SRF-HM01V - Sony Audio Service Manual (repair manual)

Model
SRF-HM01V
Pages
26
Size
960.52 KB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
srf-hm01v.pdf
Date

View Sony SRF-HM01V Service Manual online

SERVICE MANUAL
TV/WEATHER/FM STEREO/AM
PLL SYNTHESIZED HEADPHONE RADIO
US Model
SPECIFICATIONS
SRF-HM01V
Ver 1.0  2002.02
9-873-563-01
Sony Corporation
2002B0500-1
Personal Audio Company
C
 2002.02
Published by Sony Engineering Corporation
Time display: 12-hour system
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. 136 g (4.7 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.
2
SRF-HM01V
TABLE  OF  CONTENTS
1.
GENERAL
...................................................................
3
2.
DISASSEMBLY
2-1. Disassembly Flow ...........................................................
4
2-2. MICROCOMPUTER Board ...........................................
4
2-3. MAIN Board ...................................................................
5
2-4. BATTERY Board ............................................................
5
2-5. Putting the Sheet (A) .......................................................
6
3.
ELECTRICAL  ADJUSTMENTS
.........................
7
4.
DIAGRAMS
4-1. Block Diagram  – TUNER Section – .............................
9
4-2. Block Diagram  – MAIN Section – ................................ 10
4-3. Note for Printed Wiring Boards
and Schematic Diagrams ................................................ 11
4-4. Printed Wiring Board
– MAIN Board (Component Side) – .............................. 12
4-5. Printed Wiring Board
– MAIN Board (Conductor Side) – ................................ 13
4-6. Printed Wiring Board  – BATTERY Board – ................. 14
4-7. Schematic Diagram  – BATTERY/MAIN Boards – ...... 15
4-8. Printed Wiring Board
  – MICROCOMPUTER Board (Component Side) – .... 16
4-9. Printed Wiring Board
  – MICROCOMPUTER Board (Conductor Side) – ...... 17
4-10. Schematic Diagram
  – MICROCOMPUTER Board – ................................... 18
4-11. IC Pin Function Description ........................................... 20
5.
EXPLODED  VIEWS
5-1. Cabinet (R) Section ......................................................... 21
5-2. Board Section .................................................................. 22
5-3. Cabinet (L) Section ......................................................... 23
6.
ELECTRICAL  PARTS  LIST
............................... 24
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270 ˚C dur-
ing repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
3
SRF-HM01V
SECTION  1
GENERAL
This section is extracted from
instruction manual.
POWER ON/OFF
Hook (L, R)
Driver Unit
TUNE +*
2
/–
Display
MEGA BASS/CLOCK
ENTER
MODE
BAND
VOL*
1
TV/WB/FM SENS
DX/LOCAL
L
 (Left)
R
 (Right)
Hang the hooks on
your ears.
Neckband
Neckband
Battery compartment lid
Light reflector (R, L)
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.
*
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.
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.
3
Press TUNE + or  to adjust the hour, then press MEGA
BASS/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).
Note
If you do not press TUNE + or , or MEGA BASS/CLOCK within one
