User manual KENWOOD DM-3090 SERVICE MANUAL

[. . . ] STEREO MINIDISC RECORDER DM-3090 SERVICE MANUAL © 1997-11/B51-5396-00 (K/K) 1812 KENWOOD badge (B43-0302-04) Front glass (B10-2457-08) Front panel (A60-1370-08) Knob (JOG) (K29-6946-08) Knob (REC/HP) (K29-6947-08) REC REC LEVEL STEREO MINIDISC RECORDER 0 10 PHONES LEVEL MULTI CONTROL MIN MAX TIMER/ DELETE TIME DISPLAY ON/STAND BY DISPLAY/CHARAC. TRACK/EDIT ENTER PHONES Knob (POWER) (K27-2261-08) Panel (A29-0898-08) Knob (K27-2262-08) Head phone jack (E11-0345-08) AC power cord bushing (J42-0338-08) Optical digital input (W02-2643-08) Analogue output terminal (E63-1031-08) DIGITAL LINE OPT. 2 REC IN PLAY OUT PLAY OUT REC IN 1 REC IN L L R R RESET AC power cord * (E30-) Optical digital output (W02-2643-08) Digital input terminal (E63-1032-08) Switch (RESET) (S68-0091-08) *Refer to parts list on page 49. In compliance with Federal Regulations, following are reproductions of labels on, or inside the product relating to laser product safety, KENWOOD-Corp. certifies this equipment conforms to DHHS Regulation No. 21 CFR 1040. 10, Chapter 1, Subchapter J. [. . . ] Check soldering joint and part of IC1601. Check soldering joint and part of IC1201. Check waveform on the pins 8 and 9 of IC1201 and soldering joint. No Check waveform on the pins 9 and 10 of IC1101 and soldering joint. No No No No 22 DM-3090 TROUBLE SHOOTING · Disc motor fails to run Does waveform appear on the pins 24 and 25 of IC1201 in the TEST mode focus gain coarse adjustment step?Yes Does waveform appear on the pins 34 and 35 of IC1601, pins 1 and 2 of CNP1603?Check soldering joint of PWB of completed IC1601 and CNP1601 disc motor. No Check soldering joint and parts of pins 24 and 25 of IC1201, and peripheral circuit. No · Tracking servo failure Does waveform appear on the pins 8 and 9 of IC1601, and pins 1 and 3 of CNS1101 in the TEST mode focus gain adjustment step?No Check the soldering joint of pins 20 and 21 of IC1201, IC1601, IC1601, CNS1101. · Slide servo failure Does the pickup move to external and internal periphery when the or button is pressed in the TEST mode?No Is there any change on the pins 22 and 23 of IC1201 when the or button is pressed?Check the waveform on the pins 22 and 23 of IC1201, check the peripheral parts and soldering joint. Yes Check the waveform on the pins 22 and 23 of IC1201, check the peripheral parts and soldering joint. No Yes Is there any change on the pins 28 and 29 of IC1601, and the pins 1 and 2 of CNP1602 when the or button is pressed?Yes Does voltage on the positive and negative terminals of slide motor change when the or button is pressed?Check the soldering joint connected to the slide motor to see whether there is wire breakage. Check the soldering joint of IC1601 and CNP1602. No No 23 DM-3090 ADJUSTMENT MD SECTION 1. Preparation for adjustment Test disc Type 1 2 3 Test disc High reflection disc TGYS1 (SONY) Low reflection disc Recording minidisc Head Adjusting transparent 2. Test mode Test mode setting method (PLAY/PAUSE) button, press the RESET button. Holding down the ENTER button and After 3sec, take your hand off the RESET button first. Insert the playback disc 1 (high reflection disc) or recording disc 2 (low reflection disc). (During disc loading : display LOADING) (State C is set. ) Thus, the test mode state is set. A tsm e : TEST MODE represents version of MD microcomputer. TEST STOP state (When the (STOP) button is ressed in the C state, the indication A is restored. To restore C again, press the ENTER button. ) B EJECT TEST C AUTO TEST Entering the specific mode Whenever the ENTER button is pressed, the mode is changed. [. . . ] 8 Hz ~ 20 kHz, ± 1 dB Signal to noise ratio (playback mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . More than 100 dB Wow & flutter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Less than unmeasurable limit Analog input sensitivity / input impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0. 5V / 22 k or more Analog output level/output impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ]