Roland CPM-300 Operating and maintenance manual

1
Apr,1999 CPM-300
TABLE OF CONTENTS Page
SPECIFICATIONS.............................................................................................................................1
LOCATION OF CONTROLS ............................................................................................................. 2
EXPLODED VIEW ............................................................................................................................3
PARTS LIST..................................................................................................................................4~5
TEST MODE .................................................................................................................................6~8
BLOCK DIAGRAM ............................................................................................................................ 9
WIRING DIAGRAM......................................................................................................................... 10
CIRCUIT DIAGRAM..................................................................................................................11~14
CIRCUIT BOARD......................................................................................................................15~19
SPECIFICATIONS
Copyright 

1999 ROLAND CORPORATION
All rights reserved. No part of this publication may be reproduced in any form without the written permisson of
ROLAND CORPORATION.
1. Mixer Section
•Frequency Responce:
20 Hz-20 kHz +1/-2 dB (Sens : min)
•Total Harmonic Distortion:
0.1 % or less (sens : min, 20 Hz-20 kHz, rated output)
•Noise Level:
(Input 150 W terminated, IHF-A Weighted typ.)
Equivalent input Noise Level:
-120 dBm
Residual Noise:
-89 dBm (all fader : min)
-72 dBm (master fader : max)
(all channel fader : min)
-72 dBm (master fader : max)
(all channel fader : nominal)
(all sens : min)
-49 dBm (master fader : max)
(all channel fader : nominal)
(all sens : max)
•Crosstalk:
-70 dB or less (1 kHz between channels)
-60 dB or less (1 kHz between L and R)
•Equalizer:
HIGH EQ: ±15 dB (12 kHz shelving type)
LOW EQ: ±15 dB (80 Hz shelving type)
•Digital Reverb:
Sampling Frequency: 48 kHz
Internal Signal Processing: 24 bits
2. Power Amplifier Section
•Rated Output:
100 W x 2 (Stereo, 8 W load, 1 kHz, 0.1 % or less THD)
150 W x 2 (Stereo, 4 W load,1 kHz, 0.1 % or less THD)
•Recommended Load Impedance:
4 ohms or greater (STEREO)
•Frequency Response:
20 Hz-50 kHz (+0/-1 dB 1W/8 W)
•Total Harmonic Distortion:
0.05 % or less (Stereo, 8 W load, 1 kHz, 50 W)
•S/N Ratio:
100 dB or greater
(amp in 150 W terminated, IHF-A Weighted)
3. Others
•Power:
AC 117/230/240 V (50/60 Hz)
•Power Consumption:
150 W (AC 117/230/240 V)
•Dimensions:
375 (W) x 307 (D) x 131 (H) mm
14-13/16 (W) x 12-1/8 (D) x 5-3/16 (H) inches
•Weight:
6.0 kg / 13 lb 4 oz
•Accessories:
Owner’s Manual (ENGLISH/JAPANESE G6017274)
* 0 dBm = 0.775 Vrms
♦
♦
17059963 Printed in Japan (AA00) (CR)

2
Apr,1999CPM-300
LOCATION OF CONTROLS
23 12
27
13
2524252621
22
75
20
19
5
16
18
17
6141196
5
4
151910
3
2
8
1
6
5
44 21 3
No. PART CODE PART NAME DESCRIPTION
01457190 SEESAW SWITCH SDDJF1003A
01673712 JACK JY-6353-01-130
F3459107 SPEAKER TERMINAL A215C
F2369808 COVER SR-4 230V 240V only
22355334 BASE (FOOT BASE) 235-334
G2817128 BOTTOM CHASSIS
12319402 HANDLE 231-402(H20)
1
2
3
4
5
6
No. PART CODE PART NAME DESCRIPTION
01451789 ROTARY POTENTIOMETER 12M/M EVJ YK5 F03 622
01452467 U R-KNOB M1 LCG BLK
01451801 ROTARY POTENTIOMETER 9M/M EVU F1L FL3 B24
01452489 U R-KNOB M1 LCG GRN
01451812 ROTARY POTENTIOMETER 9M/M EVU F0L FL3 B54
01452478 U R-KNOB M1 LCG RED
01451801 ROTARY POTENTIOMETER 9M/M EVU F1L FL3 B24
01452445 U R-KNOB M1 LCG BLU
01453012 LED LN88RPX
01349423 KNOB U S-KNOB M1 LCG DCG
01563356 SLIDE POTENTIOMETER 45M/M RS45111A6
01451778 ROTARY POTENTIOMETER 12M/M EVJ Y15 F03 B54
01452467 U R-KNOB M1 LCG BLK
01451767 ROTARY POTENTIOMETER 12M/M EVJ Y96 F03 B24
01452489 U R-KNOB M1 LCG GRN
01451778 ROTARY POTENTIOMETER 12M/M EVJ Y15 F03 B54
01452478 U R-KNOB M1 LCG RED
01451734 ROTARY POTENTIOMETER 12M/M EVJ YK6 F03 403
01452445 U R-KNOB M1 LCG BLU
01563367 SLIDE POTENTIOMETER 45M/M RS45112A6
01349423 KNOB U S-KNOB M1 LCG DCG
13129376 SWITCH (PUSH) SPEA12 4POLES
01671723 BUTTON MCG
01451790 ROTARY POTENTIOMETER 12M/M EVU F2L FL3 B24
01452489 U R-KNOB M1 LCG GRN
13129376 SWITCH (PUSH) SPEA12 4POLES
2247064700 BUTTON
13129380 SWITCH SPEA12 NONLOCK
2247064700 BUTTON
01451790 ROTARY POTENTIOMETER 12M/M EVU F2L FL3 B24
01452478 U R-KNOB M1 LCG RED
01451756 ROTARY POTENTIOMETER 12M/M EVJ Y15 F03 B24
01452478 U R-KNOB M1 LCG RED
01451745 ROTARY POTENTIOMETER 12M/M EVJ YL5 F03 A24
01452467 U R-KNOB M1 LCG BLK
01453034 LED LN38GPX
01453023 LED LN48YPX
01453123 CANNON JACK NC3FAV2-0
01349045 JACK JY-6353A-02-250 (remove int tooth washer)
01349045 JACK JY-6353A-02-250
F3449114 JACK JY-6353A-02-130
F3429104 JACK RCA(PIN) JK0200560N
01673712 JACK JY-6353-01-130
G2817129 FRONT PANEL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27

