DOWNLOAD Sony SRF-M85 Service Manual ↓ Size: 695.35 KB | Pages: 16 in PDF or view online for FREE

Model
SRF-M85
Pages
16
Size
695.35 KB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
srf-m85.pdf
Date

Sony SRF-M85 Service Manual ▷ View online

3
SRF-M85
SECTION  1
GENERAL
This section is extracted from
instruction manual.
RADIO ON
MB
STPW PITCH
SPLIT TIMER
FM
AM
PM
HOLD lever
BAND
SPLIT/RESET
START/STOP
POWER
ENTER
FM SENS
DX/LOCAL
Belt clip
DISPLAY
TUNE/TIME SET +/
−*
1
VOL*
2
MODE
MEGA BASS
i (headphones/
earphones) jack
*
2
 There is a tactile dot beside VOL to show the direction to turn up
the volume.
*
1
The TUNE/TIME SET + has a tactile dot.
Features
¥ FM/AM 2 band PLL (phase locked loop) synthesized armband radio.
¥ A total of 20 stations can be preset, 15 FM stations and 5 AM stations.
¥ Stopwatch, split and pitch timer functions.
¥ Wearable round design for armband and belt-holder use.
¥ Splash-resistant for all —weather use.
¥ MEGA BASS for dynamic bass sound.
Setting the Clock
The display will flash  AM 12:00  when the battery is first inserted.
1
Press DISPLAY repeatedly to select the clock mode when the
clock mode is not on.
2
Hold down ENTER for more than 2 seconds.
The beep sounds and the hour flashes in the display.
3
Press TUNE/TIME SET + or – until the correct hour appears in
the display.
Each press changes the digit(s) by one.
When you keep the button pressed, the digit(s) change rapidly.
4
Press ENTER.
The beep sounds and the minute starts to flash.
Repeat step 3 to set the minute. After setting the minute,
press ENTER again. The two beeps sound and the clock
starts from 0 seconds.
Notes
¥ One you start setting the clock, you must perform each step within 65 seconds,
or the clock setting mode will be canceled.
¥ 12-hour system:  AM 12:00  = midnight,  PM 12:00  = noon.
SRF-M85
4
Note:
 Follow the disassembly procedure in the numerical order given.
2-2. CABINET (FRONT)  ASSY
This set can be disassembled in the order shown below.
2-1. DISASSEMBLY  FLOW
SECTION  2
DISASSEMBLY
5
three screws
(1.7 
×
 8)
4
clip assy
3
two screws
(1.7 
×
 6)
2
two screws
(1.7 
×
 6)
2
1
3
5
4
1
S311
lever
Note: When installing the cabinet (front) assy, 
install five screws in order of figure.
Note: When installing the cabinet (front) assy, adjust S311 and lever.
1
2
3
: 0.09 
±
 0.01 N
m
4
5
: 0.08 
±
 0.01 N
m
6
cabinet (front) assy
SET
2-2. Cabinet (Front) Assy
(Page 4)
2-3. Board Assy
(Page 5)
2-4. Spreading of Adhesive Agent
(Page 5)
SRF-M85
5
2-3. BOARD  ASSY
2
Remove two solders.
black
KEY board
1
stopper cushion
red
4
3
claw
7
board assy
MAIN board
6
screw (1.7 
×
 6)
S101
5
knob (VOL) assy
lever
KEY board
Note: When installing the board assy, adjust S101 and lever.
2-4. SPREADING  OF  ADHESIVE  AGENT
slit
cabinet (rear) assy
adhesive agent
(OK)
(NG)
Note:  When installing the cabinet (front) assy, 
spread the adhesive agent (TSE3975C 100G) 
(Part No.: 7-600-006-17) in the slit.
6
SRF-M85
SECTION  3
ELECTRICAL  ADJUSTMENTS
TUNER  SECTION
0 dB=1 mV
[AM]
Setting:
BAND button: AM
[FM]
Setting:
BAND button: FM
Repeat the procedures in each adjustment several times, and
the  tracking adjustments should be finally done by the trimmer
capacitors.
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 
i
 jack (J201)
FM RF signal
generator
75 kHz frequency
deviation by 1 kHz
signal
Output level: 
as low as possible
+
level meter
0.01 
µ
F
MAIN board
TP (RF GND)
MAIN board
TP (ANT IN)
set
16 
i
 jack (J201)
digital voltmeter
TP (VT)
TP (RF GND)
MAIN board
AM VCO VOLTAGE ADJUSTMENT
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
L104
531 kHz
1.3 
±
 0.05 V
Confirmation
1,710 kHz
7.7 
±
 0.3 V
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L103
585 kHz
CT101
1,485 kHz
FM FREQUENCY COVERAGE CONFIRMATION
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
Confirmation
108 MHz
8.7 
±
 0.5 V
Confirmation
87.5 MHz
5.8 
±
 0.5 V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L102
87.5 MHz
Adjustment and Connecting Location: MAIN board
(See page 7)
Page of 16
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Sony SRF-M85 Service Manual ▷ Download

  • DOWNLOAD Sony SRF-M85 Service Manual ↓ Size: 695.35 KB | Pages: 16 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sony SRF-M85 in PDF for free, which will help you to disassemble, recover, fix and repair Sony SRF-M85 Audio. Information contained in Sony SRF-M85 Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.