Midland Radio SP-300 User Manual

SP-300 Series

SERVICE
MANUAL

Maxon America, Inc. 10828 N.W. Airworld Dr. Kansas City, MO 64153 Tel: [phone] Fax: [phone]

Part Number: 680-100-0155

April 2001

MAXON

SP-300 HAND HELD

TABLE OF CONTENTS

SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

DESCRIPTION OF CONTROLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

THEORY OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

DIGITAL CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

RF CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

RF CIRCUITS PLL SYNTHESIZER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

RECEIVER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

MAINTENANCE AND REPAIR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

REMOVING & REPLACING THE BELT CLIP . . . . . . . . . . . . . . . . . . . . . . . 13

REMOVING & REPLACING THE BATTERY . . . . . . . . . . . . . . . . . . . . . . . 14

REMOVING & REPLACING PTT ASSY. . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

REMOVING & REPLACING THE ACCESSORY CONNECTOR . . . . . . . . 15

REMOVING & REPLACING THE ANTENNA & CONTROL KNOBS . . . . 15

REMOVING & REPLACING THE BACK COVER . . . . . . . . . . . . . . . . . . . . 16

REMOVING & REPLACING THE MAIN BOARD . . . . . . . . . . . . . . . . . . . . 17

REMOVING & REPLACING THE DAUGHTER BOARDS . . . . . . . . . . . . . 19

REMOVING & REPLACING THE SPEAKER . . . . . . . . . . . . . . . . . . . . . . . . 19

COMPONENT REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

PROGRAMMING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

ALIGNMENT PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

TEST EQUIPMENT SETUP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

ALIGNMENT POINTS DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

VOLTAGE CHARTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

SP-300 SERIES UHF & VHF DIGITAL SECTION PARTS LIST . . . . . . . . . 29

SP-300 SERIES VHF RF SECTION PARTS LIST . . . . . . . . . . . . . . . . . . . . . . 31

SP-300 SERIES UHF RF SECTION PARTS LIST . . . . . . . . . . . . . . . . . . . . . . 34

COMPONENT PINOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

SCHEMATICS & BLOCK DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

VHF FRONT-END . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

VHF POWER AMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

UHF POWER AMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

UHF FRONT-END . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

VHF V.C.O. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

UHF V.C.O. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

TCXO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

ACC-200 BATTERY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

FUSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

P.T.T. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Digital Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

VHF RF Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

UHF RF Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

PCB LAYOUTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

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May 2001

MAXON
SP-300 HAND HELD

Board Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Exploded View. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

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May 2001

MAXON

SP-300 HAND HELD

SPECIFICATIONS

GENERAL

Equipment Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hand portable

Band . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . UHF/ VHF

Channel Spacings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.5 kHz, 25 kHz programmable

RF Output Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5/ 1 watt

Modulation Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F3E

Audio Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400 mW (Ext with 8 ohm)

400 mW (Int with 2 ohm)

Intermediate Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45.1 MHz & 455 kHz

Number of Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16/ 4

Frequency Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Synthesizer

Operation Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Intermittent

90 : 5 : 5 (Standby: RX: TX)

Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rechargeable Nickel-metal Hydride

Battery, 7.5 VDC +/- 10 %

TEMPERATURE RANGE

Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . From - 40° C to + 80° C

Operating. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . From - 30° C to + 60° C

CURRENT CONSUMPTION

Off. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . < 1 mA

Standby (Muted) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . < 30 mA (Battery Save On)

< 60 mA (Battery Save Off)

Unmuted, 100 % Max AF Power . . . . . . . . . . . . . . . . . . . . . . . . . < 500 mA

Transmit 5 Watt RF Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . < 2.4 A

BATTERY LIFE (5-5-90% Duty Cycle)

1350 mAh. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Hrs @ 5 W

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May 2001

MAXON
SP-300 HAND HELD

FREQUENCY BANDS

RX TX

VHF: V2 148.000 - 174.000 MHz 148.000 - 174.000 MHz

UHF: U2 440.000 - 470.000 MHz 440.000 - 470.000 MHz

DIMENSIONS

Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (141mm)H x (58 mm)W x (37 mm)D

WEIGHT

Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225 grams

With 1350 mAh Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 425 grams

TRANSMITTER

Carrier Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . High: 5.0W

Low: 1.0W

AUDIO FREQUENCY DEVIATION

Without Subaudio Tone Modulation:

25 kHz Channel Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Max. ±5.0 kHz

12.5 kHz Channel Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Max. ±2.5 kHz

With Subaudio Tone Modulation @ 10 % Peak Deviation

25 kHz Channel Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Max. ±5.0 kHz

12.5 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Max. ±2.5 kHz

Audio Frequency Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Within +1/-3dB of 6dB octave

ADJACENT CHANNEL POWER

25 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . < 70 dBc

12.5 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . < 60 dBc

Conducted Spurious Emission . . . . . . . . . . . . . . . . . . . . . . . . . . . . < -60 dBc

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May 2001

MAXON

SP-300 HAND HELD

Transmitter Audio Distortion (Without CTCSS) . . . . . . . . . . . . < 5% @ 1 kHz

Hum & Noise:

12.5 kHz Channel Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . > 40 dB (with PSOPH)

25 kHz Channel Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . > 40 dB (with no PSOPH)

Load Stability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No osc at ³ 10:1 VSWR all phase angles

a n d s ui t a b l e a n te n n a

Peak Deviation @ 1 kHz (Nom. Dev +20dB)

25 kHz Channel Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Max. 5.0 kHz

12.5 kHz Channel Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Max. 2.5 kHz

RECEIVER

Sensitivity (12dB Sinad) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . UHF: < -117 dBm(.31µV)

VHF: < -118 dBm(.28µV)

Amplitude Characteristic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . < ±3 dB

Adjacent Channel Selectivity:

25 kHz Channel Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >60 dB

12.5 kHz Channel Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >50 dB

Spurious Response Rejection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 dB

Intermodulation Response Rejection . . . . . . . . . . . . . . . . . . . . . . 65 dB

Temperature Stability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.0005% (-30°C to +60°C)

Conducted and Radiated Spurious Emission . . . . . . . . . . . . . . . . Per FCC and IC Rules and Regulations

AF Distortion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . < 5%

Frequency Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 dB/octave de-emphasized response in

the range 300 Hz - 3000 Hz

RX Hum & Noise:

25 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . < 40 dB

12.5 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . < 40 dB

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May 2001

MAXON
SP-300 HAND HELD

RX TONE DEMODULATION CHARACTERISTICS

SUBAUDIO TONES - CTCSS

Tone Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 Hz to 250.3 Hz

Non-Standard Tones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 Hz to 260 Hz

Due to continuing research and development the company reserves the right to alter these
specifications without prior notice.

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May 2001

MAXON

SP-300 Series HAND HELD

SP-300

The SP-300 Series of portable radios from Maxon, utilizes
the latest technology in its design and manufacturing. Both
the VHF and UHF models are PLL (Phase Lock Loop Syn­thesizer) / microprocessor controlled, and offer 1 or 5 watts
of power with 4 & 16 channel capability. Multiple functions
including Scan, CTCSS / DCS signaling and 12.5 & 25 kHz
channel spacing are standard in these fully programmable
wide bandwidth handheld units.

INTRODUCTION FEATURES

Main Features

• Wideband

•Scan Mode

• Busy Channel Lockout/Marked Idle Enable

• Standard/Non-Standard CTCSS/DCS Signaling

• Transmit Time-Out Timer/Tx Inhibit

• Beep Tone Enable/Disable

• Low Battery Indication

• Memory Protect

• External Option Detect

• 5/1 Watts Programmable RF Power

• Battery Save Circuitry

• Locking Accessory Connector

Wideband

This software is made to work and control the wide band
receiver/transmitter boards.

Scan Mode

During programming of the radio, any channel can be
selected as a scanned channel. When a channel is selected as
a scanned channel, it becomes part of the scan list. The scan
list will be activated by switching to the channel that was
selected as the scan channel during programming of the sys-

tem parameters.
The channel that was selected as the scan channel can still be
used as a receive only channel when in scan mode or receive
and transmit channel if the channel has been programmed for
“Priority Scan TX”.

Scan Channel Delete

When the unit is in scan mode the monitor button can be
pushed to delete a channel from the scan list. If the monitor
button is pushed while scanning has stopped to monitor an
active channel, that channel will be deleted from the scan
list. The channel will remain inactive in the scan list until
the scan mode is re-initiated by switching off the scan list
channel and switching back to the scan list channel. Any
number of channels can be deleted from the scan list in this
way. The scan list is always initiated with all the scan list
channels active.

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May 2001

MAXON
SP-300 HAND HELD

A priority channel can be selected while programming the
radio. A priority channel is a channel that can be period
cally checked or looked back to while receiving on any chan-

nel in the scan list, or in normal operation. It can also be
selected for all transmissions during scan mode.

To transmit on a channel in the scan list, the channel selector
must be placed on the channel that the transmission is to be
made on. As a system programmable option, it is possible to
transmit on a scanned channel while the channel selector is
on the scan list channel. This is the “Normal Scan TX”
option. If this option is enabled the PTT can be pushed dur­ing the scan wait time and the transmission will be on the
channel that was just activated. If this option is disabled, the
transmission will be on the priority channel (if there is no
priority channel programmed the transmission will be inhib­ited and out-of-lock indicator will be issued).

Any channel, whether it is in the scan list or not, can be des­ignated as a look back channel. When a channel is desig­nated as a look back channel, and the channel is selected, the
radio will periodically look back to the priority channel dur­ing reception on the selected channel. The radio does not
require a scan list to be entered in order to use this function,
however, the radio MUST
for the function to work.

have a priority channel selected

Busy Channel Lockout

i-

If this feature is enabled, the unit will not transmit when a
carrier is present. A beep tone will sound when the PTT is
depressed.

Marked Idle Enable

If this function is enabled, the unit will transmit provided
that the correct programmed CTCSS tone or DCS code has
been decoded. This function is essential for repeater opera­tion.

Normal/Inverted DCS

This function is selected by channel during programming of
the radio. During programming of each channel of the radio,
a selective signaling option for TX and RX is selected.
When the DCS signaling option is elected, it can be selected
as either normal or inverted. The selection can be made dif­ferently for TX and RX.

Standard/Non-Standard CTCSS

When programming a channel with CTCSS, any frequency
from 55 to 250 Hz can be selected in 0.1 Hz increments. The
radio is capable of encoding and decoding two non-standard
CTCSS tones.

• NOTE: The programmer must disallow the program­ming of a channel as a look back channel if no priority
channel was selected.

The channel scan speed is system programmable in a range
of 50 milliseconds to 2 seconds in 10 millisecond incre­ments. The default value is 100 milliseconds.

Scan Delay Time

Scan delay time is system programmable. The scan delay is
the time the unit remains on a scanned channel, after receiv­ing or transmitting on that channel. The time is programma­ble from 1 to 10 in 1 second increments. The default value is
4 seconds.

The scan delay time will be reset each time the receive chan­nel is active and each time the PTT is pushed on that chan­nel. As long as the conversation continues on the channel,
the receiver or the transmitter is active before the scan delay
time expires, the unit will not resume scanning.

As a programmable option, the LED on the top panel of the
unit will flash at the scan rate while in the scan mode. If the
“LED scan indication” is programmed to enable the LED
will flash. If it is programmed to disable, the LED will not
flash.

Transmit Time-Out-Timer (TOT)/TX Inhibit

The time-out-timer is system programmable for 10 seconds
to 990 seconds, in 10 second increments and can also be
selected as disabled. The addition to this feature is a pro­grammable lock-out-timer that inhibits the radio transmitter
for a specified time after the time-out time expires.

When the time-out-timer function is enabled, and the TX
inhibit function is disabled, the radio will transmit after the
time-out-timer has expired and the PTT button is released
and depressed again. With the TOT and TX inhibit, the
radio will not transmit after the time-out has expired, even if
the PTT is released and depressed again. Transmission will
not be allowed until the TX inhibit time has expired. TX
inhibit time is system programmable from 5 to 60 seconds in
5 second increments. The radio will beep one time, 5 sec­onds before the TOT time expires. This will indicate to the
user that the transmitter is about to be locked out. If the PTT
is released and depressed again anytime before the TOT has
expired, the TOT time will be reset. If the beep tone enable/
disable is set to disable, the one beep will not be issued. The
radio will beep 4 times when the TOT time expires. After
the TX inhibit time passes, the radio will beep one final time.

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May 2001

VCO Lock Time

The micro will allow more lock time for the VCO before the
out-of-lock beep indication.

Low Battery Indication

Low Battery Indication will be changed so that it does not
inhibit RX and will allow one transmission after low cell is
indicated. Low cell will not be indicated during transmit
mode. If the battery goes below specified limits during the
TX mode, low cell will be indicated immediately after
releasing the PTT button.

After the low cell indication is issued, the transmitter can
only be used one time. When the PTT is pushed again and
then released, the transmitter is locked out until the unit is
powered down and then powered back up.

Memory Protect

The software is such that if the radio is inadvertently put
into program mode it will not lose the contents of the
EEPROM memory. Data will only move in and out of the
memory when the programmer is attached.

MAXON

SP-300 Series HAND HELD

External Option Detect

An input to the microprocessor will be available that will
indicate to the microprocessor that the external option has
been selected. This input should be connected to the exter­nal option connector. External option should be selected for
each channel. If a channel is selected during programming
for external option, this input should be active when the
channel is selected during operation of the unit.

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May 2001

MAXON
SP-300 HAND HELD

DESCRIPTION OF CONTROLS

The controls, indicators and antenna connections on the VHF and UHF Scanning Handheld Series radios are all located on the
top panel. The accessories socket is located on the radio chassis right hand side. The monitor and PTT buttons are located on
the radio chassis left hand side.

ITEM DESCRIPTION

1. Antenna Connector 1/4" UNEF socket

2. 4 Channel Select Switch Rotary switch, used to select one of four and to engage in scanning function

3. 16 Channel Select Switch Rotary switch, used to select one of sixteen and to engage in scanning function

4. Status Indicator (busy TX/BT) Tri-colored LED indicator

5. ON/OFF Volume Control Main power switch and volume control. Fully counter-clockwise is OFF position

6. Battery Lock Used to lock the battery in place

7. Push-To-Talk Button Push to talk, release to listen

8. Monitor Button When pressed, monitors the chosen channel

9. Option

10. Speaker Sound reception

11. Microphone Sound transmission

12. External Speaker Socket used for external microphone with speaker

13. Belt Clip

14. Battery

15. Battery Charger Contacts

16. VHF Antenna

17. UHF Antenna

Used for controlling installed external option

Belt Clip

Power Supply

Contacts used for charging battery

Antenna
Antenna

ANT CH

4

3

2

1

1

CON701 Pinouts

CON701 - Pin 1

Pin Function

Data

1

Clock

2

N/C

VOL

2

ANT CH

7

8

9

7

4

1

16

3 4 5

VOL

11

13

3

+7.5V

4

N/C

5

N/C

6

Gnd

7

Mic+

8

N/C

9

Int_Spkr_Mic_Dsbl

10

Spkr+

11

N/C

12

12

10

11

13

16 17

6

maxon

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May 2001

14

15

MAXON

SP-300 HAND HELD

THEORY OF OPERATION

The VHF and UHF scanning handheld series radios are com­prised of one main PCB. The main PCB contains the trans­mitter, receiver and control circuits. The control circuits
contain the micro controller and associated digital circuits.

DIGITAL CIRCUITS

IC 411 is a digitally-controlled analog switch which inter­nally consists of three single pole, double throw switches.
By placing a high (5V) or low (0V) on the control lines
which consists of A, B and C. A controls the X ports, B con­trols the Y ports and C controls the Z ports. Example: A high
on control A would connect X to X1. A low on control A
would connect X to X0.

CTCSS/DCS Decode Circuits

Discriminator audio from Pin 9 IC5 is fed into and associ­ated parts, which are the first 2 poles of a 6th order 250 Hz
Chebeyshev low pass filter. The output from pin 1 (IC406A)
is fed into IC411 (Pin 2) and output to pin 15 (IC411). The
signal is then fed to Pin 8 (IC407) which is a 6th order low
pass Butterworth switched capacitor filter. The output from
the Butterworth filter (Pin 3 IC407) is then fed to the remain­ing 4 poles of the 6th order Chebeyshev, which consist of
IC406C and one of the two operational amplifiers internal to
IC407 (MF6-100) along with associated components. Both
the Chebeyshev and the Butterworth combines for a 4dB rip­ple low pass filter when programmed for 250 Hz. The output
of IC406C (Pin 8) is fed into the remaining operational
amplifier internal to IC407 (MF6-100) which forms the
squaring circuit for the Decode signal. The signal is output
from Pin 2 IC407 (MF6-100) and fed into IC409 (micro)
where it is matched with a preprogrammed frequency. If suc­cessful, a Decode occurs, which is shown by a green L.E.D.
on the top panel of the VHF and UHF Scanning Handheld
and audio is heard. If valid Decode was not seen, the busy
L.E.D. (Yellow) would be shown.

CTCSS/DCS Encoder Circuit

During TX encode the tone squelch digital signal is pro­duced as a 3-bit parallel word at Pins 15, 16, and 18 of the
micro controller (IC409). The 3-bit digital signal is con­verted to an analog signal by resistors R478, 479 and 480.
The analog signal is fed into IC411 Pin 1. The signal is out­put on Pin 15 (IC411) and fed into Pin 8 of IC407 (6th order
Butterworth clock tuned low pass filter). The filtered encode
output from Pin 3 (IC407) is fed into Pin 13 (IC411) and out­put on Pin 14 (IC411). The filtered encode signal is fed to
IC406B and RV403 (sub-audible gain control), the output of
IC406B is then fed to the audio mixer circuit.

External Mic/PTT Control Circuit

The external microphone is connected via the CON701 con­nector on the right side of the handheld. The internal mic and
speaker are disabled by grounding of pin 10 of CON701.
Pulling pin 10 of CON701 low will bring the base of Q702
low, switching the transistor off. This removes the ground
from the internal microphone, shutting it off. Pulling pin 10
of CON701 low will also pull the Gate of Q701 low, turning
it off. This will disconnect the speaker from the rest of the
circuit, shutting it off. To enable transmit the Q406 base
impedance is low (below 20k ohm), Q406 and Q407 turn on
and Q407 collector is low, which is connected to IC409
(micro) Pin-24.

Channel Select Circuit

One of 16 channels(SP-330 & 340) or one of 4 channels(SP­310 & SP-320) may be selected, using the channel switch on
the top panel. The channel switch encodes the channel num­ber selected into a 4-bit binary code. The binary code plus
one is equal to the channel number. The binary code is
decoded by the micro controller enabling the appropriate RX
or TX frequency and associated data to be selected from the
EEPROM.

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NOTE: Any of the channel locations may be a scan
ning position. Refer to Operators Manual for fur­ther instructions.

Low Battery Indicator Circuit

When the battery voltage drops below 5.4 VDC, D403 and
Q417 turn on. The micro controller disables the transmitter
and at the same time enables the red LED and sends an alert
tone to warn the user. The battery should be replaced or
recharged at this time (one tx allowed after low battery).

EEPROM

RX/TX channels, CTCSS/DCS as well as other data from
the programmer are stored in the EEPROM. The data stored
is retained without power supplied. This is a non-volatile
memory. The EEPROM may have information re-pro­grammed or erased. IC408 is an EEPROM with 2048
(8x256) capacity and data is written and read serially.

High Pass Filter

The high pass filter is an 8-pole, 1 dB Chebeyshev active fil­ter that comprises IC410 and associated components. The
de-emphasis is provided by resistor R451 and capacitor
C471. Receive audio is passed to IC410 by Pin 4 of IC411
where sub-audible tones below 300Hz are removed. Mic
audio is also fed into IC410 via IC 411 (Pin 4) where sub­audible voice products below 300Hz are also removed.

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Mute (squelch) Circuit

The mute circuit which is controlled by the output of IC409
(micro) Pin 77 (386EN) is connected to Q34 via R122 which
mutes the LM386IC on the RF circuits. Pin 77 also controls
IC402B which mutes the audio path to the RF circuits.

TX Audio And Filter Circuits

The TX audio from the internal mic or external mic is fed
into IC411 (Pin 3). The TX audio is output on Pin 4 (IC411)
and into the high pass filter (IC410), where sub-audible
voice products are removed. The TX audio output from
IC410 is fed into IC404D & C, with associated parts form a
mic amplifier and limiter. The output from Pin 8 IC404C is
fed to RV402 (TX Modulation Level Adjust) and fed into
IC404A & B to form a 3k low pass filter. The output of
IC404A (Pin 1) is then fed into the Audio Mixer Circuit.

Analog Ground Supply

IC406D supplies (2.0V) to operational amplifiers circuits.

Audio Mixer And Inverter

IC405A is an audio mixer where audio and sub-audible tones
are combined. RV401 is used as a balance control. IC405B is
an inverter.

Monitor

The unit will contain a switch mounted on the PTT assembly
for monitor function. This will be enabled or disabled by
programming software.

RF CIRCUITS

Transmitter

The transmitter is comprised of:

1. Buffer

2. P.A. Module

3. Low Pass Filter

4. Antenna Switch

5. A.P.C. Circuits

Buffer

VCO output level is -6 dBm and amplified to +10dBm
(UHF), +6dBm (VHF). The buffer consists of Q16 and Q17
for isolation and gain.

P.A. Module

The P.A. Module consists of Q501, Q502 and Q503. Three
stage amplifier Q501 amplifies the TX signal from +10 dBm
to 100 mW. Q502 is amplified to 1.0W. Q503 amplifies to
5W and then matched to 50 OHM using the L.C. network,
thereby reducing the harmonics by -30 dB.

Low Pass Filter

L7, L8, L11, C72, C73, C74 and C75 are the 7th order Che­byshev low pass filter. Unwanted harmonic are reduced by

-70 dBc.

