Kenwood TR-7625 Service Manual page 34

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TR-7625
STATIC AWARENESS
Some semiconductors and custom IC's can be damaged by
electrostatic discharge during handling. This notice explains
g how you can minimize the chances of destroying such
@ devices by:
D
@
1. Knowing that there is a problem.
2. Learning the guidelines for handling them.
3. Using the procedures, and packaging and bench
techniques that are recommended.
The following practice should be followed to minimize damage to S.S. devices.
1. MINIMIZE HANDLING
TRANSPORT
7. AVOID PLASTIC, VINYL AND STYRAFORM IN WORK
3. DISCHARGE PERSONAL STATIC BEFORE HANDLING
AREA.
DEVICE
8. HANDLE S.S. DEVICES ONLY AT A STATIC-FREE
4. HANDLE S.S. DEVICES BY THE BODY WORK STATION.
WARNING: INDICATES USAGE OF MOS DEVICE(S) 9. ONLY GROUNDED TIP SOLDER-SUCKERS SHOULD
WHICH MAY BE DAMAGED BY STATIC BE USED.
DISCHARGE USE SPECIAL HANDLING. 10. ONLY GROUNDED TIP SOLDERING IRON SHOULD BE
USED.
CAUTION: SUBJECT TO DAMAGE BY STATIC
ELECTRICITY.
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5. USE ANTI-STATIC CONTAINERS FOR HANDLING AND
SPECIFICATIONS [K, W type
GENERAL
Semiconductors: Transistors: 48 (K), 47 (W)
FETs: 9
ICs: 17
Diodes: 88 (K), 77 (W)
Frequency Range: 144.00 to 147.995 MHz (K), 144.00 to 145.995 MHz (W)
Digital control of phase locked VCO
Better than +750 Hz at 25°C
Frequency Synthesizer:
Synthesizer Stability:
Mode: ; FM
No. of Channels: 800 (K), 400 (W)
Operating Temperature: —20 to +50°C
Power Voltage: 11.5V DC to 16.0V DC (13.8V DC standard)
Grounding: Negative grounding
Antenna Impedance: 5OQ
DC Current: Less than 0.5A in receive with no input signal
Less than 6A in HI transmit _ &
| (at 13.8V DC)
Dimensions: | 161 mm (6-5/16") wide
61 mm (2-3/8") high
230 mm (9-1/16") deep
Weight: 1.75 kg (3.85 Ibs) Approx.
TRANSMITTER SECTION |
RF Output Power: High: 25 watts (min.)
Low: 5 watts approx. (adjustable to 25 watts)
Modulation: Variable reactance direct shift
Max. Frequency Deviation: +5 kHz
Spurious Radiation: Less than —60 dB
Touch Tone Input Impedance: 6002
Microphone: Dynamic microphone with PTT switch, 5002
RECEIVER SECTION
Circuitry: Double superheterodyne
Intermediate Frequency: Ist: IF 10.7 MHz
2nd: IF 455 kHz
Sensitivity: Less than 0.4 uwV for 20 dB quieting
(Less than 1 nV for 30 dB S/N)
Squelich Sensitivity: Less than 0.25 nV
Pass Band Width: Better than 12 kHz at 6 dB down
Selectivity (2 Signal): Better than 76 dB at 30 kHz (K), 70 dB at 25 kHz (W) of adjacent channel
Image Rejection: Better than 70 dB
Spurious Interference: Better than 60 dB
intermodulation:
Better than 66 dB (K), 60 dB (W)
Audio Output: More than 1.5 watts across 8Q load (10% distortion)
NOTE: The circuit and ratings may change without notice due to developments in technology.
KENWOOD CORPORATION
Shionogi Shibuya Building, 17-5, 2-chome Shibuya, Shibuya-ku, Tokyo 150, Japan
TRIO-KENWOOD COMMUNICATIONS
Post Office Box 7065, Compton,California 90224,U.S.A.
KENWOOD COMMUNICATIONS
DIVISION OF KENWOOD ELECTRONICS DEUTSCHLAND GMBH
Rembrucker Str. 15, 6056 Heusenstamm, West Germany
KENWOOD ELECTRONICS BENELUX NV.
Leuvensesteenweg 504, B-1930 Zaventem, Belgium
KENWOOD ELECTRONICS AUSTRALIA PTY. LTD.
4E. Woodcock Place, Lane Cove, N.S.W. 2066, Australia
© 1985-1/1986-11 PRINTED IN JAPAN B51-0908-10 250 (K) (W) (T) (G)
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