Sherwood Turntable PM 9901 User Manual

 
PRECAUTIONS  
Thank you for purchasing this fine product – STEREO TURNTABLE.  
Taking time to read these operation instructions carefully.  
Read this manual carefully before using the unit and be sure to store the manual in a safe place for future reference.  
1. Power sources  
• Cartridge may pick up slight sound pressure or  
vibrations of the speakers coming along the  
floow or though the air resulting in feedback or  
howling sound. Find a location which is very  
stable and vibration free.  
• The legs have functions for adjusting the height  
of the unit itself. Adjust the legs to stabilize the  
main body horizontally..  
This product should be operated only from the type  
of power source indicated on the marking label. If  
you are not sure of the type of power supply to your  
home, consult your product dealer or local Power  
Company.  
2. Installation precautions  
Do not install the unit in any of the following  
locations since this may result in a deterioration in  
performance or malfunction:  
3. The model may not be able to perform at its best in  
an extremely cold envirnment. The optimum  
ambient temperature range is 0oC to 35oC.  
Locations exposed to direct sunlight or near  
object radiating heat such as heating  
appliances.  
• Locations exposed to moisture or humidity.  
OPERATION PRECAUTIONS  
1. Always clean the stylus both before and after  
playing a record with a soft brush, and try to make  
it a rule to clean the record with a soft brush and  
try to make it a rule to clean the records with a  
good quality cleaner.  
4. Place only one record at a time on the platter. If  
two or more records are sacked on the platter, the  
stylus will not make proper contact with the  
grooves, and this will impair the quality of  
reproduction.  
2. Be careful not to make the turntable vibrate while  
a record is playing, since this can result in  
damage to the stylus and record.  
5. Volatile materials should not be used, such as :  
alcohol, thinner, benzone etc. They may remove  
the painter or damage the lustre, please avoid.  
3. When clanging over the headshell, clamp the  
tonearm to the arm rest so that the tonearm shaft  
is not strained in any way.  
1
 
NAME OF PARTS  
1). 45-rpm Adaptor  
2). Slip Mat  
3). Center Spindle  
12). LED display for speed indication Green LED : the  
pitch control slider is in center click position and the  
speed is quartz-controlled.  
4). Strobe Dots  
5). Power Switch / Strobe  
6). Start/Stop Button  
Red LED : the speed was changed with the pitch  
control slider  
13). Pitch Control Slider  
7). Beat Out : Frequency output of beat out is 675Hz  
while pitch is in middle position 0%  
8). Taget Light  
14). Tonearm  
15). Trim control for changing the range of the pitch control  
16). Arm Rest  
9). Remote Control : This jack can be connected with an 17). Cueing Lever  
external switch to perform the Start/Stop operation.  
10). Headshell  
18). Anti-skate Knob  
19). Counterweight  
11). Speed Select Buttons  
20). Position for Preparing Cartridge  
21). Hinge for Dust Cover  
2
 
BEFORE USE  
CONNECTIONS  
1. Connect the power cord to the auxiliary power  
outlet on the rear panel of your amplifier or  
receiver or to a household AC outlet.  
Check following parts included in the package with  
the main unit:  
2. Connect the unit output terminals to the PHONO  
jack of your amplifier or receiver.  
1) Turntable platter  
2) Slip mat  
Output terminals  
L (White)  
Amplifier(Receiver)  
L Channel  
R Channel  
GND  
3) Dust cover  
4) 45-rpm adaptor  
5) Counterweight  
6) Headshell  
R (Red)  
GND (Spade)  
7) Operating instructions  
NOTE:  
Be sure to connect the ground terminal firmly to the  
amplifier or receiver.  
If this connection is not made or is loose, a power  
sourceHUMwill result.  
*Notes:  
1) Do not connect the AC power plug before  
assembly has been completed.  
2) Before turn on the power, check that the voltage  
settings is correct.  
3) Read this manual carefully before using the unit  
and be sure to store the manual in a safe place for  
future reference.  
SPECIFICATIONS  
General  
.……….……….....  
Power supply AC 230V~ 50/60Hz  
..…..………................  
Power consumption  
Dimension(WxDxH)  
Weight  
12 Watts  
PLACEMENT  
..…...........  
450 x 350 x 145 mm  
...........................…........…..............  
Do not place the unit in a location where it will be  
exposed to direct sunlight or near a heating  
appliance.  
9.6 Kgs  
For improvement purposes, specifications and design  
may be changed without notice.  
Do not place the unit in a location where there is  
high humidity or a lot of dust.  
Cartridge may pick up slight sound pressures or  
vibrations from the speakers coming along the  
floor or through the air resulting in howling. Find a  
location which is very stable and vibration free.  
The legs have functions for adjusting the height of  
the unit itself. Adjust the legs to stabilize the main  
body horizontally.  
MAINTENANCE  
Clean the stylus periodically with a soft brush to  
prevent the accumulation of dust.  
When the sound becomes distorted or noisy,  
check the stylus. If worn out, replace it with a new  
one.  
From time to time,the dust cover and turntable  
cabinet should be wiped with a soft,dry cloth.  
Any volatile materials such as alcohol, thinner,  
benzine, ect., may remove the paint or damage  
the lustre and should not be used.  
3
 
