Panasonic KX-TG9385BXT, Service Manual

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KX-TG9385BXT/KX-TGA939BXT
( F )* Battery Monitor Check - 1. Apply 2.25 V between BATT+ and BATT-.
2. Execute the command
sendchar PAD
sendchar LED 0
sendchar CRX 0 1
sendchar AD1
It assumes that the return value is XX.
a) 6c XX 71: No need to adjust
b) XX: 6A ~ 6B: Need to adjust
XX: 72 ~ 74: Need to adjust
Write AD value of 2.25 V to EEPROM.
ex) read data: XX = 6A, write data: YY = 6A
read data: XX = 73, write data: YY = 73
EEPROM = 0004(Low Voltage) write “YY”
Execute the command “wreeprom 00 04 01 YY”.
EEPROM = 0005(No Voltage) write ‘’YY - 1D’’
Execute the command “×wreeprom 00 05 01 ZZ”.
EEPROM = 000A(Low Voltage BL) write “YY - 16”
Execute the command “wreeprom 00 0A 01 WW”.
Note:
ZZ = YY - C
No Voltage writing data limit is ‘00’.
c) XX: 00 ~ 69: Reject
XX: 75 ~ FF: Reject
IC1, F1, C1
C3, R12, R45
( G ) Battery Low Confirma-
tion
- 1. Apply 2.40 V between BATT+ and BATT-.
2. Confirm that there is no flashing of Battery Icon.
3. Apply 2.25 V ± 0.08 V between BATT+ and BATT-.
4. Confirm that there is flashing of Battery Icon. IC1, F1, C1
C3, R12, R45
( H )* BBIC Clock Adjustment CLK 1. Apply 2.6 V between BATT+ and BATT- with DC power.
2. Input Command “sendchar sfr”, then you can confirm the current value.
3. Check X’tal Frequency. (10.368 MHz ± 100 Hz).
4. If the frequency is not 10.368 MHz ± 100 Hz, adjust the frequency of CLK exe-
cuting the command “sendchar sfr xx xx (where xx is the value)” so that the
reading of the frequency counter is 10.368000 MHz ± 5 Hz.
Note:
Clear the registered information for Base Unit before measurement, because the
Frequency will not possibly get stable due to the registered information.
Pressing the button of “3” “7” “9” “#” clears the registration.
Register to it on Base Unit after measurement.
IC1, X1, C47
( I )* Transmitted Power Con-
firmation
- Remove the Antenna starting from 1 to 5
1. Configure the Spectrum Analyzer as follows;
• Center frequency: 1924.992MHz
• Span: 10MHz
• RBW: 3MHz
• VBW: 3MHz
• Trace Max: Hold mode
2. Execute the command "btx 00 02 0"
3. Execute the command "TPC 0"
4. Execute the command "ANT 1"
5. Confirm that max power 15 ~ 20.5 dBm
IC1,
C808~ C815,
L804, L805,
C825, C834,
C819, C840,
IC801, R106,
R107, C117,
C118, C186,
DA1,
C802~ C804,
D801,
R801~ R806
( J )* RSSI Level Confirmation - Remove the Antenna starting from 1 to 5
1. Configure the Signal Generator as follows;
• Frequency 1924.992MHz
• RF level = - 70 dBm
2. Execute the command "CRX 00 00"
3. Execute the command "ANT 1"
4. Execute the command "RSI"
5. Confirm that the returned value is 22 ± A (hex).
IC1, R106,
R107, C117,
C118, C186,
C125, C842,
DA1,
C802~ C804,
D802, C826,
C822, C820,
C832, C833,
R807
( K ) Audio Check and Confir-
mation
- 1. Link to BASE which is connected to Line Simulator.
2. Set line voltage to 48 V and line current to 40 mA.
3. Input -45 dBm/1KHz to MIC and measure Line output level.
4. Confirm that the level is -15.5 dBm ± 3 dBm and that the distortion level is < 5%
at TEL Line (600
Ω
Load).
5. Input -20 dBm/1KHz to Line I/F and measure Receiving level at Receiver (150
Ω
Load).
6. Confirm that the level is -15 dBm ± 3 dBm and that the distortion level is < 5%
at Receiver. (vol = 2)
IC1, R23, C12,
D19, D20,
C96, C97,
R215, R27,
RA4, C11,
C13, R28, D3,
D4, L10, L11,
MIC, L9
Items Check
Point
Procedure Check or
Replace Parts