Differences

This shows you the differences between two versions of the page.

--- projects:yamaha_r840 [2025/11/20 18:24] – [Yamaha Loudness] admin
+++ projects:yamaha_r840 [2025/12/01 07:53] (current) – admin
@@ Line 1: / Line 1: @@
+~~META:
+title=Yamaha MCR-840
+description=Yamaha R-840 repair and hacking
+keywords=SEO, dokuwiki, disassembly, yamaha, R840, music, hack, hacking, audio, iPod, system connector, repair
+~~
 ====== Yamaha Audio Amp/Receiver ======
 ===== Yamaha MCR-840 =====
@@ Line 43: / Line 49: @@
 Probably more Yamaha systems can be repaired in that scheme. \\
+==== Remote control ====
+There is nothing much to say. It is a simple iR remote control. The main IC is marked "2428662 03160". \\
+iR codes for R840 can be found on page 80/150 of service manual (next to remote control schematic). \\
+Here is an unspectacular insight: \\
+{{:projects:yamaha:rc1.jpg?125|}}
+{{:projects:yamaha:rc2.jpg?200|}} \\
+I have taken the pictures so you can see at which positions the holding clips are - don't forget about the single screw in the battery compartment.
+The buttons and their layout of remote control for DVD and BD versions differ slightly. \\
 ==== Disc Player manual eject ====
 The players only turn on with system connector plugged into R840 amp (see [[projects:yamaha_r840#the_round_one|below how to simulate system connector]]). \\
@@ Line 82: / Line 96: @@
 === the flat one: writing port ===
-Yamaha devices use a so called "writing port", a flat cable, e.g. for flash ucom via RS232-adapter. It is known for updating firmware over PC software (which we don't have). \\
+This is just an FYI, IMO we cannot do anything useful with the port. \\
+Yamaha devices use a so called "writing port", a flat cable, e.g. to flash ucom via RS232-adapter. It is known for updating firmware over PC software (which we don't have). \\
 R840 uses Renesas M16C/64 R5F3640DNFA MCU. Service manual states to use FlashSta.exe (which we don't have, neither R840_xxx.mot + R840_xxx.id firmware), FYI see [[https://www.renesas.com/en/document/mat/m16c-flash-starter-m3a-0806-users-manual?srsltid=AfmBOoouDn1Ckenn0l-1YUgHz2BwZHPVGnbNhIjZUAa85k5-iwqpdRbM|Renesas M16C flashing guide]]. If you still want to look into flashing M16C MCU go to
@@ Line 113: / Line 128: @@
 [[http://www.ipodlinux.org/Apple_Accessory_Protocol/]] \\
 [[https://github.com/xtensa/PodEmu/tree/master|xtensa/PodEmu: Android application that emulates iPod to use together with old 30-pins iPod serial interface]] \\
+[[https://xdaforums.com/t/app-3-0-podemu-connect-android-to-30pin-ipod-docking-station-or-car.3234840/|PodEmu on XDA]] \\
 [[https://github.com/xtensa/oap|xtensa/oap: Implementation of iPod serial communication protocol used in old 30-pin iPod interfaces]] \\
 [[https://github.com/oandrew/ipod-gadget|oandrew/ipod-gadget: iPod usb gadget for audio playback]] \\
@@ Line 188: / Line 204: @@
 === iR codes ===
-iR codes for R840 can be found on page 80/150 of service manual (next to remote control schematic). \\
 [[https://github.com/theCstokes/YamahaRemote/blob/master/IR_RX-V667-3067_rev0.0_Full.xls|yamaha V667 etc iR codes]] \\