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Anleitung Zusammenfassung
Feb. 2001 Cassette mechanism Cassette mechanism KS-FX922R Adjustment method Test Instruments reqired for adjustment 1.Digital osclloscope(100MHz) 2.Frequency Counter meter 3.Electric voltmeter 4.Wow & flutter meter 5.Test Tapes VT724 for DOLBY level measurement VT739 For playback frequency measurement VT712 For wow flutter & tape speed measurement VT703 For head azimuth measurement 6.Torque gauge Cassette type for CTG-N (mechanism adjustment) Measuring conditions(Amplifier section) Power supply voltage DC14.4V(10.5~16V) Load impedance 4 (2Speakers connection) Line out 20k Standard volume position Balance and Bass,Treble volume .Fader :Center(Indication"0") Loudness,Dolby NR,Sound,Cruise:Off Volume position is about 2V at speaker output with following conditions.Playback the test tape VT721. AM mode 999kHz/62dB,INT/400Hz,30% modulation signal on receiving. FM mono mode 97.9MHz/66dB,INT/400Hz,22.5kHz deviation pilot off mono. FM stereo mode 1kHz,67.5kHz dev. pilot7.5kHz dev. Output level 0dB(1 V,50 /open terminal). Tuner section BAND STEP FM : 100kHz (Seek), 50kHz (Manual) AM : 9kHz step Preset Memory Initialization BandPreset Memory M1 M2 M3 M4 M5 M6 FM(MHz) 87.5 89.9 97.9 105.9108.0 87.5 AM(kHz) 153 216 603 999 1404 1620 DUMMY LOAD Exclusive dummy load should be used for AM and FM dummy load,there is a loss of 6dB between SSG output and antenna input. The loss of 6dB need not be considered since direct reading of figures are applied in this working standard. Arrangement of Adjusting Cassette Mechanism Section Capstan motor Tape speed adjust (Surface) Azimuth screw (Forward side) Azimuth screw (Reverse side) Playback head KS-FX922R Arrangment of adjusting Head amplifier board section (Reverse side) VR402:Rch VR401:Rch (Dolby NR level adj) (Dolby NR Frequency response adj) 1 C401 C402 C403 C404 C405 C406 C407 C408 C409 C410C411C412 C413 C414 C415 C416 C417 C418 C419 CP401 CP402 CP403 D401 D402 D403 IC401 IC402 Q401 Q402 Q403R401 R402 R403 R404R405 R406R407 R408 R409 R410 R411 R412R413 R414 R415R416 R417 R418R419 R420 R421 R422 R423 R424 R425 VR402 VR401 B403 B415 B413 B407 B416 B406 B414 B405 B412 B404B410 B402 B408 B401 B409 B411 1 11 21 117 1 2 E 1 1 FSMW1101A 31 TPP Information for using a car audio service jig 1. We're advancing efforts to make our extension cords common for all car audio products. Please use this type of extension cord as follows. 2. As a U-shape type top cover is employed, this type of extension cord is needed to check operation of the mechanism assembly after disassembly. 3. Extension cord : EXTKSRT002-18P ( 18 pin extension cord ) For connection between mechanism assembly and main board assembly. Check for mechanism driving section such as motor ,etc.. Cassette mechanism Disassembly method 1. Remove the bottom cover. 2. Remove the front panel assembly. 3. Remove the top cover . 4. Install the front panel. 5. Confirm that current is being carried by connecting an extension cord jig. Note Available to connect to the CP701 connector when installing the front panel. Front panel assembly EXTKSRT002-18P Extension cord Main boardMain board to Main board to Cassette mechanism EXTKSRT002-18P KS-FX922R Extension cord The mechanism should be directly connected to the board using the extension wire. EXT-KSRT002-18P Cassette mechanism Extension cord Front panel assembly Main boardMain board EXTKSRT002-18P to Cassette mechanism to Main board EXTKSRT002-18P KS-FX922R Item 1. Head azimuth adjustment 2. Tape speed and wow flutter confirmation 3. Play back frequency response confiramation Conditions Test tape: SCC-1659 VT703(10kHz) Test tape: VTT712 (3kHz) Test tape: VTT724 (1kHz) VTT739 (63Hz / 1kHz / 10kHz) Adjustment and Confirmation methods Head height adjustment Adjust the azimuth directly. When you adjust the height using a mirror tape, remove the cassette housing from the mechanism chassis. After installing the cassette housing, perform the azimuth adjustment. 1. Load the SCC-1659 mirror tape. Adjust with height adjustment screw A and azimuth adjustment screw B so that line A of the mirror tape runs in the center between Lch and Rch in the reverse play mode. 2. After switching from REV to FWD then to REV, check that the head position set in procedure 1 is not changed. (If the position has shifted, adjust again and check.) 3. Adjust with azimuth adjustment screw B so that line B of the mirror tape runs in the center between Lch and Rch in the forward play mode. Head azimuth adjustment 1. Load VTT724 (VT724) (1kHz) and play it back in the reverse play mode. Set the Rch output level to max. 2. Load VTT703 (VT703) (10kHz) and play it back in the forward play mode. Adjust the Rch and Lch output levels to max, with azimuth adjustment screw B. In this case, the phase difference should be within 45 . 3. Engage the reverse mode and adjust the output level to max, with azimuth adjustment screw C. (The phase difference should be 45 or more.) 4. When switching between forward and reverse modes, the differen...