Antenna Switch

When transmitting, the diodes D5 and D6 are forward biased
enabling the RF signal passage to the antenna. D6 is shorted
to ground inhibiting the RF signal to the front end. In receive
the diodes D5 and D6 are reversed biased passing the signal
from the antenna through L13 and C83 to the front end with­out signal loss.

Automatic Power Control (APC) Circuits

The APC circuit containing the variable resistors RV1, RV3,
IC3 and Transistors Q18,Q19,Q21 and Q22. The current
from the collector of Q503 is detected at R109, it is con­verted to voltage at IC3A and compared with the reference
voltage at IC3B. In transmit (+5V) is applied to the input of
IC3B via the potential divider R45 and R46. The differential
signal at the output of IC3B is passed to Q21 and Q22, This
voltage controls collector voltage of Q502 that produces a
constant power output. RV1 is used to adjust the high power
and RV3 is used to adjust the low power.

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RF CIRCUITS PLL SYNTHESIZER

12.8 MHz TCXO

The TCXO contains the 3-stage thermistor network compen­sation and crystal oscillator and modulation ports. Compen­sation is +/-5 PPM or less from -30c to +60c.

PLL IC Dual Modules Prescaler

Input frequency of 12.8 MHzto IC2 MC14519 pin 20 is
divided to 6.25 kHz or 5 kHz by the reference counter, and
then supplied to comparator. RF signal input from VCO is
divided to 1/64 at prescaler in IC2, Divided by A and N
counter in IC2 to determine frequency steps, and then sup­plied to the comparator. PLL comparison frequency is 6.25/5
kHz so that minimum programmable frequency step is 5/

6.25 kHz. A and N counter is programmed to obtain the
desired frequency by serial data in CPU. In comparator, the
phase difference between reference and VCO signals is com­pared. When the phase of reference frequency is leading, Fr
is output, but when VCO frequency is leading, Fv is the out­put. When Fv=Fr, phase detector out is very small 0v pulse.
64/65 modulus prescaler is comprised in IC2, and has two
output ports:

Port A pin 16: tx enable 2

Port B pin 15: prescaler power save control in PLL IC
pin 13 labeled test2 allows the technician to see the output of
the dual modules pre-scaler for trouble shooting purposes,
no connection should be made to this pin.

Level Shifter & Charge Pump

The charge pump is used for changing output signals Fr, Fv
at PLL IC from 0-5v to 0-12v necessary for controlling vco.

Reference Frequency LPF

The Loop Filter contains R12, C21 and C22. LPF settling
time is 12 mS with 1 kHz frequency. This also reduces the
residual side-band noise for the best signal-to-noise ratio.

DC to DC Converter

The DC to DC converter converts the 5v to 14-16v to supply
the necessary voltage for wide range of frequencies in the
VCO.

VCO

The VCO consist of an RX VCO and TX VCO. Is switched
TX/RX by power source. It is configured as a colpits oscilla­tor and connected to buffer as cascade bias in order to save
power.

The varicap diode D201/D301 are low-resistance elements
and produce a change in frequency with a change in reverse
bias voltage (2-11v). L203/L303 are resonant coil, which
changes the control voltage by the tuning core. D202 modu­lation diode, modulates the audio signal. C204 compensate

for the non-linearity of the vco due to modulation diode, and
maintain a constant modulation regardless of frequency.

RECEIVER

Front End

The receive signal is routed backward through the low pass
filter, then onward to Pin 1 of the Hybrid Receiver Front End
Module to a bandpass filter consisting of (VHF C622
through C608, L607 through L604) and (UHF C601 through
C610, L601 through L603) is coupled to the base of Q601
which serves as an RF amplifier. Diode D601 serves as pro­tection from static RF overload from nearby transmitters.
The output of Q601 is then coupled to a second bandpass fil­ter consisting of (VHF C607 through C601, L603 through
L601) and (UHF C612 through C623 and L604 through
L607). The output of Pin 6 is then coupled to the doubly bal­anced mixer D9. The receiver front end module is factory
pre-tuned and requires no adjustment. Repair is effected by
replacement of the entire module of the proper banded mod­ule. These are VHF 148 MHz to 174 MHz and UHF 440
MHz to 470 MHz. The receiver front end module signal pins
are as follows:

1. RF Input

2. Input Ground

3. N/A

4. Receive +5V

5. Ground

6. Output

First Mixer

D9, T2 and T3 are double balanced mixers which provide
the 45.1 MHz intermediate frequency output. The filtered
frequency from the front end module is coupled to T2. The

45.1 MHz IF output is matched to the input of the 2-pole
monolithic filter by L14, L31, C69 and C97. The crystal fil­ter provides a bandwidth of +/-7.2 kHz from the operating
frequency providing a high degree of spurious and intermod­ulation protection. Additionally, a 90 MHz trap (XF1) is also
placed at the filter output to provide additional attenuation of
the second order IMD. The output of the filter is impedance
matched by C97 and C69 to the base of the post of filter IF
amplifier Q25.

Second Oscillator Mixer Limiter And FM Detector

The output of the post filter amplifier, Q25, is coupled, via
C98 to the input of IC5 (MC3371). IC5 is a monolithic sin­gle conversion FM transceiver, containing a mixer, the sec­ond local oscillator, limiter and quadrature detector. Crystal
X1 44.645 MHz is used to provide resultant 455 kHz signal
from the output of the second mixer. The mixer output is
then routed to CF1 (455F) or CF2 (455HT). These ceramic

Page -11­May 2001

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SP-300 HAND HELD

filters provide the adjacent channel selectivity of 25 kHz or

12.5 kHz bandwidth.

Squelch (mute) Circuit

The squelch circuit switches off the power amplifier when
no audio signal is present. The squelch circuit consists of a
16 kHz band pass filter and a noise detector circuit.

16 kHz Band Pass Filter

The audio signal from Pin 9 of IC5 (MC3371) is filtered by a
16 kHz band pass filter consisting of L16 and L17. The noise
in the IF passband is accepted and voice frequencies and
their products are rejected. Any noise present at the output of
the filter is applied to the noise detector circuit via RV2.
RV2 is used to adjust the squelch circuit sensitivity and is
normally adjusted to produce a noise squelch opening sensi­tivity of 10 dB to 12 dB SINAD.

Noise Detector

The noise detector in conjunction with IC5 consists of Q26,
Q27, D8, D11, TH1, and their associated biasing compo­nents. Noise fed from the output of RV2 is amplified by
Q27, then rectified by D11. This output is then buffered by
Q26 and fed to Diode D8, which controls Q24 providing
ground to the mute control Pin 14 of IC5.

Low Pass Filter

A low pass filter formed by C115, C116 and R91 removes
any extraneous 455 kHz energy from the AF output of the
FM receiver chip.

Speaker Audio Amplifier

After signal detection and audio filtering, the low level audio
is returned to the RF circuit via VR3. This is then routed to
Pin 3 of IC6, (LM386N-3), to provide speaker audio. IC6 is
enabled by a logic high applied to Q34 which in turn enables
Q33, applying power to Pin 7 of IC6.

Page -12­May 2001

MAINTENANCE AND REPAIR

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SP-300 HAND HELD

GENERAL

Any repair or adjustment should only be made by or under the
supervision of a qualified radio service technician.

When removing or fitting, use the Exploded View and Parts
List (Page 51) in conjunction with the following procedures:

REMOVING & REPLACING THE BELT CLIP

Removing the belt clip:

1. Depress the metal release tab located on the top of
the belt clip with one hand.

2. With the other hand push the belt clip out of the belt
clip rail.

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Figure 1-Belt Clip Removal

To replace the belt clip:

1. With the slides of the belt clip positioned in line with
the belt clip guide rails, slide the belt clip into posi­tion until a click is heard.

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Figure 2-Belt Clip Installation

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REMOVING & REPLACING THE BATTERY

To remove the battery:

1. Holding the radio chassis in one hand, press and
hold the battery release catch on the upper back of
the radio with the other hand.

2. Pull the battery back and away from the radio.

3. Remove the battery from the radio.

To replace the battery:

1. Position the battery on the battery guide rail at the
bottom of the radio.

2. Move the top of the battery toward the radio until a
click is heard.

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Figure 3-Battery Removal

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REMOVING & REPLACING PTT ASSY.

To remove the PTT assembly:

1. Remove the 2 screws located at the top and bottom
of the PTT switch holder housing. This will allow
removal of the PTT holder (A) and PTT pad (B).

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Figure 4-PTT Removal

2. By placing thumb under bottom of the PTT assembly

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and gently pulling outward, unplug PTT Assembly
from Main Board.

To replace the PTT assembly:

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SP-300 HAND HELD

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1. Reverse the steps taken to remove the PTT assembly.

2. Insure that the PTT jack is aligned properly when
inserting into Main Board.

REMOVING & REPLACING THE ACCES­SORY CONNECTOR

To remove the Accessory Connector:

1. Remove the Accessory Connector Cover (Item 2) by
removing the screw (Item 1).

2. Remove the Accessory Connector (Item 5) by
removing the two screws (Items 3 & 4) and pulling
outwards on the Connector (Item 5)

To replace the Accessory Connector:

1. Reverse the steps taken to remove the Accessory
Connector.

Figure 5-PTT Installation

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Figure 6-A/C Removal & Installation

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REMOVING & REPLACING THE ANTENNA & CONTROL KNOBS

To remove the Antenna:

1. Turn the Antenna counterclockwise and remove.

To replace the Antenna:

1. Reverse the steps taken to remove the Antenna.

To remove the Control Knobs:

1. Grip the control knobs firmly between thumb and
index finger and pull in a straight upward direction.

To replace the Control Knobs:

1. Reverse the steps taken to remove the Control
Knobs.

Page -15­May 2001

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Figure 7-Control Knob Removal & Installation

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REMOVING & REPLACING THE BACK COVER

To remove the Back Cover:

1. Remove battery. (Refer to Removing &Replacing
the Battery)

2. Unscrew the four Back Cover mounting screws
located on the Back Cover of the radio.

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Figure 8-Back Cover Removal & Installation

3. Remove the Back Cover by pulling the lower battery
bracket away from the radio.

4. The Back Cover can now be removed by pulling the
Back Cover away from the radio chassis. The self
forming gasket ring (A) should remain on the Back
Cover.

To replace the Back Cover:

1. Reverse the steps taken to remove the Back Cover.

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Figure 8B-Back Cover Removal & Installation

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REMOVING & REPLACING THE MAIN BOARD

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SP-300 HAND HELD

To remove the Main Board:

1. Remove the Battery (Refer to Removing & Replac­ing the Battery).

2. Remove the PTT Assembly (Refer to Removing &
Replacing the PTT Assembly).

3. Remove the Dust Cap (Refer to Removing &
Replacing the Dust Cap).

4. Remove the Antenna & Control Knobs (Refer to
Removing & Replacing the Antenna & Control
Knobs).

5. Remove the Back Cover (Refer to Removing &
Replacing the Back Cover).

6. Insert a small straight (Flat Head) screwdriver blade
between the Main Board and the radio chassis.

7. Gently pull backward with the screwdriver until the
Main Board has been unsnapped from the lower sec­tion of the chassis.

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Figure 9-Main Board Removal & Installation

8

8. It may be necessary to pull the Main Board up a little
more to gain easier handling for removal.

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CAUTION: If performing step 8, insure that the
screwdriver is placed on the metal frame of the Main
Board and not directly on the Main Board PCB.
Damage to the Main Board and Microprocessor
could occur.

9. Grip the Main Board near the indicated arrows as
shown in Figure 9B.

10. Gently work the Main Board in an up & down
motion and pull in the direction indicated by the
arrow in Figure 9B.

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CAUTION: Do not use excess force when removing
the Main Board from the chassis. Damage to the
speaker connection could occur.

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Note: It is not necessary to remove the stud mount
antenna jack from the radio.

11. Remove the Speaker wire connector from the Main
Board connector.

Figure 9A-Main Board Removal & Installation

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Figure 9B-Main Board Removal & Installation

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To replace the Main Board

1. Reverse the steps taken to remove the Main Board.

2. When installing the Main Board into the chassis
insure that the LED light guide is aligned properly.

3. When installing the Main Board into the chassis,
place 2 fingers over the black rubber control knob
dust covers to insure that the dust covers do not get
pushed out of the appropriate seating position.

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Figure 9C-Main Board Removal & Installation

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REMOVING & REPLACING THE DAUGH­TER BOARDS

The Daughter Boards are soldered into the Main Board
Assy.

1. Remove the Main Board (Refer to Removing &
Replacing the Main Board).

2. Unsolder the appropriate Daughter Board from the
Main Board Assembly.

To Replace a Daughter Board:

1. Ensure that the Main Board Assembly and Daugh­ter Board are mechanically clean.

2. Insert the daughter board in the required position.

3. Ensure the Daughter Board is properly seated in the
Main Board Assembly.

4. Solder the Daughter Board into position.

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CAUTION: To avoid damage to the Main Board
Assembly, soldering must be accomplished
quickly. Refer to Component Replacement section
of manual located on this page.

REMOVING & REPLACING THE SPEAKER

COMPONENT REPLACEMENT

Surface Mount Components

Surface mount components should always be replaced using
a temperature controlled soldering system. The soldering
tools may be either a temperature controlled soldering iron
or a temperature controlled hot-air soldering station. A hot­air system is recommended for the removal of components
on these boards. With either soldering system, a temperature
of 700° F (371° C) should be maintained.

The following procedures outline the removal and replace­ment of surface mount components. If a hot-air soldering
system is employed, see the manufacturer’s operating
instructions for detailed information on the use of your sys­tem.

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CAUTION: Avoid applying heat to the body of any
surface mount component using standard soldering
methods. Heat should be applied only to the metal­ized terminals of the components. Hot-air systems
do not damage the components since the heat is
quickly and evenly distributed to the external sur­face of the component.

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CAUTION: The CMOS Integrated Circuit devices
used in this equipment can be destroyed by static
discharges. Before handling one of these devices,
service technicians should discharge themselves by
touching the case of a bench test instrument that has
a 3-prong power cord connected to an outlet with a
known good earth ground. When soldering or des­oldering a CMOS device, the soldering equipment
should have a known good earth ground.

To remove the speaker:

1. Remove the Main Board (Refer to Removing &
Replacing the Main Board).

2. Unscrew the two speaker mounting bracket screws
from the chassis.

3. Desolder the two pin wire harness from the speaker.

4. Remove the speaker.

To replace the speaker

1. Reverse the steps taken to remove the speaker.

Surface Mount Removal

1. Grip the component with tweezers or small needle
nose pliers.

2. Alternately heat the metalized terminal ends of the
surface mount component with the soldering iron.
If a hot-air system is used, direct the heat to the ter­minals of the component. Use extreme care with the
soldering equipment to prevent damage to the
printed circuit board (PCB) and the surrounding
components.

3. When the solder on all terminals is liquefied, gently
remove the component. Excessive force may cause
the PCB pads to separate from the board if all sol­der is not completely liquefied.

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SP-300 HAND HELD

4. It may be necessary to remove excess solder using a
vacuum de-soldering tool or Solder wick . Again,
use great care when de-soldering or soldering on
the printed circuit boards. It may also be necessary
to remove the epoxy adhesive that was under the
surface mount component and any flux on the
printed circuit board.

Surface Mount Component Replacement

1. “Tin” one terminal end of the new component and
the corresponding pad of the PCB. Use as little sol­der aspossible.

2. Place the component on the PCB pads, observing
proper polarity for capacitors, diodes, transistors,
etc.

3. Simultaneously touch the “tinned” terminal end and
the “tinned” pad with the soldering iron. Slightly
press the component down on the board as the sol­der liquefies. Solder all terminals, allowing the
component time to cool between each application
of heat. Do not apply heat for an excessive length of
time and do not use excessive solder.

the Surface Mount Component Replacement procedures. it
may not be necessary to “tin” all (or any) of the IC pins
before the installation process.

With a hot-air system, apply hot air until all “tinned” areas
are melted and the component is seated in place. It may be
necessary to slightly press the component down on the
board. Touch-up the soldered connections with a standard
soldering iron if needed. Do not use excessive solder.

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CAUTION: Some chemicals may damage the inter­nal and external plastic parts of the radio.

4. Allow the component and the board to cool and
then remove all flux from the area using alcohol or
another approved flux remover.

Surface Mounted Integrated Circuit Replacement

Soldering and de-soldering techniques of the surface
mounted IC’s are similar to the above outlined procedures
for the surface mounted chip components. Use extreme care
and observe static precautions when removing or replacing
the defective (or suspect) IC’s. This will prevent any damage
to the printed circuit board or the surrounding circuitry.
The hot-air soldering system is the best method of replacing
surface mount IC’s. The IC’s can easily be removed and
installed using the hot-air system. See the manufacturer’s
instructions for complete details on tip selection and other
operating instructions unique to your system. If a hot-air sys­tem is not available, the service technician may wish to clip
the pins near the body of the defective IC and remove it. The
pins can then be removed from the PCB with a standard sol­dering iron and tweezers, and the new IC installed following

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SP-300 HAND HELD

PROGRAMMING

The SP-300 Series portable radios require the ACC-2300
programming cable. With the 25 pin “D” type connector
installed on the computer, take the other end of the program­ming cable and insert it in the receptacle located on the
opposite side of the PTT on the radio. For further informa­tion, please refer to the ACC-904 Programming Manual.

Cloning

Following the steps below, the frequencies and functions can
be programmed from radio to radio by using a cloning cable.

1. Ensure that both radios’ power switches are in the
“OFF” Position.

2. Place master radio (the radio which already has
desired program information in the EEPROM) in
the data “WRITE” mode by holding the radio’s
monitor switch and then turning radio power switch
to the “ON” position (the green LED on the radio
flashes). Release monitor switch on the fourth led
flash. (The radio LED will change to alternating red
and orange flashes.)

ALIGNMENT PROCEDURE

The SP-300 U/V Receiver is by design, broad band, cover­ing UHF(440 to 470 MHz) and VHF(148-174MHz) and
should require no special alignment, unless repairs are per­formed on the receiver portion. The only alignment normally
required is to the squelch circuit.

SQUELCH ADJUSTMENT

1. Select a receiver channel that is programmed for
narrow band (12.5kHz) operation.

2. Set the RF signal generator to the receiver fre­quency. Set the AF modulation signal to 1 kHz at

1.5K deviation.

3. Adjust the RF output level of the RF signal genera­tor until the 1kHz signal is heard.

4. Adjust the RF signal to the level desired for squelch
sensitivity as you monitor SINAD. This is usually
8dB to 12 dB sinad.

5. On the Main board, adjust RV2 until the squelch is
just unmuted (open).

3. Place the slave radio (the radio which is not pro­grammed, or has program information that will be
revised) into data “READ” mode by holding moni­tor switch and then turning the radio power switch
to the “ON” position (the green LED on the radio
flashes). Release the monitor switch on the third led
flash (the LED will change to alternating green and
orange flashes).

4. Connect the cloning cable through mic jack.

5. Press the slave radio’s monitor switch. The alternat­ing green and orange flashing will stop.

6. Press the master radio’s monitor switch. The alter­nating red and orange flashing will stop. Release
the monitor switch, the green led of both radios will
flash.

7. After cloning, the slave radio resets and works nor­mally with re-programmed frequency, and the mas­ter radio flashes orange led. Press monitor switch,
and then the radio will repeat step 2).

6. Switch off the RF generator (squelch should close).

7. Switch on the RF generator, Squelch should open at
the SINAD point where RV2 was adjusted.

8. Select a receiver channel that is programmed for
wide band operation (25kHz).

9. Set the RF signal generator to the receiver fre­quency. Set the AF modulation signal to 1 kHz at
3K deviation.

10. Adjust the RF output level of the RF signal genera­tor until the 1kHz signal is heard.

11. Adjust the RF signal to the level desired for squelch
sensitivity as you monitor SINAD. This is usually
8dB to 12 dB SINAD.

12. On the Main board, adjust RV4 until the squelch is
just unmuted (open).

13. Switch off the RF generator (squelch should close).

8. For cloning other radios, repeat steps 3 through 7.

Page -21­May 2001

14. Switch on the RF generator, Squelch should open at
the SINAD point where RV4 was adjusted.

MAXON
SP-300 HAND HELD

15. Disconnect the test equipment.
Should repairs be required, the following procedures should
be applied:

RX VCO

1. Set the unit to the highest receive frequency, 470

MHz(UHF), 174MHz(VHF) and adjust the VCO
L303 to 10 volts.

2. Set the unit to the lowest receive frequency 440

MHz(UHF), 148(VHF) and check that the VCO
voltage is above 2.0 volts. Adjust L303 for 2.0
volts.

Note: Use TP1 to measure the voltage.

z

RECEIVER

1. Apply a standard test signal to the receiver antenna

terminals.

2. Adjust T1 for maximum sensitivity and audio out-

put with minimum audio distortion.

TRANSMITTER

Connect the unit to a Service Monitor with the power meter
setting to the 10 W scale (or autorange).

TCXO

Set the channel selector to the mid-range frequency 460
MHz, adjust TC701(VHF) on the TCXO board, RV5 (UHF)
on the Main board, for a reading of 460 MHz +/-200 Hz (155
MHz VHF models).

TX VCO

1. Set the unit to the highest transmit frequency, 470

MHz(UHF), 174MHz(VHF) and adjust the VCO
L203 to 10 volts.

1b. Switch to a channel with the same frequency and

CTCSS of 250.3Hz. Push PTT and adjust RV401 to
desired CTCSS tone deviation, same as above step.

1c. Switch between the 67Hz channel and the 250.3Hz

channel and adjust RV401 until the deviation is the
same on both channels. It may be necessary to read­just RV403 to get the desired deviation.

2. Inject a 6mV signal of 1000Hz to the microphone
input. This should produce a 3kHz deviation for
25kHz(S) channel spacing and 1.5kHz for

12.5kHz(N) channel spacing, measure transmit dis­tortion, that should be less than 5%. Increase the
audio input level to 20mV.

