Hitachi CML153, Service Manual

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13
6. VK-526 Control Panel and Audio Board
A. Description
The VK-526 is designed to offer an user interfaced control panel which passes and
receives signals to and from VP-531 power board .Also there is a
stereo audio amplifier
to drive a pair of speakers .When in power saving mode the audio circuit can be turned
off by the control signal from VP-531 board.
B. Electrical characteristics (Tamb=25
°°°°
)
Audio amplifier (Use Panasonic VP-7723A Audio Analyzor).
Item Audio Input Freq. Spec. Comment
Min. Typ. Max.
Input Voltage(V) 11.4 12 12.6
Input Current(mA) 500 800
Audio Voltage Gain 500mVrms 1KHz 10dB
Volume Max., load 8
Ω
Frequency Response 100mVrms 20Hz~20KHz -3dB +3dB Volume Max., load 8 Ω
Signal to Noise ratio 500mVrms 1KHz -60dB Volume Max., load 8 Ω
Cross talk 100mVrms 1KHz -30dB Volume Max., load 8 Ω
Distortion 500mVrms 1KHz 1% Volume Max., load 8 Ω
Output Watt. 500mVrms 1KHz 0.5W Volume Max., load 8 Ω
Volume Control Analog
C. Connector and Switch Locations
D. Connector type
Location Type Maker Number of pins
J1 96113-1113 E&T 11
J2 SCJ-0348-C SC 9
J3 87502-0200 ACES 2
J4 87502-0200 ACES 2
J5 96113-1013 E&T 10