Sony SHR-M1 User manual

SHR-M1
E Model
Tourist Model
SERVICE MANUAL
PLL SYNTHESIZER
FM STEREO HEADPHONE RADIO
MICROFILM
SPECIFICATIONS
Radio segment
Frequency range: FM 76 – 108 MHz
Channel Step: 0.1 MHz
Power output: 3.5 mW + 3.5 mW
Headphone segment
Headphone type: Open-air Dynamic
Driver unit: ø 30 mm Dome type
Input: ø 3.5 mm stereo mini-jack
Maximum input: 100 mW
Impedance: 24 Ω(at 1 kHz)
Frequency characteristic: 14 to 24,000 Hz
Others
Power requirements 1.5 V DC, one R03 (size AAA) battery
Mass Approx. 99.5 g (3.5 oz) incl. a battery, not
incl. cord
Accessories supplied Sony R03 (sizeAAA) battery (1)
Connecting cord (1)
Design and specifications are subject to change without notice
Ver 1.0 1999.10

— 2 —
TABLE OF CONTENTS
1. GENERAL ·········································································· 3
2. DISASSEMBLY
2-1. Driver (030F023A)(L) ························································· 4
2-2. Jack Board············································································· 4
2-3. Driver (030F023A)(R) ························································· 5
2-4. Main Board ··········································································· 5
2-5. Key Board ············································································· 6
2-6. Belt ························································································ 6
3. ELECTRICAL ADJUSTMENT ···································· 7
4. DIAGRAMS
4-1. Block Diagram ······································································ 9
4-2. Printed Wiring Board — Main Board — ······················· 11
4-3. Schematic Diagram ·························································· 13
4-4. Printed Wiring Board — Key Board — ························· 15
4-5. Ic Pin Function Description ················································ 17
5. EXPLODED VIEWS ······················································ 18
6. ELECTRICAL PARTS LIST ······································· 19
SERVICE NOTE
In order to repair themachine while the main power is on, connecting
tool the MAIN board with the KEY board with a dedicated tool (J-
2503-012-A), is convenient.
KEY boar
d
CN201
CN1
MAIN board
Tool (J-2503-012-A)

— 3 —
SECTION 1
GENERAL This section is extracted
from instruction manual.

— 4 —
SECTION 2
DISASSEMBLY
Note : Disassemble the unit in the order as shown below.
Note : Follow the disassembly procedure in the numerical order given.
Set Driver (030F023A) (L)
Driver (030F023A) (R)
JACK Board
MAIN Board KEY Board
Belt
2-1. DRIVER (030F023A)(L)
2-2. JACK BOARD
Lead wire (white)
Lead wire (red)
Rear side (Remove the two solderings.)
3 Release the
three claws.
Driver
(030F023A)
2 Cushion
1 Pad, ear
4
5 Driver
(030F023A)
Cabinet assy
Green + Natural
Natural
Green + Natural
Green
Red
Green + Natural
Natural
4 Release the three claws.
Green + Red
Green
Red
Precaution for installation
Precaution for installation
7 Wire (10 arbor), lead
9 Lead wire (A)
qd Cabinet (upper)(L)
Belt
0 Release the claw.
S302
J302
Knob
Slide the S301 and S302 in the direction of the arrows.
Knob S301
qs Screw (+P2 × 6)
qa Remove the JACK board
in the direction of the arrow.
JACK board
5 Cabinet (main)(L)
6 Remove the ten solderings.
8 Remove the soldering.
3 Cabinet (lower)(L)
2 Release the
two claws.
1 Two screws (+P2 × 8)
Solder the lead wires (10 arbor) directly to the
position as shown while being cautious of colors.
Solder the lead wire (A) to ANT terminal directly.
ANT

— 5 —
2-3. DRIVER (030F023A)(R)
2-4. MAIN BOARD
Lead wire (red)
Lead wire (white)
Rrear side (Remove the two solderings.)
3 Release the
three claws.
Driver (030F023A)
2 Cushion
1 Pad, ear
4
5
Driver
(030F023A)
Cabinet assy
Green + Natural
Solder the lead wires (10 arbor) directly to the
position as shown while being cautious of colors.
Solder the lead wire (A) to ANT terminal directly.
Natural
Green + Red
Green
Red
Green + Natural
Natural
Green + Red
Green
Red
8 Wire (10 arbor), lead
6 Remove the connector.
(CN1)
q; Lead wire (A)
qa MAIN board
JACK board
5 Cabinet (main)(R)
7 Remove the ten solderings
from the rear side.
9 Remove the soldering
from the rear side.
3 Cabinet (lower)(R)
2 Release the
three claws.
4 Release the three claws.
1 Two screws (+P2 × 8)
Rear side
Precaution for installation
ANT

