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To engineers in charge of repair or inspection of our products.
Before repair or inspection, make sure to follow the instructions so that customers and Engineers in charge of repair or inspection can avoid suffering any risk or injury.
1. Use specified parts. The system uses parts with special safety features against fire and voltage. Use only parts with equivalent characteristics when replacing them. The use of unspecified parts shall be regarded as remodeling for which we shall not be liable. The onus of product liability (PL) shall not be our responsibility in cases where an accident or failure is as a result of unspecified parts being used. 2. Place the parts and wiring back in their original positions after replacement or re-wiring. For proper circuit construction, use of insulation tubes, bonding, gaps to PWB, etc, is involved. The wiring connection and routing to the PWB are specially planned using clamps to keep away from heated and high voltage parts. Ensure that they are placed back in their original positions after repair or inspection. If extended damage is caused due to negligence during repair, the legal responsibility shall be with the repairing company. 3. Check for safety after repair. Check that the screws, parts and wires are put back securely in their original position after repair. Ensure for safety reasons there is no possibility of secondary ploblems around the repaired spots. If extended damage is caused due to negligence of repair, the legal responsibility shall be with the repairing company. 4. Caution in removal and making wiring connection to the parts for the automobile. Disconnect the battery terminal after turning the ignition key off. If wrong wiring connections are made with the battery connected, a short circuit and/or fire may occur. If extensive damage is caused due to negligence of repair, the legal responsibility shall be with the repairing company. 5. Cautions in soldering Please do not spread liquid flux in soldering. Please do not wash the soldering point after soldering. 6. Cautions in soldering for chip capacitors Please solder the chip capacitors after pre-heating for replacement because they are very weak to heat. Please do not heat the chip capacitors with a soldering iron directly. 7. Cautions in handling for chip parts. Do not reuse removed chips even when no abnormality is observed in their appearance. Always replace them with new ones. (The chip parts include resistors, capacitors, diodes, transistors, etc). Please make an operation test after replacement. 8. Cautions in handling flexible PWB Before working with a soldering iron, make sure that the iron tip temperature is around 270 . Take care not to apply the iron tip repeatedly(more than three times)to the same patterns. Also take care not to apply the tip with force. 9. Turn the unit OFF during disassembly and parts replacement. Recheck all work before you apply power to the unit.
TROUBLESHOOTING
Power doesn't turn on
CHECK ITEM 1 Power supply of B/U and ACC CHECK POINT ACC: Q301,D301,D302 VDD+5V: IC503,D506 B/U DET: IC504 CAN Line: IC403 CAN Line: IC402 SYS+5V: Q506 Around IC402 and IC403
2 Display 3 Key operation
4
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No sound
CHECK ITEM 1 Key operation 2 Power supply of IC201 (DSP) CHECK POINT Audio CPU: IC402 SYS+3.3V: IC501 DSP1.8V: IC209
3 Output wave form of IC201 Line between IC402 and IC201 (DSP) 4 Output wave form of IC301 SYS+9V: IC502 (20k LPF) 1/2 SYS+9V: IC302 Around IC301 5 Output wave form of IC700 Around IC700 and IC701 and IC701 (Pre-AMP) 6 ----Confirm whether the output load is 4ohm etc.
Radio doesn't work.
CHECK ITEM 1 Input of antenna 2 SEEK 3 TUN+9V, TUN+5V CHECK POINT Connection of antenna Tuner pack and ANT line TUN+9V: Q503 TUN+5V: Q501 Tuner-I2C line Output wave form of CCT401, R415 and R416 Tuner pack BL101 DSP: IC201
