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Model
KX-TG8051RUB KX-TG8051RUW KX-TG8051RU1 KX-TG8051UAB KX-TG8051CAB KX-TG8052RUB KX-TG8052RUW KX-TGA806RUB KX-TGA806RUW KX-TGA806RU1
Pages
32
Size
2.15 MB
Type
PDF
Document
Service Manual / Supplement
Brand
Device
Telephone / DIGITAL CORDLESS PHONE
File
kx-tg8051rub-kx-tg8051ruw-kx-tg8051ru1-kx-tg8051ua.pdf
Date
PREV: Panasonic KX-TG8051RU2 / KX-TG8051RU3 / KX-TGA806RU2 / KX-TGA806RU3 Service Manual / Supplement

Panasonic KX-TG8051RUB / KX-TG8051RUW / KX-TG8051RU1 / KX-TG8051UAB / KX-TG8051CAB / KX-TG8052RUB / KX-TG8052RUW / KX-TGA806RUB / KX-TGA806RUW / KX-TGA806RU1 Service Manual / Supplement ▷ View online

9
3.1.5.
Signal Route
[Changed from original section “4.6. Signal Route”]
SIGNAL ROUTE
ROUTE
IN
OUT
SIGNAL
DTMF TONE
TEL OUT
(to Tel Line)
CDL TX
(to Tel Line)
CDL RX
(from Tel Line)
DTMF TONE
TEL IN
(from Tel Line)
B - P1 
SP-PHONE TX
(to Tel Line)
 SP-PHONE RX
(to Tel Line)
Caller ID
(from Tel Line)
(BASE UNIT)
B - P1 - C4 -  R6 - R33 - IC7 (15)        IC7 (87)        C812 -    
A - C3 -  R4 - R35 - IC7 (17)
(BASE UNIT)
IC7 (21) - R116 - R29 - C22 - Q5 - Q3 - D3         A 
 P1 - B
(BASE UNIT)
A              D3 - Q3 - Q5 - R20 - C56 - R117 - IC7 (19)
(HANDSET)
MIC (+) - C13 - RA4 - IC1 (17)        IC1(86)
MIC (  ) - C11 - RA4 - IC1 (18)          IC1(87)        L809 -
DA801 -  C803 - ANT  to BASE
(BASE UNIT)
from HANDSET   ANT1 - C851         DA802 - C803 - DA801 - C826 
ANT2 - C853
     
 IC7 (2)  
 IC7 (1)
IC7 (21) - R116 - R29 - C22 - Q5 - Q3 - D3 
 P1- B
 A
 - DA801 - C803 - DA802 
D3 - Q3  - Q5 - R20 - C56 - R117 - IC7 (19)        IC7 (87)       C812
 to HANDSET
(HANDSET)
from BASE UNIT   ANT - C803 - DA801 -  C826 
(BASE UNIT)
A  
B - P1
 IC7 (86)        
 C851 - ANT1
 C853 - ANT2
IC1 (2)
IC1 (1)
IC (21) - RECEIVER (+)
IC (22) - RECEIVER (  )
IC7 (86) 
DA801 -  C803 - DA802       
 to HANDSET
 C851 - ANT1
 C853 - ANT2
(HANDSET)
MIC (+) - C13 - RA4 - IC1 (17)        IC1(87) 
MIC (  ) - C11 - RA4 - IC1 (18)          IC1(86)       C812 -
DA801 - C803 - ANT to BASE
(BASE UNIT)
from HANDSET   ANT1 - C851         DA802 - C803 - DA801 - C826 
ANT2 - C853
     