3. Set the deviation by adjusting RV402 to 4.5kHz for
25kHz channel spacing(S) and to 3kHz for 12.5kHz
channel spacing(N) on a non-CTCSS or DCS chan­nel for the initial setting. Select a CTCSS or DCS
frequency and verify that the deviation is less than
or equal to 5kHz(S) and 3kHz(N).

4. Vary the audio frequency from 300 to 3000Hz and
verify that the deviation does not exceed 5kHz(S)
and 3kHz(N).

APC

1. Select a channel which is programmed with high
power. While transmitting, adjust RV1 in the APC
circuit for 5 watts +/- 0.1 watt.

2. Select a channel which is programmed with low
power. While transmitting, adjust RV3 in the APC
circuit for 1watt +/-0.1 watt.

2. Set the unit to the lowest transmit frequency 440
MHz(UHF), 148(VHF) and check that the VCO
voltage is above 2.0 volts. If voltage is below 2.0
volts, adjust L203 for 2.0 volts or more.

CTCSS, DCS & DEVIATION ALIGNMENT

1a. Set the unit to a mid-frequency range and a CTCSS

of 67Hz. Push PTT and adjust RV403 for desired
CTCSS tone deviation.

Page -22­May 2001

TEST EQUIPMENT SETUP

WATT METER 20dB

AUDIO

MODULATION- METER

MAXON

SP-300 HAND HELD

DC POWER SUPPLY

RADIO

RADIO

AUDIO GENERATOR

OSCILLOSCOPE

SPECTRUM ANALYZER

154.625445681125661

FREQUENCY COUNTER

VOLT METER

SSG

OSCILLOSCOPE

3K Dev @ 1K (25 kHz Channel Spacing)

1.5K Dev @ 1K (12.5 kHz Channel Spacing)

DC POWER SUPPLY

1. S.S.G. : @ 1kHz Audio:

DISTORTION METER

SINAD METER

Page -23­May 2001

MAXON
SP-300 HAND HELD

ALIGNMENT POINTS DIAGRAM

RV1

RV3

RV401

L203

RV2

RV4

T1

TCXO1

TC701

L303

TP1

RV1

RV3

RV401

L203

RV2

RV4

T1

RV5

L303

TP1

RV402

RV403

ALIGNMENT POINTS VHF & UHF

WITH TCXO MODULE

RV402

RV403

ALIGNMENT POINTS UHF WITH

OUT TCXO MODULE

Page -24­May 2001

SP-300 HAND HELD

TROUBLESHOOTING GUIDE

SYMPTOMS CAUSES COUNTER MEASURES

1. Complete discharge of battery (7.5v+/-10%) 1. Replace battery

Unit does not Work 2. Fuse blown up (4a) 2. Replace fuse

3. 5v voltage source 3. IC1 (5v+/-0.2v)

1. Low battery (lower than 5.6v) 1. Replace or charge battery

Warning Tone & No Work 2. Pll error 2. Check TCXO/ VCO/ PLL IC

3. Filtering error 3. Check LPF (IC407)
4 .EEPROM fail 4. Re-programming

Defective RX Audio 1. No audio at speaker 1. Replace speaker or check wire

2. Busy lamp (yellow Color) is o.k. but no Audio 2. Check tone ch, audio amp(IC6) 300hz
HPF (IC410) Sw IC (IC402B, IC411)

1. Defective ANT sw 1. Check D5,D6

2 .Defective front-end 2. Check Q601

Bad RX Sensitivity 3. Defective dbm 3. Check D9,T2,T3

(-10 to -60db) 4. IF IC 4. Replace IC5

5. VCO level drop 5. Rx VCO level>2dbm

6. Change of 1st local Frequency 6. Retune TCXO

1. VCO frequency change or level drop 1. Repair RX VCO

Defective RX 2. Defective voltage source 2. Defective IF IC(IC5)

3. IC1,Q1,Q3

1. Defective 12.8 MHz TCXO 1. Replace TCXO

PLL Error 2. Voltage source for Rx VCO/TX VCO 2. Check RX VCO/TX VCO

3. Defective PLL IC 3. Replace IC2

Low TX power Output 1. APC 1. Re-adjust RV1

1. TX buffer 1. Check Q16,17

No TX power 2. Power module 2. Check Q501,502,503

3. APC control 3. Check Q22,D4

No modulation 1. Condenser mic 1. Check mic

2. Sw IC & mic amp IC 2. Check IC411, 410, 405, 401,404

No s.a.t.(tone) 1. 250 hz LPF 1. Check IC406,407,411

2. RV403 adjustment 2. Re-adjust RV403

No programming 1. Short protector VCC 1. Check 6v on Q412, 413

2. Defective programming lead

MAXON

Page -25­May 2001

MAXON
SP-300 HAND HELD

CONTROL CIRCUIT

VOLTAGE CHARTS

RX

TX

REF # B C E B C E

Q401 4.4 0.0 5.0 0.3 5.0 5.0

Q403 0.0 4.6 GND 0.0 4.6 GND

Q404 5.0 2.2 2.0 0.0 7.0 0.0

Q405 5.0 1.8 1.7 5.0 1.8 1.7

Q406 4.0 0.0 5.0 2.0 5.0 5.0

Q407 0.0 4.5 GND 5.0 0.0 GND

Q408 0.0 5.0 GND 2.0 0.0 GND

Q410 4.3 0.0 5.0 4.3 0.0 5.0

Q411 0.0 - GND 0.0 0.0 GND

Q412 0.0 7.5 7.5 0.0 7.5 7.5

Q413 7.5 0.0 GND 7.5 0.0 GND

z

NOTE: Q402 and Q409 are not fitted on this model series.

MAIN CIRCUIT

RX TX

REF # B C E B C E

Q1 0.6 5.0 5.0 0.6 5.0 5.0

Q2 5.0 0.0 5.0 0.3 4.7 5.0

Q3 0.0 4.7 5.0 5.0 0.0 5.0

Q4 0.0 5.0 5.0 0.0 5.0 5.0

Q5 4.7 0.0 5.0 4.7 0.0 5.0

Q6 4.0 18.0 5.0 4.0 18.0 5.0

Q7 18.0 ~3.0 18.0 18.0 ~4.0 18.0

Q8 5.0 0.0 5.0 5.0 0.0 5.0

Q11 0.0 3.0 0.0 0.0 4.0 0.0

Q12 1.6 4.5 1.0 0.0 0.0 0.0

Q13 4.6 4.6 4.0 0.0 0.0 0.0

Q14 0.0 0.0 0.0 4.6 4.6 4.0

Q16 0.0 0.0 0.0 1.4 4.8 0.8

Q17 0.0 0.0 0.0 0.6 3.0 GND

Q18 0.0 0.0 0.0 5.0 0.2 GND

Q21 0.0 0.0 0.0 ~3.0 ~5.6 ~2.4

Q22 7.5 0.0 7.5 6.9 ~7.0 7.5

Q24 0.0 4.5 GND 0.0 0.0 GND

Q25 0.7 4.0 GND 0.0 0.0 GND

Q26 - - - 0.0 0.0 0.0

Q27 0.7 NOISE GND 0.0 0.0 GND

Q33 7.2 4.0 7.5 6.9 7.5 7.5

Q34 0.0 6.6 GND 2.0 0.0 GND

z

NOTE: Q9, 10, 15, 19, 20, 23 and 28 - 32 are not fitted on this model series.

z

NOTE: ~ indicates approximate voltage. Actual voltage may vary.

Page -26­May 2001

RECEIVE STATE

PIN # IC1 IC2 IC3 IC5 IC6 IC401 IC402

1 GND 1.6 - 4.0 1.4 0.0 0.0

2 GND 5.0 - 3.5 GND 1.0 0.0

3 GND 5.0 - 4.0 0.0 1.3 AUDIO

4 5.0 5.0 - 4.1 GND 0.0 0.0

5 GND 5.0 - 3.8 AUDIO 0.0 5.0

6 7.5 0.0 - 3.8 7.5 0.0 0.0

7 0.0 - 3.8 4.0 0.0 0.0

8 0.0 - 4.2 1.5 2.0 0.0

9 5.0 AUDIO 0.0 4.0

10 2.6 0.8 4.0 0.0

11 2.6 1.0 4.0 0.0

12 5.0 0.0 5.0 0.0

13 3.0 4.0 0.0 0.0

14 5.0 GNS 5.0 5.0

15 0.0 0.0

16 0.0 1.8

17 5.0

18 0.0

19 0.0

20 2.5

MAXON

SP-300 HAND HELD

PIN # IC404 IC406 IC407 IC408 IC410 IC411

1 - 3.0 1.9 0.0 AUDIO 2.0

2 - 1.9 0.0 0.0 AUDIO AUDIO

3 - 1.9 1.9 0.0 AUDIO 4.0

4 - 5.0 1.9 0.0 5.0 AUDIO

5 - 1.9 1.9 GND AUDIO AUDIO

6 - 1.9 5.0 5.0 AUDIO GND

7 - 1.9 1.9 5.0 AUDIO GND

8 - 1.9 A 5.0 AUDIO GND

9 - 1.9 CLK AUDIO 0.0

10 - 1.9 0.0 AUDIO 0.0

11 - GND 5.0 5.0 5.0

12 - 1.9 0.0 AUDIO 0.0

13 - 1.9 1.9 AUDIO 1.9

14 - 1.9 1.9 AUDIO 1.9

15 AUDIO

16 5.0

17

18

19

20

z

NOTE: IC4, 403 and 405 are not fitted on this model series.

Page -27­May 2001

MAXON
SP-300 HAND HELD

TRANSMIT STATE

PIN # IC1 IC2 IC3 IC5 IC6 IC401 IC402

1 GND 1.6M 0.0 - 1.3 1.9 0.0

2 GND 5.0 0.0 - GND 1.9 0.0

3 GND 5.0 0.0 - 0.0 1.9 0.0

4 5.0 5.0 GND - GND 1.9 0.0

5 GND 5.0 - - 1.5 0.0 0.0

6 7.5 0.0 - - 7.5 0.0 0.0

7 0.0 - - 7.5 0.0 GND

8 0.0 5.0 - 1.5 1.9 0.0

9 5.0 - 1.9 2.1

10 2.6 - 2.1 0.0

11 2.6 - 2.2 0.0

12 5.0 - 2.2 0.0

13 3.0 - 5.0 0.0

14 0.0 - 5.0 5.0

15 0.0 5.0

16 5.0 5.0

17 5.0

18 0.0

19 0.0

20 2.5

PIN # IC404 IC406 IC407 IC408 IC410 IC411

1 A 3.7 1.9 0.0 AUDIO 2.0

2 AUDIO 1.9 0.0 0.0 AUDIO 4.0

3 AUDIO 1.9 1.9 0.0 AUDIO 1.9

4 5.0 5.0 1.9 0.0 5.0 1.9

5 AUDIO 1.9 1.9 GND AUDIO 0.0

6 AUDIO 1.9 5.0 5.0 AUDIO GND

7 AUDIO 1.9 1.9 5.0 AUDIO GND

8 AUDIO 1.9 A 5.0 AUDIO GND

9 AUDIO 1.9 CLK AUDIO 5.0

10 AUDIO 1.9 0.0 AUDIO 5.0

11 GND 0.0 5.0 GND 0.0

12 AUDIO 1.9 0.0 AUDIO 1.9

13 AUDIO 1.9 1.9 AUDIO 1.9

14 AUDIO 1.9 1.9 AUDIO 0.0

15 0.0

16 5.0

17

18

19

20

Page -28­May 2001

SP-300 HAND HELD

SP-300 SERIES UHF & VHF DIGITAL SECTION PARTS LIST

MAXON

REF# DESCRIPTION PART#

DIGITAL SECTION VHF& UHF (COMMON PARTS)

PTT SWITCH BOARD (SEE NOTE1) 650-180-0017
FUSE BOARD ASSY 650-200-0004

C136 CAP,TA,100UF 293D107X0006E2T6V 102-013-3107
C400 CAP,CER,0.0068UF,50V,5%,X7R,1/16W,0603 100-521-1682
C404 CAP,CER,.047UF,0603, 100-813-1473
C405 CAP,CER,0.001UF,10%,50V,X7R,0603 100-621-1102
C406 CAP,CER,0.1UF,+80-20%,25V,Y5V,0603 100-813-1104
C413 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C414 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C415 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C416 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C417 CAP,CER,220PF,5%,50V,COG,0603 100-520-1221
C418 CAP,CER,220PF,5%,50V,COG,0603 100-520-1221
C419 CAP,CER,220PF,5%,50V,COG,0603 100-520-1221
C420 CAP,CER,220PF,5%,50V,COG,0603 100-520-1221
C421 CAP,CER,220PF,5%,50V,COG,0603 100-520-1221
C422 CAP,CER,0.01UF,5%,50V,X7R,0603 100-521-1103
C423 CAP,TA,10UF,293D106X06R3A2T6.3V 102-013-0106
C424 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C425 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C426 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C427 CAP,CER,0.001UF,10%,50V,X7R,0603 100-621-1102
C428 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C429 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C430 CAP,CER,0.1UF,+80-20%,25V,Y5V,0603 100-813-1104
C431 CAP,TA,4.7UF,20%,10V,3216 102-023-0475
C432 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C433 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C434 CAP,CER,0.1UF,+80-20%,25V,Y5V,0603 100-813-1104
C435 CAP,CER,0.1UF,10%,50V,X7R,0603 100-621-1104
C436 CAP,CER,0.022UF,10%,50V,X7R,0603 100-621-1223
C437 CAP,CER,1UF,+80-20%,16V,Y5V,0805 100-803-2105
C438 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C439 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C441 CAP,CER,0.0018UF,50V,10%,X7R,1/16W,0603 100-621-1181
C442 CAP,CER,0.022UF,10%,50V,X7R,0603 100-621-1223
C443 CAP,CER,0.0047UF,10%,50V,X7R,0603 100-621-1472
C444 CAP,CER,0.01UF,5%,50V,X7R,0603 100-521-1103
C446 CAP,CER,47PF,5%,50V,COG,0603 100-520-1470
C448 CAP,CER,47PF,5%,50V,COG,0603 100-520-1470
C449 CAP,CER,0.033UF,10%,16V,X7R,0603 100-601-1333
C452 CAP,CER,0.1UF,10%,25V,X7R,0805 100-611-2104
C453 CAP,CER,0.0033UF,50V,10%,X7R,1/16W,0603 100-621-1332
C454 CAP,CER,.68UF,+/-20%,50V,Y5V,0805 100-723-2684
C455 CAP,CER,.082UF,10%,50V,X7R,0805 100-621-2823
C456 CAP,CER,120PF,0603,5%,50V 100-520-1121
C458 CAP,CER,0.1UF,10%,25V,X7R,0805 100-611-2104
C459 CAP,CER,0.1UF,+80-20%,25V,Y5V,0603 100-813-1104
C460 CAP,CER,15PF,5%,50V,COG,0603 100-520-1150
C461 CAP,CER,15PF,5%,50V,COG,0603 100-520-1150
C462 CAP,CER,.047UF,+80-20%,50V,Y5V,0805 100-823-2473
C463 CAP,CER,.047UF,+80-20%,50V,Y5V,0805 100-823-2473

NOTES:

1. Components are not available,assembly is non-repairable.

REF# DE SCRIPTION PART#
C464 CAP,CER,.033UF,10%,50V,0805 100-623-2333
C465 CAP,CER,.033UF,10%,50V,0805 100-623-2333
C466 CAP,CER,.033UF,10%,50V,0805 100-623-2333

C467 CAP,CER,.033UF,10%,50V,0805 100-623-2333

C468 CAP,CER,.033UF,10%,50V,0805 100-623-2333

C469 CAP,CER,.047UF,+80-20%,50V,Y5V,0805 100-823-2473

C470 CAP,CER,1UF,+80-20%,16V,Y5V,0805 100-803-2105

C471 CAP,CER,0.1UF,+80-20%,25V,Y5V,0603 100-813-1104

C472 CAP,CER,0.001UF,10%,50V,X7R,0603 100-621-1102

C474 CAP,CER,1UF,+80-20%,16V,Y5V,0805 100-803-2105

C476 CAP,CER,0.1UF,+80-20%,25V,Y5V,0603 100-813-1104

C477 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471

C478 CAP,TA,10UF,293D106X0004A2T4V 102-003-0106

C479 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471

C480 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471

C481 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471

C482 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471

C483 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471

C484 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471

C485 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471

C701 CAP,TA,10UF,293D107X0006E2T6V 102-013-3107

CH404 SW,ROTARY,EC10RP04-66(4Channel) 830-010-0010

CH404 SW,ROTARY,EC10RP04-66(16Channel) 830-010-0011

CON401 CONN, SMTSTRIPS,MMT-104-01-T-SH-P-TR 140-030-0062

CON404 SKT,14P/SIP,STR,LP,52231-1417 140-020-0032

CON406 PIN,HDR,4P/SIP,R ANG,SHROUD,WAF, 140-030-0043

CON701 CONNECTOR SOCKET SSW-106-02-G-D-RA 140-020-0054

D401 DIODE,SW,KDS181S,SOT-23 220-010-0004

D402 DIODE,SW,KDS181S,SOT-23 220-010-0004

D403 DIODE,SW,KDS193,SOT-23 220-010-0003

D404 DIODE,SW,KDS184S,SOT-23 220-010-0002

D405 DIODE,ZNR,5.6V,SOT-23,0.225W,MMBZ5232 221-010-0056

D406 DIODE,ZNR,5.6V,SOT-23,0.225W,MMBZ5232 221-010-0056

D407 DIODE,ZNR,5.6V,SOT-23,0.225W,MMBZ5232 221-010-0056

D701 DIODE,ZNR,5.6V,SOT-23,0.225W,MMBZ5232 221-010-0056

IC401 IC,SW/MUX,MC14066BDR2,SO-14,A-SW 444-050-0001

IC402 IC,SW/MUX,MC14066BDR2,SO-14,A-SW 444-050-0001

IC404 IC,OPAMP,KIA324F,SO-14,QUAD 441-030-0002

IC405 IC,OPAMP,LM358M,SO-8,DUALOPAMP 441-030-0006

IC406 IC,OPAMP,KIA324F,SO-14,QUAD 441-030-0002

IC407 IC,FILTER,BLP,MF6CWM-100,SO-14 441-090-0001

IC408 IC,EEPROM,AT93C56-10SI,SO-08,2K,VCC2-5V 442-010-0003

IC409 IC,CPU,OTP,HD4074818H,FP-80A,4BIT 443-103-0001

IC410 IC,OPAMP,KIA324F,SO-14,QUAD 441-030-0002
IC411 IC,A-MUX/DEMUX,MC14053BD,SO-16,3PDT 440-060-0001
L410 COILCHIP,10UH:LER015T100K 371-005-3103
LED1 LEDCHIP,SML-020MLTT86SMD 240-030-0035

Q401 TRANS,BRT,PNP,KRA110SPK,SOT-23,SW,PK 870-010-0010

Q403 TRANS,BRT,NPN,KRC104S,SOT-23,SW,ND 870-020-0001

Q404 TRANS,BRT,NPN,KRC104S,SOT-23,SW,ND 870-020-0001

Q405 TRANS,BRT,NPN,KRC104S,SOT-23,SW,ND 870-020-0001

Q406 TRANS,PNP,BRT,KRA101S,SOT-23,SW,PA 870-010-0002

Q407 TRANS,NPN,KRC101S,BRT,SOT-23 870-020-0002

Q410 TRANS,KRA104S,SOT-23 870-010-0005

Q411 TRANS,BRT,NPN,KRC104S,SOT-23,SW,ND 870-020-0001

Q412 TRANS,KRA104S,SOT-23 870-010-0005

Page -29­May 2001

MAXON
SP-300 HAND HELD

REF# DESCRIPTION PART#

Q413 TRANS,BRT,NPN,KRC104S,SOT-23,SW,ND 870-020-0001

Q416 TRANS,BRT,PNP,KRA110SPK,SOT-23,SW,PK 870-010-0010

Q417 TRANS,PNP,KTA1504(Y),SOT-23,SW 870-100-0004

Q701 FET, 2SK 1579-TMOS 870-030-0001

Q702 TRANS,,NPN,KTC3875S(BL) 870-200-0006

R9 RES,TF,68,5%,1/10W,TC250,0805 741-117-2680

R9A RES,TF,68,5%,1/10W,TC250,0805 741-117-2680

R100 RES,TF,470,5%,1/16W,TC250,0603 741-102-1471

R200 RES,1.2K 1/16W5%T1608 741-102-1122

R400 RES, 9.1K 1/16W 5% T 1608 741-102-1912

R401 RES,TF,680K, 5%, 1/16W, +/-200, 0603 741-102-1684

R402 RES,8.2K,1/16W,5%,T 1608 741-102-1822

R403 RES,8.2K,1/16W,5%,T 1608 741-102-1822

R404 RES,8.2K,1/16W,5%,T 1608 741-102-1822

R405 RES,TF,100K,5%,1/16W,+/-200,0603 741-102-1104

R406 RES,8.2K,1/16W,5%,T 1608 741-102-1822

R408 RES,TF,22K,5%,1/16W, +/-200,0603 741-102-1223

R410 RES,TF,3.3K,5%,1/16W,+/-200,0603 741-102-1332

R411 RES,TF,270K,1/16W 5%T1608 741-102-1274

R412 RES,TF,22K,5%,1/16W, +/-200,0603 741-102-1223

R414 RES,TF,10K,5%,1/16W, +/-200,0603 741-102-1103

R415 RES,TF,47K,5%,1/16W, +/-200,0603 741-102-1473

R416 RES,TF,10K,5%,1/16W, +/-200,0603 741-102-1103

R418 RES,TF,560, 5%,1/16W, +/-200,0603 741-102-1561

R421 RES,TF,47K,5%,1/16W, +/-200,0603 741-102-1473

R422 RES,TF,47K,5%,1/16W, +/-200,0603 741-102-1473

R423 RES,1.2K 1/16W5%T1608 741-102-1122

R424 RES,TF,10K,5%,1/16W, +/-200,0603 741-102-1103

R425 RES,220K,1/16W,5%,T 1608 741-102-1224

R426 RES,1.2K,1/16W,5%,T1608 741-102-1122

R427 RES,TF,100K,5%,1/16W,+/-200,0603 741-102-1104

R428 RES,TF,10K,5%,1/16W, +/-200,0603 741-102-1103

R429 RES,27K,1/16W,5%,T1608 741-102-1273

R430 RES,220K,1/16W,5%,T1608 741-102-1224

R431 RES,TF,47K,5%,1/16W, +/-200,0603 741-102-1473

R432 RES,TF,4.7K,5%,1/16W,+/-200,0603 741-102-1472

R433 RES,TF,47K,5%,1/16W, +/-200,0603 741-102-1473

R434 RES,TF,47K,5%,1/16W, +/-200,0603 741-102-1473

R435 RES,TF,6.8K,5%,1/16W,+/-200,0603 741-102-1682

R439 RES,TF,3K,5%,1/16W,T1608 741-102-1302

R440 RES,TF,4.7K,5%,1/16W,+/-200,0603 741-102-1472

R441 RES,3.9K,1/16W5%T 1608 741-102-1392

R442 RES,27K,1/16W5%T 1608 741-102-1273

R443 RES,TF,2.4K,5%,1/16W,+/-200,0603 741-102-1242

R444 RES,TF, 82K,5%,1/16W,+/-200,0603 741-102-1823

R446 RES,820,1/16W,5%,T1608 741-102-1821

R447 RES,220K,1/16W,5%,T1608 741-102-1224

R449 RES,TF,20K,5%,1/16W,+/-200,0603 741-102-1203

R450 RES,TF,33K,5%,1/16W,+/-200,0603 741-102-1333

R451 RES,TF,10K,5%,1/16W, +/-200,0603 741-102-1103

R452 RES,TF,2.2K,5%,1/16W,TC250,0603 741-102-1222

R453 RES,TF,1M,5%,1/16W,+/-200,0603 741-102-1105

R454 RES,TF,22K,5%,1/16W, +/-200,0603 741-102-1223

R456 RES,TF,22,1/16W,5%,T 1608 741-102-1220

R457 RES,TF,22K,5%,1/16W, +/-200,0603 741-102-1223

R460 RES,TF,47K,5%,1/16W, +/-200,0603 741-102-1473

REF# DESCRIPTION PART#

R461 RES,TF,1M,5%,1/16W,+/-200,0603 741-102-1105

R464 RES,TF,4.7K,5%,1/16W,+/-200,0603 741-102-1472

R469 RES,TF,2.2K,5%,1/16W,TC250,0603 741-102-1222

R470 RES,30K,1/16W5%T 1608 741-102-1303

R471 RES,30K,1/16W5%T 1608 741-102-1303

R472 RES,36K,1/16W5%T 1608 741-102-1363

R473 RES,43K,1/10W,5%,T2012 MCR10EZH433J 741-117-2433

R474 RES,43K,1/10W,5%,T2012 MCR10EZH433J 741-117-2433

R475 RES,TF,47K,5%,1/16W, +/-200,0603 741-102-1473

R476 RES,360K,1/10W,5%,T2012 741-117-2364

R477 RES,TF,120K,5%,1/16W, +/-200,0603 741-102-1124

R483 RES,TF,2.2K,5%,1/16W,TC250,0603 741-102-1222

R484 RES,TF,4.7K,5%,1/16W,+/-200,0603 741-102-1472

R485 RES,TF,220K,5%,1/16W,T1608 741-102-1224

R487 RES,TF,120K,5%,1/16W, +/-200,0603 741-102-1124

R488 RES,TF, 0,5%,1/16W, +/-200,0603 741-102-1000

R489 RES,TF,4.7K,5%,1/16W,+/-200,0603 741-102-1472

R490 RES,TF,2.2K,5%,1/16W,TC250,0603 741-102-1222

R493 RES,TF,22K,5%,1/16W, +/-200,0603 741-102-1223

R701 RES,TF,2.2K,5%,1/16W,TC250,0603 741-102-1222

R702 RES,TF,12K,5%,1/16W T 1608 741-102-1123

R703 RES,TF,12K,5%,1/16W T 1608 741-102-1123

R704 RES,TF,100K,5%,1/16W,+/-200,0603 741-102-1104

RV401 POT,ROTARY,47K,3MMDIA,SMD 901-001-0473

RV402 POT,ROTARY, 22K,SMD 901-001-0223

RV403 POT,ROTARY,47K,3MMDIA,SMD 901-001-0473

X401 XTAL,3.579545MHZ,CP12A,12PF 162-000-0036

DIGITAL SECTION(VHFPARTS)

C447 CAP,CER,0.022UF,10%,50V,X7R,0603 100-621-1223

C486 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471

R409 RES,TF,150K,5%,1/16W, +/-200,0603 741-102-1154

R417 RES,TF,560, 5%,1/16W, +/-200,0603 741-102-1561

R459 RES,1.2K 1/16W5%T1608 741-102-1122

R478 RES,TF,39K,5%,1/16W,TC250,0603 741-102-1393

R479 RES,TF,20K,5%,1/16W,+/-200,0603 741-102-1203

R480 RES,TF,10K,5%,1/16W, +/-200,0603 741-102-1103

R486 RES,TF,33K,5%,1/16W,+/-200,0603 741-102-1333

DIGITAL SECTION(UHF PARTS)

C447 CAP,CER,0.0018UF,5%,50V,X7R,0805 100-621-2185

C486 N/A

R409 RES,TF,220K,5%,1/16W,TC250,0603 741-107-1224

R417 RES,TF,2.2K,5%,1/16W,TC250,0603 741-102-1222

R459 RES,TF,10K,5%,1/16W, +/-200,0603 741-102-1103

R478 RES,200K,1/16W,5%,T1608 741-102-1204

R479 RES,TF,100K,5%,1/16W,+/-200,0603 741-102-1104

R480 RES,51K,1/16W,5%,T1608 741-102-1513

R486 RES,18K,1/16W,5%,T1608 741-102-1183

Page -30­May 2001

SP-300 HAND HELD

SP-300 SERIES VHF RF SECTION PARTS LIST

MAXON

REF # DESCRIPTION PART #

REPLACEMENT MODULES

FRONT ENDASSY, VHF(SEE NOTE 1) 650-110-0012
VCOTX/RX ASSY, VHF (SEE NOTE 1) 650-030-0021
POWERAMPASSY, VHF(SEE NOTE 1) 650-230-0012
TCXO ASSY, VHF(SEE NOTE 1) 650-100-0002

COMPONENTS

C1 CAP,CER,0.001UF,10%,50V,X7R,0603 100-621-1102

C2 CAP,TA,10UF,293D106X06R3A2T6.3V 102-013-0106

C3 CAP,CER,0.001UF,10%,50V,X7R,0603 100-621-1102

C4 CAP,CER,0.001UF,10%,50V,X7R,0603 100-621-1102

C5 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471

C6 CAP,TA,4.7UF,20%,10V,3216 102-023-0475

C7 CAP,CER,0.001UF,10%,50V,X7R,0603 100-621-1102

C8 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471

C9 CAP,CER,0.001UF,10%,50V,X7R,0603 100-621-1102

C11 CAP,CER,0.1UF,+80-20%,25V,Y5V,0603 100-813-1104

C12 CAP,TA,10UF,293D106X06R3A2T6.3V 102-013-0106
C13 CAP,CER,0.01UF,5%,50V,X7R,0603 100-521-1103

C14 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471

C15 CAP,CER,0.1UF,+80-20%,25V,Y5V,0603 100-813-1104

C16 CAP,CER,2PF,.25%,50V,COG,0603 100-020-1020

C17 CAP,CER,0.1UF,+80-20%,25V,Y5V,0603 100-813-1104

C18 CAP,CER,0.001UF,10%,50V,X7R,0603 100-621-1102

C19 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471

C20 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471

C21 CAP,METAL,POLY,0.33UF,63VBOX 083-013-2334

C22 CAP,METAL,POLY,.022UF,63VBOX 083-013-2223

C23 CAP,MYLAR,.01UF,63VKBOXTYPE 083-014-2103

C24 CAP,MYLAR,.01UF,63VKBOXTYPE 083-014-2103

C25 CAP,CER,1UF,+80-20%,16V,Y5V,0805 100-803-2105

C26 CAP,CER,0.1UF,+80-20%,25V,Y5V,0603 100-813-1104

C34 CAP,CER,220PF,5%,50V,COG,0603 100-520-1221

C35 CAP,CER,0.001UF,10%,50V,X7R,0603 100-621-1102

C36 CAP,CER,14PF,5%,50V,COG,0805 100-520-2140

C37 CAP,CER,33PF,5%,50V,COG,0603 100-520-1330

C38 CAP,CER,43PF GRM40COG430J50VPT 100-520-2430

C39 CAP,CER,0.001UF,10%,50V,X7R,0603 100-621-1102

C42 CAP,CER,0.001UF,5%,50V,COG,0805 100-520-2102

C43 CAP,CER,3PF,.25PF,50V,COG,0603 100-020-1030
C44 CAP,TA,4.7UF,20%,10V,3216 102-023-0475

C45 CAP,CER,10PF,.5%,50V,COG,0603 100-120-1100

C46 CAP,CER,8PF,50V,.5PF,COG,1/16W,0603 100-120-1080

C47 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471

C50 CAP,CER,33PF,5%,50V,COG,0603 100-520-1330

C51 CAP,CER,10PF,5%,50V,COG,0603 100-120-1100

C53 CAP,CER,1UF,+80-20%,16V,Y5V,0805 100-803-2105

C54 CAP,CER,0.001UF,10%,50V,X7R,0603 100-621-1102

C55 CAP,CER,0.001UF,10%,50V,X7R,0603 100-621-1102

C57 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471

C58 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471

REF # DESCRIPTION PART #

C59 CAP,CER,0.47UF GRM40Y5V474Z16VPT 100-803-2474

C60 CAP,TA,4.7UF,20%,10V,3216 102-023-0475

C61 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C62 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C63 CAP,CER,0.01UF,5%,50V,X7R,0603 100-521-1103
C64 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C65 CAP,TA,10UF,20%,10V,B,3528 102-023-1106
C66 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C67 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C68 CAP,CER,0.001UF,5%,50V,COG,0805 100-520-2102

C70 CAP,CER,1UF,+80-20%,16V,Y5V,0805 100-803-2105
C72 CAP,CER,6PF,0.5PF,50V,COG,0805 100-120-2060
C73 CAP,CER,30PF,5%,50V,COG,0805 100-520-2300
C74 CAP,CER,36PF GRM40COG360J50VPT 100-520-2360
C75 CAP,CER,24PF,5%,50V,COG,0805 100-520-2240
C76 CAP,CER,9PF,0.5PF,50V,COG,0805 100-020-2090
C77 CAP,CER,0.001UF,5%,50V,COG,0805 100-520-2102
C78 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C79 CAP,CER,0.1UF,+80-20%,25V,Y5V,0603 100-813-1104
C81 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C82 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C83 CAP,CER,7PF,.5PF,50V,COG,0603 100-120-1070
C84 CAP,CER,0.001UF,10%,50V,X7R,0603 100-621-1102
C86 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C87 CAP,CER,27PF,5%,50V,COG,0603 100-520-1270

C88 CAP,CER,0.1UF,+80-20%,25V,Y5V,0603 100-813-1104
C90 CAP,CER,7PF,.5PF,50V,COG,0603 100-120-1070
C92 CAP,CER,18PF,5%,50V,COG,0603 100-520-1180
C93 CAP,CER,82PF,5%,COG,50V,0603 100-520-1820
C94 CAP,CER,1UF,+80-20%,16V,Y5V,0805 100-803-2105
C95 CAP,TA,4.7UF,20%,10V,3216 102-023-0475
C96 CAP,CER,0.01UF,5%,50V,X7R,0603 100-521-1103
C97 CAP,CER,30PF,5%,50V,COG,0603 100-520-2300
C98 CAP,CER,0.001UF,10%,50V,X7R,0603 100-621-1102
C102 CAP,CER,0.1UF,10%,25V,X7R,0805 100-611-2104
C103 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C104 CAP,CER,0.001UF,10%,50V,X7R,0603 100-621-1102
C105 CAP,CER,47PF,5%,50V,COG,0603 100-520-1470
C106 CAP,CER,0.01UF,5%,50V,X7R,0603 100-521-1103
C107 CAP,CER,10PF,.5%,50V,COG,0603 100-120-1100
C108 CAP,CER,.0015UF,GRM39X7R152K50VPT 100-621-1151
C109 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C111 CAP,CER,0.1UF,10%,25V,X7R,0805 100-611-2104
C112 CAP,CER,0.033UF,10%,16V,X7R,0603 100-601-1333
C113 CAP,CER,0.1UF,10%,25V,X7R,0805 100-611-2104
C114 CAP,CER,0.01UF,5%,50V,X7R,0603 100-521-1103
C115 CAP,CER,220PF,5%,50V,COG,0603 100-520-1221
C116 CAP,CER,0.01UF,5%,50V,X7R,0603 100-521-1103
C117 CAP,CER,47PF,5%,50V,COG,0603 100-520-1470
C118 CAP,CER,33PF,5%,50V,COG,0603 100-520-1330
C121 CAP,CER,20PF,5%,50V,COG,0603 100-520-1200
C122 CAP,CER,0.001UF,5%,50V,COG,0805 100-520-2102
C123 CAP,CER,0.01UF,5%,50V,X7R,0603 100-521-1103
C124 CAP,CER,0.1UF,10%,25V,X7R,0805 100-611-2104
C125 CAP,CER,0.1UF,10%,25V,X7R,0805 100-611-2104
C126 CAP,CER,0.01UF,5%,50V,X7R,0603 100-521-1103
C127 CAP,CER,0.01UF,5%,50V,X7R,0603 100-521-1103

NOTES:

1. Components are not available,assembly is non-repairable.

Page -31­May 2001

MAXON
SP-300 HAND HELD

REF # DESCRIPTION PART #
C128 CAP,TA,10UF,20%,16V,3216 102-023-1106
C129 CAP,ELE,10UF,16V20%3X5 5.0PT 081-032-3106
C131 CAP,CER,0.01UF,5%,50V,X7R,0603 100-521-1103
C132 CAP,TA,4.7UF,20V,3528:293D475X0020B2T20V 102-043-1475
C133 CAP,TA,1.0UF,20%,16V,3216 102-033-0105
C134 CAP, CER,.047UF,0603, 100-813-1473
C135 CAP, TA,10UF, 293D106X0004A2T4V 102-003-0106
C136 CAP, TA, 100UF, 20%, 6.3V, D 102-013-3107
C137 CAP, CER,470PF,10%,50V,X7R,0603 100-621-1471
C145 CAP, CER,470PF,10%,50V,X7R,0603 100-621-1471
C146 CAP, CER,220PF,5%,50V,COG,0603 100-520-1221
C901 CAP, CER, 0.01UF,5%,50V,X7R,0603 100-521-1103
C902 CAP, CER, 0.01UF,5%,50V,X7R,0603 100-521-1103
C903 CAP, CER, 0.01UF,5%,50V,X7R,0603 100-521-1103
C904 CAP, CER, 0.01UF,5%,50V,X7R,0603 100-521-1103
C905 CAP, CER,18PF,5%,50V,COG,0603 100-520-1180
C906 CAP, CER,18PF,5%,50V,COG,0603 100-520-1180
C907 CAP, CER, 0.1UF,5%,25V,X7R,0603 100-813-1104
C908 CAP,CER,33PF,5%,50V,COG,0603 100-520-1330
C910 CAP, CER, 0.01UF,5%,50V,X7R,0603 100-521-1103
C911 CAP, CER, 0.01UF,5%,50V,X7R,0603 100-521-1103
C999 CAP,CER,20PF,5%,50V,COG,0603 100-520-1200
CF1 FILTER CERAMIC LT-455FW 310-101-0010
CF2 FILTER, CER,CF455HT,455KHZ 310-101-0013
CON701 CONNECTOR SOCKET,SSW-106-02-G-D-RA 140-020-0054
D1 DIODE,SW,KDS181S,SOT-23 220-010-0004
D5 DIODE,PIN,UPP9401,NEEDPKG SIZE 220-020-0001
D6 DIODE,PIN,UPP9401,NEEDPKG SIZE 220-020-0001
D8 DIODE,SW,KDS193,SOT-23 220-010-0003
D9 DIODEVARICAPCHIP ND433G 5V (SOP-08) 220-040-0009
D11 DIODE,SW,KDS193,SOT-23 220-010-0003
D12 DIODE,SW,KDS193,SOT-23 220-010-0003
D13 DIODE,SW,KDS181S,SOT-23 220-010-0004
D14 DIODE,SW,KDS181S,SOT-23 220-010-0004
D15 DIODE, CHIP,SM4004,400V,1A,SMD 220-030-0003
D17 DIODE,SCHOTTKY,CHIP,PRLL5817,SOD87 220-040-0008
D18 DIODE,KDS160 220-010-0017
D20 DIODE,KDS160 220-010-0017
D901 DIODE,SW,KDS226,SOT-23 220-010-0005
D902 DIODE,SW,KDS226,SOT-23 220-010-0005
FUSE1 FUSE,60V,4A,25NM-040-L 700-020-0002
IC1 IC,VREG,TK11450M,+5V,SOT-23L,(R5) 441-010-0002
IC2 IC,PLL,MC145193FR2,SO-20,RS-440 440-050-0011
IC3 IC,OPAMP,LM358M,SO-8,DUALOPAMP 441-030-0006
IC5 IC,VHFRCVR,MC3371D,SO-16,NWRBAND 441-060-0007
IC6 IC,AUDIOAMP,LM386M-1,0.33W,SO-8 441-040-0002
L1 COIL,CHIP,47NH,20%,LL2012-F47NM 371-010-5470
L3 COIL,1.2UH:NL252018T-1R2J 371-004-31R2
L4 COIL,0.1UH:NL252018T-R10J 371-804-3R10
L5 COIL,0.1UH:NL252018T-R10J 371-804-3R10
L6 COIL,CHIP, 1.0UH:NL252018T-1R0J 371-017-3102
L7 COILSPRING 3X0.55X4T:LSMD 350-000-0104
L8 COILSPRING 3X0.55X4T:LSMD 350-000-0104
L11 COILSPRING 3X0.55X4T:LSMD 350-000-0104
L13 COILSPRING 2.8X0.4X8T:L 350-000-0106
L14 COILCHIP,0.68UH:NL252018T-R68J 371-313-3681
L15 COILCHIP,0.15UH:NL252018T-R15J 371-004-3R15
L16 COIL,CHIP, 1000U,300SS-102K=CP3 370-013-4102

REF # DESCRIPTI ON PART #
L17 COIL,CHIP, 1000U,300SS-102K=CP3 370-013-4102
L18 COIL,CHIP, 1.0UH:NL252018T-1R0J 371-017-3102
L19 COILCHIP,10UH:LER015T100K 371-005-3103
Q1 TRANS,BRT,PNP,KRA102SPB,SOT-23,SW,(PB) 870-010-0007
Q2 TRANS,BRT,PNP,KRA110SPK,SOT-23,SW,PK 870-010-0010
Q3 TRANS,BRT,PNP,KRA110SPK,SOT-23,SW,PK 870-010-0010
Q4 TRANS,BRT,PNP,KRA110SPK,SOT-23,SW,PK 870-010-0010
Q5 TRANS,KRA104S,SOT-23 870-010-0005
Q6 TRANS,NPN,KTC3875(BL),SOT-23,SW,(ALL) 870-200-0006
Q7 TRANS,PNP,KTA1504(Y),SOT-23,SW 870-100-0004
Q8 TRANS,PNP,KTA1504(Y),SOT-23,SW 870-100-0004
Q11 TRANS,NPN,KTC3875(BL),SOT-23,SW,(ALL) 870-200-0006
Q12 TRANS,NPN,BFR92A,SOT-23,RFAMP,(P2P) 870-200-0020
Q13 TRANS,NPN,KTC3875(BL),SOT-23,SW,(ALL) 870-200-0006
Q14 TRANS,NPN,KTC3875(BL),SOT-23,SW,(ALL) 870-200-0006
Q16 TRANS,900MHZ AMP,MMB1321Q4LT1,SOT-23 870-200-0008
Q17 TRANS,900MHZ AMP,MMB1321Q4LT1,SOT-23 870-200-0008
Q18 TRANS,BRT,NPN,KRC104S,SOT-23,SW,ND 870-020-0001
Q19 TRANS,NPN,KTC3875(BL),SOT-23,SW,(ALL) 870-200-0006
Q21 TRANS,NPN,KTC3875(BL),SOT-23,SW,(ALL) 870-200-0006
Q22 TRANS,PNP,KTA1663(Y),SOT-89,HC/SW,(HY) 870-150-0002
Q23 TRANS,BRT,NPN,KRC104S,SOT-23,SW,ND 870-020-0001
Q24 TRANS,BRT,NPN,KRC104S,SOT-23,SW,ND 870-020-0001
Q25 TRANS,NPN,BFR92A,SOT-23,RFAMP,(P2P) 870-200-0020
Q26 TRANS,NPN,KTC3875(BL),SOT-23,SW,(ALL) 870-200-0006
Q27 TRANS,NPN,KTC3875(BL),SOT-23,SW,(ALL) 870-200-0006
Q28 TRANS,BRT,NPN,KRC104S,SOT-23,SW,ND 870-020-0001
Q31 TRANS,BRT,NPN,KRC104S,SOT-23,SW,ND 870-020-0001
Q32 TRANS,BRT,NPN,KRC104S,SOT-23,SW,ND 870-020-0001
Q33 TRANS,PNP,KTA1504(Y),SOT-23,SW 870-100-0004
Q34 TRANS,BRT,NPN,KRC104S,SOT-23,SW,ND 870-020-0001
Q901 TRANS,NPN,KTC4075,UMT3 870-200-0031
Q902 TRANS,KTA2014,MAX-900K 870-100-0018
Q903 TRANS,NPN,KTC4075,UMT3 870-200-0031
Q904 TRANS,NPN,KTC4075,UMT3 870-200-0031
Q905 TRANS,NPN,KTC4075,UMT3 870-200-0031
R1 RES,TF,10K,5%,1/16W, +/-200,0603 741-102-1103
R2 RES,TF,100K,5%,1/16W,+/-200,0603 741-102-1104
R3 RES,TF,2.2K,5%,1/16W,TC250,0603 741-102-1222
R4 RES,1.8K,1/16W,5%,T 1608 741-102-1182
R5 RES,1.8K,1/16W,5%,T 1608 741-102-1182
R6 RES,TF,2K, 1/16W,5%,T 1608 741-102-1202
R7 RES,1.8K,1/16W,5%,T 1608 741-102-1182
R8 RES,910,1/10W,5%,T 2012 741-117-2911
R11 RES,TF,100, 5%,1/16W, +/-200,0603 741-102-1101
R12 RES,TF,5.6K,5%,1/16W,T1608 741-102-1562
R13 RES,TF,2.7K,5%,1/16W,+/-200,0603 741-102-1272
R14 RES,TF,2.7K,5%,1/16W,+/-200,0603 741-102-1272
R15 RES,TF,100, 5%,1/16W, +/-200,0603 741-102-1101
R16 RES,910,1/10W,5%,T 2012 741-117-2911
R17 RES,TF,12K,5%,1/16W, +/-200,0603 741-102-1123
R21 RES,TF,100, 5%,1/16W, +/-200,0603 741-102-1101
R22 RES,TF,4.7K,5%,1/16W,+/-200,0603 741-102-1472
R23 RES,120 1/16W5%T 1608 741-102-1121
R24 RES,5.6K,1/16W,5%,T 1608 741-102-1562
R25 RES,TF,3.3K,5%,1/16W,+/-200,0603 741-102-1332
R26 RES,TF,18,1/16W, 5%,T 1608 741-102-1180
R27 RES,TF,4.7K,5%,1/16W,+/-200,0603 741-102-1472
R28 RES,56,1/16W, 5%,T 1608 741-102-1560
R35 RES,8.2K,1/16W,5%,T 1608 741-102-1822

