View Sony HCD-DX90 / MHC-DX90 Service Manual online
amplifier section in MHC-DX90.
MD/VIDEO (AUDIO) IN: voltage 450 mV/250 mV,
measured at a distance of
200 mm from the
objective lens surface on
the Optical Pick-up Block
with 7 mm aperture.
(Square optical connector jack, rear panel)
40 – 14,000 Hz (
(with the interval set at 9
530 – 1,710 kHz
(with the interval set at 10
DIN power output (rated) 220 + 220 watts
(4 ohms at 1 kHz,
V AC, 50/60 Hz
Adjustable with voltage
(24 lb. 5 oz)
Remote commander (1)
FM lead antenna (1)
Front speaker pads (8)
CLASS 1 LASER PRODUCT MARKING is located on the rear
of emitting radiation exceeding the limit for
other than those specified herein may result in hazardous radiation
• Notice that the minus side of a tantalum capacitor may be
BLOCK OR BASE UNIT
break-down because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
The flexible board is easily damaged and should be handled with
the disc reflective surface by the objective lens in the optical pick-
up block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.
CD Mechanism Deck (CDM58-K2BD38) ························· 8
3-11. Driver Board, Motor Board, Sensor Board ······················ 11
7-11. Printed Wiring Board – Panel Section – ··························· 32
7-12. Schematic Diagram – Panel Section – ····························· 33
7-13. Printed Wiring Board – Leaf SW Section – ···················· 34
7-14. Schematic Diagram – Leaf SW Section – ························ 35
7-15. Printed Wiring Board – Driver Section – ························· 36
7-16. Schematic Diagram – Driver Section – ···························· 37
7-17. Printed Wiring Board – Trans Section – ··························· 38
7-18. Schematic Diagram – Trans Section – ····························· 39
7-19. IC Pin Function Description ············································· 40
7-20. IC Block Diagrams ··························································· 42
eleven screws (
Do not tighten the screws excessively.
time while the power is off. To change the time
while the power is on, do the following:
1 Press CLOCK/TIMER SET.
2 Press . or > repeatedly to select
4 Perform steps 2 through 5 above.
the power cord or if a power failure occurs.
European model and a 12-hour system for