iFixit - Active Questions With Device "Garmin GPSmap 60CSx"

Garmin GPSmap 60CSx: Garmin 60CSx GPS - Wont turn on: LTC3456 no PWRON voltage? Next steps?

Fri, 31 Jul 2026 20:22:54 -0700

Hi I am pretty new to electronics repair and I am trying to fix my Garmin 60CSx handheld GPS. It was working fine powered up on a desk then it randomly died and did not turn back on. I have tried to check the power circuit but I have been stuck on where and what to check next?

An issue I noticed from my inspection of the Main power chip, an LTC3456, is that the PWRON pin and the RESET pin are not going high? According to the datasheet I believe the PWRON pin is meant to stay HIGH to keep the Chip on after the power button is released. When the button is held pressed down, everything seems to function normally around that area. All inductor voltages seem fine and stable. No capacitors appear to be shorted. But I get no signs of life on the device.

I am unsure where to move to next, would anyone have any suggestions on where to test next?

I think the bottom left section of the board photo is for communication so I have not tested there thoroughly.
The Crystals read correct Frequencies.
The CPU's gold pins on the topside of the chip had corroded and some are missing.
There was a general spread of blue corrosion on the board when it worked fine, which I cleaned with IPA %100.
The 2 wire jumpers are to supply power from a bench power supply.

I have an oscilloscope, multimeter, soldering iron and a hot air station.

Any help is greatly appreciated thank you.

Thank you.

Update 1:

I have finished testing around the CPU and RAM. From what I can tell everything seems fine?

All values are in the photo are for when the power button is pressed down. Anything that is not listed was either 0v or a floating/fluctuating low value from 0.1v-0.3

- Both crystals show frequencies.

- Most values are within 1.6v-3.3v

- Added a picture link of the CPU areas voltages.

LTC3456 Datasheet: https://www.analog.com/media/en/technica...

Power Circuits:

The full board:

CPU area readings:

Back of the board:

***

LTC3456 Datasheet pin functions

⟐ Edited by author Temmuz 31, 2026 at 20:22 GMT-7

Garmin GPSmap 60CSx: Where can I Find the spare parts?

Tue, 21 Apr 2026 16:06:34 -0700

Hi, My battery case suffered some damage over the age, Do you sell or know where to find the back pannel assembly or just the battery terminals so i can change them?

Thanks,

⟐ Answered Nisan 21, 2026 at 16:06 GMT-7

Garmin GPSmap 60CSx: Part for Garmin Map60CSx

Mon, 31 Jul 2023 09:40:40 -0700

Need a back for my Map60CSx

Garmin GPSmap 60CSx: Screws holes are stripped or broken

Mon, 07 Feb 2022 08:28:33 -0700

Screws that hold the two halves together are stripped or holes are broken and keep letting it separate. Could I buy another case?

⟐ Answered Şubat 07, 2022 at 8:28 GMT-7

Garmin GPSmap 60CSx: Garmin GPSmap 62sc rubber coating

Fri, 21 Jan 2022 20:26:12 -0700

Can the rubber coating on the Garmin GPSmap 62sc be replaced by other GPSmap models? As in GPSmap 64x rubber coating.

Garmin GPSmap 60CSx: Need a Keypad button assembly.

Sat, 24 Jul 2021 07:09:22 -0700

Where can I purchase this part for a Garmin 60Cx

Garmin GPSmap 60CSx: I have a GpsMAP 62 and a leaking battery ruined my mother board.

Mon, 19 Jul 2021 19:04:34 -0700

Can I get a new mother board for my unit?

⟐ Answered Temmuz 19, 2021 at 19:04 GMT-7

Garmin GPSmap 60CSx: How to fix a dark grey round screen on a GPS 60?

Tue, 06 Apr 2021 23:43:45 -0700

When i put on the GPS 60, i get a large grey round on the screen which makes it difficult to read the screen . How to fix it ? Can we change the screen or motherboard ?

Garmin GPSmap 60CSx: Not connecting to my device

Tue, 04 Jun 2019 11:01:59 -0700

garmin express is not recognising my device ? any ideas ? please help

⟐ Answered Haziran 04, 2019 at 11:01 GMT-7