Manual Marshall JCM 900 - 4100 (page 32 of 40) (English, German, French, Spanish)

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1. 回路电平

调整效果回路的电平，范围从 -10dBV

至 + 4dBu。高设置适合现代效果处理器，

低设置适合地面效果踏板。注：某些效

果器，例如失真和压缩效果器，最好通

过前面板的输入插孔来连接，因为这样

效果会更好。

2. 发送

与外部效果器的输入接口连接。

3. 返回

与外部效果器的输出接口连接。

4. 录音补偿线路输出接口

通过此插孔与录音设备或扩音系统直接

相连。信号经过特殊滤波处理，可输出

最佳的录音品质。

5. 直线输出接口

与外部功率放大器相连的插孔，前置放

大器信号未经任何滤波处理。

6. 阻抗选择器

使放大器与扬声器阻抗相匹配的双向开

关。

7. 扬声器

连接扬声器箱体的并联有线插孔。请确

保扬声器有足够的能力支持放大器的全

功率运行，并且选择了正确的阻抗（上

面第 6 项）。如有任何疑问，请向您的

Marshall 经销商咨询。

8. 模式

将放大器从高输出功率切换到低输出功

率。调到低功率位置时，输出级运行在

“三极管”模式，此时输出功率为额定值

的一半，即 50W。调到高功率位置时，

放大器运行在“五极管”模式，此时输

出功率为全功率额定值 100W。注：从

100W 切换到 50W 不会将放大器的音量

降低一半。此功能的作用是改变放大器

的音色特性和弹奏感觉。

后面板功能

9、10. 电子管故障 LED 指示灯 (OPV1-4)

和电子管保险丝 (OPV1-4)

当输出电子管发生故障时，保险丝（第

10 项）开始工作，故障 LED 指示灯（第

9 项）发亮。此保险丝适用于输出电子

管 1 和 4。放大器将降低功率继续运行

（仅适用于电子管 2 和 3）。此时应尽快

进行维修，以免输出电子管 2 和 3 过早

老化。

11、12. 电子管故障 LED 指示灯 (OPV2-3)

和电子管保险丝 (OPV2-3)

与上面第 9 项和第 10 项的功能类似，但

适用于输出电子管 2 和 3。

13. 电源输入

将放大器连接到电源。注：务必确保输

入电压与放大器的电压相匹配。如有任

何疑问，请向您的 Marshall 经销商咨询。

14. 电源保险丝

发生故障时保护放大器和电源。注：务

必确保保险丝的数值与放大器后面板上

标示的数值相匹配。如有任何疑问，请

向您的 Marshall 经销商咨询。

后面板功能（续）

MAINS INPUT FUSE

120V ~ 60Hz

375 Watts

EFFECTS

SEND

HIGH LOW

LOOP

LEVEL

RETURN RECORDING

COMPENSATED

DIRECT

(4)16 8

HIGH LOW

FAIL

OPV-1-4 OPV-2-3

DO NOT USE WITHOUT

CONNECTING SPEAKER LOAD

SEE MANUAL FOR CORRECT

OPERATION AND RATING

T500mA T500mA

220/240V - T2A

110/120V - T4A

FAIL

LINE OUTPUT POWER

LEVEL OUTPUT

OUTPUT

VALVE FUSE

WARNING!:

SHOCK HAZARD. DO NOT OPEN.

TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS EQUIPMENT TO

RAIN OR MOISTURE. THIS APPARATUS MUST BE EARTHED.

AVIS!:

RISQUE DE CHOC ELECTRIQUE. NE PAS OUVRIR. POUR EVITER LES RISQUES

D’INCENDIE ET DE DECHARGES ELECTRIQUES, N’EXPOSEZ JAMAIS CET APPAREIL A L’HUMIDITE

OU A LA PLUIE. CONNECTER CET APPAREIL A LA TERRE.

CAUTION!:

TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER.

NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

ATTENTION!:

POUR EVITER LES RISQUES DE DECHARGES ELECTRIQUES, NE PAS

OUVRIR LE COUVERCLE. CET APPAREIL NE COMPORTE AUCUNE PIECE SUSCEPTIBLE D’ETRE

REPAREE PAR VOS SOINS. FAITES TOUJOURS APPEL A UN TECHNICIEN QUALIFIE POUR TOUTE

REPARATION.

OUTPUT :

100 WATTS RMS INTO 8Ω

Made in England by

Marshall Amplification plc,

Bletchley, Milton Keynes, England.

IMPEDANCE

SELECT

MODE

LOUDSPEAKERS

100W

R.M.S.

WARNING:

DO NOT OBSTRUCT VENTILATION GRILLES

ATTENTION:

NE PAS OBSTRUER LES GRILLES DE VENTILA

TION

3 4. 5. 6. 7.

8. 10.9. 12.11. 13. 14.

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Marshall JCM 900 - 4100 Manual

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