Yamaha CP-2000 Service manual

SERVICE MANUAL

011553

HAMAMATSU, JAPAN

1.222K-496 Printed in Japan '00.11

CONTENTS

SPECIFICATIONS···································································· 3 PANEL LAYOUT······································································· 4 CIRCUIT BOARD LAYOUT······················································ 5 WIRING····················································································· 6 DIMENTIONS ··········································································· 7 BLOCK DIAGRAM···································································· 8 DISASSEMBLY PROCEDURE················································· 9 IC BLOCK DIAGRAM ····························································· 11 CIRCUIT BOARDS································································· 12 INSPECTIONS········································································ 17 PARTS LIST OVERALL CIRCUIT DIAGRAM

POWER AMPLIFIER

This document is printed on chlorine free (ECF) paper with soy ink.

CP2000

WARNING: CHEMICAL CONTENT NOTICE!

The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and/or plastic (where applicable) components may also contain traces of chemicals found by the California Health and Welfare Agency (and possibly other entities) to cause cancer and/or birth defects or other reproductive harm.

DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REASON WHAT SO EVER!

Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose eyes to solder/flux vapor!

If you come in contact with solder or components located inside the enclosure of this product, wash your hands before handling food.

IMPORTANT NOTICE

This manual has been provided for the use of authorized Yamaha Retailers and their service personnel. It has been assumed that basic service procedures inherent to the industry, and more specifically Yamaha Products, are already known and understood by the users, and have therefore not been restated.

WARNING: Failure to follow appropriate service and safety procedures when servicing this product may result in personal

injury, destruction of expensive components and failure of the product to perform as specified. For these reasons, we advise all Yamaha product owners that all service required should be performed by an authorized Yamaha Retailer or the appointed service representative.

IMPORTANT: This presentation or sale of this manual to any individual or firm does not constitute authorization, certification,

recognition of any applicable technical capabilities, or establish a principal-agent relationship of any form.

The data provided is belived to be accurate and applicable to the unit(s) indicated on the cover. The research engineering, and service departments of Yamaha are continually striving to improve Yamaha products. Modifications are, therefore, inevitable and changes in specification are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist, please contact the distributor's Service Division.

WARNING: Static discharges can destroy expensive components. Discharge any static electricity your body may have

accumulated by grounding yourself to the ground bus in the unit (heavy gauge black wires connect to this bus).

IMPORTANT: Turn the unit OFF during disassembly and parts replacement. Recheck all work before you apply power to the

unit.

WARNING

Components having special characteristics are marked and must be replaced with parts having specification equal to those originally installed.

IMPORTANT NOTICE FOR THE UNITED KINGDOM

Connecting the Plug and Cord

IMPORTANT. The wires in this main lead are coloured in

accordance with the following code:

BLUE: NEUTRAL BROWN: LIVE

As the colours of the wires in the main lead of this apparatus may not correspond with the coloured markings identifying the terminals in your plug, proceed as follows:

The BLUE wire must be connected to the terminal that is marked with the letter N (or coloured BLACK).

The BROWN wire must be connected to the terminal that is marked with the letter L (or coloured RED).

Be certain that neither core is connected to the earth terminal of the three pin plug.

SPECIFICATIONS

CP2000

Power Output Level 8 Ω/STEREO

1 kHz, THD+N=1 %

4 Ω/STEREO

8 Ω/BRIDGE 1 kHz 2 Ω/STEREO 20 ms, non-clip 4 Ω/BRIDGE

Power Bandwidth THD+N=0.2 % (half power) Total Harmonic Distortion (THD+N) 4–8 Ω/STEREO

20 Hz–20 kHz (half power) 8 Ω/BRIDGE

Intermodulation Distortion 4–8 Ω/STEREO

60 Hz:7 kHz, 4:1, half power 8 Ω/BRIDGE

Frequency Response 8 Ω, Po=1W Channel separation Half power, RL=8 Ω

LEVEL=max., input 600 Ω shunt

Residual Noise LEVEL=min., 12.7 kHz LPF, IHF-A network S/N Ratio 12.7 kHz LPF Damping Factor RL=8 Ω, 1 kHz Sensitivity LEVEL=max., rated power into 8 Ω Voltage Gain LEVEL=max. Input Impedance

Front panel

Controls

Rear panel

Input

Connectors

Output

POWER

PROTECTION

TEMP

Indicators

CLIP

SIGNAL

Protection Circuit

Fan Circuit Limiter Circuit

Power requirements

Idle Power Consumption 1/8 Power Consumption (4 Ω) Maximum Power Consumption (4 Ω) Dimensions (W x H x D) Weight AC Power cord length

