Panasonic KX-TG5521CAB / KX-TGA551RUB (serv.man2) Service Manual ▷ View online
31
KX-TG5521CAB/KX-TGA551RUB
9.1.4.
Check the RF part
9.1.4.1.
Finding out the Defective part
After All the Checkings or Repairing
1. Re-register the checked Handset to the checked Base Unit, and Regular HS to Regular BU.
Note:
If you need to register a handset, refer to Registering a Handset to a Base Unit in the Operating Instructions.
1. Prepare Regular HS (Handset) and Regular BU (Base unit).
2. a. Re-register regular HS (Normal mode) to Base Unit (to be checked).
If this operation fails in some ways, the Base Unit is defective.
b. Re-register Handset (to be checked) to regular BU (Normal mode).
If this operation fails in some ways, the Handset is defective.
2. a. Re-register regular HS (Normal mode) to Base Unit (to be checked).
If this operation fails in some ways, the Base Unit is defective.
b. Re-register Handset (to be checked) to regular BU (Normal mode).
If this operation fails in some ways, the Handset is defective.
Base Unit is defective
Handset is defective
START
Registration of
Regular HS to
Base Unit
Registration of
Handset to
Regular BU
(other checkings)
Registration of Handset to Base Unit
(checked ones)
Registration of Regular HS to Regular BU
Yes
No
No
Yes
32
KX-TG5521CAB/KX-TGA551RUB
9.1.4.2.
RF Check Flowchart
Each item (1 ~ 3) of RF Check Flowchart corresponds to Check Table for RF part (P.33).
Please refer to the each item.
Please refer to the each item.
Note:
(*1) Base unit - refer to (G) of Check Point (Base Unit) (P.36)
Handset - refer to (H) of Check Point (Handset) (P.40)
Handset - refer to (H) of Check Point (Handset) (P.40)
Start
Link
confirmation
Normal
1
Control
signal
confirmation
X'tal
Frequency
confirmation
Range
confirmation
Normal
Check Range: Compare with a regular unit.
Check DSP interface parts.
(RF Block <->DSP on BU/HS P.C.B)
(RF Block <->DSP on BU/HS P.C.B)
Adjust X'tal Frequency. (*1)
GOOD
4
2
3
OK
OK
NG
NG
NG
NG
OK
OK
33
KX-TG5521CAB/KX-TGA551RUB
9.1.4.3.
Check Table for RF part
Note:
(*1) Refer to Adjustment Standard (Base Unit) (P.51)
(*2) Refer to Adjustment Standard (Handset) (P.55)
(*2) Refer to Adjustment Standard (Handset) (P.55)
No.
Item
BU (Base Unit) Check
HS (Handset) Check
1
Link Confirmation Normal
HS, BU Mode: [Normal mode]
1. Register Regular HS to BU (to be
checked).
2. Press [Talk] key of the Regular HS to
establish link.
1. Register HS (to be checked) to Regular
BU.
2. Press [Talk] key of the HS to establish link.
2
X’tal Frequency confirmation
1. Check X’tal Frequency. (*1)
(10.368 MHz ± 100 Hz)
1. Check X’tal Frequency. (*2)
(10.368 MHz ±100Hz)
3
Range Confirmation Normal
HS, BU Mode: [Normal mode]
1. Register Regular HS to BU (to be
checked).
2. Press [Talk] key of the Regular HS to
establish link.
3. Compare the range of the BU (being
checked) with that of the Regular BU.
1. Register HS (to be checked) to Regular
BU.
2. Press [Talk] key of the HS to establish link.
3. Compare the range of the HS (being
3. Compare the range of the HS (being
checked) with that of the Regular HS.
34
KX-TG5521CAB/KX-TGA551RUB
9.1.5.
Check Handset Transmission
Cross Reference:
Signal Route (P.14)
9.1.6.
Check Handset Reception
Cross Reference:
How to Check the Handset Speaker or Receiver (P.59).
Signal Route (P.14)
Signal Route (P.14)
9.1.7.
Check Caller ID
Cross Reference:
Signal Route (P.14)
OK
Check MIC of Handset.
Check CDL TX (HANDSET) in Signal Route.
Check Handset Speaker in How to check the Handset
Speaker or Receiver.
Speaker or Receiver.
OK
Check CDL RX (HANDSET) in Signal Route.
Check Caller ID in Signal Route.
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