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THANK YOU FOR A GOOD TRANSACTION, NICE COPY, CLEAR
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Very Good! All the diagram are easy to read, and its complete.
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This was an excellent source of detailed assembly information on a device which is at least 12 years old. A very lucky find, coupled with great service.
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Excellent Service Manual and best price on the Internet. This Service Manual covers everything you could ever need including full circuit schematics, component layout diagrams, stripdown procedure and full parts list/breakdown. I needed this to carry out a modification to one of these headunits and this manual covered everything I needed. Fast delivery, processed within a few hours.
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Thought I would never find a copy of the Technics SX-EN2 Service Manual until I found Owner-Manuals.com. Price was very fair and I received the download promptly. While a photocopy, it is quite readable and includes all the pertinent information and diagrams. Thank you Owner-Manuals!
IC DESCRIPTION IC, TMP87C408N (BASE UNIT)
Pin No. 1 2 3 Pin Name XOUT XIN TEST I/O O I I Oscillator out Oscillator in Tied low Hook control output (for corded phone): 0 = OFF HOOK, 1 = ON HOOK 4 HOOK CONT SPK MUTE O For ZPC-6: this pin is used as Speaker Amp, IC Mute Control) (the Mic Mute control is controlled by hardware: unmute mic when Speaker is unmute and charge not detected) Received Signal Strength Indicator: (TB31224F SIG OUT pin) 5 SIG OUT I 0 = carrier present, 1 = carrier absent NOISE DETECT 0 = Rx unlock, 1 = Rx lock 0 = Tx unlock, 1 = Tx lock 6 CHAG DET CLK EEPROM 7 8-10 11 DTMF4 DTMF3-DTMF1 DTMF0 COUNTRY S2 12 13 14 15 16 RING OFF COUNTRY S1 PAGE KEY GND PLL STB PLL DATA U LED 17 18 19 PLL CK DO EEPROM DI EEPROM TL RELAY TL MUTE M B SEL O I/O I/O I � O O I/O O O I/O I/O Rx LOCK DETECT Tx LOCK DETECT Description
Charge detect: 0 = charging, 1 = not charging. Clock of EEPROM DTMF data pin 4 (Most Significant Bit) DTMF data pin 3-1 DTMF data pin 0 (Least Significant Bit) Country option select 2. Control the shunt resistor: 1 = shunt a resistor (For U, K ONLY) Country option select 1 PAGE key: 1 = PAGE ON, 0 = STANDBY Ground Combo chip strobe signal (TB31224F) Combo chip data signal (TB31224F). In-use LED: 1 = ON, 0 = OFF. Combo chip clk signal (TB31224F). Data Input/Output of EEPROM. Line seize: 1 = line seize, 0 = off-hook Telephone Line Mute Control: 1 = MUTE. Make/Break Ratio Select 1 = 33.3%, 0 = 40% Hook detect input (for Corded Phone). 1 = ON HOOK, 0 = OFF HOOK
20
HOOK DET
I
REMARK: this pin is always PULL-HIGH for ZPC-7 or ZPC-6 (I. e. just imagine Corded phone is Always ON HOOK)
21 22 23 24 25 26 27 28
TX PWR SCRET OPT TX DATA BUZZER T P SEL RX DATA RING DET BAND SQ SELECTION
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I/O O I/O I I I/O I �
Tx power control: 0 = ON, 1 = OFF. Secret function option: 1 = YES, 0 = NO REMARK: this PULL LOW for ZPC-7 or ZPC-6 (I. e. Secret opt is DISABLED) Transmit data output Buzzer signal (key tone and paging sound ONLY) Tone/Pulse selection: 1 = Pulse, 0 = Tone Received data input Ring detect input: 1 = OFF, 0 = RING COME (MC34012) Shunt capacitor for U.S. Frequency Higher Band: 1 = shunt Cap, OUT OF RANGE FUNCTION: 1 = YES, 0 = NO Normally High, Low to reset MCU Power (VCC) 29
RESET POWER
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