5

Component

8.2

A.

I

8.2

B,2

8.2

A.2

8.2

8.3

A.2

8.2

8,1 8,2

A,2

8,2

A,Z A.1 A.2

8.2

A.2

8.2

A.2

8.2

62

8.2

8,2

8.2

8.1

8.2

8,2

8.2

Coordinates

X,Y

8,2

E,?

A,l

8,1

A,2

8.2

8,2

8.2

8.3

8,3

8.2

A.2

(1

of

COMP

2)

Model

89016

t15V -j5v

-

A5

I

A

I

Component

Locator

B

I

A3

AUDIO DE-EMPHASIS AND OUTPUT

SEE

REVERSE

SIOE

8G-30

/

AUDIO

PEAK DETECTOR

i

FROM AUOIO DE-EMPHASIS AND OUTPUT

I3

PI0

XA5

I

-

I

I,.

7

t6-4

m.=I:*=ElLl

,

FROM SELECT

DECODER

BUFFERED

DATA

I

9

dl

lHl.d0

I

1.2

(HI

,

'2

,

I5

DATA LATCH

,

,-HALF-WAVE RECTIFIER

7

CRT

LI

m

I

-R

-

AUDIO

I

SAMPLE

RI4

26

I

AVERAGE DETECTOR

a

1960

a2

AND

MOLD DRIVE

+16V

-

PULSE

Y

TIUING

/-ASUMUER ANQ FILTER\

c12

/

a3

R24

R26

\

AVG

OUT

R29

SI.,.

SELECTORS

-15v

SAMPLE-AND-HOLD SWITCH

i15V

I

7

BUFFER AMPLIFIER

\

I

I.

SEE NOTES. TABLEBA-4SCHEMATIC DIAGRAU

2.

THE OIAGRAU BELOW OUTPUT STAGE OF COMPARATOR

A5U4

IN DETAIL.

I I

DIGITAL INTEGRATED ClRCUIl

I I

VOLTAGE

CONNECTIONS

REFERENCE

AND

SHOWS

GROUND

62

mv

6,

THE

-

12

-

I4

-

3.

NOTES

PULSE

A6UO

Pl

(SHOWN

TIMING

BELOW1 FOR UONOSTABLE

OFF:

I

ON

:

1:

--

TRIGGER

-

IS

AS

FOLLOWS: YULTIVIBRATOR

131n.

1.

1OBm.i

I.

I

8.+m

-

2.4m

TOP

A6R

VIEW

I

RESET

I

I I I I

I

e

I5

I I

ss14

BG-3

1

Z,V

Z'V

Z,V

Z'V Z'V

Z'V

Z'V Z,V Z,V Z'V Z'V Z'V Z'V

Z'V

2'8

Z'V

z'a

&'a

'f

ON9-

AEt

'

A5It

I

Z'V

1'8

&,V

Z'V

ZW

Z'V

ZV

Z'V

z'a

Z'V

'f

no133130

'f

ON9

YV3d

ON9

IdH

-

Id1

ino

r

Bdl

ON9

Ldl

dV3

130

Yd

SJQ

130

Id

9dl

Iflo

130

Yd

S30

9AV

SA0

133M

5dl

Ill0

133

SN3S

SAV

Id1

ina

SAV

SN3S

nn

Ed1

dHVM

Zdl

43M

HS

81068

IePoW

rnl

ENABLE

FROU LO CONTROL

20

.

,

-

---

AUDIO

ASSEMBLY

I--

I

FROM

I

FROU

FROU POWER METER

I

FROM

AUDIO

I

AN0

OUTPUT

FRW AUDIO-COUNTER1 OISTDRTION ANALYZER

FROM DETECTOR

I I

I1

I)

8

2

4

6

1

6

3

I

13

MOTHERBOARD

(08901-60137)

RF INPUT(4

AM

DEMODULATOR

4-

2

DE-EMPHASIS

IF

AMPLIFIER1

I3

I

__

6

'?'(

26

3

RF

LEVEL

1

~

,

,.

,

I

11

RF GROUND FROU

10

30

31

<

24

3

8

26

34

II

I

I I I I 11

I/

I

10

FROM AUDIO AVERAGE OETECTOR

I4

I

AUDIO

1

I

PEAK DETECTOR

NOTES

I.

A5R

I

TOP VIEW

I:

I

I I

gg

PI0

A25

7--1

- -

-

TRUE

-

RMS

TO

OC CONVERTER

<J3)

IF

t16V

RMS

LEVEL OUT

-

RIB

IOU

UNED VEL

r'

ALC CURRENT

sw

OUT

,-

t16V

COUPARATOR

R8

1000

mv

I

#.

,

,.

SEE TABLE

2.

THE

OF COWARATOR

-

<t2.05

TO

t3.

I5

Val)

,

~

.-II.-FI~O(HI .=II.-FI~I(HI

~-II.-FI~ZIHI

3

,

IF RUB

RHS

TUNED LEVEL )\F

16

_I.

--.'

-16V

CHECK

-6V CHECK I 6

mv

CHECK

I

+16V

CHECK

-12

+4OV

CHECK

-11

OUT

LEVEL; 9 6

I

:'"

,

~

E8

0

6

I

T

,

GO-T

8L

~cuos~

-16V

-16V -16V

R68

287

*V

Qk

R76

1000

RAW

GENERATOR

GUAR0 TRACE

\;

I

I'

I

II

II II

I1

L-,

,

C3

0.1"

CR14

-1

II

n

II

I1

I

I1

I

tl6VIF

I

3-14

t16V

t5v

e

GNO

I

2

PEAK

-I4,

DETECT GND

-16V

a141

GND

I

SIGNAL

l4

I I I

I

I I

If

I

I I

I I I I

I1

I

11

I

I;

EA-4

OIAGRAM

SCHEUATIC

BELOW

A6U6

DIAGRAM

SHOWS

THE

IN OETAIL.

NOTES.

OUTPUT

STAGE

IIGITAL INTE .TAGE AN0

REFERENCE

lESIONATIONS

UIO-I2

UIJ

UI4

U15

U16

VI0

GR

TED CIRCUIT D

CONNECTID

NWBERS

-15V(FI +15V(FI

3

13

"

t5V

I6

+I

mv

I4

+I

mV

6

+z

12

I4

I6

t6v

4V

SS15

8G-33

Service

A52

I

A

I

B

I

1

-

ANALOG

2

ONO

A1

OIGITAL 6N0

-

t5V

[Fl

3

+lS(lF)

t15V -15V

-15VIFl

-

COMP

-

c1 62 c3

c4

c5 C6 c7

C8 c9 c10 c11 c12 C13

C14 C15 C16

C17 C18 c19 c20 c21 c22 C23

C24 C25 C26

C27 C28 C29 C30

C31 C32

c33

C34 c35 C38 c37 C38 C40 C41 c42

c43

c44 c45 C46 c47

X,Y

8,3

8.2

8.2 A.2 8,l

8.2

A.2 A,2

8.1

A.l

8.1

8.2

8,2

A.2 A.2 A.2

8.2

A.2

4,2 4,2 4,2

4.2

4.1

4,2

4.2

1.2

4,2

3,2

3,l

3,i

3,2

3,l

3,2

COMl

CR1 CR2 CR4 CR5 CR6 CR7

CR8

J1 J2

LI L2 L3

R1

R2

R3 R4 R5

R6

R7

R8

R9

R10 R11

R12 R13 R14 R16

R17

R18

R20

R22

R23 R24

R25

R28

1727 R28 R29 R30 R31 R32 R33

Component Coordinates

X,Y

8.1

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

A.2

8.1

8.3

8.2

8.3

8,l

8.1

8.2

8.1

A.2

8.1

8.2

8,2 8,2

8.1

8.2

8.2 A.2

8.2

A.2

A.2 A.2 A.2

COM

R35 R36

R37

R38

R39 R40 R41 R42 R43

R44 R45 R46 R47 R48 R49

R50

R51 A52 R53 R54

R55

R56

R57 R58 R59

R

60

TP1 TP2 TP3 TP4

TP5

U1

u2

u3

u4

us

U6

u7

U8

u9

u10 u11 u12

A.1 A.1

8.1

A.1

4.1

0.2

4.2

0.2

4.2

3.2

4.2

X,Y

A.2 A.2 A.1

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

A,2 A.1

A.l A.1 A,l

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

A.1 A.2

h.l

8.1

8.2

B.l

8.1

A.1

COMP

1114 U15

U16 U17 U18 U19

VR2

VR1

W 1

2

W

COMl

-

Model

89018

A52

I

A

I

Component Locator

B

I

~5

VOLTMETER VOLTMETER

CIRCUITS

(2

OF

2)

-

ss1:

06-34

fEXCEPT OPTION

UODULATION

AUDIO INPUT

BUFFERED DATA BUFFERED SELEtT. DECOOED ENABLE

':N%

BUS FROY CONTROLLER

"1

!I

',

OUTPUT1

0011

~

-

.

.- - . .-

MOTHERBOARD

..

ASSEMBLY

^^^^.

(UUYUl

J:

PfO

A25

I"

(1

dOlHl

I

OIIHI

2

d2lHl

3

d3lHl

4

-bUI

-

51

-

1

w9

21

30

I

/

I

!

r

a

SELECT OECOOER

+I5VIF

INTERNALIEXTERNAL SOURCE SWITCH

\

,

AMPLIFIER

I

8

/

a

AWL I OUT

c3

x3p====7

I

OOP

7

U19A

yOATA

iSV!FI

2

::

GNO

3

TP5

LATCHES-

-

c-00

R4

1000

I

0

-

TO

roo0

R5

IO00

&)

AUDIO

INPUT BUFFER

-

,

'1

R5t

21.51

51.1u

SCHMITT TRIGGER

NOTCH FILTER

I

*5V,IFl

AWL

I

HI

R29

R30

1000

,

AWL I LO

I

::woo

\

ILI

NOTCH FILTER

2

I

m

CR6

RMS

cw

I

-

":,"

11

IT

I

18

+15V

mv

19

20

I

'14

36'

I

:I

7<

i6d

r

DATA LATCHES-

I-

/

CCdNTER GATE CONTSCL

AUDIO

COUNTER

7

STAGE

.-\

1-

/-STAGE

2

7

Eo

RMS-TO-OC CONVERTER

tl5VIF

I

0

<-OOlO

TO

+OOIOVdC>

8

7

RIPPLE FILTER

j-g

4

R50

3a.3*

7

STAGE

4

7

I

7

R5

I

42.2u

\

AllUIO

COON1

I.

SEE TABLE DIAGRAM NOTES.

f0

A25

'IO

TO

I I

I

I I I

I

I I I I

I

I I

I

I I I I

I I

I

I I I I

I I

I

H

I

r

7

I

I I I I

I

I I

I

PI0

J2

I

I I

I

I I

I

II

I

I I I

I

TO

COUNTER

23

AN0 GRWND CONNECTIONS

REFERENCE

NOTES

86-4

SCHEMATIC

DIGITAL

INTE6RATED

CIRCUIT VOLTAGE

'9,

I

;I

6;;.

