Onkyo C 1044 F Service Manual

Page 1

ONKYO SERVICE MANUAL

CP-1044F

SERIAL NO. 3159

QUARTZ LOCKED DIRECT DRIVE
FULLY AUTOMATIC TURNTABLE
MODEL CP-1044F

UDN, UD

120V AC, 60 Hz

UU

110/120/220/240V AC, 50/60 Hz

SAFETY-RELATED COMPONENT WARNING

COMPONENTS IDENTIFIED BY MARK 11; ON
THE SCHEMATIC DIAGRAM AND IN THE PARTS
LIST ARE CRITICAL FOR RISK OF FIRE AND
ELECTRIC SHOCK. REPLACE THESE COM-
PONENTS WITH ONKYO PARTS WHOSE PARTS
NUMBERS APPEARASSHOWN IN THIS MANUAL

MAKE LEAKAGE-CURRENT OR RESISTANCE
MEASUREMENTS TO DETERMINE THAT
EXPOSED PARTS ARE ACCEPTABLE INSU-
LATED FROM THE SUPPLY CIRCUIT BEFORE
RETURNING THE APPLIANCE TO THE
CUSTOMER,

ONKYO
Ilium BIIMPflNEle

SPECIFICATIONS

Type:

Turntable Platter:
Motor:

Speeds:

Wow & Flutter:
Signal-to-Noise Ratio:
Tonearm:

Effective Arm Length:

Overhang:

Offset Angle:

Maximum Tracking
Error:

Suitable Cartridge
Weight:

Tracking Force:

Other Features:

Quartz locked direct drive
fully automatic turntable
with auto lead-in and return,
reject, repeat, cue and search
button functions, two-motor
micro-computer design

310 mm (12-1/4") aluminum
diecast.

Quartz loked direct drive
brushelss DC motor

33-1/3, 45 rpm

less than 0.025% (WRMS)
better than 75dB (DIN B)
Staticaliy balanced straight
type

224 mm (SJ/8)

13 mm (1/2)

21 degrees

+3 degrees, A I .5 degrees

Min. 5, Max. 9 grams

0 - 3.0 grams

Tracking force direct readout
scale

Removable headshell
Anti-skating device

Page 2

P71044F

_2_

Dimensions (W x D x H) 4l8 x 376 x 132 mm
(16-1/2" x 14-13/16 x
5-1/5)

Weight: 6.0 kg (13.2 lbs.)

Accessories: Headsheell, counterweight,

overhang gauge, adapter.
instruction manual

Optional Recommended Headshell: SH-Zl E

Specifications are subject to change for further product
improvements.

SERVICE PROCEDURES

Insulation resistance measurement
Connect the insulating-resistance tester between the plug of
power supply cord and chassis.
Specifications; D model

G/W models

500 V 3.3 i033 MO.
500 V more than 10 M9

ADJUSTMENT PROCEDURES

1. Return sensitivity adjustment (fig. 1)

Turn the unit upside-down and, with the DD motor and
arm motor connector removed, connect a DC voltmeter
between TP and GND. Move the arm to the inside of the
platter, put the return sensor in the release position and
shut out extraneous light. Starting with the semi-fixed
resistor R703 set all the way to the left, begin to rotate
the resistor clockwise to the point where the voltage
between TP and GND rises 2mV above low (a few
hundred mV).

2. Platter height adjustment (fig. 2)
Return the unit to the upright position and rotate the
float base height adjustment screw. Adjust so that the
platter height is 13mm i 2mm above the cabinet.

3. Stylus height adjustment

Set the tonearm in the up position and adjust the

lifter plate screw so the height of the stylus tip is

8mm i lmm above the platter mat.

Note 1: The height should be 11mm i 2mm measured
from the surface of the platter.

Note 2: Rotate the lifter plate screw counterclockwise
to lower the stylus height and clockwise to
raise the stylus height.

4. Lead-in count adjustment (Tracking force: 2 grams
Anti-skating force: 2 grams Speed: 45 rpm)
Using test record ONK-IOOO, adjust so the lead-in
count is 10-20 counts for both 30cm and 17cm records.
Adjust using the PU pulley shutter and NCDG-1731
printed circuit board jumper lead.
The count changes in the following manner as the jumper
leads are cut:

Jumper lead A 3 count changes
Jumper lead B 6 count changes
Jumper lead C 12 count chnages
Jumper lead i cut: - . connect: +

5. Return count adjustment (Speed: 45 rpm)
Using test record ONK-lOOO, adjust so the 3mm pitch
return count is 24-26 counts. Adjust using the PU
pulley eccentricity pin. Confirm that the tonearm does
not return until 22 counts at a pitch of lmm.

R703»1K ohm

Return ADJ.

LEAD-in ADJ.

fig. 2