450 W + 450 W 650 W + 650 W 1300 W 1000 W + 1000 W 2000 W 10 Hz—40 kHz

0.1%

0.1% 0 dB, +0.5 dB, -1 dB f=20 Hz—50 kHz

≥70 dB, 1 kHz ≤ -70 dB

104 dB ≥200 +4 dB

33.8 dB 30 kΩ (balanced), 15 kΩ (unbalanced) POWER switch (push on/push off) LEVEL attenuator (31 position) x2 Mode switch (STEREO/BRIDGE/PARALLEL) YAMAHA SPEAKER PROCESSING switch (ON/OFF) XLR-3-31 type (balanced) L+R 1/4" phone jack (balanced) L+R 1/4" phone jack L+R 5-way binding post x1 x1 (green) x1 (red) x1 (red) heatsink temp ≥85 °C x2 (red) x2 (green) output voltage ≥2 V x2 (yellow) output voltage ≥20 V POWER switch on/off mute DC detection TEMP (heatsink temp ≥90 °C) PC limiter: RL ≤1 Ω Stop–low speed (50 °C)–variable–high Speed (70 °C) Comp: THD≥0.5 % U.S.A. & Canada 120 V AC, 60 Hz Europe 230 V AC, 50 Hz Australia 240 V AC, 50 Hz 30 W 400 W 2000 W 480 x 88 x 416 mm (18.9 x 3.46 x 16.4 inches) 14 kg (30.9 lbs)

2.3 m

* 0 dB=0.775 V rms, half power = 1/2 output level.

9 10 12

2 3 4 5

6 7

POWER switch

POWER indicator

PROTECTION indicator

TEMP indicator

Level controls

CLIP indicators

LEVEL indicators

INPUTs

Mode switch

YAMAHA SPEAKER PROCESSING switch

SPEAKERS connectors

GND terminal

CP2000

PANEL LAYOUT

Front Panel

Rear Panel

CIRCUIT BOARD LAYOUT

CP2000

CN615

CN303 CN305 CN304 CN302

CN616

CN606

CN607

CN608

CN612

CN610 CN609 CN611

CN614

CN313

CN603

CN604

CN605

CN601 CN602

CN301

CN102

CN105

CN106

CN101

CN103

CN104

CN306

CN617

AC 4/6

IN PA

AC 6/6 AC 5/6

AC 1/6

AC 2/6

AC 3/6

Power transformerFront panel Fan

AC 4/6-CN615 IN-CN303 7P 100mm

Connector AssemblyPart No.

MF107100

Location Destination Remarks

AC 6/6-CN617 IN-CN305 9P 120mmMF109120

70 80

3NC2-V617020

1 1

U, V, T H, W, B A

BE BE BR

RE BE BR

• Wire Colors

1 2 3

to Rear panel

AC cord

AC 4/6

AC 6/6

AC 5/6

AC 1/6

AC 2/6

AC 3/6

FAN

KEC-92573

POWER

TRANSFORMER

POWER

switch

CP2000

WIRING

DIMENTIONS

CP2000

480

410

416

Unit: mm

KEC-92572

CHANNEL L (BRIDGE) (PARALLEL)

CHANNEL R

INPUT

JK301

JK303

2 3 1

JK302

JK304

3 1

IC301

POWER

LD602

POWER CIRCUIT

AC Cord

POWER SW

SW601

IC301

SW302

IC302

IC303

VR602

VR601

SW301

ON OFF

CHANNEL

ATT

YAMAHA SPEAKER PROCESSING

SW302

ON OFF

INV

CLIP

LD604

LD605

LD606

JK601

SP601

JK602

LD608

LD609

LD601

SIGNAL

LD603

CLIP

LD607

CHANNEL

ATT

PARALLEL BRIDGE STEREO

Limiter

Lch Power Amp

Limiter

AC 4/6

AC 3/6, 5/6, 6/6

AC 1/6

AC 2/6,

CN615

IC302

CN303

CN302

CN614

-B

+24

-24

Rch Power Amp

Temperature

Sensor

(Heat Sink)

Protection

Circuit

CN304

CN616

PROTECTION

TEMP

W607

CN105

RY101

W609

CN106

RY102

SPEAKERS

CHANNEL L

L+R BRIDGE

CHANNEL R

FAN

Power transformer

CP2000

BLOCK DIAGRAM

(Fig. 1)

(Fig. 2)

(Fig. 3) (Fig. 4)

[420]

[420] [420]

[420]

[420]: Bind Head Tapping Screw-B 4.0X8 MFZN2BL (EG340190)

[290]: Bonding Tapping Screw-B 3.0X8 MFZN2BL (VN413300) [300]: Bind Head Tapping Screw-B 3.0X12 MFZN2BL (VQ074600) [320]: Bind Head Tapping Screw-B 3.0X8 MFZN2BL (EP600190)

[103]: Bind Head Tapping Screw-B 4.0X8 MFZN2BL (EG340190) [140]: Bind Head Tapping Screw-B 3.0X8 MFZN2BL (EP600190)

[80A]: Bind Head Screw A4.0X8 MFZN2BL (VP156800) [120]: Bind Head Tapping Screw-B 3.0X8 MFZN2BL (EP600190) [160]: Bonding Tapping Screw-B 4.0X8 MFZN2BL (VR779900) [180]: Bind Head Tapping Screw-B 3.0X8 MFZN2BL (EP600190)