3
Apr,1999 CPM-300
EXPLODED VIEW
NO. PART CODE PART NAME DESCRIPTION
G2817129 FRONT PANEL G2257120 JACK COVER G2247105 DUST COVER 71019478 MIXER ASSY NOTE: Replacement MIXER ASSY includes the JACK BOARD 71019489 EFFECT BOARD F244920601 CHOCK TRANS 230V ONLY G2247103 SHIELD COVER A G2537721 LABEL PS ELECTRIC SHOCK HAZARD G2247104 SHIELD COVER P G2257117 INSULATING SHEET TOP G2467702 HEATSINK G2127103 HANDLE HOLDER 71019490 POWER AMP BOARD NOTE; Replacement POWER AMP board does not include a heat sink and TR holder.
Remove the heat sink and TR holders from the old POWER AMP board. Apply silicone grease on the contacting surface of the heat sink and transistor. Then, attach the heat sink and TR holders onto the new board. The silicone grease is available from the Roland Service Center. (Silicone grease KS-64, P/N 17049573)
00451567 GASKET CHASSIS (S) 01456190 SWTNG REG PS BOARD 100V 01456201 SWTNG REG PS BOARD 117V 01456212 SWTNG REG PS BOARD 230V 01671767 SWTNG REG PS BOARD 240V G2257118 INSULATING SHEET BOTTOM G2817128 BOTTOM CHASSIS 12319402 HANDLE 231-402(H20) 12359137 RUBBER FOOT SJ-5012 01677201 FERRITE-CORE ESD-R-19SD G2207375 TR HOLDER L G2207376 TR HOLDER R G2247401 VR COVER G2537817 LABEL AF EXPALANATIONS F2369808 COVER SR-4 40011201 SCREW M3X8 PAN P-TITE FE BZC 40013056 SCREW M3X6 PAN MACHIN W/SW+SMALL PW ZC 40011056 SCREW M3X6 BINDING B-TIGHT ZC 40010478 SCREW M5X25 OVAL FE BZC (FOR HANDLE) 22155548 BOSS NUT 215-548 40011101 SCREW M3X8 BINDING TAPTITE-B FE BZC 40011089 SCREW M3X14 BINDING HEAD B-TIGHT FE BZC 40011434 SCREW M3X8 PAN SEMS FECM 40011090 SCREW M3X6 BINDING TAPTITE B BZC
1
2
3 4 5 6
7
8
9
10
11
12
13 14 15
16 17 18
19 20
21
22 23
24
25
A
B
C
D
E
F
G
H
I

