Kenwood TK-285 User manual

VHF FM TRANSCEIVER
TK-285/(N)
©2000-6 PRINTED IN JAPAN
B51-8530-00(S) 847
SERVICEMANUAL
GENERAL ................................................................................. 2
SYSTEM SET-UP ..................................................................... 2
OPERATING FEATURES......................................................... 3
REALIGNMENT ........................................................................ 4
CIRCUIT DESCRIPTION .......................................................... 6
SEMICONDUCTOR DATA ..................................................... 11
DESCRIPTION OF COMPONENTS....................................... 13
PARTS LIST............................................................................ 14
EXPLODED VIEW .................................................................. 22
PACKING ................................................................................ 23
ADJUSTMENT........................................................................ 24
TERMINAL FUNCTION .......................................................... 32
PC BOARD VIEWS
DISPLAY UNIT (X54-3210-13) ............................................ 33
TX-RX UNIT (X57-619X-XX) ............................................... 39
SCHEMATIC DIAGRAM ......................................................... 45
BLOCK DIAGRAM .................................................................. 49
LEVEL DIAGRAM ................................................................... 51
OPTIONS ................................................................................ 52
SPECIFICATIONS ...............................................BACK COVER
CONTENTS
CAUTION
When using an external power connector, please use
with maximum final module protection of 9V.
Photo is K type
Knob (ENC)
(K29-5232-03)
Knob (VOL)
(K29-5231-03)
Cabinet assy
(A02-2055-53)
(16 keys)
Badge
(B43-1106-14)
Packing
(G53-0896-02)
(16 keys)
Panel assy
(A62-0535-04)
Helical antenna
(T90-0733-05):K, E
(T90-0734-05):(N)M
Knob (PTT etc)
(K29-5157-03)
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ABCDE FGH I OPQRS
1
3
4
5
6
7
8
9
10
11
12
13
14
2
33 34
TK-285/(N)
DISPLAY UNIT (X54-3210-13) Component Side View
Component side
Foil side
Pattern 1
Pattern 2
Pattern 3
Pattern 4
DISPLAY UNIT
(X54-3210-13)
PC BOARD VIEW
S301
MON S302 PTT S303 LAMP
CN302
C329 C330
D305
D306
C3
2
1
6
5
4
9
8
7
#
0
∗
B
A
S
D307
D308
D309D310
C337
C338
MIC
LCD ASSY
X54-3210-13 (A/2)
J72-0517-22
X54-3210-13 (B/2)
J72-0517-22
+
–
C317 C316
SP+ 1
SP– 2
C336
D301
.oN.feRsserddA
103DC9
503DL8
603DL6
703DN8
803DN6
903DQ8
013DQ6
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TK-285/(N)
General
Frequency Range
RX, TX..............................................................................K, E : 217 to 250MHz (RX) 218 to 250MHz (TX)
(N)M : 240 to 270MHz (TX, RX)
Channel Spacing..............................................................12.5kHz (PLL channel stepping, 6.25kHz)
Battery Voltage.................................................................DC 7.5V ±20%
Battery Life (Conventional Mode).....................................More than 8 hours at 5-5-90 duty cycle with KNB-16A battery
More than 10 hours at 5-5-90 duty cycle with KNB-17A battery
Temprature Range ...........................................................–30˚C to +60˚C (-22˚F to + 140˚F)
Dimension and Weight
With KNB-16A (1100mAh battery) ................................5.33” (135mm) H x 2.29” (58mm) W x 1.34” (34mm) D 1.01lbs (460g)
(Dimensions not including Protrusions, Weight includes antenna and belt hook)
Receiver(Measurements made per TIA/EIA-603, ETS)
RF Input Impedance.........................................................50Ω
Sensitivity
12dB SINAD .................................................................. 0.28µV
Selectivity .........................................................................63dB (EIA), 63dB (ETS)
ntermodulation ................................................................65dB (EIA), 65dB (ETS)
Spurious (Except for IF 1/2) .............................................70dB
Frequency Stability...........................................................±0.00025% (-30˚C to +60˚C)
Channel Spread ...............................................................33MHz : K, E
30MHz : (N)M
Audio Power Output .........................................................500mW at 16Ωless than 5% distortion
Transmitter(Measurements made per TIA/EIA-603,ETS)
RF Power Output
Hi ...................................................................................5W
Low................................................................................1W
RF Output Impedance......................................................50Ω
Spurious ...........................................................................-70dB (EIA), -36dBm ≤1GHz,-30dBm >1GHz (ETS)
Modulation .......................................................................8K50F3E, 7K50F2D (E, (N)M)
11K0F3E, 10K5F2D (K)
FM Noise..........................................................................-40dB
Audio Distortion................................................................Less than 3%
Frequency Stability...........................................................±0.00025% (-30˚C to +60˚C)
Channel Spread ...............................................................32MHz : K, E
30MHz : (N)M
SPECIFICATIONS
KENWOOD CORPORATION
14-6, Dogenzaka 1-chome, Shibuya-ku, Tokyo 150-8501, Japan
KENWOOD SERVICE CORPORATION
P.O. BOX 22745, 2201 East Dominguez Street, Long Beach, CA 90801-5745,
U.S.A.
KENWOOD ELECTRONICS CANADA INC.
6070 Kestrel Road, Mississauga, Ontario, Canada L5T 1S8
KENWOOD ELECTRONICS DEUTSCHLAND GMBH
Rembrücker Str. 15, 63150 Heusenstamm, Germany
KENWOOD ELECTRONICS BELGIUM N.V.
Mechelsesteenweg 418 B-1930 Zaventem, Belgium
KENWOOD ELECTRONICS FRANCE S.A.
13, Boulevard Ney, 75018 Paris, France
KENWOOD ELECTRONICS U.K. LIMITED
KENWOOD House, Dwight Road, Watford, Herts., WD1 8EB United Kingdom
KENWOOD ELECTRONICS EUROPE B.V.
Amsterdamseweg 37, 1422 AC Uithoorn, The Netherlands
KENWOOD ELECTRONICS ITALIA S.p.A.
Via G. Sirtori, 7/9 20129 Milano, Italy
KENWOOD IBERICA S.A.
Bolivia, 239-08020 Barcelona, Spain
KENWOOD ELECTRONICS AUSTRALIA PTY. LTD.
(A.C.N. 001 499 074)
16 Giffnock Avenue, North Ryde, N.S.W. 2113, Australia
KENWOOD ELECTRONICS (HONG KONG) LTD.
Unit 3712-3724, Level 37, Tower one Metroplaza, 223 Hing Fong Road, Kwai Fong, N.T.,
Hong Kong
KENWOOD ELECTRONICS TECHNOLOGIES(S) PTE LTD.
Sales Marketing Division
1 Ang Mo Kio Street 63, Singapore 569110
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Kenwood TK-285N Service Manual
Kenwood TK-285N Service Manual
Kenwood TK-285N Service Manual
Kenwood TK-285N Service Manual
Kenwood TK-285N Service Manual
Kenwood TK-285N Service Manual
Kenwood TK-285N Service Manual
Kenwood TK-285N Service Manual
Kenwood TK-285N Service Manual