-15V

1<

Tf

I

TO CONTROLLER

24

TO COUNTER

-23

SS16

8G-35

MP2

+

-15VlFl

-

I

J1

UP4

MP5

IS

DBLR

FI

7m

TUNE

J2

Tpi

I

SHIELD-MP4-5

ON COMPONENT SIDE

IS

ON

CIRUIT

SIDE

+15V

IF1

O0LR

0LR

u4

IS

MOUNTED ON

SPACER

+&

IF1

GNU

TP2

J3

UP1

---UP3

--

15V

IF1

Service

-

:OMP

-

c1

C2

c3

c4

c5 C6 c7 C8 c9 c10

c11

c12 C13 C14 C15 C18 C17 C18 CI 9 c20 c21 C22 c23 c24 c25 C26 c27 C28 c29 C30 C31 C32 c33 c34 c35 C36 c37 C38 c39 c40 C41

c42

c43 c44 c45

-

X,Y

-

A.3 8,3

8.3

8.3 A.3 A.3 A.3 A.3

8,3

A.1

8.3 A.2

8.3

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

8.2

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

8.3 A.2

8.1

8.3

8.2

8.1

A.l

8,1

8.2

A2 A.2

8.2

A.2

8.2

8,2

-

:OMP

-

C46 c47 C48 c49 c50 C51 c52 c53 c54 c55

C56 c57 ,258 c59 C60 C61 C62 C63

CR1 CR2 CR3 CR4 CR5 CR7 CR8 CR9 CRl(

El E2

J1

J2

J3

L1 L2 L3 L4 L5 L6 L7 L8 LIO

-

X,Y

-

8.2

8,2

8.2

8.1

8.2

8.1

8.1 A,l A.1

8,2

8.1

A.2 A.2 A.2

A.2

8.2

8.2 B,Z

8.2

8.1

A.l

A.1

8.1

R.3

8.3

5.3

8.3 A.2 A.2 A.2

8.1

R,2

AI9

Component Coordinates

-

COMP

-

L11 L12 L13 L14

MP1 MP2

MP3

01

a2

03 04

R1

R2 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

R3

X,Y

8,1

8.2

8,2

A,2

8.1

A2

8.2

8,2 8,2

8,2

8.2

A.3 A.3 A.3 A.3 A.3 A.3 A.3 A.3

A.3

A.2 A,2 8,2

8.3

A.2

A2

A.1 A.1

8.1

5.1

8.3

A.2

8.2

I

A,l

COMP

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 R50

R59

R61

R62

R63

R64 R66

R67

R60 R69

R70

R71

R72

R74 R75

R76

R77 R70 R79

X,Y

A.2 A.2

A.2

8.2

A.2

8.2

A.2

8,2

A,2

8.1

A2

A.2

A.1 A.1

A.2

A.2 A.2 A.2

A.2

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

8.2

8.2 A.2

A.3

8.2

A,2

8.2 A.2

8.2

R.2

A.2

8.2

8,2

COMP

REO RE1 R

82

R

83

A85

R

84

R86

R87

R88

R89

R90 R91 R92 R93 R94 R95

R96

R97 R98 R99 RlOO R101 R102 R103 R

104 R105 R106

fj07

R108

r109

R1

IO

TPi TP2

u1

u2 u3 u4 u5 UG u7 U8

u9

u10

X,Y

8.2

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

A,2

A,2 A,2 A.2

8.2 8,2

8.2

8.1

8.1 B,2

8,2

B,l

8,2

A,l

B,l

A,l A,l

A,l

8,2

8,2 A,2

A,2

A.2

8.2

COMP

u11 u12 U13

U14

U15 U16 U17 U18 u19 u20

VR1 VR2 VR3 VR4

w1

W2 w4

Model

8901B

-

x,y

-

8.2 A.2 A.2 A.2

8,2

8.2 A,3

8.3 8,3

8.3

8.1

8,2

A.2

8,2

8.2

II

At9

I

A

I

Component

Locator

E

I

,

AUDIO COUNTER1

A52

\

DISTORTION ANALYZER

-

__

-

__

66-36

Model 8901B

Service

CHANGES

All

serial

prefixes

2406A to 2806A

2622A to 2806A

On the

0

W34, W54

Assembly on page 8G-36.3.

0

-

R34

ohm.

0

Delete the page number (8G-37) and replace

rev.

On the

0

C38, R21, R27, R86

C38 R2

R27 51.1 R86 51.1

On the

0

08901-60274

(2622A) on page 8G-36.4.

A19

schematic:

-

Add W34 and W54 as shown in the figure

-

On the partial schematic, page 8G-36.5, change the value

01

MAY88.

A19

schematic:

-

Make the following value changes:

loop

1

121

A19

Component Locator:

-

Use the A19

LO

Divider Assembly Component Locations

P/O

A19

it

with a revision date

LO

of

R34 to

Divider

750

of

On the

0

08901-60274

08901-60274.

0

Modify the appropriate portions schematics

8G-36.6. See

A19

schematic:

-

Change the part number

P/O

“All

A19

LO

Divider Assembly (2622A) on pages 8G-36.5 and

serial prefixes”

of

the A19

of

the schematic as shown in the partial

for a value change on R33 and R34.

LO

Divider Assembly to

rev.12APR89

ss17

80-36.1

Service

Reserved for future changes.

Model

8901B

ss17

8G-36.2

rev.12APR89

Model

8901B

w34

(OPTION

TO

INPUT

MIXER

003

(NOTE

ONLY)

Service

5

3)

PI0

SS17 A19

1e5

I

I>

IJ

LO

Divider Assembly

w54

(OPTION

n

OUTPUT

030

ONLY)

-5

TO

LO

INPUT

SYITCH

(Errata)

J13

54

rev.12APR89

5517

8G-36.3

Service

Model

8901B

5

u4

IS

W)U*TED

ON

SPACER

\

DBLR

IAL

E

*lSV

[Fl-

-

UP3

-15V

IF1

I

SS17

8G-36.4

TUNE

FLTA

om

I

WP2

PI0

A19 Component Locator for the 08902-60274

L15

IS

ON

CIRCUIT

SIDE.

board,

(2622A to 2806A)

1

I

reu.12APR89

,-DOUBLER

INPUT

FILTER-

-

'cr

1

0

b

k

v,

b

0

6

3

P

0. 0

e

P

tw

03

0

aa

b

L

(NOTE

-FILTER DRIVER

R25

R23

13.3k

,,

.,C61

--0.111

0

19

4.8

R20

1000

-

R22

7500 - 23.7k

CR 1

-5V

(F)

t

DIVIDER

9%2

7'l

15V

(Fl

*

-160-330

C64

+

DIV

$2 2qo

01u

I;,;

2 2u

2200P

0

0111

0

111

1

a

4)

1

WH2

-

1

16

C65

0

L5 L6

3x1

-

C66 7'1

-

'.

1u

A

I

h

FLTA TUNE

51n

R32

IOk

DIVIDEA

-ao-i60

L

'2

-

I

FF

MHZ

1.

L7

31a

2

-

14

*

-5V (F)

v

C67

0.ljl

A.

1

t(mv

-

A35

19.6

2

'3

Service

Model

8901B

#

OIV

OIV OIV

OIV

I

OIVIOEil

!-8

GATES

\

a

5V'lFl

490

:a00

0

TO

0

TO

2

:a00

AT

-5V

IF1

-5V

IF1

SAND

1-2

1

(HI

71

CI)?l

U98

0)

!ECL)

3

r109

511

-5V'IFl

+

1)

SS17

8G-36.6

PI0

A19

Lo

Divider Assembly (2622A

to

2806A)

