Sony MHC-V41D Service Manual

MHC-V41D
37
SECTION 4
ELECTRICAL CHECKS
TUNER SECTION
0 dB = 1 V
FM AUTO STOP CHECK
signal
generator
unit
Procedure:
1. Press the [
1
] button to turn the power on.
2. Input the following signal from signal generator to FM antenna
input directly.
Carrier frequency : A = 87.5 MHz, B = 98 MHz, C = 108 MHz
Deviation : 75 kHz
Modulation : 1 kHz
ANT input : 35 dBu (EMF)
Note: Use 75 ohm coaxial cable to connect signal generator and the unit.
You cannot use video cable for checking.
Use signal generator whose output impedance is 75 ohm.
3. Press the [FUNCTION] button to select the “TUNER FM”
function and scan the input FM signal with automatic scan-
ning.
4. Confi rm that input frequency of A, B and C detected and auto-
matic scanning stops.
When the station signal is received in good condition, automatic
scanning stops.
DVD/CD SECTION
Note:
1. DVD/CD block is basically constructed to operate without adjustment.
2. Use YEDS-18 disc (Part No. 3-702-101-01) unless otherwise indicat-
ed.
3. Use an oscilloscope with more than 10 M impedance.
4. Clean the object lens by an applicator with neutral detergent when the
signal level is low than specifi ed value with the following check.
RF SIGNAL CHECK
+
–
MOTHER board
CN302 pin 17 (RF)
CN302 pin 1 (GND)
oscilloscope
(DC range)
Procedure:
1. Connect the oscilloscope to CN302 pin 17 (RF) and CN302
pin 1 (GND) on the MOTHER board.
2. Press the [
1
] button to turn the power on.
3. Press the [FUNCTION] button to select the “DVD/CD” func-
tion.
4. Press the [Z] button to open the disc tray and set the disc
(YEDS-18).
5. Press the [Z] button to close the disc tray.
6. Press the [
N
] button to playback.
7. Confi rm that oscilloscope waveform is as shown in the fi gure
below. (eye pattern)
A good eye pattern means that the diamond shape () in the
center of the waveform can be clearly distinguished.
VOLT/DIV: 200 m
V
TIME/DIV: 500 ns
level: 1.0 ± 0.25 Vp-p
Connection Location:
pin 17 (RF)
pin 1 (GND)
CN302
IC109
IC2001
– MOTHER Board (Side A) –

Sony MHC-V41D Specifications

General

Cassette deck	No
Product color	Black
Number of decks	1 deck(s)
Disc loading type	Tray
Optical disc player	Yes
Number of optical discs	1 discs
Coloration	Monochromatic
Bluetooth profiles	A2DP, AVRCP, SPP
Illumination location	Front
Number of microphone inputs	2
Audio decoders	Dolby Digital
RMS rated power	- W
Woofer diameter	250 mm
Tweeter diameter	40 mm
Number of speakers	1
Mid-range driver diameter	80 mm
Disc types supported	CD, CD-R, CD-RW, DVD, DVD+R, DVD+R DL, DVD+RW, DVD-R, DVD-RW
Playback disc formats	DVD-Video, VCD
Audio formats supported	MP3
Video formats supported	MPEG4, XVID
USB 2.0 ports quantity	USB 2.0 ports have a data transmission speed of 480 Mbps, and are backwards compatible with USB 1.1 ports. You can connect all kinds of peripheral devices to them.
FM band range	87.5 - 108 MHz
Supported radio bands	FM
Preset stations quantity	20
Power source	AC
Power consumption (standby)	0.5 W

Weight and Dimensions

Depth	308 mm
Width	328 mm
Height	796 mm
Weight	13500 g