TTI tcb880, CB TCB880 Service Manual

SERVICE
MANUAL

MULTI CHANNEL AM/FM TRANSCEIVER

TCB-880

TTI Tech

TABLE OF CONTENTS

SECTION 1 SPECIFICATIONS

SECTION 2 CIRCUIT DESCRIPTION

1 GENERAL

2 TECHNICAL DESCRIPTION

3 SEMICONDUCTORS AND FUNCTION

4 DESCRIPTION OF FREQUENCY DETERMINING AND STABILIZING CIRCUIT

5 TEST EQUIPMENT SETUP AND ALIGNMENT INSTRUCTIONS

SECTION

SECTION

SECTION 5 BOARD LAYOUT

SECTION 6 BLOCK DIAGRAM

3 PART LIST

4 MECHANICAL DISASSEMBLY

5-1 MAIN PCB

5-2

5-3 LED PCB

5-4 VOLUME PCB

5-5 MIC PCB

FRONT PCB

SECTION 7 SCHEMATIC

SECTION1 SPECIFICATIONS

Channel
Frequency Range
Operating mode

G

Frequency Control

E

Frequency Tolerance

N
E

Operating Temperature Range

R

Microphone

A

Input Voltage

L

Size
Weight
Antenna Connector

T

Power Output

R

Modulation

A
N
S

M

Frequency Response

I

Output Impedance

T
T

Harmonic Suppression

E

Current Drain

R

40 (See the frequency band chart)

26.96 MHz ~ 27.99125 MHz
F3E (FM), A3E (AM)
PLL Synthersizer

0.002%

-10 to + 55 C
Plug-in Type

13.2V DC ± 15%
156 (W) x 176 (L) x 51(H)
990 g
SO-239 type
Duty cycle 10% 4 Watts @13.8V DC
AM:from 85% to 95%
FM:1.8KHz ± 0.2KHz
300Hz to 3000Hz
50ohms, Unbalanced
More than -36dBm

AM Full Mod. 1.6A Max.
Receiving System
IF Frequencies
Sensitivity

R

Dual conversion superheterodyne

Double Conversion 1st 10.695MHz/2nd 455KHz

0.7 V for 10dB(S+N)/N

in AM Mode

0.5 V for 20dB SINAD in FM Mode

E

Audio Output Power

C

Audio Distortion

E

I

Image Rejection

V

Adjacent Channel Rejection

2.0W @ 8 Ohm

Less then 8% @ 1KHz

60 dB

60 dB

E

Conducted Spurious

R

Frequency Response
Built-in Speaker
Squelch

More than 60 dB

300 to 2500Hz

8 Ohms, round

Adjustable; Threshold less than 1 microvolt

* Specification is subject to change without prior notice.

SECTION2 CIRCUIT DESCRIPTION

------------ Contents -------------

1 General
1-1. Receiver

1.2. Transmitter

2. Technical Description
2-1. General
2-2. Type of emission
2-3. Frequency Table
2-4. RF Power Output
2-5. DC input Voltage and Current with 13.2V DC Input to Power AMP
2-6. Receiver IF and Local Oscillator Frequencies

3. Semiconductors and Function

4. Description of Frequency Determining and Stabilizing Circuit
4-1. Introduction
4-2. Basic Synthesis Scheme
4-3. Descriptions of Each Block
4-3-1. Introduction
4-3-2. Reference Frequency
4-3-3. VCO
4-3-4. Programmable Divider and its Control
4-3-5 Phase Detector and VCO Control
4-3-6. Transmitter / Receiver Buffer AMP
4-3-7. Transmitter Doublers
4-3-8. Switching of Turning Capacitor in VCO
4-3-9. Receiver Local Oscillator Outputs
4-4. Frequency Stability
4-5. Description of other Circuits
4-5-1. Transmitter
4-5-2. Receiver

5. Test Equipment Setup and Alignment Instructions
5-1. General Section
5-2. Transmitter Section
5-3. Receiver Section

1. General

1-1. Receiver

① Display : 40 Channels and other functions indication
② Frequency Range : 26.965 to 27.405 [MHz]
③ Frequency Response : 300 to 2,500 [Hz]
④ Power Source : 13.2 [V] DC
⑤ Audio Output Load : 8 [OHM]
⑥ Audio Output : 4.0 [W] (or More)
⑦ Squelch : Adjustable from 0.3[uV] to 100 [uV]
⑧ Sensitivity :

- FM : 20 dB [SINAD] under 1.0 [uV] RF Signal or less

- AM :10 dB [S/N] under 1.0 [uV] RF Signal or less

⑨ Intermediate Frequency :

- 1st IF : 10.695 [MHz]

- 2nd IF : 455 [KHz]

1-2. Transmitter

① Carrier Power(Conducted) : AM 1 [W] / FM 4 [W]
② Current Drain ( 13.2 [V] Supply Voltage)

- No Modulation : 1,000 [mA]

- Max Modulation : 1,400 [mA]

③ Modulation Capabilities

- AM : ± 90 [%]

- FM : ± 1.8 [KHz/Dev]

④ Spurious Radiation : Less then 74 [dBc]
⑤ Antenna Impedance : 50 [OHM]
⑥ Frequency Tolerance : 0.002 [%]

2. Technical Description

2-1. General

Model CB-880 is an mobile type AM/FM radio transceiver for use of the Citizen Radio Service.

z Front Panel Controls

① LCD (Cannel and RX/TX Signal Level Indicator).
② Receiver Audio Control (With Power ON/OFF Control) Volume
③ Squelch Control Volume
④ RF Gain Control Volume
⑤ MIC GAIN Control Volume
⑥ CHANNEL UP/DOWN Rotary Switch
⑦ Q.CHANNEL UP/DOWN Rotary Switch
⑧ Memory(M1, M2, M3, M4) Key
⑨ DW(Dual Watch) Key
⑩ EMG(Emergency Channel Select) Key
⑪ AM/FM Select Key
⑫ Scan Key
⑬ CB/PA Slide Switch
⑭ ANL/OFF Slide Switch
⑮ LOCAL/DX Slide Switch

z Accessorily Connectors

① Antenna Socket
② External Speaker Jack
③ External PA Jack
④ External Signal Meter Jack
⑤ Microphone(Condenser Microphone)

2-2. Type of emission : AM(A3E) , FM(F3E)

2-3. Frequency Table

Channel Frequency (MHz) Channel Frequency (MHz)

1 26.965 21 27.215
2 26.975 22 27.225
3 26.985 23 27.235
4 27.005 24 27.245
5 27.015 25 27.255
6 27.025 26 27.265
7 27.035 27 27.275
8 27.055 28 27.285

9 27.065 29 27.295
10 27.075 30 27.305
11 27.085 31 27.315
12 27.105 32 27.325
13 27.115 33 27.335
14 27.125 34 27.345
15 27.135 35 27.355
16 27.155 36 27.365
17 27.165 37 27.375
18 27.175 38 27.385
19 27.185 39 27.395
20 27.205 40 27.405

2-4. RF Power Output

z AM : 1.0 [W]
z FM : 4.0 [W]

2-5. DC Iinput Voltage and Current with 13.2V DC Input to Power AMP

z Transmitter Power Amp : Voltage 12.5 V

Current 727 mA

z Transmitter Driver Amp : Voltage 12.5 V

Current 120 mA

2-6. Receiver IF and Local Oscillator Frequencies

z First IF : 10.695 [MHz]
z Second IF : 455 [KHz]
z First Local Oscillator : 10.695 [MHz] Below Receiving Frequency
z Second Local Oscillation : 10.240 [MHz]

3. Semiconductors and Function
3-1. Transistor

--------------------------------------------------------------------------------------------------------------------------------------------

Ref No. Description Manufacturer Function

--------------------------------------------------------------------------------------------------------------------------------------------

Q101 KTC3880S KEC RX Amplifier
Q102 KTK211 KEC 1’st Mixer
Q103 KTK211 KEC 1’st Mixer
Q104 KRC101S KEC RX Band1 Switching
Q105 KRC101S KEC RX Band2 Switching
Q121 KRC110S KEC
Q122 KRC112S KEC RX RSSI Level Control
Q131 KTC3875S KEC Squelch
Q151 KTC3875S KEC RX FM AF Amplifier
Q152 KRC112S KEC FM AF Mute at AM Mode
Q153 KRC101S KEC FM AF Mute at AM Mode
Q154 KRC112S KEC RX AF Mute at TX Mode
Q161 KTC3880S KEC AM IF Amplifier
Q162 KTC3880S KEC AM IF Amplifier
Q163 KRA102S KEC RX AM B+
Q164 KTA1504S KEC Automatic Noise Level Control
Q181 KTC3875S KEC RX RF Mute at TX Mode
Q182 KTC3875S KEC AGC
Q183 KTC3875S KEC AGC
Q201 KRC101S KEC AF Mute
Q202 KRC202S KEC AF Path
Q233 KTA1504S KEC Automatic Level Control
Q234 KTC3875S KEC Automatic Level Control
Q301 KTC3880S KEC VCO
Q302 KTC3880S KEC RX/TX VCO Buffer
Q303 KTC3880S KEC VCO Buffer
Q305 KRC101S KEC TX VCO Control
Q311 KRC101S KEC RX Band1 Switching
Q312 KRC101S KEC RX Band2 Switching
Q313 KRC101S KEC RX Band3 Switching
Q502 KTC3875S KEC FM TX AF Mute at AM TX
Q701 KTC3880S KEC TX Doublers
Q702 KTC3880S KEC TX Pre-Amplifier
Q703 KTC1006 KEC TX Driver Amplifier
Q704 2SC2078 SANYO TX Power Amplifier
Q742 KTC3875S KEC TX RF Mute at RX Mode
Q801 KRC101S KEC CPU Reset
Q802 KRC101S KEC CPU RX/TX Control
Q803 KRA101S KEC MIC Lock Control
Q911 KTA1658 KEC Main Regulator
Q912 KRA1504S KEC Main Regulator
Q913 KRC112S KEC Main Regulator Control
Q914 KRC102S KEC Power Low Control
Q921 KTC3875S KEC 8.2V Regulator
Q922 KRC112S KEC 8.2V Regulator Mute at PA Mode
Q923 KTC3875S KEC RX B+
Q924 KRA1504S KEC TX B+

Q941 KRC111S KEC Mute
Q942 KRC112S KEC TX B+ Mute at TX Mode
Q951 KTA1241 KEC Back Light LED Control
Q952 KTA1241 KEC Back Light LED Control
Q953 KRC101S KEC Back Light LED Control
Q954 KRC101S KEC Back Light LED Control
Q961 KRC110S KEC TX AF Mute at RX Mode
Q962 KRC111S KEC MIC AF Path at AM Mode
Q963 KRC111S KEC MIC AF Path at PA Mode

3-2. IC

--------------------------------------------------------------------------------------------------------------------------------------------

Ref No. Description Manufacturer Function

--------------------------------------------------------------------------------------------------------------------------------------------

IC101 TK144889V TOKO IF IC
IC102 KIA358F KEC AGC, Squelch Control
IC201 KIA7217AP KEC AF Power Amplifier
IC301 LC7152NM SANYO PLL
IC401 KIA4558F KEC FM TX AF
IC801 TMP87PP21DF TOSHIBA CPU
IC802 24WC02 ATMEL EEPROM

3-3. Manufacture Information

z KEC ---------------------- KEC Co., LTD.
z SANYO ---------------------- SANYO Semiconductor Co., LTD.
z TOKO ---------------------- TOKO, Inc.
z TOSHIBA ---------------------- Toshiba Semiconductor. Co., LTD.
z ATMEL ---------------------- ATMEL Co., LTD

4. Description of Frequency Determining and Stabilizing Circuit

4-1. Introduction

The Frequencies for transmitter and receiver first local frequenci es are all derived from a signal

4.5MHz crystal by means of a phase locked loop(PLL).
The first local oscillator frequencies are 16.270MHz(CH1) to 16.710MHz(CH40). The second local
frequency is fixed at 10.240MHz to generate second IF 455KHz.
Transmit, the VCO of the PLL operates 13.4825MHz(CH1) to 13.7025MHz(40CH). The VCO frequency
goes to the doublers circuit Q701, L701, L702 with doubles the frequency to generate 26.965MHz(CH1)
to 27.405MHz(40CH).

Q302
VCO

13.4825MHz(CH1)
~

13.7025MHz(CH40)

The VCO op erating frequency for the receiver is 16.27MHz(CH1) to 16.710MHz(CH40) as the
first local oscillator, injected through the buffer amplifier Q302 into the first FET balanced mixer Q102,
Q103.

4-2. Basic Synthesis Scheme

The crystal frequency(4.5MHz) is divided by 1800 times to make 2.5KHz which is fed to one
side of the phase detector. The VCO output is divided by a programmable divider, and fed to other side of
the phase detector Pin 9, 10 of IC301. Passing the phase detector output closes the feedback loop through
an active low pass filter and using the output to control the VCO frequency through varicap diode D301.
Under locked conditions, both of phase detector input signal must be identical at 2.5KHz.
The VCO frequency is then given by ;

Receiver : Fvco / N = 0.005 [MHz] OR Fvco = 0.005 X N [MHz]
Transmitter : Fvco / N = 0.0025 [MHz] OR Fvco = 0.0025 X N [MHz]

Since “N” is an integer, the VCO frequency can be stepped up with in receiver mode 5KHz and
transmitter mode 2.5KHz increments.
By suitable choice of “N” the desired output frequency can be obtained.

27.405MHz(CH40)

Q701

Doublers

26.965MHz(CH1)

To transmitter

~

Channel 1 Channel 40

N Fvco N Fvco

Transmit 5393 13.4825 5481 13.7025
Receiver 3254 16.2700 3342 16.7100

See the [Table 1]for other Channels

The VCO frequency goes to the doublers circuit, with doubles the incoming signals.

VCO Output Frequency Doublers Output Frequency

Transmit

---

---

---

Transmit

Since all frequencies are obtained from the crystal controlled PLL oscillator, all outputs are
coherent with the crystal oscillator frequency and matching the sample percentage accuracy.
Note that the reference frequency of 5KHz(receiver) and 2.5KHz(transmitter) is obtained by
dividing the 4.5MHz by 900 times and 1800 times
See Table 1 for transmitter/receiver mode VCO frequencies.

CH 1 , 13.4825 MHz

CH 40 , 13.7025 MHz

26.965 MHz

27.405 MHz

Program Data & Frequency[Table 1]

Channel

1 26.965 3254 16.27
2 26.975 3256 16.28
3 26.985 3258 16.29
4 27.005 3262 16.31
5 27.015 3264 16.32
6 27.025 3266 16.33
7 27.035 3268 16.34
8 27.055 3272 16.36

9 27.065 3274 16.37
10 27.075 3276 16.38
11 27.085 3278 16.39
12 27.105 3282 16.41
13 27.115 3284 16.42
14 27.125 3286 16.43
15 27.135 3288 16.44
16 27.155 3292 16.46
17 27.165 3294 16.47
18 27.175 3296 16.48
19 27.185 3298 16.49
20 27.205 3302 16.51
21 27.215 3304 16.52
22 27.225 3306 16.53
23 27.255 3312 16.56
24 27.235 3308 16.54
25 27.245 3310 16.55
26 27.265 3314 16.57
27 27.275 3316 16.58
28 27.285 3318 16.59
29 27.295 3320 16.60
30 27.305 3322 16.61
31 27.315 3324 16.62
32 27.325 3326 16.63
33 27.335 3328 16.64
34 27.345 3330 16.65
35 27.355 3332 16.66
36 27.365 3334 16.67
37 27.375 3336 16.68
38 27.385 3338 16.69
39 27.395 3340 16.70
40 27.405 3342 16.71

Frequency

[MHz]

N Fvco N Fvco

RX TX

5393
5395
5397
5401
5403
5405
5407
5411
5413
5415
5417
5421
5423
5425
5427
5431
5433
5435
5437
5441
5443
5445
5451
5447
5449
5453
5455
5457
5459
5461
5463
5465
5467
5469
5471
5473
5475
5477
5479
5481

13.4825

13.4875

13.4925

13.5025

13.5075

13.5125

13.5175

13.5275

13.5325

13.5375

13.5425

13.5525

13.5575

13.5625

13.5675

13.5775

13.5825

13.5875

13.5925

13.6025

13.6075

13.6125

13.6275

13.6175

13.6225

13.6325

13.6375

13.6425

13.6475

13.6525

13.6575

13.6625

13.6675

13.6725

13.6775

13.6825

13.6875

13.6925

13.6975

13.7025

4-3. Descriptions of Each Block

4-3-1. Introduction

The synthesizer is implemented with the following components;

PLL IC (IC301)
X-TAL (X301)
VCO, VARICAP DIODE (D301)

IC1301 is CMOS LSI that includes most of PLL block.
The Q301, L301, C311, C312, C313, C314, varicap diode D301 are clap oscillator circuit to
operate as a VCO of the IC301. Q305 is a switching transistor to connect or disconnect the tuning
capacitor in the VCO oscillator tank circuit for transmitter or receiver.
Q302 works as a buffer amplifier for RX local frequencies (≒16MHz) and TX carrier

generating frequencies(≒13MHz)

4-3-2. Reference Frequency

The crystal X301(4.5MHz) and other components at Pin 1 and 24 of IC301 can make a reference
frequency oscillator with internal amplifier.

4-3-3. VCO

Q301 and surrounding parts are consisting a clap oscillator works as a VCO of IC301. With
appropriate control voltage on D301 the VCO can be oscillate over the required range of 13.4825MHz to

16.710MHz.

4-3-4. Programmable Divider and its Control

The programmable input for each channel are stetted by the PLL Clock(Pin 11), PLL Data(Pin

12), PLL Enable(Pin 13) of IC801. Each input signal to control the PLL ic is done with provide key input
Pin 18, 19, 25, 26, 27, 28, 29, 32, 33, 34, 35, 37. For each key input, an internal code converts EEPROM
appropriate control to the programmable divider for that channel.
Since the change transmit and receive, and additional bit is required at Pin 8 of IC801 to allow
the ROM to recognize the status TX or RX.
During transmit the push to talk switch makes Pin 8 ground with BRT(Q802), PLL IC works
under transmit status.
The programmable divider output fed to the phase detector for compare with the 2,5KHz
reference frequency IC301. See table 1 for actual input and divide ratio on all channels.

4-3-5. Phase Detector and VCO Control

The phase detector is a digital phase comparator witch compares the phase of the reference
signal with programmable divider output square waves and develops a series of pulses whose dc level
depends on the phase error of each signal.
The phase detector pulse output is fed to an active low pass filter and RC low pass filter output
signal of IC301 is filtered and fed to varicap D301 control the VCO frequency.

4-3-6. Transmitt er / Receiver Buffer AMP

Output signal of Q301 is fed into the buffer amplifier Q302, L302 to generate TX carrier
frequency and 1’st local frequencies.

4-3-7. Transmitter Doublers

The output signal of Q302, L302 goes to an amplifier with tuning circuit Q701, L701, L702
which doubles incoming 13MHz signals.

4-3-8. Switching of Turning Capacitor in VCO

The VCO circuit must tune with a wide range of frequencies 13.4825MHz ~ 13.7025MHz for
transmitter and 16.27MHz ~16.71MHz for receiver.
To comply above range of VCO, the tuning capacitance should switch for transmission. The
tuning circuit consists with L301, C311, C312, C313, and C314. When the VCO is working as a receiver
Q305 becomes turn OFF. So, L301 and C311, D301 makes turning function.
When transmitting, Q305 becomes ON. S the o, L301 an parallel capacitance of C316 and C311
make turning function.

4-3-9. Receiver Local Oscillator Outputs

z FIRST MIXER :

The secondary output signal of L107 is injected to the sources of 1’st mixer Q102, Q103 in the
1’st IF mixer section.

z SECOND MIXER :

The output of 10.24MHz oscillator circuit with X101 is injected into the IF IC(IC101) internally.
Incoming IF signal and 10.24MHz signal are mixed inside the IF IC to extract 2’nd IF signal 455KHz.

FM audio Signals are recovered with the way of quadrature detector.
AM signals are recovered with envelope detector.

4-4. Frequency Stability

Let : Fo = Crystal oscillator frequency
Fr = Phase detector reference frequency
Fvco = VCO frequency
Ft = Transmit frequency
Then : Receiver : Fr = Fo/900
Transmitter : Fr = Fo/1800
And under locked conditions : Fr = Fvco / N
Where, “N” is the programmable divider divide ratio.
Then : Fvco = N X Fr)
From which it can be seen, the percentage error in Ft is the same as the percen tage error in Fo.
The stability of the crystal oscillator is determined primarily by the crystal itself and having lesser
deviation by the active and passive components of the oscillator. The choice of crystal and components is
such that the required frequency stability is maintained over the required voltage and temperature range.

4-5. Description of other Circuits

4-5-1. Transmitter

A. RF Amplification

RF carrier frequencies are obtained at the output of doublers amplifier Q701 and turning IFT coil
L701, L702. The input of VCO frequencies 13MHz is selected at the doublers output, which creates the
necessary 27MHz. The output of doublers amplifier Q701 is fed through turning IFT coil L701, L702 to
the base of pre driver amplifier Q702. It’s output; 27MHz is coupled to RF driver amplifier Q703, a low­level class C power amplifier. Driver Q703 supplies the necessary power gain to operate RF final Q704 at
the maximum efficient. The output of Q704 is supplied to the antenna through L-C turning circuit.

B. Circuit for Suppression of Spurious Radiation

The turning circuit between the output of final amplifier Q704 and antenna, 4-stage “π”
network C722, C723, C724, L711, C725, C726, L712, C729, C731, L732, C732, C733, C734, L714,
C735 serves as a spurious radiation suppressor. This network also servers to match the impedance
between TX power amplifier Q704 and the antenna.

C. Circuits for Limiting Power

After finished all alignment, the constant voltage supply circuit limits the available power 4W or
slightly less. RV911 and corresponding three-transistor control supply voltage of RF power amplifier.
When power low switch function Q914 changed the supply voltage. Tune all the trimming parts for
maximum indication of RF power meter and adjust RV571 to make 4W indication of RF power meter.
After finishing the above adjustments check the RF power meter reading is changed 1W under “LOW”
state.
The turning is adjustment so that the actual power is from 3.8W to 4.0W. There are no other
additional controls for adjusting the TX output power.

D. Modulation Control
Modulation of the RF is a process that begins with the audio picked up by the microphone.

<FM>

The microphone input is fed to mic audio amplifier IC401 that drives modulation vricap diode
D302 in the VCO circuit RV401 limits the incoming modulation audio levels to inhibit over modulation.
While reading the modulation factor on the modulation analyzing equipment, adjustment RV401 shall not
exceed 2.0KHz deviation.
<AM>

Modulation signals are filtered with RC network and goes to the audio power amplifier IC201 in
to make normal signal level to achieve wanted modulation. IC201 drives T201, which is a combination
AF output/modulation transformer. During transmit, one of the secondary windings of T201 is tied
between the 13.2V DC supply and the collectors of RF driver Q703 and RF power amplifier Q704. As the
audio passes through T201 it causes the collector supplies of Q703 and Q704 to vary with audio,
producing an AM signal at carrier frequency.
To avoid over modulation of the carrier, a protection of the modulating signal is fed back from
the T201 through the AMC circuit, Q233 and Q234, to control the gain of IC201 and sets the maximum
level of modulation. Form the center tab of RV231 and Q233 the feedback signal is rectified by diode
D233, filtered by C233, and supplied the Q234. The collector of Q234 is tied directly TX audio input to
control gain. That is, when the audio output is higher that the preset level of RV231, the information is
reflected through Q233 and Q234, reducing the gain of IC201

4-5-2. Receiver

Overload protection is provided to receiver’s semiconductors by diode D101. These diodes have
a little effect on the incoming signal from another CB station; they protect the receiver from stray
transmitter energy.
In the receiver mode of operation, Q923 transistor is turned on. Also bias voltage is applied to
Q101, Q102, Q103, Q106.
Q101 is a 27MHz RF input amplifier, and any excessive input signal is limited by diode D101.
CB receiver is dual conversion super-heterodyne type with the first IF 10.695MHz and the
second IF 455KHz.
Receiver is separated to blocks, 1’st IF section and 2’nd IF section. The PLL synthesizer
supplies 1’st local frequency 16.270MHz ~ 16.710MHz. The amplified 27MHz is mixed. With the
provide 1’st local frequencies Q102, Q103 mixes the incoming RF signal to generate 1’st IF signal. The
resulting first IF is 10.695MHz. Q102 and Q103 is the first converter, and 10.695MHz is sharply filtered
by L108 and crystal filter CF101. The first IF is again mixed with a second local oscillator of 10.24MHz.
With the 10.240MHz signal, IC101 FM IF IC converts the incoming signals to generate 2’nd IF
signal and recovered audio signals. 2’nd IF is filtered by a razor sharp ceramic filter CF101 coupled. The
455KHz signal from the 2’nd IF filter was amplified and limits internally. After amplification the signals
fed to the quardrature detector loop L109. Then could see the recovered signals Pin 11 of IC101.
With the amplitude of recovered signals, Q151 serves as an amplifier.
AM signals from the Pin 6 of IC101 were tapped with C161 and amplified two-stage amplifier
Q161, Q162. Q161 is a first 455KHz amplifier, and the Q161 being the last amplifier. D106 is a detector
diode witch produce audio signal as well as negative DC voltage for AGC action. The negative voltage
also provides forward biasing to the emitter of ANL clipping transistor Q164. The biasing voltage has a
time constant determined R174 and C176. Therefore any sharp negative going pulse from D161 will back
bias Q164 and clipped. The way to recover the AM information audio is envelope detector.

5. Test Equipment Setup and Alignment Instructions

5-1 General Section
5-1-1 Test Equipm ent Required

• DC power supply(13.8V/3A)

• DC Voltmeter or Oscilloscope

• RF attenuator (30dB)

5-1-2 Alignment Procedure

Step Setting Connection Adjuster Adjust for

1

RX VCO voltage Adj.

Channel & Frequency :

1CH, 26.956 MHz
Mic : Receive
Volume : Optional
Squelch : Optional
RF Gain : Optional
Mic Gain : Optional

DC voltmeter to VCO
Test point (Figure 1)

L301 1.5~2.0 V DC

2

TX VCO voltage Adj.

Channel & Frequency :

1CH, 26.956 MHz
Mic : Transmit(No Mod)
Volume : Optional
Squelch : Optional
RF Gain : Optional
Mic Gain : Optional

DC voltmeter to VCO
Test point (Figure 1)

Figure 1

L301 1.5~2.0 V DC

5-2 Transmitter Section
5-2-1 Test Equipment Required

• RF Power Meter • DC power supply(13.8V/3A)

• 50 ohms load (non-inductive) • Spectrum analyzer

• RF attenuator (30dB) • Frequency counter

• Oscilloscope • Coupler

• Audio generator • Modulation meter

5-2-2 Alignment Procedure

Step Setting Connection Adjuster Adjust for

1

RF Power Adj.

Channel : 19CH
Function : AM or FM Mode
CB/ANL Off/DX
MIC : Transmit
Volume : Optional
Squelch : Optional
RF Gain : Optional
MIC Gain : Minimum

Connect dummy load and RF
Power Meter to the EXT–ANT
connector on the set(Figure 3)

L302
L701
L702
L703

Maximum
indication on
the Power
Meter(4.0W).
If indication is
not in 4W
range, ACP
Adjustment(R
V911)

2 Frequency Adj.

Channel & Frequency :

19CH, 26.956 MHz
Function : AM or FM Mode
CB/ANL Off/DX
Mic : Transmit(No Mod)
Volume : Optional
Squelch : Optional
RF Gain : Optional
MIC Gain : Optional

3

AM Modulation Adj.

Channel & Frequency :

19CH, 27.185MHz
MIC: Transmit
Function : AM Mode

CB/ANL Off/DX
Volume : Optional
Squelch : Optional
RF Gain : Optional
MIC Gain : Max

Connect dummy load and
Frequency Counter through
Coupler to RF Power Meter.
Connect RF Power Meter to
EXT-ANT connector on the
set(Figure 2).

Connection the audio
generator (set to 1 KHz)to the
microphone.
Connect the modulation meter
through the RF attenuator to
the ANT Connector. Adjust
the audio signal level to obtain
by 50% modulation.
When you increase the audio
signal by 20 dB, the
modulation should not exceed
95% Modulation(Figure 3).

CT302 Be sure that

the indication
of the
transmitter
frequency is

27.185MHz
±300 Hz on
the Frequency
Counter

RV231 85% ~ 95%

4

FM Deviation Adj.

Channel & Frequency :

19CH, 27.185MHz
MIC : Transmit
Function : FM Mode

CB/ANL Off/DX
Volume : Optional
Squelch : Optional
RF Gain : Optional
MIC Gain : Max

Connection the audio
generator (set to 1 KHz)to the
microphone.
Connect the modulation meter
through the RF attenuator to
the ANT Connector. Adjust
the audio signal level to obtain
by 1KHz deviation.
When you increase the audio
signal by 20 dB, the deviation
should not exceed 2.0KHz
deviation(Figure 3).

RV401 1.8KHz ~

2.0KHz

5

TX Signal Meter Adj.

Channel & Frequency :

19CH, 27.185MHz
MIC : Transmit
Function : FM Mode

CB/ANL Off/DX
Volume : Optional
Squelch : Optional
RF Gain : Optional
MIC Gain : Minimum

Connected through Dummy
load to RF Power Meter.
Connect RF Power to EXT­ANT connector on the
set(Figure 2)

Figure 2

RV571 Adjust for 4

watts RF
output power
on the signal
meter.

Figure 3

5-3 Receiver Section
5-3-1 Test Equipm ent Required

• Standard Signal Generator(SSG)

• DC power supply(13.8V/3A)

• AC Level Meter

• Distortion Meter

• Oscilloscope

• SINAD Meter

• 8 ohm Dummy Load

5-3-2 Alignment Procedure

Step Setting Connection Adjuster Adjust for

1

AM Audio Output Adj.
Channel & Frequency :

19CH, 27.185MHz
MIC : Receive
Function : AM Mode

CB/ANL Off/DX
Volume : Full clockwise
Squelch : Turn to counter

clockwise
RF Gain : Full clockwise

Connect RF Signal Generator
to EXT-ANT Connector.
Connect AC Level Meter and
Distortion Meter and SINAD
Meter across EXT SPK jack
with 8 ohm Dummy
Load(Figure 4)

L101
L103
L104
L105
L107
L108
L112

Maximum
indication on
AC Level
Meter. Reduce
output from
SSG until the
audio output
becomes about
2V.

2

FM Audio Output Adj.
Channel & Frequency :

19CH, 27.185MHz
MIC : Receive
Function : FM Mode

CB/ANL Off/DX
Volume : Full clockwise
Squelch : Turn to counter

clockwise
RF Gain : Full clockwise

3

Squelch Adj.
Channel & Frequency :

19CH, 27.185MHz
MIC : Receive
Function : FM Mode

CB/ANL Off/DX

SSG : 27.185MHz, 1KHz,

100uV, 1.5KHz Dev.
Volume : Full clockwise
Squelch : Full clockwise

clockwise
RF Gain : Full clockwise

Connect RF Signal Generator
to EXT-ANT Connector.
Connect AC Level Meter and
Distortion Meter and SINAD
Meter across EXT SPK jack
with 8 ohm Dummy
Load(Figure 4)

Connect RF Signal Generator
to EXT-ANT Connector.
Connect AC Level Meter and
Distortion Meter and SINAD
Meter across EXT SPK jack
with 8 ohm Dummy
Load(Figure 5)

L109 Maximum

indication on
AC Level
Meter. Reduce
output from
SSG until the
audio output
becomes about
2V.

RV131 Adjust until

the audio
output
appears.

4

RX Signal Meter Adj.

Channel & Frequency :

19CH, 27.185MHz
MIC : Receive
Function : FM Mode

CB/ANL Off/DX

SSG : 27.185MHz, 1KHz,

100uV, 1.5KHz Dev.
Volume : Full clockwise
Squelch : Full clockwise

clockwise
RF Gain : Full clockwise

Connect RF Signal Generator
to EXT-ANT Connector.
Connect AC Level Meter and
Distortion Meter and SINAD
Meter across EXT SPK jack
with 8 ohm Dummy
Load(Figure 4)

RV572 Adjust for S-9

on the signal
meter.

Figure 4

SECTION3 PART LIST

ITEM MAKER VENDOR ASS'Y TCB TCB REMARKS

* ELECT Parts

COVER ASS'Y

1 SPEAKER 77AR000-8P-4D29 ASAHI MAN 1 1 SPK201 ECO041217-03

2 WIRE HARNESS PH-2PIN TO OPEN UL1007 #26 L=200mm FINE FINE MAN 1 1 J204

ESCUTCHEON ASS'Y

3 PCB VOLUME 1LAYER MULTI MAN 1 1

4 PCB CHANNEL 1LAYER MULTI MAN 1 1

5 FILM RESISTOR 10K 1/8W 5% ST MAN 1 1 R400

6 VR A10K SJ161VS 25SK A10K SEJIN SEJIN MAN 1 1 VR101 ECO041217-03

7 VR B50K SJ161V 20SK B50K SEJIN SEJIN MAN 2 2 VR103, VR401 ECO041217-03

8 VR B10K SJ161V 20SK B10K SEJIN SEJIN MAN 1 1 VR102 ECO041217-03

9 SW ROTARY SJ-PS2101 20SK SEJIN SEJIN MAN 1 1 SW811 ECO041217-03

10 COIL AXIAL 6.8UH LAL03TB6R8K MAN 4 4 L501, L502, L504, L506

11 WAFER 3PIN PH-3A 180C FINE FINE MAN 2 2 J103, J104

12 WIRE HARNESS PH-3PIN*2 UL1007 #26 L=30MM FINE FINE MAN 1 1 J103 --- J104

13 WAFER 16PIN PH-16A 180C FINE FINE MAN 1 1 J101

14 WIRE HARNESS PH-16PIN*2 UL2468 #26 L=70MM FINE FINE MAN 1 1 J101 --- J102 ECO041215-01

15 WIRE HARNESS PH-6PIN TO OPEN UL1007 #26 L=70MM FINE FINE MAN 1 1 J502

16 CONNECTOR SOCKET N-16-6(RPCB)-M SAMWOO MAN 1 1 J501

17 HEAT SINK TUBE diameter 4 mm x 15mm MAN 6 6 ECO050321-01

LCD PCB ASS'Y

18 PCB LED FR-4 2 LAYER 1.0T MULTI MAN 1 1

19 PCB DISPLAY (FRONT) FR-4 2 LAYER 1.6T MULTI MAN 1 1

20 CHIP RESISTOR 1K 1/16W 5% T 1608 PHILIPS SMD 2 2 R810, R818

21 CHIP RESISTOR 10K 1/16W 5% T 1608 PHILIPS SMD 5 5 R805, R806, R807, R811, R814

22 CHIP RESISTOR 100K 1/16W 5% T 1608 PHILIPS SMD 1 1 R804

23 CHIP RESISTOR 1M 1/16W 5% T 1608 PHILIPS SMD 1 1 R803

24 CHIP RESISTOR 2.2K 1/16W 5% T 1608 PHILIPS SMD 6 6 R209, R832, R833, R834, R835, R836

25 CHIP RESISTOR 220K 1/16W 5% T 1608 PHILIPS SMD 1 1 R808

26 CHIP RESISTOR 47K 1/16W 5% T 1608 PHILIPS SMD 16 16

27 CHIP CERAMIC 0.01UF 1608 PHILIPS SMD 2 2 C806, C807

28 CHIP CERAMIC 1UF 1608 PHILIPS SMD 1 1 C805

29 CHIP CERAMIC 68PF 1608 PHILIPS SMD 2 2 C801, C802

30 CHIP TANTAL 10uF/16V A TYPE SMD 1 1 C811

31 CHIP TRANSISTOR KRA101S SOT-23 KEC SMD 1 1 Q803

32 CHIP TRANSISTOR KRC101S SOT-23 KEC SMD 1 1 Q802

33 CHIP TRANSISTOR KRC104S SOT-23 KEC SMD 1 1 Q801

34 LED VOL BACK LIGHT CHIP LED IWS-164-BXWF ITSWELL SMD 14 14

35 IC EEPROM AT24C02 ATMEL SMD 1 1 IC802

36 IC CPU TMP87PP21DF TOSHIBA SMD 1 1 IC801 ECO041217-03

NAME & DESCRIPTION VENDOE CODE

Q'ty

880 880B

Location NO

R812, R816, R831, R851, R852, R853,
R854, R855, R856, R857, R858, R859,
R861, R862, R863, R864

D954, D955, D956, D957, D958, D959,
D960, D963, D964, D965, D967, D968,
D951, D952

ECO041217-03
ECO050325-04
ECO050511-02

37 LCD DISPLAY SDMA2295B FOR TCB-880 SANTECH MAN 1 1 LCD801

R01

R131, R203, R237, R307, R402

38 SW TACT SKTS-1102A SEKWANG SEKWANG MAN 8 8

39 SW SLIIDE SKS-22021T SEKWANG SEKWANG MAN 3 3 SW101, SW102, SW201

40 RESONATOR 4.0MHz ZTA4.00MG D.TRON D.TRON MAN 1 1 X801

MAIN BODY ASS'Y

42 CONNECTOR CH-239(A)-M SAMWOO MAN 1 1 J701 ECO041215-01

43 TRANSISTOR KTA1658 KEC MAN 1 1 Q911

44 TRANSISTOR 2SC2078 SANYO YANG WON MAN 1 1 Q704

45 IC KIA7217AP KEC MAN 1 1 IC201

46 POWER CODE 2PIN PLUG ASS'Y FINE FINE MAN 1 1 J900

MAIN PCB AUTO ASS'Y

47 PCB MAIN FR-4 / R-1 MULTI SMD 1 1 ECO050809-02

48 CHIP RESISTOR 0 1/16W 5% T 1608 PHILIPS SMD 3 3 R108, R137, R201 ECO050328-01

48 CHIP RESISTOR 1 1/16W 5% T 1608 PHILIPS SMD 1 1 R706

49 CHIP RESISTOR 10 1/16W 5% T 1608 PHILIPS SMD 2 2 R133, R301

50 CHIP RESISTOR 100 1/16W 5% T 1608 PHILIPS SMD 6 6 R104, R109, R134, R168, R314, R401

51 CHIP RESISTOR 1K 1/16W 5% T 1608 PHILIPS SMD 19 19

52 CHIP RESISTOR 10K 1/16W 5% T 1608 PHILIPS SMD 16 16

53 CHIP RESISTOR 100K 1/16W 5% T 1608 PHILIPS SMD 9 9

54 CHIP RESISTOR 2M 1/16W 5% T 1608 PHILIPS SMD 1 1 R405

55 CHIP RESISTOR 1.2K 1/16W 5% T 1608 PHILIPS SMD 1 1 R181

56 CHIP RESISTOR 1.5K 1/16W 5% T 1608 PHILIPS SMD 2 2 R742, R924

57 CHIP RESISTOR 15K 1/16W 5% T 1608 PHILIPS SMD 3 3 R155, R166, R235

58 CHIP RESISTOR 150K 1/16W 5% T 1608 PHILIPS SMD 1 1 R701

59 CHIP RESISTOR 2.2 1/16W 5% T 1608 PHILIPS SMD 1 1 R711

60 CHIP RESISTOR 220 1/16W 5% T 1608 PHILIPS SMD 2 2 R169, R702

61 CHIP RESISTOR 2.2K 1/16W 5% T 1608 PHILIPS SMD 13 13

62 CHIP RESISTOR 22K 1/16W 5% T 1608 PHILIPS SMD 7 7

63 CHIP RESISTOR 220K 1/16W 5% T 1608 PHILIPS SMD 2 2 R171, R177

64 CHIP RESISTOR 2.2M 1/16W 5% T 1608 SMD 1 1 R153

65 CHIP RESISTOR 2.7K 1/16W 5% T 1608 PHILIPS SMD 1 1 R167

66 CHIP RESISTOR 27K 1/16W 5% T 1608 PHILIPS SMD 2 2 R102, R403

67 CHIP RESISTOR 33 1/16W 5% T 1608 PHILIPS SMD 1 1 R204 ECO050422-01

68 CHIP RESISTOR 33K 1/16W 5% T 1608 PHILIPS SMD 2 2 R404, R407

69 CHIP RESISTOR 3.3M 1/16W 5% T 1608 PHILIPS SMD 1 1 R135

70 CHIP RESISTOR 390 1/16W 5% T 1608 PHILIPS SMD 1 1 R156

71 CHIP RESISTOR 39K 1/16W 5% T 1608 PHILIPS SMD 2 2 R163, R306

72 CHIP RESISTOR 47 1/16W 5% T 1608 PHILIPS SMD 3 3 R184, R705, R913

SW801, SW802, SW803, SW804, SW805,
SW806, SW807, SW808

R126, R164, R182, R183, R187, R200,
R222, R234, R238, R308, R312, R410,
R501, R571, R572, R955, R956, R957,
R958

R123, R157, R161, R185, R315, R321,
R322, R323, R324, R412, R413, R414,
R703, R821, R823, R914

R140, R142, R159, R186, R188, R202,
R233, R309, R311

,

R817, R822, R912, R922, R923, R961,

R132, R162, R172, R175, R302, R304,
R305

,

ECO050408-02

ECO050418-02
ECO050715-01

ECO050422-01
ECO050715-01

ECO050408-02

73 CHIP RESISTOR 470 1/16W 5% T 1608 PHILIPS SMD 6 6 R101, R105, R106, R165, R236, R931

C93

74 CHIP RESISTOR 4.7K 1/16W 5% T 1608 PHILIPS SMD 7 7

75 CHIP RESISTOR 47K 1/16W 5% T 1608 PHILIPS SMD 9 9

76 CHIP RESISTOR 470K 1/16W 5% T 1608 PHILIPS SMD 2 2 R154, R573

77 CHIP RESISTOR 5.6K 1/16W 5% T 1608 PHILIPS SMD 1 1 R408

78 CHIP RESISTOR 56K 1/16W 5% T 1608 PHILIPS SMD 2 2 R103, R313

79 CHIP RESISTOR 6.8K 1/16W 5% T 1608 PHILIPS SMD 1 1 R152

80 CHIP RESISTOR 68K 1/16W 5% T 1608 PHILIPS SMD 1 1 R189

81 CHIP RESISTOR 82K 1/16W 5% T 1608 PHILIPS SMD 1 1 R173

82 THERMISTOR 100 OHM NCP18XF101J03RB MURATA SMD 1 1 TH131

83 THERMISTOR 10K OHM NCP18XH103J03RB MURATA SMD 1 1 TH101 ECO041215-01

84 CHIP CERAMIC 0.001UF 1608 PHILIPS/SAMSUNG SMD 4 4 C181, C230, C239, C404 ECO050422-01

85 CHIP CERAMIC 0.01UF 1608 PHILIPS/SAMSUNG SMD 37 37

86 CHIP CERAMIC 0.1UF 1608 PHILIPS/SAMSUNG SMD 22 22

87 CHIP CERAMIC 1UF 1608 PHILIPS/SAMSUNG SMD 5 5 C159, C401, C402, C961, C962

88 CHIP CERAMIC 0.022UF 1608 PHILIPS/SAMSUNG SMD 5 5 C166, C203, C214, C238, C403

89 CHIP CERAMIC 0.047UF 1608 PHILIPS/SAMSUNG SMD 8 8

90 CHIP CERAMIC 0.068UF 1608 PHILIPS/SAMSUNG SMD 1 1 C410

91 CHIP CERAMIC 10PF 1608 PHILIPS/SAMSUNG SMD 3 3 C96, C113, C324

92 CHIP CERAMIC 100PF 1608 PHILIPS/SAMSUNG SMD 11 11

93 CHIP CERAMIC 150PF 1608 PHILIPS/SAMSUNG SMD 4 4 C102, C104, C106, C311

94 CHIP CERAMIC 16PF 1608 PHILIPS/SAMSUNG SMD 1 1 C316

95 CHIP CERAMIC 18PF 1608 PHILIPS/SAMSUNG SMD 2 2 C112, C119

96 CHIP CERAMIC 180PF 1608 PHILIPS/SAMSUNG SMD 2 2 C701, C734

97 CHIP CERAMIC 2PF 1608 PHILIPS/SAMSUNG SMD 1 1 C730

98 CHIP CERAMIC 22PF 1608 PHILIPS/SAMSUNG SMD 2 2 C312, C727

99 CHIP CERAMIC 220PF 1608 PHILIPS/SAMSUNG SMD 6 6 C204, C211, C329, C717, C719, C724 ECO050422-01

100 CHIP CERAMIC 3PF 1608 PHILIPS/SAMSUNG SMD 1 1 C319

101 CHIP CERAMIC 30PF 1608 PHILIPS/SAMSUNG SMD 1 1 C315

102 CHIP CERAMIC 33PF 1608 PHILIPS/SAMSUNG SMD 3 3 C108, C302, C318

103 CHIP CERAMIC 330PF 1608 PHILIPS/SAMSUNG SMD 6 6 C714, C715, C723, C725, C726, C729

104 CHIP CERAMIC 39PF 1608 PHILIPS/SAMSUNG SMD 1 1 C705

105 CHIP CERAMIC 9PF 1608 PHILIPS/SAMSUNG SMD 1 1 C110

106 CHIP CERAMIC 47PF 1608 PHILIPS/SAMSUNG SMD 7 7

107 CHIP CERAMIC 470PF 1608 PHILIPS/SAMSUNG SMD 1 1 C718

108 CHIP CERAMIC 56PF 1608 PHILIPS/SAMSUNG SMD 1 1 C130

R138, R223, R406, R704, R915, R916,
R962

R122, R139, R174, R176, R300, R303,
R409, R411, R415

C111, C114, C115, C116, C117, C118,
C153, C154, C156, C157, C161, C162,
C183, C184, C201, C231, C234, C235,
C323, C412, C415, C501, C502, C503,
C504, C506, C703, C704, C708, C713,
C901, C902, C903, C911, C922, C924,

2
C122, C123, C132, C134, C135, C137,
C138, C168, C169, C180, C186, C205,
C229, C236, C308, C322, C325, C330,
C405, C413, C571, C573

C152, C163, C164, C165, C212, C310,
C721, C914

C101, C109, C303, C304, C305, C313,
C314, C711, C712, C731 , C733

C103, C105, C107, C182, C328, C720,
C722

ECO050408-02
ECO050418-02

ECO050715-01
ECO050715-04

ECO041215-01
ECO050525-02

ECO050715-01

ECO050812-01

109 CHIP CERAMIC 6PF 1608 PHILIPS/SAMSUNG SMD 2 2 C317, C321

110 CHIP CERAMIC 68PF 1608 PHILIPS/SAMSUNG SMD 3 3 C97,C131, C732

111 CHIP CERAMIC 680PF 1608 PHILIPS/SAMSUNG SMD 1 1 C414

112 CHIP CERAMIC 82PF 1608 PHILIPS/SAMSUNG SMD 2 2 C406, C707

113 CHIP CERAMIC 8PF 1608 PHILIPS/SAMSUNG SMD 1 1 C326

114 CHIP TANTAL 2.2uF/16V A TYPE SMD 1 1 C301 ECO050418-02

115 CHIP TRANSISTOR KTK211 SOT-23 KEC SMD 2 2 Q102, Q103

116 CHIP TRANSISTOR KRA102S SOT-23 KEC SMD 1 1 Q163

117 CHIP TRANSISTOR KRC101S SOT-23 KEC SMD 10 10

118 CHIP TRANSISTOR KRC102S SOT-23 KEC SMD 1 1 Q914

119 CHIP TRANSISTOR KRC110S SOT-23 KEC SMD 3 3 Q121, Q960, Q961 ECO050715-01

120 CHIP TRANSISTOR KRC111S SOT-23 KEC SMD 4 4 Q202,Q502, Q962, Q963 ECO050408-02

121 CHIP TRANSISTOR KRC112S SOT-23 KEC SMD 5 5 Q122, Q152, Q154, Q913, Q922

122 CHIP TRANSISTOR KTA1504S SOT-23 KEC SMD 4 4 Q164, Q233, Q912, Q924

123 CHIP TRANSISTOR KTC3875S SOT-23 KEC SMD 9 9

124 CHIP TRANSISTOR KTC3880S SOT-23 KEC SMD 8 8

125 DIODE ZENER Z02W5.1V SOT-23 KEC SMD 1 1 DZ181

126 DIODE ZENER Z02W5.6V SOT-23 KEC SMD 1 1 DZ931

127 DIODE ZENER Z02W8.2V SOT-23 KEC SMD 1 1 DZ921

128 DIODE SI CHIP KDS181 SOT-23 KEC SMD 1 1 D401

129 DIODE SI CHIP KDS184 SOT-23 KEC SMD 14 14

130 DIODE SI CHIP KDS226 SOT-23 KEC SMD 1 1 D101

131 DIODE VARICAP KDV251S SOT-23 KEC SMD 2 2 D301, D302

132 IC PLL LC7152NM SANYO YANG WON SMD 1 1 IC301

133 IC OP AMP KIA358F KEC SMD 1 1 IC102

134 IC OP AMP KIA4558F KEC SMD 1 1 IC401

135 IC FM IF TK14489V TOKO SMD 1 1 IC101

Q104, Q105, Q153, Q222, Q305, Q311,
Q312, Q313, Q953, Q954

Q151, Q181, Q182, Q183, Q234, Q742,
Q921, Q923, Q931

Q101, Q161, Q162, Q301, Q302, Q303,
Q701, Q702

D102, D103, D105, D171, D180, D181,
D233, D571, D572, D741, D742, D921,
D961, D962

ECO050408-02

ECO050408-02

MAIN PCB MANUAL ASS'Y

135 FILM RESISTOR 2.2 1/2W 5% ST MINI MAN 1 1 R712

136 FILM RESISTOR 10 1/2W 5% ST MINI MAN 1 1 R921

137 FILM RESISTOR 470 1/2W 5% ST MINI MAN 2 2 R951, R954 ECO050418-02

138 FILM RESISTOR 4.7K 1/2W 5% ST MINI MAN 1 1 R713

139 FILM RESISTOR 1K 1W 5% ST MINI MAN 2 2 R952, R953 ECO050418-02

140 METAL OXID RESISTOR 10 2W 5% ST BULK MAN 1 1 R208

141 RESISTOR SEMI 100KB PH0630NOX0X-HA1-B104 SOUNDWELL MAN 2 2 RV571, RV572

142 RESISTOR SEMI 2.2KB PH0630NOX0X-HA1-B222 SOUNDWELL MAN 1 1 RV231

143 RESISTOR SEMI 22KB PH0630NOX0X-HA1-B223 SOUNDWELL MAN 1 1 RV401

144 RESISTOR SEMI 4.7KB PH0630NOX0X-HA1-B472 SOUNDWELL MAN 2 2 RV131, RV911

145 ELECT CAPACITOR 1UF KR1-16V010MA 5X11 DONGXIANG MAN 3 3 C167, C407, C408

146 ELECT CAPACITOR 10UF KR1-16V100MA 5X11 DONGXIANG MAN 8 8

147 ELECT CAPACITOR 100UF KR3-16V101MA 5X11 DONGXIANG MAN 2 2 C821, C923

148 ELECT CAPACITOR 1000UF KR1-16V102MF 10X20 DONGXIANG MAN 4 4 C207, C213, C217, C912

C232, C331, C332, C333, C913, C921,
C931 ,C964

ECO050328-01

149 ELECT CAPACITOR 0.22UF KR1-16VR22MA 5X11 DONGXIANG MAN 1 1 C124

150 ELECT CAPACITOR 2.2UF KR1-16V2R2MA 5X11 DONGXIANG MAN 1 1 C741

151 ELECT CAPACITOR 22UF KR1-16V220MA 5X11 DONGXIANG MAN 1 1 C221 ECO050408-02

152 ELECT CAPACITOR 220UF KR1-16V221MA 5X11 DONGXIANG MAN 3 3 C210, C953, C954

153 ELECT CAPACITOR 33UF KR1-16V330MA 5X11 DONGXIANG MAN 1 1 C209

154 ELECT CAPACITOR 4.7UF KR1-16V4R7MA 5X11 DONGXIANG MAN 4 4 C208, C411, C960 , C963 ECO050328-01

155 ELECT CAPACITOR 47UF KR1-16V470MA 5X11 DONGXIANG MAN 5 5 C143, C185, C206, C233, C933

156 DISK 100P 1 1 C735

157 DIP TRIMMER 20PF KCVN620 FOKITS MAN 1 1 CT301 ECO050325-04

158 TRANSFORMER CHOKE T1 FINE FINE MAN 1 1 T901 ECO050509-02

159 TRANSFORMER EI-24(MOD.) T2 FINE FINE MAN 1 1 T201 ECO050509-02

160 IFT COIL RF FREE TX 27MHz TX1 FINE FINE MAN 2 2 L701, L702

161 IFT COIL 37MHz TX TX2 FINE FINE MAN 1 1 L703

162 IFT COIL 27MHz-B RX1 FINE FINE MAN 1 1 L101

163 IFT COIL 27MHz RX (7RC) RX2 FINE FINE MAN 1 1 L107

164 IFT COIL 10.7MHz RX-B RX3 FINE FINE MAN 1 1 L108

165 IFT COIL DETECTOR 455KHz RX4 FINE FINE MAN 1 1 L109

166 IFT COIL 455KHz-B RX5 FINE FINE MAN 1 1 L112

167 IFT COIL 16.5MHz VCO VCO1 FINE FINE MAN 1 1 L301

168 IFT COIL 15MHz TX/RX VCO2 FINE FINE MAN 1 1 L302

169 COIL AXIAL 1.5UH LAL03TR1R5K MAN 2 2 L102, L106

170 COIL AXIAL 6.8UH LAL03TB6R8K MAN 1 1 L706

171 COIL SPRING 2.5X0.8X7T:R 0.11UH FINE FINE MAN 1 1 L704

172 COIL SPRING 4X0.5X6T:R FINE FINE MAN 1 1 L712

173 COIL SPRING 4X0.5X7T:R FINE FINE MAN 1 1 L713

174 COIL SPRING 4X0.5X10T:R FINE FINE MAN 1 1 L714

175 COIL SPRING 6X0.8X5T:R 0.225UH FINE FINE MAN 1 1 L711

176 COIL SPRING 5X0.6X13.5T:R 0.5UH FINE FINE MAN 1 1 L707

177 CORE SPRING 5.5TX0.45XM5E®X2.3 0.17UH FINE FINE MAN 3 3 L103, L104, L105

178 COIL CHOKE 6UH BOBBIN CORE FINE FINE MAN 1 1 L201

179 TRANSISTOR KTC1006 KEC MAN 1 1 Q703

180 TRANSISTOR KTA1241 KEC MAN 3 3 Q221, Q951, Q952 ECO050408-02

181 DIODE 1N4004T/R 400V 1A MAN 2 2 D232, D901

182 DIODE 1N60 PYUNGCHANG MAN 1 1 D161

183 CRYSTAL 10.240MHz 32PF:30PPM HC-49/U D.TRON MAN 1 1 X101

184 CRYSTAL 4.50MHZ 12PF:30PPM HC-49U D.TRON MAN 1 1 X301

185 FILTER CRYSTAL 10L08A 10.695MHZ 49/T-3L D.TRON MAN 1 1 XF101

186 FILTER CERAMIC LT455HTW D.TRON MAN 1 1 CF101 ECO050525-02

187 JACK MINI SKJS-206 SEKWANG SEKWANG MAN 1 1 J203

188 JACK DC SKJS-3518 SEKWANG SEKWANG MAN 2 2 J201, J202

189 WAFER 2PIN PH-2A 180C FINE FINE MAN 1 1 J205

190 WAFER 6PIN PH-6A 180C FINE FINE MAN 1 1 J503

191 WAFER 16PIN PH-16A 180C FINE FINE MAN 1 1 J102

192 SW ROTARY SJ-PS2101 20SK SEJIN SEJIN MAN 1 1 SW812 ECO041217-03

Mechanical PARTS
* COVER ASS'Y

1 ESCUTCHEON ABS (SILVER SPRAY) Bonso 1 Front case plastic

ESCUTCHEON ABS (BLACK SPRAY) 1

2 WINDOW ACRYL Bonso 1 1 -

0

.

g

3 VOL KNOB ABS (SILVER SPRAY) Bonso 2 For Vol & Ch

VOL KNOB ABS (BLACK COLOR) 2

4 SQ KNOB ABS (SILVER SPRAY) Bonso 4 For Sq, Rf, Mic gian, Q up/down

SQ KNOB ABS (BLACK COLOR) 4

5 ILLUMINATOR(VOL) ACRYL, CLEAR Bonso 1 1 For Vol

6 ILLUMINATOR(CH) ACRYL, CLEAR Bonso 1 1 For Ch

7 ILLUMINATOR(SQ) ACRYL, CLEAR Bonso 4 4 For Sq, Rf, Mic gian, Q up/down

8 ILLUMINATOR(PA) ACRYL, CLEAR Bonso 1 1 For Pa/off/dx

9 KEY PAD 6 SILICONE, Hs=60, PU Coating ECO 050328-06 Hankyung 1 1 -

10 KEY PAD 2 SILICONE, Hs=60, PU Coating ECO 050328-06 Hankyung 1 1 -

11 RING NUT BsBm, Ni plating Hankyung 6 6 For Vol

12 SCREW MACH(+) M2.6*5L, NATURAL, FH Bonso 4 4 Escutcheon + Main body mounting

13 Vol illuminator sticker wood free paper, 58*7*

ECO 050328-02 Bonso 1 1 For Vol

14 Sq illuminator sticker wood free paper, 46*7*0 ECO 050328-02 Bonso 5 5 For Sq illuminator & Ch illuminator

* UPPER COVER ASS'Y

15 UPPER COVER SPC+BLACK coating Hankyung 1 1 -

16 FELT(COVER) 8*146*0.3t, BLACK Hankyung 2 2 For upper cover adhesive(location: side)

17 CUSHION 20*24*4.0t, EVA SPONGE, BLACK Hankyung 1 1 For upper cover adhesive(location: center)

18 SCREW Mach(+) M3*8L-TAPTITE, BLACK, B ECO 050103-01 Bonso 5 5 Upper cover + Main body mounting

* BOTTOM COVER ASS'Y

19 BOTTOM COVER SPC+BLACK coating Hankyung 1 1 -

20 BRACKET(SPK) SPC, 1.6t Hankyung 3 3 For speaker

21 FELT(SPK) Φ76*0.2t, BLACK Hankyung 1 1 For speaker

22 FELT(COVER) 8*146*0.3t, BLACK Hankyung 2 2 For bottom cover adhesive(location: side)

23 SCREW Mach(+) M3*8L-TAPTITE, BLACK, B ECO 050319-01 same as item.18 Bonso 3 3 Bracket(spk) mounting

24 SCREW Mach(+) M3*8L-TAPTITE, BLACK, B ECO 050103-01 same as item.18 Bonso 1 1

Bottom cover + Main body mounting(location: back)

* FRONT PCB ASS'Y

25 REFLECTOR(HOLDER) ACRYL Bonso 1 1 For diffuser

26 DIFFUSER ACRYL, 45.8*19.3*2.4t Bonso 1 1 For diffuser

27 LCD HOUSING SPTE, 0.3t Hankyung 1 1 For diffuser

28 WHITE SHEET Hankyung 1 1 For diffuser

29 ZEBRA 30*9.2*2.0t, CARBON SILICONE Hankyung 1 1 For diffuser

30 FELT(S/W) Φ4.5*Φ17*0.3t, BLACK ECO 050103-01 Hankyung 3 3 -

31 SCREW Mach(+) M2.6*8L-TAPTITE, Ni platin

ECO 050103-01 Bonso 2 2 Front Pcb mounting

* MAIN PCB ASS'Y

32 MAIN BODY EGI, 1.0t Hankyung 1 1 -

33 HEAT SINK AL, 2.0t Hankyung 1 1 -

34 TX SHIELD CAN(1) SPTE, 0.3t Hankyung 1 1 For Main PCB(location: lower)

35 TX SHIELD CAN(2) SPTE, 0.3t Hankyung 1 1 For Main PCB(location: upper)

36 VCO SHIELD CAN SPTE, 0.3t Hankyung 1 1 For Vco

37 SHIELD COVER SPTE, 0.3t ECO 050302-02 Hankyung 1 1 For TX shield can(2)

38 BUSH NYLON66+GRASS 15% Hankyung 1 1 For TR

39 ANT. TERMINAL SPTE, 0.2t Hankyung 1 1 For Antenna

40 MICA MICA, 0.6t Hankyung 1 1 For TR

41 SCREW Mach(+) 3*8L-TAPTITE, Black, BH ECO 050103-01 same as item.18 Bonso 4 4 Main PCB + Main body mounting

42 SCREW MACH(+) M3*10L, Black, BH ECO 050412-02 Bonso 3 3 TR mounting

43 SPRING WASHER M3 Bonso 3 3 TR mounting

44 NUT M3, SS41 Bonso 3 3 TR mounting

45 CORD STOPPER PP Hankyung 1 1 Wire stopper

46 Cu Tape-1 Cu 63.6*9*0.1t ECO 050328-02 Bonso 1 1 For TX shield can(1)

47 Cu Tape-2 Cu 77*15*0.1t ECO 050328-02 Bonso 1 1 For TX shield can(1)

* ACCESSORY

1 MIC ASS'Y Hankyung 1 1

2 BRACKET SET ECO 050103-01 Hankyung 1 1

3

STUD BOLT ABS, M6*8L, BLACK

4

BRACKET(MIC) SUS304, 1.0t

5

PACKING RUBBER PACKING RUBBER

6

SCREW Mach(+) M3*8L, Taptite, Black, BH

7

SCREW TAP(+) 5*12L-1S, ZN PLATING, TH

8

STAR WASHER-S M3, NI PLATING, B type

9

STAR WASHER-L M5, NI PLATING, B type

10 POWER CODE

2PIN RECEPRACLE ASS'Y FINE 1 1

Hankyung

Hankyung

Hankyung

Bonso

Bonso

Bonso

Bonso

2
1
2
2
33
22
33

* PACKING ASS'Y

1 OWNER'S MANUAL BONSO 1 1

2 GIFTBOX SW1E 2.0T BONSO 1 1

3 INNER BOX A SW1E 2.0T, WHITE for RADIO BONSO 1 1

4 INNER BOX B SW1E 2.0T, WHITE for ACCESSORY BONSO 1 1

5 WARNING LABEL BONSO 1 1

6 CODE 39 SERIAL NO. STICKER BONSO 2 2

7 OUT BOX DW1E 7.0T BONSO 1 1

8 SILICA-GEL 1g BONSO 1 1

9 OPP TAPE 50MM BONSO 1 1

10 COLOR TYPE STICKER S for SILVER UNIT BONSO 1

COLOR TYPE STICKER B for BLACK UNIT BONSO 1

11 POLY BAG for RADIO 220*300mm BONSO 1 1

12 POLY BAG for ACCESSORY 80*100mm BONSO 2 2

13 POLY BAG for POWER CODE 50*200mm BONSO 1 1

2

1

2

2

SECTION4 MECHANICAL DISASSEMBLY

46

34

58

40

15

x2

43

47

49

43

37

41

6

x4

x3

x2

44

11

8

5

x4

42

x3

7

5

43

x2

37

x2

25

x2

24

10

9

x6

46

x2

x4

20

30

1

x2

38

33

32

43

31

x3

54

12

39

13

16

45

4

48

57

29

56

55

53

14

18

x3

19

50

35

17

27

26

21

28

20

51

23

52

22

3

36

20

2

x3

Upper cover

1
2

Bottom cover

3

Bracket (Set)

4

Escutcheon

5

Vol knob

6

Sp knob

7

illuminator (vol)

8

illuminator (sq)

9

Ring nut

10

Nut for Mic connector

11

Washer for Mic connector

12

Key pad-6

13

Key pad-2

14

Felt (s/w)

15

Screw Mach (+)

16

Window

17

Main body

18

Speaker

19

Bracket (spk)

20

Felt (cover)

21

Felt (spk)

22

TX shield can (2)

23

Shield cover

24

Stud bolt

25

Packing rubber

26

TX shield can (1)

27

VCO shield can

28

Main PCB

29

Front PCB

30

Screw Mach(+)

31

Washer for Ant connector

32

Nut for Ant connector

33

Ant terminal

34

Mica

35

Cushion

36

Screw Mach(+)

37

Screw Mach(+)

38

Cord stopper

39

LCD Bracket

40

Bush

41

Spring washer

42

Nut

43

Screw Tap (+)

44

illuminator (ch)

45

illuminator (pa)

46

Screw Mach(+)

47

Heat sink

48

Mic connector

49

Ant connector

50

S/W PCB

51

Cu tape-1

52

Cu tape-2

53

Zebra

54

White sheet

55

Diffuser Lens

56

Reflector

57

LCD

58

TR

SPC 0.8t
SPC 0.8t
SPC 1.6t
ABS
ABS
ABS
Acryl
Acryl
BsBm

Silicone
Silicone

0.3t
M2.6x8L_taptite,BH
Acryl
EGI 1.0t

SPC 1.6t

0.3t

0.3t
SPTE 0.3t
SPTE 0.3t
ABS

SPTE 0.3t
SPTE 0.3t

M3x8L_taptite,BH

SPTE 0.2t

0.4t
EVA sponge
M3x8L_taptite,BH
M2.6x5L,FH
PVC
SPTE 0.3t
Nylon66+Grass15%
M3
M3
M3x8L_taptite,BH
Acryl
Acryl
M3x10L,BH
AL

Silicone
PE, 0.1t
Acryl
Acryl

1
1
1
1
2
4
1
4
6
1
1
1
1
3

For front pcb

2
1
1
1
3
4
1
1
1
2
2
1
1
1
1

For front pcb

4
1
1
1
1
1

For speaker

3

For escutcheon

4
1
1

For TR

1

For TR

3

For TR

3

For cover

6
1
1

For TR

1

For TR

3
1
1
1
1
1
1
1
1
1
1
1

REMARKNO PART NAME DESCRIPTION QTY

SECTION5 BOARD LAYOUT

5-1 Main PCB (Top side)

Main PCB (Bottom side)

5-2 Front PCB (Top side)

Front PCB (Bottom side)

5-3 LED PCB (Top side)

LED PCB (Bottom side)

5-4 Volume PCB

5-5 MIC PCB

SECTION6 BLOCK DIAGRAM

SECTION7 SCHEMATIC