rev.12APR89

Model 8901B Service

~~~

2909A

and

above

On the

a

-

A19

On the

0

-

A19

On the

0

-

A19

CHANGES

AI9

schematic:

-

Use SS17A with the revision date

A19

Component Locator:

-

Use the new A19 component locator on page 8G-36.9.

A1

9

Component Coordinates:

-

Use the new A19 (SS17A) component coordinates on page 8G-36.10.

~~ ~~

of

rev.OlAPR89.

rev.12APR89

SS17A

8G-36.7

Model 8901B

Service

L

m

I

n

WI

mu

n

0

d-4

I

r-

e

7

m

1

I

1

h

R87

R

R52

R28

-1

I

R961

J

rev. 12APR89

A19 Component Locator

for

the

08902-60126 board, (2909A and above)

SS17A

8G-36.9

Service

Model

8901B

-

COMF

-

c1 c2 c3 c4 c5

c10 c11 c12

C13 C14 C15 C16 C17 C18

1

c2 c22 C23

C24 C25 C26 C27 C29 C30

1

C3 C32 c33

c34 c35 C36 c37 c43 c44 c45 C46 c47 C48 c49 C50

1

C5 C52 c53 c54

c55

C56 c57

A1 9 Component Coordinates (2742A and Above)

-

COMF

-

C58 c59 C60 C61 C62

C63 C64 C65 C67

CR1 CR2 CR3 CR4 CR5 CR7

CR8 CR9 CR10

El E2

J1 J2 J3

L1 L2 L3 L4 L5 L6 L7 L8 L10 L11 L12 L13

R1

R10 R11 R16 R17

-

COMF

-

R18 R19 R20 R21 R22 R23

R24 R25 R27

R30

R31 R32

R33

R34

R35

R36 R37 R38 R39 R40 R41 R42 R43 R44 R45 R46 R47

R48 R49 R49 R50 R51

R52 R53 R54 R55 R56 R63 R64

R67 R68

R70 R72 R74 R75

-

COMP

-

R83 R84 R85 R86 R87 R99 R100 RlOl R102 R103

R104 R105 R106 R107 R108 RllO Rlll

TP1

u1 u2 u3 u4 u5 U6 u7 U8

u10 u11 u12 U17 u21

VR

1

w2

w4

SS17A

86-36.10

A19

Component Coordinates

-

for

the

08902-60126

-

board,

(2909A

and

above)

rev.

12APR89

Model

8901B

Service

Reserved for future

changes.

rev.12APR89

SS17A

8G-36.11

Service

Model

8901B

Reserved

for

future

changes.

SS17A

8G-36.12

rev.12APR89

rmn

m

vm

PI0

A28

MOTHERBOARD

ASSEMBLY

(08901-60229)

r-----

I I

XAl9

I

TI

I

t15V

I I

I

I I

-5v

4

81

I

i

1-

I

HF

I

HF

I

I I

I

RF

1

I

i

I

i

JI(l31

JI1281

J41121

J41271

JIllIl

J41291

I

3.-

i

<

I

!

II

I

I.

I

TINPUT BUFFER-

rPOWER SUPPLY

LI

9100-3922 +15VlFl

L3

9108-3922

- -

CI

T

lBBBP

L4

9100-3922

V

7

1000P

R17

2.87K

C17

-

118

!6I

+I

tSVlF1

R19

c15

l088P

t2.4

TO

R20 R22 10.0K

1.

80K 7.50K

lBP

-

UI

Clb

-

34.8

r3.I

Vds

-5VlF1 13.7:j 23.7K

nn

C71

1

6

-

U6

CIS

U9 U12

C21

DIV_B

C22

r

FILTER DRIVER

-

R25

~~y~

-

- -

U13 C23 C24 C25 C26

U14

N.C.

0IV.I

U15

DOUBLER INPUT FILTER

L5

33N

3'

-

1

R31

18.8K R39

-

- -

U17

Ul8

C27 C30

1

-

U20

I0.0K

RllB

I.

80K

1

L6

51N 33N

R32

178

-5VlF1

L7

FLTR

DBLR

TUNE

(NOTE

8-2.OR.OBL

a-

-

i;.

81

R35

19.6

-2.5

TO

-2.2 Vdc

61.9

"'::

61.9

R36

*iyiip

lc31

-5VlF1

2.4v

-

D

r

COUNTER DIVIDER

40-80 MHz

-

-5VlF1

-5VlF)

3

1

I

h-,

DIVIDER

40-80 MHz

U21B

11V-2

J

m

0

a

0

N

s

-5VlF1

178

a

U4

RI1

28U

HF

VCO

t8

TO

COUNTER

C3I

0.01u

I

-5VIF1

3-

I

-5VlFl

R44

68.1

DIVIDER INPUT CONTROL

a

-

I

YI

0'

z

4

m

L

(NOTE

41

I

@

(NOTE

51

OIVIDER.SIG.FLOY

178

9.1" (NOTE 61

(NOTE

51

CR7

+

(NOTE

81

B/DBLR/OUT

(NOTE

81

OBLR/OUT

a

H

.

DlVlOER

178

OUTPUT CONTROL

I

71

DIVIDER

F

10 - 20 MHz.1

5

-

10

MHz

I

-5VlFl -5VlF1

I

DIVIDER

20-40 MHz

I

II

5.6

4

(-0.01

I

TO

8

I

Vdo

R72

909

I-

II

El

E2

--

R83

I

IT

R63

r

1.25

WULT 1 1NOTE

00UBLER.ORIVER

DIVIDER

2.5 - 5

-

2.5

7,8

MHz.1

I

1

I

-5VlT1

31

MHz

68.1

R85

1-7

(NOTE

R75

I

70

3.1

OlVlOER SlGNAL

m

PATH

178

DOUBLER OUTPUT GATE AND

(NOTE

61

lB00P

L13

l00U

...

RlBl

R102 178

IAN0 DBLR (L)

+5VlF1

I

1-

HIGH

DIVIDER OUTPUT GATES

RlQ7

AB.

1

...

.

PASS FILTER

I

+5V(F1

-

c54

I

l000PT

08901-90114

1

I78p

,259

40

TO

80

a!

wz

LO

<r

TO

+3

d*

1

I

>

H

vm

TO

CMTER

23

+8

II

J

I

IC

I

+SVlFI

I

13

I

I I

I

I I

I

I I

I

I I

I

Ser'

reu.OlAPRS9

1Prefi240a4ar

SS17A

TAL

'-

Model 8901B

Service

2909A

and

above

CHANGES

On the A19 schematic:

-

A19

-

Use SS17B with the revsion date

On the A19 Component Locator:

0

A19

-

Use the new A19 component locator for SS17B on page 8G-36.15.

-

On the A19 Component Coordinates:

0

A19

-

Use the new A19 component coordinates for SS17B on page 8G-36.16.

-

of

rev.OlAPR89.

~~

rev. 12APR89

SS17B

8G-36.13

Service

Reserved for future changes.

Model

8901B

SS17B

8G-36.14

rev.12APR89

Model

8901B

m

Service

m

rev.12APR89

A

B

SS17B

8G-36.15

Service

-

COMP

-

C6 c7 C8 c9 C38 c39 C40 C41 C42

CR6

J4

Q1 Q2

Q?

Q4 Q12

A1

9

Component Coordinates

-

COMP

(2742A

COMP

and

Above)

Model

8901B

R2

R3

R4

R5

R6 R7 R8 R9 R13 R14 R15 R26 R28 R29 R57 R58 R59 R60 R61 R62 R66 R69 R71 R76 R77

SS17B

8G-36.16

A19

Component

Coordinates

for

the

08902-60126 board, (2909A

and

above)

rev.12APR89

i?

b/O

A28 RF

MOTHERBOARD

ASSEMBLY

(08901-60229)

-----

r

I

1

I

i

I

TTL TO ECL

LEVEL

IRANSLATOF-

t5VIFl

~DIVIOER-OISABLE/~

GATE-ENABLE DECODER

I

-1-

BANO

0-2

OR

BAND OBLRIH) OlVlOER INPUT CONTROI

I

GATE- ENABLE DECODERS

3

-

7

~

470

R26E

ECL

LVEL

TRANS LA TO^

TO

TTL

7

,

181-\11

R60

DIVIDER OUTPUT AND DOUBLER GATE DRIVE

+5VlF) +5VlFI

I I

I.

96K

R79

,

17Ao

a

00UBLER.ORIVE

17A

OlVlOER SIGNAL PATH

-

7

08901-90114

DIVIDER

1

1-8

GATES

a

1

I I

I

C38

l00P

1

BAND-1-L 10

u9c

I4

I

nn

BAND.2.H

-

7

470

R29F

I

-5VlF)

4,

II

-

I5

9

N.C.

R29B

-

BAND-1-23

I

-5VlF)

BAND 2 L

I

-5VlF)

-5VlFl

BAND 1 L

-5VlF)

BAN0.1.2.H

O1VIOER.SlGNAL.FLOY

I

BAND 4 k

\

DIV-4

I

-5VlFl

(NOTE

I'

-5VlF) -5VIF)

I

-5VlF)

R59 261 -5VlFl

VR4

*

J

I

-

9)

B/OBLR/OUT

01

VI

DER OUTPUT CONTROL

17A

I

II

170

470

UllC

I4

N.C. -5VlF1

'i

1

11

9

I3

~

S

10

31

R

-5VlF)

;"'

.c.

N.C.

lltR

...

lECL1o

CI

.

15 N.C.

5,14 N.C.

N.C. 10 N.C.

I

w.

68.1

I

-5VIF1

-5VlF1

LO OUTPUT FREOUENCY

IHHZl"

610-1388

320-640

160-320

90-

I60

40-90

28-48

18-28

5-10

2.5-5

1.25-2.5

NO

OUTPUT

I

FREOUENCIES SWWN BAND OVERLAP

OUTPUT

015ABLE

6

8

YAY

0

I V I

OUTPUT

LINE

YULT

OIV

OIV OIV

OIV

OIV DIV OIV 7 OIV NONE

ARE

OCCUR.

DER

I

0

I

2

3

4

5

6

B

NOMINAL:

0.00A

0.099

0.009

0.007

0.906

1.

no5

e.

004

0.003

0.082

8.991

9. 000

SOME

I

I I

I

I I

I

I I

I

SS17B

rev.OlAPR89

NOTES

I.

SEE TABLE Bt4SCHEVATIC

2.

SHOWN BELOW

6.10

MIXER

(NOTE

31

3.

H

vco

t8

TO COUNTER

I

I I

(NOTE

I

R68

61

I

RTO

60.

I

41

I I

SEE SERVICE SHEET5 AN0 REFERENCE DESIGNATOR.

6.

LB

IS

6.

THE

PC TRACE INOUCTNUE

INOUCTA~E

T.

INDUCTANCE

AND

A

11.

PC

DIWE

IS

A

TMCE.

IS

LEA0 A COYBINATION AN0

w

ERIALb

IS

*PPROX~~~\TELI

OIAGRAU

SCHEUATIC OF

FOR

CABLE

DIODE

-.Inn.

NOTES.

AI9U2.

COLOR

OF

4.6~

11

I

wu.

I

dVIF1

I I

TTL

TO

ECL

1.3

422

LEVEL

DLI

I I

I1

I 1 I

I

-TRANSLATOR

tSVIF1

I

I I

I

-1 I

I I I

NC

,

h

1211

6

16

BANO

DBLR (HI -6V1Fl

AND

TIHI

I

'8

'

10

LO OUTPUT OIVIDEF

OUTPUT

I I

I

DBLR

2

3

I

6

I

OUl&

DISABLE

YAY

OCCUR.

640-1300

320-640

180-320

80-160

40-80

20-40

10-20

E-IO

2.5-5

I

.25-2.6

NO

1

FREPUENCIES SHOWN ARE NOMIh

BANO OVERLAP

I

UULT

OIV

..

DIV OIV DIV DIV DIV OIV OIV

I

NONE

RIOT

68.

0

I

2

3

4

5

6

7

8

I

CONTROL SPECIAL

FUNCTION

0.009

0.008

0.007

0.006

0.005

0.004

0.003

0.002

0.001

0.000

;

SOME

I

I I

I

REFERENCE

DESIGNATIONS

NVYBERS

0

-1.16

-6VIFl

-

+6VIFI

-

-5VlFl

-

I1

0

I

16

ss17

8G-37

I

A

JI

NO

HF

OUT

OF

I

J2

SAMP

AWL

TPI

1

/

B

OFS EFF

I

*PI

I

C

JI

n

I

J2

n

D

I

-

2

HEATSIW

ON

08

w3

-

3 3

-

2

-

;OMP

-

c1 c2

c3

c4 c5 C6 c7

1

C8 c9 c10 c11

c12 C13 C14 C15

C16

C17

C18 c19 c20 c21 c22 C23 C24

c25

C26 C27 C28

c29 C30 C31 C32 c33 C34 c35 C36 c37 C38 c39

c40

C41 C42 c43 c44 c45

CR1

X,Y

A.3 A.3 A.3

A.3

A.3 A,l A.2

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

8.1

8.2

8,2

8.2

A.2

8.2

8.1

8.2

8.1

8.2

8.3

83

A,3

8.3

8.2

A.2

COMF

CR2 CR3 CR4 CR5 CR6

CR7 CR8 CR9 CRlO CRl 1 CR12 CR13

CR14 CR15

DS1 DS2

J1

J2

L1 L2 L3

L4

L5 L6

L10 L11 L14 L15 L16

MP1

M P2

MP3 M P4

MP5

ai

a2

Q3 04

05 06

07

08

X,Y

A,3

8.2

A.2 A,2

8.2

8,1

8.3

8.1

A.1 A.1

A.1

8.1

A.3

A.3 A.3 A.3 A.3 A.3

8.3

8.2

8.3

A.3

8.1 A.2

8,2

A.3 A.3

A,2 A.2

8.2

8.2 A.2 A.2 A.2 A.2

COMl

09 010 011

012

R1 R2

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 R33 R34

R35 R36

R37

R38

R39

R40

R41

R42

X,Y

8,2

8.3

8,3

A.3 A.l

A,l A,1 A.2

A.2

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

8,2

8,3

8,.

8.1

8,2

A2 A.2 A.2

8.2

8.2 A.2

A.2 A,l 8,2

3.1

3.2 3,2 B,2 B,2

B,2

4,3 3,2 B,2 B,2

COMP

R43 R44 R45 R46

R47

R48

R49

R50 R51 R52

R53 R54 R55 R56 R57 R58 R59 R60

R61

R

62

R63

T1 TPl

u1 u2

VR1 VR2 VR3

VR4

VR5

w1

X,Y

8.2

8.3

8.3 8,3

8,2 8,3 8,2

B,1

8,3

8.1

B,l 8,3

8.3 8,3

8.3

A.3

8.1

8.2

8.1

A,2 8,3

8,2

8.1

8,l

8,3

A.2

COMF

-

COMP

-

c1 c2

c3

c4

c5 C6 c7 C8

c9

c10 c11

c12 C13 C14 C15

C17

C16

c19

c20 C21

c22 C23 C24 c25 C26 C27 C28 C29 C31 c32 c33 c34 c35 C36

CR1 CR2 CR3 CR4 CR5

CR6

J1 J2

11

12

X,Y

D.3

c.3 c.3

D.3 c.3 c.2

D.2

c.2 D.2 c.2

D,2

C.2 c.2 D.2

D.2 c.2

D.1

c.1

D.1 c.1

c.1

D.1 c.1 C,l c.2 C.2

D.2

0.2 c.2 C.2

c.2 c.2 D.2 D.2 c.2 C.2

c.1 D.1

D.3

c.3

COMP

13

14

15 16

17

18

MPl MP2 MP3 M P4 MP5 MP6

01

a2

03

a4

05

06

a7

08

R1 R2 R3

R4

R5

R6 R7

R8 R9 R10 R11 R12

R13

R14 R15 R17 R18

R19

R20

R21 R22

R23

R24

R25

Component Coordinates

A24

Component Coordinates

A23

Service

Model

89016

A23 A24

I

A

I

B

I

Component

Locators

r

C

I

D

I

-

A19

LO

DIVIDER

-

ss171

8G-38

Model

All

serial

8901B

prefixes

CHANGES

~

On

the

A23

schematic:

0

R4

-

Under SAMPLER AMPLIFIER change the reference designator R4

R54.

Service

to

rev.01

JUL91

SS18

8G-38.1

T-i;

T

*

DIVIDER

17

HF VCO TUNE

L

I1

II

I

mk

I

VI

I

R7

I

19.6k

1-15"

_yh

,I

POWER

a+

R6

1210

CRK

-1

5VIF

SUPPLY DECQUPLING

11

'<-8.5

+12.5

TO

-6.6

TO

VdC>

+I42

Vdc>

t15VlF21

TP2

CI

33"

I

NOTES:

I.

SEE TABLE

2.

A23LT

CIRCUfT'hUfTORS.

3.

INDUCTANCE IS APPROXIYATELV

4.

SHOWN BELOW

AN0

I

8A-4

SCHEMATIC DIAGRAM NOTES.

8 9 I2

13

IS

A23U2

TOP

00

I

13

VIEW

A

U2

0

--

AND

A2+LO.IO

SCHEYATIC

ARE PRINTED

4.5uH

AT I YHI.

OF

A24UI

I

A2309

OIOD2

TOP VIEW

0

GI

--

52

SSlB

8G-39

Ser

v

i

ce

A22

Component

Coordinates

Model

89016

-

I

A

I

B

I

>OMP

-

c1 c2 c3 c4 c5 C6 c7 C6 c9 c10 c11 c12 C13

C14 C15 C16 C17

C18

c19

c20 c21

c22

C23 C24

C25 C26 C27 C28

CR1 CR2 CR3 CR4 CR5 CR6 CR7 CR8 CR9

CRIC CRll

CR12

CRl?

CR14 CRlE

E

CRI

El

X,V

8.3

8.2 8,2

A.2 A,3

8.2 A2

8.1 A.2

8.2

A.2

8.3

A.3

8.3

8,2 8,2

A,2 A.2

8,2

A.2

B,Z

8.2

A,,2

A.l

8.1

8.1 A.l A.1

8.2

8,2

A.2 A.2

8,2

8.2

A.2 A.2

8.3

A.3

8,3

A.3

8.2

COMP

E2

J1

L1 L2 L3 L4 L5 L6 L7 L6 L9

L10

MP1 MP2 MP3

01 02

03

04

05

Q6

07

Q8

09

R1 R2 R3

R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15

R16

R17

R16

R19

X,Y

A.3 A.3

A.3

A.2 A.3 A.3

A.2 A.3

A,3

8.2 A,1

8.2

8.2 B,3

A.2 A.2 A.3

8.1

8,2

A.2 A.1

8.1 A.2

8.2

A.1 A.1 A.

I

A.2

8.2

A.2

8.2

A,3

8.3

8.2

8.2 B,3

8.2

8.3

8.2 A.2

8.2

COMP

R20

R21

R22

R23 R24 R25 R26 R27 R28

R29

R30 R31 R32 R33 R34 R35 R36 R37 R38 R39

T1 T2

TP1 TP2

Y1

Y2

J

I

A22 A2

I

A

I

n

r)

I

