Electrical Adjustments - Sony SPP-ID975 Service Manual

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
3. Verify Procedure
Item
4. Adiustment Procedure
Item
SECTION 3

ELECTRICAL ADJUSTMENTS

Remark
Connect the frequency counter to the test point J 1, press "0" key to turn on the TX power. Then, check
the frequency f 1 kHz. If the result is within + 1 kHz, then no adjustment required. Otherwise, refer to
item 4. for Adjustment Procedure.
Adjustment Element Remark
Cl030
2. Solder an 20PF chip capacitor Cl030 (l-164-160-1 1) on the
HAND MAIN board (in parallel of C1029).
3. Connect the frequency counter to the test point Jl. Adjust for 0 Hz + 1 kHz.
Cl030
frequency
counter