Sony S2 Sports Walkman SRF-HM01V User manual

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
C2002.02 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 - 1 8 MHz .1 MHz
AM 53 - 1 71 kHz 1 kHz
531 - 1 71 kHz 9 kHz
Headphone type: Dynamic
Power output: 7 mW + 7 mW (at 1 % harmonic distortion)
Power requirements: 1.5V DC, one size AAA (R 3) 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 (LR 3) battery 33 33 37 57
Sony size AAA (R 3) 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.
*1There is a tactile dot beside volume to show
the direction to turn up the volume.
*2The 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: ” 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: ”= midnight, “PM 12: ”= 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 1 kHz. Change the settings as shown below to be
able to listen to the radio.
Area Channel step
North and South American countries 1 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 “1 ” 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 µV
[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 mete
r
set
16 Ω
headphone
FM RF signal
generator
22.5 kHz frequency
deviation by 400 Hz
signal
Output level: as low as possible
+
–
level mete
r
headphone
set
16 Ω
0.01 µF
TP (ANT)
+
–
digital voltmete
r
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

8
SRF-HM01V
MEMO

SRF-HM01V
99
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
D4D5D2
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
1010
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
35INT1
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
1 −4
COM1 −COM2
LIQUID CRYSTAL
DISPLAY
LCD1
5 −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
1111
4-3. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ωand 1/4W or less unless otherwise
specified.
•C: panel designation.
•A: B+ Line.
•H: adjustment for repair.
• Powervoltageisdc 1.5V andfedwithregulated dcpower
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 aretaken withaVOM(Input impedance10MΩ).
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: Partsonthepatternface sideseen 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 –
1Q201 (Collector)
2Q201 (Base), Q202 (Collector)
– MICROCOMPUTER Board –
3IC301 th (XIN)
1.8 Vp-p
248 ns
0.6 Vp-p
248 ns
1.2 Vp-p
13.3 µs

SRF-HM01V
1212
4-4. PRINTED WIRING BOARD – MAIN Board (Component Side) –
R117
R112
R113
R106
R105
C115
C32
R116
C106
CN1
C123 C107
C105
C41
C103 C31
R15
C33
C102
C34
R102
R7
C11
C35
C30
C29
C28
CF2
C26
C27
C16
C14
C45
R12
C17
C15
C8
L1
L5
R9
R22
C9
R6
C36
C7
C6
R1
C3 C2
R13
R29
R30
C37
C23
C5
R2
R4
R3
R31
R14
C25
ECB
Q4
Q3
ECB
Q9
ECB
ECB
Q2
Q1
ECB
A
K
A
D3
D
G
S
Q5
D5
D2
KA
KA
D4
AK
AK
D1
IC1
(11)
11
1-683-611-
MAIN BOARD (COMPONENT SIDE)
SP2
(HEADPHONE)
FM WIRE
ANTENNA
NGND
N+B
R+B
B+B
SW
COM
LCH
B
BATTERY BOARD
15 1
16 30
L3
AM FERRITE-ROD
ANTENNA
110
20 11
R
A
B
C
D
E
F
2 3 4 5 6 7 8 91
++
A
MICROCOMPUTER
BOARD
CN301
(Page 14)
• Semiconductor
Location
Ref. No. Location
D1 E-8
D2 E-8
D3 E-6
D4 E-7
D5 E-8
IC1 C-7
Q1 D-8
Q2 B-8
Q3 C-6
Q4 C-5
Q5 F-7
Q9 C-8
(Page 17)

SRF-HM01V
1313
4-5. PRINTED WIRING BOARD – MAIN Board (Conductor Side) –
L10
R25
C101
R16
R107
C122
C109 C104
C121
CF4
R35
C43
CF3
C4 C19
C39
R34
R8
R5
C46
C21
R101
C108
R108
R104
R103
L8
C18
L7
L2
L9
C38
C10
C44
C47
R33
R26
R27
C12
C40
C111
C110
R115
R114
L4
C42
C119R111
R110 R109
C118 C117
C114 C120
C113
C116
C206
C205R204
R203
C202
R201
R207
R202 C203
C204
C201
T201
IC201
ECB
Q7
Q6
ECB
Q103
E
C
B
ECB
ECB
Q201
Q202
D202
AK KA
D201
Q104
BCE
Q102
BCE
Q8
BCE
Q101
(11)
11
1-683-611-
MAIN BOARD (CONDUCTOR SIDE)
TP
(ANT)
TP
(GND)
5
1
BPF1
CT2
TP
(VT)
CT3
C2
C1 B1
E
B2 36
25
1
12
37 48
24 13
+ +
+
+
+
TV/WB/FM SENS
S1
LOCAL
DX
+
RV101
−1
VOL
A
B
C
D
E
F
1 2 3 4 5 6 7 8 9
CT1
−2
• Semiconductor
Location
Ref. No. Location
D201 C-8
D202 C-7
IC201 C-6
Q6 D-3
Q7 C-3
Q8 E-5
Q101 D-4
Q102 D-5
Q103 B-6
Q104 D-6
Q201 C-7
Q202 C-7

