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A site where discontinualed schematic diagrams and back dated information can be found on discontinued radios tv's and any electronic equipment can be found. Newer manuals either Service and operating manuals. Radio amateurs should find this site a great source for ham radio equipment manuals. I will return to this site should I need information on any electrical equipment. priced easy to download in a PDF format and print pages need to undertake the repair.
Quality scan of the original. All the detail necessary to troubleshoot, repair and adjust the unit. I'm sure I will be downloading more manuals in the future as the need arises.
Exactly as described, a Service Manual complete with the schematics and PCB layout delivered in a timely manner. Many thanks for the great service.
IC, UPD16432B Pin No.
1~4 5 6 ~ 10 11 12 13 14 15 16 17
A MAIN C.B
LED1~4 VSS VCL5 ~1 VLCD VCC SYNC LCD OFF RESET KEYREQ CLI
O I/O I O I LED output, Nch open-drain. GND.
Dot matrix LCD driver power supply. LCD driver power supply. Internal logic power supply. Input/output singnal synchronization. When "L", a forced LCD OFF operation is performed, and SIGn & COMn output the unselected waveform. Initial state is set when "L". "H" if there is KEY data, "L" if there is none. KEY data can be read in respective of the state of this pin, CMOS output. DATA shift clock. DATA is read on rising edge, and output on falling edge. Performs input of commands, key data etc., and key data output. Input is performed from the MSB on the rise of the shift clock, and the first 8 bits are recognized as a
TUN101 TP1(Lch) SFR202 (Rch) TP2(Rch) GND
command. Output is perform from the MSB on the fall of the shift clock. Output is Nch open-drain.
19 20, 21 22 ~ 25 26 ~ 33 34 ~ 90 91 ~ 100
STB OSCIN,OSCOUT KEY1~4 KS1~6 SEG9~65 COM9~O
I I/O I O O O
Strobe input, DATA input is unabled when "H". Command processing performed on a fall. Oscillation circuit. KEY scanninng key data input. KEYscanning key source output. Dot matrix LCD segment output. Dot matrix LCD common output. 1. Dolby NR Adjustment Settings : â¢ Test tape : TTAâ200 â¢ Test points : TP1(Lch), TP2(Rch) â¢ Adjustment location : SFR201(Lch), SFR202(Rch) Method : 1. Play a Dolby NR tape and adjust SFR201 and SFR202 so that the Lch (TP1) and Rch(TP2) levels are 300 Â± 5mV. 2. Adjust the level in the forward running direction, and then check in the reverse direction. If the level drifts from the specification, perform readjustment.
PRACTICAL SERVICE FIGURE
<FM SECTION> IHF Sensitivity: (S/N 30dB) Signal to noise ratio: Less than 10 dBÂµV [at 87.5/98.0/108.0 MHz] More than 57 dB (mono) More than 57 dB (stereo) [at 87.5/98.0/108.0 MHz] Less than 1.5% (mono) Less than 2.0% (stereo) [at 98.0 MHz] More than 22 dB [at 98.0 MHz] 10.7 MHz <LW SECTION> Sensitivity: (S/N 20 dB) Signal to noise ratio: (INPUT 74 dB) Distortion: Less than 40 dBÂµV [at 162/216/270 kHz] More than 37 dB [at 162/216/270 kHz] Less than 1.5% [at 216 kHz]
Stereo separation: IF Frequency: <MW SECTION> Sensitivity: (S/N 20 dB) Signal to noise ratio: (INPUT 74 dB) Distortion: IF Frequency: 15
Tape speed: Wow & flutter: Max Output level: Distortion (PB): Noise level: Signal to noise ratio: 2955 ~ 3090Hz (TTA-100) Less than 0.35% (R.M.S) more than 9 V (TTA-210) Less than 2.0% (TTA-210) Less than 100 mV (at 120 Âµs, Vol Max) More than 48 dB
Less than 35 dBÂµV [at 603/999/1404 kHz] More than 42 dB [at 603/999/1404 kHz] Less than 1.5% [at 999 kHz] 450 kHz 16