Onkyo TX 930 Service Manual
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Extracted text from Onkyo TX 930 Service Manual (Ocr-read)
Page 1
TXA910/ TX-930
Ref. No. 3443
ONKYO SERVICE MANUAL
QUARTZ SYNTHESIZED
TUNER AMPLIFIER
MODEL TX-91 0
MODEL TX-93O
Black and Silver models
BHMD. BHMDN
120V AC, 60Hz
BHMP. BHMPF, MP. MPF
230V AC, 50Hz
B H M W
120V or 220V AC, 50/60Hz
BHMQA
240V AC, 50Hz
SAFETY-RELATED COMPONENT WARNINGH
COMPONENTS IDENTIFIED BY MARK A ON
THE SCHEMATIC DIAGRAM AND IN THE PARTS
LIST ARE CRITICAL FOR RISK OF FIRE AND
ELECTRIC SHOCK, REPLACE THESE COMPO'
NENTS WITH ONKYO PARTS WHOSE PART
NUMBERS APPEAR AS SHOWN IN THIS
MANUAL.
MAKE LEAKAGECURRENT OR RESISTANCE
MEASUREMENTS TO DETERMINE THAT EXPOSED
PARTS ARE ACCEPTABLY INSULATED FROM
THE SUPPLY CIRCUIT BEFORE RETURNING
THE APPLIANCE TO THE CUSTOMER
ONKYO
IIIIIIIII BUMPIIIIIIIIS
TABLE OF CONTENTS
Specifications .................................
Service procedures .........................
Exploded View Model TIC-930 --------------------
Parts list Model TX-930 -
Exploded View Mode] TXJBIO --------------------
Parts list Model TXVQIO -------------
Block diagram Model TX-QSO ---------
Block diagram Model "TX-910 ----------
IC block diagram and descriptions
Packing View ......................
Adjustment procedures --------------------
Printed circuit board View from bottom side ------------------ 23
Schematic diagram
Model TX-930 .......................................................... 25
IVIUCIE'I TX7910 .......................................................... 29
Printed circuit board-parts list
Model TX_930 .........................................
Model TXVQIO .........................................
Page 12
X-910/TX-930
IC BLOCK DIAGRAM AND DESCRIPTION
LM7001(PLL synthesizer and controller)
l4
PD!
5 Phase Detector
5760-4
1"] Charge Pump 15 Pm
XlN Reference Divider
xour
FMI 2 VDDl
Progremable Divider 13 VDDZ
10
W
AM} 16 V55
shift Register - Latch
3% Bela 9
CE CL DATA 1
Pin No. Terminal Description
1 XOUT
Connect to the 7.2 MHz crystal oscillator.
2 XIN
3 CE Chip enable terminal. Connect to the PLL terminal of micro processor.
4 Cl. Serial clock input terminal. Connect to the CLOCK terminal of micro processor.
5 DATA Serial data input terminal. Connect to the DATA terminal of micro processor.
6 §W Not used.
7 AUTO/MONO Auto/Mono control output terminal. H" when Auto.
8 302 FM control signal output terminal. L" when FM.
9 803 AM control signal output terminal. L when AM.
10 AMIN AM local oscillator input terminal.
I l FMlN FM local oscillator terminal.
12 VDD 1 Power supply terminal for back-up.
l3 VDD 2 Power supply terminal,
14 PDl Charge pump output of the phase detector which constitutes the PLL. High level is output when the
WW divided local oscillator frequency is high than the reference frequency.
15 P02 In the opposite case, low level is output. Floating occurs when the frequencies matched.
The output is applied to the variable capacitor diode in the local oscillator through the low pass
filters.
16 Vss Ground terminal.
._12_