Page -32­May 2001

MAXON

SP-300 HAND HELD

REF # DESCRIPTION PART #
R31 RES,TF,300,1/16W,5%,T 1608 741-102-1301
R32 RES,TF,300,1/16W,5%,T 1608 741-102-1301
R33 RES,TF,3.3K,5%,1/16W,+/-200,0603 741-102-1332
R34 RES,TF,18,1/16W, 5%,T 1608 741-102-1180
R36 RES,TF, 0,5%,1/16W, +/-200,0603 741-102-1000
R37 RES,TF,3.3K,5%,1/16W,+/-200,0603 741-102-1332
R41 RES,TF,100, 5%,1/16W, +/-200,0603 741-102-1101
R42 RES,TF,12K,5%,1/16W, +/-200,0603 741-102-1123
R43 RES,TF,10K,5%,1/16W, +/-200,0603 741-102-1103
R45 RES,TF,12K,5%,1/16W, +/-200,0603 741-102-1123
R46 RES,2.2K,1/16W5%T 1608 741-102-1222
R47 RES,TF,2.2,5%,1/10W,TC250,0805 741-117-2229
R48 RES,TF,2.2,5%,1/10W,TC250,0805 741-117-2229
R49 RES,TF,22,1/16W,5%,T 1608 741-102-1220
R50 RES,TF,1M,5%,1/16W,+/-200,0603 741-102-1105
R51 RES,TF,2.2,5%,1/10W,TC250,0805 741-117-2229
R52 RES,TF,3.3K,5%,1/16W,+/-200,0603 741-102-1332
R53 RES,TF,10K,5%,1/16W, +/-200,0603 741-102-1103
R54 RES,TF,1K,5%,1/16W,+/-200,0603 741-102-1102
R55 RES,TF,1.5K,5%,1/16W,+/-200,0603 741-102-1152
R56 RES,270 1/16W5%T 1608 741-102-1271
R57 RES,TF,100K,5%,1/16W,+/-200,0603 741-102-1104
R58 RES,TF,470K,5%,1/16W,TC1608,0603 741-102-1474
R59 RES,TF,39,5%,50V,0603 741-102-1390
R61 RES,68K 1/16W1%T1608 740-211-1683
R62 RES,68K 1/16W1%T1608 740-211-1683
R63 RES,TF,150,5%,1/16W,+/-200,0603 741-102-1151
R64 RES,TF,22,1/16W,5%,T 1608 741-102-1220
R65 RES,51,1/16W, 5%,T 1608 741-102-1510
R66 RES,TF,100, 5%,1/16W, +/-200,0603 741-102-1101
R67 RES,TF,22K,5%,1/16W, +/-200,0603 741-102-1223
R68 RES,TF,22K,5%,1/16W, +/-200,0603 741-102-1223
R69 RES,TF,470K,5%,1/16W,TC1608,0603 741-102-1474
R70 RES,TF,470K,5%,1/16W,TC1608,0603 741-102-1474
R71 RES,TF,1K,5%,1/16W,+/-200,0603 741-102-1102
R72 RES,TF,220K,5%,1/16W,TC1608,0603 741-102-1224
R74 RES,TF,22K,5%,1/16W, +/-200,0603 741-102-1223
R75 RES,TF,47K,5%,1/16W, +/-200,0603 741-102-1473
R76 RES,TF,22K,5%,1/16W, +/-200,0603 741-102-1223
R77 RES,TF,22K,5%,1/16W, +/-200,0603 741-102-1223
R78 RES,TF,2.7K,5%,1/16W,+/-200,0603 741-102-1272
R79 RES,56,1/16W, 5%,T 1608 741-102-1560
R81 RES,TF,2.7K,5%,1/16W,+/-200,0603 741-102-1272
R82 RES,TF,10K,5%,1/16W, +/-200,0603 741-102-1103
R83 RES,TF,18K,1/16W5%T 1608 741-102-1183
R84 RES,TF,18K,1/16W5%T 1608 741-102-1183
R85 RES,TF,39K,5%,1/16W,TC250,0603 741-102-1393
R86 RES,TF,1K,5%,1/16W,+/-200,0603 741-102-1102
R87 RES,TF,330K,5%,1/16W,+/-200,0603 741-102-1334
R88 RES,TF,100, 5%,1/16W, +/-200,0603 741-102-1101
R89 RES,TF,22,1/16W,5%,T 1608 741-102-1220
R91 RES,TF,470,5%,1/16W,TC250,0603 741-102-1471
R92 RES,TF,2.7K,5%,1/16W,+/-200,0603 741-102-1272
R93 RES,TF, 0,5%,1/16W, +/-200,0603 741-102-1000
R94 RES,TF,1K,5%,1/16W,+/-200,0603 741-102-1102

REF # DESCRIPTION PART #
R95 RES,TF,82K,5%,1/16W,+/-200,0603 741-102-1823
R96 RES,TF,39K,5%,1/16W,TC250,0603 741-102-1393
R97 RES,TF,10, 5%,1/16W, +/-200,0603 741-102-1100
R98 RES,TF,10K,5%,1/16W, +/-200,0603 741-102-1103
R99 RES,TF,100K,5%,1/16W,+/-200,0603 741-102-1104
R102 RES,TF,22K,5%,1/16W, +/-200,0603 741-102-1223
R103 RES,TF,10K,5%,1/16W, +/-200,0603 741-102-1103
R104 RES,TF,10K,5%,1/16W, +/-200,0603 741-102-1103
R105 RES,TF,30K,5%,1/16W, +/-200,0603 741-102-1303
R106 RES,TF,22K,5%,1/16W, +/-200,0603 741-102-1223
R108 RES,TF,56K,1/16W,5%,T 1608,0603 741-102-1563
R109 RES,0.1,1W1% 1218 740-521-0R10
R110 RES,TF,270, 5%,1/16W,+/-200,0603 741-102-1271
R111 RES,TF,10K,5%,1/16W, +/-200,0603 741-102-1103
R112 RES,TF,22K,5%,1/16W, +/-200,0603 741-102-1223
R113 RES,TF,470K,5%,1/16W,TC1608,0603 741-102-1474
R114 RES,TF,100K,5%,1/16W,+/-200,0603 741-102-1104
R115 RES,TF,22,1/16W,5%,T 1608 741-102-1220
R116 RES,TF,22K,5%,1/16W, +/-200,0603 741-102-1223
R117 RES,TF,22K,5%,1/16W, +/-200,0603 741-102-1223
R121 RES,TF,220K,5%,1/16W,1608 741-102-1224
R122 RES,TF,4.7K,5%,1/16W,+/-200,0603 741-102-1472
R123 RES,TF, 0,5%,1/16W, +/-200,0603 741-102-1000
R125 RES,TF,22,1/16W,5%,T 1608 741-102-1220
R130 RES,TF,100, 5%,1/16W, +/-200,0603 741-102-1101
R135 RES,TF,4.7M,5%,1/16W,+/-200,0603 741-102-1475
R901 RES,TF,2.2K,5%,1/16W,TC250,0603 741-102-1222
R902 RES,TF,2.2K,5%,1/16W,TC250,0603 741-102-1222
R903 RES,TF,4.7K,5%,1/16W,+/-200,0603 741-102-1472
R904 RES,TF,7.5K,5%,1/16W,50V,T1608,0603 741-102-1752
R905 RES,27K,1/16W5%T 1608 741-102-1273
R906 RES,TF,7.5K,5%,1/16W,50V,T1608,0603 741-102-1752
R907 RES,27K,1/16W5%T 1608 741-102-1273
R908 RES,TF,10, 5%,1/16W, +/-200,0603 741-102-1100
R909 RES,TF,470,5%,1/16W,TC250,0603 741-102-1471
RC56 RES,TF, 0,5%,1/16W, +/-200,0603 741-102-1000
RL2 RES,TF, 0,5%,1/16W, +/-200,0603 741-102-1000
RLK2 RES,TF, 0,5%,1/16W, +/-200,0603 741-102-1000
RLK3 RES,TF, 0,5%,1/16W, +/-200,0603 741-102-1000
RLK4 RES,TF, 0,5%,1/16W, +/-200,0603 741-102-1000
RLK5 RES,TF, 0,5%,1/16W, +/-200,0603 741-102-1000
RLK7 RES,TF, 0,5%,1/16W, +/-200,0603 741-102-1000
RLK12 RES,TF, 0,5%,1/16W, +/-200,0603 741-102-1000
RLK16 RES,TF, 0,5%,1/16W, +/-200,0603 741-102-1000
RV1 RES,SEMIFIXED,10KB RH0651C100103 901-002-0103
RV2 POT,ROTARY, 1K, 3DIAMM,SMD 901-001-0102
RV3 RES,SEMIFIXED,10KB RH0651C100103 901-002-0103
RV4 POT,ROTARY, 1K, 3DIAMM,SMD 901-001-0102
T1 COIL,IFT,SMD,455KHZQUAD 353-012-0001
T2 TRANSFORMERSCHIP 617PT-1019 840-010-0002
T3 TRANSFORMERSCHIP 617PT-1019 840-010-0002
TH1 THERM,33K,NTCCS32163SH333KC 700-050-0002
VR3 P OT,2 0K, RK 097 111120 KA 90 1-00 2-0 20 3
X1 CRYSTAL,44.645M-3015PM,32P,RX 3RD,HC-45 168-044-6450
XF1 FILTER,CRYSTAL,KFN1045AA(45.1M) (BMO-U) 310-030-0015

Page -33­May 2001

MAXON
SP-300 HAND HELD

SP-300 SERIES UHF RF SECTION PARTS LIST

REF # DESCRIPTION PART #

REPLACEMENT MODULES

FRONT ENDASSY, UHF (SEE NOTE 1) 650-110-0013

VCOTX/RX ASSY, UHF (SEE NOTE 1) 650-030-0020

POWERAMPASSY, UHF (SEE NOTE 1) 650-230-0013

COMPONENTS

C1 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471

C2 CAP,TA,10UF,293D106X06R3A2T6.3V 102-013-0106

C3 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471

C4 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471

C5 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471

C6 CAP,TA,4.7UF,20%,10V,3216 102-023-0475

C7 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471

C8 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471

C9 CAP,CER,0.01UF,10%,50V,X7R,0805 100-621-2103

C11 CAP,CER,0.1UF,+80-20%,25V,Y5V,0603 100-813-1104

C12 CAP,TA,10UF,293D106X06R3A2T6.3V 102-013-0106

C13 CAP,CER,0.01UF,5%,50V,X7R,0603 100-521-1103

C14 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471

C15 CAP,CER,0.1UF,+80-20%,25V,Y5V,0603 100-813-1104

C16 CAP,CER,2PF,.25%,50V,COG,0603 100-020-1020

C17 CAP,CER,0.1UF,+80-20%,25V,Y5V,0603 100-813-1104

C18 CAP,CER,0.001UF,10%,50V,X7R,0603 100-621-1102

C19 CAP,CER,220PF,5%,50V,COG,0603 100-520-1221

C20 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471

C21 CAP,METAL,POLY,0.33UF,63VBOX 083-013-2334

C22 CAP,METAL,POLY,.022UF,63VBOX 083-013-2223

C23 CAP,MYLAR,.01UF,63VKBOXTYPE 083-014-2103

C24 CAP,MYLAR,.01UF,63VKBOXTYPE 083-014-2103

C25 CAP,CER,1UF,+80-20%,16V,Y5V,0805 100-803-2105

C26 CAP,CER,0.1UF,+80-20%,25V,Y5V,0603 100-813-1104

C34 CAP,CER,220PF,5%,50V,COG,0603 100-520-1221

C35 CAP,CER,220PF,5%,50V,COG,0603 100-520-1221

C36 CAP,CER,7PF,0.5PF,50V,COG,0805 100-110-2070

C37 CAP,CER,5.6PF,.25PF,50V,COG,0603 100-020-15R6

C38 CAP,CER,15PF,5%,50V,COG,0805 100-520-2150

C39 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471

C41 CAP,CER,6PF,0.5PF,50V,COG,0805 100-120-2060

C42 CAP,CER,27PF,5%,50V,COG,0805 100-520-2270

C43 CAP,CER,5PF,.25PF,50V,COG,0603 100-020-1050

C44 CAP,TA,4.7UF,20%,10V,3216 102-023-0475

C45 CAP,CER,220PF,5%,50V,COG,0603 100-520-1221

C46 CAP,CER,3PF,.25PF,50V,COG,0603 100-020-1030

C47 CAP,CER,220PF,5%,50V,COG,0603 100-520-1221

C49 CAP,CER,2PF,0.25PF%,50V,COG,0805 100-020-2020

C50 CAP,CER,12PF,5%,50V,COG,0603 100-520-1120

C51 CAP,CER,6PF,.25PF,50V,COG,0603 100-020-1060

C53 CAP,CER,1UF,+80-20%,16V,Y5V,0805 100-803-2105

C54 CAP,CER,220PF,5%,50V,COG,0603 100-520-1221

C55 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471

C56 CAP,CER,12PF,5%,50V,COG,0603 100-520-1120

NOTES:

1. Components are not available,assembly is non-repairable.

REF # DESCRIPTION PART #

C57 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C58 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C59 CAP,CER,0.47UF GRM40Y5V474Z16VPT 100-803-2474
C60 CAP,TA,4.7UF,20%,10V,3216 102-023-0475
C61 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C62 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C63 CAP,CER,0.01UF,5%,50V,X7R,0603 100-521-1103
C64 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C65 CAP,TA,10UF,20%,10V,B,3528 102-023-1106
C66 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C67 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C68 CAP,CER,27PF,5%,50V,COG,0805 100-520-2270
C70 CAP,CER,1UF,+80-20%,16V,Y5V,0805 100-803-2105
C73 CAP,CER,3PF,0.25PF,50V,COG,0805 100-020-2030
C74 CAP,CER,8PF,.25PF%,COG,50V,0805 100-120-2080
C75 CAP,CER,4.7PF GRM40COG4R7C50VPT 100-120-24R7
C77 CAP,CER,470PF,10%,50V,X7R,0805 100-621-2471
C78 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C79 CAP,CER,0.1UF,10%,25V,X7R,0805 100-611-2104
C81 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C82 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C83 CAP,CER,12PF,5%,50V,COG,0603 100-520-1120
C84 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C86 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C87 CAP,CER,22PF,5%,50V,COG,0603 100-520-1220
C88 CAP,CER,0.1UF,+80-20%,25V,Y5V,0603 100-813-1104
C90 CAP,CER,7PF,.5PF,50V,COG,0603 100-120-1070
C92 CAP,CER,30PF,5%,50V,COG,0603 100-520-1300
C93 CAP,CER,82PF,5%,COG,50V,0603 100-520-1820
C94 CAP,CER,1UF,+80-20%,16V,Y5V,0805 100-803-2105
C95 CAP,TA,4.7UF,20%,10V,3216 102-023-0475
C96 CAP,CER,0.01UF,5%,50V,X7R,0603 100-521-1103
C97 CAP,CER,30PF,5%,50V,COG,0603 100-520-1300
C98 CAP,CER,0.001UF,10%,50V,X7R,0603 100-621-1102
C102 CAP,CER,0.1UF,10%,25V,X7R,0805 100-611-2104
C103 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C104 CAP,CER,0.001UF,10%,50V,X7R,0603 100-621-1102
C105 CAP,CER,47PF,5%,50V,COG,0603 100-520-1470
C106 CAP,CER,0.01UF,5%,50V,X7R,0603 100-521-1103
C107 CAP,CER,10PF,.5%,50V,COG,0603 100-120-1100
C108 CAP,CER,.0015UF,GRM39X7R152K50VPT 100-621-1151
C109 CAP,CER,470PF,10%,50V,X7R,0603 100-621-1471
C111 CAP,CER,0.1UF,10%,25V,X7R,0805 100-611-2104
C112 CAP,CER,0.033UF,10%,16V,X7R,0603 100-601-1333
C113 CAP,CER,0.1UF,10%,25V,X7R,0805 100-611-2104
C114 CAP,CER,0.01UF,5%,50V,X7R,0603 100-521-1103
C115 CAP,CER,220PF,5%,50V,COG,0603 100-520-1221
C116 CAP,CER,0.01UF,5%,50V,X7R,0603 100-521-1103
C117 CAP,CER,47PF,5%,50V,COG,0603 100-520-1470
C118 CAP,CER,33PF,5%,50V,COG,0603 100-520-1330
C121 CAP,CER,20PF,5%,50V,COG,0603 100-520-1200
C122 CAP,CER,0.001UF,10%,50V,X7R,0603 100-621-1102
C123 CAP,CER,0.01UF,5%,50V,X7R,0603 100-521-1103
C124 CAP,CER,0.1UF,10%,25V,X7R,0805 100-611-2104
C125 CAP,CER,0.1UF,10%,25V,X7R,0805 100-611-2104
C126 CAP,CER,0.01UF,5%,50V,X7R,0603 100-521-1103

Page -34­May 2001

MAXON

SP-300 HAND HELD

REF # DESCRIPTION PART #
C127 CAP, CER, 0.01UF,5%,50V,X7R,0603 100-521-1103
C128 CAP, TA, 4.7UF,20%,10V,3216 102-023-0475
C129 CAP, ELE,10UF,16V 20% 3X5 5.0PT 081-032-3106
C131 CAP, CER, 0.01UF,5%,50V,X7R,0603 100-521-1103
C132 CAP, TA,4.7UF,20V,3528:293D475X0020B2T 20V 102-043-1475
C133 CAP,TA,1.0UF,20%,16V,3216 102-033-0105
C134 CAP, CER,.047UF,0603, 100-813-1473
C135 CAP, TA,10UF, 293D106X0004A2T4V 102-003-0106
C136 CAP, TA, 100UF, 20%, 6.3V, D 102-013-3107
C137 CAP, CER,470PF,10%,50V,X7R,0603 100-621-1471
C145 CAP, CER,470PF,10%,50V,X7R,0603 100-621-1471
C146 CAP, CER,220PF,5%,50V,COG,0603 100-520-1221
C901 CAP, CER, 0.01UF,5%,50V,X7R,0603 100-521-1103
C902 CAP, CER, 0.01UF,5%,50V,X7R,0603 100-521-1103
C903 CAP, CER, 0.01UF,5%,50V,X7R,0603 100-521-1103
C904 CAP, CER, 0.01UF,5%,50V,X7R,0603 100-521-1103
C905 CAP, CER,18PF,5%,50V,COG,0603 100-520-1180
C906 CAP, CER,18PF,5%,50V,COG,0603 100-520-1180
C907 CAP, CER,0.1UF,+80-20%,25V,Y5V,0603 100-813-1104
C908 CAP, CER,33PF,5%,50V,COG,0603 100-520-1330
C910 CAP, CER, 0.01UF,5%,50V,X7R,0603 100-521-1103
C911 CAP, CER, 0.01UF,5%,50V,X7R,0603 100-521-1103
CF1 FILTER, CER,CFW455F,455KHZ 310-010-0010
CF2 FILTER, CER,CFW455HT,455KHZ 310-101-0009
D1 DIODE,SW,KDS181S,SOT-23 220-010-0004
D5 DIODE,PIN,UPP9401,NEEDPKG SIZE 220-020-0001
D6 DIODE,PIN,UPP9401,NEEDPKG SIZE 220-020-0001
D8 DIODE,SW,KDS193,SOT-23 220-010-0003
D9 DIODE,SCHOTTKY,CHIP,HSMS-2817#L31 220-040-0009
D11 DIODE,SW,KDS193,SOT-23 220-010-0003
D12 DIODE,SW,KDS193,SOT-23 220-010-0003
D13 DIODE,SW,KDS181S,SOT-23 220-010-0004
D14 DIODE,SW,KDS181S,SOT-23 220-010-0004
D15 DIODE, CHIP,SM4004,400V,1A,SMD 220-030-0003
D17 DIODE,SCHOTTKY,CHIP,PRLL5817,SOD87 220-040-0008
D18 DIODE,KDS160 220-010-0017
D20 DIODE,KDS160 220-010-0017
D901 DIODE,SW,KDS226,SOT-23 220-010-0005
D902 DIODE,SW,KDS226,SOT-23 220-010-0005
IC1 IC,VREG,TK11450M,+5V,SOT-23L,(R5) 441-010-0002
IC2 IC,PLL,MC145191FR2,SO-20,RS-440 440-050-0011
IC5 IC,VHFRCVR,MC3371D,SO-16,NWRBAND 441-060-0007
L1 COIL,CHIP,18NH,20%,LL2012-F18NM 371-010-5180
L2 COIL,CHIP,18NH,20%,LL2012-F18NM 371-010-5180
L3 COIL,0.1UH:NL252018T-R10J 371-804-3R10
L4 COIL,CHIP,18NH,20%,LL2012-F18NM 371-010-5180
L5 COIL,CHIP,18NH,20%,LL2012-F18NM 371-010-5180
L6 COILCHIP,0.82UH:NL252018T-R82J 371-804-3R82
L7 COILSPRING, 2X0.75X3T:LSMD 350-000-0103
L8 COILSPRING, 2X0.75X3T:LSMD 350-000-0103
L11 COILSPRING, 2X0.75X3T:LSMD 350-000-0103
L12 COIL,1.2UH:NL252018T-1R2J 371-004-31R2
L13 COILSPRING, 2X0.75X3T:LSMD 350-000-0103
L14 COILCHIP,0.47UH:NL252018T-R47J 371-804-3R47