SRF-HM01V
1414
4-6. PRINTED WIRING BOARD – BATTERY Board –
(Page 12)
(11)
11
1-683-364-
BATTERY BOARD
SP1
(HEADPHONE)
L
S401
POWER
OFF ON
B+B LCH COM NGND N+B R+B SW
B
MAIN BOARD
DRY BATTERY
SIZE "AAA"
(IEC DESIGNATION R03)
1PC. 1.5V

SRF-HM01V
1515
C28
R15
R12 R13
C37
R29
R30
R31 Q3
Q4
R16
R27C41C47
R26
C16C14
C15
C17
D4
C21
C36 L7C19
C40
L4
C11
C35
C10C38
R22
C44
L9
C9
D3
R34
Q5
R6
C8
R3 C46
D2
D5
CT2
C7C5
R4R2
C3
R1
CT1 C4 C39 C45
C29
C27
R9
Q7
Q6
C101
C102
C103
C105
R107 R108
C108 C109
C110
C121
C122
C123
C117
C118
C119
R109
R110
R111
C201
C202
C203
D202
R203
R204
C204
C205
C206
Q201 Q202
R101
R102
D1
R115
C115
C6
C2
R112
R113
C120
Q102
C25
C26C43
R14
C42
R8R5
R33
C34
R35 L8
C33
R207
R117
C111
R116
C23
L10
R25
R106 C107
C116
SP1
SP2
S401
Q104
R201D201
IC201
Q103
RV101
Q101
IC1
Q8
L5
L2
C12
R7
L1
S1
BPF1
Q9
Q2
TP
CF2
CF3
CF4
T201
CN1
TP
L3
C31
C30
C104
R104
R103
C106
R105
R114
C113
C114
TP
C32
CT3
C18
R202
Q1
330p
1k
33k 150
0.01
100
10k
470k UN9210
UN9210
47k
2200.010.01
22k
2p1000p
100p
33p
HVU300A
0.1
0.01 0.01
5p470p
15p
0.012p
100
15p
47p
KV1610S
1k
2SK209
150
1
100k 100p
HVU300A
HVU300A
10p
1p1000p
100k100k
330p
100k
10p 1p 1000p 100p
1
1
100k
UN9210
2SB1462
1
1
0.22
1
10k 10k
0.022 0.022
1
2200p
2200p
1000p
0.47
0.47
0.47
2.2
2.2
2.2
0.33
5p
10p
MA8130
100k
47k
0.1
1
10
4V2SD2216 2SD2216
22k
22k
HVU300A
470k
1
1000p
1000p
4.7k
4.7k
4.7
4V
UN9210
4.7
4V
100
4V
470
2.5V
10k
0.01
220k10k
100
4700p
2.2
4700p
10
10k
1
0
1000p
0
220k 0.1
22
4V
UN9115
1kMA2S111
TA2123AF
2SB1689
20k/20k
XP1116
TA2154FN
2SC4627
27nH
22p
100k
18nH
2SC4627
2SB1462
(ANT)
10.7MHz
450KHz
10.7MHz
20P
(GND)
0.47
0.01
0.33
0
0
2.2 6.3V
10k
100k
2.2 4V
22 6.3V
(VT)
0.068
10p
0.01
47k
2SC4627
C1
C2
C5
C4
C3
D2
D3
D4
D0
C1
C2
C3
C5
C4
C4
D1
D0
D1
D2
D3
D4
GND
GND
BATT
POWER SW
BEEP
POWER
OSC
F.GND
MUTE
MEGABASS
AM BAND
MONO/ST
FM BAND
BAND2
BAND1
D/D
VT
LOW
GND
COM
GND
HIGH
AM OSC
LOUT
LPF2A
LPB2B
COUNT
IF
REQ
IF
MODE1
MODE2
OUT
OSC
OSC
TV/FM
OSC
AM
VCC
RF
IN
AM RF
BYPASS
AM
OUT
FM RF
TV
RF OUT
TV
RF IN
FM RF
IN
RF
GND
FM
MIX
AM
MIX
AGC
VCC
FM IF
IN
GND
AMIF
IN
QUAD
DET
OUT
MPX
IN
LPF1
ROUT
RF IN
PW GND
OUT-L
OUT-C
OUT-R
VCC
BASE
RF OUT
GND
AMS
AMS
AMS
AMS IN
NF
OUT
MTL
MTL
OUT
NF
IN
IN
REF OUT
IN
IN
EQ-L
NF-L
IN-L
IN-R
NF-R
EQ-R
LPF
IN-C
BST OUT
BST NF
AGC IN
AGC DET
MT TC
BEEP
AMSOUT
MT SW
PW SW
BST SW
F/R SW
PRE SW
M/N SW
PRE GND
VREF IN
CAMP
SW
FM WIRE
ANTENNA
(HEADPHONE)
L
(HEADPHONE)
R
POWER
ON OFF
DRY BATTERY
1PC. 1.5V
SIZE"AAA"
(IEC DESIGNATION R03)
MEGA BASS
SWITCH
ON/OFF
AUDIO MASTER AMP
RIPPLE
FILTER
VOL
-2
-1
MEGA BASS
SWITCH
MEGA BASS
SWITCH
ON/OFF
CONTROL
-1 -2
FM/TV FRONT-END,
FM/AM IF AMP,
FM MPX
AM BAND
SWITCHING
AM BAND
SWITCHING
Q6,7
BUFFER
FM/TV
OSC
RF
FM
AM RF
BUFFER
S
TV/WB/FM SENS
DX
LOCAL
B.P.F.
AM BAND
SWITCHING
AM BAND
SWITCHING
SWITCHING
MONO/ST
Q201,202,T201
DC/DC CONVERTER
GND
NC
NC
Q3
L3
AM FERRITE-ROD
ANTENNA
SWITCH
DX LOCAL
TV/FM/WB
RF AMP
LCH
COM
SW
B+B
N+B
R+B
NGND
100µH
220µH
0.1µH
22µH
4-7. SCHEMATIC DIAGRAM – BATTERY/MAIN Boards – • See page 11 forWaveforms. •See page 19 for IC Block Diagrams.
(Page 18)