Component

Locators

1

SEE REVERSE SlOE

A23

SAMPLER

A24

HIGH

FAEOUENCY

VCO

SS18

--

~

-

8G-40

Model

All

serial

8901B

prefixes

0

On

E

the

-

Change

CHANGES

A22

schematic:

the

value

of

A22L2

to

Service

1.2uH.

rev.01

JUL91

ss19

8G-40.1

PI0

A28

F

MOTHERBOARD

SSEMELY

38901-

60_22_9

-15v

)

7

A22

LOW FREQUENCY

I--

-

POWER SUPPLY-

DECOUPLING

VCXO

--

I-

ASSEMBLY-~08901-6000_7~

c2

2.2"

'-

9.26 MHz

--

XTAL OSCILLATOR

__

(-5.2 TO -4.2 Vdc>

L

YI

9.26 YHz

7

--

\

I

__ __

DOUBLE BALANCED MIXER

a)

,--

LIMITER

7

I

.4

72

TO

SQUARE

I

-_

.8

VP-P WAVE s I

lOnS

--

\

-

2

UHI

FILTER

__

LOW-PASS

<-I I

.o

-

TO

-10.3

var

-_

--

__

-_

--1

I

A21

LOW

FILTER ASSEMBLY

I-

OUTPUT

AMPLIFIER

-\ /

2

UHZ

BANDPASS FILTER

I--

FREQUENCY VCXO

I

LF VCYO VCXO

IN

JI

@W38

I

LI

c2

(08901

__

L2

-60025)

c5

--1

'I

OUT

I

J2

I

!O

FROM

LO

CONTROL

I

'<

5

I(r2

t-

TO

t37

t4OV

Vdc>

.

I

ANALOG

I

4

000

I-

R8

4640

c4

+

11.26

UHI

XTAL OSCILLATOR

Q

R13

464

I

CR3 CR7

+~1%

RIB

75

L4

4.7"

I

.2"

\

<-5.2

TO -4.2 Vdc>

-

TPI

7

BUFFER

Illy

et

R

-7

R26

51.1

-

FREQUENCY

r~~~~~NA~~~~

7

"I

"

SCRIM

NOTES

1.

PREFIX:

230SA

SEE

TABLE8&-4SCHEMATIC DIAGRAM NOTES.

__

ss19

8G-41

I

TRK

OF5

"\

'i:

A

rT

I

iir

B

I

i'

Ser

v

I

ce

-

>OMP

-

c1 c2

c3

c4

c5

C6 c7 C8 c9 c10 c11 c12

C13 C14 C15 C16 C17 C18 c20 C24

CR1

CR2

CR5 CR6 CR7 CR8 CR9 CR12 CR13 CR14 CR15 CR16

CR17 CR18 CR19 CR20

CR22

CR24

CR25

DS3

DS4

L1 L2

L3

A20 Component Coordinates

X,Y

A.3

8.3

A.3 A.3

8.2

A2 A.2

8.2

8.1 A2

A.3 A2 A2 A2

A.2

A2

A.1

4.3

4.2

3.2

3,2

3.2

$,2

42

3,2

3.2

4.2

4,2

3.3

COMF

MP1

01 02 Q3 04

05

06

07

08

09

010

01 1 012

019

01

3

020

021

Q22 023 024 026 027

Rl

R2 R3 R4

R5 R6 R7 R8 R9 RlO R11 R12 R13

R14

R15 R16 R17 R18 R19

R20

R21 R22

R

23

X,Y

8.1

6.1

8.1

6.1 A.2 A.1 A.1

A,2 A2

A.2

A.2 A.2

A2

A.2 A.3 A.3

A.l A,2

A2 A.l A2 A.3

A.3 A.3 A.3

A.3 A.2 A2

A,3 A,3 A2

8.2

A,2

8.2

8.1

A.1

A.1 A.1 A.1

COMl

R24

R25 R26

R29 R30

R31 R32 R33

R34

R35 R36 R37

R40 R42 R43 R44 R45

R46 R47 R46

R51 R52

R57

R56

R58

R59

R60

R61

R70 R71

R72 R73

R74

TP1 TP2 TP3 TP4

u1

U2

u3

u4 U5 U6 U1U U12

(1

of

2)

(2627A

X,Y

A.1 U13 A,l

A.l U23

A2 A2 A.2 A.2 w1 A.2

A.2 A2 A.2

8.2

8.2 A.2

8.2

8.2 A.2 A.2

A.2 A2 A.2

8.2 A.2 A.2 A.2

8.2 A.2 A.2

8.2

A.2 A.2 A.2

A,l

A.l

3.1

4.2

3.2

3,2

COMP

k2

4.3

3.2

8.2

U14

VR

1

AND

ABOVE)

Model

89018

I1

A20

Component

Locator

-

B

I

A21

LOW

SEE

A22

LOW

REVERSE

FREQUENCY VCXD FREQUENCY VCXO

SIDE

FILTER

~

-

80-42

Service

CHANGES

On the A20 schematic:

0

RX - Change the value

On the A20 schematic:

0

A20R 19-R26 - Make the following value changes:

of R47

to

Model 8901B

26.lk.

R19 R20 R2 R22 R23 R24 R25

R26

1

61.9k

28.7k

13.3k 6190 2610 46 4k 237k

121k

On the schematic:

0

Use SS20 (2627A) on page 86-44 and 8G-45.

On the Component Coordinates:

0

CR2 1 - Add CR2 1 A, 1 to the coordinates.

On the Component Locator:

0

CR21,C7,C19 - Add CR21 between R35 and R36 with the

10.

polarity nearest Q

C

between

12 and R 16.

Add C7 between U 12 and U2

On the schematic:

1.

Add C 1 9

rev.ISDEC87

0

R35, CR21, R32 - On the lower left portion of the schematic, next to DATA LATCH, locate R35 and change the value to

3.48k. Add CR21 between R35 and Q8A with the anode con-

necting to R35 and cathode connecting to Q8A. Below Q8A

of

change the value

0

On the lower left corner of the schematic change the serial

to

prefix

"2804A and above".

R32 to 9.09k.

ss20

86-42.1

FROM

AM

OEYODULATDR

1

I I

FROM

SAMPLER

II

I

!I

I

4

HF

vca

TUNE

6k

h

7VOLTAQE REFERENCE-

FROM

SHEEP

PROGRAMMER

t5V

1

t3.9

TO

t4.1

Vdc>

2150

-15V

E11

0.01u

BIT

D4C

2

(HI

10

3

(HI

9

4

IHI

5

IHI

7

[HI

32

128

r

i

il

I

i

I

ii

I'

I

e----

HF

VCO TUNE

INPUT

I

32

I'

II

~

TO

SAMPLER

,

a

I

I I

,~

r

NOTES

1.

SEE TABLE

2.

USE HEATSINK WHEN SOLDERING

O9.010

Sa

REFERENCE

DESIGNATIONS

8-6

GODO

G

INTERGRIT

VOLTAB

GRDUNO COI

u2

u3

U19

U1d.

23

SCHEMATIC

01

1

OS

CIRCUIT

,NO

CTIONS

NU M B E

t15V

-

-15V

-

+l

-

+5

+2-7

t5

-

+2-0

tlSV

-

-15V - 4

DIAGRAM

NOTES.

A20U13.14.

08

AoDooB

R

S

13

3

34

-

14

I

16

1

13

ss20

8G-43

lP1 6N0

e

ANALOG

GND

hj

-7.5v-

-15V-

DIGITAL-

GNO

4

SQUARE

PADS

DENOTES CATHODE

ON0

/

-

TRK

1P2

FLTR

40v

?

t4OV

t5.lV

I

TPJ

LF

r?

VCXO

\

NhE:

05.

20.

22.

I

23.

26.

27

ARE MOUNTED ON HEATSINKS

TP4

HF

TUNE

t5v

VCO

MPl

I

Service

-

:OMP

-

c1

C2

c3

c4

c5 C6 c7 CB

c9

c10

c11

c12 C13 C14 C15 C16 C17 C16

CR

1

CR2

CR3 CR4 CR5 CR6 CR7 CR8 CR9 CRlO CR12 CR13 CR14 CR15 CR16 CR17 CRl6 CR19 CR20 CR21 CR22 CR23 CR24 CR25

MPI

X,Y

A.3

B.3

n.2

8.3 A.3

8.1

5.1

8.2

B.

I

B,2

u.2

R,l

8.1

F,,%

A,2

A

.2

A.l A.2

A.3 A.3

A.l

8.1

A.1 A.2

8.1 A,2 A.2

8.1

R1

A.2

8.1

8,I

8.1 A.2 A.2 A.2 A.l A,I

A.1

8.1

A20

Component Coordinates

COMP

01

02

03

04

05

06

07

OB

09 010 01 1 01 2 01 3 014 015 Q16 019

020

a21 022 023 024 026 027

R1 R2 R3 R4

R5 R6

R7

RB

R9 R10

RI R12 R13 R14 R15 R17

R18

R19 R20 R21

X,Y

A.1 A,

I

A.2

8.1

B.1

8.1

8.1 B.1

8.1

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 A.3 A.3

A.1 A.1 A.1 A.l A.l A.3

5.1

8.1 A.3 A.3

1

A,

1

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

8.1

A.

1

A.1

COMF

R22 R23 R24 R25

R26

R27

R28

R29

R30 R31 R32 R33

R34

R35 H36 R37 R38 R39 R40 R41 H42 R43 R44

R45

R46

R47

R46 R49 R50 R51 R52 R53

R56 n57 R58

RW

R60

lR6

I

R62

R63

RW

R65

R66 R67 R66

(1

of

X,Y

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

A.l A.2 A.2

8.2

8.1

8.1 A.l

8.1

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

8.1 A.2

8.1

B.1

8.1 A.2

A.2 A,2

8,1

8.1 A.2 A.2

8.1

B.1

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

e12

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

A,2

2)

-

(2314A

COMl

R69 R70 R71 R72

R73 R74 R75 R76 R77

R78

R79 R83 R84

U1 U2 U3 U4

U5

U6

UlO U12 U13 U14

VRl VR2 VFl3 VR4 VR5

TO

-

X,Y

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

A.2

A,l A,2

8.2

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

5.2

8.2 A.2 A.2

A,l

A.l

A.1

A.2

2622A)

-

COMF

-

Model

89018

r

A

A20

I

Component Locator

B

-

-L-

I

LO

SEE

REVERSE

SIDE

CONTROL

DIGITAL

SERIAL

I1

OF

2)

CIRCUITS

PERFIX:

2627A

AND ABOVE

8G-44

ASSEMBLY

(08901

I---

-

60229

140V

I

tl5V

I

-15V

18

moH

YMFIER

t5V

1

P/

XA21

I

1

I

-

I

-

I

1

I

'

HF VCO TUNE

$:pl

Iv

7

VOLTAGE REFERENCE

t40V CHECK OIVIOER

!8?.

1

/

21

FROM

.-\

+s"

TRACK LOOP AMPLIFIER

Q

12.1k

R84

7

I

FROM

MODE LATCH

Z1

E3

I

DIGITAL-TO-ANALOG CONVERTERS

TUNE +15V

.-Oi.-lid2IHl

n

w

NC i6V

I

I3

vcc

-15V

21

FROM CONVERTER

PROGRAWER

'8

,BIT

,BIT 9 IH)

.BIT

,BIT

BIT

..R31

::

9090

I

\

a

10

I1

12

13

I1

(HI

lHl10

IH)

(HI

12

I1

9 8

T

6

7

Is

32

-

YV

111.

I

13

vcc

UIO

DCA

Y<)

COUP VEE GND

I

CS

Cl2

0.01"

I

4-

-

CI

0.01"

UOV CHECK

*ov

,

DAC-TO-LF-VCXO

7

-16V

I

r-

I

CRO

CRI

I

O?E-IO:HF..-'

-

IC"

s-

on,,*"

D

.

-

LF VCYO TUNE AMPLIFIER

(./3)

6190

I

-1sv

9

PImDFLlT-T".

VOLiiGf'k%NViRTER7

+4pv +4OV

020

-15V R58

R5

IOk

21.5L

I

OAC CONTROL AMPLIFIER

a

-LOOP AUPLIFIER

OAC-TO-VCO

\I

-

*ov

R64

IO0

R65

40k

GROM

VCO SWEEP LOOP FILTER PROGRAMMER

e

I

-NARROW BAND *=Oi.=FidIlH1

DAC-TO-VCO

CLOOP SWITCH7

(NOTE 2) (NOTE

AN0

IL)

PI

I

LF VCYO TUNE FILTER

Q

...

RTQ

IOL

\

,-

C18

+

IO"

+[igg:

CI8V RT1

SWEEP

UP

619

CURRENT SOURCE

3@2

4

2)

016

2

HF VCO TYNE INP

I

-

+16V

\

.F VCXO lUNE

rp3

'0

100

II

&-

I

TO LF

I

vcxo

I I I

I

11

II

I I I

I

I I

I1

LF VCXO TUNE-

>I

I;

31rp

I

I1

2-

Q

19

TO

vcxo

R

TO SAMLER

I

LF

19

18

I I

;

I

;;)LTMETER

I.

SEE TABLE NOTES

2.

DIAGRAM USE HEATSINK UOTES. WEN SOLDERING

I20UI3.14.

BA-4

SCHEMATIC

a

CR2

t

I

CR26.

I

I1

OEYOOULATOR

FROM

AM

DEUOOULATOR

I

i

I

6TOP SWEEPILI

I

I I I I

I I

L

*.IV

RI

42.2t

-7.6V

1

t5.IV

-7.W

-16V

/

4

FROM TUNE MODE LATCH

@:%

I

-.,e

I

CR6

I

TRACK LOOP SWITCH

IOOX

7

aio

SWEEP

A

v

DOWN

CURREIT

+IS"

V

SOURCE

3'60

8

CR

9

*,6"

+16V R62

\

4.6

(D

u3~

016

FROM SWEEP CR23 PROGRAMMER

RT

1000

I

Y

P2

CR24

-16V

01

II

I1

11

I1

I1 I1

INTEGRATED CIRCUIT

VOLTAGE AND

GROUND CONNECTIONS

u2

U3.6

A20U13

TOP

I4

v1h

.

*.lV d.lV

VI

*v

Q,

-

16

-

T

-8

-

I4

-7

ss20

8G-45

1

A

Service

AZO

X,Y

8.2

8.3

A,3

8.2

Component

COMP

I

B

I

__

COMf

-

c19

c2

1

c22 C23

Coordinates

(2

of

2)

-

(2627A

AND

X,Y

ABOVE)

COMP

Model

89018

CRl'

1

TRK

OFS

ii

T

7

-

2

CR

MPl

a18

a28

Rlfi

R75 R76 R77 R78

R

u3 U6

u7

U8 UQ

u11

U15

U16

U17 U18 u19

u20

u21

82

A.3

1

A,3

8,1

A,3 A.3

8.2

A.3 A.3 A.3

A.3

8.2

B,2

8.2

8,3

8.2

8,2

8.2

-

3

A20

I

A

I

Component

Locator

B

I

A20

LO CONTROL

ANALOG CIRCUITS

(1

OF

2)

-

66-46

/O

A28

OTHERBOARD

SSEMBLY

18901-60229)

IO

7

16

14

12

15

13 11 9

4-

/O

AZO

LO

CONTROL

RF

__

--1

I

11

21 42

39

40

41

17

I8

I9

20

TOJFROM

RF DETECTOR

II

I

29

OVERPOWER

'i.

ILI

DATA BUNDLE

7

t5V

831HI

.2lHl

ASSEMBLY

_-

SELECT DECODERS

5

DEMUX

26

3

--

.

(2

OF

__

e=Oiai4lL

a=O;r=7ILi

b

2)

(08901-60262)

20

__

f4

.=o:s=PlLI

/

'4

>

.=Oia=AILi

,

'4

>

4

I

Y

!

,

I4

,

I,

__

I1

dlIH1

~ZIHI

d3lHl

5

dI(H1

I

d2lHl

I

dJ(H1

,

'

__

-

01

FF

-k

602FF

-2

02

FF

-

01

FF

01

FF

-

02

FF

02

FF

-*

'

D2

FF

,

LF VCYO TUNE

VOLTAGE

VCO WEEP PROGRAMMER7

+JV

FILTER

NC

15

14

NC

.I1

NC

*

NC

I5

NC

&

ID

NC

&

ID

NC

NC BIT 7 (HI,

,,~

,..

;8

NC

,

AND

__

BIT 8 (HI,

BIT 9 (HI,

BIT

ID

(HI,

BIT I I

(HI,

BIT

4

(HI,

BIT

4

(HI,

BIT 6 IHI,

BIT

6

(HI,

BIT

6

(HI,

--

I

'4

m

I

TO DIGITAL-

I

TO DIGITAL-

/8

TO-ANALOG

/8

TO-ANALOG CONVERTERS

CONVERTERS LSB'S

LSB'S

I

,

'4

--

20

_-

.=O:.=OlLi

.=o:s=51L!

/

+2w

__

m

U6D

__

CONTROL 1 ATCHFS

7j4j,-

~ ~~

7

~7

c2

Ul1

DZ

02FF

RF AND

.

-,

IF

FILTERS

2.15M

__

NC

s-Ois=lidllHi

NC

.=Oi.=lid2lHl

I/

e-O.r-l.d2IL)

~=O;I-I;~IH)

PI6

a

70

NOTES

__

LOOP TO TRACK AMPLIFIER

T

7

CRlO

20

__

TO

TUNE MODE

SWITCHES

--1

R76

I

000

CLOSE

.

LOOP (Hi

455 IHz

BPF

SELECT (HI

OVERPOWER

PqOTECT

STA-LS

I.

Y-7

TO

LO

DIVIDER

I1

IO

9

8

I

I I

I

I I

I

1

,

31

I

I I

7

I

I I

43

I

26

6

28

5

27

I

I_

I

TO

S

AMPLER

TO INPUT

MIXER

-5

TD

DETECTOR

-4

AMPL.ATTEN

INPUT

17

I I

I

I I

ia

I

RF

I

4i

SEE TABLE 8A-4 SCHEMATIC DIAGRAM NOTES.

INTEGRATED CIRCUIT VOLTAGE

AND

REFERENCE

DIGITAL

GROUND

CONNECTIONS

+I5

-

I3

r

I

ILI

35

11;

,I

TO

HF VCO

18

CRI

-

AMP

-

I

STATUS

ss2

1

0G-47

Service

A20 Component Coordinates (2

of

2) - (2314A

TO

2622A)

Model

8901B

-

I

n

I

8.1

A2

8

.2

A,2

A.2

COMP

-

TRK

1 1

OFS

FLTR

-15V

I

UP1

I

-

2

-

2

A.2

62

A.2

8.2

A,2 A.2 A.3

8.2

A.2 A.2

8,2

8.2

A.2 A.2

A.2

8.2

8.3

-

t

t4OV

3 3

\

NhE:

05.

20.

22.

23,

26.27

ARE

MOUNTED

ON

5V

HEATSINKS

-

A20

I

