Samsung MAX A55U – three CD changer – Power board, amplifier section circuit diagram, micom initialization
Samsung MAX-A55U, MAX-A55U/XAH Three-CD Changer MINI-Compact System SMPS, Power amp schematic, system update
Output PowerAMP TYPE: ANALOG AMP
OUTPUT: 90W x 2
TOTAL: 180W (PMPO 3000W)
Main
System MICOM control Function IC (R2S15904), Tuner pack, CD deck.
It gets all information from R2S15904. They have a communication among the with HOST ↔ SLAVE interface.
And Main System MICOM gets the information from User’s remote control. So whenever it gets the information, it displays it on the VFD.
* The CD Deck transfer the audio data to R2S15904.
* AUX Jack and Tuner pack are each connected to R2S15904. Data from AUX and tuner transfer to R2S15904.
Then, after processing, the data will send the date to AMP IC.
It gets all information from R2S15904. They have a communication among the with HOST ↔ SLAVE interface.
And Main System MICOM gets the information from User’s remote control. So whenever it gets the information, it displays it on the VFD.
* The CD Deck transfer the audio data to R2S15904.
* AUX Jack and Tuner pack are each connected to R2S15904. Data from AUX and tuner transfer to R2S15904.
Then, after processing, the data will send the date to AMP IC.
SMPS (Power board) schematic
MAX55U SMPS
Cases of the SMPS Protection.
1. If there is over current at the AMP IC. (Speaker Wire Short)
2. If temperature of the Amp IC is over 150°C.
3. There is no power input at GATE DRIVER
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MAX A55U SMPS
Power amplifier schematic
MICOM
Initialization & Update
MICOM
initial
In STANDBY condition, press ‘STOP’ button of Main Unit 5 seconds more, time display as ‘--:--’.
Then Initialization complete. MICOM update
MICOM update process has changed. Need new MICOM update jig (SANYO TCB87) and debugging program installed PC.
1. Turn on PC and connect TCB87 to PC by USB.
2. Connect TCB87 to SET.
(In MAIN PCB (Location No.: UCW0), Connecting 6 pin cable wire to Update connector.)
3. Turn on SET. (or power cord in)
4. Load update HEX file in the PC. (by SANYO MICOM debugging program)
5. Update.
6. Quit SANYO MICOM debugging program.
7. Turn off SET.
8. Disconnect 6 pin wires from SET.
9. Done. (Update is available only OTP/Flash type MICOM.)
In STANDBY condition, press ‘STOP’ button of Main Unit 5 seconds more, time display as ‘--:--’.
Then Initialization complete. MICOM update
MICOM update process has changed. Need new MICOM update jig (SANYO TCB87) and debugging program installed PC.
1. Turn on PC and connect TCB87 to PC by USB.
2. Connect TCB87 to SET.
(In MAIN PCB (Location No.: UCW0), Connecting 6 pin cable wire to Update connector.)
3. Turn on SET. (or power cord in)
4. Load update HEX file in the PC. (by SANYO MICOM debugging program)
5. Update.
6. Quit SANYO MICOM debugging program.
7. Turn off SET.
8. Disconnect 6 pin wires from SET.
9. Done. (Update is available only OTP/Flash type MICOM.)