Yamaha PC5002M User manual

DUAL CHANNEL POWER AMPLIFIER
.FRONT PANEL
PAOASSIONAL SERIES
POWER AMPLlFliR
O TNEllMlL O ,,.."a WN
[s
@ CHANNEL A CHANNEL B
CJ PUSH ONIWIH POWER Of- O
WF-
-0B
Q,
REARPANEL .............................. 1
SPECIFICATIONS ........................... 1
NAMESOF THE PARTS. ...................... 2
DISASSEMBLY INSTRUCTIONS, ................ 3
GENERAL ADJUSTMENTS .................... 4
PRINTED CIRCUIT BOARD LAYOUT .............
5
PARTSLIST ............................ 1-17
COMPLETE CIRCUIT DIAGRAM
WIRING
NIPPON GAKKI CO., LTD. HAMAMATSU,.JAPAN
2.2K O Pr~nted ~n Japan.3.83.

1 .REAR PANEL
!
Japan Model
I
European Model
Continuous RMSOutput Power
STEREO 8S2(20Hzto20kHz.THD 0.003%) . 500W + 500W
4n(20Hzto 20kHz,THD 0.01%) . . 750W+750W
BTL(MON0)8n(20~zto 20kHz.THD 0.01%) ...... 1500W
Power Bandwidth
250W18S2, THD 0.1% .............. 10Hzto 100kHz
Input Sensitivityjlmpedance
500~/8n ........................ 1.73~/25ka
Frequency Respoqse
8n, 1W ................... 10Hzto 100kHz 2 dB
Subsonic Filter .................. fc=7Hz, -12dBloct
Signal-to-NoiseRatio (IHFA, RL=~S~) ........... 122dB
Total Harmonic Distortion(STEREO)
20Hz to 20kHz, 250W1852 ........... 0.003% less than
USA Model
Primary Fuse .............. 15A, 250V x 2(USA model)
T6.3A, 250V x 2(Europeanmodel)
15A, 125V x 2(Japan model)
Power Supply
................. AC 120V(USAmodel)
AC 220/240V(European model)
AC 100V(Japanmodel)
Power Consumption (EIAJ) .........
1000W(Dualchannel)
Dimensions(W x H x D) ............ 482 x 289 x 482 mm
19 x 11-318 x 19 inch
Weight ......................... 61 kg(134.2 Ibs)
'Specifications subject to change without notice.

I. .y7fi/\'-&Lbf b, ....../fs:,7 79- b, F5-f
7'9- I.m2t%fi~W$~b.
y-f Fn/f-&ibf T, ...... V~P 39- r, wa;R b ?>xm?#@fiTi$rb,
k- + 9>3 (1) 7) %Ibfb, ....../f7-9- I. U)2#@h'qiETTo
~-sY)L~=.Y b &LZ~T, ...... A~Q- I.. an1, I/-:/- I.mnt%fi.rwa-r.it,
*I.~i'j/\'-&LbqT, ......y-f%- Fp- I.,
$-I5 I.?>Xm9#@fiTii$Tb0
7a>~./f+~b&IbTb.......$-9-9- b.
3-9-?>I:'/- b,LED9- bm5Zt%fiq6$Tb0
Removal of top cover : buffer circuit board, drive circuit board can be replaced.
Removal of side covers
: sub power supply circuit board, sub power supply transformer can be replaced.
Removal of heatsink (rear) : power circuit board can be replaced.
Removal of terminal unit : input circuit board, output relay circuit board, can be removed.
Removal of bottom cover : diode circuit board, main power transformer can be replaced.
Removal of front panel : meter circuit board, meter lamp circuit board, LED circuit board can be replaced.
TERMINAL UNIT
1- .y I.
/f7-9- b (L) /f7-9- b(R)
POWER C.BOARD(L) POWER C.BOARD(R)
I
7~4 a-
9- b(
DIODE
C.BOAF
BUFFER C.BOARD
/f>y 7 7 9- b
~7<7"*9- b(L) P74?>- b(R)
DRIVE C.BOARD(L) DRIVE C.BOARD(R)
POWER C.BOARD(R) POWER C.BOARD(L)
/f7->- b(R) /f7-9- b (L)
I
I Cl~oF'U'UDR ELAY
LYTlC
I CAPACITOR I
$+'> $4>
b7>Z b7>X
MAIN POWER TRANSFORMER
5+"-14-- P
-5- b (L)
DIODE
C.BOARD(L)
7' VltiR
$--57-7>7O
9- b
>- b b7>Z
METER LAMP P ""A Q
.Y C.BOARD SUB POWER TRANSFORMER I
SUB POWER SUPPL
I
LED9- b
LED C.BOARD
".Y"T\I ID
1
I
1' METER
ATTE NUATO R
POWER'SWITCH
7syyq.-9-
/f7--44*~7-
2