~~~

A

I

Component

Locator

B

1

A20

LO CONTROL

ANALOG

CIRCUITS

(1

OF

2)

ss2

1

86-40

/____I_

dolnl

DIGITAL-TO-ANALOG

CONVERTER PROORAWERS

ut9

16

I,

Q

BIT

12

8,

,HI$

TO DIGIIALTO-ANALOG

CONVERTERS

USB'S

20

NO%;.

NOTES

4

XHEWTIC

'/O

A26

--

/

CONTROL LATCHES

7

LO BAND

-\

I

I.

SEE TAOLE

DIAORUI

7

SELECT DECODERS

I

-

TUNE UODE

"-

-

I

t

I I

I

31

1

I

TO DIGITAL-

/;

(HI,

TO-ANALOG CONVERTER8

Lsn's

BIT

4

6

,201

dorw

I

'4

10

I

J3

10

7

GIHI

..OIL1

PI0

XA20

L I

I

>

'4

I

021H)

/

-k

FF

I

Nc

20

T

43

I I

1

TO

INPUT

UIXLR

SA

u7,waa

W.23

W.II.18

ru

CUT VOLTAOE

*v

-

6

v2

-

12

*v

-

I4

92

-

7

*V

-

I6

14

12

I5

I3

11

0

ANALOG

GROUND

30

40

41

IT

10

IO

20

29

I

I I

I

II

I1

II

I

13

I

dOIHI

OVERPOWER

I

I--

SERIAL PREFIX:

/r:

20lu)

DATA BUNDLE

(Ll

23I.A

-

TO

UT-6

&"

2622A

-.

__

u15-18

-- --

/

/4

'4

I

?