4
Apr,1999CPM-300
PARTS LIST
CASING
# G2817128 BOTTOM CHASSIS
# G2247105 DUST COVER
# G2247103 SHIELD COVER A
# G2247104 SHIELD COVER P
# G2247401 VR COVER
12359137 FOOT SJ-5012 BLK
22355334 FOOT MKS
12319402 HANDLE H-20
# G2127103 HANDLE HOLDER
# G2817129 FRONT PANEL
CHASSIS
00451567 GASKET CHASIS S
# G2467702 HEATSINK
# G2467109 HEATSINK S L
# G2467108 HEATSINK S R
# G2207375 TR HOLDER L
# G2207376 TR HOLDER R
# G1667101 TR HOLDER
# G2257117 INSULATING SHEET TOP
# G2257118 INSULATING SHEET BOTTOM
12169359 LED SPACER LDS-140G 216-359
KNOB, BUTTON
# 01671723 BUTTON MCG
2247064700 BUTTON 247-647
01349423 U S-KNOB M1 LCG DCG
# 01452445 U R-KNOB M1 LCG BLU
# 01452467 U R-KNOB M1 LCG BLK
# 01452478 U R-KNOB M1 LCG RED
# 01452489 U R-KNOB M1 LCG GRN
SWITCH
# 01453045 PUSH SWITCH SPEA41 SW2 on MIX
# 01457190 SEESAW SWITCH SDDJF1003A
13129376 PUSH SWITCH SPEA12 4 circuit SW1 on MIX
13129380 PUSH SWITCH SPEA12 2 circuit non-lock SW3 on MIX
JACK, SOCKET
# F3429104 RCA(PIN) JK0200560N RCA(PIN) JK0200560N JK903,JK2 on MIX
# 01453123 NC3FAV2-0 CANNON JK102 on MIX
# F3449114 JY-6353A-02-130 JACK JK3-6 on MIX / JK2001,2002 on SJB
# 01349045 JY-6353A-02-250 JACK JK1, 101 on MIX
# 01673712 JY-6353-01-130 JACK JK7-9,701,702,901,902,201,301,401,501,601 on MIX
POWER SUPPLY UNIT
# 01456190 SWTNG REG PS BOARD 100V
# 01456201 SWTNG REG PS BOARD 117V
# 01456212 SWTNG REG PS BOARD 230V
# 01671767 SWTNG REG PS BOARD 240V
# F244920601 CHOCK TRANS 230V ONLY
PWB ASSY
# 71019489 EFFECT BOARD
# 71019478 MIXER ASSY
NOTE: Replacement MIXER ASSY includes the JACK BOARD
# 71019490 POWER AMP BOARD
NOTE: Replacement POWER AMP board does not include a heat sink and TR holder.
Remove the heat sink and TR holders from the old POWER AMP board.
Apply silicone grease on the contacting surface of the heat sink and transistor. Then, attach the heat sink and TR holders onto the new board.
The silicone grease is available from the Roland Service Center.
(Silicone grease KS-64, P/N 17049573)
IC
# 01453078 HD6433041F MASK V1.00 CPU MASK
01236401 TMS57070FFT DSP
01126778 24LC01BT-I/SN EEPROM IC1 on EB
# 01457134 NN514260-50(P40SJ-2B) DRAM IC5 on EB
01126767 UDA1309H AD/DA IC16, 18 on EB"
00127490 TC7W08F(TE12L) IC9 on EB
00232634 TC7W74F(TE12L) IC8 on EB
15249111 TC7WU04F(TE12L) IC6 on EB
01125012 NJM4556AM OP AMP IC3 on MIX
# 01453056 UPC1099GS DC/DC CONVERTER IC7, 10 on PAB
15289105 UPC4570G2-E2 OP AMP IC6,8,9,11 on PAB/IC1,2,4-8,101,102,201,301,302,401,501,502,
601,701-703,901-903 on MIX/IC21,17 on EB
01344056 SI-8501L REGULATOR IC3 on PAB
15199209 NJM7815FA
15199208 NJM7915FA
15199245J0 NJM7812FA
15289402 TA78L05F REGULATOR IC15 on EB
15219188 BA683A LED DRIVER IC9,10 on MIX
15289123 M51953AFP-600C RESET IC IC10 on EB
# 01670178 P873-G35-552 PHOTO CUPLR IC12,13 on PAB
TRANSISTOR