REF # DESCRIPTION PART #
L15 COILCHIP,0.15UH:NL252018T-R15J 371-004-3R15
L16 COIL,CHIP, 1000U,300SS-102K=CP3 370-013-4102
L17 COIL,CHIP, 1000U,300SS-102K=CP3 370-013-4102
L18 COIL,CHIP, 1.0UH:NL252018T-1R0J 371-017-3102
L19 COILCHIP,10UH:LER015T100K 371-005-3103
Q1 TRANS,BRT,PNP,KRA102SPB,SOT-23,SW,(PB) 870-010-0007
Q2 TRANS,BRT,PNP,KRA110SPK,SOT-23,SW,PK 870-010-0010
Q3 TRANS,BRT,PNP,KRA110SPK,SOT-23,SW,PK 870-010-0010
Q4 TRANS,BRT,PNP,KRA110SPK,SOT-23,SW,PK 870-010-0010
Q5 TRANS,KRA104S,SOT-23 870-010-0005
Q6 TRANS,NPN,KTC3875(BL),SOT-23,SW,(ALL) 870-200-0006
Q7 TRANS,PNP,KTA1504(Y),SOT-23,SW 870-100-0004
Q8 TRANS,PNP,KTA1504(Y),SOT-23,SW 870-100-0004
Q11 TRANS,NPN,KTC3875(BL),SOT-23,SW,(ALL) 870-200-0006
Q12 TRANS,NPN,BFR92A,SOT-23,RFAMP,(P2P) 870-200-0020
Q13 TRANS,NPN,KTC3875(BL),SOT-23,SW,(ALL) 870-200-0006
Q14 TRANS,NPN,KTC3875(BL),SOT-23,SW,(ALL) 870-200-0006
Q16 TRANS,NPN,BFR92A,SOT-23,RFAMP,(P2P) 870-200-0020
Q17 TRANS,900MHZ AMP,MMBR951,SOT-23 870-200-0026
Q18 TRANS,BRT,NPN,KRC104S,SOT-23,SW,ND 870-020-0001
Q19 TRANS,NPN,KTC3875(BL),SOT-23,SW,(ALL) 870-200-0006
Q21 TRANS,NPN,KTC3875(BL),SOT-23,SW,(ALL) 870-200-0006
Q22 TRANS,PNP,KTA1663(Y),SOT-89,HC/SW,(HY) 870-150-0002
Q23 TRANS,BRT,NPN,KRC104S,SOT-23,SW,ND 870-020-0001
Q24 TRANS,BRT,NPN,KRC104S,SOT-23,SW,ND 870-020-0001
Q25 TRANS,NPN,BFR92A,SOT-23,RFAMP,(P2P) 870-200-0020
Q26 TRANS,NPN,KTC3875(BL),SOT-23,SW,(ALL) 870-200-0006
Q27 TRANS,NPN,KTC3875(BL),SOT-23,SW,(ALL) 870-200-0006
Q28 TRANS,BRT,NPN,KRC104S,SOT-23,SW,ND 870-020-0001
Q31 TRANS,BRT,NPN,KRC104S,SOT-23,SW,ND 870-020-0001
Q32 TRANS,BRT,NPN,KRC104S,SOT-23,SW,ND 870-020-0001
Q33 TRANS,PNP,KTA1504(Y),SOT-23,SW 870-100-0004
Q34 TRANS,BRT,NPN,KRC104S,SOT-23,SW,ND 870-020-0001
Q901 TRANS,NPN,KTC4075,UMT3 870-200-0031
Q902 TRANS,KTA2014,MAX-900K 870-100-0018
Q903 TRANS,NPN,KTC4075,UMT3 870-200-0031
Q904 TRANS,NPN,KTC4075,UMT3 870-200-0031
Q905 TRANS,NPN,KTC4075,UMT3 870-200-0031
R1 RES,TF,10K,5%,1/16W, +/-200,0603 741-102-1103
R2 RES,TF,100K,5%,1/16W,+/-200,0603 741-102-1104
R3 RES,TF,2.2K,5%,1/16W,TC250,0603 741-102-1222
R4 RES,1.8K,1/16W,5%,T 1608 741-102-1182
R5 RES,1.8K,1/16W,5%,T 1608 741-102-1182
R6 RES,TF,2K, 1/16W,5%,T 1608 741-102-1202
R7 RES,1.8K,1/16W,5%,T 1608 741-102-1182
R8 RES,910,1/10W,5%,T 2012 741-117-2911
R11 RES,TF,100,5%,1/16W,TC250,0603 741-107-1101
R12 RES,5.6K,1/16W,5%,T 1608 741-102-1562
R13 RES,TF,2.7K,5%,1/16W,+/-200,0603 741-102-1272
R14 RES,TF,2.7K,5%,1/16W,+/-200,0603 741-102-1272
R15 RES,TF,100,5%,1/16W,TC250,0603 741-107-1101
R16 RES,910,1/10W,5%,T 2012 741-117-2911
R17 RES,TF,12K,5%,1/16W, +/-200,0603 741-102-1123
R18 RES,TF,10K,5%,1/16W, +/-200,0603 741-102-1103
R21 RES,33,1/16W5%T 1608 741-102-1330
R22 RES,TF,4.7K,5%,1/16W,TC250,0603 741-107-1472
R23 RES,TF,100,5%,1/16W,TC250,0603 741-107-1101
R24 RES,5.6K,1/16W,5%,T 1608 741-102-1562

Page -35­May 2001

MAXON
SP-300 HAND HELD

REF # DESCRIPTION PART #
R25 RES,TF,4.7K,5%,1/16W,TC250,0603 741-107-1472
R26 RES,TF,18,1/16W, 5%,T 1608 741-102-1180
R27 RES,TF,4.7K,5%,1/16W,TC250,0603 741-107-1472
R28 RES,TF,220,1/16W,5%,T 1608 741-102-1221
R31 RES,TF,300,1/16W,5%,T 1608 741-102-1301
R32 RES,TF,300,1/16W,5%,T 1608 741-102-1301
R33 RES,TF,6.8K,5%,1/16W,+/-200,0603 741-102-1682
R34 RES,TF,18,1/16W, 5%,T 1608 741-102-1180
R35 RES,5.6K,1/16W,5%,T 1608 741-102-1562
R37 RES,1.2K 1/16W5%T1608 741-102-1122
R41 RES,TF,22,1/16W,5%,T 1608 741-102-1220
R42 RES,TF,12K,5%,1/16W, +/-200,0603 741-102-1123
R43 RES,TF,10K,5%,1/16W, +/-200,0603 741-102-1103
R45 RES,TF,22K,5%,1/16W,TC250,0603 741-107-1223
R47 RES,TF,2.2,5%,1/10W,TC250,0805 741-117-2229
R48 RES,TF,2.2,5%,1/10W,TC250,0805 741-117-2229
R50 RES,TF,1M,5%,1/16W,+/-200,0603 741-102-1105
R51 RES,TF,2.2,5%,1/10W,TC250,0805 741-117-2229
R52 RES,TF,3.3K,5%,1/16W,TC250,0603 741-107-1332
R53 RES,TF,10K,5%,1/16W, +/-200,0603 741-102-1103
R54 RES,TF,1K,5%,1/16W,+/-200,0603 741-102-1102
R55 RES,1.2K 1/16W5%T1608 741-102-1122
R56 RES,270 1/16W5%T 1608 741-102-1271
R57 RES,100K 1/16W1%T 1608 740-211-1003
R58 RES,TF,470K,5%,1/16W,TC250,0603 741-107-1474
R59 RES,TF,39,5%,50V,0603 741-102-1390
R61 RES,68K 1/16W1%T1608 740-211-1683
R62 RES,68K 1/16W1%T1608 740-211-1683
R63 RES,150,1/16W,5%,T 1608 741-102-1151
R64 RES,TF,22,1/16W,5%,T 1608 741-102-1220
R65 RES,51,1/16W, 5%,T 1608 741-102-1510
R66 RES,TF,100,5%,1/16W,TC250,0603 741-107-1101
R67 RES,TF,22K,5%,1/16W,TC250,0603 741-107-1223
R68 RES,TF,22K,5%,1/16W,TC250,0603 741-107-1223
R69 RES,TF,470K,5%,1/16W,TC250,0603 741-107-1474
R70 RES,TF,470K,5%,1/16W,TC250,0603 741-107-1474
R71 RES,TF,1K,5%,1/16W,+/-200,0603 741-102-1102
R72 RES,TF,220K,5%,1/16W,TC250,0603 741-107-1224
R74 RES,TF,22K,5%,1/10W,TC250,0805 741-117-2223
R75 RES,TF,47K,5%,1/16W,TC250,0603 741-107-1473
R76 RES,TF,22K,5%,1/16W,TC250,0603 741-107-1223
R77 RES,TF,22K,5%,1/16W,TC250,0603 741-107-1223
R78 RES,TF,2.7K,5%,1/16W,+/-200,0603 741-102-1272
R79 RES,TF,10,5%,1/16W,+/-200,0603 741-102-1100
R81 RES,TF,2.7K,5%,1/16W,+/-200,0603 741-102-1272
R82 RES,TF,10K,5%,1/16W, +/-200,0603 741-102-1103
R83 RES,TF,18K,1/16W5%T 1608 741-102-1183
R84 RES,TF,18K,1/16W5%T 1608 741-102-1183
R85 RES,TF,39K,5%,1/16W,TC250,0603 741-107-1393
R86 RES,TF,1K,5%,1/16W,+/-200,0603 741-102-1102
R87 RES,TF,330K,5%,1/16W,+/-200,0603 741-102-1334
R88 RES,TF,100,5%,1/16W,TC250,0603 741-107-1101
R89 RES,TF,22,1/16W,5%,T 1608 741-102-1220
R91 RES,TF,470,5%,1/16W,TC250,0603 741-107-1471
R92 RES,TF,2.7K,5%,1/16W,+/-200,0603 741-102-1272

REF # DESCRIPTION PART #

R93 RES,TF,100,5%,1/16W,TC250,0603 741-107-1101

R94 RES,TF,1K,5%,1/16W,+/-200,0603 741-102-1102

R95 RES,TF,82K,5%,1/16W,TC250,0603 741-107-1823

R96 RES,TF,39K,5%,1/16W,TC250,0603 741-107-1393

R97 RES,TF,10,5%,1/16W,+/-200,0603 741-102-1100

R98 RES,TF,10K,5%,1/16W, +/-200,0603 741-102-1103

R99 RES,100K 1/16W1%T 1608 740-211-1003

R102 RES,TF,22K,5%,1/16W,TC250,0603 741-107-1223

R103 RES,TF,10K,5%,1/16W, +/-200,0603 741-102-1103

R104 RES,TF,10K,5%,1/16W, +/-200,0603 741-102-1103

R105 RES,TF,22K,5%,1/16W,TC250,0603 741-107-1223

R106 RES,TF,22K,5%,1/16W,TC250,0603 741-107-1223

R108 RES,TF,56K,1/16W,5%,T 1608,0603 741-102-1563

R109 RES,0.1 1W1% 1218 740-521-0R10

R110 RES,270 1/16W5%T 1608 741-102-1271

R111 RES,TF,10K,5%,1/16W, +/-200,0603 741-102-1103

R112 RES,TF,22K,5%,1/16W,TC250,0603 741-107-1223

R113 RES,TF,470K,5%,1/16W,TC250,0603 741-107-1474

R114 RES,TF,100K,5%,1/16W,+/-200,0603 741-102-1104

R115 RES,TF,47,5%,1/16W,50V,T1608,0603 741-102-1470

R116 RES,TF,22K,5%,1/16W,TC250,0603 741-107-1223

R117 RES,TF,22K,5%,1/16W,TC250,0603 741-107-1223

R121 RES,TF,220K,5%,1/16W,TC250,0603 741-107-1224

R122 RES,TF,4.7K,5%,1/16W,TC250,0603 741-107-1472

R125 RES,TF,22,1/16W,5%,T 1608 741-102-1220

R126 RES,TF,10K,5%,1/16W, +/-200,0603 741-102-1103

R128 RES,TF,10K,5%,1/16W, +/-200,0603 741-102-1103

R130 RES,TF,100,5%,1/16W,TC250,0603 741-107-1101

R132 RES,5.6K,1/16W,5%,T 1608 741-102-1562

R901 RES,TF,2.2K,5%,1/16W,TC250,0603 741-102-1222

R902 RES,TF,2.2K,5%,1/16W,TC250,0603 741-102-1222

R903 RES,TF,4.7K,5%,1/16W,TC250,0603 741-107-1472

R904 RES,TF,7.5K,5%,1/16W,50V,T1608,0603 741-102-1752

R905 RES,TF,27K,5%,1/16W,TC250,0603 741-107-1273

R906 RES,TF,7.5K,5%,1/16W,50V,T1608,0603 741-102-1752

R907 RES,TF,27K,5%,1/16W,TC250,0603 741-107-1273

R908 RES,TF,10,5%,1/16W,+/-200,0603 741-102-1100

R909 RES,TF,470,5%,1/16W,TC250,0603 741-107-1471

RLK2 RES,TF,0,5%,1/16W,TC250,0603 741-107-1000

RLK3 RES,TF,0,5%,1/16W,TC250,0603 741-107-1000

RLK4 RES,TF,0,5%,1/16W,TC250,0603 741-107-1000

RLK5 RES,TF,0,5%,1/16W,TC250,0603 741-107-1000

RLK7 RES,TF,0,5%,1/16W,TC250,0603 741-107-1000

RLK12 RES,TF,0,5%,1/16W,TC250,0603 741-107-1000

RLK16 RES,TF,0,5%,1/16W,TC250,0603 741-107-1000

RLK36 RES,TF,0,5%,1/16W,TC250,0603 741-107-1000

RLK49 RES,TF,0,5%,1/16W,TC250,0603 741-107-1000

RLK123 RES,TF,0,5%,1/16W,TC250,0603 741-107-1000

RLK488 RES,TF,0,5%,1/16W,TC250,0603 741-107-1000

RV1 RES,SEMIFIXED,10KB RH0651C100103 901-002-0103

RV2 POT,ROTARY, 1K, 3DIAMM,SMD 901-001-0102

RV3 RES,SEMIFIXED,10KB RH0651C100103 901-002-0103

RV4 POT,ROTARY, 1K, 3DIAMM,SMD 901-001-0102

RV5 RES,SEMIFIXED,10KB RH0651C100103 901-002-0103
T1 COIL,IFT,SMD,455KHZQUAD 353-012-0001
T2 TRANSFORMERSCHIP 617PT-1019 840-010-0002
T3 TRANSFORMERSCHIP 617PT-1019 840-010-0002

Page -36­May 2001

REF# DESCRIPTION PART#

TCXO TCXO, KXN1343A,12.8M,2.0PPM 150-000-0003
TH1 THERM,33K,NTCCS32163SH333KC 700-050-0002
U3 IC, OP AMP,LM358M,SO-8,DUAL OP AMP 441-030-0006
U6 IC, AUDIO AMP,LM386M-1,0.33W,SO-8 441-040-0002
U8 IC, OP AMP,LM358M,SO-8,DUAL OP AMP 441-030-0006
VR3 POT, 20K,RK0971111 20KA 901-002-0203
X1 CRYSTAL, 44.645M -30 15PM,32P,RX 3RD,HC-45 168-044-6450
XF1 FILTER, CRYSTAL,KFN1045AA(45.1M) (BMO-U) 310-030-0015

MAXON

SP-300 HAND HELD

Page -37­May 2001

MAXON
SP-300 HAND HELD

COMPONENT PINOUT

BASE DIAGRAM

C

E

B

3

2

1

MANUFACTURER'S

PART NUMBER

REFERENCE NO. SCHEMATIC

Q202,203,302,303,6012SC5084

MMBR951 Q16,17,501,601

BFR92A Q12,16,25

KTC3875S (BL) Q6,11,13,14,21,26,27

Q7,8,33KTA1504SY

KRC104S (ND)

Q18,23,24,28,31,32,34,403,

Q404,405,411,413

KRA104S (PD) Q5,410,412

KRA101S (PA) Q406,407

KRA110S (NK) Q2,3,4,401,416

KRA102S (PB)

MMBZ5232B

Q1

D405, 406, 407

C

B

E

C

B

E

47K

47K

10K

C

E
C

E

C

E

C

E

47K

B

47K

B

4.7K

B

10K

B

KDS181 (A3) D1,13,14,401,402,501

KDS193 (F3) D8,11,12,403

1

3

2

KDS226 (C3) D601,901,902

D404KDS184 (B3)

UPP9401

D5,6

Page -38­May 2001

MAXON

SP-300 HAND HELD

BASE DIAGRAM

5

8

1

1.BASE

2.COLLECTOR

3

2

1

3.EMITTER

3

2

1

1.EMITTER

2.BASE

3.EMITTER

4.COLLECTOR

4

MANUFACTURER'S

PART NUMBER

REFERENCE NO. SCHEMATIC

54

4

ND433G

D9

6

7
8

KTA1663

BLT50

Q22

Q502

B

B

3

2
1

C

E

C

E

1

2

3

4

60

61

8

7

6

5

K

41

80

1,4,5,8:EMITTER

2,3:BASE

6,7:COLLECTOR

A

40

21

20

1

BLT52

1SV229

SM4004

HD4074818

Q503

D201,202,301

D15

IC409

CPU IC

Page -39­May 2001

MAXON
SP-300 HAND HELD

RF Power Amp

RX Front-End

GND

BASE DIAGRAM

4

3

2

1

GND

GND

7

6

5

(VHF) P.A. Assy. P/N: 650-230-0012
(UHF) P.A. Assy. P/N: 650-230-0013

1

2

4

No Description

1

Input

2

GND

3

Vcc (Pre Drive)

4

Vcc Control (Drive)

5

Vcc (Final)

6

Output

7

GND

Input1

2

GND

+

4

B (4V)

5

GND

6

Output

PIN DESCRIPTION

RX/TX VCO

8

9

10

TOP SIDE

65

7

13

1211

12.8 MHz TCXO

2

5

6

(VHF) Front-End Assy. P/N: 650-110-0012
(UHF) Front-End Assy. P/N: 650-110-0013

Gnd

1

1

1

1

3

4

R309

14

(VHF) V.C.O. Assy. P/N: 650-030-0021
(UHF) V.C.O. Assy. P/N: 650-030-0020

1

4

3

1615

21

18

17

RX Out

2

2

2

2

3

3

3

3

Gnd

RX Vcc

4

4

4

4

5

5

5

5

Gnd

6

6

6

6

TX Out

7

7

7

7

Gnd

TX Vcc

8

8

8

8

1 Modulation

2

GND

3

Out

4

Vcc (5V)

9

10

11

12

13

14

15

16

Gnd

Gnd

Gnd

Gnd

TX Mod

Gnd

Tuning

Gnd

17

18

Gnd

Gnd

(VHF ONLY) TCXO Assy. P/N: 650-100-0002

Page -40­May 2001

43

C605

6

C601
680pF

C602

39pF

L601

6T

C604

100pF

C603

56pF

0.001

L602

6T

C606
120pF

R601

180

L603

6T

C607

39pF

Q601

MMBR951

R604

2.2

R602

6.8K

C608

33pF

R605

3.3K

R603
820

C612

47pF

C611
100pF

L604

6T

D601

KDS226

C613

39pF

C614
120pF

C615

N/F

L605

6T

C616

9pF

L606

6T

5

SCHEMATICS & BLOCK DIAGRAM

6

OUT

C617

47P

C618

N/F

C621

100pF

L607

6T

C623
39pF

C622

0.01uF

1

5

GND

C623

22P

L6074TC620

2

C621

C622

18P

33P

N/F

C619

C618

6P

L606

4T

6P

7P

C617

L605

4P

4T

7P

C614

3.3P

5.6P

C613

C615

C616

C624

RX 5V

4

R601
56K

C602

C603

C605

C606

C608

24P

C609

18P

L603
4T

9P

C607

16P

7P

L602

4T

9P

C604
20P

L601

11P

IN

1

GND

C601

4T

10P

2

Q601

2SC5084

D601

KDS226

C610
33P

R602
100

L604

4T

4P

C612
470P

Notes:

1. ALL VALUES ARE IN OHMS,
MICROHENRIES OR MICROFAR­ADS UNLESS OTHERWISE SPECI­FIED.

2. ALL RESISTORS ARE 1/10W 5%
UNLESS OTHERWISE SPECIFIED.

R501

2.7K
Q501

C501

3P

MMBR951

C502

39P

1

C504

R502

8.2K

L501
56NH

18P

C503

0.01

L502
27NH

C509

12P

L503

150NH

R503

200

R510
0

Q502

BLT50

2

R506
22

3

Notes:

1. ALL VALUES ARE IN OHMS,
MICROHENRIES OR MICROFAR­ADS UNLESS OTHERWISE SPECI­FIED.

2. ALL RESISTORS ARE 1/10W 5%
UNLESS OTHERWISE SPECIFIED.

VHF FRONT-END

(148-174MHz Band Shown)
Schematic P/N: 770-110-0012 Rev. C
PCB Assy. P/N: 650-110-0012 Rev C

R509

56

C506

0.01

C505

L504

8T

39P

L506

2.2uH

4T

C507

47P

L505

Q503

BLT52

C508

N/F

R505
33

VHF POWER AMP

(148-174MHz Band Shown)

Schematic P/N: 770-230-0012 Rev. A
PCB Assy. P/N: 650-230-0012 Rev. A

R507

82

L509

C515

L507

R508

82

C517

22P

4T

8T

L508

5T

C513

82P

0.01

6

C514

24P

C501

1

R502

8.2K

2

C512

0.01

7

54

22P

Notes:

1. ALL VALUES ARE IN OHMS,
MICROHENRIES OR MICROFAR­ADS UNLESS OTHERWISE SPECI­FIED.

2. ALL RESISTORS ARE 1/10W 5%
UNLESS OTHERWISE SPECIFIED.

R501

2.7K
Q501

MMBR951

L501

4T

R503

6.8

C502
8P

C503

220P

C504

7P

3

Notes:

1. ALL VALUES ARE IN OHMS,
MICROHENRIES OR MICROFAR­ADS UNLESS OTHERWISE SPECI­FIED.

2. ALL RESISTORS ARE 1/10W 5%
UNLESS OTHERWISE SPECIFIED.

R506

22

D501

KDS181

L502

1.2UH

C500
220P

Q502

BLT50

R504

2.2K

L503

7T

UHF FRONT-END

(440-470MHz Band Shown)

Schematic P/N: 770-110-0013 Rev. D

PCB Assy. P/N: 650-110-0013 Rev. D

L504

C507

22P

1.2UH

C508

11P

C505

20P

C506

220P

4

R505
33

C509

N/F

C511

0.001

UHF POWER AMP

(440-470MHz Band Shown)

Schematic P/N: 770-230-0013 Rev. B

PCB Assy. P/N: 650-230-0013 Rev. B

Q503

BLT52

C515
43P

6

L505

7T

C513

4P

C512

220P

C514

15P

L506

N/F

7

5

ote: Schematics are for reference only. Based on band selection, reference designators and part val-

zN

ues may differ from schematics shown.