— 6 —
2-5. KEY BOARD
2-6. BELT
4 KEY board
2 Holder (button)
5 Cabinet upper (R) ass
y
Belt
3 Release the three claws.
1 Screw (+P2 × 8)
Tip
Tip
5 Wire (10 arbor), lea
d
6 Lead wire (A)
7 Belt
1 Cap (L)
2 Hook (L)
4 Hook (R)
3 Cap (R)
Mark at the 9.5 cm position
from the tip of the lead wire
and align the marking with
the center position as shown
in the illustration.
Attach the Cap (L) and leads
with adhesive agent.
Center
9.5cm
Marking
Left side Wire (10 arbor), lead
Lead wire (A)
Lead wire
(ten conductors)
Precaution for installation
Lead wire (A)
Lead wire (A)
Mark at the 5.5 cm position from the tip of the lead
wire and align the marking with the center position
as shown in the illustration.
Attach the Cap (R) and leads with adhesive agent.
Center
5.5cm
Marking
Right side Wire (10 arbor), lead
Precaution for installation
Precaution for installation
Precaution for installation

— 7 —
• Repeat the procedures in each adjustment several times.
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1 76.0MHz
CT1 108.0MHz
FMVCO Adjustment
Procedure :
1. Connect frequency counter to the positions shown below.
2. Tune the set to 98 MHz.
3. Adjust RV1 so that the value of the frequency counter reading
becomes 19 kHz.
Specification Value :
Frequency counter
18,500 – 19,500 Hz
0dB=1µV
Adjustment Location: MAIN board
FM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1 10.7MHz
SECTION 3
ELECTRICAL ADJUSTMENT
0.01 µ F
FM RF signal
generator
to ANT (TP6)
75kHz (100%) amplitude modulation
by 1kHz signal.
Output level : as low as possible
16 Ω
Set +
–
Level mete
r
Speaker terminal (SP+/SP–)
0.01 µ F
FM RF signal
generator
to ANT (TP6
)
Carrier frequency : 98MHz
Modulation : no modulation
Output level : 0.1V (100dB)
Frequency counte
r
1 µ F+
–
100k Ω
IC2 Pin qs
IC2 Pin 9
— Side A — — Side B —
RV1
FM VCO adjustment
T1
FM IF freg. adjustment
CT1
FM tracking
adjustment
L1
FM tracking
adjustment
12 1
IC2
13 24
TP6 (ANT)
SP (+)
SP (–)

— 8 —
SECTION 4
DIAGRAMS
• IC BLOCK DIAGRAMS
IC1 TA7371AF-EL
IC2 TA2022AFN-EL
IC102 LA4537M
GND
AFC DIODE(A)
RF IN
OFC DIODE(C) MIX OUT
VCC OSC RF OUT
1 2 3 4
5678
RF
REG
MIX
OSC
VREF
OSC
VCC
GND
IF OUT IF REQ
SP OUT
1 2
FM IF IN
MIX
3 4 5
AM IF IN
QUAD
AGC
6 7 8 9
10 11 12
ROUT LOUT ST IND
13 14 15
MPX IN PILOT IN DET OUT IN SW AM RF IN
20 21 22 23 24
LPF 2A LPF 2B
18 19
LPF1 VCO
16 17
STOP
PULSE
OSC AGCMIX
FM
IF
FM
IF
AM
IF
AM
IF
FM DET
SWITCH
AM DET
DEVIDE
DECODE
PRE
VCO090
FM
AM
PILOT ST
IND
øø
POWER
SWITCH MUTE
BIAS
AMP
AMP
1
2
3
4
5 6
7
8
9
10 MUTE
R-OUT
GND
L-OUT
VCC
PWR
R-IN
GND
L-IN
REG
Note on Printed Wiring Board:
•X: parts extracted from the conductor side.
•a:Through hole.
•b: Pattern from the side which enables seeing.
Caution:
Pattern face side: Partsonthepattern facesideseen from
(SIDE A) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(SIDE B) the parts face are indicated.
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.
•U: B+ Line.
•H: adjustment for repair.
• Powervoltageisdc1.5 Vandfedwith regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
• Voltagesaretakenwith aVOM (Input impedance 10 MΩ).
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.
• Signal path.
F: FM
J: AUDIO IN
• Abbreviation
JE :Tourist model.