01239990 2SC4117-GR TRANSISTOR Q18,59,60,64,65,67,74,82,83,88,92,99 on PAB
# 01452978 2SK2289-4100 TRANSISTOR PW MOSFET Q85, 56 on PAB
# 01452989 2SK2279-4061 TRANSISTOR PW MOSFET Q47, 52 on PAB
# 01452990 2SJ365-4061 TRANSISTOR PW MOSFET Q43, 48 on PAB
# 01453001 2SJ376-4100 TRANSISTOR PW MOSFET Q62, 45 on PAB
# 01455889 2SA1145-Y TRANSISTOR Q3,76 on PAB
# 01455890 2SC2705-Y TRANSISTOR Q11,80 on PAB
# 01457112 2SB1236ATV2P TRANSISTOR Q46,51 on PAB
# 01457123 2SD1857ATV2P TRANSISTOR Q49,44 on PAB
15119156 2SA1358-Y TRANSISTOR Q12,37 on PAB
15119715 2SA1673-P -15A/-180V/85W TRANSISTOR Q13,38 on PAB
15129421 2SC3421-Y TRANSISTOR Q1,7,26,79 on PAB
15129623 2SD667CTZ TRANSISTOR Q23 on PAB
15129723 2SC4388-P 15A/180V/85W TRANSISTOR Q2,27 on PAB
15309104 2SA1586-GR TRANSISTOR Q10,22,24,35,41,54,89,91 on PAB/C101,201,301,401,501,601,
701,901,1101 on MIX
# 15309105 2SA1587-GR(TE85L) TRANSISTOR Q9,57,58,61,63,68,71,72,75,77,78,84,86 on PAB
15319101 2SC2412KR T146 TRANSISTOR Q5,6 on EB
15319102 2SC2882-Y(TE12L,C) TRANSISTOR Q2 on EB
15319105 2SC3326-A TRANSISTOR Q1-3,51-53,81 on MIX
15319107 2SC4116-GR TRANSISTOR Q4,14,16,20,21,25,29,39,40,53,90 on PAB / Q102,202,302,402,
502,602,702,902,1102,1103 on MIX
15329516 DTC114EKT146 TRANSISTOR Q82 on MIX
DIODE
# 00129767 RD10M-T1B B2 ZENER DIODE D68,77 on PAB
01121323 DA204U ARRAY DIODE DA1, 2, 5 on EB
01122334 MTZJ T-77 20B ZENER DIODE D3001-D3010 on PAB
# 01452967 ESAC83M-006(20A) SCHOTTKY DIODE DA5, 6 on PAB
# 01563801 RD20MB ZENER DIODE D8 on PAB
# 01565667 RD9.1FM B ZENER DIODE D29,31,33,36 on PAB
# 01565678 RD5.1M-T2B ZENER DIODE D66,71,75,79 on PAB
15039142 S5688G(TPB5) RECTIFIER DIODE D15,50 on PAB
15339105 DAN202K ARRAY DIODE DA101,102,201,202,301,302,401,402,501,502,601,602,701-703,
901-903 on MIX
15339108 DA204K ARRAY DIODE DA1,2,4,7 on PAB
15339314 RD16M-T1BB2 ZENER DIODE CHIP D20,21,44,45 on PAB
15339320 RD6.8M-T2B ZENER DIODE CHIP TAPE D63,81,83,87 on PAB
# 15339324 RD2.0M-T1BB1 ZENER DIODE D58,61 on PAB
15339119T0 1SS352 D1,4,6,7,9,12-14,16-18,25-28,30,32,39-43,46-49,51-54,57,62,
64-70,72-74,76,78,80,82,88-93 on PAB
# 01453012 LN88RPX LED LED1,13,25,26,101,201,301,401,501,601,701,901on MIX
# 01453023 LN48YPX LED LED2-4,14-16 on MIX
# 01453034 LN38GPX LED LED5-12,17-24,27 on MIX
SAFETY PRECAUTIONS:
The parts marked have
safety-related characteristics.
Use only listed parts for
replacement.
SAFETY PRECAUTIONS:
The parts marked have safety-related characteristics. Use only listed parts for replacement.
QTY PART NUMBER DESCRIPTION MODEL NUMBER
Ex. 10 22575241 Sharp Key C-20/50
15 2247017300 Knob (orange) DAC-15D
Failure to completely fill the above items with correct number and description will result in delayed or
even undelivered replacement.
NOTE: The parts marked # are new. (initial parts)
PAB →POWER AMP ASSY EB →EFFECT BOARD MIX →MIXER ASSY
E

