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SONY SPP68
Service Manual


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

Description of SONY SPP68 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 15 (click to view)
RX Section Adjustment
1. RX Level Adjustment • Perform the adjustment at T1CH (26CH: 43.780 MHz) as a rule. Setting :
FM RF SSG HAND MAIN board TP2 TP3 (RX GND)

3. RSSI (H) Sensitivity Adjustment • Perform the adjustment at T1CH (26CH: 43.780 MHz) as a rule. Setting :
AF ocillator FM RF SSG HAND MAIN board TP2 TP3 (RX GND) output: 20 Hz

Procedure : 1. FM RF SSG condition : Carrier frequency : 43.780 MHz Modulation : 1 kHz Deviation : 3 kHz Output level : 60 dBµV (1 mV) (EMF) 2. Adjust the FL101 for the maximum reading on the level meter. Also check that the output level is within the specified values.
level meter HAND MAIN board + – TP27 (SP) TP26 (SP)

Procedure : 1. FM RF SSG condition : Carrier frequency : 43.780 MHz Modulation frequency : 20 Hz (EXT) Deviation : AM 50% Output level : 2 dBµV (1.259 µV) (EMF) 2. Use the oscilloscope to confirm the FM RF SSG input (AF) signal waveform and RSSI signal, and use the RV101 so that they are synchronized matched (duty is synchronized).
oscilloscope (DC range) HAND MAIN board + – TP9 (SIG IN) TP3 (RX GND)
RSSI WAVEFORM

Specified value: –16.6 to –8.6 dBV Adjustment Location: HAND MAIN board (See page 17)

RSSI output waveform

2. RX VT Adjustment Setting:
digital voltmeter

0V RF signal EXT signal 20Hz Adjust so that they synchronize at 0V.

+ –

TP5 (RX VT) TP3 (RX GND)

Adjustment Location: HAND MAIN board (See page 17)

Procedure: 1. The digital voltmeter connected TP5 (RX VT) to TP3 (RX GND). 2. Adjust the L102 for 0.8 V ± 0.05 V reading on the digital voltmeter. Adjustment Location: HAND MAIN board (See page 17)

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