Sony SRF-HM03V Service Manual ▷ View online
SERVICE MANUAL
TV/WEATHER/FM STEREO/AM
PLL SYNTHESIZED HEADPHONE RADIO
US Model
SPECIFICATIONS
SRF-HM03V
Ver 1.0 2004.04
9-877-737-01
Sony Corporation
2004D05-1
Personal Audio Company
© 2004.04
Published by Sony Engineering Corporation
Time display: 12-hour system
Frequency range:
Frequency range:
Band
Range
Channel step
TV
2 - 13 ch
1 channel
WEATHER
1 - 7 ch
1 channel
FM
87.5 - 108 MHz
0.1 MHz
AM
530 - 1 710 kHz
10 kHz
531 - 1 710 kHz
9 kHz
Headphone type: Dynamic
Power output: 7 mW + 7 mW (at 10 % harmonic distortion)
Power requirements: 1.5V DC, one size AAA (R03) battery
Mass: Approx. 156 g (5.6 oz) incl. a battery
Power output: 7 mW + 7 mW (at 10 % harmonic distortion)
Power requirements: 1.5V DC, one size AAA (R03) battery
Mass: Approx. 156 g (5.6 oz) incl. a battery
Design
Supplied accessories: Operating instructions
and specifications are subject to change without notice.
Battery Life (Approx. hours)
(JEITA*)
TV
WEATHER
FM
AM
Sony alkaline size AAA (LR03) battery
33
33
37
57
Sony size AAA (R03) battery
14
14
16
26
* Measured by JEITA (Japan Electronics and Information Technology
Industries Association) standards.
The actual battery life may vary depending on the circumstance of the
unit.
The actual battery life may vary depending on the circumstance of the
unit.
2
SRF-HM03V
TABLE OF CONTENTS
1.
GENERAL
...................................................................
3
2.
DISASSEMBLY
2-1. Disassembly Flow ...........................................................
4
2-2. POWER Board ................................................................
4
2-3. Cable Setting ...................................................................
5
2-4. MICON Board, MAIN Board .........................................
5
2-5. Putting the Sheet (A) .......................................................
6
3.
ELECTRICAL ADJUSTMENTS
.........................
7
4.
DIAGRAMS
4-1. Note for Printed Wiring Boards
and Schematic Diagram ..................................................
8
4-2. Schematic Diagram .........................................................
9
4-3. Printed Wiring Boards – MAIN/POWER Boards – ...... 10
4-4. Printed Wiring Board – MICON Board – ..................... 11
4-4. Printed Wiring Board – MICON Board – ..................... 11
5.
EXPLODED VIEWS
5-1. Cabinet (L) Section ......................................................... 14
5-2. Cabinet (R) Section ......................................................... 15
5-3. Board Section .................................................................. 16
5-2. Cabinet (R) Section ......................................................... 15
5-3. Board Section .................................................................. 16
6.
ELECTRICAL PARTS LIST
............................... 17
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
3
SRF-HM03V
SECTION 1
GENERAL
This section is extracted from
instruction manual.
instruction manual.
POWER ON/OFF
Driver Unit
TUNE +*
2
/—
Display
MEGA BASS/CLOCK
ENTER
MODE
BAND
VOL*
1
TV/WB/FM SENS
DX/LOCAL
DX/LOCAL
R (Right)
L (Left)
Battery
compartment lid
compartment lid
Light reflector (L)
This reflector
reflects car lights
at night for your
safety.
This reflector
reflects car lights
at night for your
safety.
*
1
There is a tactile dot beside volume to show the
direction to turn up the volume.
direction to turn up the volume.
*
2
The TUNE + button has a tactile dot.
Setting the Clock
The clock time display of this unit is a 12-hour system.
When the battery is first installed, AM 12:00 flashes in the display.
When the battery is first installed, AM 12:00 flashes in the display.
1
Set POWER to OFF to turn off the power.
2
Hold down MEGA BASS/CLOCK for more than 2 seconds
until AM 12 starts flashing.
until AM 12 starts flashing.
3
Press TUNE + or – to adjust the hour, then press MEGA BASS/
CLOCK.
CLOCK.
If you hold down
TUNE + or —, the digit changes rapidly.
AM 12:00 = midnight, PM 12:00 = noon.
4
Repeat step 3 above to adjust the minute.
: starts flashing and the clock starts operating.
To set the current time exactly to the second, adjust the minute and then press
MEGA BASS/CLOCK to synchronize with a time signal (such as the
telephone time signal).
MEGA BASS/CLOCK to synchronize with a time signal (such as the
telephone time signal).
Note
If you do not press
If you do not press
TUNE + or —, or MEGA BASS/CLOCK within one minute,
the clock setting mode will be canceled.
Wearing the Headphone
Radio
Radio
(See fig
A)
1
Wear the
L side driver unit in your left ear and the R side in your
right ear as illustrated.
2
Adjust the position of the driver units for a comfortable fit.
Changing AM Channel Step
The AM channel step differs depending on areas. The channel step of this unit is
factory-set to 10 kHz. Change the settings as shown below to be able to listen to
the radio.
factory-set to 10 kHz. Change the settings as shown below to be able to listen to
the radio.
Area
Channel step
North and South American countries
10 kHz
Other countries
9 kHz
Note
When the AM channel step is changed, only the preset stations on the AM band
will be initialized.
When the AM channel step is changed, only the preset stations on the AM band
will be initialized.
1
Set POWER to OFF to turn off the power.
2
While holding down MODE, hold down TUNE + or – for more
than 5 seconds.
than 5 seconds.
The channel step will change and 9 kHz (or 10 kHz) will flash for 3
seconds in the display.
If you proceed to step
seconds in the display.
If you proceed to step
2 again, the channel step changes again.
Light reflector (R)
A
SRF-HM03V
4
• This set can be disassembled in the order shown below.
2-1.
DISASSEMBLY FLOW
SECTION 2
DISASSEMBLY
Note:
Follow the disassembly procedure in the numerical order given.
2-2.
POWER BOARD
2-2. POWER
BOARD
(Page 4)
2-4. MICON
BOARD,
MAIN BOARD
(Page
5)
2-5. PUTTING THE
SHEET (A)
(Page 6)
(Page 6)
2-3. CABLE SETTING
(Page 5)
SET
1
six screws
(1.7)
(1.7)
8
Remove the eleven solders.
4
three screws
(B1.4)
(B1.4)
3
two screws
(1.7)
(1.7)
5
cabinet assy front (L)
6
screw (B1.4)
9
screw (B1.4)
0
POWER board
7
lid (PWB BATT)
2
S401
knob
POWER board
red
yerrow
white
gray
red
natural
black
black
blue
blue
green
Note: When installing the POWER board, fit the knob and switch (S401).