ASSEMBLY  
1. Remove the main unit with the packing from the  
box and take off the packing.  
2. Set the 45-rpm adaptor on the main unit.  
3. Insert the turntable platter onto the center spindle.  
4. Set the slip mat on the platter.  
5. Installation of cartridge:  
When installing a cartridge, refer to the operating  
instructions of that cartridge.  
(d) Rotate the counterweight until the tonearm is  
approximately balanced horizontally (floats freely).  
(e) Refasten the tonearm with the arm clamp.  
(f) Hold the counterweight stationary with one hand  
and rotate only the stylus-pressure ring to bring  
the number "0" of the ring into alignment with the  
center line on the tonearm rear shaft.  
During installation, attach the stylus protector to  
guard the stylus tip from damage.  
(1) Connect the lead wires to the cartridge  
terminals. The terminals of most cartridges are  
color coded.  
Connect each lead wire to the terminal of the  
same color.  
.............……………....  
....……………...............  
White (L+)  
Blue (L-)  
Left channel+  
Left channel-  
Right channel+  
Right channel-  
..…………...................  
Red (R+)  
.......…………….........  
Green (R-)  
(2) Install the cartridge to the headshell and tighten  
it with screws provided with the cartridge.  
(g) Rotate the counterweight clockwise until the scale  
shows the value corresponding to the pressure of  
the used stylus. The stylus pressure of the installed  
pick-up system is 2 g. If you use a separate pick-up  
system, please follow the manufacturer’s  
instructions.  
6. Insert the headshell into the front end of the  
tonearm, then turn the lock nut clockwise with the  
headshell firmly held horizontally.  
7. Slide counterweight onto tonearm.  
Twist it lightly and it will screw onto the rear shaft  
of the tonearm.  
9. Set the anti-skating control knob to the same value  
as the stylus pressure.  
8. Adjustment of horizontal zero (0) balance and  
stylus pressure:  
(a) Remove the stylus protector, do not touch the  
stylus tip during the adjustment.  
10. Install the dust cover to the main unit.  
(b) Set the cueing lever to the lower position.  
(c) Release the arm clamp and lift the tonearm from  
the arm rest to free it.  
4  
 
OPERATION  
STYLUS REPLACEMENT  
1. Push the power button to turn on the power, the  
speed indicator and the strobe-illuminator will light up.  
2. Place a record on the slip mat, when playing a  
45rpm record with a large center hole, place the  
45-rpm adaptor on the center spindle.  
The life expectancy of the stylus tip is 500 hours. For  
the sake of maximum sound quality reproduction, we  
recommend replacement within the minimum time limit.  
1. The stylus tip is replaced by grasping the stylus  
holder and pulling it away from the body of the  
cartridge.  
3. Set the speed to match the record.  
4. Remove the stylus protector, release the arm clamp.  
5. Set the cueing lever to the up position.  
6. Press the Start/Stop button, the turntable platter  
will start to rotate.  
2. The new stylus tip s then inserted by pushing it into  
the receptacle.  
7. Move the tonearm over the desired groove.  
8. Set the cueing lever to the down position, the  
tonearm will descend slowly onto the record and  
play begins.  
9. When play is finished, raise the cueing lever, move  
the tonearm to the arm rest, secure the tonearm  
with the arm clamp.  
10. Press the Start/Stop button to stop the platter  
rotating, push the power button to turn off the power.  
Suspend play  
Set the cueing lever to "UP"position during play, the  
stylus tip of the cartridge will be lifted from the record.  
Target light  
CARTRIDGE REPLACEMENT  
This unit is provided with a target light for illumi- nating  
the stylus tip during play.  
Remove the headshell from thd tonearm, and the  
screws that hold the cartridge. Pull out the four lead  
wires from the cartridge itself. To protect the lead  
wires at this point, remove the terminal pins with  
pliers or the tip of the screwdriver.  
Push the target light button, the target light will be  
raised into position for illuminating the stylus tip.  
When not in use, keep the target light lowered  
through depression.  
The terminals on the accessory headshell are aligned  
according to the arrangement below. Check the  
location and polarity of each of the cartridge’s  
terminal pins and then connect the lead wires, taking  
care not to get the polarities mixed up.  
CHANGING THE SPEED  
Red  
: Right channel  
As long as the pitch control (13) is in center click  
position,the turntable is operated witch quartz- controlled  
rated speed.The green LED (12) will then be lit.  
The speed can be increased or decreased by 10% via  
the pitch control (13). The red LED (12) will then be lit. If  
the change of speed does not correspond to the pitch  
control change, it is possible to correct this with the trim  
control (15).  
White : Left channel  
Green : Right channel ground  
Blue  
: Left channel ground  
An incorrect adjustment done on purpose can also be  
used to have the turntable rotate extremely slow or fast.  
The strobe dots (4) at the edge of the turntable issued  
for speed monitoring.  
5  
 
