![background image](http://html1.mh-extra.com/html/zetron/4010/4010_service-manual_3539896012.webp)
Model 4010 Radio Dispatch Console Service Manual
12
digital communication to the board. The two channels function similar and only channel A will be
followed. The data in from the microprocessor (DI) are synchronously clocked to the 16 bit serial
shift register U26 and U29 using the CHWR* and ENCHA* signals. The data to the microprocessor
(DO) is simultaneously clocked out of U35. U26 and U29 form a 16-bit output latch, which controls
the operation of the board. The outputs are buffered by U18 and U23, which convert the 5V signals
to 12V to drive the various audio switches. U35 is an 8-bit input port that specifies the board type
and monitors the ring detector and call activity.
The telephone line’s tip and ring are connected to J1. In the off-hook state, the signal goes through
relay K1 to the ring detect circuit of U19. The signal flows through U22C, U22F and U28A to U35.
The microprocessor reads the status of U35 with the SPI bus. The ring detect signal also goes
through U18A to the tone generator U6. When a ring is detected, U6 generates a ringing tone at pin
14 and sums it on the audio receive bus at U3A. When the call is answered, relay K1 is activated
with the AUXOUTA signal and the line is switched to relay T1.
The three input audio busses are PAT-TX-BUS (patch transmit bus), TONE-BUS (DTMF tones) and
MIC-BUS (operator’s audio). These busses are switched by U17A and U17B to the input of U8B.
The output of U8B goes to the audio switch U15C is used to enable the audio to the output amplifier
U4A. The audio also goes to U11, which forms a peak detector that prohibits the transmitted audio
from exceeding -10dBm average for over 2 seconds. The output of the detector controls the audio
switch U15C through U18C.
The center tap of the transformer T1 is connected to the line termination network of U1A. Potentio-
meter R16 set the resistive balance and is usually set for minimum sidetone. R21 is used for capaci-
tive balance and is also adjusted for minimum sidetone. The audio receive amplifier, U1B, goes
through the switch U15B and to the audio level adjustment R18. U3B form a peak detect circuit and
generates the voice activated signal to U35. The receive audio also goes to the summing node of
U3A. The audio signal goes to the switch U15A to the PATCH-RX-BUS and to U13, the volume
control selector. U13 multiplexes the RXA signal through a resistive network to give 4dB adjustment
steps. The A, B and C signals to U13 selects which resistive path the audio takes and the INH signal
will inhibit all switches from closing and provide a completed muted signal. If no audio muting is
selected, the audio will be switched through R72 giving the maximum signal level. The output
amplifier U8A will drive either the SEL-BUS or UNS_BUS depending on the U17C switch setting.
AUXILIARY I/O CARD (950-9721)
The Auxiliary I/O Card will expand the I/O capability of the system by adding 6 outputs and 6
inputs. The card is installed in any of the six dual channel card slots and the connection to the I/O are
on the interface connectors J2 through J4 depending on the slot(s) the card is installed in.
The I/O Card schematic 008-9448 shows the SPI bus signals DI, DO, SCLK* and enable signal
ENCHA*. The data in from the microprocessor (DI) are synchronously clocked to the 8-bit serial
shift register U2 and into the output latch using the CHWR* and ENCHA* signals. Six of the out-
puts use the transistor driver IC, U1, to control the output relays K1 through K6. The data to the
microprocessor (DO) is simultaneously clocked out of U5 and U6. U5 monitors the six input signals
and U6 identifies which card type is installed.
The inputs from the interface connector have a 10K-ohm pull-up to 12Vdc, a 10K-ohm series
resistor, a Zener diode to limit the voltage level and a .01 microfarad capacitor for noise filtering. U4
is a 74HC14 that provides a Schmitt trigger input.
The relay outputs each have two jumpers associated with them. Output 1 has one connection RLY1A
on P4-5 and the second connection RLY1B on P4-4. The RLY1A connects to JP7, which makes a
normally open output in position A and a normally closed output in position B. The common connec-
tion of K4 goes to JP1, which is connected to RLY1B in position A. With JP1 in position B the relay
common is connected to digital ground. With jumpers in both positions B and D the RLY1A signal
is connected to ground when the output is on and RLY1B is connected to ground when the output is
off.
TONE REMOTE SYSTEM ADAPTER (950-0255)
The Tone Remote System Adapter adds the tone remote capability to all the radio channels. The card
adds the 2175Hz guard tone to the system and guard tone filters on the four audio busses. The
schematic for the card is 008-0037.