SRF-HM01V
1616
4-8. PRINTED WIRING BOARD – MICROCOMPUTER Board (Component Side) –
R329
R328
R327
R326 R325
R324 R322
R321
R323
C317
R319
C318 C315
R320
R317
R333
C320
C319
R314
R312
C325
C307
C308
C311
C312
C313
C314
IC301
D302
AK
MICROCOMPUTER BOARD (COMPONENT SIDE)
(11)
11
1-683-612-
S302
S306
TUNE
S303
BAND
S305
MODE
S301
ENTER
S304
MEGA BASS/
CLOCK
−+
BATT2
PAS SECONDARY
BATTERY
(SL-621-FL11N)
X301
64
49
17
32
33 48
16 1
15 1
LCD1
LIQUID CRYSTAL DISPLAY
A
B
C
D
E
F
2 3 4 5 6 7 81
• Semiconductor
Location
Ref. No. Location
D302 E-4
IC301 D-6

SRF-HM01V
1717
4-9. PRINTED WIRING BOARD – MICROCOMPUTER Board (Conductor Side) –
C309
R313
R310
R301
R332
C324
R304
R303
R302
R306
R305
L302
L301
C310
R311
C303
C323
R336
C304
R307
C316
C301
C302
R318
R331
C321
R316
C322
R330
R338
CN301
R309
R308
C306
R337
C305
R335
IC303
IC302
Q303
B
C
E
Q302
BCE
Q301
BCE
D301
KA
MICROCOMPUTER BOARD (CONDUCTOR SIDE)
(11)
11
1-683-612-
+
2
1
3
43
12
10 1
11 20
A
B
C
D
E
F
2 3 4 5 6 7 81
A
MAIN BOARD
CN1
• Semiconductor
Location
Ref. No. Location
D301 E-4
IC302 D-5
IC303 F-2
Q301 D-4
Q302 D-4
Q303 E-4
(Page 12)

