Read Sony SRF-M75PM Service Manual online
MICROFILM
SERVICE MANUAL
FM STEREO/AM PLL SYNTHESIZED RADIO
US Model
Canadian Model
AEP Model
E Model
Australian Model
SPECIFICATIONS
SRF-M75PM
US, Canadian, and
E models
E models
AEP,
Australian models
Australian models
Ver 1.0 1999. 04
– 2 –
TABLE OF CONTENTS
1.
SERVICING NOTES
...............................................
2
2.
GENERAL
...................................................................
3
3.
DISASSEMBLY
.........................................................
4
4.
ELECTRICAL ADJUSTMENTS
TUNER Section ..............................................................
6
PULSE MONITOR Section ............................................
8
5.
DIAGRAMS
5-1. Block Diagram ................................................................
9
5-2. Printed Wiring Boards ..................................................... 12
5-3. Schematic Diagram ......................................................... 15
5-4. IC Pin Function Description ........................................... 20
5-3. Schematic Diagram ......................................................... 15
5-4. IC Pin Function Description ........................................... 20
6.
EXPLODED VIEW
................................................... 21
7.
ELECTRICAL PARTS LIST
............................... 22
Forced Reset
The system microprocessor can be reset in the following proce-
dure.
Use these procedure when the unit cannot be worked normally
due to the overrunning of the microprocessor, etc.
dure.
Use these procedure when the unit cannot be worked normally
due to the overrunning of the microprocessor, etc.
Procedure:
1. Set to radio OFF.
2. While pressing the
1. Set to radio OFF.
2. While pressing the
[SCAN]
button, press two buttons of
[START/STOP]
and
[BAND]
simultaneously for 5 seconds.
3. The unit is reset, and display blinking “
AM
12:00
”.
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.
SECTION 1
SERVICING NOTES
– 3 –
SECTION 2
GENERAL
This section is extracted from
instruction manual.
instruction manual.
US, Canadian, and
E models
AEP, Australian
models
– 4 –
CABINET (FRONT)/(REAR) ASSY
KEY BOARD
·
This set can be disassembled in the order shown below.
SECTION 3
DISASSEMBLY
Set
Key Board
Main Board
Knob (A)
Cabinet (Rear) Assy
Cabinet (Front) Assy
2
three screws
(B1.7
(B1.7
×
8)
2
two screws
(B1.7
(B1.7
×
8)
1
Remove the battery case lid
of the arrow.
of the arrow.
3
cabinet (front) assy
4
cabinet (rear) assy
1
three claws
2
Open the key board
to direction of the arrow.
to direction of the arrow.
1
four claws
Note:
Follow the disassembly procedure in the numerical order given.