Panasonic VL-GM201RU Service Manual ▷ View online
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12.1.2. MAIN BOARD(PFUP1475ZA)
4bit MicroComputer(IC200)
Operating Power Supply : +5V
Package : 42pin Plastic shrink SOP
Internal Component : ROM(4096x8bit), RAM(512x4bit), Low Voltage A/D converter(8bit x 8channels),serial interface(1ch)
Outline of Operation : VL-GM201 system control and Call Signal from the Door Station is received and sent to speaker.
System Clock Frequency : 4MHz(X201) .
EEPROM(IC411) is accessed by serial interface.
EEPROM(IC411)
Operating Power Supply : +3.3V
Package : 8pin SSOP-B8
Capacity : 64x16bit
Outline of Operation : Stores LCD adjustment values.
Voice switched speaker-phone IC(IC501)
Operating Power Supply : +5V
Package : 28pin SOP28
Internal Component : Microphone amplifier with adjustable gain and mute control, Tx and Rx attenuators,level detectors,
background noise monitors, dial tone detector.
background noise monitors, dial tone detector.
Outline of Operation : The signal from microphone is detected by level detectors and amplified or muted.
Speaker Amplifier IC(IC302)
Operating Power Supply : +12V
Package : DMP8
Outline of Operation : The signal to Speaker is amplified.
Video signal demodulator (IC601)
Operating Power Supply : +5V
Package : 48pin plastic QFP
Outline of Operation : The Video signal(FM) from the Door Station is demodulated.
LCD Controller(IC405)
Operating Power Supply : +3.3V(VCC3:33pin), +5V(VCC1:6pin), +12V(VCC2:13pin)
Package : 64pin QFP
Internal Component : RGB decoder, LCD driver, Timing generator for LCD panel driving, Serial I/F circuit, D/A converter for
electric volume.
electric volume.
Clock Frequency : 3.579545MHz(X401)
Outline of Operation : It let the LCD display the video signal from Door Station.
Volume control SW(SW301)
Outline of Operation : It adjusts volume to three stages.
Answer Mode control SW(SW203)
Outline of Operation : It changes the answer mode to the following three modes.
1. AUTO : When a visitor calls you, you can answer the call by voice
2. .PUSH : When a visitor calls you, you can answer the call by pressing [TALK button]. You may then speak with the caller.
3. .HOLD : When a visitor calls you, you can answer the call by pressing [TALK button]. Press {TALK} while speaking to the
caller and release the button to allow the caller to speak to you.
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Monitor SW(SW201)
Outline of Operation : Allows you to monitor the sound and camera image from the door station.
Bright SW(SW503)
Outline of Operation : Allows you to adjust the display brightness. 5 levels are available.
Door SW(SW701)
Outline of Operation : Allows you to open the door.
Talk SW(SW202)
Outline of Operation : To answer a door call and/or speak to the visitor .
Speech network(IC301,IC303)
Operating Power Supply : +12V(IC301,IC303)
Package : 8pin DMP8
Outline of Operation : The voice signal from the Microphone or the PBX I/F is amplified and sent to the Door Station. Or The
voice signal from the Door Station is amplified and sent to the Speaker or the PBX I/F.
voice signal from the Door Station is amplified and sent to the Speaker or the PBX I/F.
+5V Regulator(IC2)
Input Voltage : +12V
Output Voltage : +5V
Package : 3pin TO-220F
Outline of Operation : It generate from +12V to +5V.
12.1.3. POWER BOARD/PFUP1476ZA
+12V Regulator(IC1)
Input Voltage : +24V
Output Voltage : +12V
Package : DMP8
Outline of Operation : It generate from +24V to +12V.
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