4

"

VOLTAGE LF VCXO FILTER TUNE AND

I4

dOWi

dI(HI

4H

(3

H

a

VCO SWEEP PROGRAYUER

01

FF

02

FF

02

FF

'-\

NC

--

._

NARROl

..Oil

/

,,

I

BAND

I-OI.*FI~~IHI

ILI

~,

__

I

.=0;.=6(LI

TO SWEEP

SOURCES

TO LF VCXO IUNE VOLTAOE FILTER SWITCH

20

R86

2.1w

CR26 OVERPOWER

1

-

AUP STATUS

-

cnzr

r-+

NARROW BAND

ILI

I

28

6

20

5

27

I

I I)

ILI

>

36

I

34

I

33

>

I

+NC

I/

TO

HF

-

'j

TO

VCO

Y

PI0

18

I

ss2

1

8Q-49

Service

All

Component

I

6NO

1

I

GATE

-

A

SEL OUT

10

I

2

8

MHZ

E

VM

GATE 10

I

EXT

WHT

IN

J6

I

UP1

I

30MP

_.

c2 c3

c5

C8

c9

C14 C15 C17

C18

c20

C22 C26 C28 c29 C30

CR1

CR2

CR3

CR4 CR5

X,V

8.3

8,1

8.1

A.2

8.2

8.1

A.1 A.2

8.2

8.1

8.2

8.1

B

B,2

B,l

8.1

0.1

8.2

-

2

COMP

R26

R27

R30 R31

R32

R36

TPl TP4 TP5

U2

u3

u4

U8

u9

u10

u20

u21

-

X,Y

-

8.2 A.2

8.2

8.1

8.2

A,2

A.l A.1

8.1

A.2

8.2

A.2

8,2

8.2

A.3

0.1

Coordinates

(1

of

2)

Model

89016

d51

i5V

IF11

2

J4

J5

J6

12

MP1

a3

a4

-

I

+5V

IF21

3

I

+5v

R4

R5

RE

R9

R10

R11 R12

r18

R20

R25

8.1

A.l

8.1

A.2

8.1

8.2

A.2

8.2

8.1

6.2

8.1

B,2

A,2

A.2 A,2

8.1

8.2

A1

1

I

A

I

Component

Locator

B

I

LO

A20

CONTROL

DIGITAL

(2

OF

2)

CIRCUITS

-

BG-50

L

s-De

ZZSS

NDmDl

01

I

NId

I II

Y3013

Ed1

ZHW

oao

I

9sn

Z

1IIVN3H1S

V~ION

b-VQ

S310N

nvnovra

31811

335

'I

t5V

IF11

Service

All

I

GNO

GATE

A

SEL OUT

TB

I

2

0

HHZ

E

vu

GATE

EX1

io

unz

IN

J6

I

UP1

-

30MI

-

c1 c4 C6 c7

c10

c11

c12 C13

C16

c19 c21 C23

c24 C25 c27

CR6

J1

J2

J3

ai

a2

a5

X,Y

A.2

A,2 A.2 A,2

8.2

A2

8.2 A.2

8.2

A.3 A.2 A.2

A.1 A2 A,1

8.2

A.l A,I A.1

4.2

4,2

5.2

COMl

R35 R37 R38 R39

TP2 TP3 TP6 TP7

u1

u4 u5

U6

u7

u11

u12 U13 U14

U15 U16 U17 U16 u19

u20

Component Coordinates

X,Y

A.2

8.2

8.3

A.l A.1

8.1 8,2

A.1

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

8.2

8.2 A.3 A.3

COMl

(2

of

2)

Model

89018

I'

t5V

IF21

A1

1

t5v

R1

R2

R3 R7 R13 R14

R15

R16

R17

R19 R21 R21 R22 R23 R24

R26

R29 R33 R34

-

4.2

3.3

4.1

4,l

4.1

1.1

1.1 1,l

1,2

1,1

1.

1 4,2 4,l

4,l

4,2

1.2

Y1

8.1

I

A

I

B

I

---

Component

Locator

AI~

\

COUNTER

TlMF

RASF

(1

CIRCIIITS

OF

2)

a

(-

8G-52

Model 8901B

Service

~~

All

serial

~

prefixes

~~

On

the All schematic:

-

R16

-

CHANGES

In

the upper left portion

U14A, change the value

of

R16

of

the schematic, above

to

1000

ohms.

and

to

the right

of

reu.IOOCT88

SS23

8G-52.1

FROM

IWIO

COUITERI DISTORTION

'Io

I

CALIBRATED

FY

2

PI0

A27 DIGITAL MOTHERBOARD ASSWLY

(08901-60140)

r---1

STOP

'

14

>

COUNT

24

DECOOEO ENABLE

BUFFERED SELECT

(HI

WIQ

I

XAlI

6

I<

20

/I

I

42

21

39

40 41

I I

I

I7

<

CALIBRATE0 FY'2

STOP COUNTIHI

)-

1.

i

IOK

I

rt-7

\

/I

,

r

DIVIDE-BY-TWO

&

a

22

TP6 YUIAUDIO GATE

I

-SA

INITIALIZATION

a

8-1

1

6.26

1d2CLI

KHz NOMINAL

GATE CONTROL

I

-

1-

B

,

INPUT SELECTOR-

I

Ir

LATC', (.=31

Ut3

'7

INPUT SELECTOR CONTROL BUNDLE

I

STAGE

7

ECL-TO-TTL LEVEL

6v(F11

=-I

TRANSLATOR

26.

I

7

a

,-'

DIVIDE-BY-FOUR

I

-,

.=3:.=T(Ll

rSTAGE

ED

2

7

STAGE

4

r

STAGE

3

7

COUKTER OUTPUT

a

PI0

A27

I.

SEE TABLE EA-4

2.

THIS

LINE ALWAYS CONNECTED BUT SIBNAL

PRCSENT ONLY

NOTES

SCHEUATIC

WITH

OPTION

DIAGRAM WTES.

002.

I

TP2 GATE

I

COUNT LOGIC TRANSFER

2j+-pLL

f

,

0

'7

~

I

.=3i.=OlL1

'6

,

'I

..3;.-

r

I,

'2

7

'I

7

OVEN

NARY

I

REAOBACK CIRCUIT

a5

TIME

<1'4)

7

OVEN WARY STATUS

CR6

P-

TI

I

BASE

I

(HI

I

0

I

I1

.=3:.-6lLI

RAW

6.26

TWE

GATE

KH2

BASE

(HI

I

AI

IR3T

~6

I1

I

1

DATA

I

TOGGLE

LINE

TO

CONTROLLER

24

I

1

DIGITAL INT€

VOLTAGE

CONNI

u4-6

I1

I2

14-16,IB-$0

UT.

IT

I

U13

t6v

-

I4

+w-

!-I

0

-

12

SS23

0G-53

I

1

-

2

n

I

D

I

-

I

U

50

3 3

o

I

o

o o

TO

X.4131,

o

o o

o

on0

22

o

o o o o o o

1

TOX.4138

--I

o

o o

09

15

-

2

-

Service

A13

Component

COMP

-

ET1

c1 C2 C3 C4 c5

1

C6 c7 C8 c9 CiO Cii c12 C13 C14 ci5 C16 C17 C18 619

620 c21

CR1

c22

CR2 CR3

CR4 CR5 CR7 CR9

DSi

OS2

DS3 DS4

Li

MP1

MP2

01

02

6.1

8.2 A.1

A.2

8.2 A2

8.2 A,l A2 A,2 A.2

8.2

8.1

8.2

8,2

I

A.2 A'i B,l

8.2

8.1

8.2

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

8,2

A.l

8.1

8.2

03 06

R1

R2

R3 R4

R5

RG

R7 R8 RQ R10 R11 R12 R13

R14

R'15

1316 R17

R18

R19

R20

R21 R22

R23 R24

R25

R26

R27 R28 R29 R30

u1 u2 u3 u4

us

u7

U8

u9 u10

Uli

vi2

X,Y

B,2

A,2

8,2

8.2

A,3

A,2 A,2

8,2

8.2 A,2

8.1

8.2

B,i

B,1

8,2 B,l

B,l

8,2 A2

8.1

8.2

B.2

8.2

A.1

8.1

A,l

8.2

A.1 A.2

8.2 A.2

COMP

U13

VR

w1 w2

Coordinates

I

Model

89018

1

A

A13

I

Component Locator

B

1

A

COUNTER COUNTER

C

(2

I

ACU

OF I TS

2)

'L

ss23

06-54

Model

8901B

Service

CHANGES

All

serial prefixes

2531A

~~ ~

2550A

2635A

and above

On the

0

REGULATOR

On the

C19,

and

On

0

F-

value

On the

C19, C20,

On

A13

-

On the lower left

A13

C20

to

the

A13

In

the center

of

R11 to

A13

the

A1

Schematic:

hand

side

of

the schematic, locate

and

change pin

~~

1

to

3,

Schematic:

-

Under CENTRAL PROCESSING

47

pF.

Schematic:

of

the schematic, under

51.1

k.

Component Coordinates:

L1

-

Delete C19, C20 and L1.

3

Component Locator:

and

3

to pin

UNIT,

POWER-ON

U6

under + 12V

1.

change

the value

RESET, change the

of

C19

2635A

2636A

and above

0

C19, C20,

On the

0

C19, C20,

L1.

On

the

0

A27

08902-60102.

0

Buffered Select Bullet

service sheets 23 and 28. Add service sheet 33.

0

Buffered Data Bullet

service sheets 23 and 28. Add service sheets 33 and 34.

Decoded Enable Bullet

service sheet 23. Add service sheet 33.

L1

-

A1

3

L1

-

A27

-

Change the

Delete C19, C20 and L1.

Schematic:

Under CENTRAL PROCESSING

Schematic:

part

number

’S”

“T”

“R”

of

A27

DIGITAL

-

On the right side, bullet

-

On the right side, bullet “T” directs

-

On the right side, bullet “R” directs

MOTHERBOARD

UNIT,

“S”

delete C19, C20

to

directs you to

you

to

you

to

and

rev.

15JUN90

SS24

8G-54.1

Service

Model 8901B

CHANGES

2804A and

Errata

above

On the A13 Component Locator:

0

08901-60196

0

DS1 - DS4

DS3,

DS4.

-

Use the

-

Reference designators should read top-to-bottom

new

component locator

On the AI 3 Schematic:

0

08901-601 96

0

A13

-

In

to

read "2804A and above".

-

Use the

the lower lefi hand corner of the schematic, change the serial prefix

new

schematic foldout on page 8G-54.5.

On the AI 3 Schematic:

0

m-

Under NONVOLATILE MEMORY

to

0.22

pF.

0

c17

-

Under

POWER-ON

RESET,

change the value

On the A13 Component Locator:

0

-

U6

-

On page 86-54, find U6 and move the polarity symbol

of

side

locator

the component. Make the same change to

on

page 8G-54.3.

on

page 86-54.3.

SUPPLY,

U6

DS1,

DS2,

change the value

of

C17

to

4.7

pF.

to

the opposite

on the component

of

C21

86;-54.2

rev.

26JUN91

SS24

Model

8901B

8

n

@

"r

Service

1

8

1

8

C

0 0 0 0 0 0 0

0

0 0

-8

-

El

8

m

3

r

1

A

I3

Component

Locator

(28O4A

and

above)

.'3S

SG-

24

5

4.3

Q

c

tZl

E

t

9

S+

ZI+

I

9

Bt

S+

I

ZI+

I

611

an

91'5

I

'E

'e',!

I

ma

av3n

snivis

lr

IlIEP

IlIZP

llI1P

I

'i

IHIZP

111EP

3N11

VlVO

c

!112P

P

-

IS31

-

I

II

F!

WOLld-3

PC

106-10680

IHlOv3n nd3

I

sna

10UN03

L

33V4831NI

AUOW3W

I-9ldl

3IlVlS

nd3

d

I

i

I

L--

COG709-

10680)

1

JTHEREOARD

ASSEMBLY

(0890 I -60

I--

140)

CONTROL

--1

I

-

I

'5

NOTES

I.

SEE TABLE8A-4 SCHEMATIC

I I

f;d3[

I

'8

-

TFFFI

16383

/

'8

I6

7

ROY

3

I

0

180000-BFFF)

7

I

RAY WRITE

IL)

,

'

16

CPU EXTERNAL

7

REGISTER

7

CPU READ(H1

-

.

CPU

READ(H1

CPU READIH)

28

INSTRUYENT BUS

-

I

\

DIAGRAM NOTES.

2.

PARAGRAPH BATTERYI

DISPOSAL PROCEDURES.

A13011

8-I

FOR SEE RECOMMENDED

IS

A LITHIUM

I

12

UT

RAM WRIT1

(LI

02c

..

