Sanyo RD 4600 Service Manual

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rig sANYo

SANYO
CASSETTE TAPE DECK

32D4600UM
SERVICE MANUAL

Page 2

SPECIFICATIONS

Recording System:
Erasing system:
Tape speed:
Recording time:
RM 5. F. Fwd time:
anuoncy lunches:

Sim-I to Noise min:

Wow It Flutter:
Bias oscillntar iroqiunce:
lnput terminal:

Output terminal:

Power carsumption:
Power source:
Dim-mien (approx):
Weight (approxl:

AC bias 4 track 2 channel
AC erase
1~7l8 IPS. (4.75 cm/sec.)
60 min (C-SOl
1 min. 30 sec. ((2-60)
30 ~13,000 Hz
30 ~ 16,000 Hz (Cr02 tape)
Dolby OFF: SOdB

ON: 58 :18
0.07% WRMS
90 ~103 kHz
MIC: -70 dB 200 ~10 k ohm
AUX IN: -20 (18 100K ohm
DIN INPUT: ~56 dB 10K ohm
LINE OUT. .775V 2K ohm
DIN OUTPUT: 0.775V 2K ohm
HEADPHONE: 30mV 8 ohm
20W
ACHO125,220V 50/60 Hz
466 x 284 x104 mm
7.5 kg

DISASSEMBLY INSTRUCTION

1550.?

95"

WN

Remove the AC power supply cord form the unit.

Remove the Dolby level control knobs on the front of the unit.
Put the unit from side down on a soft sheet.

Remove two washers and legs each at the front on the cabinet
bottom.

Turn over unit and take away the chassis from the cabinet.
Remove the seven screwa (Pan Hd. Tapping 3 x 8 4, Pan Hd. 3 x
35 1, Pan Hd. 3 x 30 2) fixing deck panel to chassis.

Remove four lwel control knobs from shafts.

Pull out a shaft from hinge for meter panel and operation panel.
NOTE:

Should not lose two spring coils for meter deck panel.

To remove the meter deck panel from operation panel, pull out a
pin fixing damper of panel-up mechanism to chassis, and remove
the two jumper lead's plugs which connect deck panel with
chassis.

PINCH ROLLER ADJUSTMENT

1.
2.

3.

Set the unit into the PLAY mode.

Apply a tension gauge to the pinch roller. Read the gauge at the
precise moment when the pinch roller separates from the
capstan.

If the gauge reading falls more than 100 gr, no adjustment is
necessary. If otherwise, make adjustment by changing the force
of the spring coil. (See exploded view No. 17)

TORQUE ADJUSTMENT

1.

2.

Set the unit into the PLAY, FAST FORWARD or REWIND
mode.
Measure the each torque with a torque gauge. They should be as
following:

PLAY 30 - 50 gr/crn

FAST FORWARD more than 90 gr/crn

REWIND more than 90 gr/cm
It the each torque fails to reach the standard value. Clean the
drive belt, flywheel. motor pulley, take»up' reel, take-up pulley,
idler and rewind roller with a cotton swab soaked in alcohol.