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There are currently no product reviews.
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Easy to order the manual. Good quality and fast delivery.
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The Service Manual for Sansui AU-9500 was very helpfull, in complete and in good printable condition.
Thanks.
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Dear Sir,
Document is original service document of sharp. I had a problem with the door contacts. Fuses where blown. With the manual in a few minuts is was clear what the problem was.
Manual was of great help.
With kind regards,
Martie Verhoeven
The Netherlands.
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The scan is clear and well readable with very few weaker spots, usually on black background with white letters, but with enough zoom those spots can be read.
Printout is clear, the manual is complete and has all pages scanned.
I would give 5 stars, except that it is not in color, and the schematic and PCB pages are scanned on multiple pages. The document is locked (except printing) so the pages can not be extracted to compose them together for printing on the large plotter
It is worth the price tag.
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let's say first that i do not need to have a credit for my opinion, i am a retired sparkie and i voluteerd to fix an electronic device for a local "Youthgroup",as no diagram was present i checked the "net" and gambled on this site and paying some fee via PayPall, i was gladly surprised that the manual arrived as was stated, GOOD SHOW, and best wishes, John
TK-360G/(N)/370G/(N)
CIRCUIT DESCRIPTION
3) UNLOCK DETECTOR
If a pulse signal appears at the LD pin of IC2, an unlock condition occurs, and the DC voltage obtained form D1, R1, and C6 causes the voltage applied to the microprocessor to go low. When the microprocessor detects this condition, the transmitter is disabled, ignoring the push-to-talk switch input signal.(See Fig. 6)
5C
From T/R SW (D5) Q5 Pre-DRIVE AMP +B Q6 DRIVE AMP IC1 RF POWER AMP VDD R56 R57 R58 APC (IC13) IC3 (1/2) IC3 (2/2) VGG D3 ANT SW LPF ANT
IC2 D1 LD PLL IC
R1
IC13 UL
Fig. 8 Drive and final amplifier and APC circuit
C6
MPU
3) APC circuit
The APC circuit always monitors the current flowing through the RF power amplifier (IC1) and keeps a constant current. The voltage drop at R56, R57 and R58 is caused by the current flowing through the RF power amplifier and this voltage is applied to the differential amplifier IC3(1/2). IC3(2/2) compares the output voltage of IC3(1/2) with the reference voltage from IC13, and the output of IC3(2/2) controls the VGG of the RF power amplifier to make both voltages the same. The change of power high/low is carried out by the change of the reference voltage.
Fig. 6 Unlock detector circuit
4. Transmitter System
1) Microphone amplifier
The signal from the microphone passes through the limiter circuit in D23, and through the high-pass filter, the ALC circuit, the low-pass filter, the high-pass filter, and preemphasis/IDC circuit IC14. When encoding DTMF, the mute switch (Q35) is turned OFF for muting the microphone input signal. The signal passes through the D/A converter (IC17) for the maximum deviation adjustment, and goes to the VCXO modulation input.
MUTE Q35 SW MIC D23 LIMIT 12 IC14 HPF 15 ALC 16 18 19 LPF 9 HPF DTMF/ 2 TONE
4) Encode signaling
(1) QT/DQT QT,DQT data of the TOTCXO Line is output form pin 20 of the CPU. The signal passes through a low-pass CR filter and goes to the TCXO(X1). The QT,DQT data of the TOVCO Line is output form pin 22 of the CPU. The signal passes through a low pass CR filter, mixes with the audio signal, and goes to the VCO modulation input. TX deviation is adjusted by the CPU. (See fig.7) (2) DTMF/2 TONE
8 PRE EMP IDC 6
COMP
IC17 D/A LPF QT/DQT TOVCO 22 TOTCXO 20 DTMF/ IC13 2 TONE CPU 2 VCO LPF X1 TCXO
LPF AF AMP IC15 (2/2)
High-speed data is output from pin 2 of the CPU. The signal passes through a low-pass CR filter, and provides a TX and SP out tone, and is then applied to the audio processor (IC14). The signal is mixed with the audio signal and goes to the VCO. TX deviation is adjusted by the CPU. (See fig.7)
(RX Audio)
Fig. 7 Microphone amplifier
2) Drive and Final amplifier
The signal from the T/R switch (D5 is on) is amplified by the pre-drive (Q5) and drive amplifier (Q6) to 50mW. The output of the drive amplifier is amplified by the RF power amplifier (IC1) to 4.0W (1W when the power is low). The RF power amplifier consists of two MOS FET stages. The output of the RF power amplifier is then passed through the harmonic filter (LPF) and antenna switch (D3 is on) and applied to the antenna terminal. 20
5. Power supply
There are five 5V power supplies for the microprocessor: 5V,5M,5C,5R, and 5T. 5V for microprocessor is always output while the power is on. 5M is always output, but turns off when the power is turned off to prevent malfunction of the microprocessor. 5C is a common 5V and is output when SAVE is not set to OFF. 5R is 5V for reception and output during reception. 5T is 5V for transmission and output during transmission.
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