- JBL Flip3 - 11 Updates
| legg <legg@nospam.magma.ca>: Sep 06 01:22PM -0400 JBL Flip3 is a no-longer supprted bluetooth speaker the size of a flashlight - sold for <US$100. Neighbor wanted a smashed USB socket replaced. 36 SCREWS LATER, with a replaced USB socket, the thing doesn't go, though the usb port draws charging current. (0.5A reducing after some time to 300mA) Second (36 SCREWS) time round, after assuring the battery is fully charged, I hooked everything up, still in the disassembled state and let the usb charger top up the battery to 4.17V. On/off switch is not functional. When the usb charger is disconnected, the 0/1 button lamp illuminated white, but did not respond to button presses. Went through hardware reset and factory reset button press procedure - 1/0 lamp turns off. No further rssponse to button pressure. Inserted USB connector for a second, then removed it. 1/0 indicator turns white, then flashes blue. I turn on a remote bluetooth source - which sees and connects to the Flip3. Flip3 plays the source music with 1/0 indicator solid blue. No other indicator lamps illuminate - charge status etc. but volume controls work. Pressing 1/0 turns the Flip3 off, but will not restart it. USB temp insertion/extraction gets the thing back up and running with the previous BT connection automatically at previously programmed volume level. I see no I2C data traffic to the lamp control IC U2 - both lines pulled low. All supplies are present and accounted for when churning out music, but god knows what status lines and their sequencing or delays are at. How to get the 0/1 button working - battery status indicators running again ? Service manual freely available. https://www.manualslib.com/manual/1843632/Jbl-Flip-3.html#product-FLIP%203 RL |
| legg <legg@nospam.magma.ca>: Sep 06 01:37PM -0400 On Wed, 06 Sep 2023 13:22:18 -0400, legg <legg@nospam.magma.ca> wrote: <snip> >Pressing 1/0 turns the Flip3 off, but will not restart it. A little optomistic here maybe . . . no turn-off from switch in later trials. RL |
| legg <legg@nospam.magma.ca>: Sep 06 01:45PM -0400 On Wed, 06 Sep 2023 13:22:18 -0400, legg <legg@nospam.magma.ca> wrote: On Wed, 06 Sep 2023 13:22:18 -0400, legg <legg@nospam.magma.ca> wrote: <snip> >>Pressing 1/0 turns the Flip3 off, but will not restart it. >A little optomistic here maybe . . . no turn-off from switch >in later trials. . . . . but will react to turn off button press five minutes later. RL |
| Arie de Muijnck <noreply@ademu.com>: Sep 06 08:38PM +0200 On 2023-09-06 19:22, legg wrote: > JBL Flip3 is a no-longer supprted bluetooth speaker > the size of a flashlight - sold for <US$100. > Neighbor wanted a smashed USB socket replaced. ... ... > I see no I2C data traffic to the lamp control IC U2 > - both lines pulled low. That is an illegal state, I2C idle is both lines high. This indicates a double short, or a bad 16-bit expander. |
| legg <legg@nospam.magma.ca>: Sep 06 06:59PM -0400 On Wed, 6 Sep 2023 20:38:27 +0200, Arie de Muijnck <noreply@ademu.com> wrote: <snip> >> - both lines pulled low. >That is an illegal state, I2C idle is both lines high. >This indicates a double short, or a bad 16-bit expander. I realize that, which is why I mentioned it. Double shorts being hard to come by . . . . Remeasuring after hardware/factory reset shows both lines floating high, now, with no short. The TCA1116 is unobtainium. Though TI flogs a pin-compatible replacement, they refuse to supply the original TCA1116 data sheet, for performance, address and power sequencing comparisons. They will provide the old data, through email, only to registered users of E2E support. Why the shyness? The working white and blue LEDs are driven directly from the main control chip. The 0/1 switch feeds a crude SW/HW reinforced latch. RL |
| legg <legg@nospam.magma.ca>: Sep 06 07:49PM -0400 On Wed, 6 Sep 2023 20:38:27 +0200, Arie de Muijnck <noreply@ademu.com> wrote: <snip> >> - both lines pulled low. >That is an illegal state, I2C idle is both lines high. >This indicates a double short, or a bad 16-bit expander. Can now see I2C clk and data lines are running when either the charger is connected or the unit is playing. The low condition occurs when the charger is disconnected and the unit is not playing (ie is off). I guess that is reasonable. . . . silly me. . . . or I could have been measuring the wrong pins on the wrong IC (it has happened before). The volume control switches are routed through the TPS1116 - and THEY are functional. I can see the volume inc and decrement on the I2C lines in response to a button press and hear the difference. . . . . .but the battery capacity indicators and others (besides the CPU-driven 1/0 white and BT blue connect) are not being driven from the TPS1116 pins. RL |
