Mitsubishi dp ec7 service en

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MITSUBISHI

AUDIO SYSTEMS

A

SERVICE MANUAL

TURNTABLE
MODEL DP-EC7

CONTENTS

SPECIFICATIONS/OPERATION ....................................................... 2
DESCRIPTION AND FUNCTION ...................................................... 3
ASSEMBLING ................................................................... 4
CARTRIDGE INSTALLATION CHECKS ................................................. 5
ADJUSTMENT ................................................................... 6
TONEARM REPLACEMENT ......................................................... 8
WIRING ....................................................................... 9
PRINTED CIRCUIT BOARDS ........................................................ 11
SCHEMATIC DIAGRAM ........................................................... 13
EXPLODED VIEW ............................................................... 15
MECHANICAL PARTS DESCRIPTION ................................................. 16
PARTS LIST ................................................................... 17
PACKAGING INSTRUCTION ......................................................... 18

MELCO SALES INC.

3030 East Victoria Street Compton, California 90221

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SPECIFICATIONS / OPERATION

1. PHONO MOTOR SECTION 2. TONE ARM
Type ............... Electronically controlled fully Type ............... J-type universal static balanced
automatic operation Overall length ......... 320 mm (12-5/8)
Drive mechanism ....... Direct drive Effective length ........ 227 mm (8-15/16")
Motor ............... 8 pole coreless DC servo motor Overhang ............ 14 mm (9/16)
Platter Diameter ..... 32.4 cm (12-3/4") Tracking error (30 cm LP) , +2.90- -1.50
Weight ...... 1.3 kg (2-7/8 lbs) Offset angle ........... 22°
Material ..... Aluminum die-cast Head shell Material ..... FRP
Platter speed .......... 33-1/3.45 r.p.m. Weight ...... 6.6 9
Wow and Flutter ....... 0.03% (Wrms) Possible cartridge weight 5 g to 10.5 g
i 0.04% (Wp-p,DIN 45-507)
Signal to noise ratio ..... 60dB (lEC-B) 3. GENERAL
73dB (DIN B)
Power consumption ..... 9W

Design and specifications
notice for improvement.

are subject to change without

454 x 140 x 380 mm
(17-7/8 x 5-1/2 x15")
Weight .............. 8.5 kg (18-3/4 lbs)

Dimensions (W x H D) . . . .

SCHEMATIC REPRESENTATION OF DP-EC7 AUTOMATIC FUNCTIONS

Power on: turn the locking arm of the Stylus-lift priority: press ( YA I to 8)
arm rest in a counterclockwise direction. C? -> ? reverse stylus descent. Stylus ascent %
Tonearm becomes free. cannot be reversed before completion. I
' VA
; i r I I. t I I k _ _ - P
. Free travel: ress 4 and > buttons I- I
Auto lead-in: press the start (4 I button I V; p ( ). .( ) . . I %
once to commence audition to move the tone arm in either direction,
' I then ( VA ) to lower it. I I: I I I
4 I 4 VA >
L Wk 1 1 l,
I ~ . . e-t-i
A . h t r I Return: if, while pressmg I?) the tone I E v
uto rein?!" ttehtonedarmtge urns V . arm moves over the edge of the disc, it
automatica y a t e en 0 e 'SC' will return rapidly to rest. I
b
_ 1 J,_; _,l_ _ I L- _ _
#3) chk response: any movement except II 1 , v
A cut. press the StOp ( . button lift/cue of the stylus can be interrupted \
once to Interrupt and end disc audition. I r by a new command. I I
D 4 P
It _-4 I L IL
Free access lead-In: continue to pressltlhe O Stylus protection: when there is no disc C 1 g
" v on %
ra ' T
. l r rn to
released. Press the lift/cue button I u I I I l: descend, and the tone arm W' etu I
to lower it. u rest.
Jl._ L 1 _ . _ 1
Repeat: pressing the repeat button turns I n $.____I Manual lead-in: first switch on the n r b
the repeat function alternately on and I V platter motor, then lift the stylus over to I S
off. When on, the indicator lights. :0. the lead-in groove. I [-
T - T /__
- a? . /
Lift-up and cueing: pressing the lift/cue II . Manual lead-out: Ilft the SWIUS and n 0 T Q,
I VA ) button alternately lowers and \ return the tone arm to the rest p05ition. -§
raises the tone arm. I The platter will stop automatically.
VA
_ _ - ji- _ _