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SONY SPPA974
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of SONY SPPA974 Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

The manual is available in languages: English

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Text excerpt from page 43 (click to view)
2) HANDSET
1. Test Mode Entryâ Press âPGMâ key and enter â TESTâ on keypad. Alternative entryâ Write 99h into LSB of location 9 in EEPROM. Exitâ Press on âOFFâ key. LCD testâ Press the â7â key. Toggle TX powerâ Press the â0â key. Increment RF channelâ Press the â#â key. 2. Test Equipment Required and Connection

3) BASE UNIT
1. Test Mode Entryâ Simultaneously press the âHANDSET LOCATORâ key and toggle the âDIAL MODEâ switch. When in test mode, the âIN USEâ and âCHARGEâ LEDs will be light on. Alternative entryâ Write 99h into LSB of location 9 in EEPROM. Exitâ Remove the AC power adaptor. Toggle TX powerâ DIAL MODE switch (S4001) T (TONE) position : TX ON P (PULSE) position : TX OFF Increment RF channelâ Press the âHANDSET LOCATORâ key. 2. Test Equipment Required and Connection
C1029 C1030 â RF UNIT (HS) â J1 frequency counter â BASE MAIN BOARD (SIDE B) â â BASE MAIN BOARD (SIDE A) â frequency counter

â HAND MAIN BOARD â J1003

*
BATTERY 3.6V 48pin U1001

*

C1031 â RF UNIT (BU) â

J1 J1004

frequency counter

frequency counter

C4016 C4014 U4001 48pin

3. Verify Procedure Item 18.4MHz Frequency Error

Remark Connect the frequency counter to the test point J1, press â0â 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.

C4017

4. Adjustment Procedure Item 18.4MHz Frequency Error Adjustment Element C1030 Remark 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 U1001 pin rk. Adjust for 0 Hz ± 1 kHz.

3. Verify Procedure Item 18.4MHz Frequency Error

Remark Connect the frequency counter to the test point J1, press â0â 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 18.4MHz Frequency Error

Adjustment Element C4016

Remark 1. Remove C4017 from the BASE MAIN board. 2. Solder an 20PF chip capacitor C4016 (1-164-160-11) on the BASE MAIN board (in parallel of C4014). 3. Connect the frequency counter to the U4001 pin rk. Adjust for 0 Hz ± 1 kHz.

â3â

â4â

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