| Arie de Muijnck <noreply@ademu.com>: Sep 07 09:56AM +0200 On 2023-09-07 01:49, legg wrote: > (besides the CPU-driven 1/0 white and BT blue connect) are > not being driven from the TPS1116 pins. > RL So maybe the MCU does not know the battery condition? Or the measured value is out of spec. Check voltage dividers etc. Does the charging stop automatically or MCU controlled? Do you have a USB-USB charge measuring dongle? (The schematics are mostly unreadable for me). Arie |
| legg <legg@nospam.magma.ca>: Sep 07 07:53AM -0400 On Thu, 7 Sep 2023 09:56:22 +0200, Arie de Muijnck <noreply@ademu.com> wrote: >Do you have a USB-USB charge measuring dongle? >(The schematics are mostly unreadable for me). >Arie I'd expect a false battery measurement by MCU to produce a low battery lamp, or not to run at all, but will check. OFF lamps are confirmed at TPS1116 output ports, so it's not a harnessing issue. MCU also looks at USB input voltage. Considering that turn-on is now triggered by USB removal, it could be that measurement that's duff. Battery charging is by MP2637 from USB, without I2C com, so probably independent, with flags back and forth. I'm monitoring USB input current flow with a UN34C. During normal charge input current never exceeds 500mA. Spends most of its time between 360 and 300mA below 3V9 terminal voltage, reducing gradually to 100mA as 4V exceeded. Bttery capacity 3000mA, so not a quick charge. Charging terminates gradually as battery exceeds 4V0 and approaches 4V17, It's hysteretic (slight audible squeeling detectable), so not a regulation text book CV charge termination. Would be inconvenient for Player to be interrupted by USB insertion - either charge or play - this is not likely a normal behavior. Boost converter MP9428 regulation also seems local - no I2C with flags. See no issues in the usual power- handling sections or supply gating switches. Service manual skinny on normal operation, fault diag or lamp - button press codes/procedures. I republished the schematics for view on normal page sizes, but expect loss of PC text searchability in the results. Also some cryptic button pushing instructions from another source. http://ve3ute.ca/query/flip3.zip RL |
| Arie de Muijnck <noreply@ademu.com>: Sep 07 02:06PM +0200 On 2023-09-07 13:53, legg wrote: > another source. > http://ve3ute.ca/query/flip3.zip > RL Thanks for the proper diagrams. I noticed that all problems seem to be with the switches and the battery state LEDs. In the flip3 indicators diagram those have the GND pin in common. The other LEDs are using VCC. Could it be that GND in that connection (J11 pin 13 to J9 pin 1) has a bad contact? That would explain most (all?) problems. You could solder a jumper wire in parallel from PCB to PCB to test this hypothesis. Arie |
| legg <legg@nospam.magma.ca>: Sep 07 10:13AM -0400 On Thu, 7 Sep 2023 09:56:22 +0200, Arie de Muijnck <noreply@ademu.com> wrote: >Do you have a USB-USB charge measuring dongle? >(The schematics are mostly unreadable for me). >Arie I found the trouble - connex were NOT OK - The ribbon cable to thecharge level display had a broken edge trace for ground connection. MCU driven leds werepull-down. Charge display is pull-up. I frankly didn't see any pulling-up going on at the TSP1116 output ports. The 0/1 switch now works for both on and off functions. Good enough for now. RL |
| legg <legg@nospam.magma.ca>: Sep 07 10:18AM -0400 On Thu, 7 Sep 2023 14:06:26 +0200, Arie de Muijnck <noreply@ademu.com> wrote: >That would explain most (all?) problems. >You could solder a jumper wire in parallel from PCB to PCB to test this hypothesis. >Arie Good Catch. It was the chafed harness edge's ground connection. The TSP1116 charge level indicators are only active for a short time after a button press, so it was possible to see no pull-up action on those output pins and blame the chip. Thanks for your interest and assistance. RL |
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