PAGE -41-

May 2001

12

11

10

13

14

MOD

97

VCO TX

R206

100

L201

1.2uH

C201

0.001

D201

1SV217

C203

1.2P

C204

1.2P

C202

18P

R202
100K

C205

1.2P

D202

1SV217

C206

2.7P

R201
100K

C212

0.001

C208

4.7P

L203

4.5t

R204

2.2K

R205

2.2K

R203

4.7K

C215

0.001

C213

4.7P

C214

13P

L204

2.2UH

L205

180nH

Q203
2SC5084

Q202

2SC5084

R207

220

C216

0.001

C211

13P

VCC

C217

4P

OUT

97

C216
220P

C211

7P

VCC

C217

4P

OUT

8

6

5

8

12

C212

10

VCO TX

220P

R205

2.2K

L205
33nH

11

L204

820NH

Q203

2SC5084
(MCO)

(MCO)

Q202

2SC5084

R207

270

6

C213

R203

4.7K

C215

0.001

C214

10P

3P

R204

R206
100

L201

100nH

MOD

13

C201
470P

D201

5

14

1SV229

(T8)

C202

10P

C203

0.75P

C204

1.5P

R202
100K

C205

0.5P

D202

1SV229

(T8)

C206

L202

470nH

5P

2.2K

C208

4P

L203

1.2t

16

3

15

17

18

TUNING

R306
100

C301

0.001

L301

1.2uH

1SV217

D301

VCO R X

C312

0.001

R304

2.2K

L303

4.5T

C308

2.2P

C302

11P

C306

0.5P

VHF V.C.O.

(148-174MHz Band Shown)

Schematic P/N: 770-030-0021 Rev. B

PCB Assy. P/N: 650-030-0021Rev. B

R305

2.2K

R303

4.7K

C315

0.001

C313

C314

12P

VCC

4

L305

100nH

4P

L304

2.2uH

R307

220

C317

4P

Q303

2SC5084

Q302

2SC5084

C311

16P

C316

0.001

OUT

2

1

Notes:

1. ALL VALUES ARE IN OHMS,
MICROHENRIES OR MICROFAR­ADS UNLESS OTHERWISE SPECI­FIED.

2. ALL RESISTORS ARE 1/10W 5%
UNLESS OTHERWISE SPECIFIED.

16

3

15

17

18

VCO RX

TUNING

R306

100

L301

100nH

C301
220P

D301

1SV229

(T8)

C302

13P

C312
220P

R304

2.2K

C308

4P

C306

9P

L303

1.2t

UHF V.C.O.

R305

2.2K

R303

4.7K

C314

10P

C313

3P

R309

OR

R307

270

L305
33nH

Q303

2SC5084

(MCO)

(MCO)

Q302

2SC5084

C311

C317

4P

7P

VCC

OUT

C316

220P

4

2

1

(440-470MHz Band Shown)

Schematic P/N: 770-030-0018 Rev. D

PCB Assy. P/N: 650-030-0020 Rev. A

PAGE -42­May 2001

R706

47K

D702

MMBV109

C702
100pF

12.8MHz

R707

47K

TC701

20pF

R708

47K

X701

R709

39K

C703

91pF

R710

2.2K

R711

4.7K

C705

100pF

Q701
MMBR9426

C704
180pF

R713

47K

R712

39K

R715

2.2K

R714

2.2K

Q702

MMBR9426

C706
220pF

4

CON1

+

-

3

R703

*

TH702

R704

33K

TH703

150K

*

LK701

D701
MMBV

105

R705

47K

C701

100pF

TH701

10K

2

R702

*

R701

*

1

TCXO

Schematic P/N: 770-100-0002 Rev. D
PCB Assy. P/N: 650-100-0002 Rev. D

BATT 7.5V

R1
15K

SW1

SW POLY

TH1
30K

ACC-200 BATTERY

Schematic P/N: 770-210-0010

Shown for reference only

C401

47P

D1

C402
470P

C403

C404

470P

47P

C405

47P

FUSE 4A

C406
470P

CON1

FUSE

Schematic P/N: 770-200-0004 Rev. B

PCB Assy. P/N: 650-200-0004 Rev. B

SW401

MON

(OPTION1)

C410
470PF

CON401
4PIN(M)

PTT

GND

OPT2

OPT1

3

4

SW402

PTT

C411

470PF

2

CON402

4PIN(F)

1

P. T.T.

Schematic P/N: 770-180-0017 Rev. A

PCB Assy. P/N: 480-042-0028

SW403

OPTION2

C412

470PF

Notes:

1. ALL VALUES ARE IN OHMS,
MICROHENRIES OR MICROFAR­ADS UNLESS OTHERWISE SPECI­FIED.

2. ALL RESISTORS ARE 1/10W 5%
UNLESS OTHERWISE SPECIFIED.

PAGE -43-

May 2001

LOCK D/T

PLL EN
CLOCK

TX 5V

RX EN
TX EN

BUSY

DATA

TCXO

MOD

IC401A

MC14066BD

R424

10K

PWR H/L
386 EN

N/S SW

P/S 5V

VOLUME

R481

N/F

LK15 LK14

R9

R9A6868

C462

C463

0.047U(K)

C418

R439

CHARGE

LK6

220P

3K

SPK

LK7

SWB+

Q412

KRA104S

(PD)

R435

R482

N/F

IC410B

KIA324F

6

-

5

+

R440

4.7K

6.8K

R457

22K

C419

220P

R489

4.7K

KRC104S

ST

ST

14

4

7

0.033U(K)

5

C413
470P

ST

R456

22

7.5V

Q413

(ND)

5V

IC402B

MC14066BD

3

R441

3.9K

C464 C465

0.033U(K)

C430

0.1

R490

2.2K

C483
470P

2
3

R442

27K

+

-

4

C421
220P

R702

2SK1579

12K

IC410A

KIA324F

1

Q701

D407

5.6V

R703

12K

+

R704
100K

C136

100/6V

C701

100/6V

C485
470P

ST
C484
470P

Q702

KTC3875

CON406

C420
220P

+

AUDIO

ALERT

R426

IC402D

R408

22K

10K

+

IC405A

LM358

3

2

6

5

5V

8

+

­4

R486

*

18K

-

+

R400

11K

Q416

KRA110S

(PK)

C477
470P

1

7

IC405B
LM358

4

RV401

47KB

3

R422

5

47K

IC401B

MC14066BD

C472

0.001

R459

*

10K

R423

1.2K

RV403

47KB

7

KRA110S

+

C431

4.7/10

Q401

(PK)

R493

22K

IC406B

5

KIA324F

+

6

­R429

27K

5V

D401

KDS181

(A3)

R427
100K

LK2

5V

1
4

1

2

1
3

R401
680K

C405

0.001

R414

C400

0.0068

C478

10/4

LK5

MC14066BD

10

1
2

6

8

7

11

CLOCK

IC402C

MC14066BD

9 DATA

12
13

2
1

5
3

6
11
10
9

R470

30K

IC411

X0
X1

Y0
Y1

Z0
Z1

INH
A
B
C

14053

R425

220K

C435

0.1(K)

R471

X

Y

Z

30K

1.2K

0.022(K)

R472

36K

14

15

4

16

7

8

C436

R428

10K

IC406A

KIA324F

C422

0.01

5V

4

2

-

3

+

IC401C

MC14066BD

R701

2.2K

D701

5.6V

R483

2.2K

R469

2.2K

D406

1

5.6V

D405

5.6V

0.047U(K)

6

8

9

R432

7

4.7K

RELEASED TO MANUFACTURING DGC 5/01

A

MIC1

C-MIC

SP1

2 OHM/1W

REVISIONS

DESCRIPTIONDESCRIPTIONREV

1
2
3
4
5
6
7
8
9

10

11

12

CON701

12 HEADER

1.DATA

2.CLOCK

4.+7.5V

7.GND

8.MIC+

10.INT_SPK_MIC_DSBL

11.SPKR+

Y

HG B

C

DATE

CON404

14 PIN

14

13

12

11

10

9

8

7

6

5

4

3

2

1

PAGE -44­May 2001

4

1

IC404A

KIA324F

R412

22K

C449

0.033(K)

C432

470P

C439

470P

N/C AUDIO OUT

TX TONES

BUSY/SQ

CALL

MONITOR

PTT IN

RX AUDIO IN

ALERT TONE OUT

CALL LED

MIC CONTROL

AUDIO MUTE

TX ENABLE

GND

VCC

7.5V

C433

SWB+

470P

-

+

C441

0.0018

2

3

13

-

12

+

C406

0.1

5V

C425
470P

C415
470P

C428
470P

C442

0.022(K)

R402

8.2K

C448

47P

R403

8.2K

R411

270K

KRA101S

KIA324F

Q406

(PA)

14

IC404D

C447

0.015

Q417

KTA1504S

(ASY)

R410

LK4

Q407

C426
470P

KRC101S

(NA)

C424
470P

C434

0.1

LK8

LK9

R418

560

C414
470P

C416
470P

CON401

PTT SCHEMATIC
P/N:480-042-0028

IC404B

KIA324F

R430
220K

3.3K

KRC104S

Q403

(ND)

7

LK21

LK12

C44

R404

8.2K

C446

10

9

47P

R409

220K

-

+

D403

KDS193

(F3)

R416

10K

1

KIA324F

1

R488

8

IC404C

0

KRC104S

0.01

R406

8.2K

Q411

(ND)

C404

0.047(K)

RV402

22KB

1
2

LK19

Q402

N/F

IC401D

MC14066BD

11 10

R431

47K

R417

2.2K

LK17

R407

N/F

TX5V

SWB+

LK20

LK22

LINK TABLE (0R)

LK1 LK2 LK3 LK5LK4 LK6 LK7 LK8 LK9 LK12

N/F FIT FIT FIT FIT N/F FIT N/F N/F FIT

NORMAL

C476

0.1

1

2

3

4

5

6

7

V
O
S

A
D
J

F

I
N

8

5V

R460

47K

R433

47K

R434

47K

R495

N/F

V

A

V

O

G

C

N

C

1

D

MF6-100

IC407

C
L

C

G

K

L

N

K

D

R

1

1

9

0

1

IC408

1

CS

VCC

2

SK

N.C

3

DI

ORG

4

DO

GND

93C56

5V

R421

R478

200K*

R479

100K*

R480

R454

22K

8

7

6

5

51K*

47K

N

V

F

.

O

I

O

N

2

U

V

T

2

L

I

I
.
S
H

1
2

R473

N

N

V

V

43KR

1

2

1

1

3

4

Q410 KRA104S(PD)

C459

0.1
C458

0.1U(K)

8
0

C

R

L

X

K

E

1

N

DATA

2

EEP EN

3

PLL EN

4

ALART

5

DATA IN

6

RED LED

7

BUSY

8

MONITOR

9

LOW BATT

10

EXT

11

TEST

12

X1

13

X2(OPEN)

14

GND

15

ENCODE1

16

ENCODE2

17

PWR H/L

18

ENCODE3

19

CH1

20

CH2

C

C

H

H

4

8

2
1

7
9

2
2

R474
43KR

7
8

G
R
N

N
/
S

S
W

2
3

C454

0.68U

R475

0.0033(K)

47K

C452

0.1U(K)

R464

4.7K

7

7

7

7

7

7

1

2

3

4

5

6

7

G

V

O

O

R

3

N

C

S

S

E

8

D

C

C

C

S

6

1

2

E

IC409

HD4074818P

C
L
O

L

N

C

O

E

M

A

C

F

L

K

T

S

6

L

X

W

F

P

D

C

D

A

T

E

E

E

L

E

S

T

T

N

N

K

T

T

32333435363738394

2

2

2

2

2

2

303

4

5

6

7

8

9

1

360KR

R487

120K

C455

0.082U

C453

+

C423
10/6.3

R476

L410

10UH

C456
120P

R477
120K

C437

1UF

R450

33K

9

­8

10

+

IC406C

1

KIA324F

1

IC406D

5V

KIA324F

13

12

R449

20K

R485
220K

-

14

+

5V

LK18

D404

KDS184

R484

4.7K

60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41

R461

1M

X401

3.579545MHz

616263646566676869707

0

C460

15P

C461

LK16

15P

0.033U

Q404

KRC104S

(ND)

GRN

C466

(K)

C427

0.001

R100
470R

R443

C467

0.033U
(K)

LED1

2.4K

C474

1UF

SWB+

IC410D

KIA324F

13

12

R444

82K

R200

1.2K

Q405

KRC104S

(ND)

RED

IC410C

R446

KIA324F

820

9

-

14

C468

0.033U

C469

0.047U
(K)

(K)

R447

220K

-

+

10

C471

0.1(K)

8

+

1

R451

1

10K

R452

2.2K

C470

1UF

R453

1M

CH404

BCD ENCODE SW

4/16CH

TITLE

SP-300 Series

Digital Schematic Diagram

DOCUMENT
NUMBER

SCALE

NA

SHEET

OF

1

SIZE

B

1

LK14 LK15 LK16 LK17 LK18 LK19 LK20

N/F N/F FIT N/F N/F N/F N/F

LK21 LK22

N/F N/F

VHF/UHF TABLE

R486 R459

VHF

33K

UHF

18K

1.2K

10K

R493

R478 R479 R480

22K

22K

200K 100K 51K

39K 20K 10K

C481
470P

C482
470P

C480
470P

C479
470P

6

­5

+

C443

0.0047

R405
100K

LK3

C438
470P

5V

R415

47K

D402

KDS181

(A3)

LK1

Digital Schematic

12

13

MOD

R43
10K

11

MOD

C57
470P

14

16

15

C19

470P

17

18

C907

0.1
D901

KDS226

D902

KDS226

C902

C901

0.01

0.01

DATA

CLOCK

PLL EN

5V

R125

22

43

TCXO (VHF)

0.01

C13

12.8MHz

P/N: 650-100-0002

12

TCXO

LOCK D/T

P/S 5V

TX EN

RX EN

TX 5V

BUSY

VCO TX SECTION

P/N: 650-030-0021

VCO RX SECTION

C903

Q901

0.01
KTC4075

C908

33P

Q902

C904

KTA2014

0.01

R130

100

R2

100K

Q5

KRA104S

(PD)

C8

470P

(VHF)

R901

2.2K

Q903

KTC4075

C15

0.1

C11

0.1

R902

R903

4.7K

KRA110S

(PK)

5V

L19

10uH

R1
10K

2.2K

Q4

+

10/6.3

C910

0.01

C16
2P

C12

R904

7.5K

Q904

KTC4075

20

19

18

17

16

15

14

13

12

11

C20

470P

R905

27K

IC2

OSI

DT

CK

EN

O/A

O/B

VDD

TST2

VCC

FIN

MC145191F

C906

18P

C1

0.001

C905

C109
470P

18P

TST1

SWB+

OSO

LD

*R

*V

VPD

PD

GND

RX

FIN

TK11450

R906

7.5K
R907

27K

Q905

KTC4075

1

2

3

4

5

6

C17

0.1

7

8

9

10

IC1

POWER SAVE

7

6

5

4

2

1

16V

R3

2.2K

1.8K

R4

R5 1.8K

R6

1.8K

R7

C18

0.001

C2

10/6.3

C9

0.001

Q14
KTC3875S (ALL)

R37

3.3K

C53
1UF

R26
18

C45
10P

PRE OUT

Q13

KTC3875S (ALL)

R25

3.3K

+

R21
100

C34

220P

C911

0.01

R909

470

C26

R17

0.1

12K

2K

Q8

KTA1504S

(ASY)

5V

+

Q1

KRA102S

(PB)

D1

KDS181

(A3)

C46
8P

KDS160

C44

4.7/10(T)

C43

3P

R908

10

KTC3875S

(ALL)

KTC3875S

R8

910

C3

0.001

5V

D20

KDS160

R36
0R

R35

8.2K

R27

4.7K

D18

R22

4.7K

R16
910

Q6

Q11

(ALL)

5V

TX 5V

C54

0.001

MMBC1321

C47
470P

R24

5.6KL31.2uH

R23
120

SWB+

7.5V

R15
100

KTA1504S

R11
100

KRA110S

(PK)

Q16

BFR92A

Q7

(ASY)

R12

3K

C21

0.33
(P)

Q2

R28

56

Q12

(P2)

C5

470P

C35

0.001

TX 5V

5V

L4
100nH

C25
1uF

4.7/10

C39

0.001

C6

C51
10P

R31
300

47nH

C36

14PF

C22

0.022
(P)

C37
33P

2.7K

R34

18

L1

C24

0.01
(P)

R13

+

KRA110S

(PK)

Q3

0.001

R41
100

43PF

C4

0R

(RL2)

C38

TP1

R14

2.7K

C23

0.01
(P)

TX 5V

L2

C50
33P

R32

300

RX 5V

R42
12K

C7

0.001

C42

0.001uF

C41
N/F

R33

3.3K

C55

0.001

L5
100nH

C56

0R

(RC56)

Q17

MMBC1321

C127

0.01

PWR H/L

C69

N/F

TX 5V

R97

10

C128

4.7/10

1

2

R63
150

Q23

KRC104S

(ND)

MIXER

C85

N/F

C96

0.01

C97
33P

R94

1K

++

C94
1uF

L31
N/F

R66

100

C129

10/16

R72

220K

Q25

BFR92A

(P2)

R102

22K

C58

470P

RV3
10K

T3

44.645M

C61

470P

C117

47P

1.2uH

R71

X1

3

C62

470P

ND433G

6

7

8

XF1

45.1M

L12

R67
22K

1K

C98

0.001

L18

1uH

R98 10K

R101

N/F

D13

KDS181S

R45
12K

D9

LK100 N/F

C90

7P

R68
22K

Q24

KRC104S

(ND)

1
6

M

G

I

N

X

D

IC5

I

MC3371

O

O

S

S

C

C

1

2

1

C118

33P

C121

20P

P.A. MODULE(VHF) SCHEMATIC

P/N: 650-030-0012

R79

56

IC3B

LM358

7

0.01

470nH

C93
82P

+

1
1

F
I
L

O

D
C
O
U
P

6

0.01

C124 C125

0.1u(K)

L14

C95

4.7/10

R74

* 22K
15K-27K
R75

47K

CF1

455F

R52

KRC104S

C14

470P

L15

150nH

R87

330K

1
0

F
I
L

I

D
C
O
U
P

7

CF2

455HT

R112

22K

4

C65

10/10

Q18

(ND)

C87
27P

R65

51

C102

0.1u(K)

9

A
F

Q
U
A
D

8

R95
82K

1

2

R47
R48
R51

3.3K

R105

30K

+

C107

2R2
2R2
2R2

C88

0.1

6

OUT

GND

5

R76
22K

R77
22K

10P

T1

3210796

R96
39K

R106

TX B2

R46

2.2K

4 5

3

2

1

R103

10K

C131

0.01

C79

M
U
T
E

M
I
X

O

R104

10K

0.1

KDS193

1
4

3

C122

0.001

(F3)

C64

470P

6

-

5

+

C63

R50
1M

T2

C92
30P

D8

1

1

2

3

S

M

Q

E

I

D
R
V

L
M
T

V
C

I

C

5

4

C123

R49
22R

1
5

2

R111

10K

Q22

KTA1663

(HY)

