Yamaha pc2002

Page 1

POWER AMPLIFIER

SERVICE MANUAL

I FRONT PANEL

0 POWER Switch/Indicator
OTHERMAL Indicator
ePROTECTION lndicatars

QPEAK Reading Meters (PCZOOZM only)
OCLIP Indicators

@Meter Zero Adjustment Screws
alnput Attenuators

QCarrying Handles

fiRubber Control Locks (Accessory)

0

I REAR PANEL

P-a

, OSPEAKER Output Terminals
FDU GPIN 1 GND Lift Switch
0 9 Balanced XLR connectors
0 0 Unbalanced Phone Jacks
OBALANCED/UNBALANCED Switch
@ @STEREO/MONO MODE Switch
0Power Cord Holder
9 Fuses
a A
T II ,
' L; Li
0 ' U.S. & CANADIAN models
L--tmlllllll 7
I CONTENTS
SPECIFICATIONS .................. 1 BLOCK DIAGRAM ...................... 4
PERFORMANCE GRAPHS ............. 1 DIMENSIONS .......................... 4
DISASSEMBLY PROCEDURES .............. 2 CIRCUIT BOARDS ...................... 5
CHECKS AND ADJUSTMENTS .............. 3 SCHEMATIC DIAGRAM ......... ........ 10

YAMAHA

NIPPON GAKKl ca. LTD. HAMAMATsu, JAPAN

2300 fl @ Printed in Japan. I I .82

Page 2

PC2002/ PC2002M

I SPECIFICATIONS

POWER OUTPUT LEVEL
Continuous average sine wave power with less than
0.05% THD. 20 HZ to 20 kHz.

Stereo, 3 ohms .............. 240W + 240W

Mono, 16 ohms . V . . 480W
Mono, 8 ohms . 700W
FREQUENCY RESPONSE
10Hzto 50kHz,80hms,1W ............. 5
TOTAL HARMONIC DISTORTION -°-5dB

Stereo 8 ohms 120W
Menu 16 ohms 240W

1 kHz .......... Less than 0.003%

20 to 20 kHz . . Less than 0.007%
Mono 8 ohms 350W
20 to 20 kHz ......... l ...... Less than 0.01 %

INTER MODULATION DISTORTION
70 Hz 7 kHz mixed 4 :1
Stereo 8 ohms, 120W
Mono 16 ohms, 240W .....
INPUT SENSITIVITY
Input level which produces 100W output into 3 ohms
.0 dB (0.775 V rms)

. Less than 0.61%
. Less than 0.01%

INPUT MPEDA CE
Balanced and unbalanced inputs, maximum

attenuator setting .................. 25 kohms
8-OHM DAMPING FACTOR

1 kHz ..................... Greater than 350

20 to 20 kHz ................. Greater than 200
SIN RATIO

Input shorted at @12.47 kHz .............. 110 dB

lnputshorted at @lHFA ................. 115 dB
SLEW RATE

Stereo 8 ohms .................... 60 V/usec

Mono160hms QOV/usec

CHANNEL SEPARATION

8 ohms 120W
1 kHz ....... - ................... 95 dB
_8 ohms 120W
20 to 20 kHz ...................... 80 dB
RELAY MUTING TIME +2
From pow2r on ...................... 4 sec
INDICATORS -1
Power ON ......... , LED
Protection (Relav OFF). . LED '
Thermal Overload (85 +5 degrees C) . . . . LED
Clipping (2% THD) ................... LED

Peak Power Meters (PCZOOZM only)
..... -50 dB to +50 dB range 0 dB = 100W into 8 ohms
FRONT PANEL CONTROLS v
Power Switch _ , .1. . . .
Input Attenuators (one per hannel)
22 detent positions in -1 dB steps
,,_1 -1..~20,°°)
REAR PANEL CONTROLS/CONNECTORS
Mode switch ................. STEREO/MONO
Pin 1 GND Switch (XLR connectors) ........ ONIOFF
Balanced/Unbalanced Switch
....... BALANCED (XLFIVUNBALANCED (PHONE)
POWER REQUIREMENTS

Push-ON/Push-OFF

U .5 SI CANADIAN models .......... ACIZOV 60 Hz

GENERAL Model .......... AC220/240V, 50/60 Hz
DIMENSIONS

(WxDxH) ......... ,.., 480x413x183mrn

(18 -7/8 x16<1l4 x 7-1/4")

WEIGHT
PC2002 . . . . . 20 kg (44 pounds)
PCZOOZM . . . . 20.5 kg (45 pounds)

All specifications subject 20 change without notice.

.PERFORMANCE GRAPHS(STEREO MODE)

0 Frequencv Response

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FREQUENCY

0 T.H.D. vs Frequency

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FREQUENCY

0 T.H.D. vs Output Power (Single channel driven)

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ouYPuYPOWER

O T.H.D. vs Output Power (Both channels driven)

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