Huawei Ascend Maintenance Manual

Y210 Mobile Phone
Maintenance Manual
9 Principles and Failure Analysis
Issue 1.0 (2012-11-28)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
47
Troubleshooting Key or Button Failure
Figure 9-21 Key or button failure
Key or button failure
Are the FPC and ZIF
connector connected
properly?
Re-connect them
Return the phone
to the factory
Y
N
Is the keypad on the
FPC in good contact
with the dome sheet?
Clean the
keypad and the
dome sheet
N
Y
9.4.6 Tricolor Indicator and Touch Key Backlight Circuits
The Y210's battery charging indicator (tricolor indicator) provides red, green and blue light
sources that are driven by the PM8029's three LED driver.
Table 9-12 Light source and driver pins
Light Source
Driver Pin (PM8029)
Remarks
Red
LED_RED_DRV_N (MPP3)
Adjusted using electric current
Green
LED_GREEN_DRV_N (MPP5)
Adjusted using electric current
Blue
LED_BLUE_DRV_N (MPP8)
Adjusted using electric current
Figure 9-22 Status indicator circuit

Huawei Ascend Specifications

General

Brand	Huawei
Model	Ascend
Category	Cell Phone
Language	English