Top cover

[180][160]

AC 3/6

AC 2/6

[290A] [320] [300] [320]

[A] [B]

[290B]

Speaker terminal cover

[B]

AC 3/6

[80A]

[120]

DB angle

[140][103]

[C]

Transformer holder PA unitPower transformer

DISASSEMBLY PROCEDURE

CP2000

1. Top Cover(time required: about 3 minutes)

1-1 Remove the nine (9) screws marked [420]. The top cover

can then be removed. (Fig. 1)

2. IN Circuit Board(time required: about 8 minutes)

2-1 Remove the top cover. (See procedure 1.) 2-2 Remove the six (6) screws marked [180], the four (4) screws

marked [290A] and the two (2) hexagonal nuts marked [A]. The IN circuit board can then be removed. (Fig. 2, Fig. 3)

3. AC3/6 Circuit Board

(time required: about 10 minutes)

3-1 Remove the top cover. (See procedure 1.) 3-2 Remove the two (2) screws marked [320]. The speaker

terminal cover can then be removed. (Fig. 3)

3-3 Remove the screw marked [290B], the two (2) screws

marked [300] and the two (2) hexagonal nuts marked [B]. The AC3/6 circuit board can then be removed. (Fig. 3)

4. AC2/6 Circuit Board

(time required: about 15 minutes)

4-1 Remove the top cover. (See procedure 1.) 4-2 Remove the AC3/6 circuit board. (See procedure 3.) 4-3 Remove the screw marked [80A], the three (3) screws

marked [120] and the two (2) screws marked [140]. The AC2/6 circuit board and the DB angle can then be removed. (Fig. 2, Fig. 4)

5. Power Transformer

(time required: about 8 minutes)

5-1 Remove the top cover. (See procedure 1.) 5-2 Remove the two (2) screws marked [103] and the

hexagonal bolt marked [C]. The transformer holder and the power transformer can then be removed. (Fig. 2, Fig. 4)

[250]

(Fig. 7)

[250]

Front panel

[250]: Oval Head Screw 4.0X8 MFZN2BL (VS153600)

8. Front Panel (time required: about 5 minutes)

8-1 Remove the top cover. (See procedure 1.) 8-2 Remove the six (6) screws marked [250]. The front panel

can then be removed. (Fig. 7)

AC1/6, A C4/6, AC5/6 and AC6/6 Cir cuit Boar d

(time required: about 20 minutes)

9-1 Remove the top cover. (See procedure 1.) 9-2 Remove the front panel (See procedure 8.) 9-3 AC1/6 Circuit Board:

Pull out the power switch knob. (Fig. 6) Remove the two (2) screws marked [60]. The AC1/6 circuit board can then be removed. (Fig. 6)

9-4 AC4/6 Circuit Board:

Pull out the attenuation knobs. (Fig. 6) Remove the two (2) hexagonal nuts marked [D]. The AC4/6 circuit board can then be removed. (Fig. 6)

9-5 AC5/6 Circuit Board:

Remove the screw marked [100A]. The AC5/6 circuit board can then be removed. (Fig. 6)

9-6 AC6/6 Circuit Board:

Remove the screw marked [100B]. The AC6/6 circuit board can then be removed. (Fig. 6)

• PA Unit

[80B]

(Fig. 5)

Transistor holder (L)

Transistor holder (R)

[40]

[40]: Bind Head Screw SP 3.0X8 MFZN2BL (EG330290) [80B]: Bind Head Tapping Screw-B 3.0X12 MFZN2BL (VQ074600)

(Fig. 6)

[50]: Bind Head Screw 4.0X8 MFZN2BL (EG340360) [60]: Bind Head Screw 3.0X8 MFZN2BL (VB659000) [100]: Bind Head Tapping Screw-B 3.0X8 MFZN2BL (EP600190)

[60] x 2

[D]

[50]

Fan

AC 1/6

AC 4/6

Power switch

knob

Attenuation knob

AC 5/6

AC 6/6

[100A]

[100B]

CP2000

6. PA Unit & PA Circuit Board

(time required: about 15 minutes)

6-1 Remove the top cover. (See procedure 1.) 6-2 Remove the six (6) screws marked [160]. The PA unit can

then be removed. (Fig. 2)

6-3 Remove the eighteen (18) screws marked [80B]. And then

remove the left and right transistor holders from the PA unit. (Fig. 5)

6-4 Remove the six (6) screws marked [40]. And then remove

the PA circuit board from the PA unit. (Fig. 5)

7. DC Fan (time required: about 8 minutes)

7-1 Remove the top cover. (See procedure 1.) 7-2 Remove the PA unit. (See procedure 6-2.) 7-3 Remove the two (2) screws marked [50]. The fan can then

be removed. (Fig. 6)

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