Kenwood DM-3090 Service Manual

DM-3090
24
ADJUSTMENT
1. Preparation for adjustment
Test disc
MD SECTION
Type Test disc
1 High reflection disc TGYS1 (SONY)
2 Low reflection disc Recording minidisc
3 Head Adjusting transparent
2. Test mode
Test mode setting method
1. Holding
After 3sec, take your hand off the RESET button first.
down the ENTER button and
(PLAY/PAUSE) button, press the RESET button.
(State A is changed to state B .)
2. Insert the playback disc 1 (high reflection disc) or recording disc 2 (low reflection disc).
(State C is set.)
(During disc loading : display LOADING)
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 button ENTER is pressed, the mode is changed.
AUTO pre-adjustment AUTO adjustment RESULT SUB RESULT
EEPROM setting MANUAL adjustment MANUAL pre-adjustment
• Canceling the test mode
When the POWER button is pressed, the test mode is canceled, and the POWER OFF state is set.
• Test Mode
1. AUTO pre-adjustment mode • Automatic pre-adjustment is performed. (After adjustment the grating adjustment mode is set.)
• The adjustment value is output with the aid of system controller interface.
2. AUTO adjustment mode • Automatic adjustment is performed.
• The adjustment value is output with the aid of system controller interface.
• Continuous playback is performed. (Error rate indication, jump test)
3. RESULT sub-mode • The measurement value, set value and calculated value are indicated.
• The set value is changed manually (in servo OFF state).
4. RESULT mode (final adjustment) • The set value (after calculation) is indicated.
• The set value is changed manually (in servo OFF state).
5. MANUAL pre-adjustment mode • RF side manual adjustment is performed.
• Focus and tracking signal ATT manual adjustment is performed.
• Focus and tracking signal offset setting is performed.
6. MANUAL adjustment mode • Focus and tracking signal ATT manual adjustment is performed.
7. EEPROM setting mode • This mode does not use on the occasion of service.
8. TEST-PLAY mode • Continuous playback from the specified address is performed.
• C1 error rate measurement, ADIP error rate measurement.
9. TEST-REC mode • Continuous recording from the specified address is performed.
• Change of record laser output (servo gain is also changed according to laser output)
10. EJECT mode • TEMP setting (of EEPROM setting)
• CONTROL setting (of EEPROM setting)
• Setting of laser power (record/playback power)
DM-3090(K) COVER 97.11.29 0:20 AM y[W 35

Kenwood DM-3090 Specifications

Digital Audio Performance

frequency response (playback mode)	8 Hz ~ 20 kHz, ± 1 dB
signal to noise ratio (playback mode)	More than 100 dB
wow & flutter	Less than unmeasurable limit

Analog Specifications

analog input sensitivity / input impedance	0.5V / 22 kΩ or more
analog output level/output impedance	2.0 V / Less than 2 kΩ
headphone output	15 mW/32 Ω load

Digital Input/Output

digital input coaxial	0.5 Vp-p / 75 Ω
digital input optical	- 15 dBm ~ - 21 dBm
digital output optical	- 15 dBm ~ - 21 dBm

General Specifications

power consumption	17 W
dimensions width	440 mm (17 - 5 / 16”)
dimensions height	94 mm (3 - 11 / 16”)
dimensions depth	300 mm (11 - 13 / 16”)

Weight

weight	3.55 kg (7.9 lb)