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OK?..manual is complet and helpfull... for repairing such a old and rare boombox like JVC PCM it is necessary...
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Super Anleitung. Ordentliche Auflösung. Das ganze noch in Deutsch wäre zu schön. Alle Datenblätter sind sauber Kopiert und alle Leitungswege sind sauber ausgeführt
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Thanks God for the internet and thanks for the service like this - proffessional solution on time.
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About the service it's very fast and reliable. About the manual the quality is high enough to read even the tiniest details on the wiring diagrams so you can't ask much more than that, let it alone for a manual of a product from 20 years ago. Thank you, very satisfied.
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The downloaded quality was as good as the orignial
HT-R820THX OPERATION CHECK-4
OUTPUT LEVEL & THERMAL DETECTION
<Operation check of microprocessor by test mode>
The following is the procedure of checking detection operation of a microprocessor in false, by using test mode.
Output level detection
1. Set the unit to test mode " Test-3-3 " 1-1. Press and the hold down the CD button , then press the STANDBY/ON button when the unit is Power On.
Te st - _
1-2. Press the VIDEO 2 button, while the " Test - _ " is shown. Unit will be in the state of " Test-3-00 ".
Te st - 3- 00
1-3. Repeat and press SPEAKERS B button to the " Test-3-3 " is shown.
Te st - 3- 03
2. Apply signal (sine wave 1kHz, -1.5dBV) to MULTI CHANNEL (FL, FR, SL, SR, C) terminal, each channel. 3. Check that FM STEREO indicator is shown.
FM STEREO
FM STEREO
Test - 3-0 3
4. Press the STANDBY/ON button to power Off. (Exit from the test mode.)
Thermal detection 1. Set the unit to test mode " Test-3-3 " Refer to the clause of " Output level detection ". 2. Connect the resistor 1.8kohms /1W between " HT2 " and " COM " terminals of P6301.
P6301 1.8 kohms 1W
TH1 TH2 COM
COM TH2 P6301
TH1
Front side
U16 NAAF-8245
POWER AMPLIFIER PC BOARD
3. Check that FM STEREO indicator is shown.
MEMORY
MEMORY
Test - 3-0 3
4. Press the STANDBY/ON button to power Off. (Exit the test mode.)
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