SRF-HM01V
1818
4-10. SCHEMATIC DIAGRAMS – MICROCOMPUTER Board – • See page 11k for Waveform.
(Page 15)
R304
R305 R306
R307
R301
R302
R303
C301
C302
C303
Q301
Q302
C304
R308
IC303
R332
R336
R312
R313
R314C307
C308
C309
C310
C311
C312
C313
C314
C318
C319
C321 C323 C324
R318
R321
R322
R323
R324
R325
R326
R327
R328
R330
D301
R310
R311
R331
IC302
C325
R337
C306
R329
C320
R317C317
C305R309
C316
L302
R316
D302 R333
R338
R320
R319
L301
C315
BATT2
X301
S302S301
S303 S304
S306S305
IC301
R335
Q303
CN301
C322
4.7k
1M 10k
220k
100k
15k
10k
0.01
1
1000p
2SD2216
2SD2216
1
10k
XC61AN0802MR
0
0
1k
1k
100k47p
12p
0.1
10 4V
0.1
0.1
0.1
0.1
0.1
1000p
0.01 1 1
470k
1k
1k
1k
1k
1k
1k
1k
4.7k
470k
RB521S
1k
1k
100k
XC61CN1002N
0.01
1k
1
4.7k
1000p
1k1
0.11M
1000p
1k
MA2S111 10k
10
100k
0
0.47
75KHz
TC9329FA-112
470k
2SB1218
20P
0.1
A1
A2
A3
B1
B2
B3
B4
B1
B2
B3
B4
A4
A1
A2
A3
A4
G
O
I
OUT
IN
GND
MODE BAND
ENTER
P5-3
XOUT
XIN
GND
VDB
C1
C2
VEE
C3
C4
VCLD
RESET
MUTE
VDD
P1-3
P9-1
P9-0
P8-3
P5-2
P5-1
P3-3
P3-2
V REG
D0
VDD
OSC IN
GND
IF IN2
INT1
TEST
COM1
COM2
COM3
COM4
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
P8-1
COM1
COM2
COM3
COM4
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
BATT
POWER SW
BEEP
POWER
OSC
F.GND
MUTE
MEGABASS
AM BAND
MONO/ST
FM BAND
BAND2
BAND1
D/D
VT
LCD1
LIQUID CRYSTAL DISPLAY
PAS SECONDARY
BATTERY
(SL-621-FL11N)
RESET SIGNAL
GENERATOR
Q301,302
LOW-PASS
FILTER
GND
BATTERY
VOLTAGE
DETECT
MONO/ST
POWER ON1
BAND1
BAND2
REF SW
FM BAND
POWER ON2
POWER SW
MUTE
AM BAND
MEGA BASS
BEEP
KR3
KR2
KR1
KS2
KS1
TR TEST
TUNE −
TUNE + MEGA BASS/CLOCK
SYSTEM CONTROLLER
GND
GND
GND
NC
NC
B+ SWITCH
22µH
22µH

19
SRF-HM01V
IC201 TA2123AF (EL)
• IC Block Diagrams
– MAIN Board –
IC1 TA2154FN- (EL)
1 2 3 4
27 26 25
5
FM/TV
MIX
30 29 28
AM
MIX
24
AM
OSC 1/2
FM
OSC
TV
OSC
6 7 8 9 10
AGC
23 22 21 20
1/8 OR
1/16
FM/AM/TV
PW SW
11 12
FM
DET
LEVEL
DET
AM
DET
19
SW
13 14 15
FM MPX
18 17 16
TV
RF
FM
RF
BUFFER
BUFFER
BUFFER
IF
BUFFER
FM
IF
AM
IF
AF
TV RF IN
F
M RF IN
RF GND
FM MIX
AM MIX
AGC
VCC
FM IF IN
GND
AM IF IN
QUAD
DET OUT
MPX IN
LPF1
R OUT
AM RF IN RFVCC AM OSC TV RF OUT FM RF OUT AM BYPASS TV FM OSC OSC OUT MODE2 MODE1 IF REQ IF COUNT LPF2B LPF2A L OUT
PRE A PRE B
MIX
PW B
PW A
PW C
BST
MT TC
BASE
RF IN
PW GND
OUT B
OUT C
OUT A
VCC
RF OUT
VREF OUT
BST NF
BST OUT
PW IN C
LPF
EQ A
PW NF A PW IN A
PW IN B
PW NF B
3
IN A-R
5
PRE NF-A
6
PRE OUT A
7
MTL DRV A
8
MTL DRV B
9
PRE OUT B
10
PRE NF-B
11
AMS IN
12
IN B-R
4
IN B-F
2
IN A-F
1
21
20
19
18
17
GND
16
AMS DET
15
AMS MIX
14
AMS SW
13
22
23
24
38
C-AMP SW 37
PW SW 42
MT SW 41
F/R SW 44
BST SW 43
M/N SW 46
PRE GND 47
VREF IN 48
PRE SW 45
AMS OUT 40
BEEP 39
262728293031323334
DET
36
AGC IN
35
+
–
+ –
+ –
+ –
+
–
+
–
EQ B
25
RIPPLE
FILTER
AGC
DET
BEEP
VREF
SWITCH COMPARATOR
MTL DRV

