– 18 –
3-1. HANDSET
1. Test Mode
Entry— Press “PGM” key and enter “ TEST” on keypad.
Alternative entry— Write 99h into LSB of location 9 in EEPROM.
Exit— Press on “OFF” key.
LCD test— Press the “7” key.
Toggle TX power— Press the “0” key.
Increment RF channel— Press the “#” key.
2. Test Equipment Required and Connection
J1
frequency
counter
J1003
J1004
BATTERY
3.6V
U1001
C1031
C1030
C1029
– HAND MAIN BOARD –
– RF UNIT (HS) –
SECTION 3
ELECTRICAL ADJUSTMENTS
3. Verify Procedure
Item
Remark
18.4MHz Frequency Error
Connect the frequency counter to the test point J1, press “0” key to turn on the TX power. Then, check
the frequency ± 1 kHz. If the result is within ± 1 kHz, then no adjustment required. Otherwise, refer to
item 4. for Adjustment Procedure.
4. Adjustment Procedure
Item
Adjustment Element
Remark
18.4MHz Frequency Error
C1030
1. Remove C1031 from the HAND MAIN board.
2. Solder an 20PF chip capacitor C1030 (1-164-160-11) on the
HAND MAIN board (in parallel of C1029).
3. Connect the frequency counter to the test point J1. Adjust for 0 Hz ± 1 kHz.
* *
Summary of Contents for SPP-ID975 - Cordless Telephone
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Page 27: ...SPP ID975 ID976 4 7 SCHEMATIC DIAGRAM BASE KEY SECTION 35 36 Page 27 ...
