Hitachi CML153 Service Manual - Page 17

VK-526 Control Panel and Audio Board

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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. Min. Typ. Max. Input Voltage(V) 11.4 12 12.6 Input Current(mA) 500 800 Audio Voltage Gain 500mVrms 1KHz 10dB Frequency Response 100mVrms 20Hz~20KHz -3dB +3dB Signal to Noise ratio 500mVrms 1KHz -60dB Cross talk 100mVrms 1KHz -30dB Distortion 500mVrms 1KHz 1% Output Watt. 500mVrms 1KHz 0.5W Volume Control Comment Volume Max., load 8 Ω Volume Max., load 8 Ω Volume Max., load 8 Ω Volume Max., load 8 Ω Volume Max., load 8 Ω Volume Max., load 8 Ω Analog C. Connector and Switch Locations D. Connector type Location Type J1 96113-1113 J2 SCJ-0348-C J3 87502-0200 J4 87502-0200 J5 96113-1013 Maker E&T SC ACES ACES E&T Number of pins 11 9 2 2 10 13

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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