5
Apr,1999 CPM-300
RESISTOR
# 01230201 RSS2 L15 10 OHM J MTL.OXIDE RESISTOR R11,19, 80, 88 on PAB
# 01561745 MCR25 JZH J 0R0 MTL.FILM RESISTOR RJ1-4, 6-15, 20
# 01563956 MCR50 JZH J 331 MTL.FILM RESISTOR R135,146,151,188,196,206 on PAB
# 01565556 BPR58F 0.47 OHM K MTL.PLATE RESISTOR R9,10,22,23,78,79,91,92,162,176 on PAB
# 01565623 RF25S 47 OHM J FUSE RESISTOR R254,264,318,342 on PAB
# 01565634 RF25S 4.7 OHM J FUSE RESISTOR R256,263,321,338 on PAB
# 01565645 RF25S 330 OHM J FUSE RESISTOR R259,328 on PAB
# 01565656 RF25S 820 OHM J FUSE RESISTOR R257,261,262,323,325,335,336,344 on PAB
# 01670167 RSS2 L15 100 OHM J MTL.OXIDE RESISTOR R310,315,349,350 on PAB
# 01673890 RF25S 18 OHM J FUSE RESISTOR R266 on PAB
15229936 PTH9M04BC471TS2F333 POSISTOR R68 on PAB
# 15399916 1/2W MCR50-181J CHIP RESISTOR R356, 357 on PAB
15399926 MCR50-101J CHIP RESISTOR R71, 21 on MIX
15399952 1/2W MCR50JZH470 CHIP RESISTOR R44 on EB
00346690 RPCE9A682JAG7A R-ARRAY RA5, 7 on EB
15399957 RPCB8C103J5 10KX4 R-ARRAY RA1, 8, 9 on EB
15399965 RPCE9A103JAG7A R-ARRAY RA3, 4 on EB
15399997 RPCB8C101J5 100X4 R-ARRAY RA14, 13 on EB
15399349 RPC10T 100 J 1/10W MTL. FILM RESISTOR
15399411 RPC10T 392 J 1/10W MTL. FILM RESISTOR
15399419 RPC10T 822 J 8.2K OHM 1/10W MTL. FILM RESISTOR
15399445 RPC10T 104 J 1/10W MTL. FILM RESISTOR
15399417 RPC10T 682 J 1/10W MTL. FILM RESISTOR
15399413 RPC10T 472 J 1/10W MTL. FILM RESISTOR
15399463 RPC10T 564 J 560K 1/10W RESISTOR MTL. FILM
15359436R0 GRM40B102K50PT10 1000PF/50V CERAMIC CAPACITOR
15399383 RPC10T 270 J RESISTOR
15399385 RPC10T 331 J 1/10W MTL. FILM RESISTOR
POTENTIOMETER
# 01451734 EVJ YK6 F03 403 ROTARY POT. VR705, 905 on MIX
# 01451745 EVJ YL5 F03 A24 ROTARY POT. VR3 on MIX
# 01451756 EVJ Y15 F03 B24 ROTARY POT. VR5 on MIX
# 01451767 EVJ Y96 F03 B24 ROTARY POT. VR702, 703, 902, 903 on MIX
# 01451778 EVJ Y15 F03 B54 ROTARY POT. VR701, 704, 901, 904 on MIX
# 01451789 EVJ YK5 F03 622 ROTARY POT. VR101, 201, 301, 401, 501, 601 on MIX
# 01451790 EVU F2L FL3 B24 ROTARY POT. VR4, 6, 7 on MIX
# 01451801 EVU F1L FL3 B24 ROTARY POT. VR102,103,105,202,203,205,302,303,305, 402, 403, 405, 502,
503, 505, 602, 603, 605 on MIX
# 01451812 EVU F0L FL3 B54 ROTARY POT. VR104, 204, 304, 404, 504, 604 on MIX
# 01563356 RS45111A6 SLIDE POT. VR1,2,106,206,306,406,506,606 on MIX
# 01563367 RS45112A6 SLIDE POT. VR706,906 on MIX
# 01565212 RH063MCS3R (4.7K B) TRIMMER VR5, 6 on PAB
13299251 RH063MCS2R (470 B) TRIMMER VR1,7 on PAB
CAPACITOR
# 01563701 GRM40CH220J200 CERAMIC CAPACITOR C4,18,139,148 on PAB
# 01563712 ECQV1H105JL3 POLYEST. CAPACITOR C10,34 on PAB
# 01563734 ECA1JHG102E CHEMICAL CAPACITOR C49,133 on PAB
# 01563767 ECQV1J104JM3 POLYEST. CAPACITOR C121,128,130,137 on PAB
# 01563778 DE509-979R332K250 CERAMIC CAPACITOR C160,161,164,165 on PAB
# 01563789 ECQE1335KF POLYEST. CAPACITOR C162,163 on PAB
# 01564045 ECA1JHG471E CHEMICAL CAPACITOR C136,129 on PAB
# 01678289 GRM40CH100D200PT CERAMIC CAPACITOR C9,146 on PAB
# 13649102M0 ECEA1HN100SB CHEMICAL-BP CAPACITOR C23, 47 on PAB
13649103M0 ECEA1CN100SB CHEMICAL-BP CAPACITOR C22, 46 on PAB
