Accessory Microphone - Kenwood TM-201A Service Manual

CIRCUIT DESCRIPTION
Lithium battery (W09-0323-05)
'Specifications
Model and Efficiency
Shor tent t+
Model ca2032
Nominal Voltage av
Nominal Capacity
170 m Ar
a
Discharge Stop Voltage
2.0
imam
SS
Dpcusiion
Dimensions
Diameter 20.2 mm
7
pen ig
High 3.2mm a O88)
Weight
39
i
* {
i
Fig. 12 H
Replacement procedure
i
When replace the back-up oattery read as follows.
1. Remove the lower case. ACCESSORY MICROPHONE 4
2. Take care not to damage parts an the PC board since they
.
(i
'are soidered battory.
(T91-0331-05) M, W
{
3. Remount cell again (conform to cell pole) (791-0335-05) T peas i
4. After power switch is on, push the reset switch is on.
Mic HANGER
PRECAUTIONS FOR HANDIING GALLIUM ARSE-
NIDE FET's (GaAs FET)
The gallium arsenide FET (2SK37) used in this device
damaged by static electricty Take careful n e t
ing points when soicering and handling
1. When handling this FST separat
sure to first discharge yourself to ground.
2. Use a grounded-ti soldering iron
3. Ground the FET while soldering-in
4. Cover the work table with a conductive,
insure an adequate static discharge oa
unded panel to
Work table
'onduetive panel
Conductive wrist strap
(to ground the technician)
Groune:-ti
soldering iron
Fig. 14