Sony SPP-ID970 Service Manual page 33

2) 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
– HAND MAIN BOARD –
C1029
J1003
48pin
BATTERY
U1001
3.6V
J1004
frequency
counter
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
3. Connect the frequency counter to the U1001 pin rk. Adjust for 0 Hz ± 1 kHz.
– RF UNIT (HS) –
C1030
J1
C1031
frequency
counter
HAND MAIN board (in parallel of C1029).
– 3 –
3) BASE UNIT
1. Test Mode
Entry— Simultaneously press the "HANDSET LOCATOR" key and toggle the "DIAL MODE" switch. When in test mode, the "LINE" and
"CHARGE" LEDs will be light on.
Alternative entry— Write 99h into LSB of location 9 in EEPROM.
Exit— Remove the AC power adaptor.
Toggle TX power— DIAL MODE switch (S2001)
T (TONE) position : TX ON
P (PULSE) position : TX OFF
Increment RF channel— Press the "HANDSET LOCATOR" key.
2. Test Equipment Required and Connection
frequency
counter
– BASE MAIN BOARD
(SIDE B) –
– RF UNIT (BU) –
J1
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 C2016 1. Remove C2017 from the BASE MAIN board.
2. Solder an 20PF chip capacitor C2016 (1-164-160-11) on the
3. Connect the frequency counter to the U2001 pin rk. Adjust for 0 Hz ± 1 kHz.
frequency
counter
– BASE MAIN BOARD
(SIDE A) –
U2001
48pin
C2017
C2015 C2016
BASE MAIN board (in parallel of C2015).
– 4 –