GENERALSPECIFICATION  
1. APPLICATION :  
This spectftcation applies to the Direct drive turntable unit PM-9901  
2. TURNTABLE SECTION:  
Type  
2-speed full manual  
Motor  
8 pole, 2phase, brushless DC motor  
Direct Drive  
330mm dia. Aluminum diecast  
33-1/3 and 45 rpm  
Driving Method  
Turntable plater  
Speeds  
Wow and Flutter  
S/N ratio  
Pitch Controls  
Starting Time  
Time for speed change  
Beat Output  
Less than 0.15% WRMS(JIS WTD)  
More than 55 dB(DIN-B)  
+/- 10%  
Less than 1 sec.  
Less than 1 sec.  
675 +/- 1Hz(pitch contol set 0%)  
6~10.5mm  
High of cue (first track)  
3. TONEARM SECTION  
Type  
Static balanced S-shaped tone arm with  
detachable headshell  
Effective Arm Length  
Overhang  
220mm  
10mm  
Tracking error  
Less than 3 degree  
0-4g  
6-10g  
Tracking Force Adiustment range  
Applicable cartidge weight  
Anti-skating range  
0-4g  
Needle Pressure range  
1.5-2g  
4. GENERAL SECTION:  
Power Supply  
Power consumption  
Dimensions  
AC 230V ~ 50Hz  
12 Watts  
450(W) × 350(D) × 145(H) mm  
9.6Kgs  
Weight  
5. SPECIFICATION:  
DESCRIPTIONS  
(1) Output Difference  
(2) Output Level  
(3) Speed (Speed range)  
(4) Speed (Center Range)  
(5) Wow and Flutter  
UNIT  
dB  
mv  
Hz  
Hz  
%
NOMINAL  
2.3  
1.7~3.5  
LIMIT  
2.5  
1.5~3.5  
2.7K , 3.3K ↑  
2995~3005  
0.13  
2.7K , 3.27K ↑  
2990~3010  
0.15  
(6) Channel separtion  
dB  
16  
15  
6
 
TROUBLESHOOTING  
Sometimes, an operational fault can be mistaken for a malfunction or failure. Check the following points and see if  
you can find the symptoms of the trouble below before you get in touch with the serviceman. If you cannot locate the  
symptoms, contact your nearest dealer.  
Symptom  
Possible Trouble  
Power cord is unplugged.  
Remedy  
Platter does not  
rotate.  
Plug cord securely into wall outlet.  
No Sound  
Phono cables are not connected properly.  
Headshell is not properly attached.  
Cartridge lead wires are loose.  
Connect cables securely to the PHONO input  
jacks on the amplifier.  
Fimly secure tonearm locking collar  
(see page 4).  
Attach lead wires inside headshell properly.  
Amplifier is not being operated properly.  
(function switch, tape monitor switch, speak  
switches, etc. are not set correctly).  
Read the operating instructions that come with  
amplifier.  
Musical tempois  
off.  
Platter speed is not set properly.  
Refer to “Operation” and their uses on page 5.  
Refer to “Operation” on page 5.  
SPEED ADJUSTMENT knob is not set  
properly in accordance with the platter speed.  
Excessive noise.  
Ground lead is not connected.  
Connect properly to the amplifier’s ground  
terminal.  
Tracking for is not correct.  
Refer to tracking force adjustment on page 4.  
Clean the stylus tip with a soft brush.  
Clean the record with a good quality cleaner.  
Clean the stylus tip with a soft brush.  
Refer to tracking force adjustment on page 4.  
Replace with new stylus.  
Dust or dirt has collected on the stylus tip.  
Dust or dirt has collected on the record.  
Dust or dirt has collected on the stylus tip.  
Tracking force is not correct.  
Sound is distorted.  
Stylus is worn.  
Amplifier’s tone controls are set too high.  
Set tone conrols to lower position.  
Tonearm does not  
descend.  
Cueing Laver is set to UP position.  
Tracking force is not correct.  
Set to DOWN position.  
Refer to tracking force adjustment on  
page 4.  
Intermittent sound.  
Replace with new stylus.  
Replace record.  
Stylus is worn.  
Record is scratched or warped.  
7  
 

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