minute, the clock setting mode will be canceled.
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.
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.
1
Set POWER  to OFF to turn off the power.
2
While holding down MODE, hold down TUNE + or  for
more 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 2 again, the channel step changes again.
SRF-HM01V
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.
MICROCOMPUTER  BOARD
2-2. Microcomputer 
Board 
(Page 4)
2-4. Battery 
Board 
(Page 5)
2-3. MAIN Board
(Page 5)
2-5 . Putting the Sheet (A)
(Page 6)
SET
5
rubber key switch
4
MICROCOMPUTER board
2
cabinet (front) (R) assy
3
claw
3
claw
1
four screws
(1.7 
×
 10)
SRF-HM01V
5
2-3.
MAIN  BOARD
2-4.
BATTERY  BOARD
3
MAIN Board
2
claw
2
claw
lever (A)
S1
1
Remove nine solders.
Note: When installing MAIN board, 
fit lever (A) and switch (S1).
1
four screws
(1.7 
×
 10)
4
claw
3
Remove eleven solders.
Note: When installing BATTERY board, 
fit lever (A) and switch (S401).
5
BATTERY board
2
front cabinet (L) assy
4
claw
lever (A)
S401
SRF-HM01V
6
2-5.
PUTTING  THE  SHEET (A)
Put the sheet (A) positioning its corner to the corner of C26
in the main board so that the pin of CF2 is completely covered.
C26
CF2
IC
main board
7
SRF-HM01V
SECTION  3
ELECTRICAL  ADJUSTMENTS
AM  VCO  VOLTAGE  ADJUSTMENT
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
L4
530 kHz
1.30 
±
 0.05 V
Confirmation
1710 kHz
8.10 
±
 1.00 V
AM  TRACKING  ADJUSTMENT
Adjust for a maximum reading on level meter
L3
590 kHz
CT3
1490 kHz
FM  VCO  VOLTAGE  ADJUSTMENT
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
Confirmation
TV 2ch (59.75 MHz)
1.91 
±
 0.50 V
Confirmation
108.0 MHz
11.70 
±
 1.00 V
FM  TRACKING  ADJUSTMENT
Adjust for a maximum reading on level meter
L2
TV 2ch (59.75 MHz)
CT2
108.0 MHz
TV  VCO  VOLTAGE  ADJUSTMENT
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
Confirmation
WEATHER 2ch
3.00 
±
 0.50 V
(162.4 MHz)
Confirmation
TV 13ch
8.10 
±
 1.00 V
(215.75 MHz)
TV  TRACKING  ADJUSTMENT
Adjust for a maximum reading on level meter
CT1
TV 10ch (197.75 MHz)
0 dB=1 
µ
V
[AM]
Setting:
BAND: AM
[FM/TV]
Setting:
BAND: FM, TV or WEATHER
• Repeat the procedures in each adjustment several times for a
maximum reading on level meter.
• Remove FM wire antenna in FM adjsutments.
Adjustment Location:
AM RF signal 
generator
30% amplitude
modulation by
400 Hz signal
Output level: as low as possible
Put the lead-wire
antenna close to 
the set.
+
level meter
set
16 
headphone
FM RF signal
generator
22.5 kHz frequency
deviation by 400 Hz
signal
Output level: as low as possible
+
level meter
headphone
set
16 
0.01 
µ
F
TP (ANT)
+
digital voltmeter
MAIN board
TP (VT)
TP (GND)
– MAIN Board (Conductor Side) –
TP
(ANT)
TP
(GND)
TP
(VT)
IC201
CT1
TV Tracking
Adjustment
L4
AM VCO Voltage Adjustment
L3
CT3
AM Tracking Adjustment
L2
CT2
FM Tracking Adjustment
SRF-HM01V
9
9
SECTION  4
DIAGRAMS
4-1.
BLOCK  DIAGRAM  – TUNER Section –
14
LPF1
21
MODE1
22
MODE2
52
BAND1
53
BAND2
50
MONO/ST
38
OSC IN
23
OSC OUT
40
D0
13
16
MPX IN
12
DET OUT
AF
AMP
8
FM IF IN
10
AM IF IN
AM
DET
AM IF
AMP
FM IF
AMP
FM
DET
4
FM MIX
2
FM RF IN
1
TV RF IN
FM/TV
MIX
24
TV/FM OSC
30
TV RF OUT
29