Q26

KTC3875S

(ALL)

R107

N/F

KDS181S

R53

10K

R54

1K

Q21

KTC3875S

(ALL)

R55

1.5K

R64

22

R78

2.7K

R81

2.7K

R86

D12

KDS193

22K

D14

Q32

KRC104S

(ND)

B+

C70

1uF

0.0015

5

1K

C108

KRC104S

6

7

C66

470P

RV1

10K

5817

+

Q19

KTC3875S

C59

0.47
(40)

4.7/10

R110

4

IC3A

LM358

270

C84

0.001

3 7 8

1

C80

470P

C78

470P

5V

8

2

­3

+

4

C81

470P

C60

D17

FRONT-END (VHF) SCHEMATIC

P/N: 650-110-0012

D11

R82

R83

R84

R91
470

L17

1mH

18K

C116

0.1

C146
220P

TH1
33K

R85
39K

B+

C103
470P

Q31

(ND)

R108

56K

KDS193

(F3)

C104

0.001

SQ

R89

22

RV4
1KB

R93

10K

18K

C105

47P

Q27

KTC3875S

(ALL)

C106

0.01

RV2
1KB

0R

L16

1mH

C115
220P

C112

0.033(K)

C111

0.1u(K)

Q28

KRC104S

(ND)

C126

0.01

R62
68K

1%

C113

0.1u(K)

R92

2.7K

C145
470P

C68

0.001UF

R109

0.1
R59

1W

39

R99

100K

1%

R135

4.7M

C82

470P

R57

100K

1%

R61
68K

1%

AUDIO AMP

R88
100

C114

0.01

D15
4004

+

P/N: 650-200-0004

TX B2

R56
270

L6

1uH

B+

KTA1504S (ASY)

+

C132

4.7/20

C133

1/16

5

6

+

O

V

U

C

T

C

LM386N-3

IC6

+

G

I

N

N

D

3

4

C137
470P

R118

N/F

FUSE

SCHEMATIC

Q33

C72
6PF

7

B
.
P

­I
N

2

C67
470P

C76 9PF

C134

0.047

8

G
A
2

G
A
1

1

R117

22K

R122

4.7K

R121
220K

L7

L8

4T

4T

C73

30PF

SWB+

R113
470K

R114

100K

R115

22

+

C135

10/4

R116

22K

+

NICAD

BATTERY

­P/N: 650-210-0010

C74

36PF

KRC104S

7.5V

REVISIONS

A

RELEASED TO MFG DGC

L11

4T

D5

UPP9401

R70

470K

C75

24PF

UPP9401

1

IN

2

GND

DESCRIPTIONDESCRIPTIONREV

C77

0.001uF

L13

8T

D6

C83

7P

C49
N/F

R69

470K

R58

470K

ANT1
STUD

Y

HG B

C

DATE

4/20/01

B+

PWR

SW

Q34

(ND)

VR3

20KA

R123

LK501

0R

N/F

VOLUME

AF EN

ALERT

SPK

AUDIO

N/S SW

CHARGE

TITLE

SP-310, SP-330

VHF RF SCHEMATIC

DOCUMENT
NUMBER

SCALE

NA

SHEET

SIZE

B

OF

1

1

VHF RF Schematic

PAGE -45-

May 2001

C907

0.1

R128

10K

TCXO

LOCK D/T

C901

0.01

PLL EN

MOD

470P

DATA
CLOCK

TX EN
RX EN

R43
10K

C57

STREENG

R18
10K

C10

10/4

P/S 5V

TX 5V
BUSY

C902

0.01

220P

5V

C13

0.01

12

11

13

14

16

15

C19

17

18

D901

KDS226

R125

22

R126

10K

+

RV5

10K

FREQ ADJUST

MOD

KDS226

B+

MOD

D902

TCXO1

12.8MHz

C903

0.01

C904

0.01

2

3

C152
470P

VCO TX SECTION

P/N: 650-030-0020

VCO RX SECTION

Q901

KTC4075

C908

33P

Q902

KTA2014

R130

100

OUT

GND

IC8A

LM358

-

+

R132

5.6K

R2

100K

8

1

4

Q5

KRA104S

(PD)

C11

C8

0.1

470P

R901

2.2K

Q903

KTC4075

(UHF)

R902

2.2K

R903

4.7K

Q4

KRA110S

(PK)

C15

0.1

5V

L19

10uH

R1

10K

+

C910

0.01

C16

C12

10/6.3

2P

R904

7.5K
R905

27K

Q904

KTC4075

IC2

20

19

18

17

16

15

14

13

12

11

C20

470PC1470P

C906

18P

OSI

DT

CK

EN

O/A

O/B

VDD

TST2

VCC

FIN

MC145191F

C109
470P

C905

18P

SWB+

OSO

VPD

GND

TST1

R906

7.5K

KTC4075

1

2

LD

3

*R

4

*V

5

6

PD

7

8

RX

9

10

FIN

IC1

TK11450

POWER SAVE

R907

Q905

27K

0.001

REVISIONS

B+

LK501

N/F

VOLUME
AF EN
ALERT
SPK
AUDIO

N/S SW

CHARGE

DESCRIPTIONDESCRIPTION

TITLE

SP-320 / SP-340

UHF RF SCHEMATIC

DOCUMENT
NUMBER

SCALE

NA

SHEET

REV

RELEASED TO MANUFACTURING

C49
N/F

C83
12P

Q34
KRC104S
(ND)

NICAD

7.5V

PWR

SW

VR3

20KA

R58
470K

R69
470K

A

ANT1
STUD

R123

0R

C68
27PF

C146
220P

R62
68K

1%

RX 5V

R85
39K

L6
820NH

4

C113

0.1U(K)

R92

2.7K

B+

R56
270

R99
100K
1%

TX B2

R135

4.7M

C145
470P

C67
470P

L7
3T

C76
N/F

C72
N/F

R109

B+

0.1
1W

R59
39

R57
100K

C82

1%

470P

R61
68K
1%

C84
470P

AUDIO AMP

C132

4.7/20

C133
1/16

R88

100

C114

0.01

D15

4004

+

P/N: 650-200-0004

L8
3T

C74

C73

8PF

3PF

Q33
KTA1504S(ASY)

+

+

5678

O

V

B

G

U

C

.

A

T

C

P

2

LM386N-3

IC6

C137
470P

R118

N/F

G

-

+

G

A

I

I

N

1

N

N

D

3

4

21

R117

22K

R121
220K

FUSE

SCHEMATIC

C134

0.047

L11
3T

R116

22K

D5

C77

UPP9401

470PF

R70

470K

C75

4.7PF

D6
UPP9401

L13
3T

1

2

SWB+

R113
470K

R114

100K

R115

47

+

C135

10/4

R122

4.7K

+

BATTERY

­P/N: 650-210-0010

Q14
KTC3875S(ALL)

7

R37

1.2K

C53
1uF

OUT

6

R26
18

C45
220P

5

PRE OUT
Q13
KTC3875S(ALL)

4

R25

4.7K

+

C44

4.7/10(T)

OUT

2

C43
5P

R21
33

C34
220P

1

C911

R908

0.01

R909

470

16V

R17

C26

12K

0.1

R3 2.2K

R4

R5

R6

R7

C17

0.1

1.8K

1.8K

1.8K

2K

Q8

KTA1504S

(ASY)

KTC3875S

C18

5V

C2

+

Q1

KRA102S

(PB)

D1

KDS181

(A3)

470P

5V

0.01

10/6.3

C9

KDS160

10

R8

910

C3

D18
KDS160

(ALL)

D20

R35

5.6K

C46
3P

R27

4.7K

R22

4.7K

R16
910

Q6

Q11

KTC3875S

(ALL)

R11
100

5V

C47
220P

R24

5.6K

SWB+

7.5V

R36
0R

R23
100

KRA110S

TX 5V

C54

220P

Q16
BFR92A
(P2)

L3
100NH

Q12
BFR92A
(P2)

R15
100

Q7

KTA1504S

(ASY)

R12

5.6K

C21

0.33
(P)

Q2

(PK)

470P

R28
220

C5

L4
18NH

C35
220P

C25
1uF

TX 5V

4.7/10

5V

Q3

KRA110S

(PK)

C51
6P

R34
18

R31
300

C39
470P

C37

5.6P

L1
18NHL218NH

C36
7PF

C24

0.01
(P)

R13

2.7K

C22

0.022
(P)

+

C6

R32
300

470P

C4

C38
15PF

0.01

RX 5V

R41

22

TP1

R14

2.7K

C23

(P)

TX 5V

C55
470P

L5

R42

18NH

12K

C50
12P

R33

6.8K

C42
27PF

C41
6PF

Q17
MMBR951

C56

12P

PWR H/L

C69
N/F

1

2

TX5V

R23
KRC104S

6

P.A. MODULE(UHF) SCHEMATIC

P/N: 650-230-0013

7

R53

10KC88

Q21
KTC3875S
(ALL)

R55

1.2K

6

OUT

5

GND

5

B+

C70
1uF

C66
470P

RV1
10K

D17
5817

Q19
KTC3875S

C59

0.47
(40)

C60

4.7/10

+

C78

5V

470P
IC3A
LM358

82

-

1

3

+

4

R110
270

R64
22

C80
470P

C81
470P

FRONT-END (UHF) SCHEMATIC

P/N: 650-110-0013

3

C58
470P

C61

470P
R63
150

RV3
10K

C62
470P

MIXER

L31
N/F

D9
ND433G

T3

5

6

7

8

XF1

45.1M

L12
N/F

R45
22K

C90
11P

R49
22R

C79

0.1uF

R46

2.2K

4

3

2

1

LK100 N/F

TX B2

C64
470P

6

-

5

+

C63

0.01

R50
1M

T2

C92
18P

R79
10R

IC3B
LM358

7

L14
680NH

C93

82P

4

C65
10/10

Q18
KRC104S
(ND)

C14
470P

C87
22P

R52

3.3K

R65
51

R47 2R2
R48 2R2
R51 2R2

+

L15

150nH

Q22
KTA1663
(HY)

R54

0.1

1K

R66

470P

100

C94
1uF

C96

0.01

C97
30P

R94

1K

R97

C7

10

220K

Q25

BFR92A

(P2)

R71

R72

X1

44.645

C117

47P

++

C127

0.01

C128
10/10

C129
10/16

R102

22K

R67
22K

1K

C98

0.001

L18

1uH

R98

R101

N/F

D13

KDS181S

Q24

KRC104S

(ND)

1
6

M
I
X

IC5

I

MC3371

O
S
C
1

1

C118

33P

C121

20P

G
N
D

O
S
C
2

10K

R103

10K

R68
22K

1
5

M
U
T
E

M
I
X

O

2

C131

0.01

1
4

3

C122

.001

R104

10K

D8

KDS193

(F3)

1
3

M
E

D
R
V

V
C
C

4

R111

10K

+

C95

4.7/10

22K
18-27K

R75

C102

0.1U(K)

R74

R76
22K

R77
22K

47K

R87

C107

330K

10P

1

1

1
2

S
Q

I

L
M
T

I

5

C123

0.01

C124

1

F
I
L

O

D
C
O
U
P

6

0.1U(K)

C125

455F

F
I
L

I

D
C
O
U
P

CF1

0

7

CF2

455HT

9

A
F

Q
U
A
D

R96

8

39K

1

2

T1

R95

3210796

82K

R106

R105

27K

R112

Q26
KTC3875S
(ALL)

D12

KDS193

R107

N/F

KDS181S

22K

D14

Q32

KRC104S

R78

2.7K

R81

2.7K

R86 1K

C108

0.0015

KRC104S

Q31

C103

470P

R108

56K

D11
KDS193
(F3)

C104

0.001

R89

RV4
1KB

R82
10K

C105
47P

Q27

KTC3875

(ALL)

C106

0.01

SQ

L16

1mH

RV2
1KB

18K

C111

0.1U(K)

18K

TH1
33K

C112

0.033(K)

1mH

L17

R84

R83

22

R91

C116

470

C115

0.01

R93

100

220P

Q28

KRC104S

C126

0.01

22K

CHG B

DC 04/01

OF

1

Y

DATE

SIZE

B

1

PAGE -46­May 2001

UHF RF Schematic

TCXO MOD

TCXO

TCXO (12.8MHz)

TCXO1

+5V

Ref Freq

BALANCE

RV401

IC405B

BUFFER

TX B+

INVERTER

12

L/D

Q5

IC401A

1
3

PLL CIRCUIT

B+

IC407

2ND LPF

IC2

PLL EN

DATA

CPU

DC/DC CONVERTER

SUB AUDIO LEVEL

IC406B

RV403

REVISIONS

REV

RELEASED TO MANUFACTURING

P.A. MODULE

R

V

F in

16V

LEVEL SHFTER

Q6,7,8,11

IC411

14053 X

IC406C

2ND LPF

REF L.P.F.

C21,C22

6TH LPF

IC407 MF6

IC407

CONT

CONT

TX VCO

Q202/203

TX VCO

Q302/303

RX VCO

14503 Y

MOD

TX BUFFER

Q16/Q17

TX 5V

Q12

RX BUFFER

R478,479,480

CTCSS/DCS

ENCODE

IC406A

2ND
LPF

Q501 Q502 Q503

Q22

CONTROL

LOCAL LPF

L1,L2

FRONT END

T2/3/D9
MIXER

RV3

POWER ADJUST

LOW

FROM CPU

FILTER

IC3B

RV1

POWER ADJUST

HI

LOW NOISE AMP

Q60

RX
5V

CURRENT SENSOR

IC3A

CURRENT DETECTOR

FILTER

L.P.F.

V Batt

25KHz BAND PASS

CF1

TX B+

ANT SW

D5

ANT

D6

A

DESCRIPTIONDESCRIPTION

CHG BY

DGC 03/01

DATE

TX/RX INDICATION

LED1

DUAL COLOR

MON

PTT

OPTION

CON701

1
2
3
4
5
6
7
8
9

10

11

12

12PIN

MIC1

GND

CH SEL

Q404/405

LED

DRIVER

+7.5V

SPK

MIC

VCC

Q403/417

LOW BATT

DETECTOR

IC411

14503 Z

L/D

CHANNEL

LED

CONT

LOW BATT

IC408

EEPROM

386 EN

IC410

300HZ HPF

IC409

CPU

ALERT

Q410

RESET

IC404C/D

TX AF AMP

CALL DET

SUB AUDIO

ENCODE

BUSY

TX MOD LEVEL

X401

RV402

3.57

IC 404A/B
3KHz LPF

SPLITTER FILTER

Q24

INVERTER

XF1

1st IF FILTER

45.1MHz

R451/C471

DEMPHASIS

L16/C111

NOISE FILTER

1st IF AMP

Q25

SQ LEVEL

CPU AF MUTE

RV2

X1

2nd LOCAL

44.645MHz

RX +5V

MIXER
INPUT

Q27

NOISE AMP

RX +5V

IC402

4

AF LEVEL

3

5

VR3

455KHz

12.5KHz BAND PASS

455KHz

IC5 IF IC

MUTE

AF OUT FIL IN FIL OUT

CF2

Q26

INTEGRATER

IC6

LM386

AUDIO AMP

FAST

MUTE

SQ IN

T1

QUADRATURE

SP1

V Batt

D15

CHARGE

FUSE

VCC

D16

REVERS PROTECTOR

VCC

5V REGULATOR

IC1

5V

TITLE

SP-300 Series
SYSTEM ELECTRICAL
BLOCK DIAGRAM

DOCUMENT
NUMBER

SCALE

060-***-****

NA

SHEET

SIZE

B

OF

1

1

PAGE -47-

Block Diagram

May 2001

PCB LAYOUTS

FRONT END

MODULE

L16

RV2

L18

LK100

RV4

IC5

LED1

L17

T1

TCXO1

VR3

C701

C136

R93

J3

CF1

XF1X1

CF2

XF2

C13

R125

C132

L15

FON1

C93

R65

CH404

C87

T2

L14

T3

C75

R70

C74

D407

L11

C76

Q22

L13

C73

VR1

RV3

R54

L8

L7

R53

C65

W1

C484

C483

D5

PA

MODULE

TX1

B+1

C428

C426

C433

CON404

RV401

R408

R439

C464

C425

C463

B+2

R486

C465

IC410

IC407

C57

R459

C474

R441

C449 R412

R43

R446

R442

R493

C471

R452

R451

C478

R480

C448

C145

C146

D15

R483

Q402

R453

C470

R407

R479

R411

R478

IC409

TP1

C19

IC401

R431

RV402

Board Layout (Top)

Main Board Assembly 416121B

C24

C23

C404

R432

R495

R406

R414

R450

X401

D701

RX1

D406

Q406

R421

R449

IC408

C22

C21

C439

R701

RV403

C457

C460

R429

R461

C461

416121B

TCXO

MODULE

VCO

MODULE

Board Layout

Board Layout (Bottom)

Main Board Assembly 416121B

PAGE -48­May 2001

7

SEE NOTE 1

8

X2

2

Q'TY

1

1

1

1

1

1

1

2

1

1

1

1

1

1

1

1

11

1

1

1

1

1

2

1

1

1

1

2

1

1

1

1

1

2

1

1

1

1

2

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

6

1

2

2

4

4

1

1

1

1

550-021-0025

490-070-0035

650-180-0021

560-130-0046

760-040-0027

560-050-0058

330-110-0134

SEE NOTE 1

SEE NOTE 1

330-220-0018

330-220-0017

490-200-0054

490-200-0055

330-260-0004

330-260-0005

660-090-0107

660-090-0106

330-230-0051

330-220-0019

050-010-0024

560-090-0043

330-111-0069

330-160-0013

050-020-0002

550-090-0010

760-100-0003

330-110-0143

660-160-0047

660-010-0175

330-110-0146

560-070-0011-C

330-110-0131

906-723

480-020-0017

650-230-0012

650-230-0013

560-090-0012

390-025-0007

560-132-0001

NOT AVAILABLE

NO T AV AILAB LE

NO T AV AILAB LE

NO T AV AILAB LE1

650-030-0021

650-030-0020

650-100-0002

650-110-0012

650-110-0013

830-010-0010

830-010-0011

902-001-0203

140-020-0054

560-110-0101

772-363-A

330-220-0049

560-082-0007

010-051-0007

560-110-0100

650-200-0004

560-090-0072

600-788

330-220-0037

330-110-0130

NOT AVAILABLE

NOT AVAILABLE

SEE NOTE 2

550-070-0021

2

3

4

5

6

7

8

ONLY

UHF

8-1

9

10

11

11-1

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

33-1

34

35

36

37

37-1

37-2

37-3

38

38-1

39

40

40-1

41

41-1

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

VHF

56

55

UHF

58

57

INCLUDES

SEE NOTE 2

32

X2

41

SEE NOTE 3

X4

54

X4

53

47

42

48

X2

49

50

X2

43

45

44

37

31

38

51

52

X2

46

PART NO.

480-042-0020

480-042-0027

480-042-0026

480-042-0028

550-030-0024

550-090-0008

ASSEMBLIES GUIDE

DESCRIPTION

A/C Interconnect Assembly

Knob Kit

Front Cover Kit

PTT Cover Kit

Back Cover Assembly

PTT Pad Assy

23, 24, 27 AND 2PCS OF 25

12, 13, 14 AND 15

1, 2, 9, 10, 11, 11-1, 16, 17 AND 26

4, 5, 6 AND 2 PCS OF 7

47, 48, 50, 55, 2 pcs ea of 49, 51 and 52

4 and 5

15

12

11

9

26

14

13

30

X2

36

40

29

39

10

20

X2

4

19

35

6

5

3

16

18

17

34

33

1

m

a

x

o

n

22

21

X2

25

27

24

23

28

NOTES:

1. Contact Topaz3 Customer Service Department for antenna part numbers.

2. Refer to Maxon Price Guides for battery options.

3. Item 30 (Antenna Stud Kit) includes all hardware to mount antenna.

PART NAMEPART NO.NO.

UPPER COVER ASS'Y

NAME PLATE

PTT ASSEMBLY

PTT TENSION PLATE

PTT PAD

HOLDER PTT

(+)MACHINE SCREW (PH)

HELICAL ANT (VHF)

WHIP ANT (UHF)

CH GASKET

VOL GASKET

TOP OVERLAY (4 CHANNEL)

TOP OVERLAY (16 CHANNEL)

SPRING(CH)

SPRING(VOL)

KNOB VOL.

KNOB CH.

FELT

GASKET

SPEAKER

BRACKET(SPK)

(+)TAPPING SCREW (BH)

BUSHING(MIC)

MIC CONDENSER

A/C HOUSING ASS'Y

CONNECTOR SEAL

(+)MACHINE SCREW (PH)

LENS(LED)

COVER A/C

(+)MACHINE SCREW (FH)

CHASSIS

(+)MACHINE SCREW (PH)

PROTECTION SHEET

ANTENNA STUD KIT

PA MODULE (VHF)

PA MODULE (UHF)

BRACKET

INSULATION PLATE

SPACER(CH SW MTG)

P.C.B MAIN (SP-300)

P.C.B MAIN (SP-310)

P.C.B MAIN (SP-320)

P.C.B MAIN (SP-330)

VCO MODULE (VHF)

VCO MODULE (UHF)

TCXO MODULE

FRONT END MODULE (VHF)

FRONT END MODULE (UHF)

ROTARY SW (4 CHANNEL)

ROTARY SW (16 CHANNEL)

VOLUME (ON/OFF) SWITCH

CONNECTOR SOCKET

TERMINAL

SHIELD CAN

GASKET RING

COVER BACK

DOUBLE TAPE

TERMINAL

SUB PCB

BRACKET

(+)MACHINE SCREW (PH)

GASKET RING

(+)MACHINE SCREW (PH)

FCC NO LABEL

NAME LABEL

BATTERY PACK

BELT CLIP

Exploded View

PAGE -49-

May 2001