Sony HS-RM536 / HS-RM539 Service Manual ▷ View online
5
HS-RM536/RM539
2-3. MECHANISM DECK
2-4. BELT, CAPSTAN/REEL MOTOR (M601), MAGNETIC HEAD (PLAYBACK)(HP601)
wheel ASSY (P), capstan
wheel ASSY (P), capstan
Belt
• How to apply the belt
Capstan/reel motor
(M601)
(M601)
1
Belt
5
magnetic head
(PLAYBACK)
(HP601)
(HP601)
3
Capstan/reel motor
(M601)
2
Two screws (M1.4)
4
Two screws (M1.4)
Mechanism deck
2
1
Claws
Cabinet (front) ASSY
Mechanism deck
6
HS-RM536/RM539
Spring (torsion)
Cassette holder
Slot
Cabinet (front) ASSY
1
4
3
Hinge
2
Hinge
1
Insert the spring (torsion) to the slot as shown in the figure.
2,3 Insert the hinge of the cassette holder .
4
4
Close the cassette holder then press it.
z
CAUTIONS DURING ASSEMBLY
7
HS-RM536/RM539
3-1. MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab :
playback head
pinch roller
capstan
rubber belt
2. Demagnetize the playback head with a head demagnetizer.
Do not use a magnetized screwdriver for the adjustments.
3. These measurement and adjustment should be performed with
the rated power supply voltage (2.5 V) unless otherwise noted.
Torque Measurement
Mode
Torque meter
Meter reading
FWD
1.97 to 4.90 mN•m
20 to 50 g • cm
CQ-102C
(0.28 to 0.69 oz• inch)
FWD
less than 0.19 mN•m
less than 2 g • cm
back tension
(less than 0.027 oz• inch)
FF, REW
CQ-201B
5.89 to 19.61 mN•m
60 to 200 g • cm
(0.84 to 2.77 oz• inch)
SECTION 3
ADJUSTMENTS
3-2. ELECTRICAL ADJUSTMENTS
PRECAUTION
• Supplied voltage : 2.5V
• Switch and control position
• Switch and control position
SUPER BASS (S809) : OFF
VOLUME control (RV301) : maximum
VOLUME control (RV301) : maximum
TAPE SECTION
Test Tape
Type
Signal
Used for
WS-48A
3kHz, 0dB
Tape Speed Adjustment
Tape Speed Adjustment
Procedure :
Procedure :
1. Playback WS-48A (tape center part) and adjust SFR601 so that
the frequency counter reading becomes 3,000Hz.
Standard value : 2,985–3,015Hz
Standard value : 2,985–3,015Hz
2. Playback WS-48A (tape top and end) .
Check that frequency counter reading is within
±1.0% of the
reading of step 1.
0 dB = 0.775V
set
test tape
WS-48A
(3kHz, 0dB)
WS-48A
(3kHz, 0dB)
frequency counter
32
Ω
phones jack (J301)
[MAIN BOARD] (SIDE B)
SFR601:
Tape speed Adjustment
Tape speed Adjustment
Adjustment Location :
8
HS-RM536/RM539
TUNER SECTION
AM section
BAND : AM
FM section
BAND :FM
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
IFT1
1,400 kHz <1,395kHz>
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust parts
Frequency display
Reading on digtal
voltmeter
L4
530 kHz <531kHz>
Adjustment value : 1.2V
Standard value : 1.1–1.3V
Standard value : 1.1–1.3V
Confirmation 1,710 kHz <1,602kHz> Standard value : 9V or less
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
620 kHz <621kHz>
CT1
1,400kHz <1,395kHz>
FM FREQUENCY COVERAGE ADJUSTMENT
Frequency display Reading on digtal voltmeter
L3
108MHz
Adjustment value : 9.0V
Standard value : 8.7–9.3V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L2
98MHz
Confirmation
108MHz
Adjustment Location : Main board
0 dB = 1
µV
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
done by the trimmer capacitors.
AM RF signal
generator
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
signal.
Output level : as low as possible
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
set
32
Ω
phones jack (J301)
level meter
Frequency Coverage Adjustment
Setting :
Setting :
HS-RM536/RM539
52993
C34
CF1
CF2
X1
BPF1
IN
E
OUT
R24
R23
C37
C38
L5
R6
R4
C14
C9
C33
D2
HOLD
ON
OFF
t
.
FM RF signal
generator
generator
33.75kHz frequency deviation
by 1kHz signal.
Output level :
as low as possible
by 1kHz signal.
Output level :
as low as possible
BPF1 IN
0.01
µ
F
[MAIN BOARD]
(Side B)
(Side B)
HS-RM536/RM539
52993
L3
L4
C853
R15
R7
R13
R5
R11
R19
R12
R8
C17
C7
C858
C857
C16
C18
C12
C13
E
S802
TP
(VT)
-
+
/UP
/DOWN
PRESET/TUNE
t
TP (VT)
[MAIN BOARD]
(Side B)
(Side B)
digital voltmeter
(DC range)
< > : 9kHz step
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