From the Control Board’s interface connector J1, the unselect bus (UNS IN), select bus (SEL IN),
microphone bus (MIC IN) and the patch bus (PAT IN) all go through a low-pass filter to a 2175HZ
notch filter. The switch capacitor filter (U19 through U22) is a 35dB notch filter centered at 2175Hz
and a 200Hz bandwidth. The output of the notch filter, N/HPB, goes trough a low-pass filter and
back to the interface connector J1. The jumpers JP6 and JP7 allow the filters to be removed for the
patch bus and mic bus.
U17 interface to the crystal Y1 and along with U14 and U16B form the 2175Hz oscillator. U18B and
U15 form a filter and amplifier for the guard tone. R47 provides the amplitude adjustment.
Sheet 2 of the schematic is for audio delay, and the components are not included with this assembly.
TONE REMOTE SYSTEM ADAPTER W/AUDIO DELAY (950-9922)
The Tone Remote System Adapter with Audio Delay adds the tone remote capability to all the radio
channels. The card adds the 2175Hz guard tone to the system and guard tone filters on the four audio
busses. The card also provides a variable audio delay for two of the busses, patch bus and
microphone bus. The schematic for the card is 008-9896.
From the Control Board’s interface connector J1, the unselect bus (UNS IN), select bus (SEL IN),
microphone bus (MIC IN) and the patch bus (PAT IN) all go through a low-pass filter to a 2175HZ
notch filter. The switch capacitor filter (U19 through U22) is a 35dB notch filter centered at 2175Hz
and a 200Hz bandwidth. The output of the notch filter goes through a low-pass filter. The select bus
and unselect buses are then the UNS OUT and SEL OUT signals on connector J1. The patch bus and
mic bus go to the jumpers JP6 and JP7 which allow the notch filters to be bypassed and then go to
the audio delay circuits on sheet 2.
Summary of Contents for 4010
Page 2: ...Model 4010 Radio Dispatch Console Service Manual 2 This page intentionally left blank...
Page 4: ...Model 4010 Radio Dispatch Console Service Manual 4 This page intentionally left blank...
Page 6: ...Model 4010 Radio Dispatch Console Service Manual 6 This page intentionally left blank...
Page 17: ...Model 4010 Radio Dispatch Console Service Manual 17...
Page 18: ...Model 4010 Radio Dispatch Console Service Manual 18...
Page 23: ...Model 4010 Radio Dispatch Console Service Manual 23 Control Board Silkscreen...
Page 24: ...Model 4010 Radio Dispatch Console Service Manual 24 Control Board Schematic 008 9376M...
Page 25: ...Model 4010 Radio Dispatch Console Service Manual 25...
Page 26: ...Model 4010 Radio Dispatch Console Service Manual 26...
Page 27: ...Model 4010 Radio Dispatch Console Service Manual 27...
Page 28: ...Model 4010 Radio Dispatch Console Service Manual 28...
Page 29: ...Model 4010 Radio Dispatch Console Service Manual 29...
Page 31: ...Model 4010 Radio Dispatch Console Service Manual 31 Display Board Silkscreen...
Page 32: ...Model 4010 Radio Dispatch Console Service Manual 32 Display Board Schematic 008 9378E...
Page 34: ...Model 4010 Radio Dispatch Console Service Manual 34 Keypad Board Schematic 008 9379C...
Page 37: ...Model 4010 Radio Dispatch Console Service Manual 37 60 Button Panel Schematic 008 9432A...
Page 38: ...Model 4010 Radio Dispatch Console Service Manual 38...
Page 39: ...Model 4010 Radio Dispatch Console Service Manual 39...
Page 42: ...Model 4010 Radio Dispatch Console Service Manual 42 Dual Channel Board Silkscreen...
Page 43: ...Model 4010 Radio Dispatch Console Service Manual 43 Dual Channel Board Schematic 008 9377L...
Page 44: ...Model 4010 Radio Dispatch Console Service Manual 44...
Page 45: ...Model 4010 Radio Dispatch Console Service Manual 45...
Page 46: ...Model 4010 Radio Dispatch Console Service Manual 46...
Page 48: ...Model 4010 Radio Dispatch Console Service Manual 48 DC Remote Daughter Board Silkscreen...
Page 51: ...Model 4010 Radio Dispatch Console Service Manual 51 Tone Remote System Adapter Silkscreen...
