DOWNLOAD Sony CFM-20 (serv.man2) Service Manual ↓ Size: 1.7 MB | Pages: 22 in PDF or view online for FREE

Model
CFM-20 (serv.man2)
Pages
22
Size
1.7 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
cfm-20-sm2.pdf
Date
PREV: Sony CFM-20 Service Manual

Sony CFM-20 (serv.man2) Service Manual ▷ View online

4
CFM-20
2-3. RECORD/PLAYBACK HEAD (HRP101), REEL/CAPSTAN MOTOR (M101), BELT
2-4. JACK BOARD (AEP, UK, IT, CET, HK, SP, AR model), MAIN BOARD
1
Screws Tapping+B
(+PTT 2X5(s))
MD ASSY
4
Record/playback
    head (HRP101)
8
Reel/capstan
   motor (M101)
MD ASSY
M101
Belt
Flywheel ASSY
• Attaching belt
6
Spring, Compr
3
Screws
 + PTT 2X 5
7
Screws + P2.6X 5
9
Belt
5
Lug (T), plate
2
Guide, tape
7
8
6
1
2
0
4
Screw
(+ BVTP 3X10)
3
Screw
(+ BVTP 3X10)
Jack board
9
 CNP901
Main board
MCabinet (rear)
knob (VOL)
knob (FUN)
Chasis
5
Screw
(+ BVTP 3X10)
5
CFM-20
2-5. BATT (+) BOARD, POWER BOARD
       (AEP, UK, IT, CET, HK, SP, AR model)
2-6. BATT (+) BOARD, POWER BOARD
       (C&SA, MX, TW model)
Note on attaching power cord
On attaching power cord, first, 
turn it around the projection on 
"Cabi, rear" as shown in the 
figure and secure it with "PWB, 
cord retainer".
2
4
6
8
3
Screw 
(+ BVTP 3X10)
1
Claw
Power board
Cord, power
Batt (+) board 
PWB, Cord retainer
White
Red
5
7
Screws 
(+ BVTP 3X10)
Remove solder 
(two places)
Cabinet (rear)
1
2
4
Claw
3
Screws
 (+ BVTP 3X10)
Power board
Batt (+) board
Red
White
Cabinet (rear)
6
CFM-20
•
 DIAL POINTER SETTING
1
2
5
7
Cabinet (front)
Pointer
Cabinet (front)
ECM101
Set the leads from microphone(ECM101)
as shown in the figure.
Set Pointer to "Cabinet
(front)" as shown in the
figure.
4
 Set the right side edge
of Pointer to the center
of three scratched lines
on Back plate.
3
Screws
6
Turn knob (tuner) fully in the 
direction of the arrow as shown
in the figure.
Cabinet (rear) ASSY
Cabinet (front)
(+BVTP 3X10)
Pointer
Back plate
Note : Follow the installation procedure in the numerical order given.
7
CFM-20
  TAPE RECORDER SECTION
FUNOTION switch (S101)
: TAPE (RADIO OFF)
VOLUME (RV101)
: MIN
Standard Output Level
Output terminal
Earphone
Speaker
load impedance
8
Ω
12
Ω
output signal level
0.25V (–10dB)
0.775V (0dB)
Test Tape
Type
Signal
Used for
WS-48A
3kHz, 0dB
Tape Speed Adjustment
P-4-A063
6.3kHz
Record/Playback Head
Azimuth Adjustment
Record/Playback Head Azimuth Adjustment
Procedure :
1.Playback Mode
2.Rotate the screw to adjust level meter reading to the maximum.
Note :
Adjust to the maximum peak though there may be two or
three peakes
3.After the adjustment, lock the adjustment screws with suitable
locking compound.
• Abbreviation
SP
: Singapore
AR
:Argentina
HK
: Hong Kong
MX
:Mexican
IT
: Italian
TW
:Taiwan
C&SA : Central and South America
CET
: East European & Russian
Adjustment Location :
SECTION 3
ADJUSTMENTS
3-1. MECHANICAL ADJUSTMENTS
PRECAUTION
1.Clean the following parts with a denatured-alcohol-moistened
swab :
record/playback head
pinch roller
erase head
rubber belts
capstan
2.Demagnetize the record/playback head with a head demagnetizer.
(Do not bring the head demagnetizer close to the erase head.)
3.Do not use a magnetized screwdriver for the adjustments.
4.After the adjustments, apply suitable locking compound to the
parts adjusted.
5. The adjustments should be performed with the rated power sup
ply voltage unless otherwise noted.
Torque Measurement
Forward
CQ-102AS
Forward
CQ-102AS
Back Tension
Fast Forward
CQ-201WS
Rewind
CQ-201WS
Tape Tension  Measurement
Torque Meter
Meter Reading
Torque
Torque Meter
Meter Reading
 1.77 to 5.88 mN•m
(18 to 60 g•cm)
(0.25 to 0.83 oz•inch)
0.01 to 0.49 mN•m
(1 to 5 g•cm)
(0.014 to 0.069 oz•inch)
4.42 to 9.31 mN•m
(45 to 95 g•cm)
(0.63 to 1.31 oz•inch)
4.42 to 9.31 mN•m
(45 to 95 g•cm)
(0.63 to 1.31 oz•inch)
3-2. ELECTRICAL ADJUSTMENTS
CQ-405AS
    more than 60g
(more than 2.12 oz)
 0dB=0.775V
Head azimuth adjustment screw
set
test tape
P-4-A063J
(6.3kHz, -10dB)
Speaker output:12
Ω
 Earphone jack:8
Ω
level meter
J101 (Earphone jack)
AEP, UK, CET, IT, AR, HK, SP model
t
C&SA, MX, TW model 
t
KH102 (Speaker output)
+
Page of 22
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Sony CFM-20 (serv.man2) Service Manual ▷ Download

  • DOWNLOAD Sony CFM-20 (serv.man2) Service Manual ↓ Size: 1.7 MB | Pages: 22 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sony CFM-20 (serv.man2) in PDF for free, which will help you to disassemble, recover, fix and repair Sony CFM-20 (serv.man2) Audio. Information contained in Sony CFM-20 (serv.man2) 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.

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