SHR-M1
4-1. BLOCK DIAGRAM
— 9 — — 10 —
L1
L2
TU+1.5V
TU+1.5V
CT1
D1
FM TRACKING
1 6
12
21
24
25
9
11
23
19
52
RF IN MIX OUT
8FM RF
5OSC
RF MIX
OSC
D2
FM VCO
AMP
Q1
3
1
22
20
4
CF1
FM IF IN
VREF
BATTERY
DETECT
Q203
LED
DRIVE
Q204
+2.5V SW
Q303,304
DET OUT
FM IF FM DET
MUTE
BIAS
AGC
STOP
PULSE
7
21
FM IF
AMP
Q2
PLL LPF
Q201,202
TU+1.5V
T1
FM IF
S201
S202
S203
SYSTEM CONTROL
LCD DRIVE
IC201
VCOH
XOUT
TEST
16
LED
XIN
KSI
UP
EO
BEEP
3
MUTE
31
|
34
COM0-3
35
|
43
LCD0-8
13
|
10
9
|
1
VDD
17
BATT DET
4
TUNE ON
50
15
CE
FM FRONT END
IC1
FM STEREO DECODER
IC2
VOLTAGE
DETECT
IC202
TU+1.5V
SW
Q101,102
DC/DC
CONVERTER
L304, Q301,302
DC/DC
CONVERTER
IC301
LCD
LCD201
BT201
LITHIUM BATTERY
PAS621L
DRY BATTERY
SIZE "AA"
(IEC DESIGNATION R03)
1PCS, 1.5V
SP1
S301
J301
16
X201
75kHz
TU+1.5V
• Signal path
: FM
: AUDIO IN
TP6
ANT
RV1
RV101
POWER AMP
IC102
TP3
VCO
TP2
VT
TP202
VT
TP201
VCO
TP212
TEST
TP213
KS
TP214
UP
TP215
DOWN
TP216
PRESET
TP7
IF IN
TP305
L-CH
TP304
R-CH
TP11
MUTE TP10
BEEP
TP211
MUTE
TP207
2.5V
TP205
T-ON
TP101
1.5V
TP206
13V
TP210
1.5V
TP12
1.5V
TP209
BEEP
53
POWER TP208
POWER
TP1
MPX
TUNE+
TUNE-
PRESET
L1, CT1
TP8
DET OUT
FM VCO
RADIO ON
OFF i
AUDIO IN
L
R
SP2
4
2
7
9
5
10
AMP
AMP
FM IF
X1
TU+1.5V
DEVIDE
DECODE
PRE
VCO090
MPX IN
PILOT IN
14
L OUT
15
R OUT
øø
VOL
TP301
TP302
TP303
S302
12 ENTER
13 PRESET
D201
D202-204
(LCD BACK LIGHT)
TP4
VT
MAIN BOARD (2/2)
MAIN BOARD (1/2)
JACK BOARD
JACK BOARD
KEY BOARD

SHR-M1
4-2. PRINTEDWIRING BOARD — MAIN SECTION —
— 11 — — 12 —
JACK BOARD (SIDE B)
MAIN BOARD (SIDE B)
MAIN BOARD (SIDE A)
JACK BOARD (SIDE A)
A
TO KEY BOARD
CN201
AUDIO
IN
RV101
VOL
S302
RADIO ON/OFF
J301
AUDIO IN
RADIO
S301
OFF
ON
S1
SENS
DX
LOCAL
SP1
SPEAKER
LCH
SP2
SPEAKER
RCH
EC
1
34
5
EC
B
B
C
C
B
B
E
C
C
B
C
C
E
E
B
B
B
E
E
E
GND
RCH
LCH
SP+
1.5V
SP+
SP–
POWER 2V
13V
T-ON
GND RCH
LCH
SP+
SP–
SP+
POWER
2V
13V
15V
T-ON
1
1
1
56
10
151012
13 15 20 24
4
85
19 20
2
ANT
RV101-2
RV101-1
1-675-125- 11
(11)
1-675-124- 11
(11)
1-675-124- 11
(11)
1-675-125- 11
(11)
E MODEL
JE MODEL
E MODEL
R22
16
12
A
B
C
D
E
3456
Ref. No. Location
D1 B-2
D2 B-3
D301 D-2
D302 D-2
D303 E-5
D304 E-4
IC1 B-2
IC2 A-2
IC102 B-1
IC301 D-4
Q1 B-3
Q2 A-2
Q101 B-5
Q102 B-5
Q301 D-3
Q302 D-3
Q303 D-5
Q304 D-5
• Semiconductor
Location
• Refer to page 8 for Note on PrintedWiring Board.