INDUCTOR, COIL, FILTER
00452167 0.7 micro H COIL L1, 2 on PAB
# 01455912 OH14-865-073 CHOKE COIL L11,13 on PAB
# F2449206 45 micro H CHOCK COIL For 230V Only
00907856 FERRITE-BEAD BLM21A601SPT
01340834 FERRITE-BEAD EXCML20A390 L3-8 on PAB / L3, 53 on MIX
01565578 FERRITE-BEAD N1608Z601T01 L81,82,83,101,190,201,301,401,501,601,701,721,901,921,990,
991 on MIX
# 01677201 FERRITE-CORE ESD-R-19SD
12449347 FERRITE-BEAD EXC ELDR35V L9,10,12,14-16 on PAB
CRYSTAL, RESONATOR
00901912 MA-406 24.576MHZ TE24 CRYSTAL X1 on EB
RELAY
# 01565545 JY1AJN-DC24V RELAY RL1,2 on PAB
CONNECTOR
13369586 B3P-VH JST CONNECTOR CN11 on PAB
13369924 53253-0210 WAFER CN3,9 on PAB
13369925 53253-0310 WAFER CN7,15 on PAB
13369928 53253-0610 WAFER CN13,16 on PAB
13369929 53253-0710 WAFER CN12 on PAB
13369930 53253-0810 WAFER CN4 on PAB, CN10 on MIX
13369931 53253-0910 WAFER
13369934 53253-1210 WAFER CN3 on MIX
13369940 53254-0410 WAFER CN1 on EB / CN1 on MIX
13369943 53254-0710 WAFER CN5 on EB
13369944 53254-0810 WAFER CN8 on EB / CN2 on MIX
1336994853254-1210 WAFERCN3 on EB
WIRING
# 01564945 SRA-200E WIRING 12
# 01564956 SRA-200E WIRING 13
# 01564967 SRA-200E WIRING 14
# G3417149 WIRING 01
# G3417150 WIRING 02
# G3417151 WIRING 03
# G3417152 WIRING 04
# G3417153 WIRING 05
# G3417154 WIRING 06
# G3417155 WIRING 07
# G3417156 WIRING 08
# G3487407 WIRING 09
# G3487408 WIRING 10
# G3487409 WIRING 11
# G3487410 WIRING 12
# G3487411 WIRING 13
# G3487412 WIRING 14
AC CORD ASSY
# 71D193A100 AC CORD ASSY 100V
# 71D193A200 AC CORD ASSY 117V
# 71D193A400 AC CORD ASSY 230V
# 71D193A500 AC CORD ASSY 230VE
# 71D193A600 AC CORD ASSY 240VA
SCREW
40010478 OVAL MACHINE SCREW M5x25 BZC
40011056 BINDING TAPTITE B 3x6 ZC
40011067 BINDING TAPTITE B 3x8 ZC
40011089 BINDING TAPTITE B 3x14 ZC
40011090 BINDING TAPTITE B 3x6 BZC
40011101 BINDING TAPTITE B 3x8 BZC
40011201 PAN TAPTITE P 3x8 BZC
40011434 PAN MACHINE SCREW W/SW M3x8 ZC
40013056 PAN MACHINE SCREW W/SW+SMALL PW M3x6 ZC
22155548 BOSS NUT M3/M3 L25
40016689 JACK NUT #704 BLACK
40123545 JACK NUT HLJ0999-01-240
40011778 CONICAL SPRING NUT M3 ZC
40019956 SPRING NUT M4
40016412 JACK WASHER 9x13.5x0.45
40016690 COLOR WASHER #19 GREEN
40129956 PLAIN WASHER 4x10x0.8 ZC
PACKING
G2617149 PACKING CASE
# G2237602 PAD L
# G2237603 PAD R
MISCELLANEOUS
13459171 CHECKER CHIP RCS00000C TP2,3 on PAB
# 40341023 CHECK-POINT ST-4-2 TP1, 4 on PAB
G2537721 LABEL PS ELECTRIC SHOCK HAZARD
G2537817 LABEL AF ’EXPALANATIONS
# F3459107 SPEAKER TERMINAL
12199584 GROUNDING TERMINAL M1698
# F2369808 COVER SR-4 (230V 240V only)
# G2257120 JACK COVER
ACCESSORIES (STANDARD)
# G6017274 OWNER’S MANUAL ENGLISH/JAPANESE