IC7 (2)  
IC7 (1) 
IC7 (23) - R116 - R29 - C22 - Q5 - Q3 - D3 
 P1 - B
 A
- DA801 - C803 - DA802 
D3 - Q3  - Q5 - R20 - C56 - R117 - IC7 (19)        IC7 (87)       C812  
 to HANDSET
(HANDSET)
from BASE UNIT   ANT - C803 - DA801 -  C826 
(BASE UNIT)
A       
B - P1
 IC7 (86)
 C851 - ANT1
 C853 - ANT2
IC1 (2)
IC1 (1)
IC1 (35) - SP (-)
IC1 (37) - SP (+)
10
SIGNAL ROUTE
ROUTE
IN
OUT
SIGNAL
Headset Tx
(to Tel Line)
(HANDSET)
CN4 (2) - L72 - R306 - C14 - R22 - IC1 (19)       IC1 (87)  
fron Handset ANT1 - C851        DA802 - C803 - DA801 - C826        IC7 (2)        IC7 (21) - 
IC7 (86)        L809 - DA801 - C803 - 
ANT to BASE
- R116 - R29 - C22 - Q5 - Q3 - D3 
P1 - B 
to Handset
A
IC7 (1)
ANT2 - C853
Headset Rx
(from Tel Line)
(BASE UNIT)
(BASE UNIT)
fron BASE UNIT 
- C803 - DA802        C851 -  ANT1
- CN4 (5)
B - P1
A               D3 - Q3 - Q5 - R20 - C56 - R117 - IC7 (19)        IC7 (87)        L809 -  DA801 - 
IC1 (1)
IC7 (86) 
C853 - ANT2
ANT - C803 - DA801 - C826       IC1 (2)       IC1 (21) - L9 - C86 - L74 
(HANDSET)
11
3.2.
Troubleshooting Guide
3.2.1.
Check Power
[Changed from original section “9.1.1. Check Power”]
3.2.1.1.
Base Unit
Is the AC Adaptor inserted into AC outlet? (*1)
Cross Reference:
Power Supply Circuit 
Note:
(*1) Refer to Specifications for part number and 
supply voltage of AC Adaptor.
3.2.1.2.
Handset
Cross Reference:
Power Supply Circuit/Reset Circuit (P.8)
Is input of IC1 about 5.5 V - 8 V?
Check C32, C36 are not shorted.
Check AC Adaptor.
Check Power Supply Circuit.
Is the output voltage of IC2 about 2.85 V?
Does BBIC (IC7: 8) oscillate at 10.368 MHz?
Check X1.
Check BBIC (IC7).
Is the Collector of Q8 about 1.8 V?
Is BBIC (IC7: 71) High?
Check BBIC (IC7).
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
Is the output voltage of BBIC (IC7:45) about 3.0V?
Is the output voltage of BBIC (IC7:44) about 3.0V?
YES
YES
YES
NO
NO
Check Power Supply Circuit/Reset Circuit.
Check BBIC (IC1).
Check X1.
Is the voltage of  BATT+ 2.3 V more?
Check the battery and around BATT+ and
BATT- are not shorted.
Is the battery inserted BATT+ and BATT-?
Does BBIC (IC1: 8) oscillate at 10.368 MHz?
YES
YES
YES
NO
NO
YES
YES
Is the voltage of " 1.8V"  about 1.8 V?
(When LED is On)
Is the voltage of CP3.0V about 3.0V?
Check BBIC (IC1).
YES
Is the voltage of CPV2 about 3.0V?
YES
Is the voltage of CP2.8V about 2.8V?
NO
NO
NO
12
3.2.2.
Check Battery Charge
[Changed from original section “9.1.2. Check Battery Charge”]
3.2.2.1.
Handset
Cross Reference:
Check Power (P.11)
Charge Circuit
3.2.3.
Bell Reception
[Changed from original section “9.1.8. Bell Reception”]
3.2.3.1.
Base Unit
3.2.3.2.
Handset
Cross Reference:
Telephone Line Interface
Check Link
How to Check the Handset Speaker or Receiver
Is BBIC (IC1: 34) high at charge state?
Check Charge Circuit.
Check Power of Handset.
Is Check Power OK?
NO
NO
YES
Check around C54, C55, R36, R37.
When bell signal is coming, is there bell sound 
signal at BBIC (IC7: 15,17)?
NO
YES
When bell signal is coming, is there bell sound
signal at BBIC (IC7: 11)?
Check around C3, C4, C5, C6, R3, R4, R5, R6,
C136, C137, R32, R33, R34, R35, C52, C53, 
P1, C168, C42, C43,R42,R43 
NO
Does the bell sound from SPEAKER?
Check around SP+, SP- .
When bell signal coming, is there bell sound signal 
at BBIC (IC1: 35, 37)?
NO
NO
YES
When bell signal coming, is there bell sound signal
at SP+, SP- ?
YES
Check BBIC (IC1), C78, C79, C73, C72, D13, 
D14 , C77, C76, R77, R76.
NO
Check cable of SPEAKER and resistance value
of SPEAKER.
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