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There are currently no product reviews.
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Exactly what was needed to assess the product - excellent value and great service
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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.
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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.
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Exactly as described, a Service Manual complete with the schematics and PCB layout delivered in a timely manner. Many thanks for the great service.
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some of the writing is a bit blur but the part in the schmatic was great and i have fixed the machine thanks
ADJUSTMENT
A MAIN C.B L451 (BAR-ANT)
VT GND PHONES
5 1 5
8 6
*
J101
CT401
CT402
2
GND TP2 (RCH)
IFT451
IC451 VT GND
11 12
CT451
SFR 201
8
9
TP1 (LCH)
7
VR101
VOLUME
SFR 451
TP3(VT)
B
A
C
D
9
Note :
9
34
* : J101 On the other side of the components.
<RADIO SECTION>
1. AM IF Adjustment IFT451 ................................................................... 450 kHz 2. FM IF Adjustment CT402 .................................................................. 10.7 MHz 3. AM VT Check Settings : � Test point : TP3 (VT) Method : Set to AM 531 kHz and check that the test point is 1.2 V ± 0.3 V. Then set to AM 1602 kHz and 1check that the test point is less than 7.8 V. 4. FM VT Check Settings : � Test point : TP3 (VT) Method : Set to FM 87.5 MHz and check that the test point voltage is 3.5 V ± 0.3 V. Then set to FM 108.0 MHz and check that the test point voltage is less than 8.5 V. 5. AM Tracking Adjustment L451 ...................................................................... 630 kHz CT451 .................................................................. 1440 kHz 6. FM Tracking Adjustment CT401 .................................................................. 87.5 MHz 7. FM VCO Adjustment Settings : � Adjustment location : SFR451 Method : Connect a frequency counter to pin 11 & 12 of IC451. Adjust SFR 451 such that the frequency counter indicates 19kHz ± 100 Hz.
<TAPE PLAYER SECTION>
8. Tape Speed Adjustment Settings : � Test tape : TTA�100 � Test point : Phones Jack (J101) � Adjustment location : SFR201 � DSL : OFF Method : Play back the test tape and adjust SFR201 for 3015 Hz ± 10 Hz (FWD) and 3015 Hz ± 50 Hz (REV). Then confirm WOW is less than 0.5%. 9. Dolby Level Adjustment Settings : � Test tape : TTA�200 � Test point : TP1(LCH), TP2(RCH) � Adjustment location : A, D (LCH) B, C (RCH) � VOLUME : MIN "0" � DOLBY SW(AU) : OFF Method : Connect a coupling capacitor (10 uF / 16 V) between the test point and AC voltage meter about. Check the test point voltage for 32 mV ± 1.0 dB. If TP1,TP2 level is different from the SPEC, perform this adjustment following the procedure below: Out level 32mV + 1dB up 32mV + 2dB up 32mV + 2.7dB up TP2 (RCH) 32mV + 1dB up 32mV + 2dB up 32mV + 2.7dB up Solder place D A A, D C B B, C
TP1 (LCH)
� 10� �6 �
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