PT260 Service Manual
2
Chapter 1 Overview
1.1 Scope of Application
This manual applies to the service and maintenance of PT260
series of FM portable radios, and is intended for use by engineers
and professional technicians that have been trained by Kirisun.
Information that is needed in the maintenance all contain in this
manual. In order to improve the performance and quality of this
product, Kirisun owns the right to modify the structure and change
electronic parameters without first notice. For the latest service
manual, you can visit our website www.kirisun.com
to download it,
or ask us or the authorized agencies to get it.
Please read this manual carefully before servicing this
product.
1.2 Attentions
Safety
Do not connect the antenna connector and PCB with your
skin during the servicing.
Do not reverse the power polarity.
It may cause harm to the radio if signal input on the antenna
connector is higher than 20 dBm (100mW).
Do not turn on the radio until the antenna or load connection is
completed.
If the antenna has been damaged, do not use the radio.
Damaged antenna may cause light burning on skin.
Electromagnetic Interference
Do not use or repair the radio in the following areas:
Hospital, health center, and airport.
Areas containing potentially explosive atmosphere, e.g. orlop
deck of the ship, storage and transportation equipment for fuel and
chemical.
Areas near blasting sites or with electrical blasting cap.
Avoid using or repairing the radio in the following areas:
In the moving car. Because the radio wave transmitted from
this product may probably cause the car stopping to work.
Replacement Parts
Make sure that you are using the parts provided by Kirisun
during the servicing.
Although you can purchase the parts with the similar type in
the market, we are not sure that those can be used on our product,
and we do not ensure the quality will not be changed.
If you require any replacement parts, please submit the blank
with the following format.
Replacement Part Application
Product
Type
Part Name Part
No.
Parameters Material No. Pcs
PT260 Field Effect
Transistor
Q21 2SK3476 1TF1-2SK3476 1
PT260 Triode Q41 2SC4181(L18) 1TT1-2SC4181 1
PT260 Belt clip KBJ-09 1
1.3 Service
All the Kirisun products are subject to the service warranty.
The main unit of the radio is guaranteed for free service of 24
months. Accessories (such as battery pack, power adapter, antenna
or charger) are guaranteed for free service of 6 months. Earphones
are wearing parts and out of warranty.
In one of the following situations, charger free service will not be
available.
z No valid warranty card or original invoice.
z Malfunction caused by disassembling, repairing or
reconstructing the radio by users without permission.
z Wear and tear or any man-made damages such as mechanical
damage, burning or water leaking.
z Product’s serial number has been damaged or the product
trademark is difficult to identify.
After the warrant expires, lifetime service is still available.
We also provide service components to service stations and staffs at
favorable prices.
Chapter 2 External View and Functional Keys
2.1 External View
See figure below:
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