ILI

+

RT

3160

-vh

/

'6

*v

BAlT

7

PULL-UP

I

-

,-

I

<-0.02

TO

+0.02 Vdc)

(+%8

TDC6JVdCh

Pom-on

4V RESET

I

+12v

VR

I

6.2V

RESET

2000

-

+12V AND

OROP OETECTION

+6V

POWER SUPPLY

lEQRITED

,TAE

WD

TCTIW

rw

MYERI

i4V

EAT1

I

110

-\

7

RAY DISABLE

7

NDWOLATILE UEUk SUPPLY

TP5

ITILI

I/

U2D

OS34 R23F

4

7

+6\

'T6-i

+6\

-ENABLE DECODER

DATA

TDQQLE DISABLE

LIK

d3lLl

TV

6

BATTERY GROUND

..OIL1

I

.

>

13,

I~

..

\I

UNBUFFERED

~ rEis

FRW CWNTEI

AND REWTE

4

INTERFACE

..I(LI

..2lL1

DECODED ENABLE

I

TO

I

CDUNTER

DECODED

23

9

M.

UI.

I3

IO

+6v

9-7

+6v

9

M.11

UT

?6v

0-8

4v

9

W

UO

A13R3

4 6 29

UI2

-

i

*I1V

4v

9-20

*12v

+6v

0

4v

9

-

I2

14

1.27

28

I4

le

n

I4

I

4D

4

3

24

20

I

14

-24

IO.

R

CPU

READ

+6v

'-t

,

'6

'8

ADDRESS

%PP

\

CPU READ

IL)

YASKED ROY

2)

A

'8

I

,?

MEMORY SELECT

DECODERS

-

-\

'8

t

-

&

+5Y

C16

.OI"

I

SS24

8Q-55

+6v

-4

3

f

I I

I,

I

U2-I4 UIO-28 UT-28 U4-28 c U4-28

Ic2

T;

.01"

1

x

C3

0.1"

1

-&

C4

0.1"

I

2

C6

0.1"

+I

x4.n

C8

c

1

-J

U5-16

CO

.DIU

U8-40 c U8-40 US-3 UO-3

1

CIO

*I

CII

1

x

.DIU

X2.2"

x

C12

.DIU

T;

C13

2.2"

c

U12-20 t U11-16 U13-I4

I

C14

1

x

.01"

CIS

.DIU

I

TP1

J-

TP2

TP4 PMR

I

1,

TPS

lP8

01

MI

BLACK

A

uu

MIRE

OS17

I

w

Servl

a

I

C

I

D

I

/------

H

I

U

._

I

ce

>OMP

c1 c2 C3

c4

c5 C8 c7 C8 c9 C10 C11 c12 C13 C14 C15 C16 C17 C16 C19

J1

J2

MP1 MP2 MP3 MP4 MP5 MP6 MP7 MP8 MP9 MPIO MP11 MP12 MP13 MP14 MP15 MP16 MP17 MPl6 MP19 MP20 MP21 MP22 MP23 MP24

I

A.2 D.l A,2

8.2

c.2 c.2 c,2

D.2

D.1

c.2

8,2

8.2

8,2

C.2

8.1

A,I D.1

I

A.2

I

A’1

A.3 A.1 A.3

8.3

8,2

D,l A,2 A.2

8.3

8,2

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

A,2

8.3

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

X,V

11

COMP

MP25 MP26 MP27 MP28 MP29 MP30 MP31 MP32 MP33 MP34 MP35

MP36 MP37 MP38 MP39 MP40 MP41 MP42 MP43

P44

M MP45 MP46

R1 R2 R3 R4 R5

R6

R7

R6

R9

R10

R11

61 52 63

610 s11 512

A1

Component Coordinates

-

x,v

-

8.3

8.2

0.2

D,2

0,3

D.3 A.2 A2

c.3 C.2

0.2 D.2 D.3 D.3 A2 A.2 c.3 C.2 D.2 D.2 D.3 D,3

D.1

0.2 D.1 D.1

D.l

0.1 D.1 D.l D.l D.1 D.1

A.3 A.l A.3

8.3

8.2

D.1 A.2 A.2

8.3

8.2 c.2 C.2

-

COMP

-

613 614 615 616 617 616 619 620 621

622

623 624 625 626 627 628 629 S30 631 632 633

634

635 636 637 638 639 640 641 642 643 s44 645 646

TP1

TP2

TP3

T

P4 TP5 U13 U14 u19 u20 u21

w1

-

c.3 c.3 A.2 A2

8.3

8.2

C.2 c,2 c.3 c.3 A.2 A.2

8.3

8.2

D,2 D.2 D.3 D,3 A.2 A.2 c.3 C.2 D.2 D.2 D.3

D.3 A.2 A.2 c.3 c.2

D.2 D.2

D.3 D.3

A.3 A.3 A.3 A.3 A,3 D.1 D.1

D.2

A.3

x,v

(1

of

3)

Model

89018

A1

I

A

I

u

I

Component

Locator

L.

I

SEE

REVERSE

SIDE

Y

A

13

CONTROLLER

SS2r

-

8G-56

P/O

A27

MOTHERBOARD ASSY

‘0

>WER DTHERBOARD ASSY

8901-60142)

-

31

DIGITAL

CONTROLLER

A26

SUPPLY

__

FRW

YI

(OPTION 00201LY)

I

PI0

P/O

AI KEYBOARD AND

I--

DECODED ENABLE

--

DISPLAY ASSEMBLY

__

7

(I

KEY

OF?)

ROW

SCANNER-

(08901-6_0143)

Gm

--

/

+

5v

I

---__

RIC

4700

<,

RIH

ma

52

>=

--

FRONT PANEL KEYS

__

--

-_

--

\

__

/

__

-_

KEYSTROKE DETECTOR

0

__

--1

\

NOTES

I.

SEE TABLE DIAGRAU NOTES.

2.

,-“PER

A

VnEh

W

3.

I

I I

I

‘0

A27

10

I14

I3

I

TO

CONTROLLER

PI0

AUPLIFIERS COLLECTOR

4.

OPTlOh

~IG”

YI.COhhECTS

A

84-4

A

lP4

S3

TO

1.Rh

IS

DISCOhhEClEO.

U134.B

OUTPUTS.

DO2

OVFh

SIABI-ITI

CO-hlER

SCHEMATIC

TD

A.lP3

Oh

lhSlR>UEhl

HAVE OPEN-

WARY

ThRO.Gn

cRvsii-

ASSEYB-V

llln

.IN€ FROU

A26

OSCI.-A~OR.

AND

.

AI

TO

I

68.11

Il0

4

I

TP5 (NOTE

21

30

-

26,27

I

u21

t6Y

I

I I

I

,2

Bo

3

dOIL1

PI0

J2

I

,

‘1

I

I I I

I I

I

II

bI

UNBUFFERE

DATA

I

1

DIGITAL INTEGRATED CIRCUIT

VOLTAGE

REFEREhCE

u

19

Ul420.21

AH1

CONNECTIONS

GROUND

t6V

+-e

l5V

6-7

AIR1

-16

-14

ss25

8Q-57

Ser

v

I

ce

AI

I

A

I

B

I

C

I

D

I

-

COMF

-

CRI CR2 CR3 CR4

-

X,Y

-

A.2 A.2

A,2

A.2

Component

Coordinates

(2

of

3)

Model

89018

tnv-

awo-

4

I

TPS

TPO

ON

WI

BLACK

I

wine

w

1

H

J1

J2

R12

R13

R14

R15 R16 R17 R18 A19

R20

R21

u3 u4 u5 U6

u7

U6

u9 u10

u11

u12 U15 U16

U22

u23

u24

u25

U26

U27

U26 u29 U30 U36 U36

w1

A.2

A,I

c.2

8.2

c.2

8.2

C.2 8,2

8.2

B,2

8,2

8.1

B,1

B,l B,l

8.1

B,l

8.1 c.1

c.1 c.1 A.2

8.2

82

8.2

8,2

8.2

:,2 :,2

:,2

8.2

A.3

-

I

A

I

E

Component

I

Locator

C

I

*'

KEYBOARD KEYBOARD AND DISPLAY(1

D

CIRCUITS

OF

I

3)

SS2f

-

8G-58

UNBUFFERCD

I

DATA FRDU KEY

CDLUH

¶CANNER

i

'

"9

NOTES

I.

REFER

/-,

DATA LINE

BUFFERS

TO TABLE

DIAGRW

NOTES.

MA-4

FOR

SCMWITIC

e&

..8

-0

-

J

25

t5V

I

-SELECT DECER

7

i

DOT

-

I

'4

I

dO(L1

I3

ID

3

4

6

R21C

R21D

R21E

SS26

8Q-59

I

BUFFEREO SELECT

ea

KEY LATCHES AN0 INDICATORS

dllL)

/d2lL) 2

'd3lL) S=3(L1

I4r

,

NOTES

V

I

3

@

LRANGE

@I

AUDIO

HOLD

IBLUEI

IHPUT

I

1

1.

SEE TABLE

OIAGRW

BPI-

NOTES

4

SCHEWTIC

I

UNBUFFEREO

DATA

25

FRW COLW SCANNER

KEY

50.7;;;

1

TI

I

dOO(L1

c

I3

0

o

[DISABLE

0

OB

0

I

dB

0

I

AUTO

EX1

TUNING

ERROR

ATTEN

I

\

Ih

I

7

d0lL)

I3

10lL)

I3

NC

-

I

I!

ss27

8Q-6

1

I

UP1

0

7-q

J1

..........

Service

A

ON0 TPl

I

ATN

TP2

ANL

t12V

lP4 lP5

TP3

B

t5V

IN1

TP6

ATT

TP7

ATL

TPB

ROY

TP9

I

/TUP1

1rm

c1

C2 c3 c4 c5 C6 c7 C8 c9 c10 c11 c12 C13 C14 C15 C16 C17 C18

CRl

J1

MP1 MP2

8.3

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

A.2 A2 A.l

8.2

8,3

A2

A.l

A.1

8.1

A14

Component

X,Y

8.1

A,l A,l

8.1

A.2

A.2 A.2

8.2

A2

A,2

8.2

8.2 8,2

8.3

Coordinates

COMP

Model

89018

I I

'10

1

II

IIII

II II

II II II II II II II II

0

II

22

On0

1

II

0011

o

II

II I II

II II

15

17

R1

R2

R3

R4

R5 R6

R7

R8

R9

51

TPl TP2 TP3 T

P4

TP5

TP6 TP7

8.3

A.2

8.1

8.2

A.2

8,2

A.2

8,1

8.1

I

J

A14

I

A

I

E

I

Component Locators

A3

1

A

'

SEE REVERSE SIDE

KEYBOARD AND

ANNUC

I

ATOR

DISPLAY

C

I

RCU

I

TS

(3

OF

31

SS27

80-62

Service

3019A

and

above

On

0

R5

the

A1

-

Under

CHANGES

4

Schematic:

INTERFACE

CONTROL,

change the

value

of

R5

to

2150

Model

Q.

8901B

i

SS28

86-62.1

dI

AFC

(HI

(Ll

LISTEN

l;;n

IO

'IEB

NOTES

I.

SEE TABLE

OIAGRW

2.

CHASSIS OROUNO BY YCHWICAL CONTACT THRU SCREWS HOLDING P.C.

TO

A31

REMITE

ASSnneLY

(

0890

I

0101

-60242)

(Ll

I

<

I

r---

ATL

IH:

8

ATL

(Ll

A

FRAME.

8A.4

NOTES.

FOR SCHEUATIC

IS

ACHIEVED

BOAR0

I

\I

maa

LINES

CDUTllOLLU

24

r

PI0 INSTRWENT

~

DLCWED PI0

ENABLL

CMITROLLER

24

BUFFEREO SCLECT

CONTROLLER

24

BUf f ERLO

DATA

FROM

COYTROLLCR

24

FROM

PRW

CPU

AIO

AII

AIP

A13

REA0

BUS

,.,

,3

a0

*I

*2

40

43

Wl<

in)

in) in)

(Hl

(HI

7

MI41

lH,

IHl IHl

IHl

(HI

in)

!I

I

:I

I

I1

I

I1

I

!I I

30

31

I3&NC

NC

1

-

SELECT DECODER

mv

,

'3

c3

c4

cs

\

-

CT CO

FC EN

1

mv

C

(Ll

(HI

-

IFC

r

RMTE ENABLE

FLIP-FLOP

RNL

-

SERIAL POLL

FLIP-FLOP

s

(L)

7

U3B

7

IHl

NC

I,

4

REN

In)

,,

II

I

SIC

I

8

'

,

I

,>

TREAD

ADDRESS

BACK-

I>

Ill

I

Ik

/

,I

'2

I

1-1

/

'4

,

AFC

'I

-1

-

WUH)WE

(Ll

LWIC

-

SDV

(HI

I

II

-1

TALK

(L)

\

,-

HP-IB

CONTRU.

