jedyne do czego mogę mieć zastrzeżenie to jakość zdjęć zawartych w przesłanej instrukcji serwisowej ponieważ są fatalnej jakości, praktycznie nieczytelne. tak poza tym jestem zadowolony to jest to czego szukałem.
Instrukcja jest OK. Schematy czytelne, opisane niektóre procedury.
Tekstowy podgląd strony 20 (kliknij aby zobaczyć)
Procedure n Perform the checking with the MIC input connector shortcircuited. (1) Set the spectrum analyzer as follow: CENTER FREQUENCY (fc): CE21 model; 470.125 MHz CE33 model; 566.125 MHz CE62 model; 798.125 MHz CE67 model; 838.125 MHz U14 model; 470.125 MHz U30 model; 566.125 MHz U62 model; 758.125 MHz U66 model; 782.125 MHz REFERENCE LEVEL: 20 dBm FREQUENCY SPAN: 200 kHz (20 kHz/DIV) RBW (resolution band width): 3 kHz VBW (video band width): 1 kHz ATT: 30 dB (2) Decrease gradually the DC output voltage of the DC regulated power supply and confirm that the battery alarm signal turns on at 2 ± 0.2 V. (3) Check that level difference between carrier frequency (center frequency level) on spectrum analyzer and tone signal is with in 29 ±2 dB.
20 dBm
2. Frequency check
Connections (For connecting the DC power supply, refer to the �Preparations� on page 3-2.)
MM-SMA (J)connector with SMA-BNC (J) connector Spectrum analyzer
CN301
Jumper wire TP200
MB-940 Board (A side)
TP501 (GND)
Connect a jumper wire between TP200 and TP501 (GND) by soldering. (TONE signal : OFF).
Procedure n Perform the checking with the Mic input connector (SMC94P) short-circuited. (1) Set the modulation analyzer as follows: MEASUREMENT: FM MEASUREMENT RANGE: ± 40 kHz HPF: 4 kHz LPF: >20 kHz DE EMPHASIS: OFF (2) Set the DC output voltage of DC power supply to 1 ± 0.1 V so that battery alarm signal goes on. (3) Check that frequency counter (resolution:0.1 Hz) reading is 32.782 kHz ±1 Hz. (4) After the checking, remove (unsolder) the jumper wire between TP200 and TP501 (GND) on the MB-940 board (A-side).