I
.DISASSEMBLY INSTRUCTIONS
2, tt-i E'/I=+JLOlMfLft
Om$P&ibfLdf.
3, k- 1.929 ('l7') OlMf l.3
@. @o,+'iflbf Ldb.
4, * t- lrnlr-mM+ LA
8. 0m+5%ttfLdb0
1. Removal of Top Cover
Remove screws a and 0.
Remove screws 6 and 7 .
5, 7a>E/cw~coltfLft
b ~Y7'A/\'--. * b.LA~\'--&CtfLdf.
@@O)+'i&lbfLdb.
5. Removal of Front Panel
Remove the top cover and bottom
a@mlr.~%~$f'ift:/f~~77 9- bh'Cbfhb to
a@-om+'iaisfb1: ~4.r~~-bt~li~11.d~~
@@~+'i&CbfbtV7'@B9-bVlbfhdb,
7, tt7'F5>XOltf Lh
0. @m+'i&Cifbt:Vy b 4:,zAssSy Vlbfhdb.
@OO)+'i%Cif ttV7'b4>~7YCifhbt,
6. Removal of DriveCircuit Board, Buffer Circuit
Board, Sub Power Supply Circuit Board
Remove screw@. The buffer c~rcuitboard can
now be removed.
Remove screws @ - @ . The drive circuit
board can now be removed.
Removescrew @ . The sub power supply circu~t
board can now be removed.
@@m;t.'ifldf .tfC;Y9- 5t)l.1=~bVtZfh2.t.
.@m+'i&ltfelb~h 'I b-9- btFCbfhbt.
8. Removal of Tower Circuit Board, Output Relay
Circuit Board, and Terminal Unit
Removescrew @ . The power circuit board can

.GENERAL ADJUSTMENTS
ADJUSTING POINTS
TPO
TPV-
TPE- TPE.
0 0
DRIVE C.Boord lR1and lL1
IIRR
Step
'
2
3
'2 Pay dueattentiontothedummy load, which must handle high output power.
BBP*
Adjustment
Point
VR30.2
VR303
VR301
VR901
(Lch)
VR902
(R ch)
*I
R B 4i R
Adjustment item
X@mE%@E%%
Voltage adjustment
of regulated power
supply
P-rP1)>Ya;3
=
Idlingcurrent
adjustment
j-s-@,-ga%
Meter sensitivity
adjustment
tx~iti'.f2~
Test Point
TPV(+)-E
TPV(-)-E
TPE(+)-TPO
TPE(-)-TPO
-
To be performed
12s
Equipment
79 9 Jb
* lb I.
3-7-
Digital
Voltmeter
2l)*]bt.
3-7-
Milli-
voltmeter
"El ;&
st^^
Audio signal
Generator
R $55
Procedure
72 I. L0>TPV+C.i~--Z/fL7
(r?> FB~)mt~frfi39rfs
i:?dB& i 1- VR fr%Et6,
Adjust the VR toobtainthe rated
voltage reading between test pin
TPV and chassis ground.
7X I. Y>TPV-CZ/T-LW~~
(Y7> FB-7) m@E&-3R%f&
iCfd6 & i r= VR &-%Ebb,
Adjust the VR toobtain the rated
voltage reading between test pin
TPVand chassis ground.
&r;*Cdl, VR frzL\7lfL\i=
HLTi=jBi&tL, 593b7mr
-9>5fbizR%@i:fd6.k i
i=%!?&66,
First turnthe VR fully counter-
clockwise. Then switch on the
power, wait for at least 5 minutes,
and adjust the VR obtain the rated
reading.
IkHzmW+%&-h%ILf:i%Fm, X
~ttrm (soow/a n, 63.3~)
i=%-9-~7ltS%v 0 dB2 fd6
dr i i:%E?f6,
Adjust the VRs toobtain a meter
indication of0 dBwhen a 1 kHz
signal is applied tothe inputand
the output is at rated power (500
W
/8 ohms, 63.3 V).
after step 1.
gem
Rating
+I 20v
+1V
-1 20v
+Iv
5mV-
7rnV
$9-
0 dB
Meter in-
dication
O dB
tik 4
Renarks
a1 I
cnf%i:
77fd: j
* 1
8x71
ma.
7' 2 -
i: ;it
*2

.PRINTED CIRCUIT BOARD LAYOUT
Meter Meter Lamp.

1 .PRINTED CIRCUIT BOARD LAYOUT
Buffer Drive
Output Relay
Power
Input

TR307, TR320.T
TR324.TR326
2SA970(OR. BLI
-----
SP TERMINAL
o, R Channel Contracted
R Channel Contracted
U
R Channel Contracted
R Channel Contracted
r-' ------------------------------
G Model only
I

I I
I
A B C D
WIRING
G MODEL
' POWER

.CONTENTS
EXPLODED VIEW (ALLOVER)
. . . . . . . ... . . .. . . . 1
PARTS LlST (ALLOVER)
. . . . . . . . . . . . . ... . . . . . 2
EXPLODED VlEW (FRONT PANEL UNIT)
. . . . . .. . . . 3
PARTS LlST (FRONT PANEL UNIT)
. . . . . . .. . ... . . 4
EXPLODED VlEW (MAINCHASSISUNIT) . . . . . . . .. . 5
PARTS LlST (M;~IN CHASSIS UNIT) . . . . . . . . . . . . . . 6
EXPLODED VlEW (POWER UNIT). . . . . .. . . . . . . . . . 7
PARTS LlST (POWER UNIT). . . . .. . . . . . . . .. . . . . . 8
EXPLODED VlEW (TERMINAL UNITIOUTPUT CIRCUIT
BOARD UNITISIDE STAY ASS'Y) . . . . . ........ .
9
PARTS LlST (TERMINALUNITIOUTPUT CIRCUIT
BOARD UNITISIDE STAY ASS'Y)
. . . . . . . . . . . . . 10
EXPLODED VlEW (SUBTRANSFORMER ASS'YI
ELECTROLYTIC CAPACITOR UNIT) . . . . .. . . . . . 11
PARTS LlST (SUBTRANSFORMER ASS1Y/
ELECTROLYTIC CAPACITOR UNIT) . . . . . . . . . . . 12
PARTS LlST (CIRCUITBOARD) . . . . . . . . . . . . . . . .
13
PARTS L
slNcE la- @ YAM AHA
NIPPON GAKKl CO . LTO HAMAMATSU,JAPAN
ST