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Apr,1999CPM-300
TEST MODE
Figure 1
Fig. 2 SP OUTPUT: 28.3 Vrms, 1 kHz`
Fig. 3 SP OUTPUT: 28.3 Vrms, 4 kHz
Fig. 4 SP OUTPUT: 28.3 Vrms, 6 kHz
CPM-300 Adjustment
Checking operation of high-efficiency power amplifiers
The CPM-300 has high-efficiency power amplifiers fabricated
through the ECOS technology.
This section explains how to check and adjust these high-effi-
ciency amplifiers.
Carry out the checking/adjusting procedure described below
whenever the power amp board has been repaired or
replaced.
Adjusting ±Va
1. Setup
INPUTS- - - - - - - - - - - - - No signal
SPEAKERS - - - - - - - - - - Open
MASTER FADERs - - - - - MIN.
The Effect board can be left removed for the purpose of
adjustment because it is not involved in the adjustment.
2. Adjustment
Connect the probes of a dual channel oscilloscope across the
following points:
Power amp board
+Va: EMI bead L12 and GND
-Va : EMI bead L14 and GND
Adjust VR5 for +Va and VR6 for -Va so that +7 V and -7 V are
obtained, respectively, between the trough of the waveforms
and ground reference (DC components).
(See Figure 1.)
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Make the exact adjustment. If a voltage is out of spec, it
causes undesirable amp operation:
A higher Va causes the power transistor to generate more
heat, decreasing the efficiency.
A lower Va causes the power transistor to distort the signal.
±Va waveform specifications
1. Setup
INPUTs - - - - - - - - - - - - - Connect CH 1 (INPUT 1) to an
audio generator
HIGHs, LOWs - - - - - - - - Flat
SENDs - - - - - - - - - - - - - MIN
PANs - - - - - - - - - - - - - - - Center
SPEAKERS- - - - - - - - - - - Into 8-ohm loads, LEFT and RIGHT
SENS’s, FADERs, MASTER FADERs
- - - - - - - - - - - - - - - - - - - Adjust as described in the step 2
below.
The Effect board can be left removed for the purpose of
adjustment because it is not involved in the adjustment.
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2. Monitoring waveforms
Connect the probes from the oscilloscope across the points.
Adjust the frequency and output level (sine wave) of the audio
generator and the panel controls SENS’s, FADERs and MAS-
TER FADERs so that the output shown in Figs. 2-5 are
obtained.
Check the +Va and -Va displayed on the scope against the
figures shown in Figs. 2-5.
Power amp board
+Va: EMI bead L12 and GND
-Va : EMI bead L14 and GND
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Apr,1999 CPM-300
Fig. 5 SP OUTPUT: 20.0 Vrms, 6 kHz
Adjusting voltage during idling
C
AUTION: If the temperature of the heat sink is higher than
30°C, wait until the heat sink becomes cool.
1. Setup
INPUTs - - - - - - - - - - - - - No signal
SPEAKERS - - - - - - - - - - Open
MASTER FADERs - - - - - MIN.
The Effect board can be left removed for the purpose of
adjustment because it is not involved in the adjustment.
2
. Adjustment
For this measurement, connect a voltmeter (digital voltmeter
is recommended) across the following points.
Using trial-and-error method, adjust VR1 (CH A) and VR7
(CH B) so that the voltage across the test points reaches +5
mVDC±2mV upon power-up.
Power amp board
CH A: TP1(+) and R11 lead (TP1 side) (common)
CH B: TP4(+) and R80 lead (TP1 side) (common)
Make the exact adjustment. If a voltage is out of spec, it
causes undesirable effects:
A lower idling voltage increases the total harmonic distor-
tion factor.
A higher idling voltage causes the transistor to generate
more heat, which in turn increases the temperature of the
heat sink.
Circuit description of power amp board
1. Protection circuits
The protection circuit, when activated by the following circuit,
turns off output relays RL1 and RL2, shutting off the outputs.
Thermal protection circuit (for amps)
The thermal sensor R68 activates the protection circuit as it
detects a temperature of 100°C or higher on the heat sink.
The sensor deactivates the circuit when the temperature
drops to 90°C and below.
DC sensing circuit (for speakers)
This circuit monitors the DC components in the output to
SPEAKERS. When a power output contains DC components
of ±5.5 V or higher, the circuit activates the protection circuit.
To check the sensitivity of the circuit, apply a voltage between
+3 V and +3.5 V to the test point of CH A/B shown below,and
a voltage between -3V and -3.5V to CH A/B. The protection
circuit should be triggered.
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• Power amp board
CH A test point: TP2 and GND
CH B test point: TP3 and GND
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Muting circuit (for speakers)
Triggers the protection circuit for approx. 5 seconds upon
power up to suppress pop noises.
2. PC limit circuit (for amps)
The PC limit circuit reduces the output when overloaded or
the load is to small (below 2Ω).
3. Limiter circuit
Upon detecting clipped waveform from a power amp, the cir-
cuit reduces the maximum level of the input signal to the
power amp: limits the nominal input level range within approx.
+12 dB at 1 kHz.
DSP test mode
test items
1. Version identification and LED
2. Volume
3. Switches
4. Diagnosis
EEPROM,DSP
5. Level balance
Upon successful completion of this test, the unit returns to the
normal operation mode.
6. Anti-feedback
This test is performed in the normal operation mode.
Preparation
0. Entering the test mode
Select DIGITAL REVERB, ROOM. Set TIME to MAX and
LEVEL to MIN. While holding down the AUTO SET, turn on
