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World of Ham Radio 1997
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WOHR97_AmSoft_(1997-02-01).iso
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asb0023.txt
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1997-02-01
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==============================================================================
K E N W O O D
>>> A M A T E U R R A D I O S E R V I C E B U L L E T I N <<<
==============================================================================
Kenwood Service Centers
Kenwood Service Corporation Kenwood Service Center, East
2201 East Dominguez Street 829 Lynnhaven Parkway, Suite 130
Long Beach, California 90801 Virginia Beach, Virginia 23452
Telephone 1-310-639-5300 Telephone 1-804-340-1702
==============================================================================
BULLETIN # 23
MODEL: TR-7200A
SUBJECT: SERVICE NOTES
RECEIVER
1. No squelch: Check C84 47uf on X55-1110-11.
2. Intermittant receive: Check for D14 touching to ground on X55-1110-
11.
3. Both Q17, Q18 audio transistors burned up: Send for bulletin before
replacing.
4. Poor receiver sensitivity: Check for proper output of Q10 10.245 MHz
stage. If it is defective replace xtal.
5. No receiver audio noise: Check L23 discriminator coil.
6. No receiver: No C9 voltage at X55-1110-11.
7. Receiver sensitivity poor: Check D2 MI301.
Transmitter
1. Distortion on audio TX: Bad Q8 TA7061 IC.
2. No TX HI: Check for shorting terminals at HI/Low switch.
3. No TX: Check for proper T9 voltage at X56-1190-11.
4. No TX: Collector voltage SB at X45-1080-00. Check Q9 2SA496Y.
5. No TX: Check D1 MI301.