FM RF OUT
D1
TV
TRACKING
CT1
L5
TV/FM
OSC
L2
FM RF
D4
D5
D2
CT2
FM TRACKING
CT2, L2
B. P. F.
BPF1
AM BAND
SWITCHING
Q2
FM WIRE
ANTTENA
TUNER
B+
TV/WB/FM
SENS
S1
LOCAL
DX
27
AM RF IN
AM RF
BUFFER
Q5
30
AM BAND
AM BAND
SWITCHING
Q6, 7
LOW-PASS
FILTER
Q301, 302
L3
AM FERRITE-ROD
ANTTENA
AM TRACKING
CT3, L3
D3
L4
AM OSC
AM VCO VOLTAGE
L4
BUFFER
AM
MIX
5
AM MIX
25
AM OSC
OSC
OSC
CF3
450kHz
CF2
10.7MHz
FM/AM/TV
POWER
SWITCH
FM
MPX
MONO/ST
SWITCHING
Q4
AM BAND
SWITCHING
Q3
15
BUFFER
Q8
11
QUAD
CF4
10.7MHz
SIGNAL PATH
: FM/TV (2 
 6ch)
: TV (7 
− 
13ch) /WEATHER
: AM
LOUT
ROUT
A
FM/TV FRONT-END,
FM/AM IF AMP,
FM MPX
IC1
SYSTEM CONTROLLER
IC301 (1/2)
LOUT
ROUT
TV/FM/WB
RF AMP
Q1
(Page 10)
DX/LOCAL
SWITCHING
Q9
SRF-HM01V
10
10
4-2.
BLOCK  DIAGRAM  – MAIN Section –
27
IN-L
26
NF-L
+
28
IN-R
29
NF-R
+
A
LOUT
ROUT
1
2
VOL
AGC
DET
+
22
OUT-L
20
OUT-R
21
OUT-C
32
IN-C
33
BST OUT
35
AGC IN
SP1
(HEADPHONE)
L
SP2
(HEADPHONE)
R
19
VCC
18
BASE
17
RFOUT
RIPPLE
FILTER
RIPPLE
FILTER
Q103
DC/DC
CONVERTER
Q201, 202, T201
VT
LOW-PASS
FILTER
CIRCUIT
B+
D201
RESET SIGNAL
GENERATOR
IC303
27
VDD
39
VDD
34
POWER SW
42
POWER ON2
28
BEEP
54
RESET
B+ SWITCH
Q303
BATT2
PAS
SECONDARY
BATTERY
(SL-621-F11N)
D301
43
BST SW
42
PW SW
41
MT SW
SWITCH
31
MUTE
51
POWER ON1
D302
35
INT1
BATTERY
VOLTAGE
DETECT
IC302
MEGA BASS
ON/OFF
SWITCH
Q101
MEGA BASS
CONTROL
SWITCH
Q102
MEGA BASS
ON/OFF
SWITCH
Q104
29
MEGA BASS
POWER
S401
ON
OFF
DRY BATTERY
SIZE "AAA"
(IEC DESIGNATION R03)
1PC.  1.5V
23 
 25
KR1 
 KR3
21, 22
KS1, KS2
S301 
 306
 4
COM1 
 COM2
LIQUID CRYSTAL
DISPLAY
LCD1
 15
S1
 S11
56 XIN
55 XOUT
X301
7.5kHz
SYSTEM CONTROLLER
IC301 (2/2)
AUDIO MASTER AMP
IC201
SIGNAL PATH
: FM/TV (2 
 6ch)
RV101
TUNER
TUNER CIRCUIT
B+
(Page 9)
SRF-HM01V
11
11
4-3.
NOTE  FOR  PRINTED  WIRING  BOARDS  AND  SCHEMATIC  DIAGRAMS
Note on Schematic Diagram:
• All capacitors are in 
µ
F unless otherwise noted.  pF: 
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in 
 and 
1
/
4
 
W or less unless otherwise
specified.
C
: panel designation.
A
: B+ Line.
H
: adjustment for repair.
• Power voltage is dc 1.5 V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM/TV (2-6 ch)
(
) : TV (7-13 ch)/WEATHER
〈〈
 
〉〉
: AM
• Voltages are taken with a VOM (Input impedance 10 M
).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM/TV (2-6 ch)
L
: TV (7-13 ch)/WEATHER
f
: AM
Note on Printed Wiring Boards:
X
: parts extracted from the component side.
Y
: parts extracted from the conductor side.
z
: Through hole.
: Pattern from the side which enables seeing.
: Carbon pattern.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side:
Parts on the pattern face side seen from
(Conductor Side)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(Component Side)
the parts face are indicated.
• Waveforms
– MAIN Board –
1
Q201 (Collector)
2
Q201 (Base), Q202 (Collector)
– MICROCOMPUTER Board –
3
IC301 
th
 (XIN)
1.8 Vp-p
248 ns
0.6 Vp-p
248 ns
1.2 Vp-p
13.3 
µ
s

Download Sony SRF-HM01V Service Manual (Repair Manual)

Here you can view online and download Sony SRF-HM01V Service Manual in PDF. SRF-HM01V service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony SRF-HM01V Audio. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.