20
SRF-HM01V
4-11. IC PIN FUNCTION DESCRIPTION
•MICROCOMPUTER BOARD IC301 TC9329FA-112 (SYSTEM CONTROLLER)
Pin No. Pin Name I/O Description
1 to 4 COM1 to COM4 O Common drive signal output to the liquid crystal display
5 to 15 S1 to S11 O Segment drive signal output to the liquid crystal display
16 P8-1 I Not used
17 TR TEST I Setting terminal for TR mode (fixed at “L” in this set)
18 P8-3 I Not used
19, 20 P9-0, P9-1 I Not used
21, 22 KS1, KS2 O Key scan signal output to the key matrix
23 to 25 KR1 to KR3 I Key return signal input from the key matrix
26 P1-3 I Not used
27 VDD —Power supply terminal (+1.5V)
28 BEEP O Beep sound signal output “H”: beep sound on
29 MEGA BASS O Mega bass control signal output “H”: mega bass on
30 AM BAND O AM band selection signal output “H”: AM
31 MUTE O Muting control signal output “L”: muting on
32 MUTE O Muting control signal output Not used
33 TEST I Setting terminal for test mode Not used
34 POWER SW I POWER switch input “H”: power on
35 INT1 I Battery voltage (1.0V) detection signal input “L”: low battery
36 IF IN2 I Not used
37 GND —Ground terminal
38 OSC IN I FM/AM/TV/WEATHER OSC signal input from the tuner circuit
39 VDD —Power supply terminal (+1.5V)
40 D0 O PLL phase comparator output
41 V REG —Power supply terminal (connected to the coupling capacitor)
42 POWER ON2 O Power on/off signal output “L”: power on
43 FM BAND O FM band selection signal output “L”: FM/TV (2ch to 6ch) (fixed at “L”in this set)
44, 45 P3-2, P3-3 I Not used
46 REF SW I TV reference frequency selection signal output “L”: 3.125kHz, “H”: 6.25kHz
(fixed at “L”in this set)
47 to 49 P5-1 to P5-3 I Not used
50 MONO/ST O Mono/stereo selection signal output “L”: mono
51 POWER ON1 O Power on/off control signal output to the audio master amp “H”: power on
52 BAND1 O Band 1 selection signal output “L”: AM, “H”: FM/TV/WEATHER
53 BAND2 O Band 2 selection signal output
“L”: FM/TV (2ch to 6ch), “H”: AM/TV (7ch to 13ch)/WEATHER
54 RESET I System reset signal input “L”: reset
For several hundreds msec. after the power supply rises, “L”is input, then it changes to “H”
55 XOUT O Main system clock output terminal (75 kHz)
56 XIN I Main system clock input terminal (75 kHz)
57 GND —Ground terminal
58 VDB —Connection terminal of doubler circuit capacitor for liquid crystal display drive power supply
59, 60 C1, C2 —Connection terminal of doubler circuit capacitor for liquid crystal display drive power supply
61 VEE —Connection terminal of doubler circuit capacitor for liquid crystal display drive power supply
62, 63 C3, C4 —Connection terminal of doubler circuit capacitor for liquid crystal display drive power supply
64 VCLD —Connection terminal of doubler circuit capacitor for liquid crystal display drive power supply