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KX-TC1205RUB, KX-TC1205RUF, KX-TC1205RUS, KX-TC1205RUW
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28 CIRCUIT
BOARD
(Base
Unit)
28.1. Component View
IC5
KX-TC1205RUB/W/S/F CIRCUIT BOARD (Component View (Base Unit))
KX-TC1205RUB/ KX-TC1205RUW / KX-TC1205RUS
/KX-TC1205RUF
65
Contents
Main
CONTENTS
Page Page
Page
Page
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7 TROUBLESHOOTING GUIDE
7.1. Check Power
7.2. Bell Reception
7.3. Check Battery Charge
Page
Page
Page
8 ADJUSTMENTS (BASE UNIT)
8.1. Test Mode Flow Chart (Base Unit)
8.2. How to change the channel
*: Refer to Flow Solder Side View (P.66).
8.3. Adjustment
8.4. Adjustment Standard (Base Unit)
IC2
IC3 IC6
IC1
Note: (A) - (H) is refered to ADJUSTMENTS (BASE UNIT) (P.23)
9 ADJUSTMENTS (HANDSET)
9.1. Test Mode Flow Chart (Handset)
9.2. How to change the channel
9.3. Adjustment
9.4. Adjustment Standard (Handset)
+ -
(Flow Solder Side View)
Note: (A)-(I) is refered to ADJUSTMENTS (HANDSET) (P.26)
10 RF SPECIFICATION
10.1. Base Unit
10.2. Handset
11 HOW TO CHECK THE HANDSET SPEAKER
12 FREQUENCY TABLE (MHz)
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Page
Page
13.5.2. Base Unit
13.5.1. Handset
14 BLOCK DIAGRAM (BASE UNIT)
RF IC IC1
TELEPHONE LINE INTERFACE
CPU IC2
POWER SUPPLY RESET CHARGE
15 BLOCK DIAGRAM (HANDSET)
RF IC IC1
CPU IC2
16 CIRCUIT OPERATION
16.1. Outline
16.2. Power Supply Circuit
Page
16.4. Charge Circuit
16.5. Telephone LineInterface
16.6. Transmitter/Receiver
16.6.1. Base to Handset
16.6.2. Handset to Base
16.6.3. RF signal operation/control and PLLoperation (RFUNIT)
Page
Page
17.2. Battery Low / PowerDown Detector
Page
Page
20 HOW TO REPLACE FLAT PACKAGE IC
20.1. Preparation
20.2. Procedure
20.3. Modification Procedure of Bridge
Page
Page
Page
24 REPLACEMENT PARTS LIST
24.1. Base Unit
24.1.1. CABINET AND ELECTR ICAL PARTS
24.1.2. MAIN P.C.BOARD PARTS
Page
Page
24.2. Handset
24.2.1. CABINET AND ELECTR ICAL PARTS
24.2.2. MAIN P.C.BOARD PARTS
Page
24.3. ACCESSORIES ANDPACKING MATERIALS
25 FOR SCHEMATIC DIAGRAM
26 SCHEMATIC DIAGRAM (Base Unit)
26.1. Base Unit
RING SELECT
AGC CIRCUIT
RX TX
26.2. RF Unit (Base Unit)
RX TX
4.4V450kHz 10.7MHz
IC1
0V
27 SCHEMATIC DIAGRAM (Handset)
27.1. Handset
3.9V
3.9V0V
P75
27.2. RF Unit (Handset)
2.1V
450kHz
IC1
RX TX
Page
Page
28.2. Flow SolderSide View
IC2
KX-TC1205RUB/W/S/F CIRCUIT BOARD (Flow Solder Side View (Base Unit))
IC3 IC4
IC1
29 CIRCUIT BOARD (Handset)
29.1. Component View
IC2
29.2. Flow SolderSide View
RX VCO
IC1