Nippon DENON DR-M12HX User manual

DENON.
„=.
SERVICE
MANUAL
STEREO
CASSETTE
TAPE
DECK
MODEL
DR-M12HX/M14HX
DR-M14HX
NIPPON
COLUMBIA
CO.
LTD.

TABLE
OF
CONTENTS
FEATURES.
SPECIFICATIONS
BLOCK DIAGRAM .
LEVEL DIAGRAM.
PART
NAMES
AND
FUNCTIONS.
DISASSEMBLY
INSTRUCTIONS
..
ADJUSTING
AND
CHECKING
THE
:
MECHANISM
SECTION
ADJUSTING
THE
ELECTRICAL
SECTIONS.
PARTS
LIST
OF
P.W.BOARD
я
2
PARTS
LIST
OF
EXPLODED
VIEW...
EXPLODED
VIEW
OF
CABINET
AND
CHASSIS
GROUP.......
PARTS
LIST
OF
VM151
MECHANISM
UNIT
. З
EXPLODED
VIEW
OF
VM151
MECHANISM
UNIT
WIRING
DIAGRAM
(DR-M12HX)
WIRING
DIAGRAM
(DR-M14HX)
SCHEMATIC
DIAGRAM
OF
AUDIO
UNIT
(DR-M12HX)
SCHEMATIC
DIAGRAM
OF
POWER
UNIT
(DR-M12HX)
SCHEMATIC
DIAGRAM
OF
AUDIO
UNIT
(DR-M14HX)
SCHEMATIC
DIAGRAM
OF
POWER
UNIT
(DR-M14HX)
.
P.W.BOARD
OF
20-1436
AUDIO
UNIT
..
P.W.BOARD
OF
2U-1437
AND
2U-1438
UNIT
SEMICONDUCTORS
ОЗЕ
ЕЕ
FEATURES
Ш
Computer
controlled
silent
mechanism
Ш
Non-slip
reel
drive
for
stabilizing
tape
tension
E Dual power supply
Ш
High
performance
SF
В/Р
head
Ш Dolby HX PRO system
№
Dolby
В
&
С
noise
reduction
system
Ш
Manual
bias
adjustment
control
№
Large
fluorescent
display
panel
№
Computing
tape
counter
with
4-digit
readout
and
memory
stop
Ш
Music
search
system
W
Versatile
infrared
remote
control
(DR-M14HX
only)

SPECIFICATIONS
ө Type. . Vertical tape loading 4-track 2-channel stereo cassette tape deck
@Heads. . . Record/Playback (SF В/Р head)
Erase (Double gap ferrite head)
М Capstan (DC servo motor) х1
Reel (DC motor) x1
Actuator (DC motor) x 1
© Таре Speed . 4.8 cm/sec.
• Fast forward, rewind time . Approx. 100 sec. with a C-60 cassette
e Recording bias .. Approx. 105 kHz
e Overall S/N ratio............... Dolby C NR on... more than 72 dB (CCIR/ARM)
(at 3% THD level)
e Overall frequency response .... 25 ~18,000 Hz +3 dB (at —20 dB METAL tape)
© Channel separation. ‚ more than 40 dB (at 1 kHz)
© Crosstalk. . more than 65 dB (at 1 kHz)
eWowś.flutter................. 0.045% wrms, +0.1% w. peak
© Inputs
ОРАО ИЗВЕ tees 80 mV (— 20 dBm) input level at maximum
Input impedance: 50 Корт unbalanced
e Outputs
Пе рот E 620 mV (—2 dB) output level at maximum (with 47 kohm load,
recorded level of 200 pwb/mm)
ћеадрћопе........./........ 1.2 mW output level at maximum (optimum load impedance 8 ohm
—1.2 kohm)
9 Accessories . „Parallel pin cord х2
e Power supply . 50 Hz/60 Hz compatible, voltage is shown on rating label
e Power consumption . .18 W
e Dimensions аи а лг дал 434 (W) x115 (Н) x286 (D) mm
eWejght 2202025330 4.5 kg
Ш Above specifications and design styling are subject to change for improvement.
Wi Dolby noise reduction апа HX PRO headroom extension manufactured under license from Dolby Labo-
ratories Licensing Corporation. НХ PRO originated by Bang and Olufsen. "Роїбу", the double-D symbol
and “HX PRO” are trademarks of Dolby Laboratories Licensing Corporation.
WARNING:
1. Component parts
Parts marked with A and/or shading in this service manual have special characteristics important to
safety. Be sure to use the specified parts for replacement.
2. Leakage current 2
Before returning the appliance to customer, test the leakage current when the power plug is connected.
Use a calibrated (with an error of not more than 5%) leakage current tester and measure the leakage current
from any exposed metal to the earth ground. Reverse the power plug polarity and test the above again.
Any current measured MUST NOT EXCEED 0.5 milliamps. Corrective measure must be taken if it exceeds
the limit.

BLOCK DIAGRAM
7
шпон
оча
XH
ѕэмона
|
|
.—o—
WU
шл
по
3NI1
w
ану
3NOHd
аузн
58
dW
ŁOLHL
6
ILAW
{SApJJY
2045150021)
—O
1vL3W
©
3WOYHO
O
TYWHON
HOLIMS
HL
Iv
оз
озн
айу
15008
$0651
103135
З4У1
123136
8"021/6"04.
РОШ.
му»
93H
ва
ану
o3
эчт
7
138431
1NdLno
9I
W3LSAS
YN
A8700
змолол
ам!
аузн
d/H
9%
5
шол
ov
Ta
NI
МІ
змолол
30NV
Iva
w

| LEVEL DIAGRAI
PLAYBACK SYSTEM
TCC-130 DOLBY B-TYPE
400 Hz 200 nwb/m
DOLBY NR OUTPUT HEAD PHONE
PB EQ AMP SYSTEM IC LEVEL AMP
(> > i 38] موم󰾯 Рр |
RA
E,
зо]
me—^[]
HEAD
PHONE
Маш LINE
LY
(Reh)
LINE OUT
(dB) 0
чо 4
LINE OUT
ost PHONE OUT
-204
5 -30-]
-40-]
-504
-60-1
-то-|
RECORDING SYSTEM
INPUT FREQUENCY
400 Hz
BALANCE INPUT DOLBY NR ВЕСЕО HX
VR VR SYSTEM С BOOST AMP PRO
us sof ses је p
«ер
ро
Ef
dB (METAL)
—— -4.86B (Cro)
-о
4
T
:468
(NORMAL)
-ao 了
EM
-so 了
-во 4
-то 4