power.
1. Version identification and LED test
Once in the test mode, the AUTO SET LED lights for 2 sec-
onds. Then, the LED blinks to represent the version number in
three digits (1-digit major version and 2-digit minor version).
The on-duration and interval between blinks depend on the
number to be expressed, as shown below.
0 : turns on for 0.5 sec.
1-9 : blinks at a 0.12 sec. interval, the number of blinks is
equivalent of the number to express.
Example: Ver. 1.20 - turns on for 0.5 s, blinks twice and then
turns on for 0.5 s. Then, the test program proceeds
to the test 2.
2. Volume
The AUTO SET LED turns on indicating the initiation of the
test 2.
Set the TIME to MIN and the LEVEL to MAX. The AUTO SET
LED turns off and the program proceeds to the test 3.
3. Switches
Press ECHO and verify the lighting AUTO SET LED. In the
similar way, press the HALL, STAGE and ROOM in that order
and verify the lighting LED upon pressing. The program pro-
ceeds to the test 4.
4. Diagnosis
During the self-diagnostics sequence the AUTO SET LED
lights. While the LED is lighting, any other operation is not
accepted.
4.1. EEPROM
When the test is successful, the program turns pro-
ceeds to the test 4.2.
If the test fails, the program lights the LED 3 times and
won’t proceed to the test 4.2.
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Apr,1999CPM-300
4.2. DSP
When the test is successful, the program turns off the
LED and proceeds to the test 5. If the test fails, the pro-
gram lights the LED 4 times and won’t proceed to the
test 5.
To force the test program to proceed to the test 5, press
and hold AUTO SET until the test continues.
5. Level balance
Connect the audio generator to any of channels 1 to 6 and set
the audio generator to the value shown below.
Waveform :Sine
Output level :as appropriate
Input Level :+4dB
Frequency :1 kHz
Set the CPM-300 as follows (controls on a channel are for the
channel carrying the test signal):
Channel controls
SENS : +4 dBm (full-counterclockwise)
HIGH : Center
LOW : Center
SEND : Center
PAN : Center
FADER:At "0" on the scale
Master controls
SEND : 0 (full-clockwise)
FADER : At "0" on the scale
Connect oscilloscope input to MIXER OUT: L and R
This is to keep a level balance between DSP board output
and THRU output.
While repeatedly pressing ANTI FEEDBACK ON/OFF switch,
turn TIME knob which should vary the channel L output wave-
forms on the scope gradually. Adjust TIME knob until the
waveform on the scope is maintained almost at the same
upon ON and OFF of ANTI FEEDBACK switch. During this
adjustment, AUTO SET LED blinks at a slower rate.
Repeat the procedure for the R channel but this time adjust
LEVEL knob.
Press AUTO SET to save the settings into memory. The pro-
gram proceeds to the test 6.
6. Anti-feedback
Connect the audio generator to any of channels 1 to 6 and set
the audio generator to the value shown below.
Waveform : Sine
Output level : As specified in a step
Frequency : As specified in a step
Set the CPM-300 as follows (controls on a channel are for the
channel carrying the test signal):
Channel controls
SENS : +4 dBm (full-counterclockwise)
HIGH : Center
LOW : Center
SEND : Full-counterclockwise
PAN : Center
FADER : At "0" on the scale
Master controls
SEND : Full-counterclockwise
FADER : At "0" on the scale
Connect oscilloscope input to: MIXER OUT L and R
Apply the following steps to the L channel and repeat for the
R channel.
6.1 Set the audio generator to the values shown below.
Output level : +4 dBm
Frequency : 100 Hz
Press ANTI FEEDBACK switch to ON and verify smooth
fading of the output.
6.2 Set the audio generator to the values shown below.
Output level : +4 dBm
Frequency : 1 kHz
Press ANTI FEEDBACK switch to ON and verify smooth
fading of the output.
6.3 Set the audio generator to the values shown below.
Output level : +4 dBm
Frequency : 10 kHz
Press ANTI FEEDBACK switch to ON and verify smooth
fading of the output.

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Apr,1999 CPM-300
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BLOCK DIAGRAM

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WIRING DIAGRAM

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CIRCUIT DIAGRAM
MIXER BOARD ASSY (71019478)
MIXER SHEET SCHEMATIC 2-1 SIGNAL SECTION

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MIXER SHEET SCHEMATIC 2-2 CONTROL SECTION

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POWER AMP BOARD ASSY (71019490)

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Apr,1999CPM-300
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DSP BOARD ASSY

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Apr,1999 CPM-300
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CICUIT BOARD
EFFECT BOARD (71019489)
View from component side. View from foil side.

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Apr,1999CPM-300
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MIXSER BOARD ASSY (71019478) /JACK BOARD ASSY
JACK BOARD ASSY
MIXER BOARD ASSY
(71019478)
View from component side.

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MIXSER BOARD ASSY (71019478) /JACK BOARD ASSY
JACK BOARD ASSY
MIXER BOARD ASSY
(71019478)
View from foil side.

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POWER AMP BOARD (71019490)
View from component side.

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POWER AMP BOARD (71019490)
View from foil side.