Page 55: ...Model 4010 Radio Dispatch Console Service Manual 55 Tone Remote Board Schematic 008 0037A...
Page 56: ...Model 4010 Radio Dispatch Console Service Manual 56...
Page 57: ...Model 4010 Radio Dispatch Console Service Manual 57...
Page 61: ...Model 4010 Radio Dispatch Console Service Manual 61...
Page 62: ...Model 4010 Radio Dispatch Console Service Manual 62...
Page 64: ...Model 4010 Radio Dispatch Console Service Manual 64 Tone Remote LOTL Board Silkscreen...
Page 65: ...Model 4010 Radio Dispatch Console Service Manual 65 Tone Remote LOTL Board Schematic 008 9450D...
Page 68: ...Model 4010 Radio Dispatch Console Service Manual 68 Single Phone Patch Card Silkscreen...
Page 70: ...Model 4010 Radio Dispatch Console Service Manual 70...
Page 71: ...Model 4010 Radio Dispatch Console Service Manual 71...
Page 74: ...Model 4010 Radio Dispatch Console Service Manual 74 Dual Phone Patch Silkscreen...
Page 75: ...Model 4010 Radio Dispatch Console Service Manual 75 Dual Phone Patch Schematic 008 9522G...
Page 76: ...Model 4010 Radio Dispatch Console Service Manual 76...
Page 77: ...Model 4010 Radio Dispatch Console Service Manual 77...
Page 79: ...Model 4010 Radio Dispatch Console Service Manual 79 Auxiliary I O Board Silkscreen...
Page 80: ...Model 4010 Radio Dispatch Console Service Manual 80 Auxiliary I O Board Schematic 008 9448D...
Page 82: ...Model 4010 Radio Dispatch Console Service Manual 82 Tone LOTL DTMF Decoder Silkscreen...
Page 83: ...Model 4010 Radio Dispatch Console Service Manual 83 Tone LOTL DTMF Decoder Schematic 008 9535C...
Page 85: ...Model 4010 Radio Dispatch Console Service Manual 85 Channel 5 Tone ANI Decoder Silkscreen...
Page 92: ...Model 4010 Radio Dispatch Console Service Manual 92 Control Board Silkscreen...
Page 93: ...Model 4010 Radio Dispatch Console Service Manual 93 Control Board Schematic 008 9569J...
Page 94: ...Model 4010 Radio Dispatch Console Service Manual 94...
Page 95: ...Model 4010 Radio Dispatch Console Service Manual 95...
Page 96: ...Model 4010 Radio Dispatch Console Service Manual 96...
Page 97: ...Model 4010 Radio Dispatch Console Service Manual 97...
Page 98: ...Model 4010 Radio Dispatch Console Service Manual 98...
Page 100: ...Model 4010 Radio Dispatch Console Service Manual 100 Display Keyboard Silkscreen...
Page 101: ...Model 4010 Radio Dispatch Console Service Manual 101 Display Keyboard Schematic 008 9570D...
Page 102: ...Model 4010 Radio Dispatch Console Service Manual 102...
Page 103: ...Model 4010 Radio Dispatch Console Service Manual 103...
Page 105: ...Model 4010 Radio Dispatch Console Service Manual 105 60 Button Interface Schematic 008 9572D...
Page 107: ...Model 4010 Radio Dispatch Console Service Manual 107 30 Button Board Silkscreen...
Page 108: ...Model 4010 Radio Dispatch Console Service Manual 108 30 Button Board Schematic 008 9711A...
Page 109: ...Model 4010 Radio Dispatch Console Service Manual 109...
Page 110: ...Model 4010 Radio Dispatch Console Service Manual 110...
Page 112: ...Model 4010 Radio Dispatch Console Service Manual 112 Controller Board Silkscreen...
Page 113: ...Model 4010 Radio Dispatch Console Service Manual 113 Controller Board Schematic 008 9712A...
Page 118: ...Model 4010 Radio Dispatch Console Service Manual 118 Keyboard Schematic 008 9323A...
Page 119: ...Model 4010 Radio Dispatch Console Service Manual 119...
Page 120: ...Model 4010 Radio Dispatch Console Service Manual 120...
Page 122: ...Model 4010 Radio Dispatch Console Service Manual 122 Controller Board Silkscreen...
Page 123: ...Model 4010 Radio Dispatch Console Service Manual 123 Controller Board Schematic 008 9167E...