LINE

INTERFACE

+6V

\

IIII

II

I

REFEREEKE

mv

u21A

a

I

LTN

iH)

TP2

IO

*V

RTR

6200

42

46

3

+

OAV

(L1

ATN

IL)

2

ATN

,

RTH

6200

d3

(Ll

'4

I

RTP

3000

.

REN

ATN

SRP

II

lL1

IL

CIO

CI3

CI6

C16

*V

CI4

,

40

41

d2

d3

(Ll (Ll (Ll

ILl

II

I

19

IT

1

I

>2

>3

>4

I

I;

I!

I

r

PI0 INSTRUKNT BUS

I

OATA

TO

CONTROLLER

I

;I

I

12

7

I

U14

13

!JA

I

::

ss20

80-63

-

Service

A51

Coiiiponent

I

1

A

I

TP2

TRAPEZOID TRAPEZOID TRIANGLE

FREO

OUT

SYYM

TPJ

OUT

E

HPi

I

N

7

-t5V

IF1

2

I\

-0IGITAl

2

3

-15V

IF1

-5V

IF1

-5V

IF)

-

:OMP

-

c1

c2 c3 c4 c5 C6

c7 C8 c9 c10 c11 c12 C13 C14 C15 C16 C17 C18 c19 c20 c21 c22 C23 C24 C25

CR1 CR2 CR3 CR4 CR5

CR6

CR7

CRB

J1

J2

L1 L2 L3 L4

L5

L6 L7

X,Y

A.3

8.3 A.3

8.2

8.2 A.2

8.2

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

8.2

8.1 A.l

8.2

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

8.2

A.l

8.1

A.3

6.3

8.3

8.3 A.2

4.2

A2

COMF

MP1

Ql

Q2

03

Q4

05

06

Q7

Q8

Q9 Q10

01

1 012 Q13

R1

R2

R3

R4

R5 R6

R7 R8 R9 R10 R11 R12 R13 R14 R15

R16

R17 R18 R19

R20

R21

R22

R23 R24

R26

R27

R28

R29

X,Y

8,1

A.1

A.1 A.2 A.2

A.1 A.l A.2 A.2 A2 A.2 A.l

8.2

8.1

8.2

6.1 A.2

8.1

8.3 A.2

8.1

8.

8.2

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

8.2

8.1

A.2 A,2 A.l 8,1 A.l A.2 A.2 A.2

-

COMP

R30 1131 1332

R33 R34 R35

R36 1R37 R38 R39 R40 R41

1142

1143 f(44 R45 R46

TP1 TP2 TP3

UI u2 u3

I

u4 u5

U6

u7

U8

u9

VR1 VR2 VR3

VR4

VR5

VR6

Coordinates

X,Y

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

A.

B,l

A.l

8.1

A.2 A.

A.l

8.1 8,1

8.1

A.l A,1

8,1

A2 A.l

8.2

8.3

8.2

8.1

8.2

8.2 A.2 A,2

COMP

I

Model

89018

A5

1

I

A

I

Component

Locator

E

I

14

REMOTE INTERFACE

-

SS2E

8G-64

P/O

A25 AUDIO

MOTHERBOARD ASSEMBLY

(08902-60137)

PI0

XA5

.

I

A51

FM

r--

I-

I'

LI

CALIBRATOR ASSEMBLY

POWER SUPPLY DECOUPLING

__

-\

(08901-60013)

__

1-

-- --

FY SOURCE

TRIANGLE GENERATOR REFERENCE

10

kH2

-\

_-

__

..-

--

I.

--

\

,-

OSCILLATOR COLLECTOR SUPPLY

+

IWlF

J

--

0

__

-,

/

__

IUTPUT MPLIFIER

HSVIFI

<Jz)

--1

\

SEE TABLE84-4 SCHWATIC NOTES DIAGRAY NOTES.

2.

THE COUNTER BUFFER

COUNTER GROUND

IS

REFERENCED TO

THROUGH

THE

SHIELD

OF

THE

vis.

r

I I

I

--

-1OV REGULATOR

I I I I I

I

GND

/-

ANALOG

I

VOLTAGE REFERENCE

7

<-12.0

TO

-11.6

"I

-\

/

v4c>

a

TO

AY

CALIBRATOR

30

a

I

I1

I

CT

0.02"

97-

A

F

COUNTER

23

DESIGNATIONS REFERENCE

li8

u7

NWERS PIN

-IDV

MVLF)

q

0,

-

r

1'

I6

m

&-

AEIUI-4

TOP

VIEW

ss29

8G-65

-

2

-

3

Service

A50

I

*

1

ANALOG

ONO

&I

3

-lOV

IF)

TPl

GNU

-5V

A

IF1

SYMM

I

TP2

Xl LVL ‘A‘ LVL XlO LVL

-15iIFl

+;5v

IF1

MPl

+5V

UB-3

IF1

B

TP3

UB-7

tl.4V

I

N

7

--15V

IF1

.U10-8

0

IO

IT

A

L

GNO

.

-

>OMP

-

c1

c2

c3

c4

c5 C6 c7

C8

c9

c10

c11 c12

C13

C14 C15 C18 C17 C18 c19 c20 c22 C23 c24 C25 C26 c27 C26 c29

C30 C31 C32

c33

C34 c35 C36 c37 C36 c39 C40

C41

c42

c43

c44

c45 C46

X,Y

8.3 A.3

8.3 A.3 A.1 H.2 A.2 A.2 A,3 A.l A.2 A.2

A.2

A.l A.2

A.2

A.l A.l

A.2

A.2 A.2

8.1

8.2

8.1

8.2

E,2

4.2

3.1

3.2

4.2 32

4.2

42

3.2

4.2

4.2 3,2 4,2

4.2

COMF

c47 C48 c49 C50 C51 c52 c53 c54

CRl CR2 CR3 CR4

CR5 CR6 CR7 CR8 CR9 CRll CRl CR

J1

J2

L1

L2

L3

L4

L5

L6 L7

L8

Ql Q2

Q3

Q4

Q5

Q6

Q7

08

Q9

QlO

X,Y

8.2

A2 A.2

8.2

8,2

A.3

A2

8.2

A.l A.2

8,

I

8,2

8.1

8.2

8.1

8.2

A.2 A.2

8.2

I:

8.2

A.l A.1

8.3

A.l

8.3

A.2 A.2

A.2

8.2

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

8.2 A.2 A2

A.2 A.2 A.2

Component Coordinates

COMl

Qll

Q12

Q13

Q14

Q15

QlG

01

7

01

8

01

9 Q20 021 Q22 Q23

R1

R2

R3

R4

R5

RE 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

-

A.2 A,2 A.2

B.2

8.2

8.2 A.3 A.3 A.3

8.3 B,3

8.3

A.3

8.2

8.2 A.3 A.3 A.3

R,2

8,3 A.l

A.1

A,2 A2 A.2

8,2 8,2

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

A.2

A,l A.l

x,y

8,2

8.2

-

COMP

__

n

R R

R35 R36 R37 R38

R

R40 R4 R42 R43 R44 R45 R46 R47 R48 R49

R50

R51

R52 R53

R54

R55

R58

R57

R58

R59

R60

R61

RE2

R63 R64 R65

R66

R67

R68

RE9 R70 R71 R72 R73

R74

R75 R76

32 33 34

39

X,V

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

8.2 A.2 A.2

A.1

8.2

I

A.2 A. A.2 A.2

8.1

A.2

8.2

8.1

8.2 A.3

8.1

8.2 A.2

8.1

B,l

8.1

8.2

8,2

8.

8.2

4.2 4,2

8.2

A2

3.2 3,1

3,2

3.1

4.2

8.2

COMF

R77 R78 R79

R80

R81 R

82

R

83

R

84

R

85 REG R

I

87 R88

R89

R80 R91 R92 R93 R94 R95 R96 R97

R98 R99

RlOO

RlOl

R102 R103 R104

R105

R106

I

R107 R108

R109

TPI TP2

TP3

u1 U2 u3 u4

us

U8 u7

X.Y

B,l

8,2 A,2

8,2

A,2

A,2 A.3 8,2 A,2 A,2

8,2

A,2

8,2

A,2

8.2

A,2

8,2 8,2

8.2

8,2

8.2

8.2 A,2 A,2 8,2

8.2

A.2 A2 A.2

A.1 A.1

61

A.2 A.2 62 42

A,2

A,2 A,2

COMP

U8 u9 u10

VR1 VR2 VR3

Model

-

x.y

-

8.2

8.3

8.2

8,2

89015

A50

I

A

I

Component Locator

B

I

A5

1

FM

CAL

I

BRATOA

-

8G-66

P/O

A25 AUDIO

MOTHERBOARD

ASSEMBLY

(08901-60137)

__

I-

I

LIMITER

+15V(FI

-

. . . . .

,-

. .

.

I

Ql

AMPLIFIER

A

-\

I

-16VlF)

/-

MODULATOR A

-\

R5

I

2610

SUMMING AMPLIFIER

+I5VlFl

056

-0.02"

R65

51

I

Q

MODULATOR

I

B

RlO8

-\

-7.3

+16VIFl

R60

2610

R68

61

10

R62

61.1

w.3

TO

U.8

I

1

>2>

TO

v4e

-6.6

-\

Vdc>

I

rg.0

+5.6

,-I

TO

vac

/

R74

348

F32

PI9

,

AMPLIFIERIDETECTOR

Q

'I

C35

B CURRENT SOURCE

,

I

7

,"I

I

XI Dc AMPLIFIER

+ITF'

C46

0.02"

X

10

DC AMPLIFIER

VR3

5.62V

J!I

-

RlO3

-16V(F1

R106

1000

--1

.

AM

CAL

C52

0.02"

I

'0

A25

0

-1s

-1

TO

VOLTMETER

I.

SEE

TABLEB1-4 SCHEMATIC DIAGRAM NOTES

2.

A50U6

IS SHOWN BELOW.

DISCHARGE

C 0 N T R

0

L

VOLTAGE

THRESHOLD

I I

TRIGGER

I

NOTES

________----------

FLIP FLOP

RESET

1

I

I I

I I I

I

OUTPUT

-6VlFl

-

-15VlFl-

-6VCFI - I4

-1OVlFl-

+W(Fl

-

8

I

7

6

INSTRUMENT FROM CONTROLLER

BUS

I

DIGITAL GROUND

UIO

W(F1

SS30

8G-67

-

I6

Service

Model

89018

-

I

CRI

IASSlS

PARl-1(OUIlEO

CIRCUIT

1

IS

SIDE

A

BN

it

IS

CIRCUIT

ON SIDE

I

SnIELD

IS

OH

CIRCUIT

SIDE

0

.

0

I,

OPTION

002

om"

0

I

R49

IS

YITM

C

INSUURD

HmlmIM

TUBING

I

1PI

TP2

"Hsy

lP3

sy

lP4

TP5 TP8 TP7

END

7

D

Wl -2

ANGLE

ARE

CIRCUIT

BRACKETS

OH

SIDE

I

0

.

E

2

"a,

-

3

1

0000000000000000000000

XAIO

0000000000000000000000

I

J2-3-6

ON

CIRCUIT SIDE

A26

A10

A29

I

A

I

B

I

C

I

Component

Locators

D

I

~50

AM

CALIBRATOR

80-68

Agilent 8901B Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual