Kenwood TK-7102H PCB Section, Test Frequency (MHz)

TK-7102H

31

ADJUSTMENT

PCB Section

1.Setting 1)Power supply voltage

DC Power supply terminal : 13.6V

2.VCO lock 1)CH : TX high Digital voltmeter CV TC402 5.5V ±0.1V

voltage*

2)CH : RX high TC401 5.5V ±0.1V

3)CH : TX low Check 0.7V or more

4)CH : RX low

3.IF coil 1)CH : RX center (Wide) SSG AFV L301 3.25~3.35V (DC)

2)SSG output : –53dBm (501µV) Digital voltmeter

Mod : 1kHz

Dev : 3kHz

4.RF 1)CH : RX center (Wide) Tra generator ANT TC351 Adjust the BPF waveform

bandpass CH : RX low (Wide) Spectrum analyzer BPF TC352 to Fig. 1

filter CH : RX high (Wide)

2)Tra generator output : –30dBm

Connect the spectrum analyzer

to BPF terminal

* Adjustment of TX VCO lock voltage

1. Remove R516, F501, R518 and R524 (all on component side).

2. Remove PCB from chassis.

3. Transmit and check voltage at [CV] point.

Warning : Do not transmit if step “1.” is not complete.

4. Adjust of voltage can be done by tuning TC402.

Item Condition Test equipment

Terminal

Parts Method

Specifications/

Remarks

Measurement Adjustment

Fig. 1

Test Frequency (MHz)

Channel K,M K2,M2

TX RX TX RX

1 : Center 160.100 160.050 149.100 149.050

2 : Low 146.100 146.050 136.100 136.050

3 : High 173.900 173.950 161.900 161.950

4160.000 160.000 149.000 149.000

5160.200 160.200 149.200 149.200

6160.400 160.400 149.400 149.400

K2,M2

K,M

Contents

Main TK-7102H SERVICE MANUAL CONTENTS REVISED TK-7102H GENERAL INTRODUCTION SCOPE OF THIS MANUAL ORDERING REPLACEMENT PARTS GENERAL / SYSTEM SET-UP SYSTEM SET-UP 1-5. Rear panel 1. Controls and Functions 1-4. Display o 1-2. Microphone 1-1. Front Panel 2. Operation Features 3. Transceiver Controls and Indicators 4. Scan Operating SCAN start condition Scan stop condition Revert channel Scan end TK-7102H SP Unmute Auto Reset Stun 7. Audible User Feedback Tones REALIGNMENT 1. Modes 2. How to Enter Each Mode 3. PC Mode 3-1. Preface REALIGNMENT 5. Accessory Connection Cable (KCT-39) 5-1. Installing the KCT-39 in the Transceiver Fig. 3 TK-7102H ) into the chassis ( Fig. 7 Accessory Port Function Fig. 6 REALIGNMENT / INSTALLATION 6-3. Modifying the Transceiver Fig. 2 R267 Fig. 8 INSTALLATION Fig. 4 Fig. 3 Setting With the KPG-70D Select External Devices from the Edit menu and set the Scrambler. DISASSEMBLY FOR REPAIR Frequency Configuration Fig. 1 Frequency configuration Fig. 2 Receiver system Receiver System Front-end RF Amplifier CIRCUIT DESCRIPTION Wide/Narrow Changeover Circuit Fig. 6 PLL circuit Fig. 4 AF signal system AF Signal System Transmitter System Outline Power Amplifier Circuit APC Circuit Control Circuit Memory Circuit Fig. 14 Encodet Fig. 13 Key matrix circuit Fig. 12 Display circuit CIRCUIT DESCRIPTION / SEMICONDUCTOR DATA SEMICONDUCTOR DATA Drive Amplifier : PD55003TR (TX-RX Unit Q503) Absolute Maximum Ratings (TCASE = 25C) SEMICONDUCTOR DATA Microprocessor : 30622MAA-B83GP (TX-RX Unit IC101) Terminal Function COMPONENTS DESCRIPTION Display Unit (X54-3460-20) TX-RX Unit (X57-6700-XX) TK-7102H TX-RX UNIT (X57-6700-XX) -22 : M -23 : M2 -24 : K -25 : K2 DISPLAY UNIT (X54-3460-20) Page Page Page Page Page EXPLODED VIEW PACKING Parts with the exploded numbers larger than 700 are not supplied. Test Equipment Required for Alignment Tuning cable (E30-3383-05) MIC connector (Front view) Test cable for microphone input (E30-3360-08) Adjustment Location Switch Part name label face down Fuse Locator PCB Section * Adjustment of TX VCO lock voltage K,M K2,M2 Test Frequency (MHz) Receiver Section Transmitter Section If normal power is not obtained, please follow the step below TERMINAL FUNCTION CN2 Function Port Assignment CN3 CN4 PC BOARD TK-7102H DISPLAY UNIT (X54-3460-20) Component side view (J72-0916-09) DISPLAY UNIT (X54-3460-20) Foil side view (J72-0916-09) ABCDEFGHIJ KLM NOPQRS TK-7102H 37 38 S RQP O NMLK J IHGF PC BOARD TK-7102H 39 40 ABCDEFGHIJ KLM NOPQRS Ref. No. TK-7102H 41 42 46 1 * SCHEMATIC DIAGRAM TK-7102H Note : The components marked with a dot () are parts of layer 1. X57-6700-XX TX-RX UNIT X54-3460-20 DISPLAY UNIT M P TK-7102H TK-7102 H 47 48 BLOCK DIAGRAM TX-RX UNIT (X57-670x-xx) DISPLAY UNIT (X54-3460-20) TK-7102H TK-7102H 49 50 LEVEL DIAGRAM Transmitter Section 4 SPECIFICATIONS 51 GENERAL RECEIVER TRANSMITTER KENWOOD CORPORATION