Denon PMA 1055R Service Manual

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D E I l O I l Hi-Fi Integrated Stereo Amplifier

SERVICE MANUAL
MODEL PMA- 1 055R

INTEGRATED STEREO AMPLIFIER

- TABLE OF CONTENTS -

SAFETY PRECAUTION ,. ,2
SPECIFICATIONS . .2
DISASSEMBLY ...... ,4
BLOCK AND LEVEL DIAGRAM .. ,5
ADJUSTMENT ............ ,6
SEMICONDUCTORS ..

PRINTED WIRING BOARD
NOTE FOR PARTS LIST
PARTS LIST OF P.W.B. UNIT ASS'Y . l 12~15
PARTS LIST OF EXPLODED VIEW
EXPLODED VIEW ,.
WIRING DIAGRAM
SCHEMATIC DIAGRAM .
PACKING VIEW .............. .
PARTS LIST OF PACKING & ACCESSORIES ............ 21

[ 0 Some illustrations using in this service manual are slightly different from the actual set. I

NIPPON COLUMBIA C0.. LTD.

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_ PMA-l 055R

SAFETY PRECAUTIONS

LEAKAGE CURRENT CHECK

The following check should be performed for the continued protection of the customer and service technician.

Before returning the unit to the customer, make sure you make either (1) a leakage current check or (2) a line to chassis
resistance check, It the leakage current exceeds 0.5 milliamps, or if the resistance from chassis to either side of the
power cord is less than 460 kohms, the unit is defective.

SPECIFICATIONS

POWER AMPLIFIER SECTION

Rated Output Power:
Both channel driven 80/0th Load:
4 9/0th Load:

Total Harmonic Distortion:

PRE AMPLIFIER SECTION
Rated Output:

Input Sensitivity/Input Impedance:
PHONO:

CD, TUNER, DVD/AUX, TAPE-1/DAT, TAPE-2/MD:

FlIAA Deviation:
PHONO:

OVERALL CHARACTERISTICS
SN Ratio (IHF A Network):
PHONO:
SOURCE-DlRECT:

CD, TUNER, DVD/AUX, TAPE-TIDAT, TAPE»2/MD:

Frequency Response:

Tone Control Adjustable Range:
BASS:
TREBLE:
LOUNDNESS:

OTHERS
Power Supply:

AC Outlets:
Switched x 8:

Power Consumption:

Dimensions:
Net Mass:
REMOTE CONTROL UNIT (RC-843)
Remote Control System:
Power Supply:
External dimensions:
Mass:

* Maximum dimensions include controls, jacks, and covers.

(W) = width, (H) = height, (D) = depth

65 W + 65 W (20 HZ to 20 kHz, T.H.D. 0.07 %)
120 W +120 W (DIN, 1 kHz, T.H.D. 0.7 %)

001 % (-3 dB at rated output, 8 (Hohms) (1 kHz)

150 mV (Recout terminal)

2.5 mV/47 kmkohms
150 mV/47 kfllkohms

20 Hz to 20 kHz :0.5 dB

86 dB (at 5 mV input) (input terminals short-circuited)
ON
107 dB

5H2 to 100kHZ +0, eBdB

100 Hz 1:8 dB
10 kHz i8 dB
100 Hz i6 dB
10 kHz 16 dB

A0230 V, 50 Hz (Europe, Asia, Australia & Hong Kong Models)
A0120 V, 60 Hz (U.S.A., Canada &Taiwan R.O.C. Models)

120 W (U.S.A., Canada & Taiwan R.O.C. Models)
100 W (Europe, Asia & Hong Kong Models)

250 W (IEC) (Europe, Asia, Australia & Hong Kong Models)
4.0 A (U.S.A., Canada &Taiwan ROC. Models)
2 W MAX (Standby)

434 (W) x 144 (H) x 347 (D) mm (17-3/32 x 5-43/64 X 13-21/32)
9.9 kg (21 lbs 13 oz)

Infrared pulse system

3 V DC, Two size R6P (AA") dry cell batteries

54 (W) x 155 (H) x 29 (D) mm (2-1/8 x 6-7/64 x 1-1/64)
100 9 (Approx. 3.5 02) (including batteries)

* For improvement purposes, specifications and functions are subject to change without advanced notice.

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