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SERVICE MANUAL A A G G - - D D 7 7 9 9 0 0 0 0 AV Digital Home Theater Receiver NOTES PC boards shown are viewed from parts side. ● The parts with no reference number or no parts number in the ●...
CONTENTS SPECIFICATIONS..........................3 SAFETY INSTRUCTIONS ........................4 MEASUREMENTS AND ADJUSTMENTS ..................5 FIP DISPLAY ............................8 DISPLAY PIN CONNECTION ......................9 IC BLOCK DIAGRAMS AND PIN FUNCTIONS ................10 EXPLODED VIEWS AND PARTS LIST .....................22 PC BOARDS AND PARTS LIST ......................24 INCLUDED ACCESSORIES .......................30...
SAFETY INSTRUCTIONS PRECAUTIONS DURING SERVICING The leakage-current should be less than 0.5mA rms AC. The resistance measurement should be done between 1. Parts identifide by the ( )symbol parts are critical accessible exposed metal parts and power cord plug for safety. Replace only with parts number specified. prongs with the power switch (if included) "ON".
MEASUREMENTS AND ADJUSTMENTS ALIGNMENT INSTRUCTIONS EQUIPMENT NEEDED: AM Signal Generator FM Signal Generator Oscilloscope VTVM(AC, DC) Test loop antenna (AM Adjustment) Dummy antenna (FM Adjustment) Distortion analyser IMPORTANT 1. Check power-source voltage. 2. Set the function switch to band aligned. 3.
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1. TUNING FREQUENCY RANGE ADJUSTMENTS (FM) DC VOLTMETER ....CONNECT TO TEST POINT J208 and GND Band Frequency Adjust for Adjustment 87.50MHz 1.6V 530 kHz L105 J208 [US/C] [530 kHz] [1V] [L105] 2. AM TRACKING ADJUSTMENT Signal Generator ......Connects to the AM ANT. Coil through the loop antenna. Adjust for the indication of VTVM of the wave form of scope to be maximum.
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4. FM MONO DISTORTION ADJUSTMENT DC VOLT METER ......Connect to J205 (-), J207 (+) through the chock coil (100uH). Signal Generator ......Connect to FM ANT Jack (FM IN) through the dummy. Distortion Meter ......Connect to the output. Frequency Adjust for Adjustment 100.10MHz T101...
IC PIN FUNCTION (u-COM : ANAM1308AT,O.T.P :TMP87PM78F) : IC71 PIN No. SYMBOL DESCRIPTION 1,25 Power Supply Port(+5V) Function SW1,SW2 Function Encoder Control Port Speaker ON/OFF Front Speaker Relay Drive Port(“H”) Not Use(No connection) DSP Reset Reset (Initial Clear) Port for YSS912 Surr.
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Dolby Digital/Pro Logic DTS DECODER (YSS912C:INPUT IC43) PIN No. SYMBOL DESCRIPTION 1,31,71 VDD1 +5V Power Supply(for I/Os) RAMCEN External SRAM interface /CE RAMA16 External SRAM interface address 16 RAMA15 External SRAM interface address 15 SDIB0 PCM input 0 to Sub DSP(not use) SDIB1 PCM input 1 to Sub DSP(not use) SDIB2...
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PIN No. SYMBOL DESCRIPTION RAMA2 External SRAM interface address 2 72 ~ 79 RAMD0~7 I+/O External SRAM interface data (STREAM0~7 output when External SRAM is not in use) SDWCK0 Word clock input for SDIA, SDOA, SDIB, SDOB SDBCK0 Bit clock input for SDIA,SDOA,SDIB,SDOB SDIA0 AC-3 Bitstream (or PCM) data input for Main DSP SDIA1...
INCLUDED ACCESSORIES REF.NO. PARTS NO. DESCRIPTION REMARKS 9A08901100 OWNER'S MNL,E/F CQX1A707Z 9A08763300 REMOTE CONTROL UNIT,UR‑417 CARTAGD8900 9A08886000 ANT,FM T CSA1A010Z 9A08886100 AM LOOP ANTENNA ASSY CSA3A011Z ...
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AG-D7900 BLOCK DIAGRAM A A G G - - D D 7 7 9 9 0 0 0 0 AV Digital Home Theater Receiver 1 st Issue; July 2001...
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AG-D7900 SCHEMATIC DIAGRAM NOTES: 1. Resistor values are in ohms (k=kilo-ohms, M=megohms). 2. Capacitor values are in microfarads (p=picofarads). 3. £Parts marked with this sign are safety critical components. They must always be replaced with identical components-refer to the appropriate parts list and ensure exact replacement.
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AG-D7900 SCHEMATIC DIAGRAM NOTES: 1. Resistor values are in ohms (k=kilo-ohms, M=megohms). 2. Capacitor values are in microfarads (p=picofarads). 3. £Parts marked with this sign are safety critical components. They must always be replaced with identical components-refer to the appropriate parts list and ensure exact replacement.
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AG-D7900 SCHEMATIC DIAGRAM A A G G - - D D 7 7 9 9 0 0 0 0 NOTES: INSTRUCTIONS FOR SERVICE PERSONNEL 1. Resistor values are in ohms (k=kilo-ohms, M=megohms). BEFORE RETURNING APPLIANCE TO THE CUSTOMER, MAKE LEAKAGE- 2.
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